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>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
35 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36 #define IEEE80211_AUTH_MAX_TRIES 3
37 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
40 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41 #define IEEE80211_ASSOC_MAX_TRIES 3
43 static int max_nullfunc_tries = 2;
44 module_param(max_nullfunc_tries, int, 0644);
45 MODULE_PARM_DESC(max_nullfunc_tries,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48 static int max_probe_tries = 5;
49 module_param(max_probe_tries, int, 0644);
50 MODULE_PARM_DESC(max_probe_tries,
51 "Maximum probe tries before disconnecting (reason 4).");
54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
61 static int beacon_loss_count = 7;
62 module_param(beacon_loss_count, int, 0644);
63 MODULE_PARM_DESC(beacon_loss_count,
64 "Number of beacon intervals before we decide beacon was lost.");
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
70 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
76 static int probe_wait_ms = 500;
77 module_param(probe_wait_ms, int, 0644);
78 MODULE_PARM_DESC(probe_wait_ms,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
87 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
105 static void run_again(struct ieee80211_sub_if_data *sdata,
106 unsigned long timeout)
108 sdata_assert_lock(sdata);
110 if (!timer_pending(&sdata->u.mgd.timer) ||
111 time_before(timeout, sdata->u.mgd.timer.expires))
112 mod_timer(&sdata->u.mgd.timer, timeout);
115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
117 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
120 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
123 mod_timer(&sdata->u.mgd.bcn_mon_timer,
124 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131 if (unlikely(!sdata->u.mgd.associated))
134 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
137 mod_timer(&sdata->u.mgd.conn_mon_timer,
138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
140 ifmgd->probe_send_count = 0;
143 static int ecw2cw(int ecw)
145 return (1 << ecw) - 1;
148 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
154 case NL80211_CHAN_WIDTH_20:
155 c->width = NL80211_CHAN_WIDTH_20_NOHT;
156 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
158 case NL80211_CHAN_WIDTH_40:
159 c->width = NL80211_CHAN_WIDTH_20;
160 c->center_freq1 = c->chan->center_freq;
161 ret = IEEE80211_STA_DISABLE_40MHZ |
162 IEEE80211_STA_DISABLE_VHT;
164 case NL80211_CHAN_WIDTH_80:
165 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
169 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
170 c->width = NL80211_CHAN_WIDTH_40;
171 ret = IEEE80211_STA_DISABLE_VHT;
173 case NL80211_CHAN_WIDTH_80P80:
175 c->width = NL80211_CHAN_WIDTH_80;
176 ret = IEEE80211_STA_DISABLE_80P80MHZ |
177 IEEE80211_STA_DISABLE_160MHZ;
179 case NL80211_CHAN_WIDTH_160:
181 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
184 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
185 c->width = NL80211_CHAN_WIDTH_80;
186 ret = IEEE80211_STA_DISABLE_80P80MHZ |
187 IEEE80211_STA_DISABLE_160MHZ;
190 case NL80211_CHAN_WIDTH_20_NOHT:
192 c->width = NL80211_CHAN_WIDTH_20_NOHT;
193 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
195 case NL80211_CHAN_WIDTH_5:
196 case NL80211_CHAN_WIDTH_10:
199 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
203 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
209 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
210 struct ieee80211_supported_band *sband,
211 struct ieee80211_channel *channel,
212 const struct ieee80211_ht_operation *ht_oper,
213 const struct ieee80211_vht_operation *vht_oper,
214 struct cfg80211_chan_def *chandef, bool tracking)
216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
217 struct cfg80211_chan_def vht_chandef;
220 chandef->chan = channel;
221 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
222 chandef->center_freq1 = channel->center_freq;
223 chandef->center_freq2 = 0;
225 if (!ht_oper || !sband->ht_cap.ht_supported) {
226 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
230 chandef->width = NL80211_CHAN_WIDTH_20;
232 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
234 /* check that channel matches the right operating channel */
235 if (!tracking && channel->center_freq != ht_cfreq) {
237 * It's possible that some APs are confused here;
238 * Netgear WNDR3700 sometimes reports 4 higher than
239 * the actual channel in association responses, but
240 * since we look at probe response/beacon data here
244 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
245 channel->center_freq, ht_cfreq,
246 ht_oper->primary_chan, channel->band);
247 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
251 /* check 40 MHz support, if we have it */
252 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
253 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
254 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
255 chandef->width = NL80211_CHAN_WIDTH_40;
256 chandef->center_freq1 += 10;
258 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
259 chandef->width = NL80211_CHAN_WIDTH_40;
260 chandef->center_freq1 -= 10;
264 /* 40 MHz (and 80 MHz) must be supported for VHT */
265 ret = IEEE80211_STA_DISABLE_VHT;
266 /* also mark 40 MHz disabled */
267 ret |= IEEE80211_STA_DISABLE_40MHZ;
271 if (!vht_oper || !sband->vht_cap.vht_supported) {
272 ret = IEEE80211_STA_DISABLE_VHT;
276 vht_chandef.chan = channel;
277 vht_chandef.center_freq1 =
278 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
280 vht_chandef.center_freq2 = 0;
282 switch (vht_oper->chan_width) {
283 case IEEE80211_VHT_CHANWIDTH_USE_HT:
284 vht_chandef.width = chandef->width;
286 case IEEE80211_VHT_CHANWIDTH_80MHZ:
287 vht_chandef.width = NL80211_CHAN_WIDTH_80;
289 case IEEE80211_VHT_CHANWIDTH_160MHZ:
290 vht_chandef.width = NL80211_CHAN_WIDTH_160;
292 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
293 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
294 vht_chandef.center_freq2 =
295 ieee80211_channel_to_frequency(
296 vht_oper->center_freq_seg2_idx,
300 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
302 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
303 vht_oper->chan_width);
304 ret = IEEE80211_STA_DISABLE_VHT;
308 if (!cfg80211_chandef_valid(&vht_chandef)) {
309 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
311 "AP VHT information is invalid, disable VHT\n");
312 ret = IEEE80211_STA_DISABLE_VHT;
316 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
321 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
322 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
324 "AP VHT information doesn't match HT, disable VHT\n");
325 ret = IEEE80211_STA_DISABLE_VHT;
329 *chandef = vht_chandef;
334 /* don't print the message below for VHT mismatch if VHT is disabled */
335 if (ret & IEEE80211_STA_DISABLE_VHT)
336 vht_chandef = *chandef;
339 * Ignore the DISABLED flag when we're already connected and only
340 * tracking the APs beacon for bandwidth changes - otherwise we
341 * might get disconnected here if we connect to an AP, update our
342 * regulatory information based on the AP's country IE and the
343 * information we have is wrong/outdated and disables the channel
344 * that we're actually using for the connection to the AP.
346 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
348 IEEE80211_CHAN_DISABLED)) {
349 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
350 ret = IEEE80211_STA_DISABLE_HT |
351 IEEE80211_STA_DISABLE_VHT;
355 ret |= chandef_downgrade(chandef);
358 if (chandef->width != vht_chandef.width && !tracking)
360 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
362 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
366 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
367 struct sta_info *sta,
368 const struct ieee80211_ht_operation *ht_oper,
369 const struct ieee80211_vht_operation *vht_oper,
370 const u8 *bssid, u32 *changed)
372 struct ieee80211_local *local = sdata->local;
373 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
374 struct ieee80211_supported_band *sband;
375 struct ieee80211_channel *chan;
376 struct cfg80211_chan_def chandef;
379 enum ieee80211_sta_rx_bandwidth new_sta_bw;
382 /* if HT was/is disabled, don't track any bandwidth changes */
383 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
386 /* don't check VHT if we associated as non-VHT station */
387 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
390 if (WARN_ON_ONCE(!sta))
393 chan = sdata->vif.bss_conf.chandef.chan;
394 sband = local->hw.wiphy->bands[chan->band];
396 /* calculate new channel (type) based on HT/VHT operation IEs */
397 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
398 vht_oper, &chandef, true);
401 * Downgrade the new channel if we associated with restricted
402 * capabilities. For example, if we associated as a 20 MHz STA
403 * to a 40 MHz AP (due to regulatory, capabilities or config
404 * reasons) then switching to a 40 MHz channel now won't do us
405 * any good -- we couldn't use it with the AP.
407 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
408 chandef.width == NL80211_CHAN_WIDTH_80P80)
409 flags |= chandef_downgrade(&chandef);
410 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
411 chandef.width == NL80211_CHAN_WIDTH_160)
412 flags |= chandef_downgrade(&chandef);
413 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
414 chandef.width > NL80211_CHAN_WIDTH_20)
415 flags |= chandef_downgrade(&chandef);
417 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
421 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
422 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
423 chandef.center_freq1, chandef.center_freq2);
425 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
426 IEEE80211_STA_DISABLE_VHT |
427 IEEE80211_STA_DISABLE_40MHZ |
428 IEEE80211_STA_DISABLE_80P80MHZ |
429 IEEE80211_STA_DISABLE_160MHZ)) ||
430 !cfg80211_chandef_valid(&chandef)) {
432 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
437 switch (chandef.width) {
438 case NL80211_CHAN_WIDTH_20_NOHT:
439 case NL80211_CHAN_WIDTH_20:
440 new_sta_bw = IEEE80211_STA_RX_BW_20;
442 case NL80211_CHAN_WIDTH_40:
443 new_sta_bw = IEEE80211_STA_RX_BW_40;
445 case NL80211_CHAN_WIDTH_80:
446 new_sta_bw = IEEE80211_STA_RX_BW_80;
448 case NL80211_CHAN_WIDTH_80P80:
449 case NL80211_CHAN_WIDTH_160:
450 new_sta_bw = IEEE80211_STA_RX_BW_160;
456 if (new_sta_bw > sta->cur_max_bandwidth)
457 new_sta_bw = sta->cur_max_bandwidth;
459 if (new_sta_bw < sta->sta.bandwidth) {
460 sta->sta.bandwidth = new_sta_bw;
461 rate_control_rate_update(local, sband, sta,
462 IEEE80211_RC_BW_CHANGED);
465 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
468 "AP %pM changed bandwidth to incompatible one - disconnect\n",
473 if (new_sta_bw > sta->sta.bandwidth) {
474 sta->sta.bandwidth = new_sta_bw;
475 rate_control_rate_update(local, sband, sta,
476 IEEE80211_RC_BW_CHANGED);
479 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
481 /* if bss configuration changed store the new one */
482 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
483 *changed |= BSS_CHANGED_HT;
484 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
490 /* frame sending functions */
492 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
493 struct sk_buff *skb, u8 ap_ht_param,
494 struct ieee80211_supported_band *sband,
495 struct ieee80211_channel *channel,
496 enum ieee80211_smps_mode smps)
499 u32 flags = channel->flags;
501 struct ieee80211_sta_ht_cap ht_cap;
503 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
505 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
506 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
508 /* determine capability flags */
511 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
512 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
513 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
514 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
515 cap &= ~IEEE80211_HT_CAP_SGI_40;
518 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
519 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
520 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
521 cap &= ~IEEE80211_HT_CAP_SGI_40;
527 * If 40 MHz was disabled associate as though we weren't
528 * capable of 40 MHz -- some broken APs will never fall
529 * back to trying to transmit in 20 MHz.
531 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
532 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
533 cap &= ~IEEE80211_HT_CAP_SGI_40;
536 /* set SM PS mode properly */
537 cap &= ~IEEE80211_HT_CAP_SM_PS;
539 case IEEE80211_SMPS_AUTOMATIC:
540 case IEEE80211_SMPS_NUM_MODES:
542 case IEEE80211_SMPS_OFF:
543 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
544 IEEE80211_HT_CAP_SM_PS_SHIFT;
546 case IEEE80211_SMPS_STATIC:
547 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
548 IEEE80211_HT_CAP_SM_PS_SHIFT;
550 case IEEE80211_SMPS_DYNAMIC:
551 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
552 IEEE80211_HT_CAP_SM_PS_SHIFT;
556 /* reserve and fill IE */
557 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
558 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
561 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
563 struct ieee80211_supported_band *sband,
564 struct ieee80211_vht_cap *ap_vht_cap)
568 struct ieee80211_sta_vht_cap vht_cap;
570 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
572 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
573 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
575 /* determine capability flags */
578 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
579 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
580 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
583 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
584 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
585 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
589 * Some APs apparently get confused if our capabilities are better
590 * than theirs, so restrict what we advertise in the assoc request.
592 if (!(ap_vht_cap->vht_cap_info &
593 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
594 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
596 /* reserve and fill IE */
597 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
598 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
601 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
603 struct ieee80211_local *local = sdata->local;
604 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
605 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
607 struct ieee80211_mgmt *mgmt;
609 size_t offset = 0, noffset;
610 int i, count, rates_len, supp_rates_len, shift;
612 struct ieee80211_supported_band *sband;
613 struct ieee80211_chanctx_conf *chanctx_conf;
614 struct ieee80211_channel *chan;
615 u32 rate_flags, rates = 0;
617 sdata_assert_lock(sdata);
620 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
621 if (WARN_ON(!chanctx_conf)) {
625 chan = chanctx_conf->def.chan;
626 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
628 sband = local->hw.wiphy->bands[chan->band];
629 shift = ieee80211_vif_get_shift(&sdata->vif);
631 if (assoc_data->supp_rates_len) {
633 * Get all rates supported by the device and the AP as
634 * some APs don't like getting a superset of their rates
635 * in the association request (e.g. D-Link DAP 1353 in
638 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
639 assoc_data->supp_rates,
640 assoc_data->supp_rates_len,
644 * In case AP not provide any supported rates information
645 * before association, we send information element(s) with
646 * all rates that we support.
649 for (i = 0; i < sband->n_bitrates; i++) {
650 if ((rate_flags & sband->bitrates[i].flags)
658 skb = alloc_skb(local->hw.extra_tx_headroom +
659 sizeof(*mgmt) + /* bit too much but doesn't matter */
660 2 + assoc_data->ssid_len + /* SSID */
661 4 + rates_len + /* (extended) rates */
662 4 + /* power capability */
663 2 + 2 * sband->n_channels + /* supported channels */
664 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
665 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
666 assoc_data->ie_len + /* extra IEs */
672 skb_reserve(skb, local->hw.extra_tx_headroom);
674 capab = WLAN_CAPABILITY_ESS;
676 if (sband->band == IEEE80211_BAND_2GHZ) {
677 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
678 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
679 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
680 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
683 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
684 capab |= WLAN_CAPABILITY_PRIVACY;
686 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
687 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
688 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
690 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
692 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
693 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
694 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
696 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
698 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
699 IEEE80211_STYPE_REASSOC_REQ);
700 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
701 mgmt->u.reassoc_req.listen_interval =
702 cpu_to_le16(local->hw.conf.listen_interval);
703 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
707 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
708 IEEE80211_STYPE_ASSOC_REQ);
709 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
710 mgmt->u.assoc_req.listen_interval =
711 cpu_to_le16(local->hw.conf.listen_interval);
715 pos = skb_put(skb, 2 + assoc_data->ssid_len);
716 *pos++ = WLAN_EID_SSID;
717 *pos++ = assoc_data->ssid_len;
718 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
720 /* add all rates which were marked to be used above */
721 supp_rates_len = rates_len;
722 if (supp_rates_len > 8)
725 pos = skb_put(skb, supp_rates_len + 2);
726 *pos++ = WLAN_EID_SUPP_RATES;
727 *pos++ = supp_rates_len;
730 for (i = 0; i < sband->n_bitrates; i++) {
731 if (BIT(i) & rates) {
732 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
740 if (rates_len > count) {
741 pos = skb_put(skb, rates_len - count + 2);
742 *pos++ = WLAN_EID_EXT_SUPP_RATES;
743 *pos++ = rates_len - count;
745 for (i++; i < sband->n_bitrates; i++) {
746 if (BIT(i) & rates) {
748 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
755 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
756 /* 1. power capabilities */
757 pos = skb_put(skb, 4);
758 *pos++ = WLAN_EID_PWR_CAPABILITY;
760 *pos++ = 0; /* min tx power */
762 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
764 /* 2. supported channels */
765 /* TODO: get this in reg domain format */
766 pos = skb_put(skb, 2 * sband->n_channels + 2);
767 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
768 *pos++ = 2 * sband->n_channels;
769 for (i = 0; i < sband->n_channels; i++) {
770 *pos++ = ieee80211_frequency_to_channel(
771 sband->channels[i].center_freq);
772 *pos++ = 1; /* one channel in the subband*/
776 /* if present, add any custom IEs that go before HT */
777 if (assoc_data->ie_len && assoc_data->ie) {
778 static const u8 before_ht[] = {
781 WLAN_EID_EXT_SUPP_RATES,
782 WLAN_EID_PWR_CAPABILITY,
783 WLAN_EID_SUPPORTED_CHANNELS,
786 WLAN_EID_RRM_ENABLED_CAPABILITIES,
787 WLAN_EID_MOBILITY_DOMAIN,
788 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
790 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
791 before_ht, ARRAY_SIZE(before_ht),
793 pos = skb_put(skb, noffset - offset);
794 memcpy(pos, assoc_data->ie + offset, noffset - offset);
798 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
799 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
800 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
802 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
803 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
804 sband, chan, sdata->smps_mode);
806 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
807 ieee80211_add_vht_ie(sdata, skb, sband,
808 &assoc_data->ap_vht_cap);
810 /* if present, add any custom non-vendor IEs that go after HT */
811 if (assoc_data->ie_len && assoc_data->ie) {
812 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
815 pos = skb_put(skb, noffset - offset);
816 memcpy(pos, assoc_data->ie + offset, noffset - offset);
820 if (assoc_data->wmm) {
821 if (assoc_data->uapsd) {
822 qos_info = ifmgd->uapsd_queues;
823 qos_info |= (ifmgd->uapsd_max_sp_len <<
824 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
829 pos = skb_put(skb, 9);
830 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
831 *pos++ = 7; /* len */
832 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
835 *pos++ = 2; /* WME */
836 *pos++ = 0; /* WME info */
837 *pos++ = 1; /* WME ver */
841 /* add any remaining custom (i.e. vendor specific here) IEs */
842 if (assoc_data->ie_len && assoc_data->ie) {
843 noffset = assoc_data->ie_len;
844 pos = skb_put(skb, noffset - offset);
845 memcpy(pos, assoc_data->ie + offset, noffset - offset);
848 drv_mgd_prepare_tx(local, sdata);
850 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
851 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
852 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
853 IEEE80211_TX_INTFL_MLME_CONN_TX;
854 ieee80211_tx_skb(sdata, skb);
857 void ieee80211_send_pspoll(struct ieee80211_local *local,
858 struct ieee80211_sub_if_data *sdata)
860 struct ieee80211_pspoll *pspoll;
863 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
867 pspoll = (struct ieee80211_pspoll *) skb->data;
868 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
870 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
871 ieee80211_tx_skb(sdata, skb);
874 void ieee80211_send_nullfunc(struct ieee80211_local *local,
875 struct ieee80211_sub_if_data *sdata,
879 struct ieee80211_hdr_3addr *nullfunc;
880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
882 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
886 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
888 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
890 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
891 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
893 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
894 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
896 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
897 IEEE80211_STA_CONNECTION_POLL))
898 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
900 ieee80211_tx_skb(sdata, skb);
903 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
904 struct ieee80211_sub_if_data *sdata)
907 struct ieee80211_hdr *nullfunc;
910 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
913 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
917 skb_reserve(skb, local->hw.extra_tx_headroom);
919 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
920 memset(nullfunc, 0, 30);
921 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
922 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
923 nullfunc->frame_control = fc;
924 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
925 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
926 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
927 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
929 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
930 ieee80211_tx_skb(sdata, skb);
933 /* spectrum management related things */
934 static void ieee80211_chswitch_work(struct work_struct *work)
936 struct ieee80211_sub_if_data *sdata =
937 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
938 struct ieee80211_local *local = sdata->local;
939 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
941 if (!ieee80211_sdata_running(sdata))
945 if (!ifmgd->associated)
948 local->_oper_chandef = local->csa_chandef;
950 if (!local->ops->channel_switch) {
951 /* call "hw_config" only if doing sw channel switch */
952 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
954 /* update the device channel directly */
955 local->hw.conf.chandef = local->_oper_chandef;
958 /* XXX: shouldn't really modify cfg80211-owned data! */
959 ifmgd->associated->channel = local->_oper_chandef.chan;
961 /* XXX: wait for a beacon first? */
962 ieee80211_wake_queues_by_reason(&local->hw,
963 IEEE80211_MAX_QUEUE_MAP,
964 IEEE80211_QUEUE_STOP_REASON_CSA);
966 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
970 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
972 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
973 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
975 trace_api_chswitch_done(sdata, success);
978 "driver channel switch failed, disconnecting\n");
979 ieee80211_queue_work(&sdata->local->hw,
980 &ifmgd->csa_connection_drop_work);
982 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
985 EXPORT_SYMBOL(ieee80211_chswitch_done);
987 static void ieee80211_chswitch_timer(unsigned long data)
989 struct ieee80211_sub_if_data *sdata =
990 (struct ieee80211_sub_if_data *) data;
992 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
996 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
997 u64 timestamp, struct ieee802_11_elems *elems,
1000 struct ieee80211_local *local = sdata->local;
1001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1002 struct cfg80211_bss *cbss = ifmgd->associated;
1003 struct ieee80211_bss *bss;
1004 struct ieee80211_chanctx *chanctx;
1005 enum ieee80211_band new_band;
1010 struct ieee80211_channel *new_chan;
1011 struct cfg80211_chan_def new_chandef = {};
1012 struct cfg80211_chan_def new_vht_chandef = {};
1013 const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1014 const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1015 const struct ieee80211_ht_operation *ht_oper;
1016 int secondary_channel_offset = -1;
1018 sdata_assert_lock(sdata);
1023 if (local->scanning)
1026 /* disregard subsequent announcements if we are already processing */
1027 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1030 sec_chan_offs = elems->sec_chan_offs;
1031 wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1032 ht_oper = elems->ht_operation;
1034 if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1035 IEEE80211_STA_DISABLE_40MHZ)) {
1036 sec_chan_offs = NULL;
1037 wide_bw_chansw_ie = NULL;
1038 /* only used for bandwidth here */
1042 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1043 wide_bw_chansw_ie = NULL;
1045 if (elems->ext_chansw_ie) {
1046 if (!ieee80211_operating_class_to_band(
1047 elems->ext_chansw_ie->new_operating_class,
1050 "cannot understand ECSA IE operating class %d, disconnecting\n",
1051 elems->ext_chansw_ie->new_operating_class);
1052 ieee80211_queue_work(&local->hw,
1053 &ifmgd->csa_connection_drop_work);
1055 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1056 count = elems->ext_chansw_ie->count;
1057 mode = elems->ext_chansw_ie->mode;
1058 } else if (elems->ch_switch_ie) {
1059 new_band = cbss->channel->band;
1060 new_chan_no = elems->ch_switch_ie->new_ch_num;
1061 count = elems->ch_switch_ie->count;
1062 mode = elems->ch_switch_ie->mode;
1064 /* nothing here we understand */
1068 bss = (void *)cbss->priv;
1070 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1071 new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1072 if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1074 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1075 ifmgd->associated->bssid, new_freq);
1076 ieee80211_queue_work(&local->hw,
1077 &ifmgd->csa_connection_drop_work);
1081 if (!beacon && sec_chan_offs) {
1082 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1083 } else if (beacon && ht_oper) {
1084 secondary_channel_offset =
1085 ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
1086 } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1088 * If it's not a beacon, HT is enabled and the IE not present,
1089 * it's 20 MHz, 802.11-2012 8.5.2.6:
1090 * This element [the Secondary Channel Offset Element] is
1091 * present when switching to a 40 MHz channel. It may be
1092 * present when switching to a 20 MHz channel (in which
1093 * case the secondary channel offset is set to SCN).
1095 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1098 switch (secondary_channel_offset) {
1100 /* secondary_channel_offset was present but is invalid */
1101 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1102 cfg80211_chandef_create(&new_chandef, new_chan,
1105 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1106 cfg80211_chandef_create(&new_chandef, new_chan,
1107 NL80211_CHAN_HT40PLUS);
1109 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1110 cfg80211_chandef_create(&new_chandef, new_chan,
1111 NL80211_CHAN_HT40MINUS);
1114 cfg80211_chandef_create(&new_chandef, new_chan,
1115 NL80211_CHAN_NO_HT);
1119 if (wide_bw_chansw_ie) {
1120 new_vht_chandef.chan = new_chan;
1121 new_vht_chandef.center_freq1 =
1122 ieee80211_channel_to_frequency(
1123 wide_bw_chansw_ie->new_center_freq_seg0,
1126 switch (wide_bw_chansw_ie->new_channel_width) {
1128 /* hmmm, ignore VHT and use HT if present */
1129 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1130 new_vht_chandef.chan = NULL;
1132 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1133 new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1135 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1136 new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1138 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1139 /* field is otherwise reserved */
1140 new_vht_chandef.center_freq2 =
1141 ieee80211_channel_to_frequency(
1142 wide_bw_chansw_ie->new_center_freq_seg1,
1144 new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1147 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1148 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1149 chandef_downgrade(&new_vht_chandef);
1150 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1151 new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1152 chandef_downgrade(&new_vht_chandef);
1153 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1154 new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1155 chandef_downgrade(&new_vht_chandef);
1158 /* if VHT data is there validate & use it */
1159 if (new_vht_chandef.chan) {
1160 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1163 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1164 ifmgd->associated->bssid);
1165 ieee80211_queue_work(&local->hw,
1166 &ifmgd->csa_connection_drop_work);
1169 new_chandef = new_vht_chandef;
1172 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1173 IEEE80211_CHAN_DISABLED)) {
1175 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1176 ifmgd->associated->bssid, new_freq,
1177 new_chandef.width, new_chandef.center_freq1,
1178 new_chandef.center_freq2);
1179 ieee80211_queue_work(&local->hw,
1180 &ifmgd->csa_connection_drop_work);
1184 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1186 if (local->use_chanctx) {
1188 "not handling channel switch with channel contexts\n");
1189 ieee80211_queue_work(&local->hw,
1190 &ifmgd->csa_connection_drop_work);
1194 mutex_lock(&local->chanctx_mtx);
1195 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1196 mutex_unlock(&local->chanctx_mtx);
1199 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1200 struct ieee80211_chanctx, conf);
1201 if (chanctx->refcount > 1) {
1203 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1204 ieee80211_queue_work(&local->hw,
1205 &ifmgd->csa_connection_drop_work);
1206 mutex_unlock(&local->chanctx_mtx);
1209 mutex_unlock(&local->chanctx_mtx);
1211 local->csa_chandef = new_chandef;
1214 ieee80211_stop_queues_by_reason(&local->hw,
1215 IEEE80211_MAX_QUEUE_MAP,
1216 IEEE80211_QUEUE_STOP_REASON_CSA);
1218 if (local->ops->channel_switch) {
1219 /* use driver's channel switch callback */
1220 struct ieee80211_channel_switch ch_switch = {
1221 .timestamp = timestamp,
1223 .chandef = new_chandef,
1227 drv_channel_switch(local, &ch_switch);
1231 /* channel switch handled in software */
1233 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1235 mod_timer(&ifmgd->chswitch_timer,
1236 TU_TO_EXP_TIME(count * cbss->beacon_interval));
1239 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1240 struct ieee80211_channel *channel,
1241 const u8 *country_ie, u8 country_ie_len,
1242 const u8 *pwr_constr_elem)
1244 struct ieee80211_country_ie_triplet *triplet;
1245 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1246 int i, chan_pwr, chan_increment, new_ap_level;
1247 bool have_chan_pwr = false;
1250 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1253 triplet = (void *)(country_ie + 3);
1254 country_ie_len -= 3;
1256 switch (channel->band) {
1260 case IEEE80211_BAND_2GHZ:
1261 case IEEE80211_BAND_60GHZ:
1264 case IEEE80211_BAND_5GHZ:
1270 while (country_ie_len >= 3) {
1271 u8 first_channel = triplet->chans.first_channel;
1273 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1276 for (i = 0; i < triplet->chans.num_channels; i++) {
1277 if (first_channel + i * chan_increment == chan) {
1278 have_chan_pwr = true;
1279 chan_pwr = triplet->chans.max_power;
1288 country_ie_len -= 3;
1294 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1296 if (sdata->ap_power_level == new_ap_level)
1300 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1301 new_ap_level, chan_pwr, *pwr_constr_elem,
1302 sdata->u.mgd.bssid);
1303 sdata->ap_power_level = new_ap_level;
1304 if (__ieee80211_recalc_txpower(sdata))
1305 return BSS_CHANGED_TXPOWER;
1310 static void ieee80211_enable_ps(struct ieee80211_local *local,
1311 struct ieee80211_sub_if_data *sdata)
1313 struct ieee80211_conf *conf = &local->hw.conf;
1316 * If we are scanning right now then the parameters will
1317 * take effect when scan finishes.
1319 if (local->scanning)
1322 if (conf->dynamic_ps_timeout > 0 &&
1323 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1324 mod_timer(&local->dynamic_ps_timer, jiffies +
1325 msecs_to_jiffies(conf->dynamic_ps_timeout));
1327 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1328 ieee80211_send_nullfunc(local, sdata, 1);
1330 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1331 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1334 conf->flags |= IEEE80211_CONF_PS;
1335 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1339 static void ieee80211_change_ps(struct ieee80211_local *local)
1341 struct ieee80211_conf *conf = &local->hw.conf;
1343 if (local->ps_sdata) {
1344 ieee80211_enable_ps(local, local->ps_sdata);
1345 } else if (conf->flags & IEEE80211_CONF_PS) {
1346 conf->flags &= ~IEEE80211_CONF_PS;
1347 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1348 del_timer_sync(&local->dynamic_ps_timer);
1349 cancel_work_sync(&local->dynamic_ps_enable_work);
1353 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1355 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1356 struct sta_info *sta = NULL;
1357 bool authorized = false;
1359 if (!mgd->powersave)
1365 if (!mgd->associated)
1368 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1369 IEEE80211_STA_CONNECTION_POLL))
1372 if (!mgd->have_beacon)
1376 sta = sta_info_get(sdata, mgd->bssid);
1378 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1384 /* need to hold RTNL or interface lock */
1385 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1387 struct ieee80211_sub_if_data *sdata, *found = NULL;
1391 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1392 local->ps_sdata = NULL;
1396 list_for_each_entry(sdata, &local->interfaces, list) {
1397 if (!ieee80211_sdata_running(sdata))
1399 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1400 /* If an AP vif is found, then disable PS
1401 * by setting the count to zero thereby setting
1407 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1413 if (count == 1 && ieee80211_powersave_allowed(found)) {
1417 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1419 beaconint_us = ieee80211_tu_to_usec(
1420 found->vif.bss_conf.beacon_int);
1422 timeout = local->dynamic_ps_forced_timeout;
1425 * Go to full PSM if the user configures a very low
1426 * latency requirement.
1427 * The 2000 second value is there for compatibility
1428 * until the PM_QOS_NETWORK_LATENCY is configured
1431 if (latency > (1900 * USEC_PER_MSEC) &&
1432 latency != (2000 * USEC_PER_SEC))
1437 local->hw.conf.dynamic_ps_timeout = timeout;
1439 if (beaconint_us > latency) {
1440 local->ps_sdata = NULL;
1443 u8 dtimper = found->u.mgd.dtim_period;
1445 /* If the TIM IE is invalid, pretend the value is 1 */
1448 else if (dtimper > 1)
1449 maxslp = min_t(int, dtimper,
1450 latency / beaconint_us);
1452 local->hw.conf.max_sleep_period = maxslp;
1453 local->hw.conf.ps_dtim_period = dtimper;
1454 local->ps_sdata = found;
1457 local->ps_sdata = NULL;
1460 ieee80211_change_ps(local);
1463 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1465 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1467 if (sdata->vif.bss_conf.ps != ps_allowed) {
1468 sdata->vif.bss_conf.ps = ps_allowed;
1469 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1473 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1475 struct ieee80211_local *local =
1476 container_of(work, struct ieee80211_local,
1477 dynamic_ps_disable_work);
1479 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1480 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1481 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1484 ieee80211_wake_queues_by_reason(&local->hw,
1485 IEEE80211_MAX_QUEUE_MAP,
1486 IEEE80211_QUEUE_STOP_REASON_PS);
1489 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1491 struct ieee80211_local *local =
1492 container_of(work, struct ieee80211_local,
1493 dynamic_ps_enable_work);
1494 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1495 struct ieee80211_if_managed *ifmgd;
1496 unsigned long flags;
1499 /* can only happen when PS was just disabled anyway */
1503 ifmgd = &sdata->u.mgd;
1505 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1508 if (local->hw.conf.dynamic_ps_timeout > 0) {
1509 /* don't enter PS if TX frames are pending */
1510 if (drv_tx_frames_pending(local)) {
1511 mod_timer(&local->dynamic_ps_timer, jiffies +
1513 local->hw.conf.dynamic_ps_timeout));
1518 * transmission can be stopped by others which leads to
1519 * dynamic_ps_timer expiry. Postpone the ps timer if it
1520 * is not the actual idle state.
1522 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1523 for (q = 0; q < local->hw.queues; q++) {
1524 if (local->queue_stop_reasons[q]) {
1525 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1527 mod_timer(&local->dynamic_ps_timer, jiffies +
1529 local->hw.conf.dynamic_ps_timeout));
1533 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1536 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1537 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1538 if (drv_tx_frames_pending(local)) {
1539 mod_timer(&local->dynamic_ps_timer, jiffies +
1541 local->hw.conf.dynamic_ps_timeout));
1543 ieee80211_send_nullfunc(local, sdata, 1);
1544 /* Flush to get the tx status of nullfunc frame */
1545 ieee80211_flush_queues(local, sdata);
1549 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1550 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1551 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1552 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1553 local->hw.conf.flags |= IEEE80211_CONF_PS;
1554 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1558 void ieee80211_dynamic_ps_timer(unsigned long data)
1560 struct ieee80211_local *local = (void *) data;
1562 if (local->quiescing || local->suspended)
1565 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1568 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1570 struct delayed_work *delayed_work =
1571 container_of(work, struct delayed_work, work);
1572 struct ieee80211_sub_if_data *sdata =
1573 container_of(delayed_work, struct ieee80211_sub_if_data,
1574 dfs_cac_timer_work);
1576 ieee80211_vif_release_channel(sdata);
1578 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1582 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1583 struct ieee80211_sub_if_data *sdata,
1584 const u8 *wmm_param, size_t wmm_param_len)
1586 struct ieee80211_tx_queue_params params;
1587 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1591 u8 uapsd_queues = 0;
1593 if (!local->ops->conf_tx)
1596 if (local->hw.queues < IEEE80211_NUM_ACS)
1602 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1605 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1606 uapsd_queues = ifmgd->uapsd_queues;
1608 count = wmm_param[6] & 0x0f;
1609 if (count == ifmgd->wmm_last_param_set)
1611 ifmgd->wmm_last_param_set = count;
1613 pos = wmm_param + 8;
1614 left = wmm_param_len - 8;
1616 memset(¶ms, 0, sizeof(params));
1619 for (; left >= 4; left -= 4, pos += 4) {
1620 int aci = (pos[0] >> 5) & 0x03;
1621 int acm = (pos[0] >> 4) & 0x01;
1629 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1630 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1636 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1637 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1643 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1644 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1651 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1652 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1657 params.aifs = pos[0] & 0x0f;
1658 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1659 params.cw_min = ecw2cw(pos[1] & 0x0f);
1660 params.txop = get_unaligned_le16(pos + 2);
1662 params.uapsd = uapsd;
1665 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1667 params.aifs, params.cw_min, params.cw_max,
1668 params.txop, params.uapsd);
1669 sdata->tx_conf[queue] = params;
1670 if (drv_conf_tx(local, sdata, queue, ¶ms))
1672 "failed to set TX queue parameters for queue %d\n",
1676 /* enable WMM or activate new settings */
1677 sdata->vif.bss_conf.qos = true;
1681 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1683 lockdep_assert_held(&sdata->local->mtx);
1685 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1686 IEEE80211_STA_BEACON_POLL);
1687 ieee80211_run_deferred_scan(sdata->local);
1690 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1692 mutex_lock(&sdata->local->mtx);
1693 __ieee80211_stop_poll(sdata);
1694 mutex_unlock(&sdata->local->mtx);
1697 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1698 u16 capab, bool erp_valid, u8 erp)
1700 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1702 bool use_protection;
1703 bool use_short_preamble;
1704 bool use_short_slot;
1707 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1708 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1710 use_protection = false;
1711 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1714 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1715 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1716 use_short_slot = true;
1718 if (use_protection != bss_conf->use_cts_prot) {
1719 bss_conf->use_cts_prot = use_protection;
1720 changed |= BSS_CHANGED_ERP_CTS_PROT;
1723 if (use_short_preamble != bss_conf->use_short_preamble) {
1724 bss_conf->use_short_preamble = use_short_preamble;
1725 changed |= BSS_CHANGED_ERP_PREAMBLE;
1728 if (use_short_slot != bss_conf->use_short_slot) {
1729 bss_conf->use_short_slot = use_short_slot;
1730 changed |= BSS_CHANGED_ERP_SLOT;
1736 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1737 struct cfg80211_bss *cbss,
1738 u32 bss_info_changed)
1740 struct ieee80211_bss *bss = (void *)cbss->priv;
1741 struct ieee80211_local *local = sdata->local;
1742 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1744 bss_info_changed |= BSS_CHANGED_ASSOC;
1745 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1746 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1748 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1749 beacon_loss_count * bss_conf->beacon_int));
1751 sdata->u.mgd.associated = cbss;
1752 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1754 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1756 if (sdata->vif.p2p) {
1757 const struct cfg80211_bss_ies *ies;
1760 ies = rcu_dereference(cbss->ies);
1764 ret = cfg80211_get_p2p_attr(
1765 ies->data, ies->len,
1766 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1767 (u8 *) &bss_conf->p2p_noa_attr,
1768 sizeof(bss_conf->p2p_noa_attr));
1770 sdata->u.mgd.p2p_noa_index =
1771 bss_conf->p2p_noa_attr.index;
1772 bss_info_changed |= BSS_CHANGED_P2P_PS;
1778 /* just to be sure */
1779 ieee80211_stop_poll(sdata);
1781 ieee80211_led_assoc(local, 1);
1783 if (sdata->u.mgd.have_beacon) {
1785 * If the AP is buggy we may get here with no DTIM period
1786 * known, so assume it's 1 which is the only safe assumption
1787 * in that case, although if the TIM IE is broken powersave
1788 * probably just won't work at all.
1790 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1791 bss_conf->beacon_rate = bss->beacon_rate;
1792 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1794 bss_conf->beacon_rate = NULL;
1795 bss_conf->dtim_period = 0;
1798 bss_conf->assoc = 1;
1800 /* Tell the driver to monitor connection quality (if supported) */
1801 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1802 bss_conf->cqm_rssi_thold)
1803 bss_info_changed |= BSS_CHANGED_CQM;
1805 /* Enable ARP filtering */
1806 if (bss_conf->arp_addr_cnt)
1807 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1809 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1811 mutex_lock(&local->iflist_mtx);
1812 ieee80211_recalc_ps(local, -1);
1813 mutex_unlock(&local->iflist_mtx);
1815 ieee80211_recalc_smps(sdata);
1816 ieee80211_recalc_ps_vif(sdata);
1818 netif_carrier_on(sdata->dev);
1821 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1822 u16 stype, u16 reason, bool tx,
1825 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1826 struct ieee80211_local *local = sdata->local;
1829 sdata_assert_lock(sdata);
1831 if (WARN_ON_ONCE(tx && !frame_buf))
1834 if (WARN_ON(!ifmgd->associated))
1837 ieee80211_stop_poll(sdata);
1839 ifmgd->associated = NULL;
1840 netif_carrier_off(sdata->dev);
1843 * if we want to get out of ps before disassoc (why?) we have
1844 * to do it before sending disassoc, as otherwise the null-packet
1847 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1848 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1849 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1851 local->ps_sdata = NULL;
1853 /* disable per-vif ps */
1854 ieee80211_recalc_ps_vif(sdata);
1856 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1858 ieee80211_flush_queues(local, sdata);
1860 /* deauthenticate/disassociate now */
1861 if (tx || frame_buf)
1862 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1863 reason, tx, frame_buf);
1865 /* flush out frame */
1867 ieee80211_flush_queues(local, sdata);
1869 /* clear bssid only after building the needed mgmt frames */
1870 memset(ifmgd->bssid, 0, ETH_ALEN);
1872 /* remove AP and TDLS peers */
1873 sta_info_flush_defer(sdata);
1875 /* finally reset all BSS / config parameters */
1876 changed |= ieee80211_reset_erp_info(sdata);
1878 ieee80211_led_assoc(local, 0);
1879 changed |= BSS_CHANGED_ASSOC;
1880 sdata->vif.bss_conf.assoc = false;
1882 ifmgd->p2p_noa_index = -1;
1883 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1884 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1886 /* on the next assoc, re-program HT/VHT parameters */
1887 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1888 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1889 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1890 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1892 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1894 del_timer_sync(&local->dynamic_ps_timer);
1895 cancel_work_sync(&local->dynamic_ps_enable_work);
1897 /* Disable ARP filtering */
1898 if (sdata->vif.bss_conf.arp_addr_cnt)
1899 changed |= BSS_CHANGED_ARP_FILTER;
1901 sdata->vif.bss_conf.qos = false;
1902 changed |= BSS_CHANGED_QOS;
1904 /* The BSSID (not really interesting) and HT changed */
1905 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1906 ieee80211_bss_info_change_notify(sdata, changed);
1908 /* disassociated - set to defaults now */
1909 ieee80211_set_wmm_default(sdata, false);
1911 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1912 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1913 del_timer_sync(&sdata->u.mgd.timer);
1914 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1916 sdata->vif.bss_conf.dtim_period = 0;
1917 sdata->vif.bss_conf.beacon_rate = NULL;
1919 ifmgd->have_beacon = false;
1922 ieee80211_vif_release_channel(sdata);
1925 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1926 struct ieee80211_hdr *hdr)
1929 * We can postpone the mgd.timer whenever receiving unicast frames
1930 * from AP because we know that the connection is working both ways
1931 * at that time. But multicast frames (and hence also beacons) must
1932 * be ignored here, because we need to trigger the timer during
1933 * data idle periods for sending the periodic probe request to the
1934 * AP we're connected to.
1936 if (is_multicast_ether_addr(hdr->addr1))
1939 ieee80211_sta_reset_conn_monitor(sdata);
1942 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1944 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1945 struct ieee80211_local *local = sdata->local;
1947 mutex_lock(&local->mtx);
1948 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1949 IEEE80211_STA_CONNECTION_POLL))) {
1950 mutex_unlock(&local->mtx);
1954 __ieee80211_stop_poll(sdata);
1956 mutex_lock(&local->iflist_mtx);
1957 ieee80211_recalc_ps(local, -1);
1958 mutex_unlock(&local->iflist_mtx);
1960 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1964 * We've received a probe response, but are not sure whether
1965 * we have or will be receiving any beacons or data, so let's
1966 * schedule the timers again, just in case.
1968 ieee80211_sta_reset_beacon_monitor(sdata);
1970 mod_timer(&ifmgd->conn_mon_timer,
1971 round_jiffies_up(jiffies +
1972 IEEE80211_CONNECTION_IDLE_TIME));
1974 mutex_unlock(&local->mtx);
1977 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1978 struct ieee80211_hdr *hdr, bool ack)
1980 if (!ieee80211_is_data(hdr->frame_control))
1983 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1984 sdata->u.mgd.probe_send_count > 0) {
1986 ieee80211_sta_reset_conn_monitor(sdata);
1988 sdata->u.mgd.nullfunc_failed = true;
1989 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1994 ieee80211_sta_reset_conn_monitor(sdata);
1997 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1999 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2001 u8 *dst = ifmgd->associated->bssid;
2002 u8 unicast_limit = max(1, max_probe_tries - 3);
2005 * Try sending broadcast probe requests for the last three
2006 * probe requests after the first ones failed since some
2007 * buggy APs only support broadcast probe requests.
2009 if (ifmgd->probe_send_count >= unicast_limit)
2013 * When the hardware reports an accurate Tx ACK status, it's
2014 * better to send a nullfunc frame instead of a probe request,
2015 * as it will kick us off the AP quickly if we aren't associated
2016 * anymore. The timeout will be reset if the frame is ACKed by
2019 ifmgd->probe_send_count++;
2021 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2022 ifmgd->nullfunc_failed = false;
2023 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2028 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2029 if (WARN_ON_ONCE(ssid == NULL))
2034 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2035 0, (u32) -1, true, 0,
2036 ifmgd->associated->channel, false);
2040 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2041 run_again(sdata, ifmgd->probe_timeout);
2042 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2043 ieee80211_flush_queues(sdata->local, sdata);
2046 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2049 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2050 bool already = false;
2052 if (!ieee80211_sdata_running(sdata))
2057 if (!ifmgd->associated)
2060 mutex_lock(&sdata->local->mtx);
2062 if (sdata->local->tmp_channel || sdata->local->scanning) {
2063 mutex_unlock(&sdata->local->mtx);
2068 mlme_dbg_ratelimited(sdata,
2069 "detected beacon loss from AP (missed %d beacons) - probing\n",
2072 ieee80211_cqm_rssi_notify(&sdata->vif,
2073 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2078 * The driver/our work has already reported this event or the
2079 * connection monitoring has kicked in and we have already sent
2080 * a probe request. Or maybe the AP died and the driver keeps
2081 * reporting until we disassociate...
2083 * In either case we have to ignore the current call to this
2084 * function (except for setting the correct probe reason bit)
2085 * because otherwise we would reset the timer every time and
2086 * never check whether we received a probe response!
2088 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2089 IEEE80211_STA_CONNECTION_POLL))
2093 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2095 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2097 mutex_unlock(&sdata->local->mtx);
2102 mutex_lock(&sdata->local->iflist_mtx);
2103 ieee80211_recalc_ps(sdata->local, -1);
2104 mutex_unlock(&sdata->local->iflist_mtx);
2106 ifmgd->probe_send_count = 0;
2107 ieee80211_mgd_probe_ap_send(sdata);
2109 sdata_unlock(sdata);
2112 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2113 struct ieee80211_vif *vif)
2115 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2116 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2117 struct cfg80211_bss *cbss;
2118 struct sk_buff *skb;
2122 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2125 sdata_assert_lock(sdata);
2127 if (ifmgd->associated)
2128 cbss = ifmgd->associated;
2129 else if (ifmgd->auth_data)
2130 cbss = ifmgd->auth_data->bss;
2131 else if (ifmgd->assoc_data)
2132 cbss = ifmgd->assoc_data->bss;
2137 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2138 if (WARN_ON_ONCE(ssid == NULL))
2143 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2144 (u32) -1, cbss->channel,
2151 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2153 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2156 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2159 if (!ifmgd->associated) {
2160 sdata_unlock(sdata);
2164 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2165 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2167 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2168 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2169 IEEE80211_MAX_QUEUE_MAP,
2170 IEEE80211_QUEUE_STOP_REASON_CSA);
2172 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2173 IEEE80211_DEAUTH_FRAME_LEN);
2174 sdata_unlock(sdata);
2177 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2179 struct ieee80211_sub_if_data *sdata =
2180 container_of(work, struct ieee80211_sub_if_data,
2181 u.mgd.beacon_connection_loss_work);
2182 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2183 struct sta_info *sta;
2185 if (ifmgd->associated) {
2187 sta = sta_info_get(sdata, ifmgd->bssid);
2189 sta->beacon_loss_count++;
2193 if (ifmgd->connection_loss) {
2194 sdata_info(sdata, "Connection to AP %pM lost\n",
2196 __ieee80211_disconnect(sdata);
2198 ieee80211_mgd_probe_ap(sdata, true);
2202 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2204 struct ieee80211_sub_if_data *sdata =
2205 container_of(work, struct ieee80211_sub_if_data,
2206 u.mgd.csa_connection_drop_work);
2208 __ieee80211_disconnect(sdata);
2211 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2213 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2214 struct ieee80211_hw *hw = &sdata->local->hw;
2216 trace_api_beacon_loss(sdata);
2218 sdata->u.mgd.connection_loss = false;
2219 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2221 EXPORT_SYMBOL(ieee80211_beacon_loss);
2223 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2225 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2226 struct ieee80211_hw *hw = &sdata->local->hw;
2228 trace_api_connection_loss(sdata);
2230 sdata->u.mgd.connection_loss = true;
2231 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2233 EXPORT_SYMBOL(ieee80211_connection_loss);
2236 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2239 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2241 sdata_assert_lock(sdata);
2244 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2246 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2247 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2248 sdata->u.mgd.flags = 0;
2249 ieee80211_vif_release_channel(sdata);
2252 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2254 sdata->u.mgd.auth_data = NULL;
2257 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2258 struct ieee80211_mgmt *mgmt, size_t len)
2260 struct ieee80211_local *local = sdata->local;
2261 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2263 struct ieee802_11_elems elems;
2266 pos = mgmt->u.auth.variable;
2267 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2268 if (!elems.challenge)
2270 auth_data->expected_transaction = 4;
2271 drv_mgd_prepare_tx(sdata->local, sdata);
2272 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2273 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2274 IEEE80211_TX_INTFL_MLME_CONN_TX;
2275 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2276 elems.challenge - 2, elems.challenge_len + 2,
2277 auth_data->bss->bssid, auth_data->bss->bssid,
2278 auth_data->key, auth_data->key_len,
2279 auth_data->key_idx, tx_flags);
2282 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2283 struct ieee80211_mgmt *mgmt, size_t len)
2285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2287 u16 auth_alg, auth_transaction, status_code;
2288 struct sta_info *sta;
2290 sdata_assert_lock(sdata);
2295 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2298 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2300 if (!ether_addr_equal(bssid, mgmt->bssid))
2303 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2304 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2305 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2307 if (auth_alg != ifmgd->auth_data->algorithm ||
2308 auth_transaction != ifmgd->auth_data->expected_transaction) {
2309 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2310 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2312 ifmgd->auth_data->expected_transaction);
2316 if (status_code != WLAN_STATUS_SUCCESS) {
2317 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2318 mgmt->sa, status_code);
2319 ieee80211_destroy_auth_data(sdata, false);
2320 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2324 switch (ifmgd->auth_data->algorithm) {
2325 case WLAN_AUTH_OPEN:
2326 case WLAN_AUTH_LEAP:
2330 case WLAN_AUTH_SHARED_KEY:
2331 if (ifmgd->auth_data->expected_transaction != 4) {
2332 ieee80211_auth_challenge(sdata, mgmt, len);
2333 /* need another frame */
2338 WARN_ONCE(1, "invalid auth alg %d",
2339 ifmgd->auth_data->algorithm);
2343 sdata_info(sdata, "authenticated\n");
2344 ifmgd->auth_data->done = true;
2345 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2346 ifmgd->auth_data->timeout_started = true;
2347 run_again(sdata, ifmgd->auth_data->timeout);
2349 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2350 ifmgd->auth_data->expected_transaction != 2) {
2352 * Report auth frame to user space for processing since another
2353 * round of Authentication frames is still needed.
2355 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2359 /* move station state to auth */
2360 mutex_lock(&sdata->local->sta_mtx);
2361 sta = sta_info_get(sdata, bssid);
2363 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2366 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2367 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2370 mutex_unlock(&sdata->local->sta_mtx);
2372 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2375 mutex_unlock(&sdata->local->sta_mtx);
2376 /* ignore frame -- wait for timeout */
2380 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2381 struct ieee80211_mgmt *mgmt, size_t len)
2383 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2384 const u8 *bssid = NULL;
2387 sdata_assert_lock(sdata);
2392 if (!ifmgd->associated ||
2393 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2396 bssid = ifmgd->associated->bssid;
2398 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2400 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2401 bssid, reason_code);
2403 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2405 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2409 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2410 struct ieee80211_mgmt *mgmt, size_t len)
2412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2415 sdata_assert_lock(sdata);
2420 if (!ifmgd->associated ||
2421 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2424 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2426 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2427 mgmt->sa, reason_code);
2429 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2431 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2434 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2435 u8 *supp_rates, unsigned int supp_rates_len,
2436 u32 *rates, u32 *basic_rates,
2437 bool *have_higher_than_11mbit,
2438 int *min_rate, int *min_rate_index,
2439 int shift, u32 rate_flags)
2443 for (i = 0; i < supp_rates_len; i++) {
2444 int rate = supp_rates[i] & 0x7f;
2445 bool is_basic = !!(supp_rates[i] & 0x80);
2447 if ((rate * 5 * (1 << shift)) > 110)
2448 *have_higher_than_11mbit = true;
2451 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2452 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2454 * Note: Even through the membership selector and the basic
2455 * rate flag share the same bit, they are not exactly
2458 if (!!(supp_rates[i] & 0x80) &&
2459 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2462 for (j = 0; j < sband->n_bitrates; j++) {
2463 struct ieee80211_rate *br;
2466 br = &sband->bitrates[j];
2467 if ((rate_flags & br->flags) != rate_flags)
2470 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2471 if (brate == rate) {
2474 *basic_rates |= BIT(j);
2475 if ((rate * 5) < *min_rate) {
2476 *min_rate = rate * 5;
2477 *min_rate_index = j;
2485 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2488 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2490 sdata_assert_lock(sdata);
2493 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2495 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2496 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2497 sdata->u.mgd.flags = 0;
2498 ieee80211_vif_release_channel(sdata);
2502 sdata->u.mgd.assoc_data = NULL;
2505 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2506 struct cfg80211_bss *cbss,
2507 struct ieee80211_mgmt *mgmt, size_t len)
2509 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2510 struct ieee80211_local *local = sdata->local;
2511 struct ieee80211_supported_band *sband;
2512 struct sta_info *sta;
2514 u16 capab_info, aid;
2515 struct ieee802_11_elems elems;
2516 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2517 const struct cfg80211_bss_ies *bss_ies = NULL;
2518 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2523 /* AssocResp and ReassocResp have identical structure */
2525 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2526 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2528 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2529 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2531 aid &= ~(BIT(15) | BIT(14));
2533 ifmgd->broken_ap = false;
2535 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2536 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2539 ifmgd->broken_ap = true;
2542 pos = mgmt->u.assoc_resp.variable;
2543 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2545 if (!elems.supp_rates) {
2546 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2553 * Some APs are erroneously not including some information in their
2554 * (re)association response frames. Try to recover by using the data
2555 * from the beacon or probe response. This seems to afflict mobile
2556 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2557 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2559 if ((assoc_data->wmm && !elems.wmm_param) ||
2560 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2561 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2562 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2563 (!elems.vht_cap_elem || !elems.vht_operation))) {
2564 const struct cfg80211_bss_ies *ies;
2565 struct ieee802_11_elems bss_elems;
2568 ies = rcu_dereference(cbss->ies);
2570 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2576 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2578 if (assoc_data->wmm &&
2579 !elems.wmm_param && bss_elems.wmm_param) {
2580 elems.wmm_param = bss_elems.wmm_param;
2582 "AP bug: WMM param missing from AssocResp\n");
2586 * Also check if we requested HT/VHT, otherwise the AP doesn't
2587 * have to include the IEs in the (re)association response.
2589 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2590 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2591 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2593 "AP bug: HT capability missing from AssocResp\n");
2595 if (!elems.ht_operation && bss_elems.ht_operation &&
2596 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2597 elems.ht_operation = bss_elems.ht_operation;
2599 "AP bug: HT operation missing from AssocResp\n");
2601 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2602 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2603 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2605 "AP bug: VHT capa missing from AssocResp\n");
2607 if (!elems.vht_operation && bss_elems.vht_operation &&
2608 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2609 elems.vht_operation = bss_elems.vht_operation;
2611 "AP bug: VHT operation missing from AssocResp\n");
2616 * We previously checked these in the beacon/probe response, so
2617 * they should be present here. This is just a safety net.
2619 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2620 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2622 "HT AP is missing WMM params or HT capability/operation\n");
2627 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2628 (!elems.vht_cap_elem || !elems.vht_operation)) {
2630 "VHT AP is missing VHT capability/operation\n");
2635 mutex_lock(&sdata->local->sta_mtx);
2637 * station info was already allocated and inserted before
2638 * the association and should be available to us
2640 sta = sta_info_get(sdata, cbss->bssid);
2641 if (WARN_ON(!sta)) {
2642 mutex_unlock(&sdata->local->sta_mtx);
2647 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2649 /* Set up internal HT/VHT capabilities */
2650 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2651 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2652 elems.ht_cap_elem, sta);
2654 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2655 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2656 elems.vht_cap_elem, sta);
2659 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2660 * in their association response, so ignore that data for our own
2661 * configuration. If it changed since the last beacon, we'll get the
2662 * next beacon and update then.
2666 * If an operating mode notification IE is present, override the
2667 * NSS calculation (that would be done in rate_control_rate_init())
2668 * and use the # of streams from that element.
2670 if (elems.opmode_notif &&
2671 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2674 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2675 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2677 sta->sta.rx_nss = nss;
2680 rate_control_rate_init(sta);
2682 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2683 set_sta_flag(sta, WLAN_STA_MFP);
2685 if (elems.wmm_param)
2686 set_sta_flag(sta, WLAN_STA_WME);
2688 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2689 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2690 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2693 "failed to move station %pM to desired state\n",
2695 WARN_ON(__sta_info_destroy(sta));
2696 mutex_unlock(&sdata->local->sta_mtx);
2701 mutex_unlock(&sdata->local->sta_mtx);
2704 * Always handle WMM once after association regardless
2705 * of the first value the AP uses. Setting -1 here has
2706 * that effect because the AP values is an unsigned
2709 ifmgd->wmm_last_param_set = -1;
2711 if (elems.wmm_param)
2712 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2713 elems.wmm_param_len);
2715 ieee80211_set_wmm_default(sdata, false);
2716 changed |= BSS_CHANGED_QOS;
2718 /* set AID and assoc capability,
2719 * ieee80211_set_associated() will tell the driver */
2720 bss_conf->aid = aid;
2721 bss_conf->assoc_capability = capab_info;
2722 ieee80211_set_associated(sdata, cbss, changed);
2725 * If we're using 4-addr mode, let the AP know that we're
2726 * doing so, so that it can create the STA VLAN on its side
2728 if (ifmgd->use_4addr)
2729 ieee80211_send_4addr_nullfunc(local, sdata);
2732 * Start timer to probe the connection to the AP now.
2733 * Also start the timer that will detect beacon loss.
2735 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2736 ieee80211_sta_reset_beacon_monitor(sdata);
2744 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2745 struct ieee80211_mgmt *mgmt,
2748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2749 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2750 u16 capab_info, status_code, aid;
2751 struct ieee802_11_elems elems;
2754 struct cfg80211_bss *bss;
2756 sdata_assert_lock(sdata);
2760 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2764 * AssocResp and ReassocResp have identical structure, so process both
2765 * of them in this function.
2771 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2772 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2773 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2774 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2777 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2778 reassoc ? "Rea" : "A", mgmt->sa,
2779 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2781 pos = mgmt->u.assoc_resp.variable;
2782 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2784 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2785 elems.timeout_int &&
2786 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2788 tu = le32_to_cpu(elems.timeout_int->value);
2789 ms = tu * 1024 / 1000;
2791 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2793 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2794 assoc_data->timeout_started = true;
2795 if (ms > IEEE80211_ASSOC_TIMEOUT)
2796 run_again(sdata, assoc_data->timeout);
2800 bss = assoc_data->bss;
2802 if (status_code != WLAN_STATUS_SUCCESS) {
2803 sdata_info(sdata, "%pM denied association (code=%d)\n",
2804 mgmt->sa, status_code);
2805 ieee80211_destroy_assoc_data(sdata, false);
2807 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2808 /* oops -- internal error -- send timeout for now */
2809 ieee80211_destroy_assoc_data(sdata, false);
2810 cfg80211_assoc_timeout(sdata->dev, bss);
2813 sdata_info(sdata, "associated\n");
2816 * destroy assoc_data afterwards, as otherwise an idle
2817 * recalc after assoc_data is NULL but before associated
2818 * is set can cause the interface to go idle
2820 ieee80211_destroy_assoc_data(sdata, true);
2823 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2826 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2827 struct ieee80211_mgmt *mgmt, size_t len,
2828 struct ieee80211_rx_status *rx_status,
2829 struct ieee802_11_elems *elems)
2831 struct ieee80211_local *local = sdata->local;
2833 struct ieee80211_bss *bss;
2834 struct ieee80211_channel *channel;
2836 sdata_assert_lock(sdata);
2838 if (elems->ds_params)
2839 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2842 freq = rx_status->freq;
2844 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2846 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2849 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2852 ieee80211_rx_bss_put(local, bss);
2853 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2856 if (!sdata->u.mgd.associated ||
2857 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
2860 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2866 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2867 struct sk_buff *skb)
2869 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2870 struct ieee80211_if_managed *ifmgd;
2871 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2872 size_t baselen, len = skb->len;
2873 struct ieee802_11_elems elems;
2875 ifmgd = &sdata->u.mgd;
2877 sdata_assert_lock(sdata);
2879 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2880 return; /* ignore ProbeResp to foreign address */
2882 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2886 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2889 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2891 if (ifmgd->associated &&
2892 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2893 ieee80211_reset_ap_probe(sdata);
2895 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2896 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2897 /* got probe response, continue with auth */
2898 sdata_info(sdata, "direct probe responded\n");
2899 ifmgd->auth_data->tries = 0;
2900 ifmgd->auth_data->timeout = jiffies;
2901 ifmgd->auth_data->timeout_started = true;
2902 run_again(sdata, ifmgd->auth_data->timeout);
2907 * This is the canonical list of information elements we care about,
2908 * the filter code also gives us all changes to the Microsoft OUI
2909 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2911 * We implement beacon filtering in software since that means we can
2912 * avoid processing the frame here and in cfg80211, and userspace
2913 * will not be able to tell whether the hardware supports it or not.
2915 * XXX: This list needs to be dynamic -- userspace needs to be able to
2916 * add items it requires. It also needs to be able to tell us to
2917 * look out for other vendor IEs.
2919 static const u64 care_about_ies =
2920 (1ULL << WLAN_EID_COUNTRY) |
2921 (1ULL << WLAN_EID_ERP_INFO) |
2922 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2923 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2924 (1ULL << WLAN_EID_HT_CAPABILITY) |
2925 (1ULL << WLAN_EID_HT_OPERATION);
2927 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2928 struct ieee80211_mgmt *mgmt, size_t len,
2929 struct ieee80211_rx_status *rx_status)
2931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2932 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2934 struct ieee802_11_elems elems;
2935 struct ieee80211_local *local = sdata->local;
2936 struct ieee80211_chanctx_conf *chanctx_conf;
2937 struct ieee80211_channel *chan;
2938 struct sta_info *sta;
2944 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2946 sdata_assert_lock(sdata);
2948 /* Process beacon from the current BSS */
2949 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2954 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2955 if (!chanctx_conf) {
2960 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2964 chan = chanctx_conf->def.chan;
2967 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2968 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2969 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2970 len - baselen, false, &elems);
2972 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2973 if (elems.tim && !elems.parse_error) {
2974 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2975 ifmgd->dtim_period = tim_ie->dtim_period;
2977 ifmgd->have_beacon = true;
2978 ifmgd->assoc_data->need_beacon = false;
2979 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2980 sdata->vif.bss_conf.sync_tsf =
2981 le64_to_cpu(mgmt->u.beacon.timestamp);
2982 sdata->vif.bss_conf.sync_device_ts =
2983 rx_status->device_timestamp;
2985 sdata->vif.bss_conf.sync_dtim_count =
2986 elems.tim->dtim_count;
2988 sdata->vif.bss_conf.sync_dtim_count = 0;
2990 /* continue assoc process */
2991 ifmgd->assoc_data->timeout = jiffies;
2992 ifmgd->assoc_data->timeout_started = true;
2993 run_again(sdata, ifmgd->assoc_data->timeout);
2997 if (!ifmgd->associated ||
2998 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3000 bssid = ifmgd->associated->bssid;
3002 /* Track average RSSI from the Beacon frames of the current AP */
3003 ifmgd->last_beacon_signal = rx_status->signal;
3004 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3005 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3006 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3007 ifmgd->last_cqm_event_signal = 0;
3008 ifmgd->count_beacon_signal = 1;
3009 ifmgd->last_ave_beacon_signal = 0;
3011 ifmgd->ave_beacon_signal =
3012 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3013 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3014 ifmgd->ave_beacon_signal) / 16;
3015 ifmgd->count_beacon_signal++;
3018 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3019 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3020 int sig = ifmgd->ave_beacon_signal;
3021 int last_sig = ifmgd->last_ave_beacon_signal;
3024 * if signal crosses either of the boundaries, invoke callback
3025 * with appropriate parameters
3027 if (sig > ifmgd->rssi_max_thold &&
3028 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3029 ifmgd->last_ave_beacon_signal = sig;
3030 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3031 } else if (sig < ifmgd->rssi_min_thold &&
3032 (last_sig >= ifmgd->rssi_max_thold ||
3034 ifmgd->last_ave_beacon_signal = sig;
3035 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3039 if (bss_conf->cqm_rssi_thold &&
3040 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3041 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3042 int sig = ifmgd->ave_beacon_signal / 16;
3043 int last_event = ifmgd->last_cqm_event_signal;
3044 int thold = bss_conf->cqm_rssi_thold;
3045 int hyst = bss_conf->cqm_rssi_hyst;
3047 (last_event == 0 || sig < last_event - hyst)) {
3048 ifmgd->last_cqm_event_signal = sig;
3049 ieee80211_cqm_rssi_notify(
3051 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3053 } else if (sig > thold &&
3054 (last_event == 0 || sig > last_event + hyst)) {
3055 ifmgd->last_cqm_event_signal = sig;
3056 ieee80211_cqm_rssi_notify(
3058 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3063 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
3064 mlme_dbg_ratelimited(sdata,
3065 "cancelling AP probe due to a received beacon\n");
3066 mutex_lock(&local->mtx);
3067 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3068 ieee80211_run_deferred_scan(local);
3069 mutex_unlock(&local->mtx);
3071 mutex_lock(&local->iflist_mtx);
3072 ieee80211_recalc_ps(local, -1);
3073 mutex_unlock(&local->iflist_mtx);
3077 * Push the beacon loss detection into the future since
3078 * we are processing a beacon from the AP just now.
3080 ieee80211_sta_reset_beacon_monitor(sdata);
3082 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3083 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3084 len - baselen, false, &elems,
3085 care_about_ies, ncrc);
3087 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3088 bool directed_tim = ieee80211_check_tim(elems.tim,
3092 if (local->hw.conf.dynamic_ps_timeout > 0) {
3093 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3094 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3095 ieee80211_hw_config(local,
3096 IEEE80211_CONF_CHANGE_PS);
3098 ieee80211_send_nullfunc(local, sdata, 0);
3099 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3100 local->pspolling = true;
3103 * Here is assumed that the driver will be
3104 * able to send ps-poll frame and receive a
3105 * response even though power save mode is
3106 * enabled, but some drivers might require
3107 * to disable power save here. This needs
3108 * to be investigated.
3110 ieee80211_send_pspoll(local, sdata);
3115 if (sdata->vif.p2p) {
3116 struct ieee80211_p2p_noa_attr noa = {};
3119 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3121 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3122 (u8 *) &noa, sizeof(noa));
3124 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3125 /* valid noa_attr and index changed */
3126 sdata->u.mgd.p2p_noa_index = noa.index;
3127 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3128 changed |= BSS_CHANGED_P2P_PS;
3130 * make sure we update all information, the CRC
3131 * mechanism doesn't look at P2P attributes.
3133 ifmgd->beacon_crc_valid = false;
3135 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3136 /* noa_attr not found and we had valid noa_attr before */
3137 sdata->u.mgd.p2p_noa_index = -1;
3138 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3139 changed |= BSS_CHANGED_P2P_PS;
3140 ifmgd->beacon_crc_valid = false;
3144 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3146 ifmgd->beacon_crc = ncrc;
3147 ifmgd->beacon_crc_valid = true;
3149 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3151 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3152 elems.wmm_param_len))
3153 changed |= BSS_CHANGED_QOS;
3156 * If we haven't had a beacon before, tell the driver about the
3157 * DTIM period (and beacon timing if desired) now.
3159 if (!ifmgd->have_beacon) {
3160 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3162 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3164 bss_conf->dtim_period = 1;
3166 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3167 sdata->vif.bss_conf.sync_tsf =
3168 le64_to_cpu(mgmt->u.beacon.timestamp);
3169 sdata->vif.bss_conf.sync_device_ts =
3170 rx_status->device_timestamp;
3172 sdata->vif.bss_conf.sync_dtim_count =
3173 elems.tim->dtim_count;
3175 sdata->vif.bss_conf.sync_dtim_count = 0;
3178 changed |= BSS_CHANGED_BEACON_INFO;
3179 ifmgd->have_beacon = true;
3181 mutex_lock(&local->iflist_mtx);
3182 ieee80211_recalc_ps(local, -1);
3183 mutex_unlock(&local->iflist_mtx);
3185 ieee80211_recalc_ps_vif(sdata);
3188 if (elems.erp_info) {
3190 erp_value = elems.erp_info[0];
3194 changed |= ieee80211_handle_bss_capability(sdata,
3195 le16_to_cpu(mgmt->u.beacon.capab_info),
3196 erp_valid, erp_value);
3198 mutex_lock(&local->sta_mtx);
3199 sta = sta_info_get(sdata, bssid);
3201 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3202 elems.vht_operation, bssid, &changed)) {
3203 mutex_unlock(&local->sta_mtx);
3204 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3205 WLAN_REASON_DEAUTH_LEAVING,
3207 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3208 sizeof(deauth_buf));
3212 if (sta && elems.opmode_notif)
3213 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3214 rx_status->band, true);
3215 mutex_unlock(&local->sta_mtx);
3217 if (elems.country_elem && elems.pwr_constr_elem &&
3218 mgmt->u.probe_resp.capab_info &
3219 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3220 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3222 elems.country_elem_len,
3223 elems.pwr_constr_elem);
3225 ieee80211_bss_info_change_notify(sdata, changed);
3228 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3229 struct sk_buff *skb)
3231 struct ieee80211_rx_status *rx_status;
3232 struct ieee80211_mgmt *mgmt;
3234 struct ieee802_11_elems elems;
3237 rx_status = (struct ieee80211_rx_status *) skb->cb;
3238 mgmt = (struct ieee80211_mgmt *) skb->data;
3239 fc = le16_to_cpu(mgmt->frame_control);
3243 switch (fc & IEEE80211_FCTL_STYPE) {
3244 case IEEE80211_STYPE_BEACON:
3245 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3247 case IEEE80211_STYPE_PROBE_RESP:
3248 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3250 case IEEE80211_STYPE_AUTH:
3251 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3253 case IEEE80211_STYPE_DEAUTH:
3254 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3256 case IEEE80211_STYPE_DISASSOC:
3257 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3259 case IEEE80211_STYPE_ASSOC_RESP:
3260 case IEEE80211_STYPE_REASSOC_RESP:
3261 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3263 case IEEE80211_STYPE_ACTION:
3264 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3265 ies_len = skb->len -
3266 offsetof(struct ieee80211_mgmt,
3267 u.action.u.chan_switch.variable);
3272 ieee802_11_parse_elems(
3273 mgmt->u.action.u.chan_switch.variable,
3274 ies_len, true, &elems);
3276 if (elems.parse_error)
3279 ieee80211_sta_process_chanswitch(sdata,
3282 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3283 ies_len = skb->len -
3284 offsetof(struct ieee80211_mgmt,
3285 u.action.u.ext_chan_switch.variable);
3290 ieee802_11_parse_elems(
3291 mgmt->u.action.u.ext_chan_switch.variable,
3292 ies_len, true, &elems);
3294 if (elems.parse_error)
3297 /* for the handling code pretend this was also an IE */
3298 elems.ext_chansw_ie =
3299 &mgmt->u.action.u.ext_chan_switch.data;
3301 ieee80211_sta_process_chanswitch(sdata,
3307 sdata_unlock(sdata);
3310 static void ieee80211_sta_timer(unsigned long data)
3312 struct ieee80211_sub_if_data *sdata =
3313 (struct ieee80211_sub_if_data *) data;
3315 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3318 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3319 u8 *bssid, u8 reason, bool tx)
3321 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3323 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3326 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3327 IEEE80211_DEAUTH_FRAME_LEN);
3330 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3332 struct ieee80211_local *local = sdata->local;
3333 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3334 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3337 sdata_assert_lock(sdata);
3339 if (WARN_ON_ONCE(!auth_data))
3344 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3345 sdata_info(sdata, "authentication with %pM timed out\n",
3346 auth_data->bss->bssid);
3349 * Most likely AP is not in the range so remove the
3350 * bss struct for that AP.
3352 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3357 drv_mgd_prepare_tx(local, sdata);
3359 if (auth_data->bss->proberesp_ies) {
3363 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3364 auth_data->bss->bssid, auth_data->tries,
3365 IEEE80211_AUTH_MAX_TRIES);
3367 auth_data->expected_transaction = 2;
3369 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3370 trans = auth_data->sae_trans;
3371 status = auth_data->sae_status;
3372 auth_data->expected_transaction = trans;
3375 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3376 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3377 IEEE80211_TX_INTFL_MLME_CONN_TX;
3379 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3380 auth_data->data, auth_data->data_len,
3381 auth_data->bss->bssid,
3382 auth_data->bss->bssid, NULL, 0, 0,
3387 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3388 auth_data->bss->bssid, auth_data->tries,
3389 IEEE80211_AUTH_MAX_TRIES);
3392 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3398 * Direct probe is sent to broadcast address as some APs
3399 * will not answer to direct packet in unassociated state.
3401 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3402 NULL, 0, (u32) -1, true, 0,
3403 auth_data->bss->channel, false);
3407 if (tx_flags == 0) {
3408 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3409 auth_data->timeout_started = true;
3410 run_again(sdata, auth_data->timeout);
3412 auth_data->timeout =
3413 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3414 auth_data->timeout_started = true;
3415 run_again(sdata, auth_data->timeout);
3421 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3423 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3424 struct ieee80211_local *local = sdata->local;
3426 sdata_assert_lock(sdata);
3428 assoc_data->tries++;
3429 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3430 sdata_info(sdata, "association with %pM timed out\n",
3431 assoc_data->bss->bssid);
3434 * Most likely AP is not in the range so remove the
3435 * bss struct for that AP.
3437 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3442 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3443 assoc_data->bss->bssid, assoc_data->tries,
3444 IEEE80211_ASSOC_MAX_TRIES);
3445 ieee80211_send_assoc(sdata);
3447 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3448 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3449 assoc_data->timeout_started = true;
3450 run_again(sdata, assoc_data->timeout);
3452 assoc_data->timeout =
3453 round_jiffies_up(jiffies +
3454 IEEE80211_ASSOC_TIMEOUT_LONG);
3455 assoc_data->timeout_started = true;
3456 run_again(sdata, assoc_data->timeout);
3462 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3463 __le16 fc, bool acked)
3465 struct ieee80211_local *local = sdata->local;
3467 sdata->u.mgd.status_fc = fc;
3468 sdata->u.mgd.status_acked = acked;
3469 sdata->u.mgd.status_received = true;
3471 ieee80211_queue_work(&local->hw, &sdata->work);
3474 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3476 struct ieee80211_local *local = sdata->local;
3477 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3481 if (ifmgd->status_received) {
3482 __le16 fc = ifmgd->status_fc;
3483 bool status_acked = ifmgd->status_acked;
3485 ifmgd->status_received = false;
3486 if (ifmgd->auth_data &&
3487 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3489 ifmgd->auth_data->timeout =
3490 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3491 run_again(sdata, ifmgd->auth_data->timeout);
3493 ifmgd->auth_data->timeout = jiffies - 1;
3495 ifmgd->auth_data->timeout_started = true;
3496 } else if (ifmgd->assoc_data &&
3497 (ieee80211_is_assoc_req(fc) ||
3498 ieee80211_is_reassoc_req(fc))) {
3500 ifmgd->assoc_data->timeout =
3501 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3502 run_again(sdata, ifmgd->assoc_data->timeout);
3504 ifmgd->assoc_data->timeout = jiffies - 1;
3506 ifmgd->assoc_data->timeout_started = true;
3510 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3511 time_after(jiffies, ifmgd->auth_data->timeout)) {
3512 if (ifmgd->auth_data->done) {
3514 * ok ... we waited for assoc but userspace didn't,
3515 * so let's just kill the auth data
3517 ieee80211_destroy_auth_data(sdata, false);
3518 } else if (ieee80211_probe_auth(sdata)) {
3521 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3523 ieee80211_destroy_auth_data(sdata, false);
3525 cfg80211_auth_timeout(sdata->dev, bssid);
3527 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3528 run_again(sdata, ifmgd->auth_data->timeout);
3530 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3531 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3532 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3533 ieee80211_do_assoc(sdata)) {
3534 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3536 ieee80211_destroy_assoc_data(sdata, false);
3537 cfg80211_assoc_timeout(sdata->dev, bss);
3539 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3540 run_again(sdata, ifmgd->assoc_data->timeout);
3542 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3543 IEEE80211_STA_CONNECTION_POLL) &&
3544 ifmgd->associated) {
3548 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3550 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3551 max_tries = max_nullfunc_tries;
3553 max_tries = max_probe_tries;
3555 /* ACK received for nullfunc probing frame */
3556 if (!ifmgd->probe_send_count)
3557 ieee80211_reset_ap_probe(sdata);
3558 else if (ifmgd->nullfunc_failed) {
3559 if (ifmgd->probe_send_count < max_tries) {
3561 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3562 bssid, ifmgd->probe_send_count,
3564 ieee80211_mgd_probe_ap_send(sdata);
3567 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3569 ieee80211_sta_connection_lost(sdata, bssid,
3570 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3573 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3574 run_again(sdata, ifmgd->probe_timeout);
3575 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3577 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3578 bssid, probe_wait_ms);
3579 ieee80211_sta_connection_lost(sdata, bssid,
3580 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3581 } else if (ifmgd->probe_send_count < max_tries) {
3583 "No probe response from AP %pM after %dms, try %d/%i\n",
3584 bssid, probe_wait_ms,
3585 ifmgd->probe_send_count, max_tries);
3586 ieee80211_mgd_probe_ap_send(sdata);
3589 * We actually lost the connection ... or did we?
3592 wiphy_debug(local->hw.wiphy,
3593 "%s: No probe response from AP %pM"
3594 " after %dms, disconnecting.\n",
3596 bssid, probe_wait_ms);
3598 ieee80211_sta_connection_lost(sdata, bssid,
3599 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3603 sdata_unlock(sdata);
3606 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3608 struct ieee80211_sub_if_data *sdata =
3609 (struct ieee80211_sub_if_data *) data;
3610 struct ieee80211_local *local = sdata->local;
3612 if (local->quiescing)
3615 sdata->u.mgd.connection_loss = false;
3616 ieee80211_queue_work(&sdata->local->hw,
3617 &sdata->u.mgd.beacon_connection_loss_work);
3620 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3622 struct ieee80211_sub_if_data *sdata =
3623 (struct ieee80211_sub_if_data *) data;
3624 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3625 struct ieee80211_local *local = sdata->local;
3627 if (local->quiescing)
3630 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3633 static void ieee80211_sta_monitor_work(struct work_struct *work)
3635 struct ieee80211_sub_if_data *sdata =
3636 container_of(work, struct ieee80211_sub_if_data,
3637 u.mgd.monitor_work);
3639 ieee80211_mgd_probe_ap(sdata, false);
3642 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3646 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3647 __ieee80211_stop_poll(sdata);
3649 /* let's probe the connection once */
3650 flags = sdata->local->hw.flags;
3651 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3652 ieee80211_queue_work(&sdata->local->hw,
3653 &sdata->u.mgd.monitor_work);
3654 /* and do all the other regular work too */
3655 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3660 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3662 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3665 if (!ifmgd->associated) {
3666 sdata_unlock(sdata);
3670 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3671 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3672 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3673 ieee80211_sta_connection_lost(sdata,
3674 ifmgd->associated->bssid,
3675 WLAN_REASON_UNSPECIFIED,
3677 sdata_unlock(sdata);
3680 sdata_unlock(sdata);
3684 /* interface setup */
3685 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3687 struct ieee80211_if_managed *ifmgd;
3689 ifmgd = &sdata->u.mgd;
3690 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3691 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3692 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3693 ieee80211_beacon_connection_loss_work);
3694 INIT_WORK(&ifmgd->csa_connection_drop_work,
3695 ieee80211_csa_connection_drop_work);
3696 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3697 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3698 (unsigned long) sdata);
3699 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3700 (unsigned long) sdata);
3701 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3702 (unsigned long) sdata);
3703 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3704 (unsigned long) sdata);
3707 ifmgd->powersave = sdata->wdev.ps;
3708 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3709 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3710 ifmgd->p2p_noa_index = -1;
3712 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3713 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3715 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3718 /* scan finished notification */
3719 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3721 struct ieee80211_sub_if_data *sdata;
3723 /* Restart STA timers */
3725 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3726 if (ieee80211_sdata_running(sdata))
3727 ieee80211_restart_sta_timer(sdata);
3732 int ieee80211_max_network_latency(struct notifier_block *nb,
3733 unsigned long data, void *dummy)
3735 s32 latency_usec = (s32) data;
3736 struct ieee80211_local *local =
3737 container_of(nb, struct ieee80211_local,
3738 network_latency_notifier);
3740 mutex_lock(&local->iflist_mtx);
3741 ieee80211_recalc_ps(local, latency_usec);
3742 mutex_unlock(&local->iflist_mtx);
3747 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3748 struct cfg80211_bss *cbss)
3750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3751 const u8 *ht_cap_ie, *vht_cap_ie;
3752 const struct ieee80211_ht_cap *ht_cap;
3753 const struct ieee80211_vht_cap *vht_cap;
3756 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3759 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3760 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3761 ht_cap = (void *)(ht_cap_ie + 2);
3762 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3764 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3765 * "Tx Unequal Modulation Supported" fields.
3769 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3772 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3773 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3777 vht_cap = (void *)(vht_cap_ie + 2);
3778 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3779 for (nss = 8; nss > 0; nss--) {
3780 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3781 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3784 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3785 chains = max(chains, nss);
3791 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3792 struct cfg80211_bss *cbss)
3794 struct ieee80211_local *local = sdata->local;
3795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3796 const struct ieee80211_ht_operation *ht_oper = NULL;
3797 const struct ieee80211_vht_operation *vht_oper = NULL;
3798 struct ieee80211_supported_band *sband;
3799 struct cfg80211_chan_def chandef;
3802 sband = local->hw.wiphy->bands[cbss->channel->band];
3804 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3805 IEEE80211_STA_DISABLE_80P80MHZ |
3806 IEEE80211_STA_DISABLE_160MHZ);
3810 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3811 sband->ht_cap.ht_supported) {
3812 const u8 *ht_oper_ie, *ht_cap;
3814 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3815 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3816 ht_oper = (void *)(ht_oper_ie + 2);
3818 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3819 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3820 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3825 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3826 sband->vht_cap.vht_supported) {
3827 const u8 *vht_oper_ie, *vht_cap;
3829 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3830 WLAN_EID_VHT_OPERATION);
3831 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3832 vht_oper = (void *)(vht_oper_ie + 2);
3833 if (vht_oper && !ht_oper) {
3836 "AP advertised VHT without HT, disabling both\n");
3837 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3838 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3841 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3842 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3843 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3848 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3853 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3858 /* will change later if needed */
3859 sdata->smps_mode = IEEE80211_SMPS_OFF;
3862 * If this fails (possibly due to channel context sharing
3863 * on incompatible channels, e.g. 80+80 and 160 sharing the
3864 * same control channel) try to use a smaller bandwidth.
3866 ret = ieee80211_vif_use_channel(sdata, &chandef,
3867 IEEE80211_CHANCTX_SHARED);
3869 /* don't downgrade for 5 and 10 MHz channels, though. */
3870 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3871 chandef.width == NL80211_CHAN_WIDTH_10)
3874 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3875 ifmgd->flags |= chandef_downgrade(&chandef);
3876 ret = ieee80211_vif_use_channel(sdata, &chandef,
3877 IEEE80211_CHANCTX_SHARED);
3882 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3883 struct cfg80211_bss *cbss, bool assoc)
3885 struct ieee80211_local *local = sdata->local;
3886 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3887 struct ieee80211_bss *bss = (void *)cbss->priv;
3888 struct sta_info *new_sta = NULL;
3889 bool have_sta = false;
3892 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3897 have_sta = sta_info_get(sdata, cbss->bssid);
3902 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3907 u32 rates = 0, basic_rates = 0;
3908 bool have_higher_than_11mbit;
3909 int min_rate = INT_MAX, min_rate_index = -1;
3910 struct ieee80211_chanctx_conf *chanctx_conf;
3911 struct ieee80211_supported_band *sband;
3912 const struct cfg80211_bss_ies *ies;
3916 sband = local->hw.wiphy->bands[cbss->channel->band];
3918 err = ieee80211_prep_channel(sdata, cbss);
3920 sta_info_free(local, new_sta);
3923 shift = ieee80211_vif_get_shift(&sdata->vif);
3926 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3927 if (WARN_ON(!chanctx_conf)) {
3931 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3934 ieee80211_get_rates(sband, bss->supp_rates,
3935 bss->supp_rates_len,
3936 &rates, &basic_rates,
3937 &have_higher_than_11mbit,
3938 &min_rate, &min_rate_index,
3942 * This used to be a workaround for basic rates missing
3943 * in the association response frame. Now that we no
3944 * longer use the basic rates from there, it probably
3945 * doesn't happen any more, but keep the workaround so
3946 * in case some *other* APs are buggy in different ways
3947 * we can connect -- with a warning.
3949 if (!basic_rates && min_rate_index >= 0) {
3951 "No basic rates, using min rate instead\n");
3952 basic_rates = BIT(min_rate_index);
3955 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3956 sdata->vif.bss_conf.basic_rates = basic_rates;
3958 /* cf. IEEE 802.11 9.2.12 */
3959 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3960 have_higher_than_11mbit)
3961 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3963 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3965 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3967 /* set timing information */
3968 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3970 ies = rcu_dereference(cbss->beacon_ies);
3974 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3975 sdata->vif.bss_conf.sync_device_ts =
3976 bss->device_ts_beacon;
3977 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3978 ies->data, ies->len);
3979 if (tim_ie && tim_ie[1] >= 2)
3980 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3982 sdata->vif.bss_conf.sync_dtim_count = 0;
3983 } else if (!(local->hw.flags &
3984 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3985 ies = rcu_dereference(cbss->proberesp_ies);
3986 /* must be non-NULL since beacon IEs were NULL */
3987 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3988 sdata->vif.bss_conf.sync_device_ts =
3989 bss->device_ts_presp;
3990 sdata->vif.bss_conf.sync_dtim_count = 0;
3992 sdata->vif.bss_conf.sync_tsf = 0;
3993 sdata->vif.bss_conf.sync_device_ts = 0;
3994 sdata->vif.bss_conf.sync_dtim_count = 0;
3998 /* tell driver about BSSID, basic rates and timing */
3999 ieee80211_bss_info_change_notify(sdata,
4000 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4001 BSS_CHANGED_BEACON_INT);
4004 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4006 err = sta_info_insert(new_sta);
4010 "failed to insert STA entry for the AP (error %d)\n",
4015 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4021 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4022 struct cfg80211_auth_request *req)
4024 struct ieee80211_local *local = sdata->local;
4025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4026 struct ieee80211_mgd_auth_data *auth_data;
4030 /* prepare auth data structure */
4032 switch (req->auth_type) {
4033 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4034 auth_alg = WLAN_AUTH_OPEN;
4036 case NL80211_AUTHTYPE_SHARED_KEY:
4037 if (IS_ERR(local->wep_tx_tfm))
4039 auth_alg = WLAN_AUTH_SHARED_KEY;
4041 case NL80211_AUTHTYPE_FT:
4042 auth_alg = WLAN_AUTH_FT;
4044 case NL80211_AUTHTYPE_NETWORK_EAP:
4045 auth_alg = WLAN_AUTH_LEAP;
4047 case NL80211_AUTHTYPE_SAE:
4048 auth_alg = WLAN_AUTH_SAE;
4054 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4055 req->ie_len, GFP_KERNEL);
4059 auth_data->bss = req->bss;
4061 if (req->sae_data_len >= 4) {
4062 __le16 *pos = (__le16 *) req->sae_data;
4063 auth_data->sae_trans = le16_to_cpu(pos[0]);
4064 auth_data->sae_status = le16_to_cpu(pos[1]);
4065 memcpy(auth_data->data, req->sae_data + 4,
4066 req->sae_data_len - 4);
4067 auth_data->data_len += req->sae_data_len - 4;
4070 if (req->ie && req->ie_len) {
4071 memcpy(&auth_data->data[auth_data->data_len],
4072 req->ie, req->ie_len);
4073 auth_data->data_len += req->ie_len;
4076 if (req->key && req->key_len) {
4077 auth_data->key_len = req->key_len;
4078 auth_data->key_idx = req->key_idx;
4079 memcpy(auth_data->key, req->key, req->key_len);
4082 auth_data->algorithm = auth_alg;
4084 /* try to authenticate/probe */
4086 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4087 ifmgd->assoc_data) {
4092 if (ifmgd->auth_data)
4093 ieee80211_destroy_auth_data(sdata, false);
4095 /* prep auth_data so we don't go into idle on disassoc */
4096 ifmgd->auth_data = auth_data;
4098 if (ifmgd->associated) {
4099 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4101 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4102 WLAN_REASON_UNSPECIFIED,
4105 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4109 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4111 err = ieee80211_prep_connection(sdata, req->bss, false);
4115 err = ieee80211_probe_auth(sdata);
4117 sta_info_destroy_addr(sdata, req->bss->bssid);
4121 /* hold our own reference */
4122 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4126 memset(ifmgd->bssid, 0, ETH_ALEN);
4127 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4128 ifmgd->auth_data = NULL;
4134 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4135 struct cfg80211_assoc_request *req)
4137 struct ieee80211_local *local = sdata->local;
4138 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4139 struct ieee80211_bss *bss = (void *)req->bss->priv;
4140 struct ieee80211_mgd_assoc_data *assoc_data;
4141 const struct cfg80211_bss_ies *beacon_ies;
4142 struct ieee80211_supported_band *sband;
4143 const u8 *ssidie, *ht_ie, *vht_ie;
4146 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4151 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4157 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4158 assoc_data->ssid_len = ssidie[1];
4161 if (ifmgd->associated) {
4162 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4164 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4165 WLAN_REASON_UNSPECIFIED,
4168 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4172 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4177 if (ifmgd->assoc_data) {
4182 if (ifmgd->auth_data) {
4185 /* keep sta info, bssid if matching */
4186 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4187 ieee80211_destroy_auth_data(sdata, match);
4190 /* prepare assoc data */
4192 ifmgd->beacon_crc_valid = false;
4195 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4196 * We still associate in non-HT mode (11a/b/g) if any one of these
4197 * ciphers is configured as pairwise.
4198 * We can set this to true for non-11n hardware, that'll be checked
4199 * separately along with the peer capabilities.
4201 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4202 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4203 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4204 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4205 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4206 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4207 netdev_info(sdata->dev,
4208 "disabling HT/VHT due to WEP/TKIP use\n");
4212 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4213 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4214 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4217 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4218 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4220 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4221 sband = local->hw.wiphy->bands[req->bss->channel->band];
4222 if (!sband->ht_cap.ht_supported ||
4223 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4224 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4226 netdev_info(sdata->dev,
4227 "disabling HT as WMM/QoS is not supported by the AP\n");
4230 /* disable VHT if we don't support it or the AP doesn't use WMM */
4231 if (!sband->vht_cap.vht_supported ||
4232 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4233 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4235 netdev_info(sdata->dev,
4236 "disabling VHT as WMM/QoS is not supported by the AP\n");
4239 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4240 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4241 sizeof(ifmgd->ht_capa_mask));
4243 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4244 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4245 sizeof(ifmgd->vht_capa_mask));
4247 if (req->ie && req->ie_len) {
4248 memcpy(assoc_data->ie, req->ie, req->ie_len);
4249 assoc_data->ie_len = req->ie_len;
4252 assoc_data->bss = req->bss;
4254 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4255 if (ifmgd->powersave)
4256 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4258 sdata->smps_mode = IEEE80211_SMPS_OFF;
4260 sdata->smps_mode = ifmgd->req_smps;
4262 assoc_data->capability = req->bss->capability;
4263 assoc_data->wmm = bss->wmm_used &&
4264 (local->hw.queues >= IEEE80211_NUM_ACS);
4265 assoc_data->supp_rates = bss->supp_rates;
4266 assoc_data->supp_rates_len = bss->supp_rates_len;
4269 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4270 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4271 assoc_data->ap_ht_param =
4272 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4274 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4275 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4276 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4277 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4278 sizeof(struct ieee80211_vht_cap));
4280 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4283 if (bss->wmm_used && bss->uapsd_supported &&
4284 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4285 sdata->wmm_acm != 0xff) {
4286 assoc_data->uapsd = true;
4287 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4289 assoc_data->uapsd = false;
4290 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4293 if (req->prev_bssid)
4294 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4297 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4298 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4300 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4301 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4304 if (req->crypto.control_port)
4305 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4307 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4309 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4310 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4312 /* kick off associate process */
4314 ifmgd->assoc_data = assoc_data;
4315 ifmgd->dtim_period = 0;
4316 ifmgd->have_beacon = false;
4318 err = ieee80211_prep_connection(sdata, req->bss, true);
4323 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4325 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4328 * Wait up to one beacon interval ...
4329 * should this be more if we miss one?
4331 sdata_info(sdata, "waiting for beacon from %pM\n",
4333 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4334 assoc_data->timeout_started = true;
4335 assoc_data->need_beacon = true;
4336 } else if (beacon_ies) {
4337 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4342 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4343 const struct ieee80211_tim_ie *tim;
4344 tim = (void *)(tim_ie + 2);
4345 ifmgd->dtim_period = tim->dtim_period;
4346 dtim_count = tim->dtim_count;
4348 ifmgd->have_beacon = true;
4349 assoc_data->timeout = jiffies;
4350 assoc_data->timeout_started = true;
4352 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4353 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4354 sdata->vif.bss_conf.sync_device_ts =
4355 bss->device_ts_beacon;
4356 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4359 assoc_data->timeout = jiffies;
4360 assoc_data->timeout_started = true;
4364 run_again(sdata, assoc_data->timeout);
4366 if (bss->corrupt_data) {
4367 char *corrupt_type = "data";
4368 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4369 if (bss->corrupt_data &
4370 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4371 corrupt_type = "beacon and probe response";
4373 corrupt_type = "beacon";
4374 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4375 corrupt_type = "probe response";
4376 sdata_info(sdata, "associating with AP with corrupt %s\n",
4382 memset(ifmgd->bssid, 0, ETH_ALEN);
4383 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4384 ifmgd->assoc_data = NULL;
4390 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4391 struct cfg80211_deauth_request *req)
4393 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4394 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4395 bool tx = !req->local_state_change;
4396 bool report_frame = false;
4399 "deauthenticating from %pM by local choice (reason=%d)\n",
4400 req->bssid, req->reason_code);
4402 if (ifmgd->auth_data) {
4403 drv_mgd_prepare_tx(sdata->local, sdata);
4404 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4405 IEEE80211_STYPE_DEAUTH,
4406 req->reason_code, tx,
4408 ieee80211_destroy_auth_data(sdata, false);
4410 report_frame = true;
4414 if (ifmgd->associated &&
4415 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4416 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4417 req->reason_code, tx, frame_buf);
4418 report_frame = true;
4423 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4424 IEEE80211_DEAUTH_FRAME_LEN);
4429 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4430 struct cfg80211_disassoc_request *req)
4432 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4434 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4437 * cfg80211 should catch this ... but it's racy since
4438 * we can receive a disassoc frame, process it, hand it
4439 * to cfg80211 while that's in a locked section already
4440 * trying to tell us that the user wants to disconnect.
4442 if (ifmgd->associated != req->bss)
4446 "disassociating from %pM by local choice (reason=%d)\n",
4447 req->bss->bssid, req->reason_code);
4449 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4450 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4451 req->reason_code, !req->local_state_change,
4454 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4455 IEEE80211_DEAUTH_FRAME_LEN);
4460 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4462 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4465 * Make sure some work items will not run after this,
4466 * they will not do anything but might not have been
4467 * cancelled when disconnecting.
4469 cancel_work_sync(&ifmgd->monitor_work);
4470 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4471 cancel_work_sync(&ifmgd->request_smps_work);
4472 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4473 cancel_work_sync(&ifmgd->chswitch_work);
4476 if (ifmgd->assoc_data) {
4477 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4478 ieee80211_destroy_assoc_data(sdata, false);
4479 cfg80211_assoc_timeout(sdata->dev, bss);
4481 if (ifmgd->auth_data)
4482 ieee80211_destroy_auth_data(sdata, false);
4483 del_timer_sync(&ifmgd->timer);
4484 sdata_unlock(sdata);
4487 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4488 enum nl80211_cqm_rssi_threshold_event rssi_event,
4491 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4493 trace_api_cqm_rssi_notify(sdata, rssi_event);
4495 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4497 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);