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);
1116 /* keep width for 5/10 MHz channels */
1117 switch (sdata->vif.bss_conf.chandef.width) {
1118 case NL80211_CHAN_WIDTH_5:
1119 case NL80211_CHAN_WIDTH_10:
1120 new_chandef.width = sdata->vif.bss_conf.chandef.width;
1128 if (wide_bw_chansw_ie) {
1129 new_vht_chandef.chan = new_chan;
1130 new_vht_chandef.center_freq1 =
1131 ieee80211_channel_to_frequency(
1132 wide_bw_chansw_ie->new_center_freq_seg0,
1135 switch (wide_bw_chansw_ie->new_channel_width) {
1137 /* hmmm, ignore VHT and use HT if present */
1138 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1139 new_vht_chandef.chan = NULL;
1141 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1142 new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1144 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1145 new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1147 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1148 /* field is otherwise reserved */
1149 new_vht_chandef.center_freq2 =
1150 ieee80211_channel_to_frequency(
1151 wide_bw_chansw_ie->new_center_freq_seg1,
1153 new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1156 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1157 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1158 chandef_downgrade(&new_vht_chandef);
1159 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1160 new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1161 chandef_downgrade(&new_vht_chandef);
1162 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1163 new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1164 chandef_downgrade(&new_vht_chandef);
1167 /* if VHT data is there validate & use it */
1168 if (new_vht_chandef.chan) {
1169 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1172 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1173 ifmgd->associated->bssid);
1174 ieee80211_queue_work(&local->hw,
1175 &ifmgd->csa_connection_drop_work);
1178 new_chandef = new_vht_chandef;
1181 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1182 IEEE80211_CHAN_DISABLED)) {
1184 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1185 ifmgd->associated->bssid, new_freq,
1186 new_chandef.width, new_chandef.center_freq1,
1187 new_chandef.center_freq2);
1188 ieee80211_queue_work(&local->hw,
1189 &ifmgd->csa_connection_drop_work);
1193 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1195 if (local->use_chanctx) {
1197 "not handling channel switch with channel contexts\n");
1198 ieee80211_queue_work(&local->hw,
1199 &ifmgd->csa_connection_drop_work);
1203 mutex_lock(&local->chanctx_mtx);
1204 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1205 mutex_unlock(&local->chanctx_mtx);
1208 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1209 struct ieee80211_chanctx, conf);
1210 if (chanctx->refcount > 1) {
1212 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1213 ieee80211_queue_work(&local->hw,
1214 &ifmgd->csa_connection_drop_work);
1215 mutex_unlock(&local->chanctx_mtx);
1218 mutex_unlock(&local->chanctx_mtx);
1220 local->csa_chandef = new_chandef;
1223 ieee80211_stop_queues_by_reason(&local->hw,
1224 IEEE80211_MAX_QUEUE_MAP,
1225 IEEE80211_QUEUE_STOP_REASON_CSA);
1227 if (local->ops->channel_switch) {
1228 /* use driver's channel switch callback */
1229 struct ieee80211_channel_switch ch_switch = {
1230 .timestamp = timestamp,
1232 .chandef = new_chandef,
1236 drv_channel_switch(local, &ch_switch);
1240 /* channel switch handled in software */
1242 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1244 mod_timer(&ifmgd->chswitch_timer,
1245 TU_TO_EXP_TIME(count * cbss->beacon_interval));
1248 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1249 struct ieee80211_channel *channel,
1250 const u8 *country_ie, u8 country_ie_len,
1251 const u8 *pwr_constr_elem)
1253 struct ieee80211_country_ie_triplet *triplet;
1254 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1255 int i, chan_pwr, chan_increment, new_ap_level;
1256 bool have_chan_pwr = false;
1259 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1262 triplet = (void *)(country_ie + 3);
1263 country_ie_len -= 3;
1265 switch (channel->band) {
1269 case IEEE80211_BAND_2GHZ:
1270 case IEEE80211_BAND_60GHZ:
1273 case IEEE80211_BAND_5GHZ:
1279 while (country_ie_len >= 3) {
1280 u8 first_channel = triplet->chans.first_channel;
1282 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1285 for (i = 0; i < triplet->chans.num_channels; i++) {
1286 if (first_channel + i * chan_increment == chan) {
1287 have_chan_pwr = true;
1288 chan_pwr = triplet->chans.max_power;
1297 country_ie_len -= 3;
1303 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1305 if (sdata->ap_power_level == new_ap_level)
1309 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1310 new_ap_level, chan_pwr, *pwr_constr_elem,
1311 sdata->u.mgd.bssid);
1312 sdata->ap_power_level = new_ap_level;
1313 if (__ieee80211_recalc_txpower(sdata))
1314 return BSS_CHANGED_TXPOWER;
1319 static void ieee80211_enable_ps(struct ieee80211_local *local,
1320 struct ieee80211_sub_if_data *sdata)
1322 struct ieee80211_conf *conf = &local->hw.conf;
1325 * If we are scanning right now then the parameters will
1326 * take effect when scan finishes.
1328 if (local->scanning)
1331 if (conf->dynamic_ps_timeout > 0 &&
1332 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1333 mod_timer(&local->dynamic_ps_timer, jiffies +
1334 msecs_to_jiffies(conf->dynamic_ps_timeout));
1336 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1337 ieee80211_send_nullfunc(local, sdata, 1);
1339 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1340 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1343 conf->flags |= IEEE80211_CONF_PS;
1344 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1348 static void ieee80211_change_ps(struct ieee80211_local *local)
1350 struct ieee80211_conf *conf = &local->hw.conf;
1352 if (local->ps_sdata) {
1353 ieee80211_enable_ps(local, local->ps_sdata);
1354 } else if (conf->flags & IEEE80211_CONF_PS) {
1355 conf->flags &= ~IEEE80211_CONF_PS;
1356 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1357 del_timer_sync(&local->dynamic_ps_timer);
1358 cancel_work_sync(&local->dynamic_ps_enable_work);
1362 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1364 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1365 struct sta_info *sta = NULL;
1366 bool authorized = false;
1368 if (!mgd->powersave)
1374 if (!mgd->associated)
1377 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1378 IEEE80211_STA_CONNECTION_POLL))
1381 if (!mgd->have_beacon)
1385 sta = sta_info_get(sdata, mgd->bssid);
1387 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1393 /* need to hold RTNL or interface lock */
1394 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1396 struct ieee80211_sub_if_data *sdata, *found = NULL;
1400 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1401 local->ps_sdata = NULL;
1405 list_for_each_entry(sdata, &local->interfaces, list) {
1406 if (!ieee80211_sdata_running(sdata))
1408 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1409 /* If an AP vif is found, then disable PS
1410 * by setting the count to zero thereby setting
1416 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1422 if (count == 1 && ieee80211_powersave_allowed(found)) {
1426 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1428 beaconint_us = ieee80211_tu_to_usec(
1429 found->vif.bss_conf.beacon_int);
1431 timeout = local->dynamic_ps_forced_timeout;
1434 * Go to full PSM if the user configures a very low
1435 * latency requirement.
1436 * The 2000 second value is there for compatibility
1437 * until the PM_QOS_NETWORK_LATENCY is configured
1440 if (latency > (1900 * USEC_PER_MSEC) &&
1441 latency != (2000 * USEC_PER_SEC))
1446 local->hw.conf.dynamic_ps_timeout = timeout;
1448 if (beaconint_us > latency) {
1449 local->ps_sdata = NULL;
1452 u8 dtimper = found->u.mgd.dtim_period;
1454 /* If the TIM IE is invalid, pretend the value is 1 */
1457 else if (dtimper > 1)
1458 maxslp = min_t(int, dtimper,
1459 latency / beaconint_us);
1461 local->hw.conf.max_sleep_period = maxslp;
1462 local->hw.conf.ps_dtim_period = dtimper;
1463 local->ps_sdata = found;
1466 local->ps_sdata = NULL;
1469 ieee80211_change_ps(local);
1472 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1474 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1476 if (sdata->vif.bss_conf.ps != ps_allowed) {
1477 sdata->vif.bss_conf.ps = ps_allowed;
1478 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1482 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1484 struct ieee80211_local *local =
1485 container_of(work, struct ieee80211_local,
1486 dynamic_ps_disable_work);
1488 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1489 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1490 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1493 ieee80211_wake_queues_by_reason(&local->hw,
1494 IEEE80211_MAX_QUEUE_MAP,
1495 IEEE80211_QUEUE_STOP_REASON_PS);
1498 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1500 struct ieee80211_local *local =
1501 container_of(work, struct ieee80211_local,
1502 dynamic_ps_enable_work);
1503 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1504 struct ieee80211_if_managed *ifmgd;
1505 unsigned long flags;
1508 /* can only happen when PS was just disabled anyway */
1512 ifmgd = &sdata->u.mgd;
1514 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1517 if (local->hw.conf.dynamic_ps_timeout > 0) {
1518 /* don't enter PS if TX frames are pending */
1519 if (drv_tx_frames_pending(local)) {
1520 mod_timer(&local->dynamic_ps_timer, jiffies +
1522 local->hw.conf.dynamic_ps_timeout));
1527 * transmission can be stopped by others which leads to
1528 * dynamic_ps_timer expiry. Postpone the ps timer if it
1529 * is not the actual idle state.
1531 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1532 for (q = 0; q < local->hw.queues; q++) {
1533 if (local->queue_stop_reasons[q]) {
1534 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1536 mod_timer(&local->dynamic_ps_timer, jiffies +
1538 local->hw.conf.dynamic_ps_timeout));
1542 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1545 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1546 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1547 if (drv_tx_frames_pending(local)) {
1548 mod_timer(&local->dynamic_ps_timer, jiffies +
1550 local->hw.conf.dynamic_ps_timeout));
1552 ieee80211_send_nullfunc(local, sdata, 1);
1553 /* Flush to get the tx status of nullfunc frame */
1554 ieee80211_flush_queues(local, sdata);
1558 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1559 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1560 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1561 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1562 local->hw.conf.flags |= IEEE80211_CONF_PS;
1563 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1567 void ieee80211_dynamic_ps_timer(unsigned long data)
1569 struct ieee80211_local *local = (void *) data;
1571 if (local->quiescing || local->suspended)
1574 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1577 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1579 struct delayed_work *delayed_work =
1580 container_of(work, struct delayed_work, work);
1581 struct ieee80211_sub_if_data *sdata =
1582 container_of(delayed_work, struct ieee80211_sub_if_data,
1583 dfs_cac_timer_work);
1585 ieee80211_vif_release_channel(sdata);
1587 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1591 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1592 struct ieee80211_sub_if_data *sdata,
1593 const u8 *wmm_param, size_t wmm_param_len)
1595 struct ieee80211_tx_queue_params params;
1596 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1600 u8 uapsd_queues = 0;
1602 if (!local->ops->conf_tx)
1605 if (local->hw.queues < IEEE80211_NUM_ACS)
1611 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1614 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1615 uapsd_queues = ifmgd->uapsd_queues;
1617 count = wmm_param[6] & 0x0f;
1618 if (count == ifmgd->wmm_last_param_set)
1620 ifmgd->wmm_last_param_set = count;
1622 pos = wmm_param + 8;
1623 left = wmm_param_len - 8;
1625 memset(¶ms, 0, sizeof(params));
1628 for (; left >= 4; left -= 4, pos += 4) {
1629 int aci = (pos[0] >> 5) & 0x03;
1630 int acm = (pos[0] >> 4) & 0x01;
1638 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1639 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1645 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1646 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1652 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1653 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1660 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1661 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1666 params.aifs = pos[0] & 0x0f;
1667 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1668 params.cw_min = ecw2cw(pos[1] & 0x0f);
1669 params.txop = get_unaligned_le16(pos + 2);
1671 params.uapsd = uapsd;
1674 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1676 params.aifs, params.cw_min, params.cw_max,
1677 params.txop, params.uapsd);
1678 sdata->tx_conf[queue] = params;
1679 if (drv_conf_tx(local, sdata, queue, ¶ms))
1681 "failed to set TX queue parameters for queue %d\n",
1685 /* enable WMM or activate new settings */
1686 sdata->vif.bss_conf.qos = true;
1690 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1692 lockdep_assert_held(&sdata->local->mtx);
1694 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1695 IEEE80211_STA_BEACON_POLL);
1696 ieee80211_run_deferred_scan(sdata->local);
1699 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1701 mutex_lock(&sdata->local->mtx);
1702 __ieee80211_stop_poll(sdata);
1703 mutex_unlock(&sdata->local->mtx);
1706 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1707 u16 capab, bool erp_valid, u8 erp)
1709 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1711 bool use_protection;
1712 bool use_short_preamble;
1713 bool use_short_slot;
1716 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1717 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1719 use_protection = false;
1720 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1723 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1724 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1725 use_short_slot = true;
1727 if (use_protection != bss_conf->use_cts_prot) {
1728 bss_conf->use_cts_prot = use_protection;
1729 changed |= BSS_CHANGED_ERP_CTS_PROT;
1732 if (use_short_preamble != bss_conf->use_short_preamble) {
1733 bss_conf->use_short_preamble = use_short_preamble;
1734 changed |= BSS_CHANGED_ERP_PREAMBLE;
1737 if (use_short_slot != bss_conf->use_short_slot) {
1738 bss_conf->use_short_slot = use_short_slot;
1739 changed |= BSS_CHANGED_ERP_SLOT;
1745 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1746 struct cfg80211_bss *cbss,
1747 u32 bss_info_changed)
1749 struct ieee80211_bss *bss = (void *)cbss->priv;
1750 struct ieee80211_local *local = sdata->local;
1751 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1753 bss_info_changed |= BSS_CHANGED_ASSOC;
1754 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1755 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1757 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1758 beacon_loss_count * bss_conf->beacon_int));
1760 sdata->u.mgd.associated = cbss;
1761 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1763 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1765 if (sdata->vif.p2p) {
1766 const struct cfg80211_bss_ies *ies;
1769 ies = rcu_dereference(cbss->ies);
1773 ret = cfg80211_get_p2p_attr(
1774 ies->data, ies->len,
1775 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1776 (u8 *) &bss_conf->p2p_noa_attr,
1777 sizeof(bss_conf->p2p_noa_attr));
1779 sdata->u.mgd.p2p_noa_index =
1780 bss_conf->p2p_noa_attr.index;
1781 bss_info_changed |= BSS_CHANGED_P2P_PS;
1787 /* just to be sure */
1788 ieee80211_stop_poll(sdata);
1790 ieee80211_led_assoc(local, 1);
1792 if (sdata->u.mgd.have_beacon) {
1794 * If the AP is buggy we may get here with no DTIM period
1795 * known, so assume it's 1 which is the only safe assumption
1796 * in that case, although if the TIM IE is broken powersave
1797 * probably just won't work at all.
1799 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1800 bss_conf->beacon_rate = bss->beacon_rate;
1801 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1803 bss_conf->beacon_rate = NULL;
1804 bss_conf->dtim_period = 0;
1807 bss_conf->assoc = 1;
1809 /* Tell the driver to monitor connection quality (if supported) */
1810 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1811 bss_conf->cqm_rssi_thold)
1812 bss_info_changed |= BSS_CHANGED_CQM;
1814 /* Enable ARP filtering */
1815 if (bss_conf->arp_addr_cnt)
1816 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1818 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1820 mutex_lock(&local->iflist_mtx);
1821 ieee80211_recalc_ps(local, -1);
1822 mutex_unlock(&local->iflist_mtx);
1824 ieee80211_recalc_smps(sdata);
1825 ieee80211_recalc_ps_vif(sdata);
1827 netif_carrier_on(sdata->dev);
1830 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1831 u16 stype, u16 reason, bool tx,
1834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1835 struct ieee80211_local *local = sdata->local;
1838 sdata_assert_lock(sdata);
1840 if (WARN_ON_ONCE(tx && !frame_buf))
1843 if (WARN_ON(!ifmgd->associated))
1846 ieee80211_stop_poll(sdata);
1848 ifmgd->associated = NULL;
1849 netif_carrier_off(sdata->dev);
1852 * if we want to get out of ps before disassoc (why?) we have
1853 * to do it before sending disassoc, as otherwise the null-packet
1856 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1857 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1858 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1860 local->ps_sdata = NULL;
1862 /* disable per-vif ps */
1863 ieee80211_recalc_ps_vif(sdata);
1865 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1867 ieee80211_flush_queues(local, sdata);
1869 /* deauthenticate/disassociate now */
1870 if (tx || frame_buf)
1871 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1872 reason, tx, frame_buf);
1874 /* flush out frame */
1876 ieee80211_flush_queues(local, sdata);
1878 /* clear bssid only after building the needed mgmt frames */
1879 memset(ifmgd->bssid, 0, ETH_ALEN);
1881 /* remove AP and TDLS peers */
1882 sta_info_flush_defer(sdata);
1884 /* finally reset all BSS / config parameters */
1885 changed |= ieee80211_reset_erp_info(sdata);
1887 ieee80211_led_assoc(local, 0);
1888 changed |= BSS_CHANGED_ASSOC;
1889 sdata->vif.bss_conf.assoc = false;
1891 ifmgd->p2p_noa_index = -1;
1892 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1893 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1895 /* on the next assoc, re-program HT/VHT parameters */
1896 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1897 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1898 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1899 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1901 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1903 del_timer_sync(&local->dynamic_ps_timer);
1904 cancel_work_sync(&local->dynamic_ps_enable_work);
1906 /* Disable ARP filtering */
1907 if (sdata->vif.bss_conf.arp_addr_cnt)
1908 changed |= BSS_CHANGED_ARP_FILTER;
1910 sdata->vif.bss_conf.qos = false;
1911 changed |= BSS_CHANGED_QOS;
1913 /* The BSSID (not really interesting) and HT changed */
1914 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1915 ieee80211_bss_info_change_notify(sdata, changed);
1917 /* disassociated - set to defaults now */
1918 ieee80211_set_wmm_default(sdata, false);
1920 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1921 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1922 del_timer_sync(&sdata->u.mgd.timer);
1923 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1925 sdata->vif.bss_conf.dtim_period = 0;
1926 sdata->vif.bss_conf.beacon_rate = NULL;
1928 ifmgd->have_beacon = false;
1931 ieee80211_vif_release_channel(sdata);
1934 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1935 struct ieee80211_hdr *hdr)
1938 * We can postpone the mgd.timer whenever receiving unicast frames
1939 * from AP because we know that the connection is working both ways
1940 * at that time. But multicast frames (and hence also beacons) must
1941 * be ignored here, because we need to trigger the timer during
1942 * data idle periods for sending the periodic probe request to the
1943 * AP we're connected to.
1945 if (is_multicast_ether_addr(hdr->addr1))
1948 ieee80211_sta_reset_conn_monitor(sdata);
1951 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1953 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1954 struct ieee80211_local *local = sdata->local;
1956 mutex_lock(&local->mtx);
1957 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1958 IEEE80211_STA_CONNECTION_POLL))) {
1959 mutex_unlock(&local->mtx);
1963 __ieee80211_stop_poll(sdata);
1965 mutex_lock(&local->iflist_mtx);
1966 ieee80211_recalc_ps(local, -1);
1967 mutex_unlock(&local->iflist_mtx);
1969 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1973 * We've received a probe response, but are not sure whether
1974 * we have or will be receiving any beacons or data, so let's
1975 * schedule the timers again, just in case.
1977 ieee80211_sta_reset_beacon_monitor(sdata);
1979 mod_timer(&ifmgd->conn_mon_timer,
1980 round_jiffies_up(jiffies +
1981 IEEE80211_CONNECTION_IDLE_TIME));
1983 mutex_unlock(&local->mtx);
1986 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1987 struct ieee80211_hdr *hdr, bool ack)
1989 if (!ieee80211_is_data(hdr->frame_control))
1992 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1993 sdata->u.mgd.probe_send_count > 0) {
1995 ieee80211_sta_reset_conn_monitor(sdata);
1997 sdata->u.mgd.nullfunc_failed = true;
1998 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2003 ieee80211_sta_reset_conn_monitor(sdata);
2006 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2010 u8 *dst = ifmgd->associated->bssid;
2011 u8 unicast_limit = max(1, max_probe_tries - 3);
2014 * Try sending broadcast probe requests for the last three
2015 * probe requests after the first ones failed since some
2016 * buggy APs only support broadcast probe requests.
2018 if (ifmgd->probe_send_count >= unicast_limit)
2022 * When the hardware reports an accurate Tx ACK status, it's
2023 * better to send a nullfunc frame instead of a probe request,
2024 * as it will kick us off the AP quickly if we aren't associated
2025 * anymore. The timeout will be reset if the frame is ACKed by
2028 ifmgd->probe_send_count++;
2030 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2031 ifmgd->nullfunc_failed = false;
2032 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2037 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2038 if (WARN_ON_ONCE(ssid == NULL))
2043 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2044 0, (u32) -1, true, 0,
2045 ifmgd->associated->channel, false);
2049 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2050 run_again(sdata, ifmgd->probe_timeout);
2051 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2052 ieee80211_flush_queues(sdata->local, sdata);
2055 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2059 bool already = false;
2061 if (!ieee80211_sdata_running(sdata))
2066 if (!ifmgd->associated)
2069 mutex_lock(&sdata->local->mtx);
2071 if (sdata->local->tmp_channel || sdata->local->scanning) {
2072 mutex_unlock(&sdata->local->mtx);
2077 mlme_dbg_ratelimited(sdata,
2078 "detected beacon loss from AP (missed %d beacons) - probing\n",
2081 ieee80211_cqm_rssi_notify(&sdata->vif,
2082 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2087 * The driver/our work has already reported this event or the
2088 * connection monitoring has kicked in and we have already sent
2089 * a probe request. Or maybe the AP died and the driver keeps
2090 * reporting until we disassociate...
2092 * In either case we have to ignore the current call to this
2093 * function (except for setting the correct probe reason bit)
2094 * because otherwise we would reset the timer every time and
2095 * never check whether we received a probe response!
2097 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2098 IEEE80211_STA_CONNECTION_POLL))
2102 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2104 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2106 mutex_unlock(&sdata->local->mtx);
2111 mutex_lock(&sdata->local->iflist_mtx);
2112 ieee80211_recalc_ps(sdata->local, -1);
2113 mutex_unlock(&sdata->local->iflist_mtx);
2115 ifmgd->probe_send_count = 0;
2116 ieee80211_mgd_probe_ap_send(sdata);
2118 sdata_unlock(sdata);
2121 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2122 struct ieee80211_vif *vif)
2124 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2126 struct cfg80211_bss *cbss;
2127 struct sk_buff *skb;
2131 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2134 sdata_assert_lock(sdata);
2136 if (ifmgd->associated)
2137 cbss = ifmgd->associated;
2138 else if (ifmgd->auth_data)
2139 cbss = ifmgd->auth_data->bss;
2140 else if (ifmgd->assoc_data)
2141 cbss = ifmgd->assoc_data->bss;
2146 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2147 if (WARN_ON_ONCE(ssid == NULL))
2152 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2153 (u32) -1, cbss->channel,
2160 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2162 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2164 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2165 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2168 if (!ifmgd->associated) {
2169 sdata_unlock(sdata);
2173 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2174 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2176 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2177 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2178 IEEE80211_MAX_QUEUE_MAP,
2179 IEEE80211_QUEUE_STOP_REASON_CSA);
2181 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2182 IEEE80211_DEAUTH_FRAME_LEN);
2183 sdata_unlock(sdata);
2186 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2188 struct ieee80211_sub_if_data *sdata =
2189 container_of(work, struct ieee80211_sub_if_data,
2190 u.mgd.beacon_connection_loss_work);
2191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2192 struct sta_info *sta;
2194 if (ifmgd->associated) {
2196 sta = sta_info_get(sdata, ifmgd->bssid);
2198 sta->beacon_loss_count++;
2202 if (ifmgd->connection_loss) {
2203 sdata_info(sdata, "Connection to AP %pM lost\n",
2205 __ieee80211_disconnect(sdata);
2207 ieee80211_mgd_probe_ap(sdata, true);
2211 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2213 struct ieee80211_sub_if_data *sdata =
2214 container_of(work, struct ieee80211_sub_if_data,
2215 u.mgd.csa_connection_drop_work);
2217 __ieee80211_disconnect(sdata);
2220 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2222 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2223 struct ieee80211_hw *hw = &sdata->local->hw;
2225 trace_api_beacon_loss(sdata);
2227 sdata->u.mgd.connection_loss = false;
2228 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2230 EXPORT_SYMBOL(ieee80211_beacon_loss);
2232 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2234 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2235 struct ieee80211_hw *hw = &sdata->local->hw;
2237 trace_api_connection_loss(sdata);
2239 sdata->u.mgd.connection_loss = true;
2240 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2242 EXPORT_SYMBOL(ieee80211_connection_loss);
2245 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2248 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2250 sdata_assert_lock(sdata);
2253 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2255 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2256 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2257 sdata->u.mgd.flags = 0;
2258 ieee80211_vif_release_channel(sdata);
2261 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2263 sdata->u.mgd.auth_data = NULL;
2266 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2267 struct ieee80211_mgmt *mgmt, size_t len)
2269 struct ieee80211_local *local = sdata->local;
2270 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2272 struct ieee802_11_elems elems;
2275 pos = mgmt->u.auth.variable;
2276 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2277 if (!elems.challenge)
2279 auth_data->expected_transaction = 4;
2280 drv_mgd_prepare_tx(sdata->local, sdata);
2281 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2282 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2283 IEEE80211_TX_INTFL_MLME_CONN_TX;
2284 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2285 elems.challenge - 2, elems.challenge_len + 2,
2286 auth_data->bss->bssid, auth_data->bss->bssid,
2287 auth_data->key, auth_data->key_len,
2288 auth_data->key_idx, tx_flags);
2291 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2292 struct ieee80211_mgmt *mgmt, size_t len)
2294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2296 u16 auth_alg, auth_transaction, status_code;
2297 struct sta_info *sta;
2299 sdata_assert_lock(sdata);
2304 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2307 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2309 if (!ether_addr_equal(bssid, mgmt->bssid))
2312 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2313 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2314 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2316 if (auth_alg != ifmgd->auth_data->algorithm ||
2317 auth_transaction != ifmgd->auth_data->expected_transaction) {
2318 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2319 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2321 ifmgd->auth_data->expected_transaction);
2325 if (status_code != WLAN_STATUS_SUCCESS) {
2326 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2327 mgmt->sa, status_code);
2328 ieee80211_destroy_auth_data(sdata, false);
2329 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2333 switch (ifmgd->auth_data->algorithm) {
2334 case WLAN_AUTH_OPEN:
2335 case WLAN_AUTH_LEAP:
2339 case WLAN_AUTH_SHARED_KEY:
2340 if (ifmgd->auth_data->expected_transaction != 4) {
2341 ieee80211_auth_challenge(sdata, mgmt, len);
2342 /* need another frame */
2347 WARN_ONCE(1, "invalid auth alg %d",
2348 ifmgd->auth_data->algorithm);
2352 sdata_info(sdata, "authenticated\n");
2353 ifmgd->auth_data->done = true;
2354 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2355 ifmgd->auth_data->timeout_started = true;
2356 run_again(sdata, ifmgd->auth_data->timeout);
2358 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2359 ifmgd->auth_data->expected_transaction != 2) {
2361 * Report auth frame to user space for processing since another
2362 * round of Authentication frames is still needed.
2364 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2368 /* move station state to auth */
2369 mutex_lock(&sdata->local->sta_mtx);
2370 sta = sta_info_get(sdata, bssid);
2372 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2375 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2376 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2379 mutex_unlock(&sdata->local->sta_mtx);
2381 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2384 mutex_unlock(&sdata->local->sta_mtx);
2385 /* ignore frame -- wait for timeout */
2389 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2390 struct ieee80211_mgmt *mgmt, size_t len)
2392 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2393 const u8 *bssid = NULL;
2396 sdata_assert_lock(sdata);
2401 if (!ifmgd->associated ||
2402 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2405 bssid = ifmgd->associated->bssid;
2407 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2409 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2410 bssid, reason_code);
2412 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2414 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2418 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2419 struct ieee80211_mgmt *mgmt, size_t len)
2421 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2424 sdata_assert_lock(sdata);
2429 if (!ifmgd->associated ||
2430 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2433 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2435 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2436 mgmt->sa, reason_code);
2438 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2440 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2443 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2444 u8 *supp_rates, unsigned int supp_rates_len,
2445 u32 *rates, u32 *basic_rates,
2446 bool *have_higher_than_11mbit,
2447 int *min_rate, int *min_rate_index,
2448 int shift, u32 rate_flags)
2452 for (i = 0; i < supp_rates_len; i++) {
2453 int rate = supp_rates[i] & 0x7f;
2454 bool is_basic = !!(supp_rates[i] & 0x80);
2456 if ((rate * 5 * (1 << shift)) > 110)
2457 *have_higher_than_11mbit = true;
2460 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2461 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2463 * Note: Even through the membership selector and the basic
2464 * rate flag share the same bit, they are not exactly
2467 if (!!(supp_rates[i] & 0x80) &&
2468 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2471 for (j = 0; j < sband->n_bitrates; j++) {
2472 struct ieee80211_rate *br;
2475 br = &sband->bitrates[j];
2476 if ((rate_flags & br->flags) != rate_flags)
2479 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2480 if (brate == rate) {
2483 *basic_rates |= BIT(j);
2484 if ((rate * 5) < *min_rate) {
2485 *min_rate = rate * 5;
2486 *min_rate_index = j;
2494 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2497 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2499 sdata_assert_lock(sdata);
2502 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2504 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2505 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2506 sdata->u.mgd.flags = 0;
2507 ieee80211_vif_release_channel(sdata);
2511 sdata->u.mgd.assoc_data = NULL;
2514 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2515 struct cfg80211_bss *cbss,
2516 struct ieee80211_mgmt *mgmt, size_t len)
2518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2519 struct ieee80211_local *local = sdata->local;
2520 struct ieee80211_supported_band *sband;
2521 struct sta_info *sta;
2523 u16 capab_info, aid;
2524 struct ieee802_11_elems elems;
2525 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2526 const struct cfg80211_bss_ies *bss_ies = NULL;
2527 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2532 /* AssocResp and ReassocResp have identical structure */
2534 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2535 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2537 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2538 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2540 aid &= ~(BIT(15) | BIT(14));
2542 ifmgd->broken_ap = false;
2544 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2545 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2548 ifmgd->broken_ap = true;
2551 pos = mgmt->u.assoc_resp.variable;
2552 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2554 if (!elems.supp_rates) {
2555 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2562 * Some APs are erroneously not including some information in their
2563 * (re)association response frames. Try to recover by using the data
2564 * from the beacon or probe response. This seems to afflict mobile
2565 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2566 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2568 if ((assoc_data->wmm && !elems.wmm_param) ||
2569 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2570 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2571 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2572 (!elems.vht_cap_elem || !elems.vht_operation))) {
2573 const struct cfg80211_bss_ies *ies;
2574 struct ieee802_11_elems bss_elems;
2577 ies = rcu_dereference(cbss->ies);
2579 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2585 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2587 if (assoc_data->wmm &&
2588 !elems.wmm_param && bss_elems.wmm_param) {
2589 elems.wmm_param = bss_elems.wmm_param;
2591 "AP bug: WMM param missing from AssocResp\n");
2595 * Also check if we requested HT/VHT, otherwise the AP doesn't
2596 * have to include the IEs in the (re)association response.
2598 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2599 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2600 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2602 "AP bug: HT capability missing from AssocResp\n");
2604 if (!elems.ht_operation && bss_elems.ht_operation &&
2605 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2606 elems.ht_operation = bss_elems.ht_operation;
2608 "AP bug: HT operation missing from AssocResp\n");
2610 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2611 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2612 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2614 "AP bug: VHT capa missing from AssocResp\n");
2616 if (!elems.vht_operation && bss_elems.vht_operation &&
2617 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2618 elems.vht_operation = bss_elems.vht_operation;
2620 "AP bug: VHT operation missing from AssocResp\n");
2625 * We previously checked these in the beacon/probe response, so
2626 * they should be present here. This is just a safety net.
2628 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2629 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2631 "HT AP is missing WMM params or HT capability/operation\n");
2636 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2637 (!elems.vht_cap_elem || !elems.vht_operation)) {
2639 "VHT AP is missing VHT capability/operation\n");
2644 mutex_lock(&sdata->local->sta_mtx);
2646 * station info was already allocated and inserted before
2647 * the association and should be available to us
2649 sta = sta_info_get(sdata, cbss->bssid);
2650 if (WARN_ON(!sta)) {
2651 mutex_unlock(&sdata->local->sta_mtx);
2656 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2658 /* Set up internal HT/VHT capabilities */
2659 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2660 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2661 elems.ht_cap_elem, sta);
2663 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2664 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2665 elems.vht_cap_elem, sta);
2668 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2669 * in their association response, so ignore that data for our own
2670 * configuration. If it changed since the last beacon, we'll get the
2671 * next beacon and update then.
2675 * If an operating mode notification IE is present, override the
2676 * NSS calculation (that would be done in rate_control_rate_init())
2677 * and use the # of streams from that element.
2679 if (elems.opmode_notif &&
2680 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2683 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2684 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2686 sta->sta.rx_nss = nss;
2689 rate_control_rate_init(sta);
2691 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2692 set_sta_flag(sta, WLAN_STA_MFP);
2694 if (elems.wmm_param)
2695 set_sta_flag(sta, WLAN_STA_WME);
2697 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2698 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2699 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2702 "failed to move station %pM to desired state\n",
2704 WARN_ON(__sta_info_destroy(sta));
2705 mutex_unlock(&sdata->local->sta_mtx);
2710 mutex_unlock(&sdata->local->sta_mtx);
2713 * Always handle WMM once after association regardless
2714 * of the first value the AP uses. Setting -1 here has
2715 * that effect because the AP values is an unsigned
2718 ifmgd->wmm_last_param_set = -1;
2720 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2721 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2722 elems.wmm_param_len);
2724 ieee80211_set_wmm_default(sdata, false);
2725 changed |= BSS_CHANGED_QOS;
2727 /* set AID and assoc capability,
2728 * ieee80211_set_associated() will tell the driver */
2729 bss_conf->aid = aid;
2730 bss_conf->assoc_capability = capab_info;
2731 ieee80211_set_associated(sdata, cbss, changed);
2734 * If we're using 4-addr mode, let the AP know that we're
2735 * doing so, so that it can create the STA VLAN on its side
2737 if (ifmgd->use_4addr)
2738 ieee80211_send_4addr_nullfunc(local, sdata);
2741 * Start timer to probe the connection to the AP now.
2742 * Also start the timer that will detect beacon loss.
2744 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2745 ieee80211_sta_reset_beacon_monitor(sdata);
2753 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2754 struct ieee80211_mgmt *mgmt,
2757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2758 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2759 u16 capab_info, status_code, aid;
2760 struct ieee802_11_elems elems;
2763 struct cfg80211_bss *bss;
2765 sdata_assert_lock(sdata);
2769 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2773 * AssocResp and ReassocResp have identical structure, so process both
2774 * of them in this function.
2780 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2781 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2782 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2783 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2786 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2787 reassoc ? "Rea" : "A", mgmt->sa,
2788 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2790 pos = mgmt->u.assoc_resp.variable;
2791 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2793 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2794 elems.timeout_int &&
2795 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2797 tu = le32_to_cpu(elems.timeout_int->value);
2798 ms = tu * 1024 / 1000;
2800 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2802 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2803 assoc_data->timeout_started = true;
2804 if (ms > IEEE80211_ASSOC_TIMEOUT)
2805 run_again(sdata, assoc_data->timeout);
2809 bss = assoc_data->bss;
2811 if (status_code != WLAN_STATUS_SUCCESS) {
2812 sdata_info(sdata, "%pM denied association (code=%d)\n",
2813 mgmt->sa, status_code);
2814 ieee80211_destroy_assoc_data(sdata, false);
2816 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2817 /* oops -- internal error -- send timeout for now */
2818 ieee80211_destroy_assoc_data(sdata, false);
2819 cfg80211_assoc_timeout(sdata->dev, bss);
2822 sdata_info(sdata, "associated\n");
2825 * destroy assoc_data afterwards, as otherwise an idle
2826 * recalc after assoc_data is NULL but before associated
2827 * is set can cause the interface to go idle
2829 ieee80211_destroy_assoc_data(sdata, true);
2832 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2835 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2836 struct ieee80211_mgmt *mgmt, size_t len,
2837 struct ieee80211_rx_status *rx_status,
2838 struct ieee802_11_elems *elems)
2840 struct ieee80211_local *local = sdata->local;
2842 struct ieee80211_bss *bss;
2843 struct ieee80211_channel *channel;
2845 sdata_assert_lock(sdata);
2847 if (elems->ds_params)
2848 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2851 freq = rx_status->freq;
2853 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2855 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2858 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2861 ieee80211_rx_bss_put(local, bss);
2862 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2867 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2868 struct sk_buff *skb)
2870 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2871 struct ieee80211_if_managed *ifmgd;
2872 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2873 size_t baselen, len = skb->len;
2874 struct ieee802_11_elems elems;
2876 ifmgd = &sdata->u.mgd;
2878 sdata_assert_lock(sdata);
2880 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2881 return; /* ignore ProbeResp to foreign address */
2883 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2887 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2890 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2892 if (ifmgd->associated &&
2893 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2894 ieee80211_reset_ap_probe(sdata);
2896 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2897 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2898 /* got probe response, continue with auth */
2899 sdata_info(sdata, "direct probe responded\n");
2900 ifmgd->auth_data->tries = 0;
2901 ifmgd->auth_data->timeout = jiffies;
2902 ifmgd->auth_data->timeout_started = true;
2903 run_again(sdata, ifmgd->auth_data->timeout);
2908 * This is the canonical list of information elements we care about,
2909 * the filter code also gives us all changes to the Microsoft OUI
2910 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2912 * We implement beacon filtering in software since that means we can
2913 * avoid processing the frame here and in cfg80211, and userspace
2914 * will not be able to tell whether the hardware supports it or not.
2916 * XXX: This list needs to be dynamic -- userspace needs to be able to
2917 * add items it requires. It also needs to be able to tell us to
2918 * look out for other vendor IEs.
2920 static const u64 care_about_ies =
2921 (1ULL << WLAN_EID_COUNTRY) |
2922 (1ULL << WLAN_EID_ERP_INFO) |
2923 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2924 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2925 (1ULL << WLAN_EID_HT_CAPABILITY) |
2926 (1ULL << WLAN_EID_HT_OPERATION);
2928 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2929 struct ieee80211_mgmt *mgmt, size_t len,
2930 struct ieee80211_rx_status *rx_status)
2932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2933 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2935 struct ieee802_11_elems elems;
2936 struct ieee80211_local *local = sdata->local;
2937 struct ieee80211_chanctx_conf *chanctx_conf;
2938 struct ieee80211_channel *chan;
2939 struct sta_info *sta;
2945 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2947 sdata_assert_lock(sdata);
2949 /* Process beacon from the current BSS */
2950 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2955 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2956 if (!chanctx_conf) {
2961 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2965 chan = chanctx_conf->def.chan;
2968 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2969 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2970 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2971 len - baselen, false, &elems);
2973 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2974 if (elems.tim && !elems.parse_error) {
2975 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2976 ifmgd->dtim_period = tim_ie->dtim_period;
2978 ifmgd->have_beacon = true;
2979 ifmgd->assoc_data->need_beacon = false;
2980 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2981 sdata->vif.bss_conf.sync_tsf =
2982 le64_to_cpu(mgmt->u.beacon.timestamp);
2983 sdata->vif.bss_conf.sync_device_ts =
2984 rx_status->device_timestamp;
2986 sdata->vif.bss_conf.sync_dtim_count =
2987 elems.tim->dtim_count;
2989 sdata->vif.bss_conf.sync_dtim_count = 0;
2991 /* continue assoc process */
2992 ifmgd->assoc_data->timeout = jiffies;
2993 ifmgd->assoc_data->timeout_started = true;
2994 run_again(sdata, ifmgd->assoc_data->timeout);
2998 if (!ifmgd->associated ||
2999 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3001 bssid = ifmgd->associated->bssid;
3003 /* Track average RSSI from the Beacon frames of the current AP */
3004 ifmgd->last_beacon_signal = rx_status->signal;
3005 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3006 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3007 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3008 ifmgd->last_cqm_event_signal = 0;
3009 ifmgd->count_beacon_signal = 1;
3010 ifmgd->last_ave_beacon_signal = 0;
3012 ifmgd->ave_beacon_signal =
3013 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3014 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3015 ifmgd->ave_beacon_signal) / 16;
3016 ifmgd->count_beacon_signal++;
3019 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3020 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3021 int sig = ifmgd->ave_beacon_signal;
3022 int last_sig = ifmgd->last_ave_beacon_signal;
3025 * if signal crosses either of the boundaries, invoke callback
3026 * with appropriate parameters
3028 if (sig > ifmgd->rssi_max_thold &&
3029 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3030 ifmgd->last_ave_beacon_signal = sig;
3031 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3032 } else if (sig < ifmgd->rssi_min_thold &&
3033 (last_sig >= ifmgd->rssi_max_thold ||
3035 ifmgd->last_ave_beacon_signal = sig;
3036 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3040 if (bss_conf->cqm_rssi_thold &&
3041 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3042 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3043 int sig = ifmgd->ave_beacon_signal / 16;
3044 int last_event = ifmgd->last_cqm_event_signal;
3045 int thold = bss_conf->cqm_rssi_thold;
3046 int hyst = bss_conf->cqm_rssi_hyst;
3048 (last_event == 0 || sig < last_event - hyst)) {
3049 ifmgd->last_cqm_event_signal = sig;
3050 ieee80211_cqm_rssi_notify(
3052 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3054 } else if (sig > thold &&
3055 (last_event == 0 || sig > last_event + hyst)) {
3056 ifmgd->last_cqm_event_signal = sig;
3057 ieee80211_cqm_rssi_notify(
3059 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3064 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
3065 mlme_dbg_ratelimited(sdata,
3066 "cancelling AP probe due to a received beacon\n");
3067 mutex_lock(&local->mtx);
3068 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3069 ieee80211_run_deferred_scan(local);
3070 mutex_unlock(&local->mtx);
3072 mutex_lock(&local->iflist_mtx);
3073 ieee80211_recalc_ps(local, -1);
3074 mutex_unlock(&local->iflist_mtx);
3078 * Push the beacon loss detection into the future since
3079 * we are processing a beacon from the AP just now.
3081 ieee80211_sta_reset_beacon_monitor(sdata);
3083 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3084 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3085 len - baselen, false, &elems,
3086 care_about_ies, ncrc);
3088 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3089 bool directed_tim = ieee80211_check_tim(elems.tim,
3093 if (local->hw.conf.dynamic_ps_timeout > 0) {
3094 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3095 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3096 ieee80211_hw_config(local,
3097 IEEE80211_CONF_CHANGE_PS);
3099 ieee80211_send_nullfunc(local, sdata, 0);
3100 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3101 local->pspolling = true;
3104 * Here is assumed that the driver will be
3105 * able to send ps-poll frame and receive a
3106 * response even though power save mode is
3107 * enabled, but some drivers might require
3108 * to disable power save here. This needs
3109 * to be investigated.
3111 ieee80211_send_pspoll(local, sdata);
3116 if (sdata->vif.p2p) {
3117 struct ieee80211_p2p_noa_attr noa = {};
3120 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3122 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3123 (u8 *) &noa, sizeof(noa));
3125 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3126 /* valid noa_attr and index changed */
3127 sdata->u.mgd.p2p_noa_index = noa.index;
3128 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3129 changed |= BSS_CHANGED_P2P_PS;
3131 * make sure we update all information, the CRC
3132 * mechanism doesn't look at P2P attributes.
3134 ifmgd->beacon_crc_valid = false;
3136 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3137 /* noa_attr not found and we had valid noa_attr before */
3138 sdata->u.mgd.p2p_noa_index = -1;
3139 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3140 changed |= BSS_CHANGED_P2P_PS;
3141 ifmgd->beacon_crc_valid = false;
3145 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3147 ifmgd->beacon_crc = ncrc;
3148 ifmgd->beacon_crc_valid = true;
3150 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3152 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3155 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3156 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3157 elems.wmm_param_len))
3158 changed |= BSS_CHANGED_QOS;
3161 * If we haven't had a beacon before, tell the driver about the
3162 * DTIM period (and beacon timing if desired) now.
3164 if (!ifmgd->have_beacon) {
3165 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3167 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3169 bss_conf->dtim_period = 1;
3171 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3172 sdata->vif.bss_conf.sync_tsf =
3173 le64_to_cpu(mgmt->u.beacon.timestamp);
3174 sdata->vif.bss_conf.sync_device_ts =
3175 rx_status->device_timestamp;
3177 sdata->vif.bss_conf.sync_dtim_count =
3178 elems.tim->dtim_count;
3180 sdata->vif.bss_conf.sync_dtim_count = 0;
3183 changed |= BSS_CHANGED_BEACON_INFO;
3184 ifmgd->have_beacon = true;
3186 mutex_lock(&local->iflist_mtx);
3187 ieee80211_recalc_ps(local, -1);
3188 mutex_unlock(&local->iflist_mtx);
3190 ieee80211_recalc_ps_vif(sdata);
3193 if (elems.erp_info) {
3195 erp_value = elems.erp_info[0];
3199 changed |= ieee80211_handle_bss_capability(sdata,
3200 le16_to_cpu(mgmt->u.beacon.capab_info),
3201 erp_valid, erp_value);
3203 mutex_lock(&local->sta_mtx);
3204 sta = sta_info_get(sdata, bssid);
3206 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3207 elems.vht_operation, bssid, &changed)) {
3208 mutex_unlock(&local->sta_mtx);
3209 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3210 WLAN_REASON_DEAUTH_LEAVING,
3212 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3213 sizeof(deauth_buf));
3217 if (sta && elems.opmode_notif)
3218 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3219 rx_status->band, true);
3220 mutex_unlock(&local->sta_mtx);
3222 if (elems.country_elem && elems.pwr_constr_elem &&
3223 mgmt->u.probe_resp.capab_info &
3224 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3225 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3227 elems.country_elem_len,
3228 elems.pwr_constr_elem);
3230 ieee80211_bss_info_change_notify(sdata, changed);
3233 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3234 struct sk_buff *skb)
3236 struct ieee80211_rx_status *rx_status;
3237 struct ieee80211_mgmt *mgmt;
3239 struct ieee802_11_elems elems;
3242 rx_status = (struct ieee80211_rx_status *) skb->cb;
3243 mgmt = (struct ieee80211_mgmt *) skb->data;
3244 fc = le16_to_cpu(mgmt->frame_control);
3248 switch (fc & IEEE80211_FCTL_STYPE) {
3249 case IEEE80211_STYPE_BEACON:
3250 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3252 case IEEE80211_STYPE_PROBE_RESP:
3253 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3255 case IEEE80211_STYPE_AUTH:
3256 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3258 case IEEE80211_STYPE_DEAUTH:
3259 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3261 case IEEE80211_STYPE_DISASSOC:
3262 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3264 case IEEE80211_STYPE_ASSOC_RESP:
3265 case IEEE80211_STYPE_REASSOC_RESP:
3266 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3268 case IEEE80211_STYPE_ACTION:
3269 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3270 ies_len = skb->len -
3271 offsetof(struct ieee80211_mgmt,
3272 u.action.u.chan_switch.variable);
3277 ieee802_11_parse_elems(
3278 mgmt->u.action.u.chan_switch.variable,
3279 ies_len, true, &elems);
3281 if (elems.parse_error)
3284 ieee80211_sta_process_chanswitch(sdata,
3287 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3288 ies_len = skb->len -
3289 offsetof(struct ieee80211_mgmt,
3290 u.action.u.ext_chan_switch.variable);
3295 ieee802_11_parse_elems(
3296 mgmt->u.action.u.ext_chan_switch.variable,
3297 ies_len, true, &elems);
3299 if (elems.parse_error)
3302 /* for the handling code pretend this was also an IE */
3303 elems.ext_chansw_ie =
3304 &mgmt->u.action.u.ext_chan_switch.data;
3306 ieee80211_sta_process_chanswitch(sdata,
3312 sdata_unlock(sdata);
3315 static void ieee80211_sta_timer(unsigned long data)
3317 struct ieee80211_sub_if_data *sdata =
3318 (struct ieee80211_sub_if_data *) data;
3320 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3323 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3324 u8 *bssid, u8 reason, bool tx)
3326 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3328 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3331 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3332 IEEE80211_DEAUTH_FRAME_LEN);
3335 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3337 struct ieee80211_local *local = sdata->local;
3338 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3339 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3342 sdata_assert_lock(sdata);
3344 if (WARN_ON_ONCE(!auth_data))
3349 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3350 sdata_info(sdata, "authentication with %pM timed out\n",
3351 auth_data->bss->bssid);
3354 * Most likely AP is not in the range so remove the
3355 * bss struct for that AP.
3357 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3362 drv_mgd_prepare_tx(local, sdata);
3364 if (auth_data->bss->proberesp_ies) {
3368 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3369 auth_data->bss->bssid, auth_data->tries,
3370 IEEE80211_AUTH_MAX_TRIES);
3372 auth_data->expected_transaction = 2;
3374 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3375 trans = auth_data->sae_trans;
3376 status = auth_data->sae_status;
3377 auth_data->expected_transaction = trans;
3380 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3381 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3382 IEEE80211_TX_INTFL_MLME_CONN_TX;
3384 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3385 auth_data->data, auth_data->data_len,
3386 auth_data->bss->bssid,
3387 auth_data->bss->bssid, NULL, 0, 0,
3392 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3393 auth_data->bss->bssid, auth_data->tries,
3394 IEEE80211_AUTH_MAX_TRIES);
3397 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3403 * Direct probe is sent to broadcast address as some APs
3404 * will not answer to direct packet in unassociated state.
3406 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3407 NULL, 0, (u32) -1, true, 0,
3408 auth_data->bss->channel, false);
3412 if (tx_flags == 0) {
3413 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3414 auth_data->timeout_started = true;
3415 run_again(sdata, auth_data->timeout);
3417 auth_data->timeout =
3418 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3419 auth_data->timeout_started = true;
3420 run_again(sdata, auth_data->timeout);
3426 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3428 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3429 struct ieee80211_local *local = sdata->local;
3431 sdata_assert_lock(sdata);
3433 assoc_data->tries++;
3434 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3435 sdata_info(sdata, "association with %pM timed out\n",
3436 assoc_data->bss->bssid);
3439 * Most likely AP is not in the range so remove the
3440 * bss struct for that AP.
3442 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3447 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3448 assoc_data->bss->bssid, assoc_data->tries,
3449 IEEE80211_ASSOC_MAX_TRIES);
3450 ieee80211_send_assoc(sdata);
3452 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3453 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3454 assoc_data->timeout_started = true;
3455 run_again(sdata, assoc_data->timeout);
3457 assoc_data->timeout =
3458 round_jiffies_up(jiffies +
3459 IEEE80211_ASSOC_TIMEOUT_LONG);
3460 assoc_data->timeout_started = true;
3461 run_again(sdata, assoc_data->timeout);
3467 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3468 __le16 fc, bool acked)
3470 struct ieee80211_local *local = sdata->local;
3472 sdata->u.mgd.status_fc = fc;
3473 sdata->u.mgd.status_acked = acked;
3474 sdata->u.mgd.status_received = true;
3476 ieee80211_queue_work(&local->hw, &sdata->work);
3479 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3481 struct ieee80211_local *local = sdata->local;
3482 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3486 if (ifmgd->status_received) {
3487 __le16 fc = ifmgd->status_fc;
3488 bool status_acked = ifmgd->status_acked;
3490 ifmgd->status_received = false;
3491 if (ifmgd->auth_data &&
3492 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3494 ifmgd->auth_data->timeout =
3495 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3496 run_again(sdata, ifmgd->auth_data->timeout);
3498 ifmgd->auth_data->timeout = jiffies - 1;
3500 ifmgd->auth_data->timeout_started = true;
3501 } else if (ifmgd->assoc_data &&
3502 (ieee80211_is_assoc_req(fc) ||
3503 ieee80211_is_reassoc_req(fc))) {
3505 ifmgd->assoc_data->timeout =
3506 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3507 run_again(sdata, ifmgd->assoc_data->timeout);
3509 ifmgd->assoc_data->timeout = jiffies - 1;
3511 ifmgd->assoc_data->timeout_started = true;
3515 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3516 time_after(jiffies, ifmgd->auth_data->timeout)) {
3517 if (ifmgd->auth_data->done) {
3519 * ok ... we waited for assoc but userspace didn't,
3520 * so let's just kill the auth data
3522 ieee80211_destroy_auth_data(sdata, false);
3523 } else if (ieee80211_probe_auth(sdata)) {
3526 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3528 ieee80211_destroy_auth_data(sdata, false);
3530 cfg80211_auth_timeout(sdata->dev, bssid);
3532 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3533 run_again(sdata, ifmgd->auth_data->timeout);
3535 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3536 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3537 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3538 ieee80211_do_assoc(sdata)) {
3539 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3541 ieee80211_destroy_assoc_data(sdata, false);
3542 cfg80211_assoc_timeout(sdata->dev, bss);
3544 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3545 run_again(sdata, ifmgd->assoc_data->timeout);
3547 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3548 IEEE80211_STA_CONNECTION_POLL) &&
3549 ifmgd->associated) {
3553 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3555 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3556 max_tries = max_nullfunc_tries;
3558 max_tries = max_probe_tries;
3560 /* ACK received for nullfunc probing frame */
3561 if (!ifmgd->probe_send_count)
3562 ieee80211_reset_ap_probe(sdata);
3563 else if (ifmgd->nullfunc_failed) {
3564 if (ifmgd->probe_send_count < max_tries) {
3566 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3567 bssid, ifmgd->probe_send_count,
3569 ieee80211_mgd_probe_ap_send(sdata);
3572 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3574 ieee80211_sta_connection_lost(sdata, bssid,
3575 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3578 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3579 run_again(sdata, ifmgd->probe_timeout);
3580 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3582 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3583 bssid, probe_wait_ms);
3584 ieee80211_sta_connection_lost(sdata, bssid,
3585 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3586 } else if (ifmgd->probe_send_count < max_tries) {
3588 "No probe response from AP %pM after %dms, try %d/%i\n",
3589 bssid, probe_wait_ms,
3590 ifmgd->probe_send_count, max_tries);
3591 ieee80211_mgd_probe_ap_send(sdata);
3594 * We actually lost the connection ... or did we?
3597 wiphy_debug(local->hw.wiphy,
3598 "%s: No probe response from AP %pM"
3599 " after %dms, disconnecting.\n",
3601 bssid, probe_wait_ms);
3603 ieee80211_sta_connection_lost(sdata, bssid,
3604 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3608 sdata_unlock(sdata);
3611 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3613 struct ieee80211_sub_if_data *sdata =
3614 (struct ieee80211_sub_if_data *) data;
3615 struct ieee80211_local *local = sdata->local;
3617 if (local->quiescing)
3620 sdata->u.mgd.connection_loss = false;
3621 ieee80211_queue_work(&sdata->local->hw,
3622 &sdata->u.mgd.beacon_connection_loss_work);
3625 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3627 struct ieee80211_sub_if_data *sdata =
3628 (struct ieee80211_sub_if_data *) data;
3629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3630 struct ieee80211_local *local = sdata->local;
3632 if (local->quiescing)
3635 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3638 static void ieee80211_sta_monitor_work(struct work_struct *work)
3640 struct ieee80211_sub_if_data *sdata =
3641 container_of(work, struct ieee80211_sub_if_data,
3642 u.mgd.monitor_work);
3644 ieee80211_mgd_probe_ap(sdata, false);
3647 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3651 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3652 __ieee80211_stop_poll(sdata);
3654 /* let's probe the connection once */
3655 flags = sdata->local->hw.flags;
3656 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3657 ieee80211_queue_work(&sdata->local->hw,
3658 &sdata->u.mgd.monitor_work);
3659 /* and do all the other regular work too */
3660 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3665 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3667 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3670 if (!ifmgd->associated) {
3671 sdata_unlock(sdata);
3675 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3676 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3677 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3678 ieee80211_sta_connection_lost(sdata,
3679 ifmgd->associated->bssid,
3680 WLAN_REASON_UNSPECIFIED,
3682 sdata_unlock(sdata);
3685 sdata_unlock(sdata);
3689 /* interface setup */
3690 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3692 struct ieee80211_if_managed *ifmgd;
3694 ifmgd = &sdata->u.mgd;
3695 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3696 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3697 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3698 ieee80211_beacon_connection_loss_work);
3699 INIT_WORK(&ifmgd->csa_connection_drop_work,
3700 ieee80211_csa_connection_drop_work);
3701 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3702 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3703 (unsigned long) sdata);
3704 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3705 (unsigned long) sdata);
3706 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3707 (unsigned long) sdata);
3708 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3709 (unsigned long) sdata);
3712 ifmgd->powersave = sdata->wdev.ps;
3713 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3714 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3715 ifmgd->p2p_noa_index = -1;
3717 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3718 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3720 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3723 /* scan finished notification */
3724 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3726 struct ieee80211_sub_if_data *sdata;
3728 /* Restart STA timers */
3730 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3731 if (ieee80211_sdata_running(sdata))
3732 ieee80211_restart_sta_timer(sdata);
3737 int ieee80211_max_network_latency(struct notifier_block *nb,
3738 unsigned long data, void *dummy)
3740 s32 latency_usec = (s32) data;
3741 struct ieee80211_local *local =
3742 container_of(nb, struct ieee80211_local,
3743 network_latency_notifier);
3745 mutex_lock(&local->iflist_mtx);
3746 ieee80211_recalc_ps(local, latency_usec);
3747 mutex_unlock(&local->iflist_mtx);
3752 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3753 struct cfg80211_bss *cbss)
3755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3756 const u8 *ht_cap_ie, *vht_cap_ie;
3757 const struct ieee80211_ht_cap *ht_cap;
3758 const struct ieee80211_vht_cap *vht_cap;
3761 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3764 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3765 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3766 ht_cap = (void *)(ht_cap_ie + 2);
3767 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3769 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3770 * "Tx Unequal Modulation Supported" fields.
3774 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3777 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3778 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3782 vht_cap = (void *)(vht_cap_ie + 2);
3783 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3784 for (nss = 8; nss > 0; nss--) {
3785 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3786 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3789 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3790 chains = max(chains, nss);
3796 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3797 struct cfg80211_bss *cbss)
3799 struct ieee80211_local *local = sdata->local;
3800 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3801 const struct ieee80211_ht_operation *ht_oper = NULL;
3802 const struct ieee80211_vht_operation *vht_oper = NULL;
3803 struct ieee80211_supported_band *sband;
3804 struct cfg80211_chan_def chandef;
3807 sband = local->hw.wiphy->bands[cbss->channel->band];
3809 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3810 IEEE80211_STA_DISABLE_80P80MHZ |
3811 IEEE80211_STA_DISABLE_160MHZ);
3815 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3816 sband->ht_cap.ht_supported) {
3817 const u8 *ht_oper_ie, *ht_cap;
3819 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3820 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3821 ht_oper = (void *)(ht_oper_ie + 2);
3823 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3824 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3825 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3830 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3831 sband->vht_cap.vht_supported) {
3832 const u8 *vht_oper_ie, *vht_cap;
3834 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3835 WLAN_EID_VHT_OPERATION);
3836 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3837 vht_oper = (void *)(vht_oper_ie + 2);
3838 if (vht_oper && !ht_oper) {
3841 "AP advertised VHT without HT, disabling both\n");
3842 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3843 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3846 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3847 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3848 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3853 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3858 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3863 /* will change later if needed */
3864 sdata->smps_mode = IEEE80211_SMPS_OFF;
3867 * If this fails (possibly due to channel context sharing
3868 * on incompatible channels, e.g. 80+80 and 160 sharing the
3869 * same control channel) try to use a smaller bandwidth.
3871 ret = ieee80211_vif_use_channel(sdata, &chandef,
3872 IEEE80211_CHANCTX_SHARED);
3874 /* don't downgrade for 5 and 10 MHz channels, though. */
3875 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3876 chandef.width == NL80211_CHAN_WIDTH_10)
3879 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3880 ifmgd->flags |= chandef_downgrade(&chandef);
3881 ret = ieee80211_vif_use_channel(sdata, &chandef,
3882 IEEE80211_CHANCTX_SHARED);
3887 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3888 struct cfg80211_bss *cbss, bool assoc)
3890 struct ieee80211_local *local = sdata->local;
3891 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3892 struct ieee80211_bss *bss = (void *)cbss->priv;
3893 struct sta_info *new_sta = NULL;
3894 bool have_sta = false;
3897 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3902 have_sta = sta_info_get(sdata, cbss->bssid);
3907 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3912 u32 rates = 0, basic_rates = 0;
3913 bool have_higher_than_11mbit;
3914 int min_rate = INT_MAX, min_rate_index = -1;
3915 struct ieee80211_chanctx_conf *chanctx_conf;
3916 struct ieee80211_supported_band *sband;
3917 const struct cfg80211_bss_ies *ies;
3921 sband = local->hw.wiphy->bands[cbss->channel->band];
3923 err = ieee80211_prep_channel(sdata, cbss);
3925 sta_info_free(local, new_sta);
3928 shift = ieee80211_vif_get_shift(&sdata->vif);
3931 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3932 if (WARN_ON(!chanctx_conf)) {
3936 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3939 ieee80211_get_rates(sband, bss->supp_rates,
3940 bss->supp_rates_len,
3941 &rates, &basic_rates,
3942 &have_higher_than_11mbit,
3943 &min_rate, &min_rate_index,
3947 * This used to be a workaround for basic rates missing
3948 * in the association response frame. Now that we no
3949 * longer use the basic rates from there, it probably
3950 * doesn't happen any more, but keep the workaround so
3951 * in case some *other* APs are buggy in different ways
3952 * we can connect -- with a warning.
3954 if (!basic_rates && min_rate_index >= 0) {
3956 "No basic rates, using min rate instead\n");
3957 basic_rates = BIT(min_rate_index);
3960 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3961 sdata->vif.bss_conf.basic_rates = basic_rates;
3963 /* cf. IEEE 802.11 9.2.12 */
3964 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3965 have_higher_than_11mbit)
3966 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3968 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3970 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3972 /* set timing information */
3973 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3975 ies = rcu_dereference(cbss->beacon_ies);
3979 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3980 sdata->vif.bss_conf.sync_device_ts =
3981 bss->device_ts_beacon;
3982 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3983 ies->data, ies->len);
3984 if (tim_ie && tim_ie[1] >= 2)
3985 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3987 sdata->vif.bss_conf.sync_dtim_count = 0;
3988 } else if (!(local->hw.flags &
3989 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3990 ies = rcu_dereference(cbss->proberesp_ies);
3991 /* must be non-NULL since beacon IEs were NULL */
3992 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3993 sdata->vif.bss_conf.sync_device_ts =
3994 bss->device_ts_presp;
3995 sdata->vif.bss_conf.sync_dtim_count = 0;
3997 sdata->vif.bss_conf.sync_tsf = 0;
3998 sdata->vif.bss_conf.sync_device_ts = 0;
3999 sdata->vif.bss_conf.sync_dtim_count = 0;
4003 /* tell driver about BSSID, basic rates and timing */
4004 ieee80211_bss_info_change_notify(sdata,
4005 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4006 BSS_CHANGED_BEACON_INT);
4009 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4011 err = sta_info_insert(new_sta);
4015 "failed to insert STA entry for the AP (error %d)\n",
4020 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4026 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4027 struct cfg80211_auth_request *req)
4029 struct ieee80211_local *local = sdata->local;
4030 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4031 struct ieee80211_mgd_auth_data *auth_data;
4035 /* prepare auth data structure */
4037 switch (req->auth_type) {
4038 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4039 auth_alg = WLAN_AUTH_OPEN;
4041 case NL80211_AUTHTYPE_SHARED_KEY:
4042 if (IS_ERR(local->wep_tx_tfm))
4044 auth_alg = WLAN_AUTH_SHARED_KEY;
4046 case NL80211_AUTHTYPE_FT:
4047 auth_alg = WLAN_AUTH_FT;
4049 case NL80211_AUTHTYPE_NETWORK_EAP:
4050 auth_alg = WLAN_AUTH_LEAP;
4052 case NL80211_AUTHTYPE_SAE:
4053 auth_alg = WLAN_AUTH_SAE;
4059 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4060 req->ie_len, GFP_KERNEL);
4064 auth_data->bss = req->bss;
4066 if (req->sae_data_len >= 4) {
4067 __le16 *pos = (__le16 *) req->sae_data;
4068 auth_data->sae_trans = le16_to_cpu(pos[0]);
4069 auth_data->sae_status = le16_to_cpu(pos[1]);
4070 memcpy(auth_data->data, req->sae_data + 4,
4071 req->sae_data_len - 4);
4072 auth_data->data_len += req->sae_data_len - 4;
4075 if (req->ie && req->ie_len) {
4076 memcpy(&auth_data->data[auth_data->data_len],
4077 req->ie, req->ie_len);
4078 auth_data->data_len += req->ie_len;
4081 if (req->key && req->key_len) {
4082 auth_data->key_len = req->key_len;
4083 auth_data->key_idx = req->key_idx;
4084 memcpy(auth_data->key, req->key, req->key_len);
4087 auth_data->algorithm = auth_alg;
4089 /* try to authenticate/probe */
4091 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4092 ifmgd->assoc_data) {
4097 if (ifmgd->auth_data)
4098 ieee80211_destroy_auth_data(sdata, false);
4100 /* prep auth_data so we don't go into idle on disassoc */
4101 ifmgd->auth_data = auth_data;
4103 if (ifmgd->associated) {
4104 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4106 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4107 WLAN_REASON_UNSPECIFIED,
4110 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4114 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4116 err = ieee80211_prep_connection(sdata, req->bss, false);
4120 err = ieee80211_probe_auth(sdata);
4122 sta_info_destroy_addr(sdata, req->bss->bssid);
4126 /* hold our own reference */
4127 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4131 memset(ifmgd->bssid, 0, ETH_ALEN);
4132 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4133 ifmgd->auth_data = NULL;
4139 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4140 const u8 *wmm_param, int len)
4148 if (wmm_param[5] != 1 /* version */)
4151 pos = wmm_param + 8;
4154 for (; left >= 4; left -= 4, pos += 4) {
4155 u8 aifsn = pos[0] & 0x0f;
4156 u8 ecwmin = pos[1] & 0x0f;
4157 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4158 int aci = (pos[0] >> 5) & 0x03;
4162 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4166 if (ecwmin > ecwmax) {
4168 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4169 ecwmin, ecwmax, aci);
4177 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4178 struct cfg80211_assoc_request *req)
4180 struct ieee80211_local *local = sdata->local;
4181 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4182 struct ieee80211_bss *bss = (void *)req->bss->priv;
4183 struct ieee80211_mgd_assoc_data *assoc_data;
4184 const struct cfg80211_bss_ies *beacon_ies;
4185 struct ieee80211_supported_band *sband;
4186 const u8 *ssidie, *ht_ie, *vht_ie;
4189 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4194 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4200 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4201 assoc_data->ssid_len = ssidie[1];
4204 if (ifmgd->associated) {
4205 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4207 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4208 WLAN_REASON_UNSPECIFIED,
4211 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4215 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4220 if (ifmgd->assoc_data) {
4225 if (ifmgd->auth_data) {
4228 /* keep sta info, bssid if matching */
4229 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4230 ieee80211_destroy_auth_data(sdata, match);
4233 /* prepare assoc data */
4235 ifmgd->beacon_crc_valid = false;
4237 assoc_data->wmm = bss->wmm_used &&
4238 (local->hw.queues >= IEEE80211_NUM_ACS);
4239 if (assoc_data->wmm) {
4240 /* try to check validity of WMM params IE */
4241 const struct cfg80211_bss_ies *ies;
4242 const u8 *wp, *start, *end;
4245 ies = rcu_dereference(req->bss->ies);
4247 end = start + ies->len;
4250 wp = cfg80211_find_vendor_ie(
4252 WLAN_OUI_TYPE_MICROSOFT_WMM,
4253 start, end - start);
4256 start = wp + wp[1] + 2;
4257 /* if this IE is too short, try the next */
4260 /* if this IE is WMM params, we found what we wanted */
4265 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4267 assoc_data->wmm = false;
4268 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4274 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4275 * We still associate in non-HT mode (11a/b/g) if any one of these
4276 * ciphers is configured as pairwise.
4277 * We can set this to true for non-11n hardware, that'll be checked
4278 * separately along with the peer capabilities.
4280 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4281 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4282 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4283 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4284 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4285 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4286 netdev_info(sdata->dev,
4287 "disabling HT/VHT due to WEP/TKIP use\n");
4291 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4292 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4293 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4296 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4297 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4299 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4300 sband = local->hw.wiphy->bands[req->bss->channel->band];
4301 if (!sband->ht_cap.ht_supported ||
4302 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4303 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4304 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4305 if (!bss->wmm_used &&
4306 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4307 netdev_info(sdata->dev,
4308 "disabling HT as WMM/QoS is not supported by the AP\n");
4311 /* disable VHT if we don't support it or the AP doesn't use WMM */
4312 if (!sband->vht_cap.vht_supported ||
4313 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4314 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4315 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4316 if (!bss->wmm_used &&
4317 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4318 netdev_info(sdata->dev,
4319 "disabling VHT as WMM/QoS is not supported by the AP\n");
4322 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4323 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4324 sizeof(ifmgd->ht_capa_mask));
4326 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4327 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4328 sizeof(ifmgd->vht_capa_mask));
4330 if (req->ie && req->ie_len) {
4331 memcpy(assoc_data->ie, req->ie, req->ie_len);
4332 assoc_data->ie_len = req->ie_len;
4335 assoc_data->bss = req->bss;
4337 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4338 if (ifmgd->powersave)
4339 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4341 sdata->smps_mode = IEEE80211_SMPS_OFF;
4343 sdata->smps_mode = ifmgd->req_smps;
4345 assoc_data->capability = req->bss->capability;
4346 assoc_data->supp_rates = bss->supp_rates;
4347 assoc_data->supp_rates_len = bss->supp_rates_len;
4350 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4351 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4352 assoc_data->ap_ht_param =
4353 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4355 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4356 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4357 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4358 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4359 sizeof(struct ieee80211_vht_cap));
4361 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4364 if (bss->wmm_used && bss->uapsd_supported &&
4365 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4366 sdata->wmm_acm != 0xff) {
4367 assoc_data->uapsd = true;
4368 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4370 assoc_data->uapsd = false;
4371 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4374 if (req->prev_bssid)
4375 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4378 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4379 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4381 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4382 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4385 if (req->crypto.control_port)
4386 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4388 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4390 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4391 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4393 /* kick off associate process */
4395 ifmgd->assoc_data = assoc_data;
4396 ifmgd->dtim_period = 0;
4397 ifmgd->have_beacon = false;
4399 err = ieee80211_prep_connection(sdata, req->bss, true);
4404 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4406 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4409 * Wait up to one beacon interval ...
4410 * should this be more if we miss one?
4412 sdata_info(sdata, "waiting for beacon from %pM\n",
4414 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4415 assoc_data->timeout_started = true;
4416 assoc_data->need_beacon = true;
4417 } else if (beacon_ies) {
4418 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4423 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4424 const struct ieee80211_tim_ie *tim;
4425 tim = (void *)(tim_ie + 2);
4426 ifmgd->dtim_period = tim->dtim_period;
4427 dtim_count = tim->dtim_count;
4429 ifmgd->have_beacon = true;
4430 assoc_data->timeout = jiffies;
4431 assoc_data->timeout_started = true;
4433 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4434 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4435 sdata->vif.bss_conf.sync_device_ts =
4436 bss->device_ts_beacon;
4437 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4440 assoc_data->timeout = jiffies;
4441 assoc_data->timeout_started = true;
4445 run_again(sdata, assoc_data->timeout);
4447 if (bss->corrupt_data) {
4448 char *corrupt_type = "data";
4449 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4450 if (bss->corrupt_data &
4451 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4452 corrupt_type = "beacon and probe response";
4454 corrupt_type = "beacon";
4455 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4456 corrupt_type = "probe response";
4457 sdata_info(sdata, "associating with AP with corrupt %s\n",
4463 memset(ifmgd->bssid, 0, ETH_ALEN);
4464 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4465 ifmgd->assoc_data = NULL;
4471 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4472 struct cfg80211_deauth_request *req)
4474 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4475 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4476 bool tx = !req->local_state_change;
4477 bool report_frame = false;
4480 "deauthenticating from %pM by local choice (reason=%d)\n",
4481 req->bssid, req->reason_code);
4483 if (ifmgd->auth_data) {
4484 drv_mgd_prepare_tx(sdata->local, sdata);
4485 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4486 IEEE80211_STYPE_DEAUTH,
4487 req->reason_code, tx,
4489 ieee80211_destroy_auth_data(sdata, false);
4491 report_frame = true;
4495 if (ifmgd->associated &&
4496 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4497 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4498 req->reason_code, tx, frame_buf);
4499 report_frame = true;
4504 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4505 IEEE80211_DEAUTH_FRAME_LEN);
4510 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4511 struct cfg80211_disassoc_request *req)
4513 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4515 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4518 * cfg80211 should catch this ... but it's racy since
4519 * we can receive a disassoc frame, process it, hand it
4520 * to cfg80211 while that's in a locked section already
4521 * trying to tell us that the user wants to disconnect.
4523 if (ifmgd->associated != req->bss)
4527 "disassociating from %pM by local choice (reason=%d)\n",
4528 req->bss->bssid, req->reason_code);
4530 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4531 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4532 req->reason_code, !req->local_state_change,
4535 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4536 IEEE80211_DEAUTH_FRAME_LEN);
4541 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4543 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4546 * Make sure some work items will not run after this,
4547 * they will not do anything but might not have been
4548 * cancelled when disconnecting.
4550 cancel_work_sync(&ifmgd->monitor_work);
4551 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4552 cancel_work_sync(&ifmgd->request_smps_work);
4553 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4554 cancel_work_sync(&ifmgd->chswitch_work);
4557 if (ifmgd->assoc_data) {
4558 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4559 ieee80211_destroy_assoc_data(sdata, false);
4560 cfg80211_assoc_timeout(sdata->dev, bss);
4562 if (ifmgd->auth_data)
4563 ieee80211_destroy_auth_data(sdata, false);
4564 del_timer_sync(&ifmgd->timer);
4565 sdata_unlock(sdata);
4568 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4569 enum nl80211_cqm_rssi_threshold_event rssi_event,
4572 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4574 trace_api_cqm_rssi_notify(sdata, rssi_event);
4576 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4578 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);