2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/delay.h>
16 #include <linux/if_ether.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
20 #include <linux/moduleparam.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/pm_qos.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42 #define IEEE80211_ASSOC_MAX_TRIES 3
44 static int max_nullfunc_tries = 2;
45 module_param(max_nullfunc_tries, int, 0644);
46 MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49 static int max_probe_tries = 5;
50 module_param(max_probe_tries, int, 0644);
51 MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
62 static int beacon_loss_count = 7;
63 module_param(beacon_loss_count, int, 0644);
64 MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
77 static int probe_wait_ms = 500;
78 module_param(probe_wait_ms, int, 0644);
79 MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
88 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
106 static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
109 sdata_assert_lock(sdata);
111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
132 if (unlikely(!sdata->u.mgd.associated))
135 ifmgd->probe_send_count = 0;
137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
144 static int ecw2cw(int ecw)
146 return (1 << ecw) - 1;
150 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
153 const struct ieee80211_ht_cap *ht_cap,
154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
156 struct cfg80211_chan_def *chandef, bool tracking)
158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159 struct cfg80211_chan_def vht_chandef;
160 struct ieee80211_sta_ht_cap sta_ht_cap;
163 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
164 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
166 chandef->chan = channel;
167 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
168 chandef->center_freq1 = channel->center_freq;
169 chandef->center_freq2 = 0;
171 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
172 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
176 chandef->width = NL80211_CHAN_WIDTH_20;
178 if (!(ht_cap->cap_info &
179 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
180 ret = IEEE80211_STA_DISABLE_40MHZ;
181 vht_chandef = *chandef;
185 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
187 /* check that channel matches the right operating channel */
188 if (!tracking && channel->center_freq != ht_cfreq) {
190 * It's possible that some APs are confused here;
191 * Netgear WNDR3700 sometimes reports 4 higher than
192 * the actual channel in association responses, but
193 * since we look at probe response/beacon data here
197 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
198 channel->center_freq, ht_cfreq,
199 ht_oper->primary_chan, channel->band);
200 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
204 /* check 40 MHz support, if we have it */
205 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
206 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
207 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
208 chandef->width = NL80211_CHAN_WIDTH_40;
209 chandef->center_freq1 += 10;
211 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
212 chandef->width = NL80211_CHAN_WIDTH_40;
213 chandef->center_freq1 -= 10;
217 /* 40 MHz (and 80 MHz) must be supported for VHT */
218 ret = IEEE80211_STA_DISABLE_VHT;
219 /* also mark 40 MHz disabled */
220 ret |= IEEE80211_STA_DISABLE_40MHZ;
224 if (!vht_oper || !sband->vht_cap.vht_supported) {
225 ret = IEEE80211_STA_DISABLE_VHT;
229 vht_chandef.chan = channel;
230 vht_chandef.center_freq1 =
231 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
233 vht_chandef.center_freq2 = 0;
235 switch (vht_oper->chan_width) {
236 case IEEE80211_VHT_CHANWIDTH_USE_HT:
237 vht_chandef.width = chandef->width;
238 vht_chandef.center_freq1 = chandef->center_freq1;
240 case IEEE80211_VHT_CHANWIDTH_80MHZ:
241 vht_chandef.width = NL80211_CHAN_WIDTH_80;
243 case IEEE80211_VHT_CHANWIDTH_160MHZ:
244 vht_chandef.width = NL80211_CHAN_WIDTH_160;
246 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
247 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
248 vht_chandef.center_freq2 =
249 ieee80211_channel_to_frequency(
250 vht_oper->center_freq_seg2_idx,
254 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
256 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
257 vht_oper->chan_width);
258 ret = IEEE80211_STA_DISABLE_VHT;
262 if (!cfg80211_chandef_valid(&vht_chandef)) {
263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
265 "AP VHT information is invalid, disable VHT\n");
266 ret = IEEE80211_STA_DISABLE_VHT;
270 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
275 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
276 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
278 "AP VHT information doesn't match HT, disable VHT\n");
279 ret = IEEE80211_STA_DISABLE_VHT;
283 *chandef = vht_chandef;
289 * When tracking the current AP, don't do any further checks if the
290 * new chandef is identical to the one we're currently using for the
291 * connection. This keeps us from playing ping-pong with regulatory,
292 * without it the following can happen (for example):
293 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
294 * - AP advertises regdom US
295 * - CRDA loads regdom US with 80 MHz prohibited (old database)
296 * - the code below detects an unsupported channel, downgrades, and
297 * we disconnect from the AP in the caller
298 * - disconnect causes CRDA to reload world regdomain and the game
300 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
302 * It seems possible that there are still scenarios with CSA or real
303 * bandwidth changes where a this could happen, but those cases are
304 * less common and wouldn't completely prevent using the AP.
307 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
310 /* don't print the message below for VHT mismatch if VHT is disabled */
311 if (ret & IEEE80211_STA_DISABLE_VHT)
312 vht_chandef = *chandef;
315 * Ignore the DISABLED flag when we're already connected and only
316 * tracking the APs beacon for bandwidth changes - otherwise we
317 * might get disconnected here if we connect to an AP, update our
318 * regulatory information based on the AP's country IE and the
319 * information we have is wrong/outdated and disables the channel
320 * that we're actually using for the connection to the AP.
322 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
324 IEEE80211_CHAN_DISABLED)) {
325 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
326 ret = IEEE80211_STA_DISABLE_HT |
327 IEEE80211_STA_DISABLE_VHT;
331 ret |= ieee80211_chandef_downgrade(chandef);
334 if (chandef->width != vht_chandef.width && !tracking)
336 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
338 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
342 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
343 struct sta_info *sta,
344 const struct ieee80211_ht_cap *ht_cap,
345 const struct ieee80211_ht_operation *ht_oper,
346 const struct ieee80211_vht_operation *vht_oper,
347 const u8 *bssid, u32 *changed)
349 struct ieee80211_local *local = sdata->local;
350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
351 struct ieee80211_supported_band *sband;
352 struct ieee80211_channel *chan;
353 struct cfg80211_chan_def chandef;
356 enum ieee80211_sta_rx_bandwidth new_sta_bw;
359 /* if HT was/is disabled, don't track any bandwidth changes */
360 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
363 /* don't check VHT if we associated as non-VHT station */
364 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
367 if (WARN_ON_ONCE(!sta))
371 * if bss configuration changed store the new one -
372 * this may be applicable even if channel is identical
374 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
375 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
376 *changed |= BSS_CHANGED_HT;
377 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
380 chan = sdata->vif.bss_conf.chandef.chan;
381 sband = local->hw.wiphy->bands[chan->band];
383 /* calculate new channel (type) based on HT/VHT operation IEs */
384 flags = ieee80211_determine_chantype(sdata, sband, chan,
385 ht_cap, ht_oper, vht_oper,
389 * Downgrade the new channel if we associated with restricted
390 * capabilities. For example, if we associated as a 20 MHz STA
391 * to a 40 MHz AP (due to regulatory, capabilities or config
392 * reasons) then switching to a 40 MHz channel now won't do us
393 * any good -- we couldn't use it with the AP.
395 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
396 chandef.width == NL80211_CHAN_WIDTH_80P80)
397 flags |= ieee80211_chandef_downgrade(&chandef);
398 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
399 chandef.width == NL80211_CHAN_WIDTH_160)
400 flags |= ieee80211_chandef_downgrade(&chandef);
401 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
402 chandef.width > NL80211_CHAN_WIDTH_20)
403 flags |= ieee80211_chandef_downgrade(&chandef);
405 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
409 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
410 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
411 chandef.center_freq1, chandef.center_freq2);
413 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
414 IEEE80211_STA_DISABLE_VHT |
415 IEEE80211_STA_DISABLE_40MHZ |
416 IEEE80211_STA_DISABLE_80P80MHZ |
417 IEEE80211_STA_DISABLE_160MHZ)) ||
418 !cfg80211_chandef_valid(&chandef)) {
420 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
425 switch (chandef.width) {
426 case NL80211_CHAN_WIDTH_20_NOHT:
427 case NL80211_CHAN_WIDTH_20:
428 new_sta_bw = IEEE80211_STA_RX_BW_20;
430 case NL80211_CHAN_WIDTH_40:
431 new_sta_bw = IEEE80211_STA_RX_BW_40;
433 case NL80211_CHAN_WIDTH_80:
434 new_sta_bw = IEEE80211_STA_RX_BW_80;
436 case NL80211_CHAN_WIDTH_80P80:
437 case NL80211_CHAN_WIDTH_160:
438 new_sta_bw = IEEE80211_STA_RX_BW_160;
444 if (new_sta_bw > sta->cur_max_bandwidth)
445 new_sta_bw = sta->cur_max_bandwidth;
447 if (new_sta_bw < sta->sta.bandwidth) {
448 sta->sta.bandwidth = new_sta_bw;
449 rate_control_rate_update(local, sband, sta,
450 IEEE80211_RC_BW_CHANGED);
453 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
456 "AP %pM changed bandwidth to incompatible one - disconnect\n",
461 if (new_sta_bw > sta->sta.bandwidth) {
462 sta->sta.bandwidth = new_sta_bw;
463 rate_control_rate_update(local, sband, sta,
464 IEEE80211_RC_BW_CHANGED);
470 /* frame sending functions */
472 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
473 struct sk_buff *skb, u8 ap_ht_param,
474 struct ieee80211_supported_band *sband,
475 struct ieee80211_channel *channel,
476 enum ieee80211_smps_mode smps)
479 u32 flags = channel->flags;
481 struct ieee80211_sta_ht_cap ht_cap;
483 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
485 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
486 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
488 /* determine capability flags */
491 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
492 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
493 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
494 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
495 cap &= ~IEEE80211_HT_CAP_SGI_40;
498 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
499 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
500 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
501 cap &= ~IEEE80211_HT_CAP_SGI_40;
507 * If 40 MHz was disabled associate as though we weren't
508 * capable of 40 MHz -- some broken APs will never fall
509 * back to trying to transmit in 20 MHz.
511 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
512 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
513 cap &= ~IEEE80211_HT_CAP_SGI_40;
516 /* set SM PS mode properly */
517 cap &= ~IEEE80211_HT_CAP_SM_PS;
519 case IEEE80211_SMPS_AUTOMATIC:
520 case IEEE80211_SMPS_NUM_MODES:
522 case IEEE80211_SMPS_OFF:
523 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
524 IEEE80211_HT_CAP_SM_PS_SHIFT;
526 case IEEE80211_SMPS_STATIC:
527 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
528 IEEE80211_HT_CAP_SM_PS_SHIFT;
530 case IEEE80211_SMPS_DYNAMIC:
531 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
532 IEEE80211_HT_CAP_SM_PS_SHIFT;
536 /* reserve and fill IE */
537 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
538 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
541 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
543 struct ieee80211_supported_band *sband,
544 struct ieee80211_vht_cap *ap_vht_cap)
548 struct ieee80211_sta_vht_cap vht_cap;
549 u32 mask, ap_bf_sts, our_bf_sts;
551 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
553 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
554 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
556 /* determine capability flags */
559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
560 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
562 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
563 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
564 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
565 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
568 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
569 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
570 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
574 * Some APs apparently get confused if our capabilities are better
575 * than theirs, so restrict what we advertise in the assoc request.
577 if (!(ap_vht_cap->vht_cap_info &
578 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
579 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
581 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
583 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
584 our_bf_sts = cap & mask;
586 if (ap_bf_sts < our_bf_sts) {
591 /* reserve and fill IE */
592 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
593 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
596 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
598 struct ieee80211_local *local = sdata->local;
599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
600 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
602 struct ieee80211_mgmt *mgmt;
604 size_t offset = 0, noffset;
605 int i, count, rates_len, supp_rates_len, shift;
607 struct ieee80211_supported_band *sband;
608 struct ieee80211_chanctx_conf *chanctx_conf;
609 struct ieee80211_channel *chan;
610 u32 rate_flags, rates = 0;
612 sdata_assert_lock(sdata);
615 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
616 if (WARN_ON(!chanctx_conf)) {
620 chan = chanctx_conf->def.chan;
621 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
623 sband = local->hw.wiphy->bands[chan->band];
624 shift = ieee80211_vif_get_shift(&sdata->vif);
626 if (assoc_data->supp_rates_len) {
628 * Get all rates supported by the device and the AP as
629 * some APs don't like getting a superset of their rates
630 * in the association request (e.g. D-Link DAP 1353 in
633 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
634 assoc_data->supp_rates,
635 assoc_data->supp_rates_len,
639 * In case AP not provide any supported rates information
640 * before association, we send information element(s) with
641 * all rates that we support.
644 for (i = 0; i < sband->n_bitrates; i++) {
645 if ((rate_flags & sband->bitrates[i].flags)
653 skb = alloc_skb(local->hw.extra_tx_headroom +
654 sizeof(*mgmt) + /* bit too much but doesn't matter */
655 2 + assoc_data->ssid_len + /* SSID */
656 4 + rates_len + /* (extended) rates */
657 4 + /* power capability */
658 2 + 2 * sband->n_channels + /* supported channels */
659 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
660 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
661 assoc_data->ie_len + /* extra IEs */
667 skb_reserve(skb, local->hw.extra_tx_headroom);
669 capab = WLAN_CAPABILITY_ESS;
671 if (sband->band == IEEE80211_BAND_2GHZ) {
672 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
673 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
674 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
675 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
678 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
679 capab |= WLAN_CAPABILITY_PRIVACY;
681 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
682 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
683 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
685 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
686 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
688 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
690 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
691 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
692 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
694 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_REASSOC_REQ);
698 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.reassoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
705 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
706 IEEE80211_STYPE_ASSOC_REQ);
707 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
708 mgmt->u.assoc_req.listen_interval =
709 cpu_to_le16(local->hw.conf.listen_interval);
713 pos = skb_put(skb, 2 + assoc_data->ssid_len);
714 *pos++ = WLAN_EID_SSID;
715 *pos++ = assoc_data->ssid_len;
716 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
718 /* add all rates which were marked to be used above */
719 supp_rates_len = rates_len;
720 if (supp_rates_len > 8)
723 pos = skb_put(skb, supp_rates_len + 2);
724 *pos++ = WLAN_EID_SUPP_RATES;
725 *pos++ = supp_rates_len;
728 for (i = 0; i < sband->n_bitrates; i++) {
729 if (BIT(i) & rates) {
730 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
738 if (rates_len > count) {
739 pos = skb_put(skb, rates_len - count + 2);
740 *pos++ = WLAN_EID_EXT_SUPP_RATES;
741 *pos++ = rates_len - count;
743 for (i++; i < sband->n_bitrates; i++) {
744 if (BIT(i) & rates) {
746 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
753 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
754 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
755 pos = skb_put(skb, 4);
756 *pos++ = WLAN_EID_PWR_CAPABILITY;
758 *pos++ = 0; /* min tx power */
760 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
763 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
764 /* TODO: get this in reg domain format */
765 pos = skb_put(skb, 2 * sband->n_channels + 2);
766 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
767 *pos++ = 2 * sband->n_channels;
768 for (i = 0; i < sband->n_channels; i++) {
769 *pos++ = ieee80211_frequency_to_channel(
770 sband->channels[i].center_freq);
771 *pos++ = 1; /* one channel in the subband*/
775 /* if present, add any custom IEs that go before HT */
776 if (assoc_data->ie_len) {
777 static const u8 before_ht[] = {
780 WLAN_EID_EXT_SUPP_RATES,
781 WLAN_EID_PWR_CAPABILITY,
782 WLAN_EID_SUPPORTED_CHANNELS,
785 WLAN_EID_RRM_ENABLED_CAPABILITIES,
786 WLAN_EID_MOBILITY_DOMAIN,
787 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
788 WLAN_EID_RIC_DATA, /* reassoc only */
789 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
791 static const u8 after_ric[] = {
792 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
793 WLAN_EID_HT_CAPABILITY,
794 WLAN_EID_BSS_COEX_2040,
795 WLAN_EID_EXT_CAPABILITY,
796 WLAN_EID_QOS_TRAFFIC_CAPA,
797 WLAN_EID_TIM_BCAST_REQ,
798 WLAN_EID_INTERWORKING,
799 /* 60GHz doesn't happen right now */
800 WLAN_EID_VHT_CAPABILITY,
801 WLAN_EID_OPMODE_NOTIF,
804 noffset = ieee80211_ie_split_ric(assoc_data->ie,
807 ARRAY_SIZE(before_ht),
809 ARRAY_SIZE(after_ric),
811 pos = skb_put(skb, noffset - offset);
812 memcpy(pos, assoc_data->ie + offset, noffset - offset);
816 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
817 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
818 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
820 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
821 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
822 sband, chan, sdata->smps_mode);
824 /* if present, add any custom IEs that go before VHT */
825 if (assoc_data->ie_len) {
826 static const u8 before_vht[] = {
829 WLAN_EID_EXT_SUPP_RATES,
830 WLAN_EID_PWR_CAPABILITY,
831 WLAN_EID_SUPPORTED_CHANNELS,
834 WLAN_EID_RRM_ENABLED_CAPABILITIES,
835 WLAN_EID_MOBILITY_DOMAIN,
836 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
837 WLAN_EID_HT_CAPABILITY,
838 WLAN_EID_BSS_COEX_2040,
839 WLAN_EID_EXT_CAPABILITY,
840 WLAN_EID_QOS_TRAFFIC_CAPA,
841 WLAN_EID_TIM_BCAST_REQ,
842 WLAN_EID_INTERWORKING,
845 /* RIC already taken above, so no need to handle here anymore */
846 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
847 before_vht, ARRAY_SIZE(before_vht),
849 pos = skb_put(skb, noffset - offset);
850 memcpy(pos, assoc_data->ie + offset, noffset - offset);
854 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
855 ieee80211_add_vht_ie(sdata, skb, sband,
856 &assoc_data->ap_vht_cap);
858 /* if present, add any custom non-vendor IEs that go after HT */
859 if (assoc_data->ie_len) {
860 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
863 pos = skb_put(skb, noffset - offset);
864 memcpy(pos, assoc_data->ie + offset, noffset - offset);
868 if (assoc_data->wmm) {
869 if (assoc_data->uapsd) {
870 qos_info = ifmgd->uapsd_queues;
871 qos_info |= (ifmgd->uapsd_max_sp_len <<
872 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
877 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
880 /* add any remaining custom (i.e. vendor specific here) IEs */
881 if (assoc_data->ie_len) {
882 noffset = assoc_data->ie_len;
883 pos = skb_put(skb, noffset - offset);
884 memcpy(pos, assoc_data->ie + offset, noffset - offset);
887 drv_mgd_prepare_tx(local, sdata);
889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
890 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
891 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
892 IEEE80211_TX_INTFL_MLME_CONN_TX;
893 ieee80211_tx_skb(sdata, skb);
896 void ieee80211_send_pspoll(struct ieee80211_local *local,
897 struct ieee80211_sub_if_data *sdata)
899 struct ieee80211_pspoll *pspoll;
902 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
906 pspoll = (struct ieee80211_pspoll *) skb->data;
907 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
909 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
910 ieee80211_tx_skb(sdata, skb);
913 void ieee80211_send_nullfunc(struct ieee80211_local *local,
914 struct ieee80211_sub_if_data *sdata,
918 struct ieee80211_hdr_3addr *nullfunc;
919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
921 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
925 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
927 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
929 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
930 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
932 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
933 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
935 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
936 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
938 ieee80211_tx_skb(sdata, skb);
941 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
942 struct ieee80211_sub_if_data *sdata)
945 struct ieee80211_hdr *nullfunc;
948 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
951 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
955 skb_reserve(skb, local->hw.extra_tx_headroom);
957 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
958 memset(nullfunc, 0, 30);
959 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
960 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
961 nullfunc->frame_control = fc;
962 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
963 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
964 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
965 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
967 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
968 ieee80211_tx_skb(sdata, skb);
971 /* spectrum management related things */
972 static void ieee80211_chswitch_work(struct work_struct *work)
974 struct ieee80211_sub_if_data *sdata =
975 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
976 struct ieee80211_local *local = sdata->local;
977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
980 if (!ieee80211_sdata_running(sdata))
984 mutex_lock(&local->mtx);
985 mutex_lock(&local->chanctx_mtx);
987 if (!ifmgd->associated)
990 if (!sdata->vif.csa_active)
994 * using reservation isn't immediate as it may be deferred until later
995 * with multi-vif. once reservation is complete it will re-schedule the
996 * work with no reserved_chanctx so verify chandef to check if it
997 * completed successfully
1000 if (sdata->reserved_chanctx) {
1002 * with multi-vif csa driver may call ieee80211_csa_finish()
1003 * many times while waiting for other interfaces to use their
1006 if (sdata->reserved_ready)
1009 ret = ieee80211_vif_use_reserved_context(sdata);
1012 "failed to use reserved channel context, disconnecting (err=%d)\n",
1014 ieee80211_queue_work(&sdata->local->hw,
1015 &ifmgd->csa_connection_drop_work);
1022 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1023 &sdata->csa_chandef)) {
1025 "failed to finalize channel switch, disconnecting\n");
1026 ieee80211_queue_work(&sdata->local->hw,
1027 &ifmgd->csa_connection_drop_work);
1031 /* XXX: shouldn't really modify cfg80211-owned data! */
1032 ifmgd->associated->channel = sdata->csa_chandef.chan;
1034 ifmgd->csa_waiting_bcn = true;
1036 ieee80211_sta_reset_beacon_monitor(sdata);
1037 ieee80211_sta_reset_conn_monitor(sdata);
1040 mutex_unlock(&local->chanctx_mtx);
1041 mutex_unlock(&local->mtx);
1042 sdata_unlock(sdata);
1045 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1047 struct ieee80211_local *local = sdata->local;
1048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1051 sdata_assert_lock(sdata);
1053 WARN_ON(!sdata->vif.csa_active);
1055 if (sdata->csa_block_tx) {
1056 ieee80211_wake_vif_queues(local, sdata,
1057 IEEE80211_QUEUE_STOP_REASON_CSA);
1058 sdata->csa_block_tx = false;
1061 sdata->vif.csa_active = false;
1062 ifmgd->csa_waiting_bcn = false;
1064 ret = drv_post_channel_switch(sdata);
1067 "driver post channel switch failed, disconnecting\n");
1068 ieee80211_queue_work(&local->hw,
1069 &ifmgd->csa_connection_drop_work);
1073 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1076 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1078 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1081 trace_api_chswitch_done(sdata, success);
1084 "driver channel switch failed, disconnecting\n");
1085 ieee80211_queue_work(&sdata->local->hw,
1086 &ifmgd->csa_connection_drop_work);
1088 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1091 EXPORT_SYMBOL(ieee80211_chswitch_done);
1093 static void ieee80211_chswitch_timer(unsigned long data)
1095 struct ieee80211_sub_if_data *sdata =
1096 (struct ieee80211_sub_if_data *) data;
1098 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1102 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1103 u64 timestamp, u32 device_timestamp,
1104 struct ieee802_11_elems *elems,
1107 struct ieee80211_local *local = sdata->local;
1108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1109 struct cfg80211_bss *cbss = ifmgd->associated;
1110 struct ieee80211_chanctx_conf *conf;
1111 struct ieee80211_chanctx *chanctx;
1112 enum ieee80211_band current_band;
1113 struct ieee80211_csa_ie csa_ie;
1114 struct ieee80211_channel_switch ch_switch;
1117 sdata_assert_lock(sdata);
1122 if (local->scanning)
1125 /* disregard subsequent announcements if we are already processing */
1126 if (sdata->vif.csa_active)
1129 current_band = cbss->channel->band;
1130 memset(&csa_ie, 0, sizeof(csa_ie));
1131 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1133 ifmgd->associated->bssid, &csa_ie);
1135 ieee80211_queue_work(&local->hw,
1136 &ifmgd->csa_connection_drop_work);
1140 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1141 IEEE80211_CHAN_DISABLED)) {
1143 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1144 ifmgd->associated->bssid,
1145 csa_ie.chandef.chan->center_freq,
1146 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1147 csa_ie.chandef.center_freq2);
1148 ieee80211_queue_work(&local->hw,
1149 &ifmgd->csa_connection_drop_work);
1153 mutex_lock(&local->mtx);
1154 mutex_lock(&local->chanctx_mtx);
1155 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1156 lockdep_is_held(&local->chanctx_mtx));
1159 "no channel context assigned to vif?, disconnecting\n");
1160 ieee80211_queue_work(&local->hw,
1161 &ifmgd->csa_connection_drop_work);
1162 mutex_unlock(&local->chanctx_mtx);
1163 mutex_unlock(&local->mtx);
1167 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1169 if (local->use_chanctx &&
1170 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1172 "driver doesn't support chan-switch with channel contexts\n");
1173 ieee80211_queue_work(&local->hw,
1174 &ifmgd->csa_connection_drop_work);
1175 mutex_unlock(&local->chanctx_mtx);
1176 mutex_unlock(&local->mtx);
1180 ch_switch.timestamp = timestamp;
1181 ch_switch.device_timestamp = device_timestamp;
1182 ch_switch.block_tx = csa_ie.mode;
1183 ch_switch.chandef = csa_ie.chandef;
1184 ch_switch.count = csa_ie.count;
1186 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1188 "preparing for channel switch failed, disconnecting\n");
1189 ieee80211_queue_work(&local->hw,
1190 &ifmgd->csa_connection_drop_work);
1191 mutex_unlock(&local->chanctx_mtx);
1192 mutex_unlock(&local->mtx);
1196 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1197 chanctx->mode, false);
1200 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1202 ieee80211_queue_work(&local->hw,
1203 &ifmgd->csa_connection_drop_work);
1204 mutex_unlock(&local->chanctx_mtx);
1205 mutex_unlock(&local->mtx);
1208 mutex_unlock(&local->chanctx_mtx);
1210 sdata->vif.csa_active = true;
1211 sdata->csa_chandef = csa_ie.chandef;
1212 sdata->csa_block_tx = csa_ie.mode;
1214 if (sdata->csa_block_tx)
1215 ieee80211_stop_vif_queues(local, sdata,
1216 IEEE80211_QUEUE_STOP_REASON_CSA);
1217 mutex_unlock(&local->mtx);
1219 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1222 if (local->ops->channel_switch) {
1223 /* use driver's channel switch callback */
1224 drv_channel_switch(local, sdata, &ch_switch);
1228 /* channel switch handled in software */
1229 if (csa_ie.count <= 1)
1230 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1232 mod_timer(&ifmgd->chswitch_timer,
1233 TU_TO_EXP_TIME((csa_ie.count - 1) *
1234 cbss->beacon_interval));
1238 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1239 struct ieee80211_channel *channel,
1240 const u8 *country_ie, u8 country_ie_len,
1241 const u8 *pwr_constr_elem,
1242 int *chan_pwr, int *pwr_reduction)
1244 struct ieee80211_country_ie_triplet *triplet;
1245 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1246 int i, chan_increment;
1247 bool have_chan_pwr = false;
1250 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1253 triplet = (void *)(country_ie + 3);
1254 country_ie_len -= 3;
1256 switch (channel->band) {
1260 case IEEE80211_BAND_2GHZ:
1261 case IEEE80211_BAND_60GHZ:
1264 case IEEE80211_BAND_5GHZ:
1270 while (country_ie_len >= 3) {
1271 u8 first_channel = triplet->chans.first_channel;
1273 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1276 for (i = 0; i < triplet->chans.num_channels; i++) {
1277 if (first_channel + i * chan_increment == chan) {
1278 have_chan_pwr = true;
1279 *chan_pwr = triplet->chans.max_power;
1288 country_ie_len -= 3;
1291 if (have_chan_pwr && pwr_constr_elem)
1292 *pwr_reduction = *pwr_constr_elem;
1296 return have_chan_pwr;
1299 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1300 struct ieee80211_channel *channel,
1301 const u8 *cisco_dtpc_ie,
1304 /* From practical testing, the first data byte of the DTPC element
1305 * seems to contain the requested dBm level, and the CLI on Cisco
1306 * APs clearly state the range is -127 to 127 dBm, which indicates
1307 * a signed byte, although it seemingly never actually goes negative.
1308 * The other byte seems to always be zero.
1310 *pwr_level = (__s8)cisco_dtpc_ie[4];
1313 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1314 struct ieee80211_channel *channel,
1315 struct ieee80211_mgmt *mgmt,
1316 const u8 *country_ie, u8 country_ie_len,
1317 const u8 *pwr_constr_ie,
1318 const u8 *cisco_dtpc_ie)
1320 bool has_80211h_pwr = false, has_cisco_pwr = false;
1321 int chan_pwr = 0, pwr_reduction_80211h = 0;
1322 int pwr_level_cisco, pwr_level_80211h;
1324 __le16 capab = mgmt->u.probe_resp.capab_info;
1327 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1328 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1329 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1330 sdata, channel, country_ie, country_ie_len,
1331 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1333 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1336 if (cisco_dtpc_ie) {
1337 ieee80211_find_cisco_dtpc(
1338 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1339 has_cisco_pwr = true;
1342 if (!has_80211h_pwr && !has_cisco_pwr)
1345 /* If we have both 802.11h and Cisco DTPC, apply both limits
1346 * by picking the smallest of the two power levels advertised.
1348 if (has_80211h_pwr &&
1349 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1351 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1352 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1353 sdata->u.mgd.bssid);
1354 new_ap_level = pwr_level_80211h;
1355 } else { /* has_cisco_pwr is always true here. */
1357 "Limiting TX power to %d dBm as advertised by %pM\n",
1358 pwr_level_cisco, sdata->u.mgd.bssid);
1359 new_ap_level = pwr_level_cisco;
1362 if (sdata->ap_power_level == new_ap_level)
1365 sdata->ap_power_level = new_ap_level;
1366 if (__ieee80211_recalc_txpower(sdata))
1367 return BSS_CHANGED_TXPOWER;
1372 static void ieee80211_enable_ps(struct ieee80211_local *local,
1373 struct ieee80211_sub_if_data *sdata)
1375 struct ieee80211_conf *conf = &local->hw.conf;
1378 * If we are scanning right now then the parameters will
1379 * take effect when scan finishes.
1381 if (local->scanning)
1384 if (conf->dynamic_ps_timeout > 0 &&
1385 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1386 mod_timer(&local->dynamic_ps_timer, jiffies +
1387 msecs_to_jiffies(conf->dynamic_ps_timeout));
1389 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1390 ieee80211_send_nullfunc(local, sdata, 1);
1392 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1393 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1396 conf->flags |= IEEE80211_CONF_PS;
1397 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1401 static void ieee80211_change_ps(struct ieee80211_local *local)
1403 struct ieee80211_conf *conf = &local->hw.conf;
1405 if (local->ps_sdata) {
1406 ieee80211_enable_ps(local, local->ps_sdata);
1407 } else if (conf->flags & IEEE80211_CONF_PS) {
1408 conf->flags &= ~IEEE80211_CONF_PS;
1409 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1410 del_timer_sync(&local->dynamic_ps_timer);
1411 cancel_work_sync(&local->dynamic_ps_enable_work);
1415 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1417 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1418 struct sta_info *sta = NULL;
1419 bool authorized = false;
1421 if (!mgd->powersave)
1427 if (!mgd->associated)
1430 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1433 if (!mgd->have_beacon)
1437 sta = sta_info_get(sdata, mgd->bssid);
1439 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1445 /* need to hold RTNL or interface lock */
1446 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1448 struct ieee80211_sub_if_data *sdata, *found = NULL;
1452 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1453 local->ps_sdata = NULL;
1457 list_for_each_entry(sdata, &local->interfaces, list) {
1458 if (!ieee80211_sdata_running(sdata))
1460 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1461 /* If an AP vif is found, then disable PS
1462 * by setting the count to zero thereby setting
1468 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1474 if (count == 1 && ieee80211_powersave_allowed(found)) {
1478 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1480 beaconint_us = ieee80211_tu_to_usec(
1481 found->vif.bss_conf.beacon_int);
1483 timeout = local->dynamic_ps_forced_timeout;
1486 * Go to full PSM if the user configures a very low
1487 * latency requirement.
1488 * The 2000 second value is there for compatibility
1489 * until the PM_QOS_NETWORK_LATENCY is configured
1492 if (latency > (1900 * USEC_PER_MSEC) &&
1493 latency != (2000 * USEC_PER_SEC))
1498 local->hw.conf.dynamic_ps_timeout = timeout;
1500 if (beaconint_us > latency) {
1501 local->ps_sdata = NULL;
1504 u8 dtimper = found->u.mgd.dtim_period;
1506 /* If the TIM IE is invalid, pretend the value is 1 */
1509 else if (dtimper > 1)
1510 maxslp = min_t(int, dtimper,
1511 latency / beaconint_us);
1513 local->hw.conf.max_sleep_period = maxslp;
1514 local->hw.conf.ps_dtim_period = dtimper;
1515 local->ps_sdata = found;
1518 local->ps_sdata = NULL;
1521 ieee80211_change_ps(local);
1524 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1526 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1528 if (sdata->vif.bss_conf.ps != ps_allowed) {
1529 sdata->vif.bss_conf.ps = ps_allowed;
1530 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1534 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1536 struct ieee80211_local *local =
1537 container_of(work, struct ieee80211_local,
1538 dynamic_ps_disable_work);
1540 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1541 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1542 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1545 ieee80211_wake_queues_by_reason(&local->hw,
1546 IEEE80211_MAX_QUEUE_MAP,
1547 IEEE80211_QUEUE_STOP_REASON_PS,
1551 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1553 struct ieee80211_local *local =
1554 container_of(work, struct ieee80211_local,
1555 dynamic_ps_enable_work);
1556 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1557 struct ieee80211_if_managed *ifmgd;
1558 unsigned long flags;
1561 /* can only happen when PS was just disabled anyway */
1565 ifmgd = &sdata->u.mgd;
1567 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1570 if (local->hw.conf.dynamic_ps_timeout > 0) {
1571 /* don't enter PS if TX frames are pending */
1572 if (drv_tx_frames_pending(local)) {
1573 mod_timer(&local->dynamic_ps_timer, jiffies +
1575 local->hw.conf.dynamic_ps_timeout));
1580 * transmission can be stopped by others which leads to
1581 * dynamic_ps_timer expiry. Postpone the ps timer if it
1582 * is not the actual idle state.
1584 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1585 for (q = 0; q < local->hw.queues; q++) {
1586 if (local->queue_stop_reasons[q]) {
1587 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1589 mod_timer(&local->dynamic_ps_timer, jiffies +
1591 local->hw.conf.dynamic_ps_timeout));
1595 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1598 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1599 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1600 if (drv_tx_frames_pending(local)) {
1601 mod_timer(&local->dynamic_ps_timer, jiffies +
1603 local->hw.conf.dynamic_ps_timeout));
1605 ieee80211_send_nullfunc(local, sdata, 1);
1606 /* Flush to get the tx status of nullfunc frame */
1607 ieee80211_flush_queues(local, sdata, false);
1611 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1612 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1613 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1614 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1615 local->hw.conf.flags |= IEEE80211_CONF_PS;
1616 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1620 void ieee80211_dynamic_ps_timer(unsigned long data)
1622 struct ieee80211_local *local = (void *) data;
1624 if (local->quiescing || local->suspended)
1627 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1630 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1632 struct delayed_work *delayed_work =
1633 container_of(work, struct delayed_work, work);
1634 struct ieee80211_sub_if_data *sdata =
1635 container_of(delayed_work, struct ieee80211_sub_if_data,
1636 dfs_cac_timer_work);
1637 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1639 mutex_lock(&sdata->local->mtx);
1640 if (sdata->wdev.cac_started) {
1641 ieee80211_vif_release_channel(sdata);
1642 cfg80211_cac_event(sdata->dev, &chandef,
1643 NL80211_RADAR_CAC_FINISHED,
1646 mutex_unlock(&sdata->local->mtx);
1650 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1652 struct ieee80211_local *local = sdata->local;
1653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1657 if (local->hw.queues < IEEE80211_NUM_ACS)
1660 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1661 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1663 unsigned long now = jiffies;
1665 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1666 tx_tspec->admitted_time &&
1667 time_after(now, tx_tspec->time_slice_start + HZ)) {
1668 tx_tspec->consumed_tx_time = 0;
1669 tx_tspec->time_slice_start = now;
1671 if (tx_tspec->downgraded)
1673 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1676 switch (tx_tspec->action) {
1677 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1678 /* take the original parameters */
1679 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1681 "failed to set TX queue parameters for queue %d\n",
1683 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1684 tx_tspec->downgraded = false;
1687 case TX_TSPEC_ACTION_DOWNGRADE:
1688 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1689 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1693 /* downgrade next lower non-ACM AC */
1694 for (non_acm_ac = ac + 1;
1695 non_acm_ac < IEEE80211_NUM_ACS;
1697 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1699 /* The loop will result in using BK even if it requires
1700 * admission control, such configuration makes no sense
1701 * and we have to transmit somehow - the AC selection
1702 * does the same thing.
1704 if (drv_conf_tx(local, sdata, ac,
1705 &sdata->tx_conf[non_acm_ac]))
1707 "failed to set TX queue parameters for queue %d\n",
1709 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1711 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1712 tx_tspec->time_slice_start + HZ - now + 1);
1714 case TX_TSPEC_ACTION_NONE:
1723 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1725 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1726 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1729 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1731 struct ieee80211_sub_if_data *sdata;
1733 sdata = container_of(work, struct ieee80211_sub_if_data,
1734 u.mgd.tx_tspec_wk.work);
1735 ieee80211_sta_handle_tspec_ac_params(sdata);
1739 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1740 struct ieee80211_sub_if_data *sdata,
1741 const u8 *wmm_param, size_t wmm_param_len)
1743 struct ieee80211_tx_queue_params params;
1744 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1748 u8 uapsd_queues = 0;
1750 if (!local->ops->conf_tx)
1753 if (local->hw.queues < IEEE80211_NUM_ACS)
1759 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1762 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1763 uapsd_queues = ifmgd->uapsd_queues;
1765 count = wmm_param[6] & 0x0f;
1766 if (count == ifmgd->wmm_last_param_set)
1768 ifmgd->wmm_last_param_set = count;
1770 pos = wmm_param + 8;
1771 left = wmm_param_len - 8;
1773 memset(¶ms, 0, sizeof(params));
1776 for (; left >= 4; left -= 4, pos += 4) {
1777 int aci = (pos[0] >> 5) & 0x03;
1778 int acm = (pos[0] >> 4) & 0x01;
1786 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1787 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1793 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1794 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1800 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1801 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1808 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1809 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1814 params.aifs = pos[0] & 0x0f;
1815 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1816 params.cw_min = ecw2cw(pos[1] & 0x0f);
1817 params.txop = get_unaligned_le16(pos + 2);
1819 params.uapsd = uapsd;
1822 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1824 params.aifs, params.cw_min, params.cw_max,
1825 params.txop, params.uapsd,
1826 ifmgd->tx_tspec[queue].downgraded);
1827 sdata->tx_conf[queue] = params;
1828 if (!ifmgd->tx_tspec[queue].downgraded &&
1829 drv_conf_tx(local, sdata, queue, ¶ms))
1831 "failed to set TX queue parameters for queue %d\n",
1835 /* enable WMM or activate new settings */
1836 sdata->vif.bss_conf.qos = true;
1840 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1842 lockdep_assert_held(&sdata->local->mtx);
1844 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1845 ieee80211_run_deferred_scan(sdata->local);
1848 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1850 mutex_lock(&sdata->local->mtx);
1851 __ieee80211_stop_poll(sdata);
1852 mutex_unlock(&sdata->local->mtx);
1855 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1856 u16 capab, bool erp_valid, u8 erp)
1858 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1860 bool use_protection;
1861 bool use_short_preamble;
1862 bool use_short_slot;
1865 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1866 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1868 use_protection = false;
1869 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1872 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1873 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1874 use_short_slot = true;
1876 if (use_protection != bss_conf->use_cts_prot) {
1877 bss_conf->use_cts_prot = use_protection;
1878 changed |= BSS_CHANGED_ERP_CTS_PROT;
1881 if (use_short_preamble != bss_conf->use_short_preamble) {
1882 bss_conf->use_short_preamble = use_short_preamble;
1883 changed |= BSS_CHANGED_ERP_PREAMBLE;
1886 if (use_short_slot != bss_conf->use_short_slot) {
1887 bss_conf->use_short_slot = use_short_slot;
1888 changed |= BSS_CHANGED_ERP_SLOT;
1894 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1895 struct cfg80211_bss *cbss,
1896 u32 bss_info_changed)
1898 struct ieee80211_bss *bss = (void *)cbss->priv;
1899 struct ieee80211_local *local = sdata->local;
1900 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1902 bss_info_changed |= BSS_CHANGED_ASSOC;
1903 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1904 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1906 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1907 beacon_loss_count * bss_conf->beacon_int));
1909 sdata->u.mgd.associated = cbss;
1910 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1912 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1914 if (sdata->vif.p2p) {
1915 const struct cfg80211_bss_ies *ies;
1918 ies = rcu_dereference(cbss->ies);
1922 ret = cfg80211_get_p2p_attr(
1923 ies->data, ies->len,
1924 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1925 (u8 *) &bss_conf->p2p_noa_attr,
1926 sizeof(bss_conf->p2p_noa_attr));
1928 sdata->u.mgd.p2p_noa_index =
1929 bss_conf->p2p_noa_attr.index;
1930 bss_info_changed |= BSS_CHANGED_P2P_PS;
1936 /* just to be sure */
1937 ieee80211_stop_poll(sdata);
1939 ieee80211_led_assoc(local, 1);
1941 if (sdata->u.mgd.have_beacon) {
1943 * If the AP is buggy we may get here with no DTIM period
1944 * known, so assume it's 1 which is the only safe assumption
1945 * in that case, although if the TIM IE is broken powersave
1946 * probably just won't work at all.
1948 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1949 bss_conf->beacon_rate = bss->beacon_rate;
1950 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1952 bss_conf->beacon_rate = NULL;
1953 bss_conf->dtim_period = 0;
1956 bss_conf->assoc = 1;
1958 /* Tell the driver to monitor connection quality (if supported) */
1959 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1960 bss_conf->cqm_rssi_thold)
1961 bss_info_changed |= BSS_CHANGED_CQM;
1963 /* Enable ARP filtering */
1964 if (bss_conf->arp_addr_cnt)
1965 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1967 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1969 mutex_lock(&local->iflist_mtx);
1970 ieee80211_recalc_ps(local, -1);
1971 mutex_unlock(&local->iflist_mtx);
1973 ieee80211_recalc_smps(sdata);
1974 ieee80211_recalc_ps_vif(sdata);
1976 netif_carrier_on(sdata->dev);
1979 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1980 u16 stype, u16 reason, bool tx,
1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1984 struct ieee80211_local *local = sdata->local;
1987 sdata_assert_lock(sdata);
1989 if (WARN_ON_ONCE(tx && !frame_buf))
1992 if (WARN_ON(!ifmgd->associated))
1995 ieee80211_stop_poll(sdata);
1997 ifmgd->associated = NULL;
1998 netif_carrier_off(sdata->dev);
2001 * if we want to get out of ps before disassoc (why?) we have
2002 * to do it before sending disassoc, as otherwise the null-packet
2005 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2006 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2007 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2009 local->ps_sdata = NULL;
2011 /* disable per-vif ps */
2012 ieee80211_recalc_ps_vif(sdata);
2014 /* make sure ongoing transmission finishes */
2018 * drop any frame before deauth/disassoc, this can be data or
2019 * management frame. Since we are disconnecting, we should not
2020 * insist sending these frames which can take time and delay
2021 * the disconnection and possible the roaming.
2024 ieee80211_flush_queues(local, sdata, true);
2026 /* deauthenticate/disassociate now */
2027 if (tx || frame_buf)
2028 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2029 reason, tx, frame_buf);
2031 /* flush out frame - make sure the deauth was actually sent */
2033 ieee80211_flush_queues(local, sdata, false);
2035 /* clear bssid only after building the needed mgmt frames */
2036 memset(ifmgd->bssid, 0, ETH_ALEN);
2038 /* remove AP and TDLS peers */
2039 sta_info_flush(sdata);
2041 /* finally reset all BSS / config parameters */
2042 changed |= ieee80211_reset_erp_info(sdata);
2044 ieee80211_led_assoc(local, 0);
2045 changed |= BSS_CHANGED_ASSOC;
2046 sdata->vif.bss_conf.assoc = false;
2048 ifmgd->p2p_noa_index = -1;
2049 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2050 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2052 /* on the next assoc, re-program HT/VHT parameters */
2053 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2054 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2055 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2056 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2058 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2060 del_timer_sync(&local->dynamic_ps_timer);
2061 cancel_work_sync(&local->dynamic_ps_enable_work);
2063 /* Disable ARP filtering */
2064 if (sdata->vif.bss_conf.arp_addr_cnt)
2065 changed |= BSS_CHANGED_ARP_FILTER;
2067 sdata->vif.bss_conf.qos = false;
2068 changed |= BSS_CHANGED_QOS;
2070 /* The BSSID (not really interesting) and HT changed */
2071 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2072 ieee80211_bss_info_change_notify(sdata, changed);
2074 /* disassociated - set to defaults now */
2075 ieee80211_set_wmm_default(sdata, false);
2077 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2078 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2079 del_timer_sync(&sdata->u.mgd.timer);
2080 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2082 sdata->vif.bss_conf.dtim_period = 0;
2083 sdata->vif.bss_conf.beacon_rate = NULL;
2085 ifmgd->have_beacon = false;
2088 mutex_lock(&local->mtx);
2089 ieee80211_vif_release_channel(sdata);
2091 sdata->vif.csa_active = false;
2092 ifmgd->csa_waiting_bcn = false;
2093 if (sdata->csa_block_tx) {
2094 ieee80211_wake_vif_queues(local, sdata,
2095 IEEE80211_QUEUE_STOP_REASON_CSA);
2096 sdata->csa_block_tx = false;
2098 mutex_unlock(&local->mtx);
2100 /* existing TX TSPEC sessions no longer exist */
2101 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2102 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2104 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2107 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2108 struct ieee80211_hdr *hdr)
2111 * We can postpone the mgd.timer whenever receiving unicast frames
2112 * from AP because we know that the connection is working both ways
2113 * at that time. But multicast frames (and hence also beacons) must
2114 * be ignored here, because we need to trigger the timer during
2115 * data idle periods for sending the periodic probe request to the
2116 * AP we're connected to.
2118 if (is_multicast_ether_addr(hdr->addr1))
2121 ieee80211_sta_reset_conn_monitor(sdata);
2124 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2127 struct ieee80211_local *local = sdata->local;
2129 mutex_lock(&local->mtx);
2130 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2133 __ieee80211_stop_poll(sdata);
2135 mutex_lock(&local->iflist_mtx);
2136 ieee80211_recalc_ps(local, -1);
2137 mutex_unlock(&local->iflist_mtx);
2139 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2143 * We've received a probe response, but are not sure whether
2144 * we have or will be receiving any beacons or data, so let's
2145 * schedule the timers again, just in case.
2147 ieee80211_sta_reset_beacon_monitor(sdata);
2149 mod_timer(&ifmgd->conn_mon_timer,
2150 round_jiffies_up(jiffies +
2151 IEEE80211_CONNECTION_IDLE_TIME));
2153 mutex_unlock(&local->mtx);
2156 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2157 struct ieee80211_hdr *hdr,
2160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2161 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2162 int ac = ieee80211_ac_from_tid(tid);
2163 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2164 unsigned long now = jiffies;
2166 if (likely(!tx_tspec->admitted_time))
2169 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2170 tx_tspec->consumed_tx_time = 0;
2171 tx_tspec->time_slice_start = now;
2173 if (tx_tspec->downgraded) {
2174 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2175 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2179 if (tx_tspec->downgraded)
2182 tx_tspec->consumed_tx_time += tx_time;
2184 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2185 tx_tspec->downgraded = true;
2186 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2187 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2191 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2192 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2194 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2196 if (!ieee80211_is_data(hdr->frame_control))
2199 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2200 sdata->u.mgd.probe_send_count > 0) {
2202 ieee80211_sta_reset_conn_monitor(sdata);
2204 sdata->u.mgd.nullfunc_failed = true;
2205 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2210 ieee80211_sta_reset_conn_monitor(sdata);
2213 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2217 u8 *dst = ifmgd->associated->bssid;
2218 u8 unicast_limit = max(1, max_probe_tries - 3);
2221 * Try sending broadcast probe requests for the last three
2222 * probe requests after the first ones failed since some
2223 * buggy APs only support broadcast probe requests.
2225 if (ifmgd->probe_send_count >= unicast_limit)
2229 * When the hardware reports an accurate Tx ACK status, it's
2230 * better to send a nullfunc frame instead of a probe request,
2231 * as it will kick us off the AP quickly if we aren't associated
2232 * anymore. The timeout will be reset if the frame is ACKed by
2235 ifmgd->probe_send_count++;
2237 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2238 ifmgd->nullfunc_failed = false;
2239 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2244 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2245 if (WARN_ON_ONCE(ssid == NULL))
2250 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
2251 ssid + 2, ssid_len, NULL,
2252 0, (u32) -1, true, 0,
2253 ifmgd->associated->channel, false);
2257 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2258 run_again(sdata, ifmgd->probe_timeout);
2261 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2264 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2265 bool already = false;
2267 if (!ieee80211_sdata_running(sdata))
2272 if (!ifmgd->associated)
2275 mutex_lock(&sdata->local->mtx);
2277 if (sdata->local->tmp_channel || sdata->local->scanning) {
2278 mutex_unlock(&sdata->local->mtx);
2283 mlme_dbg_ratelimited(sdata,
2284 "detected beacon loss from AP (missed %d beacons) - probing\n",
2287 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2291 * The driver/our work has already reported this event or the
2292 * connection monitoring has kicked in and we have already sent
2293 * a probe request. Or maybe the AP died and the driver keeps
2294 * reporting until we disassociate...
2296 * In either case we have to ignore the current call to this
2297 * function (except for setting the correct probe reason bit)
2298 * because otherwise we would reset the timer every time and
2299 * never check whether we received a probe response!
2301 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2304 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2306 mutex_unlock(&sdata->local->mtx);
2311 mutex_lock(&sdata->local->iflist_mtx);
2312 ieee80211_recalc_ps(sdata->local, -1);
2313 mutex_unlock(&sdata->local->iflist_mtx);
2315 ifmgd->probe_send_count = 0;
2316 ieee80211_mgd_probe_ap_send(sdata);
2318 sdata_unlock(sdata);
2321 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2322 struct ieee80211_vif *vif)
2324 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2326 struct cfg80211_bss *cbss;
2327 struct sk_buff *skb;
2331 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2334 sdata_assert_lock(sdata);
2336 if (ifmgd->associated)
2337 cbss = ifmgd->associated;
2338 else if (ifmgd->auth_data)
2339 cbss = ifmgd->auth_data->bss;
2340 else if (ifmgd->assoc_data)
2341 cbss = ifmgd->assoc_data->bss;
2346 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2347 if (WARN_ON_ONCE(ssid == NULL))
2352 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2353 (u32) -1, cbss->channel,
2360 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2362 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2364 struct ieee80211_local *local = sdata->local;
2365 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2366 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2369 if (!ifmgd->associated) {
2370 sdata_unlock(sdata);
2374 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2375 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2377 mutex_lock(&local->mtx);
2378 sdata->vif.csa_active = false;
2379 ifmgd->csa_waiting_bcn = false;
2380 if (sdata->csa_block_tx) {
2381 ieee80211_wake_vif_queues(local, sdata,
2382 IEEE80211_QUEUE_STOP_REASON_CSA);
2383 sdata->csa_block_tx = false;
2385 mutex_unlock(&local->mtx);
2387 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2388 IEEE80211_DEAUTH_FRAME_LEN);
2389 sdata_unlock(sdata);
2392 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2394 struct ieee80211_sub_if_data *sdata =
2395 container_of(work, struct ieee80211_sub_if_data,
2396 u.mgd.beacon_connection_loss_work);
2397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2398 struct sta_info *sta;
2400 if (ifmgd->associated) {
2402 sta = sta_info_get(sdata, ifmgd->bssid);
2404 sta->beacon_loss_count++;
2408 if (ifmgd->connection_loss) {
2409 sdata_info(sdata, "Connection to AP %pM lost\n",
2411 __ieee80211_disconnect(sdata);
2413 ieee80211_mgd_probe_ap(sdata, true);
2417 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2419 struct ieee80211_sub_if_data *sdata =
2420 container_of(work, struct ieee80211_sub_if_data,
2421 u.mgd.csa_connection_drop_work);
2423 __ieee80211_disconnect(sdata);
2426 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2428 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2429 struct ieee80211_hw *hw = &sdata->local->hw;
2431 trace_api_beacon_loss(sdata);
2433 sdata->u.mgd.connection_loss = false;
2434 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2436 EXPORT_SYMBOL(ieee80211_beacon_loss);
2438 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2440 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2441 struct ieee80211_hw *hw = &sdata->local->hw;
2443 trace_api_connection_loss(sdata);
2445 sdata->u.mgd.connection_loss = true;
2446 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2448 EXPORT_SYMBOL(ieee80211_connection_loss);
2451 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2454 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2456 sdata_assert_lock(sdata);
2460 * we are not authenticated yet, the only timer that could be
2461 * running is the timeout for the authentication response which
2462 * which is not relevant anymore.
2464 del_timer_sync(&sdata->u.mgd.timer);
2465 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2467 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2468 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2469 sdata->u.mgd.flags = 0;
2470 mutex_lock(&sdata->local->mtx);
2471 ieee80211_vif_release_channel(sdata);
2472 mutex_unlock(&sdata->local->mtx);
2475 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2477 sdata->u.mgd.auth_data = NULL;
2480 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2481 struct ieee80211_mgmt *mgmt, size_t len)
2483 struct ieee80211_local *local = sdata->local;
2484 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2486 struct ieee802_11_elems elems;
2489 pos = mgmt->u.auth.variable;
2490 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2491 if (!elems.challenge)
2493 auth_data->expected_transaction = 4;
2494 drv_mgd_prepare_tx(sdata->local, sdata);
2495 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2496 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2497 IEEE80211_TX_INTFL_MLME_CONN_TX;
2498 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2499 elems.challenge - 2, elems.challenge_len + 2,
2500 auth_data->bss->bssid, auth_data->bss->bssid,
2501 auth_data->key, auth_data->key_len,
2502 auth_data->key_idx, tx_flags);
2505 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2506 struct ieee80211_mgmt *mgmt, size_t len)
2508 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2510 u16 auth_alg, auth_transaction, status_code;
2511 struct sta_info *sta;
2513 sdata_assert_lock(sdata);
2518 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2521 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2523 if (!ether_addr_equal(bssid, mgmt->bssid))
2526 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2527 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2528 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2530 if (auth_alg != ifmgd->auth_data->algorithm ||
2531 auth_transaction != ifmgd->auth_data->expected_transaction) {
2532 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2533 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2535 ifmgd->auth_data->expected_transaction);
2539 if (status_code != WLAN_STATUS_SUCCESS) {
2540 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2541 mgmt->sa, status_code);
2542 ieee80211_destroy_auth_data(sdata, false);
2543 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2547 switch (ifmgd->auth_data->algorithm) {
2548 case WLAN_AUTH_OPEN:
2549 case WLAN_AUTH_LEAP:
2553 case WLAN_AUTH_SHARED_KEY:
2554 if (ifmgd->auth_data->expected_transaction != 4) {
2555 ieee80211_auth_challenge(sdata, mgmt, len);
2556 /* need another frame */
2561 WARN_ONCE(1, "invalid auth alg %d",
2562 ifmgd->auth_data->algorithm);
2566 sdata_info(sdata, "authenticated\n");
2567 ifmgd->auth_data->done = true;
2568 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2569 ifmgd->auth_data->timeout_started = true;
2570 run_again(sdata, ifmgd->auth_data->timeout);
2572 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2573 ifmgd->auth_data->expected_transaction != 2) {
2575 * Report auth frame to user space for processing since another
2576 * round of Authentication frames is still needed.
2578 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2582 /* move station state to auth */
2583 mutex_lock(&sdata->local->sta_mtx);
2584 sta = sta_info_get(sdata, bssid);
2586 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2589 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2590 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2593 mutex_unlock(&sdata->local->sta_mtx);
2595 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2598 mutex_unlock(&sdata->local->sta_mtx);
2599 /* ignore frame -- wait for timeout */
2602 #define case_WLAN(type) \
2603 case WLAN_REASON_##type: return #type
2605 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2607 switch (reason_code) {
2608 case_WLAN(UNSPECIFIED);
2609 case_WLAN(PREV_AUTH_NOT_VALID);
2610 case_WLAN(DEAUTH_LEAVING);
2611 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2612 case_WLAN(DISASSOC_AP_BUSY);
2613 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2614 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2615 case_WLAN(DISASSOC_STA_HAS_LEFT);
2616 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2617 case_WLAN(DISASSOC_BAD_POWER);
2618 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2619 case_WLAN(INVALID_IE);
2620 case_WLAN(MIC_FAILURE);
2621 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2622 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2623 case_WLAN(IE_DIFFERENT);
2624 case_WLAN(INVALID_GROUP_CIPHER);
2625 case_WLAN(INVALID_PAIRWISE_CIPHER);
2626 case_WLAN(INVALID_AKMP);
2627 case_WLAN(UNSUPP_RSN_VERSION);
2628 case_WLAN(INVALID_RSN_IE_CAP);
2629 case_WLAN(IEEE8021X_FAILED);
2630 case_WLAN(CIPHER_SUITE_REJECTED);
2631 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2632 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2633 case_WLAN(DISASSOC_LOW_ACK);
2634 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2635 case_WLAN(QSTA_LEAVE_QBSS);
2636 case_WLAN(QSTA_NOT_USE);
2637 case_WLAN(QSTA_REQUIRE_SETUP);
2638 case_WLAN(QSTA_TIMEOUT);
2639 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2640 case_WLAN(MESH_PEER_CANCELED);
2641 case_WLAN(MESH_MAX_PEERS);
2642 case_WLAN(MESH_CONFIG);
2643 case_WLAN(MESH_CLOSE);
2644 case_WLAN(MESH_MAX_RETRIES);
2645 case_WLAN(MESH_CONFIRM_TIMEOUT);
2646 case_WLAN(MESH_INVALID_GTK);
2647 case_WLAN(MESH_INCONSISTENT_PARAM);
2648 case_WLAN(MESH_INVALID_SECURITY);
2649 case_WLAN(MESH_PATH_ERROR);
2650 case_WLAN(MESH_PATH_NOFORWARD);
2651 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2652 case_WLAN(MAC_EXISTS_IN_MBSS);
2653 case_WLAN(MESH_CHAN_REGULATORY);
2654 case_WLAN(MESH_CHAN);
2655 default: return "<unknown>";
2659 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2660 struct ieee80211_mgmt *mgmt, size_t len)
2662 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2663 const u8 *bssid = NULL;
2666 sdata_assert_lock(sdata);
2671 if (!ifmgd->associated ||
2672 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2675 bssid = ifmgd->associated->bssid;
2677 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2679 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2680 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2682 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2684 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2688 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2689 struct ieee80211_mgmt *mgmt, size_t len)
2691 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2694 sdata_assert_lock(sdata);
2699 if (!ifmgd->associated ||
2700 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2703 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2705 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2706 mgmt->sa, reason_code);
2708 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2710 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2713 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2714 u8 *supp_rates, unsigned int supp_rates_len,
2715 u32 *rates, u32 *basic_rates,
2716 bool *have_higher_than_11mbit,
2717 int *min_rate, int *min_rate_index,
2718 int shift, u32 rate_flags)
2722 for (i = 0; i < supp_rates_len; i++) {
2723 int rate = supp_rates[i] & 0x7f;
2724 bool is_basic = !!(supp_rates[i] & 0x80);
2726 if ((rate * 5 * (1 << shift)) > 110)
2727 *have_higher_than_11mbit = true;
2730 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2731 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2733 * Note: Even through the membership selector and the basic
2734 * rate flag share the same bit, they are not exactly
2737 if (!!(supp_rates[i] & 0x80) &&
2738 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2741 for (j = 0; j < sband->n_bitrates; j++) {
2742 struct ieee80211_rate *br;
2745 br = &sband->bitrates[j];
2746 if ((rate_flags & br->flags) != rate_flags)
2749 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2750 if (brate == rate) {
2753 *basic_rates |= BIT(j);
2754 if ((rate * 5) < *min_rate) {
2755 *min_rate = rate * 5;
2756 *min_rate_index = j;
2764 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2767 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2769 sdata_assert_lock(sdata);
2773 * we are not associated yet, the only timer that could be
2774 * running is the timeout for the association response which
2775 * which is not relevant anymore.
2777 del_timer_sync(&sdata->u.mgd.timer);
2778 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2780 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2781 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2782 sdata->u.mgd.flags = 0;
2783 mutex_lock(&sdata->local->mtx);
2784 ieee80211_vif_release_channel(sdata);
2785 mutex_unlock(&sdata->local->mtx);
2789 sdata->u.mgd.assoc_data = NULL;
2792 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2793 struct cfg80211_bss *cbss,
2794 struct ieee80211_mgmt *mgmt, size_t len)
2796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2797 struct ieee80211_local *local = sdata->local;
2798 struct ieee80211_supported_band *sband;
2799 struct sta_info *sta;
2801 u16 capab_info, aid;
2802 struct ieee802_11_elems elems;
2803 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2804 const struct cfg80211_bss_ies *bss_ies = NULL;
2805 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2810 /* AssocResp and ReassocResp have identical structure */
2812 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2813 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2815 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2816 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2818 aid &= ~(BIT(15) | BIT(14));
2820 ifmgd->broken_ap = false;
2822 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2823 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2826 ifmgd->broken_ap = true;
2829 pos = mgmt->u.assoc_resp.variable;
2830 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2832 if (!elems.supp_rates) {
2833 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2838 ifmgd->tdls_chan_switch_prohibited =
2839 elems.ext_capab && elems.ext_capab_len >= 5 &&
2840 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2843 * Some APs are erroneously not including some information in their
2844 * (re)association response frames. Try to recover by using the data
2845 * from the beacon or probe response. This seems to afflict mobile
2846 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2847 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2849 if ((assoc_data->wmm && !elems.wmm_param) ||
2850 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2851 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2852 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2853 (!elems.vht_cap_elem || !elems.vht_operation))) {
2854 const struct cfg80211_bss_ies *ies;
2855 struct ieee802_11_elems bss_elems;
2858 ies = rcu_dereference(cbss->ies);
2860 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2866 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2868 if (assoc_data->wmm &&
2869 !elems.wmm_param && bss_elems.wmm_param) {
2870 elems.wmm_param = bss_elems.wmm_param;
2872 "AP bug: WMM param missing from AssocResp\n");
2876 * Also check if we requested HT/VHT, otherwise the AP doesn't
2877 * have to include the IEs in the (re)association response.
2879 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2880 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2881 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2883 "AP bug: HT capability missing from AssocResp\n");
2885 if (!elems.ht_operation && bss_elems.ht_operation &&
2886 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2887 elems.ht_operation = bss_elems.ht_operation;
2889 "AP bug: HT operation missing from AssocResp\n");
2891 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2892 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2893 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2895 "AP bug: VHT capa missing from AssocResp\n");
2897 if (!elems.vht_operation && bss_elems.vht_operation &&
2898 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2899 elems.vht_operation = bss_elems.vht_operation;
2901 "AP bug: VHT operation missing from AssocResp\n");
2906 * We previously checked these in the beacon/probe response, so
2907 * they should be present here. This is just a safety net.
2909 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2910 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2912 "HT AP is missing WMM params or HT capability/operation\n");
2917 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2918 (!elems.vht_cap_elem || !elems.vht_operation)) {
2920 "VHT AP is missing VHT capability/operation\n");
2925 mutex_lock(&sdata->local->sta_mtx);
2927 * station info was already allocated and inserted before
2928 * the association and should be available to us
2930 sta = sta_info_get(sdata, cbss->bssid);
2931 if (WARN_ON(!sta)) {
2932 mutex_unlock(&sdata->local->sta_mtx);
2937 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2939 /* Set up internal HT/VHT capabilities */
2940 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2941 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2942 elems.ht_cap_elem, sta);
2944 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2945 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2946 elems.vht_cap_elem, sta);
2949 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2950 * in their association response, so ignore that data for our own
2951 * configuration. If it changed since the last beacon, we'll get the
2952 * next beacon and update then.
2956 * If an operating mode notification IE is present, override the
2957 * NSS calculation (that would be done in rate_control_rate_init())
2958 * and use the # of streams from that element.
2960 if (elems.opmode_notif &&
2961 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2964 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2965 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2967 sta->sta.rx_nss = nss;
2970 rate_control_rate_init(sta);
2972 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2973 set_sta_flag(sta, WLAN_STA_MFP);
2975 sta->sta.wme = elems.wmm_param;
2977 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2978 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2979 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2982 "failed to move station %pM to desired state\n",
2984 WARN_ON(__sta_info_destroy(sta));
2985 mutex_unlock(&sdata->local->sta_mtx);
2990 mutex_unlock(&sdata->local->sta_mtx);
2993 * Always handle WMM once after association regardless
2994 * of the first value the AP uses. Setting -1 here has
2995 * that effect because the AP values is an unsigned
2998 ifmgd->wmm_last_param_set = -1;
3000 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
3001 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3002 elems.wmm_param_len);
3004 ieee80211_set_wmm_default(sdata, false);
3005 changed |= BSS_CHANGED_QOS;
3007 /* set AID and assoc capability,
3008 * ieee80211_set_associated() will tell the driver */
3009 bss_conf->aid = aid;
3010 bss_conf->assoc_capability = capab_info;
3011 ieee80211_set_associated(sdata, cbss, changed);
3014 * If we're using 4-addr mode, let the AP know that we're
3015 * doing so, so that it can create the STA VLAN on its side
3017 if (ifmgd->use_4addr)
3018 ieee80211_send_4addr_nullfunc(local, sdata);
3021 * Start timer to probe the connection to the AP now.
3022 * Also start the timer that will detect beacon loss.
3024 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3025 ieee80211_sta_reset_beacon_monitor(sdata);
3033 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3034 struct ieee80211_mgmt *mgmt,
3037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3038 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3039 u16 capab_info, status_code, aid;
3040 struct ieee802_11_elems elems;
3041 int ac, uapsd_queues = -1;
3044 struct cfg80211_bss *bss;
3046 sdata_assert_lock(sdata);
3050 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3054 * AssocResp and ReassocResp have identical structure, so process both
3055 * of them in this function.
3061 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3062 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3063 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3064 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3067 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3068 reassoc ? "Rea" : "A", mgmt->sa,
3069 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3071 pos = mgmt->u.assoc_resp.variable;
3072 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3074 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3075 elems.timeout_int &&
3076 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3078 tu = le32_to_cpu(elems.timeout_int->value);
3079 ms = tu * 1024 / 1000;
3081 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3083 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3084 assoc_data->timeout_started = true;
3085 if (ms > IEEE80211_ASSOC_TIMEOUT)
3086 run_again(sdata, assoc_data->timeout);
3090 bss = assoc_data->bss;
3092 if (status_code != WLAN_STATUS_SUCCESS) {
3093 sdata_info(sdata, "%pM denied association (code=%d)\n",
3094 mgmt->sa, status_code);
3095 ieee80211_destroy_assoc_data(sdata, false);
3097 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3098 /* oops -- internal error -- send timeout for now */
3099 ieee80211_destroy_assoc_data(sdata, false);
3100 cfg80211_assoc_timeout(sdata->dev, bss);
3103 sdata_info(sdata, "associated\n");
3106 * destroy assoc_data afterwards, as otherwise an idle
3107 * recalc after assoc_data is NULL but before associated
3108 * is set can cause the interface to go idle
3110 ieee80211_destroy_assoc_data(sdata, true);
3112 /* get uapsd queues configuration */
3114 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3115 if (sdata->tx_conf[ac].uapsd)
3116 uapsd_queues |= BIT(ac);
3119 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3122 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3123 struct ieee80211_mgmt *mgmt, size_t len,
3124 struct ieee80211_rx_status *rx_status,
3125 struct ieee802_11_elems *elems)
3127 struct ieee80211_local *local = sdata->local;
3128 struct ieee80211_bss *bss;
3129 struct ieee80211_channel *channel;
3131 sdata_assert_lock(sdata);
3133 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3137 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3140 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3141 ieee80211_rx_bss_put(local, bss);
3146 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3147 struct sk_buff *skb)
3149 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3150 struct ieee80211_if_managed *ifmgd;
3151 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3152 size_t baselen, len = skb->len;
3153 struct ieee802_11_elems elems;
3155 ifmgd = &sdata->u.mgd;
3157 sdata_assert_lock(sdata);
3159 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3160 return; /* ignore ProbeResp to foreign address */
3162 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3166 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3169 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3171 if (ifmgd->associated &&
3172 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3173 ieee80211_reset_ap_probe(sdata);
3175 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3176 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3177 /* got probe response, continue with auth */
3178 sdata_info(sdata, "direct probe responded\n");
3179 ifmgd->auth_data->tries = 0;
3180 ifmgd->auth_data->timeout = jiffies;
3181 ifmgd->auth_data->timeout_started = true;
3182 run_again(sdata, ifmgd->auth_data->timeout);
3187 * This is the canonical list of information elements we care about,
3188 * the filter code also gives us all changes to the Microsoft OUI
3189 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3190 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3191 * changes to requested client power.
3193 * We implement beacon filtering in software since that means we can
3194 * avoid processing the frame here and in cfg80211, and userspace
3195 * will not be able to tell whether the hardware supports it or not.
3197 * XXX: This list needs to be dynamic -- userspace needs to be able to
3198 * add items it requires. It also needs to be able to tell us to
3199 * look out for other vendor IEs.
3201 static const u64 care_about_ies =
3202 (1ULL << WLAN_EID_COUNTRY) |
3203 (1ULL << WLAN_EID_ERP_INFO) |
3204 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3205 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3206 (1ULL << WLAN_EID_HT_CAPABILITY) |
3207 (1ULL << WLAN_EID_HT_OPERATION) |
3208 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3210 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3211 struct ieee80211_mgmt *mgmt, size_t len,
3212 struct ieee80211_rx_status *rx_status)
3214 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3215 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3217 struct ieee802_11_elems elems;
3218 struct ieee80211_local *local = sdata->local;
3219 struct ieee80211_chanctx_conf *chanctx_conf;
3220 struct ieee80211_channel *chan;
3221 struct sta_info *sta;
3227 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3229 sdata_assert_lock(sdata);
3231 /* Process beacon from the current BSS */
3232 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3237 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3238 if (!chanctx_conf) {
3243 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3247 chan = chanctx_conf->def.chan;
3250 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3251 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3252 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3253 len - baselen, false, &elems);
3255 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3256 if (elems.tim && !elems.parse_error) {
3257 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3258 ifmgd->dtim_period = tim_ie->dtim_period;
3260 ifmgd->have_beacon = true;
3261 ifmgd->assoc_data->need_beacon = false;
3262 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3263 sdata->vif.bss_conf.sync_tsf =
3264 le64_to_cpu(mgmt->u.beacon.timestamp);
3265 sdata->vif.bss_conf.sync_device_ts =
3266 rx_status->device_timestamp;
3268 sdata->vif.bss_conf.sync_dtim_count =
3269 elems.tim->dtim_count;
3271 sdata->vif.bss_conf.sync_dtim_count = 0;
3273 /* continue assoc process */
3274 ifmgd->assoc_data->timeout = jiffies;
3275 ifmgd->assoc_data->timeout_started = true;
3276 run_again(sdata, ifmgd->assoc_data->timeout);
3280 if (!ifmgd->associated ||
3281 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3283 bssid = ifmgd->associated->bssid;
3285 /* Track average RSSI from the Beacon frames of the current AP */
3286 ifmgd->last_beacon_signal = rx_status->signal;
3287 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3288 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3289 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3290 ifmgd->last_cqm_event_signal = 0;
3291 ifmgd->count_beacon_signal = 1;
3292 ifmgd->last_ave_beacon_signal = 0;
3294 ifmgd->ave_beacon_signal =
3295 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3296 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3297 ifmgd->ave_beacon_signal) / 16;
3298 ifmgd->count_beacon_signal++;
3301 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3302 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3303 int sig = ifmgd->ave_beacon_signal;
3304 int last_sig = ifmgd->last_ave_beacon_signal;
3307 * if signal crosses either of the boundaries, invoke callback
3308 * with appropriate parameters
3310 if (sig > ifmgd->rssi_max_thold &&
3311 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3312 ifmgd->last_ave_beacon_signal = sig;
3313 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3314 } else if (sig < ifmgd->rssi_min_thold &&
3315 (last_sig >= ifmgd->rssi_max_thold ||
3317 ifmgd->last_ave_beacon_signal = sig;
3318 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3322 if (bss_conf->cqm_rssi_thold &&
3323 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3324 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3325 int sig = ifmgd->ave_beacon_signal / 16;
3326 int last_event = ifmgd->last_cqm_event_signal;
3327 int thold = bss_conf->cqm_rssi_thold;
3328 int hyst = bss_conf->cqm_rssi_hyst;
3330 (last_event == 0 || sig < last_event - hyst)) {
3331 ifmgd->last_cqm_event_signal = sig;
3332 ieee80211_cqm_rssi_notify(
3334 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3336 } else if (sig > thold &&
3337 (last_event == 0 || sig > last_event + hyst)) {
3338 ifmgd->last_cqm_event_signal = sig;
3339 ieee80211_cqm_rssi_notify(
3341 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3346 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3347 mlme_dbg_ratelimited(sdata,
3348 "cancelling AP probe due to a received beacon\n");
3349 ieee80211_reset_ap_probe(sdata);
3353 * Push the beacon loss detection into the future since
3354 * we are processing a beacon from the AP just now.
3356 ieee80211_sta_reset_beacon_monitor(sdata);
3358 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3359 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3360 len - baselen, false, &elems,
3361 care_about_ies, ncrc);
3363 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3364 bool directed_tim = ieee80211_check_tim(elems.tim,
3368 if (local->hw.conf.dynamic_ps_timeout > 0) {
3369 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3370 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3371 ieee80211_hw_config(local,
3372 IEEE80211_CONF_CHANGE_PS);
3374 ieee80211_send_nullfunc(local, sdata, 0);
3375 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3376 local->pspolling = true;
3379 * Here is assumed that the driver will be
3380 * able to send ps-poll frame and receive a
3381 * response even though power save mode is
3382 * enabled, but some drivers might require
3383 * to disable power save here. This needs
3384 * to be investigated.
3386 ieee80211_send_pspoll(local, sdata);
3391 if (sdata->vif.p2p) {
3392 struct ieee80211_p2p_noa_attr noa = {};
3395 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3397 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3398 (u8 *) &noa, sizeof(noa));
3400 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3401 /* valid noa_attr and index changed */
3402 sdata->u.mgd.p2p_noa_index = noa.index;
3403 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3404 changed |= BSS_CHANGED_P2P_PS;
3406 * make sure we update all information, the CRC
3407 * mechanism doesn't look at P2P attributes.
3409 ifmgd->beacon_crc_valid = false;
3411 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3412 /* noa_attr not found and we had valid noa_attr before */
3413 sdata->u.mgd.p2p_noa_index = -1;
3414 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3415 changed |= BSS_CHANGED_P2P_PS;
3416 ifmgd->beacon_crc_valid = false;
3420 if (ifmgd->csa_waiting_bcn)
3421 ieee80211_chswitch_post_beacon(sdata);
3423 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3425 ifmgd->beacon_crc = ncrc;
3426 ifmgd->beacon_crc_valid = true;
3428 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3430 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3431 rx_status->device_timestamp,
3434 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3435 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3436 elems.wmm_param_len))
3437 changed |= BSS_CHANGED_QOS;
3440 * If we haven't had a beacon before, tell the driver about the
3441 * DTIM period (and beacon timing if desired) now.
3443 if (!ifmgd->have_beacon) {
3444 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3446 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3448 bss_conf->dtim_period = 1;
3450 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3451 sdata->vif.bss_conf.sync_tsf =
3452 le64_to_cpu(mgmt->u.beacon.timestamp);
3453 sdata->vif.bss_conf.sync_device_ts =
3454 rx_status->device_timestamp;
3456 sdata->vif.bss_conf.sync_dtim_count =
3457 elems.tim->dtim_count;
3459 sdata->vif.bss_conf.sync_dtim_count = 0;
3462 changed |= BSS_CHANGED_BEACON_INFO;
3463 ifmgd->have_beacon = true;
3465 mutex_lock(&local->iflist_mtx);
3466 ieee80211_recalc_ps(local, -1);
3467 mutex_unlock(&local->iflist_mtx);
3469 ieee80211_recalc_ps_vif(sdata);
3472 if (elems.erp_info) {
3474 erp_value = elems.erp_info[0];
3478 changed |= ieee80211_handle_bss_capability(sdata,
3479 le16_to_cpu(mgmt->u.beacon.capab_info),
3480 erp_valid, erp_value);
3482 mutex_lock(&local->sta_mtx);
3483 sta = sta_info_get(sdata, bssid);
3485 if (ieee80211_config_bw(sdata, sta,
3486 elems.ht_cap_elem, elems.ht_operation,
3487 elems.vht_operation, bssid, &changed)) {
3488 mutex_unlock(&local->sta_mtx);
3489 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3490 WLAN_REASON_DEAUTH_LEAVING,
3492 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3493 sizeof(deauth_buf));
3497 if (sta && elems.opmode_notif)
3498 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3499 rx_status->band, true);
3500 mutex_unlock(&local->sta_mtx);
3502 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3504 elems.country_elem_len,
3505 elems.pwr_constr_elem,
3506 elems.cisco_dtpc_elem);
3508 ieee80211_bss_info_change_notify(sdata, changed);
3511 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3512 struct sk_buff *skb)
3514 struct ieee80211_rx_status *rx_status;
3515 struct ieee80211_mgmt *mgmt;
3517 struct ieee802_11_elems elems;
3520 rx_status = (struct ieee80211_rx_status *) skb->cb;
3521 mgmt = (struct ieee80211_mgmt *) skb->data;
3522 fc = le16_to_cpu(mgmt->frame_control);
3526 switch (fc & IEEE80211_FCTL_STYPE) {
3527 case IEEE80211_STYPE_BEACON:
3528 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3530 case IEEE80211_STYPE_PROBE_RESP:
3531 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3533 case IEEE80211_STYPE_AUTH:
3534 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3536 case IEEE80211_STYPE_DEAUTH:
3537 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3539 case IEEE80211_STYPE_DISASSOC:
3540 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3542 case IEEE80211_STYPE_ASSOC_RESP:
3543 case IEEE80211_STYPE_REASSOC_RESP:
3544 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3546 case IEEE80211_STYPE_ACTION:
3547 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3548 ies_len = skb->len -
3549 offsetof(struct ieee80211_mgmt,
3550 u.action.u.chan_switch.variable);
3555 ieee802_11_parse_elems(
3556 mgmt->u.action.u.chan_switch.variable,
3557 ies_len, true, &elems);
3559 if (elems.parse_error)
3562 ieee80211_sta_process_chanswitch(sdata,
3564 rx_status->device_timestamp,
3566 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3567 ies_len = skb->len -
3568 offsetof(struct ieee80211_mgmt,
3569 u.action.u.ext_chan_switch.variable);
3574 ieee802_11_parse_elems(
3575 mgmt->u.action.u.ext_chan_switch.variable,
3576 ies_len, true, &elems);
3578 if (elems.parse_error)
3581 /* for the handling code pretend this was also an IE */
3582 elems.ext_chansw_ie =
3583 &mgmt->u.action.u.ext_chan_switch.data;
3585 ieee80211_sta_process_chanswitch(sdata,
3587 rx_status->device_timestamp,
3592 sdata_unlock(sdata);
3595 static void ieee80211_sta_timer(unsigned long data)
3597 struct ieee80211_sub_if_data *sdata =
3598 (struct ieee80211_sub_if_data *) data;
3600 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3603 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3604 u8 *bssid, u8 reason, bool tx)
3606 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3608 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3611 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3612 IEEE80211_DEAUTH_FRAME_LEN);
3615 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3617 struct ieee80211_local *local = sdata->local;
3618 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3619 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3622 sdata_assert_lock(sdata);
3624 if (WARN_ON_ONCE(!auth_data))
3629 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3630 sdata_info(sdata, "authentication with %pM timed out\n",
3631 auth_data->bss->bssid);
3634 * Most likely AP is not in the range so remove the
3635 * bss struct for that AP.
3637 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3642 drv_mgd_prepare_tx(local, sdata);
3644 if (auth_data->bss->proberesp_ies) {
3648 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3649 auth_data->bss->bssid, auth_data->tries,
3650 IEEE80211_AUTH_MAX_TRIES);
3652 auth_data->expected_transaction = 2;
3654 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3655 trans = auth_data->sae_trans;
3656 status = auth_data->sae_status;
3657 auth_data->expected_transaction = trans;
3660 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3661 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3662 IEEE80211_TX_INTFL_MLME_CONN_TX;
3664 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3665 auth_data->data, auth_data->data_len,
3666 auth_data->bss->bssid,
3667 auth_data->bss->bssid, NULL, 0, 0,
3672 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3673 auth_data->bss->bssid, auth_data->tries,
3674 IEEE80211_AUTH_MAX_TRIES);
3677 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3683 * Direct probe is sent to broadcast address as some APs
3684 * will not answer to direct packet in unassociated state.
3686 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3687 ssidie + 2, ssidie[1],
3688 NULL, 0, (u32) -1, true, 0,
3689 auth_data->bss->channel, false);
3693 if (tx_flags == 0) {
3694 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3695 auth_data->timeout_started = true;
3696 run_again(sdata, auth_data->timeout);
3698 auth_data->timeout =
3699 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3700 auth_data->timeout_started = true;
3701 run_again(sdata, auth_data->timeout);
3707 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3709 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3710 struct ieee80211_local *local = sdata->local;
3712 sdata_assert_lock(sdata);
3714 assoc_data->tries++;
3715 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3716 sdata_info(sdata, "association with %pM timed out\n",
3717 assoc_data->bss->bssid);
3720 * Most likely AP is not in the range so remove the
3721 * bss struct for that AP.
3723 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3728 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3729 assoc_data->bss->bssid, assoc_data->tries,
3730 IEEE80211_ASSOC_MAX_TRIES);
3731 ieee80211_send_assoc(sdata);
3733 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3734 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3735 assoc_data->timeout_started = true;
3736 run_again(sdata, assoc_data->timeout);
3738 assoc_data->timeout =
3739 round_jiffies_up(jiffies +
3740 IEEE80211_ASSOC_TIMEOUT_LONG);
3741 assoc_data->timeout_started = true;
3742 run_again(sdata, assoc_data->timeout);
3748 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3749 __le16 fc, bool acked)
3751 struct ieee80211_local *local = sdata->local;
3753 sdata->u.mgd.status_fc = fc;
3754 sdata->u.mgd.status_acked = acked;
3755 sdata->u.mgd.status_received = true;
3757 ieee80211_queue_work(&local->hw, &sdata->work);
3760 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3762 struct ieee80211_local *local = sdata->local;
3763 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3767 if (ifmgd->status_received) {
3768 __le16 fc = ifmgd->status_fc;
3769 bool status_acked = ifmgd->status_acked;
3771 ifmgd->status_received = false;
3772 if (ifmgd->auth_data &&
3773 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3775 ifmgd->auth_data->timeout =
3776 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3777 run_again(sdata, ifmgd->auth_data->timeout);
3779 ifmgd->auth_data->timeout = jiffies - 1;
3781 ifmgd->auth_data->timeout_started = true;
3782 } else if (ifmgd->assoc_data &&
3783 (ieee80211_is_assoc_req(fc) ||
3784 ieee80211_is_reassoc_req(fc))) {
3786 ifmgd->assoc_data->timeout =
3787 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3788 run_again(sdata, ifmgd->assoc_data->timeout);
3790 ifmgd->assoc_data->timeout = jiffies - 1;
3792 ifmgd->assoc_data->timeout_started = true;
3796 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3797 time_after(jiffies, ifmgd->auth_data->timeout)) {
3798 if (ifmgd->auth_data->done) {
3800 * ok ... we waited for assoc but userspace didn't,
3801 * so let's just kill the auth data
3803 ieee80211_destroy_auth_data(sdata, false);
3804 } else if (ieee80211_probe_auth(sdata)) {
3807 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3809 ieee80211_destroy_auth_data(sdata, false);
3811 cfg80211_auth_timeout(sdata->dev, bssid);
3813 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3814 run_again(sdata, ifmgd->auth_data->timeout);
3816 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3817 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3818 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3819 ieee80211_do_assoc(sdata)) {
3820 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3822 ieee80211_destroy_assoc_data(sdata, false);
3823 cfg80211_assoc_timeout(sdata->dev, bss);
3825 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3826 run_again(sdata, ifmgd->assoc_data->timeout);
3828 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3829 ifmgd->associated) {
3833 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3835 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3836 max_tries = max_nullfunc_tries;
3838 max_tries = max_probe_tries;
3840 /* ACK received for nullfunc probing frame */
3841 if (!ifmgd->probe_send_count)
3842 ieee80211_reset_ap_probe(sdata);
3843 else if (ifmgd->nullfunc_failed) {
3844 if (ifmgd->probe_send_count < max_tries) {
3846 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3847 bssid, ifmgd->probe_send_count,
3849 ieee80211_mgd_probe_ap_send(sdata);
3852 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3854 ieee80211_sta_connection_lost(sdata, bssid,
3855 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3858 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3859 run_again(sdata, ifmgd->probe_timeout);
3860 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3862 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3863 bssid, probe_wait_ms);
3864 ieee80211_sta_connection_lost(sdata, bssid,
3865 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3866 } else if (ifmgd->probe_send_count < max_tries) {
3868 "No probe response from AP %pM after %dms, try %d/%i\n",
3869 bssid, probe_wait_ms,
3870 ifmgd->probe_send_count, max_tries);
3871 ieee80211_mgd_probe_ap_send(sdata);
3874 * We actually lost the connection ... or did we?
3877 wiphy_debug(local->hw.wiphy,
3878 "%s: No probe response from AP %pM"
3879 " after %dms, disconnecting.\n",
3881 bssid, probe_wait_ms);
3883 ieee80211_sta_connection_lost(sdata, bssid,
3884 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3888 sdata_unlock(sdata);
3891 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3893 struct ieee80211_sub_if_data *sdata =
3894 (struct ieee80211_sub_if_data *) data;
3895 struct ieee80211_local *local = sdata->local;
3896 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3898 if (local->quiescing)
3901 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3904 sdata->u.mgd.connection_loss = false;
3905 ieee80211_queue_work(&sdata->local->hw,
3906 &sdata->u.mgd.beacon_connection_loss_work);
3909 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3911 struct ieee80211_sub_if_data *sdata =
3912 (struct ieee80211_sub_if_data *) data;
3913 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3914 struct ieee80211_local *local = sdata->local;
3916 if (local->quiescing)
3919 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3922 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3925 static void ieee80211_sta_monitor_work(struct work_struct *work)
3927 struct ieee80211_sub_if_data *sdata =
3928 container_of(work, struct ieee80211_sub_if_data,
3929 u.mgd.monitor_work);
3931 ieee80211_mgd_probe_ap(sdata, false);
3934 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3938 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3939 __ieee80211_stop_poll(sdata);
3941 /* let's probe the connection once */
3942 flags = sdata->local->hw.flags;
3943 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3944 ieee80211_queue_work(&sdata->local->hw,
3945 &sdata->u.mgd.monitor_work);
3946 /* and do all the other regular work too */
3947 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3952 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3954 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3955 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3959 if (ifmgd->auth_data || ifmgd->assoc_data) {
3960 const u8 *bssid = ifmgd->auth_data ?
3961 ifmgd->auth_data->bss->bssid :
3962 ifmgd->assoc_data->bss->bssid;
3965 * If we are trying to authenticate / associate while suspending,
3966 * cfg80211 won't know and won't actually abort those attempts,
3967 * thus we need to do that ourselves.
3969 ieee80211_send_deauth_disassoc(sdata, bssid,
3970 IEEE80211_STYPE_DEAUTH,
3971 WLAN_REASON_DEAUTH_LEAVING,
3973 if (ifmgd->assoc_data)
3974 ieee80211_destroy_assoc_data(sdata, false);
3975 if (ifmgd->auth_data)
3976 ieee80211_destroy_auth_data(sdata, false);
3977 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3978 IEEE80211_DEAUTH_FRAME_LEN);
3981 sdata_unlock(sdata);
3984 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3986 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3989 if (!ifmgd->associated) {
3990 sdata_unlock(sdata);
3994 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3995 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3996 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3997 ieee80211_sta_connection_lost(sdata,
3998 ifmgd->associated->bssid,
3999 WLAN_REASON_UNSPECIFIED,
4001 sdata_unlock(sdata);
4004 sdata_unlock(sdata);
4008 /* interface setup */
4009 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4011 struct ieee80211_if_managed *ifmgd;
4013 ifmgd = &sdata->u.mgd;
4014 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4015 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4016 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4017 ieee80211_beacon_connection_loss_work);
4018 INIT_WORK(&ifmgd->csa_connection_drop_work,
4019 ieee80211_csa_connection_drop_work);
4020 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4021 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4022 ieee80211_tdls_peer_del_work);
4023 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4024 (unsigned long) sdata);
4025 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4026 (unsigned long) sdata);
4027 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4028 (unsigned long) sdata);
4029 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4030 (unsigned long) sdata);
4031 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4032 ieee80211_sta_handle_tspec_ac_params_wk);
4035 ifmgd->powersave = sdata->wdev.ps;
4036 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4037 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4038 ifmgd->p2p_noa_index = -1;
4040 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4041 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4043 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4045 /* Setup TDLS data */
4046 spin_lock_init(&ifmgd->teardown_lock);
4047 ifmgd->teardown_skb = NULL;
4048 ifmgd->orig_teardown_skb = NULL;
4051 /* scan finished notification */
4052 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4054 struct ieee80211_sub_if_data *sdata;
4056 /* Restart STA timers */
4058 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4059 if (ieee80211_sdata_running(sdata))
4060 ieee80211_restart_sta_timer(sdata);
4065 int ieee80211_max_network_latency(struct notifier_block *nb,
4066 unsigned long data, void *dummy)
4068 s32 latency_usec = (s32) data;
4069 struct ieee80211_local *local =
4070 container_of(nb, struct ieee80211_local,
4071 network_latency_notifier);
4073 mutex_lock(&local->iflist_mtx);
4074 ieee80211_recalc_ps(local, latency_usec);
4075 mutex_unlock(&local->iflist_mtx);
4080 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4081 struct cfg80211_bss *cbss)
4083 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4084 const u8 *ht_cap_ie, *vht_cap_ie;
4085 const struct ieee80211_ht_cap *ht_cap;
4086 const struct ieee80211_vht_cap *vht_cap;
4089 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4092 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4093 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4094 ht_cap = (void *)(ht_cap_ie + 2);
4095 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4097 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4098 * "Tx Unequal Modulation Supported" fields.
4102 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4105 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4106 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4110 vht_cap = (void *)(vht_cap_ie + 2);
4111 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4112 for (nss = 8; nss > 0; nss--) {
4113 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4114 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4117 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4118 chains = max(chains, nss);
4124 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4125 struct cfg80211_bss *cbss)
4127 struct ieee80211_local *local = sdata->local;
4128 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4129 const struct ieee80211_ht_cap *ht_cap = NULL;
4130 const struct ieee80211_ht_operation *ht_oper = NULL;
4131 const struct ieee80211_vht_operation *vht_oper = NULL;
4132 struct ieee80211_supported_band *sband;
4133 struct cfg80211_chan_def chandef;
4136 sband = local->hw.wiphy->bands[cbss->channel->band];
4138 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4139 IEEE80211_STA_DISABLE_80P80MHZ |
4140 IEEE80211_STA_DISABLE_160MHZ);
4144 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4145 sband->ht_cap.ht_supported) {
4146 const u8 *ht_oper_ie, *ht_cap_ie;
4148 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4149 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4150 ht_oper = (void *)(ht_oper_ie + 2);
4152 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4153 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4154 ht_cap = (void *)(ht_cap_ie + 2);
4157 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4162 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4163 sband->vht_cap.vht_supported) {
4164 const u8 *vht_oper_ie, *vht_cap;
4166 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4167 WLAN_EID_VHT_OPERATION);
4168 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4169 vht_oper = (void *)(vht_oper_ie + 2);
4170 if (vht_oper && !ht_oper) {
4173 "AP advertised VHT without HT, disabling both\n");
4174 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4175 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4178 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4179 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4180 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4185 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4187 ht_cap, ht_oper, vht_oper,
4190 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4195 /* will change later if needed */
4196 sdata->smps_mode = IEEE80211_SMPS_OFF;
4198 mutex_lock(&local->mtx);
4200 * If this fails (possibly due to channel context sharing
4201 * on incompatible channels, e.g. 80+80 and 160 sharing the
4202 * same control channel) try to use a smaller bandwidth.
4204 ret = ieee80211_vif_use_channel(sdata, &chandef,
4205 IEEE80211_CHANCTX_SHARED);
4207 /* don't downgrade for 5 and 10 MHz channels, though. */
4208 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4209 chandef.width == NL80211_CHAN_WIDTH_10)
4212 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4213 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4214 ret = ieee80211_vif_use_channel(sdata, &chandef,
4215 IEEE80211_CHANCTX_SHARED);
4218 mutex_unlock(&local->mtx);
4222 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4223 struct cfg80211_bss *cbss, bool assoc)
4225 struct ieee80211_local *local = sdata->local;
4226 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4227 struct ieee80211_bss *bss = (void *)cbss->priv;
4228 struct sta_info *new_sta = NULL;
4229 struct ieee80211_supported_band *sband;
4230 struct ieee80211_sta_ht_cap sta_ht_cap;
4231 bool have_sta = false, is_override = false;
4234 sband = local->hw.wiphy->bands[cbss->channel->band];
4236 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4241 have_sta = sta_info_get(sdata, cbss->bssid);
4246 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4251 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4252 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4254 is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
4255 (sband->ht_cap.cap &
4256 IEEE80211_HT_CAP_SUP_WIDTH_20_40);
4258 if (new_sta || is_override) {
4259 err = ieee80211_prep_channel(sdata, cbss);
4262 sta_info_free(local, new_sta);
4268 u32 rates = 0, basic_rates = 0;
4269 bool have_higher_than_11mbit;
4270 int min_rate = INT_MAX, min_rate_index = -1;
4271 struct ieee80211_chanctx_conf *chanctx_conf;
4272 const struct cfg80211_bss_ies *ies;
4273 int shift = ieee80211_vif_get_shift(&sdata->vif);
4277 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4278 if (WARN_ON(!chanctx_conf)) {
4280 sta_info_free(local, new_sta);
4283 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4286 ieee80211_get_rates(sband, bss->supp_rates,
4287 bss->supp_rates_len,
4288 &rates, &basic_rates,
4289 &have_higher_than_11mbit,
4290 &min_rate, &min_rate_index,
4294 * This used to be a workaround for basic rates missing
4295 * in the association response frame. Now that we no
4296 * longer use the basic rates from there, it probably
4297 * doesn't happen any more, but keep the workaround so
4298 * in case some *other* APs are buggy in different ways
4299 * we can connect -- with a warning.
4301 if (!basic_rates && min_rate_index >= 0) {
4303 "No basic rates, using min rate instead\n");
4304 basic_rates = BIT(min_rate_index);
4307 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4308 sdata->vif.bss_conf.basic_rates = basic_rates;
4310 /* cf. IEEE 802.11 9.2.12 */
4311 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4312 have_higher_than_11mbit)
4313 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4315 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4317 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4319 /* set timing information */
4320 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4322 ies = rcu_dereference(cbss->beacon_ies);
4326 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4327 sdata->vif.bss_conf.sync_device_ts =
4328 bss->device_ts_beacon;
4329 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4330 ies->data, ies->len);
4331 if (tim_ie && tim_ie[1] >= 2)
4332 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4334 sdata->vif.bss_conf.sync_dtim_count = 0;
4335 } else if (!(local->hw.flags &
4336 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4337 ies = rcu_dereference(cbss->proberesp_ies);
4338 /* must be non-NULL since beacon IEs were NULL */
4339 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4340 sdata->vif.bss_conf.sync_device_ts =
4341 bss->device_ts_presp;
4342 sdata->vif.bss_conf.sync_dtim_count = 0;
4344 sdata->vif.bss_conf.sync_tsf = 0;
4345 sdata->vif.bss_conf.sync_device_ts = 0;
4346 sdata->vif.bss_conf.sync_dtim_count = 0;
4350 /* tell driver about BSSID, basic rates and timing */
4351 ieee80211_bss_info_change_notify(sdata,
4352 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4353 BSS_CHANGED_BEACON_INT);
4356 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4358 err = sta_info_insert(new_sta);
4362 "failed to insert STA entry for the AP (error %d)\n",
4367 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4373 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4374 struct cfg80211_auth_request *req)
4376 struct ieee80211_local *local = sdata->local;
4377 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4378 struct ieee80211_mgd_auth_data *auth_data;
4382 /* prepare auth data structure */
4384 switch (req->auth_type) {
4385 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4386 auth_alg = WLAN_AUTH_OPEN;
4388 case NL80211_AUTHTYPE_SHARED_KEY:
4389 if (IS_ERR(local->wep_tx_tfm))
4391 auth_alg = WLAN_AUTH_SHARED_KEY;
4393 case NL80211_AUTHTYPE_FT:
4394 auth_alg = WLAN_AUTH_FT;
4396 case NL80211_AUTHTYPE_NETWORK_EAP:
4397 auth_alg = WLAN_AUTH_LEAP;
4399 case NL80211_AUTHTYPE_SAE:
4400 auth_alg = WLAN_AUTH_SAE;
4406 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4407 req->ie_len, GFP_KERNEL);
4411 auth_data->bss = req->bss;
4413 if (req->sae_data_len >= 4) {
4414 __le16 *pos = (__le16 *) req->sae_data;
4415 auth_data->sae_trans = le16_to_cpu(pos[0]);
4416 auth_data->sae_status = le16_to_cpu(pos[1]);
4417 memcpy(auth_data->data, req->sae_data + 4,
4418 req->sae_data_len - 4);
4419 auth_data->data_len += req->sae_data_len - 4;
4422 if (req->ie && req->ie_len) {
4423 memcpy(&auth_data->data[auth_data->data_len],
4424 req->ie, req->ie_len);
4425 auth_data->data_len += req->ie_len;
4428 if (req->key && req->key_len) {
4429 auth_data->key_len = req->key_len;
4430 auth_data->key_idx = req->key_idx;
4431 memcpy(auth_data->key, req->key, req->key_len);
4434 auth_data->algorithm = auth_alg;
4436 /* try to authenticate/probe */
4438 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4439 ifmgd->assoc_data) {
4444 if (ifmgd->auth_data)
4445 ieee80211_destroy_auth_data(sdata, false);
4447 /* prep auth_data so we don't go into idle on disassoc */
4448 ifmgd->auth_data = auth_data;
4450 if (ifmgd->associated) {
4451 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4453 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4454 WLAN_REASON_UNSPECIFIED,
4457 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4461 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4463 err = ieee80211_prep_connection(sdata, req->bss, false);
4467 err = ieee80211_probe_auth(sdata);
4469 sta_info_destroy_addr(sdata, req->bss->bssid);
4473 /* hold our own reference */
4474 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4478 memset(ifmgd->bssid, 0, ETH_ALEN);
4479 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4480 ifmgd->auth_data = NULL;
4486 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4487 const u8 *wmm_param, int len)
4495 if (wmm_param[5] != 1 /* version */)
4498 pos = wmm_param + 8;
4501 for (; left >= 4; left -= 4, pos += 4) {
4502 u8 aifsn = pos[0] & 0x0f;
4503 u8 ecwmin = pos[1] & 0x0f;
4504 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4505 int aci = (pos[0] >> 5) & 0x03;
4509 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4513 if (ecwmin > ecwmax) {
4515 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4516 ecwmin, ecwmax, aci);
4524 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4525 struct cfg80211_assoc_request *req)
4527 struct ieee80211_local *local = sdata->local;
4528 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4529 struct ieee80211_bss *bss = (void *)req->bss->priv;
4530 struct ieee80211_mgd_assoc_data *assoc_data;
4531 const struct cfg80211_bss_ies *beacon_ies;
4532 struct ieee80211_supported_band *sband;
4533 const u8 *ssidie, *ht_ie, *vht_ie;
4536 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4541 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4547 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4548 assoc_data->ssid_len = ssidie[1];
4551 if (ifmgd->associated) {
4552 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4554 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4555 WLAN_REASON_UNSPECIFIED,
4558 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4562 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4567 if (ifmgd->assoc_data) {
4572 if (ifmgd->auth_data) {
4575 /* keep sta info, bssid if matching */
4576 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4577 ieee80211_destroy_auth_data(sdata, match);
4580 /* prepare assoc data */
4582 ifmgd->beacon_crc_valid = false;
4584 assoc_data->wmm = bss->wmm_used &&
4585 (local->hw.queues >= IEEE80211_NUM_ACS);
4586 if (assoc_data->wmm) {
4587 /* try to check validity of WMM params IE */
4588 const struct cfg80211_bss_ies *ies;
4589 const u8 *wp, *start, *end;
4592 ies = rcu_dereference(req->bss->ies);
4594 end = start + ies->len;
4597 wp = cfg80211_find_vendor_ie(
4599 WLAN_OUI_TYPE_MICROSOFT_WMM,
4600 start, end - start);
4603 start = wp + wp[1] + 2;
4604 /* if this IE is too short, try the next */
4607 /* if this IE is WMM params, we found what we wanted */
4612 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4614 assoc_data->wmm = false;
4615 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4621 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4622 * We still associate in non-HT mode (11a/b/g) if any one of these
4623 * ciphers is configured as pairwise.
4624 * We can set this to true for non-11n hardware, that'll be checked
4625 * separately along with the peer capabilities.
4627 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4628 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4629 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4630 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4631 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4632 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4633 netdev_info(sdata->dev,
4634 "disabling HT/VHT due to WEP/TKIP use\n");
4638 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4639 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4640 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4643 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4644 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4646 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4647 sband = local->hw.wiphy->bands[req->bss->channel->band];
4648 if (!sband->ht_cap.ht_supported ||
4649 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4650 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4651 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4652 if (!bss->wmm_used &&
4653 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4654 netdev_info(sdata->dev,
4655 "disabling HT as WMM/QoS is not supported by the AP\n");
4658 /* disable VHT if we don't support it or the AP doesn't use WMM */
4659 if (!sband->vht_cap.vht_supported ||
4660 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4661 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4662 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4663 if (!bss->wmm_used &&
4664 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4665 netdev_info(sdata->dev,
4666 "disabling VHT as WMM/QoS is not supported by the AP\n");
4669 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4670 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4671 sizeof(ifmgd->ht_capa_mask));
4673 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4674 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4675 sizeof(ifmgd->vht_capa_mask));
4677 if (req->ie && req->ie_len) {
4678 memcpy(assoc_data->ie, req->ie, req->ie_len);
4679 assoc_data->ie_len = req->ie_len;
4682 assoc_data->bss = req->bss;
4684 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4685 if (ifmgd->powersave)
4686 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4688 sdata->smps_mode = IEEE80211_SMPS_OFF;
4690 sdata->smps_mode = ifmgd->req_smps;
4692 assoc_data->capability = req->bss->capability;
4693 assoc_data->supp_rates = bss->supp_rates;
4694 assoc_data->supp_rates_len = bss->supp_rates_len;
4697 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4698 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4699 assoc_data->ap_ht_param =
4700 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4702 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4703 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4704 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4705 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4706 sizeof(struct ieee80211_vht_cap));
4708 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4711 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4712 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4713 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4714 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4716 if (bss->wmm_used && bss->uapsd_supported &&
4717 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4718 assoc_data->uapsd = true;
4719 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4721 assoc_data->uapsd = false;
4722 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4725 if (req->prev_bssid)
4726 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4729 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4730 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4732 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4733 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4736 if (req->flags & ASSOC_REQ_USE_RRM)
4737 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4739 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4741 if (req->crypto.control_port)
4742 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4744 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4746 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4747 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4748 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4751 /* kick off associate process */
4753 ifmgd->assoc_data = assoc_data;
4754 ifmgd->dtim_period = 0;
4755 ifmgd->have_beacon = false;
4757 err = ieee80211_prep_connection(sdata, req->bss, true);
4762 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4764 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4767 * Wait up to one beacon interval ...
4768 * should this be more if we miss one?
4770 sdata_info(sdata, "waiting for beacon from %pM\n",
4772 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4773 assoc_data->timeout_started = true;
4774 assoc_data->need_beacon = true;
4775 } else if (beacon_ies) {
4776 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4781 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4782 const struct ieee80211_tim_ie *tim;
4783 tim = (void *)(tim_ie + 2);
4784 ifmgd->dtim_period = tim->dtim_period;
4785 dtim_count = tim->dtim_count;
4787 ifmgd->have_beacon = true;
4788 assoc_data->timeout = jiffies;
4789 assoc_data->timeout_started = true;
4791 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4792 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4793 sdata->vif.bss_conf.sync_device_ts =
4794 bss->device_ts_beacon;
4795 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4798 assoc_data->timeout = jiffies;
4799 assoc_data->timeout_started = true;
4803 run_again(sdata, assoc_data->timeout);
4805 if (bss->corrupt_data) {
4806 char *corrupt_type = "data";
4807 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4808 if (bss->corrupt_data &
4809 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4810 corrupt_type = "beacon and probe response";
4812 corrupt_type = "beacon";
4813 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4814 corrupt_type = "probe response";
4815 sdata_info(sdata, "associating with AP with corrupt %s\n",
4821 memset(ifmgd->bssid, 0, ETH_ALEN);
4822 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4823 ifmgd->assoc_data = NULL;
4829 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4830 struct cfg80211_deauth_request *req)
4832 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4833 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4834 bool tx = !req->local_state_change;
4836 if (ifmgd->auth_data &&
4837 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4839 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4840 req->bssid, req->reason_code,
4841 ieee80211_get_reason_code_string(req->reason_code));
4843 drv_mgd_prepare_tx(sdata->local, sdata);
4844 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4845 IEEE80211_STYPE_DEAUTH,
4846 req->reason_code, tx,
4848 ieee80211_destroy_auth_data(sdata, false);
4849 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4850 IEEE80211_DEAUTH_FRAME_LEN);
4855 if (ifmgd->associated &&
4856 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4858 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4859 req->bssid, req->reason_code,
4860 ieee80211_get_reason_code_string(req->reason_code));
4862 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4863 req->reason_code, tx, frame_buf);
4864 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4865 IEEE80211_DEAUTH_FRAME_LEN);
4872 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4873 struct cfg80211_disassoc_request *req)
4875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4877 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4880 * cfg80211 should catch this ... but it's racy since
4881 * we can receive a disassoc frame, process it, hand it
4882 * to cfg80211 while that's in a locked section already
4883 * trying to tell us that the user wants to disconnect.
4885 if (ifmgd->associated != req->bss)
4889 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4890 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4892 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4893 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4894 req->reason_code, !req->local_state_change,
4897 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4898 IEEE80211_DEAUTH_FRAME_LEN);
4903 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4905 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4908 * Make sure some work items will not run after this,
4909 * they will not do anything but might not have been
4910 * cancelled when disconnecting.
4912 cancel_work_sync(&ifmgd->monitor_work);
4913 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4914 cancel_work_sync(&ifmgd->request_smps_work);
4915 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4916 cancel_work_sync(&ifmgd->chswitch_work);
4917 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4920 if (ifmgd->assoc_data) {
4921 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4922 ieee80211_destroy_assoc_data(sdata, false);
4923 cfg80211_assoc_timeout(sdata->dev, bss);
4925 if (ifmgd->auth_data)
4926 ieee80211_destroy_auth_data(sdata, false);
4927 spin_lock_bh(&ifmgd->teardown_lock);
4928 if (ifmgd->teardown_skb) {
4929 kfree_skb(ifmgd->teardown_skb);
4930 ifmgd->teardown_skb = NULL;
4931 ifmgd->orig_teardown_skb = NULL;
4933 spin_unlock_bh(&ifmgd->teardown_lock);
4934 del_timer_sync(&ifmgd->timer);
4935 sdata_unlock(sdata);
4938 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4939 enum nl80211_cqm_rssi_threshold_event rssi_event,
4942 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4944 trace_api_cqm_rssi_notify(sdata, rssi_event);
4946 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4948 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
4950 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4952 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4954 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
4956 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
4958 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);