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 goto drop_connection;
1163 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1165 if (local->use_chanctx &&
1166 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1168 "driver doesn't support chan-switch with channel contexts\n");
1169 goto drop_connection;
1172 ch_switch.timestamp = timestamp;
1173 ch_switch.device_timestamp = device_timestamp;
1174 ch_switch.block_tx = csa_ie.mode;
1175 ch_switch.chandef = csa_ie.chandef;
1176 ch_switch.count = csa_ie.count;
1178 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1180 "preparing for channel switch failed, disconnecting\n");
1181 goto drop_connection;
1184 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1185 chanctx->mode, false);
1188 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1190 goto drop_connection;
1192 mutex_unlock(&local->chanctx_mtx);
1194 sdata->vif.csa_active = true;
1195 sdata->csa_chandef = csa_ie.chandef;
1196 sdata->csa_block_tx = csa_ie.mode;
1198 if (sdata->csa_block_tx)
1199 ieee80211_stop_vif_queues(local, sdata,
1200 IEEE80211_QUEUE_STOP_REASON_CSA);
1201 mutex_unlock(&local->mtx);
1203 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1206 if (local->ops->channel_switch) {
1207 /* use driver's channel switch callback */
1208 drv_channel_switch(local, sdata, &ch_switch);
1212 /* channel switch handled in software */
1213 if (csa_ie.count <= 1)
1214 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1216 mod_timer(&ifmgd->chswitch_timer,
1217 TU_TO_EXP_TIME((csa_ie.count - 1) *
1218 cbss->beacon_interval));
1221 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1222 mutex_unlock(&local->chanctx_mtx);
1223 mutex_unlock(&local->mtx);
1227 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1228 struct ieee80211_channel *channel,
1229 const u8 *country_ie, u8 country_ie_len,
1230 const u8 *pwr_constr_elem,
1231 int *chan_pwr, int *pwr_reduction)
1233 struct ieee80211_country_ie_triplet *triplet;
1234 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1235 int i, chan_increment;
1236 bool have_chan_pwr = false;
1239 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1242 triplet = (void *)(country_ie + 3);
1243 country_ie_len -= 3;
1245 switch (channel->band) {
1249 case IEEE80211_BAND_2GHZ:
1250 case IEEE80211_BAND_60GHZ:
1253 case IEEE80211_BAND_5GHZ:
1259 while (country_ie_len >= 3) {
1260 u8 first_channel = triplet->chans.first_channel;
1262 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1265 for (i = 0; i < triplet->chans.num_channels; i++) {
1266 if (first_channel + i * chan_increment == chan) {
1267 have_chan_pwr = true;
1268 *chan_pwr = triplet->chans.max_power;
1277 country_ie_len -= 3;
1280 if (have_chan_pwr && pwr_constr_elem)
1281 *pwr_reduction = *pwr_constr_elem;
1285 return have_chan_pwr;
1288 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1289 struct ieee80211_channel *channel,
1290 const u8 *cisco_dtpc_ie,
1293 /* From practical testing, the first data byte of the DTPC element
1294 * seems to contain the requested dBm level, and the CLI on Cisco
1295 * APs clearly state the range is -127 to 127 dBm, which indicates
1296 * a signed byte, although it seemingly never actually goes negative.
1297 * The other byte seems to always be zero.
1299 *pwr_level = (__s8)cisco_dtpc_ie[4];
1302 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1303 struct ieee80211_channel *channel,
1304 struct ieee80211_mgmt *mgmt,
1305 const u8 *country_ie, u8 country_ie_len,
1306 const u8 *pwr_constr_ie,
1307 const u8 *cisco_dtpc_ie)
1309 bool has_80211h_pwr = false, has_cisco_pwr = false;
1310 int chan_pwr = 0, pwr_reduction_80211h = 0;
1311 int pwr_level_cisco, pwr_level_80211h;
1313 __le16 capab = mgmt->u.probe_resp.capab_info;
1316 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1317 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1318 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1319 sdata, channel, country_ie, country_ie_len,
1320 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1322 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1325 if (cisco_dtpc_ie) {
1326 ieee80211_find_cisco_dtpc(
1327 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1328 has_cisco_pwr = true;
1331 if (!has_80211h_pwr && !has_cisco_pwr)
1334 /* If we have both 802.11h and Cisco DTPC, apply both limits
1335 * by picking the smallest of the two power levels advertised.
1337 if (has_80211h_pwr &&
1338 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1340 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1341 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1342 sdata->u.mgd.bssid);
1343 new_ap_level = pwr_level_80211h;
1344 } else { /* has_cisco_pwr is always true here. */
1346 "Limiting TX power to %d dBm as advertised by %pM\n",
1347 pwr_level_cisco, sdata->u.mgd.bssid);
1348 new_ap_level = pwr_level_cisco;
1351 if (sdata->ap_power_level == new_ap_level)
1354 sdata->ap_power_level = new_ap_level;
1355 if (__ieee80211_recalc_txpower(sdata))
1356 return BSS_CHANGED_TXPOWER;
1361 static void ieee80211_enable_ps(struct ieee80211_local *local,
1362 struct ieee80211_sub_if_data *sdata)
1364 struct ieee80211_conf *conf = &local->hw.conf;
1367 * If we are scanning right now then the parameters will
1368 * take effect when scan finishes.
1370 if (local->scanning)
1373 if (conf->dynamic_ps_timeout > 0 &&
1374 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1375 mod_timer(&local->dynamic_ps_timer, jiffies +
1376 msecs_to_jiffies(conf->dynamic_ps_timeout));
1378 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1379 ieee80211_send_nullfunc(local, sdata, 1);
1381 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1382 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1385 conf->flags |= IEEE80211_CONF_PS;
1386 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1390 static void ieee80211_change_ps(struct ieee80211_local *local)
1392 struct ieee80211_conf *conf = &local->hw.conf;
1394 if (local->ps_sdata) {
1395 ieee80211_enable_ps(local, local->ps_sdata);
1396 } else if (conf->flags & IEEE80211_CONF_PS) {
1397 conf->flags &= ~IEEE80211_CONF_PS;
1398 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1399 del_timer_sync(&local->dynamic_ps_timer);
1400 cancel_work_sync(&local->dynamic_ps_enable_work);
1404 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1406 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1407 struct sta_info *sta = NULL;
1408 bool authorized = false;
1410 if (!mgd->powersave)
1416 if (!mgd->associated)
1419 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1422 if (!mgd->have_beacon)
1426 sta = sta_info_get(sdata, mgd->bssid);
1428 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1434 /* need to hold RTNL or interface lock */
1435 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1437 struct ieee80211_sub_if_data *sdata, *found = NULL;
1441 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1442 local->ps_sdata = NULL;
1446 list_for_each_entry(sdata, &local->interfaces, list) {
1447 if (!ieee80211_sdata_running(sdata))
1449 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1450 /* If an AP vif is found, then disable PS
1451 * by setting the count to zero thereby setting
1457 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1463 if (count == 1 && ieee80211_powersave_allowed(found)) {
1467 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1469 beaconint_us = ieee80211_tu_to_usec(
1470 found->vif.bss_conf.beacon_int);
1472 timeout = local->dynamic_ps_forced_timeout;
1475 * Go to full PSM if the user configures a very low
1476 * latency requirement.
1477 * The 2000 second value is there for compatibility
1478 * until the PM_QOS_NETWORK_LATENCY is configured
1481 if (latency > (1900 * USEC_PER_MSEC) &&
1482 latency != (2000 * USEC_PER_SEC))
1487 local->hw.conf.dynamic_ps_timeout = timeout;
1489 if (beaconint_us > latency) {
1490 local->ps_sdata = NULL;
1493 u8 dtimper = found->u.mgd.dtim_period;
1495 /* If the TIM IE is invalid, pretend the value is 1 */
1498 else if (dtimper > 1)
1499 maxslp = min_t(int, dtimper,
1500 latency / beaconint_us);
1502 local->hw.conf.max_sleep_period = maxslp;
1503 local->hw.conf.ps_dtim_period = dtimper;
1504 local->ps_sdata = found;
1507 local->ps_sdata = NULL;
1510 ieee80211_change_ps(local);
1513 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1515 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1517 if (sdata->vif.bss_conf.ps != ps_allowed) {
1518 sdata->vif.bss_conf.ps = ps_allowed;
1519 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1523 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1525 struct ieee80211_local *local =
1526 container_of(work, struct ieee80211_local,
1527 dynamic_ps_disable_work);
1529 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1530 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1531 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1534 ieee80211_wake_queues_by_reason(&local->hw,
1535 IEEE80211_MAX_QUEUE_MAP,
1536 IEEE80211_QUEUE_STOP_REASON_PS,
1540 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1542 struct ieee80211_local *local =
1543 container_of(work, struct ieee80211_local,
1544 dynamic_ps_enable_work);
1545 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1546 struct ieee80211_if_managed *ifmgd;
1547 unsigned long flags;
1550 /* can only happen when PS was just disabled anyway */
1554 ifmgd = &sdata->u.mgd;
1556 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1559 if (local->hw.conf.dynamic_ps_timeout > 0) {
1560 /* don't enter PS if TX frames are pending */
1561 if (drv_tx_frames_pending(local)) {
1562 mod_timer(&local->dynamic_ps_timer, jiffies +
1564 local->hw.conf.dynamic_ps_timeout));
1569 * transmission can be stopped by others which leads to
1570 * dynamic_ps_timer expiry. Postpone the ps timer if it
1571 * is not the actual idle state.
1573 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1574 for (q = 0; q < local->hw.queues; q++) {
1575 if (local->queue_stop_reasons[q]) {
1576 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1578 mod_timer(&local->dynamic_ps_timer, jiffies +
1580 local->hw.conf.dynamic_ps_timeout));
1584 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1587 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1588 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1589 if (drv_tx_frames_pending(local)) {
1590 mod_timer(&local->dynamic_ps_timer, jiffies +
1592 local->hw.conf.dynamic_ps_timeout));
1594 ieee80211_send_nullfunc(local, sdata, 1);
1595 /* Flush to get the tx status of nullfunc frame */
1596 ieee80211_flush_queues(local, sdata, false);
1600 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1601 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1602 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1603 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1604 local->hw.conf.flags |= IEEE80211_CONF_PS;
1605 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1609 void ieee80211_dynamic_ps_timer(unsigned long data)
1611 struct ieee80211_local *local = (void *) data;
1613 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1616 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1618 struct delayed_work *delayed_work =
1619 container_of(work, struct delayed_work, work);
1620 struct ieee80211_sub_if_data *sdata =
1621 container_of(delayed_work, struct ieee80211_sub_if_data,
1622 dfs_cac_timer_work);
1623 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1625 mutex_lock(&sdata->local->mtx);
1626 if (sdata->wdev.cac_started) {
1627 ieee80211_vif_release_channel(sdata);
1628 cfg80211_cac_event(sdata->dev, &chandef,
1629 NL80211_RADAR_CAC_FINISHED,
1632 mutex_unlock(&sdata->local->mtx);
1636 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1638 struct ieee80211_local *local = sdata->local;
1639 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1643 if (local->hw.queues < IEEE80211_NUM_ACS)
1646 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1647 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1649 unsigned long now = jiffies;
1651 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1652 tx_tspec->admitted_time &&
1653 time_after(now, tx_tspec->time_slice_start + HZ)) {
1654 tx_tspec->consumed_tx_time = 0;
1655 tx_tspec->time_slice_start = now;
1657 if (tx_tspec->downgraded)
1659 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1662 switch (tx_tspec->action) {
1663 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1664 /* take the original parameters */
1665 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1667 "failed to set TX queue parameters for queue %d\n",
1669 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1670 tx_tspec->downgraded = false;
1673 case TX_TSPEC_ACTION_DOWNGRADE:
1674 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1675 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1679 /* downgrade next lower non-ACM AC */
1680 for (non_acm_ac = ac + 1;
1681 non_acm_ac < IEEE80211_NUM_ACS;
1683 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1685 /* The loop will result in using BK even if it requires
1686 * admission control, such configuration makes no sense
1687 * and we have to transmit somehow - the AC selection
1688 * does the same thing.
1690 if (drv_conf_tx(local, sdata, ac,
1691 &sdata->tx_conf[non_acm_ac]))
1693 "failed to set TX queue parameters for queue %d\n",
1695 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1697 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1698 tx_tspec->time_slice_start + HZ - now + 1);
1700 case TX_TSPEC_ACTION_NONE:
1709 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1711 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1712 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1715 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1717 struct ieee80211_sub_if_data *sdata;
1719 sdata = container_of(work, struct ieee80211_sub_if_data,
1720 u.mgd.tx_tspec_wk.work);
1721 ieee80211_sta_handle_tspec_ac_params(sdata);
1725 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1726 struct ieee80211_sub_if_data *sdata,
1727 const u8 *wmm_param, size_t wmm_param_len)
1729 struct ieee80211_tx_queue_params params;
1730 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1734 u8 uapsd_queues = 0;
1736 if (!local->ops->conf_tx)
1739 if (local->hw.queues < IEEE80211_NUM_ACS)
1745 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1748 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1749 uapsd_queues = ifmgd->uapsd_queues;
1751 count = wmm_param[6] & 0x0f;
1752 if (count == ifmgd->wmm_last_param_set)
1754 ifmgd->wmm_last_param_set = count;
1756 pos = wmm_param + 8;
1757 left = wmm_param_len - 8;
1759 memset(¶ms, 0, sizeof(params));
1762 for (; left >= 4; left -= 4, pos += 4) {
1763 int aci = (pos[0] >> 5) & 0x03;
1764 int acm = (pos[0] >> 4) & 0x01;
1772 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1773 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1779 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1780 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1786 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1787 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1794 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1795 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1800 params.aifs = pos[0] & 0x0f;
1801 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1802 params.cw_min = ecw2cw(pos[1] & 0x0f);
1803 params.txop = get_unaligned_le16(pos + 2);
1805 params.uapsd = uapsd;
1808 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1810 params.aifs, params.cw_min, params.cw_max,
1811 params.txop, params.uapsd,
1812 ifmgd->tx_tspec[queue].downgraded);
1813 sdata->tx_conf[queue] = params;
1814 if (!ifmgd->tx_tspec[queue].downgraded &&
1815 drv_conf_tx(local, sdata, queue, ¶ms))
1817 "failed to set TX queue parameters for queue %d\n",
1821 /* enable WMM or activate new settings */
1822 sdata->vif.bss_conf.qos = true;
1826 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1828 lockdep_assert_held(&sdata->local->mtx);
1830 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1831 ieee80211_run_deferred_scan(sdata->local);
1834 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1836 mutex_lock(&sdata->local->mtx);
1837 __ieee80211_stop_poll(sdata);
1838 mutex_unlock(&sdata->local->mtx);
1841 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1842 u16 capab, bool erp_valid, u8 erp)
1844 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1846 bool use_protection;
1847 bool use_short_preamble;
1848 bool use_short_slot;
1851 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1852 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1854 use_protection = false;
1855 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1858 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1859 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1860 use_short_slot = true;
1862 if (use_protection != bss_conf->use_cts_prot) {
1863 bss_conf->use_cts_prot = use_protection;
1864 changed |= BSS_CHANGED_ERP_CTS_PROT;
1867 if (use_short_preamble != bss_conf->use_short_preamble) {
1868 bss_conf->use_short_preamble = use_short_preamble;
1869 changed |= BSS_CHANGED_ERP_PREAMBLE;
1872 if (use_short_slot != bss_conf->use_short_slot) {
1873 bss_conf->use_short_slot = use_short_slot;
1874 changed |= BSS_CHANGED_ERP_SLOT;
1880 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1881 struct cfg80211_bss *cbss,
1882 u32 bss_info_changed)
1884 struct ieee80211_bss *bss = (void *)cbss->priv;
1885 struct ieee80211_local *local = sdata->local;
1886 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1888 bss_info_changed |= BSS_CHANGED_ASSOC;
1889 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1890 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1892 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1893 beacon_loss_count * bss_conf->beacon_int));
1895 sdata->u.mgd.associated = cbss;
1896 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1898 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1900 if (sdata->vif.p2p) {
1901 const struct cfg80211_bss_ies *ies;
1904 ies = rcu_dereference(cbss->ies);
1908 ret = cfg80211_get_p2p_attr(
1909 ies->data, ies->len,
1910 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1911 (u8 *) &bss_conf->p2p_noa_attr,
1912 sizeof(bss_conf->p2p_noa_attr));
1914 sdata->u.mgd.p2p_noa_index =
1915 bss_conf->p2p_noa_attr.index;
1916 bss_info_changed |= BSS_CHANGED_P2P_PS;
1922 /* just to be sure */
1923 ieee80211_stop_poll(sdata);
1925 ieee80211_led_assoc(local, 1);
1927 if (sdata->u.mgd.have_beacon) {
1929 * If the AP is buggy we may get here with no DTIM period
1930 * known, so assume it's 1 which is the only safe assumption
1931 * in that case, although if the TIM IE is broken powersave
1932 * probably just won't work at all.
1934 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1935 bss_conf->beacon_rate = bss->beacon_rate;
1936 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1938 bss_conf->beacon_rate = NULL;
1939 bss_conf->dtim_period = 0;
1942 bss_conf->assoc = 1;
1944 /* Tell the driver to monitor connection quality (if supported) */
1945 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1946 bss_conf->cqm_rssi_thold)
1947 bss_info_changed |= BSS_CHANGED_CQM;
1949 /* Enable ARP filtering */
1950 if (bss_conf->arp_addr_cnt)
1951 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1953 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1955 mutex_lock(&local->iflist_mtx);
1956 ieee80211_recalc_ps(local, -1);
1957 mutex_unlock(&local->iflist_mtx);
1959 ieee80211_recalc_smps(sdata);
1960 ieee80211_recalc_ps_vif(sdata);
1962 netif_carrier_on(sdata->dev);
1965 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1966 u16 stype, u16 reason, bool tx,
1969 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1970 struct ieee80211_local *local = sdata->local;
1973 sdata_assert_lock(sdata);
1975 if (WARN_ON_ONCE(tx && !frame_buf))
1978 if (WARN_ON(!ifmgd->associated))
1981 ieee80211_stop_poll(sdata);
1983 ifmgd->associated = NULL;
1984 netif_carrier_off(sdata->dev);
1987 * if we want to get out of ps before disassoc (why?) we have
1988 * to do it before sending disassoc, as otherwise the null-packet
1991 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1992 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1993 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1995 local->ps_sdata = NULL;
1997 /* disable per-vif ps */
1998 ieee80211_recalc_ps_vif(sdata);
2000 /* make sure ongoing transmission finishes */
2004 * drop any frame before deauth/disassoc, this can be data or
2005 * management frame. Since we are disconnecting, we should not
2006 * insist sending these frames which can take time and delay
2007 * the disconnection and possible the roaming.
2010 ieee80211_flush_queues(local, sdata, true);
2012 /* deauthenticate/disassociate now */
2013 if (tx || frame_buf)
2014 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2015 reason, tx, frame_buf);
2017 /* flush out frame - make sure the deauth was actually sent */
2019 ieee80211_flush_queues(local, sdata, false);
2021 /* clear bssid only after building the needed mgmt frames */
2022 memset(ifmgd->bssid, 0, ETH_ALEN);
2024 /* remove AP and TDLS peers */
2025 sta_info_flush(sdata);
2027 /* finally reset all BSS / config parameters */
2028 changed |= ieee80211_reset_erp_info(sdata);
2030 ieee80211_led_assoc(local, 0);
2031 changed |= BSS_CHANGED_ASSOC;
2032 sdata->vif.bss_conf.assoc = false;
2034 ifmgd->p2p_noa_index = -1;
2035 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2036 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2038 /* on the next assoc, re-program HT/VHT parameters */
2039 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2040 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2041 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2042 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2044 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2046 del_timer_sync(&local->dynamic_ps_timer);
2047 cancel_work_sync(&local->dynamic_ps_enable_work);
2049 /* Disable ARP filtering */
2050 if (sdata->vif.bss_conf.arp_addr_cnt)
2051 changed |= BSS_CHANGED_ARP_FILTER;
2053 sdata->vif.bss_conf.qos = false;
2054 changed |= BSS_CHANGED_QOS;
2056 /* The BSSID (not really interesting) and HT changed */
2057 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2058 ieee80211_bss_info_change_notify(sdata, changed);
2060 /* disassociated - set to defaults now */
2061 ieee80211_set_wmm_default(sdata, false);
2063 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2064 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2065 del_timer_sync(&sdata->u.mgd.timer);
2066 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2068 sdata->vif.bss_conf.dtim_period = 0;
2069 sdata->vif.bss_conf.beacon_rate = NULL;
2071 ifmgd->have_beacon = false;
2074 mutex_lock(&local->mtx);
2075 ieee80211_vif_release_channel(sdata);
2077 sdata->vif.csa_active = false;
2078 ifmgd->csa_waiting_bcn = false;
2079 if (sdata->csa_block_tx) {
2080 ieee80211_wake_vif_queues(local, sdata,
2081 IEEE80211_QUEUE_STOP_REASON_CSA);
2082 sdata->csa_block_tx = false;
2084 mutex_unlock(&local->mtx);
2086 /* existing TX TSPEC sessions no longer exist */
2087 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2088 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2090 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2093 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2094 struct ieee80211_hdr *hdr)
2097 * We can postpone the mgd.timer whenever receiving unicast frames
2098 * from AP because we know that the connection is working both ways
2099 * at that time. But multicast frames (and hence also beacons) must
2100 * be ignored here, because we need to trigger the timer during
2101 * data idle periods for sending the periodic probe request to the
2102 * AP we're connected to.
2104 if (is_multicast_ether_addr(hdr->addr1))
2107 ieee80211_sta_reset_conn_monitor(sdata);
2110 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2112 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2113 struct ieee80211_local *local = sdata->local;
2115 mutex_lock(&local->mtx);
2116 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2119 __ieee80211_stop_poll(sdata);
2121 mutex_lock(&local->iflist_mtx);
2122 ieee80211_recalc_ps(local, -1);
2123 mutex_unlock(&local->iflist_mtx);
2125 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2129 * We've received a probe response, but are not sure whether
2130 * we have or will be receiving any beacons or data, so let's
2131 * schedule the timers again, just in case.
2133 ieee80211_sta_reset_beacon_monitor(sdata);
2135 mod_timer(&ifmgd->conn_mon_timer,
2136 round_jiffies_up(jiffies +
2137 IEEE80211_CONNECTION_IDLE_TIME));
2139 mutex_unlock(&local->mtx);
2142 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2143 struct ieee80211_hdr *hdr,
2146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2147 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2148 int ac = ieee80211_ac_from_tid(tid);
2149 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2150 unsigned long now = jiffies;
2152 if (likely(!tx_tspec->admitted_time))
2155 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2156 tx_tspec->consumed_tx_time = 0;
2157 tx_tspec->time_slice_start = now;
2159 if (tx_tspec->downgraded) {
2160 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2161 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2165 if (tx_tspec->downgraded)
2168 tx_tspec->consumed_tx_time += tx_time;
2170 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2171 tx_tspec->downgraded = true;
2172 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2173 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2177 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2178 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2180 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2182 if (!ieee80211_is_data(hdr->frame_control))
2185 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2186 sdata->u.mgd.probe_send_count > 0) {
2188 ieee80211_sta_reset_conn_monitor(sdata);
2190 sdata->u.mgd.nullfunc_failed = true;
2191 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2196 ieee80211_sta_reset_conn_monitor(sdata);
2199 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2203 u8 *dst = ifmgd->associated->bssid;
2204 u8 unicast_limit = max(1, max_probe_tries - 3);
2207 * Try sending broadcast probe requests for the last three
2208 * probe requests after the first ones failed since some
2209 * buggy APs only support broadcast probe requests.
2211 if (ifmgd->probe_send_count >= unicast_limit)
2215 * When the hardware reports an accurate Tx ACK status, it's
2216 * better to send a nullfunc frame instead of a probe request,
2217 * as it will kick us off the AP quickly if we aren't associated
2218 * anymore. The timeout will be reset if the frame is ACKed by
2221 ifmgd->probe_send_count++;
2223 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2224 ifmgd->nullfunc_failed = false;
2225 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2230 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2231 if (WARN_ON_ONCE(ssid == NULL))
2236 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
2237 ssid + 2, ssid_len, NULL,
2238 0, (u32) -1, true, 0,
2239 ifmgd->associated->channel, false);
2243 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2244 run_again(sdata, ifmgd->probe_timeout);
2247 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2250 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2251 bool already = false;
2253 if (!ieee80211_sdata_running(sdata))
2258 if (!ifmgd->associated)
2261 mutex_lock(&sdata->local->mtx);
2263 if (sdata->local->tmp_channel || sdata->local->scanning) {
2264 mutex_unlock(&sdata->local->mtx);
2269 mlme_dbg_ratelimited(sdata,
2270 "detected beacon loss from AP (missed %d beacons) - probing\n",
2273 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2277 * The driver/our work has already reported this event or the
2278 * connection monitoring has kicked in and we have already sent
2279 * a probe request. Or maybe the AP died and the driver keeps
2280 * reporting until we disassociate...
2282 * In either case we have to ignore the current call to this
2283 * function (except for setting the correct probe reason bit)
2284 * because otherwise we would reset the timer every time and
2285 * never check whether we received a probe response!
2287 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2290 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2292 mutex_unlock(&sdata->local->mtx);
2297 mutex_lock(&sdata->local->iflist_mtx);
2298 ieee80211_recalc_ps(sdata->local, -1);
2299 mutex_unlock(&sdata->local->iflist_mtx);
2301 ifmgd->probe_send_count = 0;
2302 ieee80211_mgd_probe_ap_send(sdata);
2304 sdata_unlock(sdata);
2307 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2308 struct ieee80211_vif *vif)
2310 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2312 struct cfg80211_bss *cbss;
2313 struct sk_buff *skb;
2317 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2320 sdata_assert_lock(sdata);
2322 if (ifmgd->associated)
2323 cbss = ifmgd->associated;
2324 else if (ifmgd->auth_data)
2325 cbss = ifmgd->auth_data->bss;
2326 else if (ifmgd->assoc_data)
2327 cbss = ifmgd->assoc_data->bss;
2332 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2333 if (WARN_ON_ONCE(ssid == NULL))
2338 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2339 (u32) -1, cbss->channel,
2346 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2348 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2350 struct ieee80211_local *local = sdata->local;
2351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2352 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2355 if (!ifmgd->associated) {
2356 sdata_unlock(sdata);
2360 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2361 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2363 mutex_lock(&local->mtx);
2364 sdata->vif.csa_active = false;
2365 ifmgd->csa_waiting_bcn = false;
2366 if (sdata->csa_block_tx) {
2367 ieee80211_wake_vif_queues(local, sdata,
2368 IEEE80211_QUEUE_STOP_REASON_CSA);
2369 sdata->csa_block_tx = false;
2371 mutex_unlock(&local->mtx);
2373 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2374 IEEE80211_DEAUTH_FRAME_LEN);
2375 sdata_unlock(sdata);
2378 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2380 struct ieee80211_sub_if_data *sdata =
2381 container_of(work, struct ieee80211_sub_if_data,
2382 u.mgd.beacon_connection_loss_work);
2383 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2384 struct sta_info *sta;
2386 if (ifmgd->associated) {
2388 sta = sta_info_get(sdata, ifmgd->bssid);
2390 sta->beacon_loss_count++;
2394 if (ifmgd->connection_loss) {
2395 sdata_info(sdata, "Connection to AP %pM lost\n",
2397 __ieee80211_disconnect(sdata);
2399 ieee80211_mgd_probe_ap(sdata, true);
2403 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2405 struct ieee80211_sub_if_data *sdata =
2406 container_of(work, struct ieee80211_sub_if_data,
2407 u.mgd.csa_connection_drop_work);
2409 __ieee80211_disconnect(sdata);
2412 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2414 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2415 struct ieee80211_hw *hw = &sdata->local->hw;
2417 trace_api_beacon_loss(sdata);
2419 sdata->u.mgd.connection_loss = false;
2420 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2422 EXPORT_SYMBOL(ieee80211_beacon_loss);
2424 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2426 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2427 struct ieee80211_hw *hw = &sdata->local->hw;
2429 trace_api_connection_loss(sdata);
2431 sdata->u.mgd.connection_loss = true;
2432 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2434 EXPORT_SYMBOL(ieee80211_connection_loss);
2437 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2440 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2442 sdata_assert_lock(sdata);
2446 * we are not authenticated yet, the only timer that could be
2447 * running is the timeout for the authentication response which
2448 * which is not relevant anymore.
2450 del_timer_sync(&sdata->u.mgd.timer);
2451 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2453 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2454 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2455 sdata->u.mgd.flags = 0;
2456 mutex_lock(&sdata->local->mtx);
2457 ieee80211_vif_release_channel(sdata);
2458 mutex_unlock(&sdata->local->mtx);
2461 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2463 sdata->u.mgd.auth_data = NULL;
2466 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2467 struct ieee80211_mgmt *mgmt, size_t len)
2469 struct ieee80211_local *local = sdata->local;
2470 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2472 struct ieee802_11_elems elems;
2475 pos = mgmt->u.auth.variable;
2476 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2477 if (!elems.challenge)
2479 auth_data->expected_transaction = 4;
2480 drv_mgd_prepare_tx(sdata->local, sdata);
2481 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2482 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2483 IEEE80211_TX_INTFL_MLME_CONN_TX;
2484 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2485 elems.challenge - 2, elems.challenge_len + 2,
2486 auth_data->bss->bssid, auth_data->bss->bssid,
2487 auth_data->key, auth_data->key_len,
2488 auth_data->key_idx, tx_flags);
2491 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2492 struct ieee80211_mgmt *mgmt, size_t len)
2494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2496 u16 auth_alg, auth_transaction, status_code;
2497 struct sta_info *sta;
2499 sdata_assert_lock(sdata);
2504 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2507 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2509 if (!ether_addr_equal(bssid, mgmt->bssid))
2512 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2513 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2514 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2516 if (auth_alg != ifmgd->auth_data->algorithm ||
2517 auth_transaction != ifmgd->auth_data->expected_transaction) {
2518 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2519 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2521 ifmgd->auth_data->expected_transaction);
2525 if (status_code != WLAN_STATUS_SUCCESS) {
2526 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2527 mgmt->sa, status_code);
2528 ieee80211_destroy_auth_data(sdata, false);
2529 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2533 switch (ifmgd->auth_data->algorithm) {
2534 case WLAN_AUTH_OPEN:
2535 case WLAN_AUTH_LEAP:
2539 case WLAN_AUTH_SHARED_KEY:
2540 if (ifmgd->auth_data->expected_transaction != 4) {
2541 ieee80211_auth_challenge(sdata, mgmt, len);
2542 /* need another frame */
2547 WARN_ONCE(1, "invalid auth alg %d",
2548 ifmgd->auth_data->algorithm);
2552 sdata_info(sdata, "authenticated\n");
2553 ifmgd->auth_data->done = true;
2554 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2555 ifmgd->auth_data->timeout_started = true;
2556 run_again(sdata, ifmgd->auth_data->timeout);
2558 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2559 ifmgd->auth_data->expected_transaction != 2) {
2561 * Report auth frame to user space for processing since another
2562 * round of Authentication frames is still needed.
2564 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2568 /* move station state to auth */
2569 mutex_lock(&sdata->local->sta_mtx);
2570 sta = sta_info_get(sdata, bssid);
2572 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2575 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2576 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2579 mutex_unlock(&sdata->local->sta_mtx);
2581 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2584 mutex_unlock(&sdata->local->sta_mtx);
2585 /* ignore frame -- wait for timeout */
2588 #define case_WLAN(type) \
2589 case WLAN_REASON_##type: return #type
2591 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2593 switch (reason_code) {
2594 case_WLAN(UNSPECIFIED);
2595 case_WLAN(PREV_AUTH_NOT_VALID);
2596 case_WLAN(DEAUTH_LEAVING);
2597 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2598 case_WLAN(DISASSOC_AP_BUSY);
2599 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2600 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2601 case_WLAN(DISASSOC_STA_HAS_LEFT);
2602 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2603 case_WLAN(DISASSOC_BAD_POWER);
2604 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2605 case_WLAN(INVALID_IE);
2606 case_WLAN(MIC_FAILURE);
2607 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2608 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2609 case_WLAN(IE_DIFFERENT);
2610 case_WLAN(INVALID_GROUP_CIPHER);
2611 case_WLAN(INVALID_PAIRWISE_CIPHER);
2612 case_WLAN(INVALID_AKMP);
2613 case_WLAN(UNSUPP_RSN_VERSION);
2614 case_WLAN(INVALID_RSN_IE_CAP);
2615 case_WLAN(IEEE8021X_FAILED);
2616 case_WLAN(CIPHER_SUITE_REJECTED);
2617 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2618 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2619 case_WLAN(DISASSOC_LOW_ACK);
2620 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2621 case_WLAN(QSTA_LEAVE_QBSS);
2622 case_WLAN(QSTA_NOT_USE);
2623 case_WLAN(QSTA_REQUIRE_SETUP);
2624 case_WLAN(QSTA_TIMEOUT);
2625 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2626 case_WLAN(MESH_PEER_CANCELED);
2627 case_WLAN(MESH_MAX_PEERS);
2628 case_WLAN(MESH_CONFIG);
2629 case_WLAN(MESH_CLOSE);
2630 case_WLAN(MESH_MAX_RETRIES);
2631 case_WLAN(MESH_CONFIRM_TIMEOUT);
2632 case_WLAN(MESH_INVALID_GTK);
2633 case_WLAN(MESH_INCONSISTENT_PARAM);
2634 case_WLAN(MESH_INVALID_SECURITY);
2635 case_WLAN(MESH_PATH_ERROR);
2636 case_WLAN(MESH_PATH_NOFORWARD);
2637 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2638 case_WLAN(MAC_EXISTS_IN_MBSS);
2639 case_WLAN(MESH_CHAN_REGULATORY);
2640 case_WLAN(MESH_CHAN);
2641 default: return "<unknown>";
2645 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2646 struct ieee80211_mgmt *mgmt, size_t len)
2648 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2649 const u8 *bssid = NULL;
2652 sdata_assert_lock(sdata);
2657 if (!ifmgd->associated ||
2658 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2661 bssid = ifmgd->associated->bssid;
2663 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2665 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2666 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2668 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2670 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2674 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2675 struct ieee80211_mgmt *mgmt, size_t len)
2677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2680 sdata_assert_lock(sdata);
2685 if (!ifmgd->associated ||
2686 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2689 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2691 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2692 mgmt->sa, reason_code);
2694 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2696 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2699 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2700 u8 *supp_rates, unsigned int supp_rates_len,
2701 u32 *rates, u32 *basic_rates,
2702 bool *have_higher_than_11mbit,
2703 int *min_rate, int *min_rate_index,
2704 int shift, u32 rate_flags)
2708 for (i = 0; i < supp_rates_len; i++) {
2709 int rate = supp_rates[i] & 0x7f;
2710 bool is_basic = !!(supp_rates[i] & 0x80);
2712 if ((rate * 5 * (1 << shift)) > 110)
2713 *have_higher_than_11mbit = true;
2716 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2717 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2719 * Note: Even through the membership selector and the basic
2720 * rate flag share the same bit, they are not exactly
2723 if (!!(supp_rates[i] & 0x80) &&
2724 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2727 for (j = 0; j < sband->n_bitrates; j++) {
2728 struct ieee80211_rate *br;
2731 br = &sband->bitrates[j];
2732 if ((rate_flags & br->flags) != rate_flags)
2735 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2736 if (brate == rate) {
2739 *basic_rates |= BIT(j);
2740 if ((rate * 5) < *min_rate) {
2741 *min_rate = rate * 5;
2742 *min_rate_index = j;
2750 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2753 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2755 sdata_assert_lock(sdata);
2759 * we are not associated yet, the only timer that could be
2760 * running is the timeout for the association response which
2761 * which is not relevant anymore.
2763 del_timer_sync(&sdata->u.mgd.timer);
2764 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2766 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2767 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2768 sdata->u.mgd.flags = 0;
2769 mutex_lock(&sdata->local->mtx);
2770 ieee80211_vif_release_channel(sdata);
2771 mutex_unlock(&sdata->local->mtx);
2775 sdata->u.mgd.assoc_data = NULL;
2778 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2779 struct cfg80211_bss *cbss,
2780 struct ieee80211_mgmt *mgmt, size_t len)
2782 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2783 struct ieee80211_local *local = sdata->local;
2784 struct ieee80211_supported_band *sband;
2785 struct sta_info *sta;
2787 u16 capab_info, aid;
2788 struct ieee802_11_elems elems;
2789 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2790 const struct cfg80211_bss_ies *bss_ies = NULL;
2791 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2796 /* AssocResp and ReassocResp have identical structure */
2798 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2799 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2801 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2802 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2804 aid &= ~(BIT(15) | BIT(14));
2806 ifmgd->broken_ap = false;
2808 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2809 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2812 ifmgd->broken_ap = true;
2815 pos = mgmt->u.assoc_resp.variable;
2816 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2818 if (!elems.supp_rates) {
2819 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2824 ifmgd->tdls_chan_switch_prohibited =
2825 elems.ext_capab && elems.ext_capab_len >= 5 &&
2826 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2829 * Some APs are erroneously not including some information in their
2830 * (re)association response frames. Try to recover by using the data
2831 * from the beacon or probe response. This seems to afflict mobile
2832 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2833 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2835 if ((assoc_data->wmm && !elems.wmm_param) ||
2836 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2837 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2838 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2839 (!elems.vht_cap_elem || !elems.vht_operation))) {
2840 const struct cfg80211_bss_ies *ies;
2841 struct ieee802_11_elems bss_elems;
2844 ies = rcu_dereference(cbss->ies);
2846 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2852 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2854 if (assoc_data->wmm &&
2855 !elems.wmm_param && bss_elems.wmm_param) {
2856 elems.wmm_param = bss_elems.wmm_param;
2858 "AP bug: WMM param missing from AssocResp\n");
2862 * Also check if we requested HT/VHT, otherwise the AP doesn't
2863 * have to include the IEs in the (re)association response.
2865 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2866 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2867 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2869 "AP bug: HT capability missing from AssocResp\n");
2871 if (!elems.ht_operation && bss_elems.ht_operation &&
2872 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2873 elems.ht_operation = bss_elems.ht_operation;
2875 "AP bug: HT operation missing from AssocResp\n");
2877 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2878 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2879 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2881 "AP bug: VHT capa missing from AssocResp\n");
2883 if (!elems.vht_operation && bss_elems.vht_operation &&
2884 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2885 elems.vht_operation = bss_elems.vht_operation;
2887 "AP bug: VHT operation missing from AssocResp\n");
2892 * We previously checked these in the beacon/probe response, so
2893 * they should be present here. This is just a safety net.
2895 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2896 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2898 "HT AP is missing WMM params or HT capability/operation\n");
2903 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2904 (!elems.vht_cap_elem || !elems.vht_operation)) {
2906 "VHT AP is missing VHT capability/operation\n");
2911 mutex_lock(&sdata->local->sta_mtx);
2913 * station info was already allocated and inserted before
2914 * the association and should be available to us
2916 sta = sta_info_get(sdata, cbss->bssid);
2917 if (WARN_ON(!sta)) {
2918 mutex_unlock(&sdata->local->sta_mtx);
2923 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2925 /* Set up internal HT/VHT capabilities */
2926 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2927 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2928 elems.ht_cap_elem, sta);
2930 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2931 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2932 elems.vht_cap_elem, sta);
2935 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2936 * in their association response, so ignore that data for our own
2937 * configuration. If it changed since the last beacon, we'll get the
2938 * next beacon and update then.
2942 * If an operating mode notification IE is present, override the
2943 * NSS calculation (that would be done in rate_control_rate_init())
2944 * and use the # of streams from that element.
2946 if (elems.opmode_notif &&
2947 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2950 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2951 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2953 sta->sta.rx_nss = nss;
2956 rate_control_rate_init(sta);
2958 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
2959 set_sta_flag(sta, WLAN_STA_MFP);
2960 sta->sta.mfp = true;
2962 sta->sta.mfp = false;
2965 sta->sta.wme = elems.wmm_param;
2967 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2968 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2969 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2972 "failed to move station %pM to desired state\n",
2974 WARN_ON(__sta_info_destroy(sta));
2975 mutex_unlock(&sdata->local->sta_mtx);
2980 mutex_unlock(&sdata->local->sta_mtx);
2983 * Always handle WMM once after association regardless
2984 * of the first value the AP uses. Setting -1 here has
2985 * that effect because the AP values is an unsigned
2988 ifmgd->wmm_last_param_set = -1;
2990 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2991 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2992 elems.wmm_param_len);
2994 ieee80211_set_wmm_default(sdata, false);
2995 changed |= BSS_CHANGED_QOS;
2997 /* set AID and assoc capability,
2998 * ieee80211_set_associated() will tell the driver */
2999 bss_conf->aid = aid;
3000 bss_conf->assoc_capability = capab_info;
3001 ieee80211_set_associated(sdata, cbss, changed);
3004 * If we're using 4-addr mode, let the AP know that we're
3005 * doing so, so that it can create the STA VLAN on its side
3007 if (ifmgd->use_4addr)
3008 ieee80211_send_4addr_nullfunc(local, sdata);
3011 * Start timer to probe the connection to the AP now.
3012 * Also start the timer that will detect beacon loss.
3014 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3015 ieee80211_sta_reset_beacon_monitor(sdata);
3023 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3024 struct ieee80211_mgmt *mgmt,
3027 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3028 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3029 u16 capab_info, status_code, aid;
3030 struct ieee802_11_elems elems;
3031 int ac, uapsd_queues = -1;
3034 struct cfg80211_bss *bss;
3036 sdata_assert_lock(sdata);
3040 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3044 * AssocResp and ReassocResp have identical structure, so process both
3045 * of them in this function.
3051 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3052 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3053 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3054 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3057 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3058 reassoc ? "Rea" : "A", mgmt->sa,
3059 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3061 pos = mgmt->u.assoc_resp.variable;
3062 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3064 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3065 elems.timeout_int &&
3066 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3068 tu = le32_to_cpu(elems.timeout_int->value);
3069 ms = tu * 1024 / 1000;
3071 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3073 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3074 assoc_data->timeout_started = true;
3075 if (ms > IEEE80211_ASSOC_TIMEOUT)
3076 run_again(sdata, assoc_data->timeout);
3080 bss = assoc_data->bss;
3082 if (status_code != WLAN_STATUS_SUCCESS) {
3083 sdata_info(sdata, "%pM denied association (code=%d)\n",
3084 mgmt->sa, status_code);
3085 ieee80211_destroy_assoc_data(sdata, false);
3087 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3088 /* oops -- internal error -- send timeout for now */
3089 ieee80211_destroy_assoc_data(sdata, false);
3090 cfg80211_assoc_timeout(sdata->dev, bss);
3093 sdata_info(sdata, "associated\n");
3096 * destroy assoc_data afterwards, as otherwise an idle
3097 * recalc after assoc_data is NULL but before associated
3098 * is set can cause the interface to go idle
3100 ieee80211_destroy_assoc_data(sdata, true);
3102 /* get uapsd queues configuration */
3104 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3105 if (sdata->tx_conf[ac].uapsd)
3106 uapsd_queues |= BIT(ac);
3109 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3112 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3113 struct ieee80211_mgmt *mgmt, size_t len,
3114 struct ieee80211_rx_status *rx_status,
3115 struct ieee802_11_elems *elems)
3117 struct ieee80211_local *local = sdata->local;
3118 struct ieee80211_bss *bss;
3119 struct ieee80211_channel *channel;
3121 sdata_assert_lock(sdata);
3123 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3127 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3130 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3131 ieee80211_rx_bss_put(local, bss);
3136 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3137 struct sk_buff *skb)
3139 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3140 struct ieee80211_if_managed *ifmgd;
3141 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3142 size_t baselen, len = skb->len;
3143 struct ieee802_11_elems elems;
3145 ifmgd = &sdata->u.mgd;
3147 sdata_assert_lock(sdata);
3149 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3150 return; /* ignore ProbeResp to foreign address */
3152 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3156 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3159 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3161 if (ifmgd->associated &&
3162 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3163 ieee80211_reset_ap_probe(sdata);
3165 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3166 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3167 /* got probe response, continue with auth */
3168 sdata_info(sdata, "direct probe responded\n");
3169 ifmgd->auth_data->tries = 0;
3170 ifmgd->auth_data->timeout = jiffies;
3171 ifmgd->auth_data->timeout_started = true;
3172 run_again(sdata, ifmgd->auth_data->timeout);
3177 * This is the canonical list of information elements we care about,
3178 * the filter code also gives us all changes to the Microsoft OUI
3179 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3180 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3181 * changes to requested client power.
3183 * We implement beacon filtering in software since that means we can
3184 * avoid processing the frame here and in cfg80211, and userspace
3185 * will not be able to tell whether the hardware supports it or not.
3187 * XXX: This list needs to be dynamic -- userspace needs to be able to
3188 * add items it requires. It also needs to be able to tell us to
3189 * look out for other vendor IEs.
3191 static const u64 care_about_ies =
3192 (1ULL << WLAN_EID_COUNTRY) |
3193 (1ULL << WLAN_EID_ERP_INFO) |
3194 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3195 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3196 (1ULL << WLAN_EID_HT_CAPABILITY) |
3197 (1ULL << WLAN_EID_HT_OPERATION);
3199 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3200 struct ieee80211_mgmt *mgmt, size_t len,
3201 struct ieee80211_rx_status *rx_status)
3203 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3204 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3206 struct ieee802_11_elems elems;
3207 struct ieee80211_local *local = sdata->local;
3208 struct ieee80211_chanctx_conf *chanctx_conf;
3209 struct ieee80211_channel *chan;
3210 struct sta_info *sta;
3216 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3218 sdata_assert_lock(sdata);
3220 /* Process beacon from the current BSS */
3221 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3226 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3227 if (!chanctx_conf) {
3232 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3236 chan = chanctx_conf->def.chan;
3239 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3240 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3241 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3242 len - baselen, false, &elems);
3244 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3245 if (elems.tim && !elems.parse_error) {
3246 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3247 ifmgd->dtim_period = tim_ie->dtim_period;
3249 ifmgd->have_beacon = true;
3250 ifmgd->assoc_data->need_beacon = false;
3251 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3252 sdata->vif.bss_conf.sync_tsf =
3253 le64_to_cpu(mgmt->u.beacon.timestamp);
3254 sdata->vif.bss_conf.sync_device_ts =
3255 rx_status->device_timestamp;
3257 sdata->vif.bss_conf.sync_dtim_count =
3258 elems.tim->dtim_count;
3260 sdata->vif.bss_conf.sync_dtim_count = 0;
3262 /* continue assoc process */
3263 ifmgd->assoc_data->timeout = jiffies;
3264 ifmgd->assoc_data->timeout_started = true;
3265 run_again(sdata, ifmgd->assoc_data->timeout);
3269 if (!ifmgd->associated ||
3270 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3272 bssid = ifmgd->associated->bssid;
3274 /* Track average RSSI from the Beacon frames of the current AP */
3275 ifmgd->last_beacon_signal = rx_status->signal;
3276 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3277 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3278 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3279 ifmgd->last_cqm_event_signal = 0;
3280 ifmgd->count_beacon_signal = 1;
3281 ifmgd->last_ave_beacon_signal = 0;
3283 ifmgd->ave_beacon_signal =
3284 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3285 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3286 ifmgd->ave_beacon_signal) / 16;
3287 ifmgd->count_beacon_signal++;
3290 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3291 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3292 int sig = ifmgd->ave_beacon_signal;
3293 int last_sig = ifmgd->last_ave_beacon_signal;
3296 * if signal crosses either of the boundaries, invoke callback
3297 * with appropriate parameters
3299 if (sig > ifmgd->rssi_max_thold &&
3300 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3301 ifmgd->last_ave_beacon_signal = sig;
3302 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3303 } else if (sig < ifmgd->rssi_min_thold &&
3304 (last_sig >= ifmgd->rssi_max_thold ||
3306 ifmgd->last_ave_beacon_signal = sig;
3307 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3311 if (bss_conf->cqm_rssi_thold &&
3312 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3313 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3314 int sig = ifmgd->ave_beacon_signal / 16;
3315 int last_event = ifmgd->last_cqm_event_signal;
3316 int thold = bss_conf->cqm_rssi_thold;
3317 int hyst = bss_conf->cqm_rssi_hyst;
3319 (last_event == 0 || sig < last_event - hyst)) {
3320 ifmgd->last_cqm_event_signal = sig;
3321 ieee80211_cqm_rssi_notify(
3323 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3325 } else if (sig > thold &&
3326 (last_event == 0 || sig > last_event + hyst)) {
3327 ifmgd->last_cqm_event_signal = sig;
3328 ieee80211_cqm_rssi_notify(
3330 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3335 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3336 mlme_dbg_ratelimited(sdata,
3337 "cancelling AP probe due to a received beacon\n");
3338 ieee80211_reset_ap_probe(sdata);
3342 * Push the beacon loss detection into the future since
3343 * we are processing a beacon from the AP just now.
3345 ieee80211_sta_reset_beacon_monitor(sdata);
3347 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3348 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3349 len - baselen, false, &elems,
3350 care_about_ies, ncrc);
3352 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3353 bool directed_tim = ieee80211_check_tim(elems.tim,
3357 if (local->hw.conf.dynamic_ps_timeout > 0) {
3358 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3359 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3360 ieee80211_hw_config(local,
3361 IEEE80211_CONF_CHANGE_PS);
3363 ieee80211_send_nullfunc(local, sdata, 0);
3364 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3365 local->pspolling = true;
3368 * Here is assumed that the driver will be
3369 * able to send ps-poll frame and receive a
3370 * response even though power save mode is
3371 * enabled, but some drivers might require
3372 * to disable power save here. This needs
3373 * to be investigated.
3375 ieee80211_send_pspoll(local, sdata);
3380 if (sdata->vif.p2p) {
3381 struct ieee80211_p2p_noa_attr noa = {};
3384 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3386 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3387 (u8 *) &noa, sizeof(noa));
3389 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3390 /* valid noa_attr and index changed */
3391 sdata->u.mgd.p2p_noa_index = noa.index;
3392 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3393 changed |= BSS_CHANGED_P2P_PS;
3395 * make sure we update all information, the CRC
3396 * mechanism doesn't look at P2P attributes.
3398 ifmgd->beacon_crc_valid = false;
3400 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3401 /* noa_attr not found and we had valid noa_attr before */
3402 sdata->u.mgd.p2p_noa_index = -1;
3403 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3404 changed |= BSS_CHANGED_P2P_PS;
3405 ifmgd->beacon_crc_valid = false;
3409 if (ifmgd->csa_waiting_bcn)
3410 ieee80211_chswitch_post_beacon(sdata);
3413 * Update beacon timing and dtim count on every beacon appearance. This
3414 * will allow the driver to use the most updated values. Do it before
3415 * comparing this one with last received beacon.
3416 * IMPORTANT: These parameters would possibly be out of sync by the time
3417 * the driver will use them. The synchronized view is currently
3418 * guaranteed only in certain callbacks.
3420 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3421 sdata->vif.bss_conf.sync_tsf =
3422 le64_to_cpu(mgmt->u.beacon.timestamp);
3423 sdata->vif.bss_conf.sync_device_ts =
3424 rx_status->device_timestamp;
3426 sdata->vif.bss_conf.sync_dtim_count =
3427 elems.tim->dtim_count;
3429 sdata->vif.bss_conf.sync_dtim_count = 0;
3432 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3434 ifmgd->beacon_crc = ncrc;
3435 ifmgd->beacon_crc_valid = true;
3437 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3439 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3440 rx_status->device_timestamp,
3443 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3444 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3445 elems.wmm_param_len))
3446 changed |= BSS_CHANGED_QOS;
3449 * If we haven't had a beacon before, tell the driver about the
3450 * DTIM period (and beacon timing if desired) now.
3452 if (!ifmgd->have_beacon) {
3453 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3455 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3457 bss_conf->dtim_period = 1;
3459 changed |= BSS_CHANGED_BEACON_INFO;
3460 ifmgd->have_beacon = true;
3462 mutex_lock(&local->iflist_mtx);
3463 ieee80211_recalc_ps(local, -1);
3464 mutex_unlock(&local->iflist_mtx);
3466 ieee80211_recalc_ps_vif(sdata);
3469 if (elems.erp_info) {
3471 erp_value = elems.erp_info[0];
3475 changed |= ieee80211_handle_bss_capability(sdata,
3476 le16_to_cpu(mgmt->u.beacon.capab_info),
3477 erp_valid, erp_value);
3479 mutex_lock(&local->sta_mtx);
3480 sta = sta_info_get(sdata, bssid);
3482 if (ieee80211_config_bw(sdata, sta,
3483 elems.ht_cap_elem, elems.ht_operation,
3484 elems.vht_operation, bssid, &changed)) {
3485 mutex_unlock(&local->sta_mtx);
3486 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3487 WLAN_REASON_DEAUTH_LEAVING,
3489 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3490 sizeof(deauth_buf));
3494 if (sta && elems.opmode_notif)
3495 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3496 rx_status->band, true);
3497 mutex_unlock(&local->sta_mtx);
3499 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3501 elems.country_elem_len,
3502 elems.pwr_constr_elem,
3503 elems.cisco_dtpc_elem);
3505 ieee80211_bss_info_change_notify(sdata, changed);
3508 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3509 struct sk_buff *skb)
3511 struct ieee80211_rx_status *rx_status;
3512 struct ieee80211_mgmt *mgmt;
3514 struct ieee802_11_elems elems;
3517 rx_status = (struct ieee80211_rx_status *) skb->cb;
3518 mgmt = (struct ieee80211_mgmt *) skb->data;
3519 fc = le16_to_cpu(mgmt->frame_control);
3523 switch (fc & IEEE80211_FCTL_STYPE) {
3524 case IEEE80211_STYPE_BEACON:
3525 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3527 case IEEE80211_STYPE_PROBE_RESP:
3528 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3530 case IEEE80211_STYPE_AUTH:
3531 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3533 case IEEE80211_STYPE_DEAUTH:
3534 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3536 case IEEE80211_STYPE_DISASSOC:
3537 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3539 case IEEE80211_STYPE_ASSOC_RESP:
3540 case IEEE80211_STYPE_REASSOC_RESP:
3541 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3543 case IEEE80211_STYPE_ACTION:
3544 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3545 ies_len = skb->len -
3546 offsetof(struct ieee80211_mgmt,
3547 u.action.u.chan_switch.variable);
3552 ieee802_11_parse_elems(
3553 mgmt->u.action.u.chan_switch.variable,
3554 ies_len, true, &elems);
3556 if (elems.parse_error)
3559 ieee80211_sta_process_chanswitch(sdata,
3561 rx_status->device_timestamp,
3563 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3564 ies_len = skb->len -
3565 offsetof(struct ieee80211_mgmt,
3566 u.action.u.ext_chan_switch.variable);
3571 ieee802_11_parse_elems(
3572 mgmt->u.action.u.ext_chan_switch.variable,
3573 ies_len, true, &elems);
3575 if (elems.parse_error)
3578 /* for the handling code pretend this was also an IE */
3579 elems.ext_chansw_ie =
3580 &mgmt->u.action.u.ext_chan_switch.data;
3582 ieee80211_sta_process_chanswitch(sdata,
3584 rx_status->device_timestamp,
3589 sdata_unlock(sdata);
3592 static void ieee80211_sta_timer(unsigned long data)
3594 struct ieee80211_sub_if_data *sdata =
3595 (struct ieee80211_sub_if_data *) data;
3597 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3600 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3601 u8 *bssid, u8 reason, bool tx)
3603 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3605 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3608 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3609 IEEE80211_DEAUTH_FRAME_LEN);
3612 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3614 struct ieee80211_local *local = sdata->local;
3615 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3616 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3619 sdata_assert_lock(sdata);
3621 if (WARN_ON_ONCE(!auth_data))
3626 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3627 sdata_info(sdata, "authentication with %pM timed out\n",
3628 auth_data->bss->bssid);
3631 * Most likely AP is not in the range so remove the
3632 * bss struct for that AP.
3634 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3639 drv_mgd_prepare_tx(local, sdata);
3641 if (auth_data->bss->proberesp_ies) {
3645 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3646 auth_data->bss->bssid, auth_data->tries,
3647 IEEE80211_AUTH_MAX_TRIES);
3649 auth_data->expected_transaction = 2;
3651 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3652 trans = auth_data->sae_trans;
3653 status = auth_data->sae_status;
3654 auth_data->expected_transaction = trans;
3657 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3658 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3659 IEEE80211_TX_INTFL_MLME_CONN_TX;
3661 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3662 auth_data->data, auth_data->data_len,
3663 auth_data->bss->bssid,
3664 auth_data->bss->bssid, NULL, 0, 0,
3669 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3670 auth_data->bss->bssid, auth_data->tries,
3671 IEEE80211_AUTH_MAX_TRIES);
3674 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3680 * Direct probe is sent to broadcast address as some APs
3681 * will not answer to direct packet in unassociated state.
3683 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3684 ssidie + 2, ssidie[1],
3685 NULL, 0, (u32) -1, true, 0,
3686 auth_data->bss->channel, false);
3690 if (tx_flags == 0) {
3691 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3692 auth_data->timeout_started = true;
3693 run_again(sdata, auth_data->timeout);
3695 auth_data->timeout =
3696 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3697 auth_data->timeout_started = true;
3698 run_again(sdata, auth_data->timeout);
3704 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3706 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3707 struct ieee80211_local *local = sdata->local;
3709 sdata_assert_lock(sdata);
3711 assoc_data->tries++;
3712 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3713 sdata_info(sdata, "association with %pM timed out\n",
3714 assoc_data->bss->bssid);
3717 * Most likely AP is not in the range so remove the
3718 * bss struct for that AP.
3720 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3725 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3726 assoc_data->bss->bssid, assoc_data->tries,
3727 IEEE80211_ASSOC_MAX_TRIES);
3728 ieee80211_send_assoc(sdata);
3730 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3731 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3732 assoc_data->timeout_started = true;
3733 run_again(sdata, assoc_data->timeout);
3735 assoc_data->timeout =
3736 round_jiffies_up(jiffies +
3737 IEEE80211_ASSOC_TIMEOUT_LONG);
3738 assoc_data->timeout_started = true;
3739 run_again(sdata, assoc_data->timeout);
3745 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3746 __le16 fc, bool acked)
3748 struct ieee80211_local *local = sdata->local;
3750 sdata->u.mgd.status_fc = fc;
3751 sdata->u.mgd.status_acked = acked;
3752 sdata->u.mgd.status_received = true;
3754 ieee80211_queue_work(&local->hw, &sdata->work);
3757 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3759 struct ieee80211_local *local = sdata->local;
3760 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3764 if (ifmgd->status_received) {
3765 __le16 fc = ifmgd->status_fc;
3766 bool status_acked = ifmgd->status_acked;
3768 ifmgd->status_received = false;
3769 if (ifmgd->auth_data &&
3770 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3772 ifmgd->auth_data->timeout =
3773 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3774 run_again(sdata, ifmgd->auth_data->timeout);
3776 ifmgd->auth_data->timeout = jiffies - 1;
3778 ifmgd->auth_data->timeout_started = true;
3779 } else if (ifmgd->assoc_data &&
3780 (ieee80211_is_assoc_req(fc) ||
3781 ieee80211_is_reassoc_req(fc))) {
3783 ifmgd->assoc_data->timeout =
3784 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3785 run_again(sdata, ifmgd->assoc_data->timeout);
3787 ifmgd->assoc_data->timeout = jiffies - 1;
3789 ifmgd->assoc_data->timeout_started = true;
3793 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3794 time_after(jiffies, ifmgd->auth_data->timeout)) {
3795 if (ifmgd->auth_data->done) {
3797 * ok ... we waited for assoc but userspace didn't,
3798 * so let's just kill the auth data
3800 ieee80211_destroy_auth_data(sdata, false);
3801 } else if (ieee80211_probe_auth(sdata)) {
3804 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3806 ieee80211_destroy_auth_data(sdata, false);
3808 cfg80211_auth_timeout(sdata->dev, bssid);
3810 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3811 run_again(sdata, ifmgd->auth_data->timeout);
3813 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3814 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3815 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3816 ieee80211_do_assoc(sdata)) {
3817 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3819 ieee80211_destroy_assoc_data(sdata, false);
3820 cfg80211_assoc_timeout(sdata->dev, bss);
3822 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3823 run_again(sdata, ifmgd->assoc_data->timeout);
3825 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3826 ifmgd->associated) {
3830 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3832 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3833 max_tries = max_nullfunc_tries;
3835 max_tries = max_probe_tries;
3837 /* ACK received for nullfunc probing frame */
3838 if (!ifmgd->probe_send_count)
3839 ieee80211_reset_ap_probe(sdata);
3840 else if (ifmgd->nullfunc_failed) {
3841 if (ifmgd->probe_send_count < max_tries) {
3843 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3844 bssid, ifmgd->probe_send_count,
3846 ieee80211_mgd_probe_ap_send(sdata);
3849 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3851 ieee80211_sta_connection_lost(sdata, bssid,
3852 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3855 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3856 run_again(sdata, ifmgd->probe_timeout);
3857 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3859 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3860 bssid, probe_wait_ms);
3861 ieee80211_sta_connection_lost(sdata, bssid,
3862 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3863 } else if (ifmgd->probe_send_count < max_tries) {
3865 "No probe response from AP %pM after %dms, try %d/%i\n",
3866 bssid, probe_wait_ms,
3867 ifmgd->probe_send_count, max_tries);
3868 ieee80211_mgd_probe_ap_send(sdata);
3871 * We actually lost the connection ... or did we?
3874 wiphy_debug(local->hw.wiphy,
3875 "%s: No probe response from AP %pM"
3876 " after %dms, disconnecting.\n",
3878 bssid, probe_wait_ms);
3880 ieee80211_sta_connection_lost(sdata, bssid,
3881 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3885 sdata_unlock(sdata);
3888 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3890 struct ieee80211_sub_if_data *sdata =
3891 (struct ieee80211_sub_if_data *) data;
3892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3894 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3897 sdata->u.mgd.connection_loss = false;
3898 ieee80211_queue_work(&sdata->local->hw,
3899 &sdata->u.mgd.beacon_connection_loss_work);
3902 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3904 struct ieee80211_sub_if_data *sdata =
3905 (struct ieee80211_sub_if_data *) data;
3906 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3907 struct ieee80211_local *local = sdata->local;
3909 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3912 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3915 static void ieee80211_sta_monitor_work(struct work_struct *work)
3917 struct ieee80211_sub_if_data *sdata =
3918 container_of(work, struct ieee80211_sub_if_data,
3919 u.mgd.monitor_work);
3921 ieee80211_mgd_probe_ap(sdata, false);
3924 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3928 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3929 __ieee80211_stop_poll(sdata);
3931 /* let's probe the connection once */
3932 flags = sdata->local->hw.flags;
3933 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3934 ieee80211_queue_work(&sdata->local->hw,
3935 &sdata->u.mgd.monitor_work);
3936 /* and do all the other regular work too */
3937 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3942 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3944 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3945 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3949 if (ifmgd->auth_data || ifmgd->assoc_data) {
3950 const u8 *bssid = ifmgd->auth_data ?
3951 ifmgd->auth_data->bss->bssid :
3952 ifmgd->assoc_data->bss->bssid;
3955 * If we are trying to authenticate / associate while suspending,
3956 * cfg80211 won't know and won't actually abort those attempts,
3957 * thus we need to do that ourselves.
3959 ieee80211_send_deauth_disassoc(sdata, bssid,
3960 IEEE80211_STYPE_DEAUTH,
3961 WLAN_REASON_DEAUTH_LEAVING,
3963 if (ifmgd->assoc_data)
3964 ieee80211_destroy_assoc_data(sdata, false);
3965 if (ifmgd->auth_data)
3966 ieee80211_destroy_auth_data(sdata, false);
3967 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3968 IEEE80211_DEAUTH_FRAME_LEN);
3971 /* This is a bit of a hack - we should find a better and more generic
3972 * solution to this. Normally when suspending, cfg80211 will in fact
3973 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
3974 * auth (not so important) or assoc (this is the problem) process.
3976 * As a consequence, it can happen that we are in the process of both
3977 * associating and suspending, and receive an association response
3978 * after cfg80211 has checked if it needs to disconnect, but before
3979 * we actually set the flag to drop incoming frames. This will then
3980 * cause the workqueue flush to process the association response in
3981 * the suspend, resulting in a successful association just before it
3982 * tries to remove the interface from the driver, which now though
3983 * has a channel context assigned ... this results in issues.
3985 * To work around this (for now) simply deauth here again if we're
3988 if (ifmgd->associated && !sdata->local->wowlan) {
3990 struct cfg80211_deauth_request req = {
3991 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
3995 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3996 ieee80211_mgd_deauth(sdata, &req);
3999 sdata_unlock(sdata);
4002 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4004 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4007 if (!ifmgd->associated) {
4008 sdata_unlock(sdata);
4012 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4013 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4014 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4015 ieee80211_sta_connection_lost(sdata,
4016 ifmgd->associated->bssid,
4017 WLAN_REASON_UNSPECIFIED,
4019 sdata_unlock(sdata);
4022 sdata_unlock(sdata);
4026 /* interface setup */
4027 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4029 struct ieee80211_if_managed *ifmgd;
4031 ifmgd = &sdata->u.mgd;
4032 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4033 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4034 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4035 ieee80211_beacon_connection_loss_work);
4036 INIT_WORK(&ifmgd->csa_connection_drop_work,
4037 ieee80211_csa_connection_drop_work);
4038 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4039 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4040 ieee80211_tdls_peer_del_work);
4041 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4042 (unsigned long) sdata);
4043 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4044 (unsigned long) sdata);
4045 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4046 (unsigned long) sdata);
4047 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4048 (unsigned long) sdata);
4049 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4050 ieee80211_sta_handle_tspec_ac_params_wk);
4053 ifmgd->powersave = sdata->wdev.ps;
4054 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4055 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4056 ifmgd->p2p_noa_index = -1;
4058 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4059 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4061 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4063 /* Setup TDLS data */
4064 spin_lock_init(&ifmgd->teardown_lock);
4065 ifmgd->teardown_skb = NULL;
4066 ifmgd->orig_teardown_skb = NULL;
4069 /* scan finished notification */
4070 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4072 struct ieee80211_sub_if_data *sdata;
4074 /* Restart STA timers */
4076 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4077 if (ieee80211_sdata_running(sdata))
4078 ieee80211_restart_sta_timer(sdata);
4083 int ieee80211_max_network_latency(struct notifier_block *nb,
4084 unsigned long data, void *dummy)
4086 s32 latency_usec = (s32) data;
4087 struct ieee80211_local *local =
4088 container_of(nb, struct ieee80211_local,
4089 network_latency_notifier);
4091 mutex_lock(&local->iflist_mtx);
4092 ieee80211_recalc_ps(local, latency_usec);
4093 mutex_unlock(&local->iflist_mtx);
4098 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4099 struct cfg80211_bss *cbss)
4101 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4102 const u8 *ht_cap_ie, *vht_cap_ie;
4103 const struct ieee80211_ht_cap *ht_cap;
4104 const struct ieee80211_vht_cap *vht_cap;
4107 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4110 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4111 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4112 ht_cap = (void *)(ht_cap_ie + 2);
4113 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4115 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4116 * "Tx Unequal Modulation Supported" fields.
4120 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4123 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4124 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4128 vht_cap = (void *)(vht_cap_ie + 2);
4129 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4130 for (nss = 8; nss > 0; nss--) {
4131 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4132 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4135 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4136 chains = max(chains, nss);
4142 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4143 struct cfg80211_bss *cbss)
4145 struct ieee80211_local *local = sdata->local;
4146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4147 const struct ieee80211_ht_cap *ht_cap = NULL;
4148 const struct ieee80211_ht_operation *ht_oper = NULL;
4149 const struct ieee80211_vht_operation *vht_oper = NULL;
4150 struct ieee80211_supported_band *sband;
4151 struct cfg80211_chan_def chandef;
4154 sband = local->hw.wiphy->bands[cbss->channel->band];
4156 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4157 IEEE80211_STA_DISABLE_80P80MHZ |
4158 IEEE80211_STA_DISABLE_160MHZ);
4162 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4163 sband->ht_cap.ht_supported) {
4164 const u8 *ht_oper_ie, *ht_cap_ie;
4166 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4167 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4168 ht_oper = (void *)(ht_oper_ie + 2);
4170 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4171 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4172 ht_cap = (void *)(ht_cap_ie + 2);
4175 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4180 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4181 sband->vht_cap.vht_supported) {
4182 const u8 *vht_oper_ie, *vht_cap;
4184 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4185 WLAN_EID_VHT_OPERATION);
4186 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4187 vht_oper = (void *)(vht_oper_ie + 2);
4188 if (vht_oper && !ht_oper) {
4191 "AP advertised VHT without HT, disabling both\n");
4192 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4193 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4196 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4197 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4198 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4203 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4205 ht_cap, ht_oper, vht_oper,
4208 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4213 /* will change later if needed */
4214 sdata->smps_mode = IEEE80211_SMPS_OFF;
4216 mutex_lock(&local->mtx);
4218 * If this fails (possibly due to channel context sharing
4219 * on incompatible channels, e.g. 80+80 and 160 sharing the
4220 * same control channel) try to use a smaller bandwidth.
4222 ret = ieee80211_vif_use_channel(sdata, &chandef,
4223 IEEE80211_CHANCTX_SHARED);
4225 /* don't downgrade for 5 and 10 MHz channels, though. */
4226 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4227 chandef.width == NL80211_CHAN_WIDTH_10)
4230 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4231 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4232 ret = ieee80211_vif_use_channel(sdata, &chandef,
4233 IEEE80211_CHANCTX_SHARED);
4236 mutex_unlock(&local->mtx);
4240 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4241 struct cfg80211_bss *cbss, bool assoc)
4243 struct ieee80211_local *local = sdata->local;
4244 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4245 struct ieee80211_bss *bss = (void *)cbss->priv;
4246 struct sta_info *new_sta = NULL;
4247 struct ieee80211_supported_band *sband;
4248 struct ieee80211_sta_ht_cap sta_ht_cap;
4249 bool have_sta = false, is_override = false;
4252 sband = local->hw.wiphy->bands[cbss->channel->band];
4254 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4259 have_sta = sta_info_get(sdata, cbss->bssid);
4264 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4269 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4270 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4272 is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
4273 (sband->ht_cap.cap &
4274 IEEE80211_HT_CAP_SUP_WIDTH_20_40);
4276 if (new_sta || is_override) {
4277 err = ieee80211_prep_channel(sdata, cbss);
4280 sta_info_free(local, new_sta);
4286 u32 rates = 0, basic_rates = 0;
4287 bool have_higher_than_11mbit;
4288 int min_rate = INT_MAX, min_rate_index = -1;
4289 struct ieee80211_chanctx_conf *chanctx_conf;
4290 const struct cfg80211_bss_ies *ies;
4291 int shift = ieee80211_vif_get_shift(&sdata->vif);
4295 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4296 if (WARN_ON(!chanctx_conf)) {
4298 sta_info_free(local, new_sta);
4301 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4304 ieee80211_get_rates(sband, bss->supp_rates,
4305 bss->supp_rates_len,
4306 &rates, &basic_rates,
4307 &have_higher_than_11mbit,
4308 &min_rate, &min_rate_index,
4312 * This used to be a workaround for basic rates missing
4313 * in the association response frame. Now that we no
4314 * longer use the basic rates from there, it probably
4315 * doesn't happen any more, but keep the workaround so
4316 * in case some *other* APs are buggy in different ways
4317 * we can connect -- with a warning.
4319 if (!basic_rates && min_rate_index >= 0) {
4321 "No basic rates, using min rate instead\n");
4322 basic_rates = BIT(min_rate_index);
4325 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4326 sdata->vif.bss_conf.basic_rates = basic_rates;
4328 /* cf. IEEE 802.11 9.2.12 */
4329 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4330 have_higher_than_11mbit)
4331 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4333 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4335 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4337 /* set timing information */
4338 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4340 ies = rcu_dereference(cbss->beacon_ies);
4344 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4345 sdata->vif.bss_conf.sync_device_ts =
4346 bss->device_ts_beacon;
4347 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4348 ies->data, ies->len);
4349 if (tim_ie && tim_ie[1] >= 2)
4350 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4352 sdata->vif.bss_conf.sync_dtim_count = 0;
4353 } else if (!(local->hw.flags &
4354 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4355 ies = rcu_dereference(cbss->proberesp_ies);
4356 /* must be non-NULL since beacon IEs were NULL */
4357 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4358 sdata->vif.bss_conf.sync_device_ts =
4359 bss->device_ts_presp;
4360 sdata->vif.bss_conf.sync_dtim_count = 0;
4362 sdata->vif.bss_conf.sync_tsf = 0;
4363 sdata->vif.bss_conf.sync_device_ts = 0;
4364 sdata->vif.bss_conf.sync_dtim_count = 0;
4368 /* tell driver about BSSID, basic rates and timing */
4369 ieee80211_bss_info_change_notify(sdata,
4370 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4371 BSS_CHANGED_BEACON_INT);
4374 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4376 err = sta_info_insert(new_sta);
4380 "failed to insert STA entry for the AP (error %d)\n",
4385 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4391 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4392 struct cfg80211_auth_request *req)
4394 struct ieee80211_local *local = sdata->local;
4395 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4396 struct ieee80211_mgd_auth_data *auth_data;
4400 /* prepare auth data structure */
4402 switch (req->auth_type) {
4403 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4404 auth_alg = WLAN_AUTH_OPEN;
4406 case NL80211_AUTHTYPE_SHARED_KEY:
4407 if (IS_ERR(local->wep_tx_tfm))
4409 auth_alg = WLAN_AUTH_SHARED_KEY;
4411 case NL80211_AUTHTYPE_FT:
4412 auth_alg = WLAN_AUTH_FT;
4414 case NL80211_AUTHTYPE_NETWORK_EAP:
4415 auth_alg = WLAN_AUTH_LEAP;
4417 case NL80211_AUTHTYPE_SAE:
4418 auth_alg = WLAN_AUTH_SAE;
4424 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4425 req->ie_len, GFP_KERNEL);
4429 auth_data->bss = req->bss;
4431 if (req->sae_data_len >= 4) {
4432 __le16 *pos = (__le16 *) req->sae_data;
4433 auth_data->sae_trans = le16_to_cpu(pos[0]);
4434 auth_data->sae_status = le16_to_cpu(pos[1]);
4435 memcpy(auth_data->data, req->sae_data + 4,
4436 req->sae_data_len - 4);
4437 auth_data->data_len += req->sae_data_len - 4;
4440 if (req->ie && req->ie_len) {
4441 memcpy(&auth_data->data[auth_data->data_len],
4442 req->ie, req->ie_len);
4443 auth_data->data_len += req->ie_len;
4446 if (req->key && req->key_len) {
4447 auth_data->key_len = req->key_len;
4448 auth_data->key_idx = req->key_idx;
4449 memcpy(auth_data->key, req->key, req->key_len);
4452 auth_data->algorithm = auth_alg;
4454 /* try to authenticate/probe */
4456 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4457 ifmgd->assoc_data) {
4462 if (ifmgd->auth_data)
4463 ieee80211_destroy_auth_data(sdata, false);
4465 /* prep auth_data so we don't go into idle on disassoc */
4466 ifmgd->auth_data = auth_data;
4468 if (ifmgd->associated) {
4469 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4471 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4472 WLAN_REASON_UNSPECIFIED,
4475 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4479 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4481 err = ieee80211_prep_connection(sdata, req->bss, false);
4485 err = ieee80211_probe_auth(sdata);
4487 sta_info_destroy_addr(sdata, req->bss->bssid);
4491 /* hold our own reference */
4492 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4496 memset(ifmgd->bssid, 0, ETH_ALEN);
4497 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4498 ifmgd->auth_data = NULL;
4504 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4505 const u8 *wmm_param, int len)
4513 if (wmm_param[5] != 1 /* version */)
4516 pos = wmm_param + 8;
4519 for (; left >= 4; left -= 4, pos += 4) {
4520 u8 aifsn = pos[0] & 0x0f;
4521 u8 ecwmin = pos[1] & 0x0f;
4522 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4523 int aci = (pos[0] >> 5) & 0x03;
4527 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4531 if (ecwmin > ecwmax) {
4533 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4534 ecwmin, ecwmax, aci);
4542 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4543 struct cfg80211_assoc_request *req)
4545 struct ieee80211_local *local = sdata->local;
4546 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4547 struct ieee80211_bss *bss = (void *)req->bss->priv;
4548 struct ieee80211_mgd_assoc_data *assoc_data;
4549 const struct cfg80211_bss_ies *beacon_ies;
4550 struct ieee80211_supported_band *sband;
4551 const u8 *ssidie, *ht_ie, *vht_ie;
4554 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4559 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4565 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4566 assoc_data->ssid_len = ssidie[1];
4569 if (ifmgd->associated) {
4570 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4572 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4573 WLAN_REASON_UNSPECIFIED,
4576 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4580 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4585 if (ifmgd->assoc_data) {
4590 if (ifmgd->auth_data) {
4593 /* keep sta info, bssid if matching */
4594 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4595 ieee80211_destroy_auth_data(sdata, match);
4598 /* prepare assoc data */
4600 ifmgd->beacon_crc_valid = false;
4602 assoc_data->wmm = bss->wmm_used &&
4603 (local->hw.queues >= IEEE80211_NUM_ACS);
4604 if (assoc_data->wmm) {
4605 /* try to check validity of WMM params IE */
4606 const struct cfg80211_bss_ies *ies;
4607 const u8 *wp, *start, *end;
4610 ies = rcu_dereference(req->bss->ies);
4612 end = start + ies->len;
4615 wp = cfg80211_find_vendor_ie(
4617 WLAN_OUI_TYPE_MICROSOFT_WMM,
4618 start, end - start);
4621 start = wp + wp[1] + 2;
4622 /* if this IE is too short, try the next */
4625 /* if this IE is WMM params, we found what we wanted */
4630 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4632 assoc_data->wmm = false;
4633 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4639 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4640 * We still associate in non-HT mode (11a/b/g) if any one of these
4641 * ciphers is configured as pairwise.
4642 * We can set this to true for non-11n hardware, that'll be checked
4643 * separately along with the peer capabilities.
4645 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4646 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4647 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4648 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4649 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4650 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4651 netdev_info(sdata->dev,
4652 "disabling HT/VHT due to WEP/TKIP use\n");
4656 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4657 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4658 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4661 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4662 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4664 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4665 sband = local->hw.wiphy->bands[req->bss->channel->band];
4666 if (!sband->ht_cap.ht_supported ||
4667 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4668 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4669 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4670 if (!bss->wmm_used &&
4671 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4672 netdev_info(sdata->dev,
4673 "disabling HT as WMM/QoS is not supported by the AP\n");
4676 /* disable VHT if we don't support it or the AP doesn't use WMM */
4677 if (!sband->vht_cap.vht_supported ||
4678 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4679 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4680 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4681 if (!bss->wmm_used &&
4682 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4683 netdev_info(sdata->dev,
4684 "disabling VHT as WMM/QoS is not supported by the AP\n");
4687 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4688 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4689 sizeof(ifmgd->ht_capa_mask));
4691 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4692 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4693 sizeof(ifmgd->vht_capa_mask));
4695 if (req->ie && req->ie_len) {
4696 memcpy(assoc_data->ie, req->ie, req->ie_len);
4697 assoc_data->ie_len = req->ie_len;
4700 assoc_data->bss = req->bss;
4702 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4703 if (ifmgd->powersave)
4704 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4706 sdata->smps_mode = IEEE80211_SMPS_OFF;
4708 sdata->smps_mode = ifmgd->req_smps;
4710 assoc_data->capability = req->bss->capability;
4711 assoc_data->supp_rates = bss->supp_rates;
4712 assoc_data->supp_rates_len = bss->supp_rates_len;
4715 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4716 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4717 assoc_data->ap_ht_param =
4718 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4720 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4721 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4722 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4723 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4724 sizeof(struct ieee80211_vht_cap));
4726 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4729 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4730 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4731 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4732 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4734 if (bss->wmm_used && bss->uapsd_supported &&
4735 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4736 assoc_data->uapsd = true;
4737 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4739 assoc_data->uapsd = false;
4740 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4743 if (req->prev_bssid)
4744 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4747 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4748 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4750 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4751 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4754 if (req->flags & ASSOC_REQ_USE_RRM)
4755 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4757 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4759 if (req->crypto.control_port)
4760 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4762 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4764 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4765 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4766 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4769 /* kick off associate process */
4771 ifmgd->assoc_data = assoc_data;
4772 ifmgd->dtim_period = 0;
4773 ifmgd->have_beacon = false;
4775 err = ieee80211_prep_connection(sdata, req->bss, true);
4780 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4782 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4785 * Wait up to one beacon interval ...
4786 * should this be more if we miss one?
4788 sdata_info(sdata, "waiting for beacon from %pM\n",
4790 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4791 assoc_data->timeout_started = true;
4792 assoc_data->need_beacon = true;
4793 } else if (beacon_ies) {
4794 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4799 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4800 const struct ieee80211_tim_ie *tim;
4801 tim = (void *)(tim_ie + 2);
4802 ifmgd->dtim_period = tim->dtim_period;
4803 dtim_count = tim->dtim_count;
4805 ifmgd->have_beacon = true;
4806 assoc_data->timeout = jiffies;
4807 assoc_data->timeout_started = true;
4809 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4810 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4811 sdata->vif.bss_conf.sync_device_ts =
4812 bss->device_ts_beacon;
4813 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4816 assoc_data->timeout = jiffies;
4817 assoc_data->timeout_started = true;
4821 run_again(sdata, assoc_data->timeout);
4823 if (bss->corrupt_data) {
4824 char *corrupt_type = "data";
4825 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4826 if (bss->corrupt_data &
4827 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4828 corrupt_type = "beacon and probe response";
4830 corrupt_type = "beacon";
4831 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4832 corrupt_type = "probe response";
4833 sdata_info(sdata, "associating with AP with corrupt %s\n",
4839 memset(ifmgd->bssid, 0, ETH_ALEN);
4840 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4841 ifmgd->assoc_data = NULL;
4847 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4848 struct cfg80211_deauth_request *req)
4850 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4851 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4852 bool tx = !req->local_state_change;
4854 if (ifmgd->auth_data &&
4855 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4857 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4858 req->bssid, req->reason_code,
4859 ieee80211_get_reason_code_string(req->reason_code));
4861 drv_mgd_prepare_tx(sdata->local, sdata);
4862 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4863 IEEE80211_STYPE_DEAUTH,
4864 req->reason_code, tx,
4866 ieee80211_destroy_auth_data(sdata, false);
4867 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4868 IEEE80211_DEAUTH_FRAME_LEN);
4873 if (ifmgd->associated &&
4874 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4876 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4877 req->bssid, req->reason_code,
4878 ieee80211_get_reason_code_string(req->reason_code));
4880 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4881 req->reason_code, tx, frame_buf);
4882 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4883 IEEE80211_DEAUTH_FRAME_LEN);
4890 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4891 struct cfg80211_disassoc_request *req)
4893 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4895 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4898 * cfg80211 should catch this ... but it's racy since
4899 * we can receive a disassoc frame, process it, hand it
4900 * to cfg80211 while that's in a locked section already
4901 * trying to tell us that the user wants to disconnect.
4903 if (ifmgd->associated != req->bss)
4907 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4908 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4910 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4911 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4912 req->reason_code, !req->local_state_change,
4915 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4916 IEEE80211_DEAUTH_FRAME_LEN);
4921 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4923 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4926 * Make sure some work items will not run after this,
4927 * they will not do anything but might not have been
4928 * cancelled when disconnecting.
4930 cancel_work_sync(&ifmgd->monitor_work);
4931 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4932 cancel_work_sync(&ifmgd->request_smps_work);
4933 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4934 cancel_work_sync(&ifmgd->chswitch_work);
4935 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4938 if (ifmgd->assoc_data) {
4939 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4940 ieee80211_destroy_assoc_data(sdata, false);
4941 cfg80211_assoc_timeout(sdata->dev, bss);
4943 if (ifmgd->auth_data)
4944 ieee80211_destroy_auth_data(sdata, false);
4945 spin_lock_bh(&ifmgd->teardown_lock);
4946 if (ifmgd->teardown_skb) {
4947 kfree_skb(ifmgd->teardown_skb);
4948 ifmgd->teardown_skb = NULL;
4949 ifmgd->orig_teardown_skb = NULL;
4951 spin_unlock_bh(&ifmgd->teardown_lock);
4952 del_timer_sync(&ifmgd->timer);
4953 sdata_unlock(sdata);
4956 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4957 enum nl80211_cqm_rssi_threshold_event rssi_event,
4960 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4962 trace_api_cqm_rssi_notify(sdata, rssi_event);
4964 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4966 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
4968 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4970 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4972 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
4974 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
4976 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);