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;
2498 struct ieee80211_event event = {
2500 .u.mlme.data = AUTH_EVENT,
2503 sdata_assert_lock(sdata);
2508 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2511 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2513 if (!ether_addr_equal(bssid, mgmt->bssid))
2516 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2517 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2518 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2520 if (auth_alg != ifmgd->auth_data->algorithm ||
2521 auth_transaction != ifmgd->auth_data->expected_transaction) {
2522 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2523 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2525 ifmgd->auth_data->expected_transaction);
2529 if (status_code != WLAN_STATUS_SUCCESS) {
2530 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2531 mgmt->sa, status_code);
2532 ieee80211_destroy_auth_data(sdata, false);
2533 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2534 event.u.mlme.status = MLME_DENIED;
2535 event.u.mlme.reason = status_code;
2536 drv_event_callback(sdata->local, sdata, &event);
2540 switch (ifmgd->auth_data->algorithm) {
2541 case WLAN_AUTH_OPEN:
2542 case WLAN_AUTH_LEAP:
2546 case WLAN_AUTH_SHARED_KEY:
2547 if (ifmgd->auth_data->expected_transaction != 4) {
2548 ieee80211_auth_challenge(sdata, mgmt, len);
2549 /* need another frame */
2554 WARN_ONCE(1, "invalid auth alg %d",
2555 ifmgd->auth_data->algorithm);
2559 event.u.mlme.status = MLME_SUCCESS;
2560 drv_event_callback(sdata->local, sdata, &event);
2561 sdata_info(sdata, "authenticated\n");
2562 ifmgd->auth_data->done = true;
2563 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2564 ifmgd->auth_data->timeout_started = true;
2565 run_again(sdata, ifmgd->auth_data->timeout);
2567 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2568 ifmgd->auth_data->expected_transaction != 2) {
2570 * Report auth frame to user space for processing since another
2571 * round of Authentication frames is still needed.
2573 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2577 /* move station state to auth */
2578 mutex_lock(&sdata->local->sta_mtx);
2579 sta = sta_info_get(sdata, bssid);
2581 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2584 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2585 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2588 mutex_unlock(&sdata->local->sta_mtx);
2590 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2593 mutex_unlock(&sdata->local->sta_mtx);
2594 /* ignore frame -- wait for timeout */
2597 #define case_WLAN(type) \
2598 case WLAN_REASON_##type: return #type
2600 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2602 switch (reason_code) {
2603 case_WLAN(UNSPECIFIED);
2604 case_WLAN(PREV_AUTH_NOT_VALID);
2605 case_WLAN(DEAUTH_LEAVING);
2606 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2607 case_WLAN(DISASSOC_AP_BUSY);
2608 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2609 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2610 case_WLAN(DISASSOC_STA_HAS_LEFT);
2611 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2612 case_WLAN(DISASSOC_BAD_POWER);
2613 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2614 case_WLAN(INVALID_IE);
2615 case_WLAN(MIC_FAILURE);
2616 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2617 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2618 case_WLAN(IE_DIFFERENT);
2619 case_WLAN(INVALID_GROUP_CIPHER);
2620 case_WLAN(INVALID_PAIRWISE_CIPHER);
2621 case_WLAN(INVALID_AKMP);
2622 case_WLAN(UNSUPP_RSN_VERSION);
2623 case_WLAN(INVALID_RSN_IE_CAP);
2624 case_WLAN(IEEE8021X_FAILED);
2625 case_WLAN(CIPHER_SUITE_REJECTED);
2626 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2627 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2628 case_WLAN(DISASSOC_LOW_ACK);
2629 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2630 case_WLAN(QSTA_LEAVE_QBSS);
2631 case_WLAN(QSTA_NOT_USE);
2632 case_WLAN(QSTA_REQUIRE_SETUP);
2633 case_WLAN(QSTA_TIMEOUT);
2634 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2635 case_WLAN(MESH_PEER_CANCELED);
2636 case_WLAN(MESH_MAX_PEERS);
2637 case_WLAN(MESH_CONFIG);
2638 case_WLAN(MESH_CLOSE);
2639 case_WLAN(MESH_MAX_RETRIES);
2640 case_WLAN(MESH_CONFIRM_TIMEOUT);
2641 case_WLAN(MESH_INVALID_GTK);
2642 case_WLAN(MESH_INCONSISTENT_PARAM);
2643 case_WLAN(MESH_INVALID_SECURITY);
2644 case_WLAN(MESH_PATH_ERROR);
2645 case_WLAN(MESH_PATH_NOFORWARD);
2646 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2647 case_WLAN(MAC_EXISTS_IN_MBSS);
2648 case_WLAN(MESH_CHAN_REGULATORY);
2649 case_WLAN(MESH_CHAN);
2650 default: return "<unknown>";
2654 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2655 struct ieee80211_mgmt *mgmt, size_t len)
2657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2658 const u8 *bssid = NULL;
2661 sdata_assert_lock(sdata);
2666 if (!ifmgd->associated ||
2667 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2670 bssid = ifmgd->associated->bssid;
2672 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2674 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2675 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2677 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2679 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2683 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2684 struct ieee80211_mgmt *mgmt, size_t len)
2686 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2689 sdata_assert_lock(sdata);
2694 if (!ifmgd->associated ||
2695 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2698 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2700 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2701 mgmt->sa, reason_code);
2703 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2705 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2708 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2709 u8 *supp_rates, unsigned int supp_rates_len,
2710 u32 *rates, u32 *basic_rates,
2711 bool *have_higher_than_11mbit,
2712 int *min_rate, int *min_rate_index,
2713 int shift, u32 rate_flags)
2717 for (i = 0; i < supp_rates_len; i++) {
2718 int rate = supp_rates[i] & 0x7f;
2719 bool is_basic = !!(supp_rates[i] & 0x80);
2721 if ((rate * 5 * (1 << shift)) > 110)
2722 *have_higher_than_11mbit = true;
2725 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2726 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2728 * Note: Even through the membership selector and the basic
2729 * rate flag share the same bit, they are not exactly
2732 if (!!(supp_rates[i] & 0x80) &&
2733 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2736 for (j = 0; j < sband->n_bitrates; j++) {
2737 struct ieee80211_rate *br;
2740 br = &sband->bitrates[j];
2741 if ((rate_flags & br->flags) != rate_flags)
2744 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2745 if (brate == rate) {
2748 *basic_rates |= BIT(j);
2749 if ((rate * 5) < *min_rate) {
2750 *min_rate = rate * 5;
2751 *min_rate_index = j;
2759 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2762 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2764 sdata_assert_lock(sdata);
2768 * we are not associated yet, the only timer that could be
2769 * running is the timeout for the association response which
2770 * which is not relevant anymore.
2772 del_timer_sync(&sdata->u.mgd.timer);
2773 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2775 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2776 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2777 sdata->u.mgd.flags = 0;
2778 mutex_lock(&sdata->local->mtx);
2779 ieee80211_vif_release_channel(sdata);
2780 mutex_unlock(&sdata->local->mtx);
2784 sdata->u.mgd.assoc_data = NULL;
2787 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2788 struct cfg80211_bss *cbss,
2789 struct ieee80211_mgmt *mgmt, size_t len)
2791 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2792 struct ieee80211_local *local = sdata->local;
2793 struct ieee80211_supported_band *sband;
2794 struct sta_info *sta;
2796 u16 capab_info, aid;
2797 struct ieee802_11_elems elems;
2798 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2799 const struct cfg80211_bss_ies *bss_ies = NULL;
2800 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2805 /* AssocResp and ReassocResp have identical structure */
2807 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2808 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2810 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2811 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2813 aid &= ~(BIT(15) | BIT(14));
2815 ifmgd->broken_ap = false;
2817 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2818 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2821 ifmgd->broken_ap = true;
2824 pos = mgmt->u.assoc_resp.variable;
2825 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2827 if (!elems.supp_rates) {
2828 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2833 ifmgd->tdls_chan_switch_prohibited =
2834 elems.ext_capab && elems.ext_capab_len >= 5 &&
2835 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2838 * Some APs are erroneously not including some information in their
2839 * (re)association response frames. Try to recover by using the data
2840 * from the beacon or probe response. This seems to afflict mobile
2841 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2842 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2844 if ((assoc_data->wmm && !elems.wmm_param) ||
2845 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2846 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2847 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2848 (!elems.vht_cap_elem || !elems.vht_operation))) {
2849 const struct cfg80211_bss_ies *ies;
2850 struct ieee802_11_elems bss_elems;
2853 ies = rcu_dereference(cbss->ies);
2855 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2861 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2863 if (assoc_data->wmm &&
2864 !elems.wmm_param && bss_elems.wmm_param) {
2865 elems.wmm_param = bss_elems.wmm_param;
2867 "AP bug: WMM param missing from AssocResp\n");
2871 * Also check if we requested HT/VHT, otherwise the AP doesn't
2872 * have to include the IEs in the (re)association response.
2874 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2875 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2876 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2878 "AP bug: HT capability missing from AssocResp\n");
2880 if (!elems.ht_operation && bss_elems.ht_operation &&
2881 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2882 elems.ht_operation = bss_elems.ht_operation;
2884 "AP bug: HT operation missing from AssocResp\n");
2886 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2887 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2888 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2890 "AP bug: VHT capa missing from AssocResp\n");
2892 if (!elems.vht_operation && bss_elems.vht_operation &&
2893 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2894 elems.vht_operation = bss_elems.vht_operation;
2896 "AP bug: VHT operation missing from AssocResp\n");
2901 * We previously checked these in the beacon/probe response, so
2902 * they should be present here. This is just a safety net.
2904 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2905 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2907 "HT AP is missing WMM params or HT capability/operation\n");
2912 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2913 (!elems.vht_cap_elem || !elems.vht_operation)) {
2915 "VHT AP is missing VHT capability/operation\n");
2920 mutex_lock(&sdata->local->sta_mtx);
2922 * station info was already allocated and inserted before
2923 * the association and should be available to us
2925 sta = sta_info_get(sdata, cbss->bssid);
2926 if (WARN_ON(!sta)) {
2927 mutex_unlock(&sdata->local->sta_mtx);
2932 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2934 /* Set up internal HT/VHT capabilities */
2935 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2936 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2937 elems.ht_cap_elem, sta);
2939 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2940 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2941 elems.vht_cap_elem, sta);
2944 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2945 * in their association response, so ignore that data for our own
2946 * configuration. If it changed since the last beacon, we'll get the
2947 * next beacon and update then.
2951 * If an operating mode notification IE is present, override the
2952 * NSS calculation (that would be done in rate_control_rate_init())
2953 * and use the # of streams from that element.
2955 if (elems.opmode_notif &&
2956 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2959 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2960 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2962 sta->sta.rx_nss = nss;
2965 rate_control_rate_init(sta);
2967 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
2968 set_sta_flag(sta, WLAN_STA_MFP);
2969 sta->sta.mfp = true;
2971 sta->sta.mfp = false;
2974 sta->sta.wme = elems.wmm_param;
2976 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2977 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2978 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2981 "failed to move station %pM to desired state\n",
2983 WARN_ON(__sta_info_destroy(sta));
2984 mutex_unlock(&sdata->local->sta_mtx);
2989 mutex_unlock(&sdata->local->sta_mtx);
2992 * Always handle WMM once after association regardless
2993 * of the first value the AP uses. Setting -1 here has
2994 * that effect because the AP values is an unsigned
2997 ifmgd->wmm_last_param_set = -1;
2999 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
3000 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3001 elems.wmm_param_len);
3003 ieee80211_set_wmm_default(sdata, false);
3004 changed |= BSS_CHANGED_QOS;
3006 /* set AID and assoc capability,
3007 * ieee80211_set_associated() will tell the driver */
3008 bss_conf->aid = aid;
3009 bss_conf->assoc_capability = capab_info;
3010 ieee80211_set_associated(sdata, cbss, changed);
3013 * If we're using 4-addr mode, let the AP know that we're
3014 * doing so, so that it can create the STA VLAN on its side
3016 if (ifmgd->use_4addr)
3017 ieee80211_send_4addr_nullfunc(local, sdata);
3020 * Start timer to probe the connection to the AP now.
3021 * Also start the timer that will detect beacon loss.
3023 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3024 ieee80211_sta_reset_beacon_monitor(sdata);
3032 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3033 struct ieee80211_mgmt *mgmt,
3036 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3037 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3038 u16 capab_info, status_code, aid;
3039 struct ieee802_11_elems elems;
3040 int ac, uapsd_queues = -1;
3043 struct cfg80211_bss *bss;
3045 sdata_assert_lock(sdata);
3049 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3053 * AssocResp and ReassocResp have identical structure, so process both
3054 * of them in this function.
3060 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3061 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3062 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3063 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3066 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3067 reassoc ? "Rea" : "A", mgmt->sa,
3068 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3070 pos = mgmt->u.assoc_resp.variable;
3071 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3073 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3074 elems.timeout_int &&
3075 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3077 tu = le32_to_cpu(elems.timeout_int->value);
3078 ms = tu * 1024 / 1000;
3080 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3082 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3083 assoc_data->timeout_started = true;
3084 if (ms > IEEE80211_ASSOC_TIMEOUT)
3085 run_again(sdata, assoc_data->timeout);
3089 bss = assoc_data->bss;
3091 if (status_code != WLAN_STATUS_SUCCESS) {
3092 sdata_info(sdata, "%pM denied association (code=%d)\n",
3093 mgmt->sa, status_code);
3094 ieee80211_destroy_assoc_data(sdata, false);
3096 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3097 /* oops -- internal error -- send timeout for now */
3098 ieee80211_destroy_assoc_data(sdata, false);
3099 cfg80211_assoc_timeout(sdata->dev, bss);
3102 sdata_info(sdata, "associated\n");
3105 * destroy assoc_data afterwards, as otherwise an idle
3106 * recalc after assoc_data is NULL but before associated
3107 * is set can cause the interface to go idle
3109 ieee80211_destroy_assoc_data(sdata, true);
3111 /* get uapsd queues configuration */
3113 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3114 if (sdata->tx_conf[ac].uapsd)
3115 uapsd_queues |= BIT(ac);
3118 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3121 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3122 struct ieee80211_mgmt *mgmt, size_t len,
3123 struct ieee80211_rx_status *rx_status,
3124 struct ieee802_11_elems *elems)
3126 struct ieee80211_local *local = sdata->local;
3127 struct ieee80211_bss *bss;
3128 struct ieee80211_channel *channel;
3130 sdata_assert_lock(sdata);
3132 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3136 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3139 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3140 ieee80211_rx_bss_put(local, bss);
3145 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3146 struct sk_buff *skb)
3148 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3149 struct ieee80211_if_managed *ifmgd;
3150 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3151 size_t baselen, len = skb->len;
3152 struct ieee802_11_elems elems;
3154 ifmgd = &sdata->u.mgd;
3156 sdata_assert_lock(sdata);
3158 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3159 return; /* ignore ProbeResp to foreign address */
3161 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3165 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3168 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3170 if (ifmgd->associated &&
3171 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3172 ieee80211_reset_ap_probe(sdata);
3174 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3175 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3176 /* got probe response, continue with auth */
3177 sdata_info(sdata, "direct probe responded\n");
3178 ifmgd->auth_data->tries = 0;
3179 ifmgd->auth_data->timeout = jiffies;
3180 ifmgd->auth_data->timeout_started = true;
3181 run_again(sdata, ifmgd->auth_data->timeout);
3186 * This is the canonical list of information elements we care about,
3187 * the filter code also gives us all changes to the Microsoft OUI
3188 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3189 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3190 * changes to requested client power.
3192 * We implement beacon filtering in software since that means we can
3193 * avoid processing the frame here and in cfg80211, and userspace
3194 * will not be able to tell whether the hardware supports it or not.
3196 * XXX: This list needs to be dynamic -- userspace needs to be able to
3197 * add items it requires. It also needs to be able to tell us to
3198 * look out for other vendor IEs.
3200 static const u64 care_about_ies =
3201 (1ULL << WLAN_EID_COUNTRY) |
3202 (1ULL << WLAN_EID_ERP_INFO) |
3203 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3204 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3205 (1ULL << WLAN_EID_HT_CAPABILITY) |
3206 (1ULL << WLAN_EID_HT_OPERATION);
3208 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3209 struct ieee80211_mgmt *mgmt, size_t len,
3210 struct ieee80211_rx_status *rx_status)
3212 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3213 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3215 struct ieee802_11_elems elems;
3216 struct ieee80211_local *local = sdata->local;
3217 struct ieee80211_chanctx_conf *chanctx_conf;
3218 struct ieee80211_channel *chan;
3219 struct sta_info *sta;
3225 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3227 sdata_assert_lock(sdata);
3229 /* Process beacon from the current BSS */
3230 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3235 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3236 if (!chanctx_conf) {
3241 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3245 chan = chanctx_conf->def.chan;
3248 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3249 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3250 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3251 len - baselen, false, &elems);
3253 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3254 if (elems.tim && !elems.parse_error) {
3255 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3256 ifmgd->dtim_period = tim_ie->dtim_period;
3258 ifmgd->have_beacon = true;
3259 ifmgd->assoc_data->need_beacon = false;
3260 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3261 sdata->vif.bss_conf.sync_tsf =
3262 le64_to_cpu(mgmt->u.beacon.timestamp);
3263 sdata->vif.bss_conf.sync_device_ts =
3264 rx_status->device_timestamp;
3266 sdata->vif.bss_conf.sync_dtim_count =
3267 elems.tim->dtim_count;
3269 sdata->vif.bss_conf.sync_dtim_count = 0;
3271 /* continue assoc process */
3272 ifmgd->assoc_data->timeout = jiffies;
3273 ifmgd->assoc_data->timeout_started = true;
3274 run_again(sdata, ifmgd->assoc_data->timeout);
3278 if (!ifmgd->associated ||
3279 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3281 bssid = ifmgd->associated->bssid;
3283 /* Track average RSSI from the Beacon frames of the current AP */
3284 ifmgd->last_beacon_signal = rx_status->signal;
3285 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3286 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3287 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3288 ifmgd->last_cqm_event_signal = 0;
3289 ifmgd->count_beacon_signal = 1;
3290 ifmgd->last_ave_beacon_signal = 0;
3292 ifmgd->ave_beacon_signal =
3293 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3294 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3295 ifmgd->ave_beacon_signal) / 16;
3296 ifmgd->count_beacon_signal++;
3299 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3300 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3301 int sig = ifmgd->ave_beacon_signal;
3302 int last_sig = ifmgd->last_ave_beacon_signal;
3303 struct ieee80211_event event = {
3308 * if signal crosses either of the boundaries, invoke callback
3309 * with appropriate parameters
3311 if (sig > ifmgd->rssi_max_thold &&
3312 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3313 ifmgd->last_ave_beacon_signal = sig;
3314 event.u.rssi.data = RSSI_EVENT_HIGH;
3315 drv_event_callback(local, sdata, &event);
3316 } else if (sig < ifmgd->rssi_min_thold &&
3317 (last_sig >= ifmgd->rssi_max_thold ||
3319 ifmgd->last_ave_beacon_signal = sig;
3320 event.u.rssi.data = RSSI_EVENT_LOW;
3321 drv_event_callback(local, sdata, &event);
3325 if (bss_conf->cqm_rssi_thold &&
3326 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3327 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3328 int sig = ifmgd->ave_beacon_signal / 16;
3329 int last_event = ifmgd->last_cqm_event_signal;
3330 int thold = bss_conf->cqm_rssi_thold;
3331 int hyst = bss_conf->cqm_rssi_hyst;
3333 (last_event == 0 || sig < last_event - hyst)) {
3334 ifmgd->last_cqm_event_signal = sig;
3335 ieee80211_cqm_rssi_notify(
3337 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3339 } else if (sig > thold &&
3340 (last_event == 0 || sig > last_event + hyst)) {
3341 ifmgd->last_cqm_event_signal = sig;
3342 ieee80211_cqm_rssi_notify(
3344 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3349 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3350 mlme_dbg_ratelimited(sdata,
3351 "cancelling AP probe due to a received beacon\n");
3352 ieee80211_reset_ap_probe(sdata);
3356 * Push the beacon loss detection into the future since
3357 * we are processing a beacon from the AP just now.
3359 ieee80211_sta_reset_beacon_monitor(sdata);
3361 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3362 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3363 len - baselen, false, &elems,
3364 care_about_ies, ncrc);
3366 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3367 bool directed_tim = ieee80211_check_tim(elems.tim,
3371 if (local->hw.conf.dynamic_ps_timeout > 0) {
3372 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3373 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3374 ieee80211_hw_config(local,
3375 IEEE80211_CONF_CHANGE_PS);
3377 ieee80211_send_nullfunc(local, sdata, 0);
3378 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3379 local->pspolling = true;
3382 * Here is assumed that the driver will be
3383 * able to send ps-poll frame and receive a
3384 * response even though power save mode is
3385 * enabled, but some drivers might require
3386 * to disable power save here. This needs
3387 * to be investigated.
3389 ieee80211_send_pspoll(local, sdata);
3394 if (sdata->vif.p2p) {
3395 struct ieee80211_p2p_noa_attr noa = {};
3398 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3400 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3401 (u8 *) &noa, sizeof(noa));
3403 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3404 /* valid noa_attr and index changed */
3405 sdata->u.mgd.p2p_noa_index = noa.index;
3406 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3407 changed |= BSS_CHANGED_P2P_PS;
3409 * make sure we update all information, the CRC
3410 * mechanism doesn't look at P2P attributes.
3412 ifmgd->beacon_crc_valid = false;
3414 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3415 /* noa_attr not found and we had valid noa_attr before */
3416 sdata->u.mgd.p2p_noa_index = -1;
3417 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3418 changed |= BSS_CHANGED_P2P_PS;
3419 ifmgd->beacon_crc_valid = false;
3423 if (ifmgd->csa_waiting_bcn)
3424 ieee80211_chswitch_post_beacon(sdata);
3427 * Update beacon timing and dtim count on every beacon appearance. This
3428 * will allow the driver to use the most updated values. Do it before
3429 * comparing this one with last received beacon.
3430 * IMPORTANT: These parameters would possibly be out of sync by the time
3431 * the driver will use them. The synchronized view is currently
3432 * guaranteed only in certain callbacks.
3434 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3435 sdata->vif.bss_conf.sync_tsf =
3436 le64_to_cpu(mgmt->u.beacon.timestamp);
3437 sdata->vif.bss_conf.sync_device_ts =
3438 rx_status->device_timestamp;
3440 sdata->vif.bss_conf.sync_dtim_count =
3441 elems.tim->dtim_count;
3443 sdata->vif.bss_conf.sync_dtim_count = 0;
3446 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3448 ifmgd->beacon_crc = ncrc;
3449 ifmgd->beacon_crc_valid = true;
3451 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3453 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3454 rx_status->device_timestamp,
3457 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3458 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3459 elems.wmm_param_len))
3460 changed |= BSS_CHANGED_QOS;
3463 * If we haven't had a beacon before, tell the driver about the
3464 * DTIM period (and beacon timing if desired) now.
3466 if (!ifmgd->have_beacon) {
3467 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3469 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3471 bss_conf->dtim_period = 1;
3473 changed |= BSS_CHANGED_BEACON_INFO;
3474 ifmgd->have_beacon = true;
3476 mutex_lock(&local->iflist_mtx);
3477 ieee80211_recalc_ps(local, -1);
3478 mutex_unlock(&local->iflist_mtx);
3480 ieee80211_recalc_ps_vif(sdata);
3483 if (elems.erp_info) {
3485 erp_value = elems.erp_info[0];
3489 changed |= ieee80211_handle_bss_capability(sdata,
3490 le16_to_cpu(mgmt->u.beacon.capab_info),
3491 erp_valid, erp_value);
3493 mutex_lock(&local->sta_mtx);
3494 sta = sta_info_get(sdata, bssid);
3496 if (ieee80211_config_bw(sdata, sta,
3497 elems.ht_cap_elem, elems.ht_operation,
3498 elems.vht_operation, bssid, &changed)) {
3499 mutex_unlock(&local->sta_mtx);
3500 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3501 WLAN_REASON_DEAUTH_LEAVING,
3503 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3504 sizeof(deauth_buf));
3508 if (sta && elems.opmode_notif)
3509 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3510 rx_status->band, true);
3511 mutex_unlock(&local->sta_mtx);
3513 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3515 elems.country_elem_len,
3516 elems.pwr_constr_elem,
3517 elems.cisco_dtpc_elem);
3519 ieee80211_bss_info_change_notify(sdata, changed);
3522 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3523 struct sk_buff *skb)
3525 struct ieee80211_rx_status *rx_status;
3526 struct ieee80211_mgmt *mgmt;
3528 struct ieee802_11_elems elems;
3531 rx_status = (struct ieee80211_rx_status *) skb->cb;
3532 mgmt = (struct ieee80211_mgmt *) skb->data;
3533 fc = le16_to_cpu(mgmt->frame_control);
3537 switch (fc & IEEE80211_FCTL_STYPE) {
3538 case IEEE80211_STYPE_BEACON:
3539 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3541 case IEEE80211_STYPE_PROBE_RESP:
3542 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3544 case IEEE80211_STYPE_AUTH:
3545 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3547 case IEEE80211_STYPE_DEAUTH:
3548 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3550 case IEEE80211_STYPE_DISASSOC:
3551 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3553 case IEEE80211_STYPE_ASSOC_RESP:
3554 case IEEE80211_STYPE_REASSOC_RESP:
3555 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3557 case IEEE80211_STYPE_ACTION:
3558 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3559 ies_len = skb->len -
3560 offsetof(struct ieee80211_mgmt,
3561 u.action.u.chan_switch.variable);
3566 ieee802_11_parse_elems(
3567 mgmt->u.action.u.chan_switch.variable,
3568 ies_len, true, &elems);
3570 if (elems.parse_error)
3573 ieee80211_sta_process_chanswitch(sdata,
3575 rx_status->device_timestamp,
3577 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3578 ies_len = skb->len -
3579 offsetof(struct ieee80211_mgmt,
3580 u.action.u.ext_chan_switch.variable);
3585 ieee802_11_parse_elems(
3586 mgmt->u.action.u.ext_chan_switch.variable,
3587 ies_len, true, &elems);
3589 if (elems.parse_error)
3592 /* for the handling code pretend this was also an IE */
3593 elems.ext_chansw_ie =
3594 &mgmt->u.action.u.ext_chan_switch.data;
3596 ieee80211_sta_process_chanswitch(sdata,
3598 rx_status->device_timestamp,
3603 sdata_unlock(sdata);
3606 static void ieee80211_sta_timer(unsigned long data)
3608 struct ieee80211_sub_if_data *sdata =
3609 (struct ieee80211_sub_if_data *) data;
3611 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3614 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3615 u8 *bssid, u8 reason, bool tx)
3617 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3619 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3622 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3623 IEEE80211_DEAUTH_FRAME_LEN);
3626 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3628 struct ieee80211_local *local = sdata->local;
3629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3630 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3633 sdata_assert_lock(sdata);
3635 if (WARN_ON_ONCE(!auth_data))
3640 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3641 sdata_info(sdata, "authentication with %pM timed out\n",
3642 auth_data->bss->bssid);
3645 * Most likely AP is not in the range so remove the
3646 * bss struct for that AP.
3648 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3653 drv_mgd_prepare_tx(local, sdata);
3655 if (auth_data->bss->proberesp_ies) {
3659 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3660 auth_data->bss->bssid, auth_data->tries,
3661 IEEE80211_AUTH_MAX_TRIES);
3663 auth_data->expected_transaction = 2;
3665 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3666 trans = auth_data->sae_trans;
3667 status = auth_data->sae_status;
3668 auth_data->expected_transaction = trans;
3671 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3672 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3673 IEEE80211_TX_INTFL_MLME_CONN_TX;
3675 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3676 auth_data->data, auth_data->data_len,
3677 auth_data->bss->bssid,
3678 auth_data->bss->bssid, NULL, 0, 0,
3683 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3684 auth_data->bss->bssid, auth_data->tries,
3685 IEEE80211_AUTH_MAX_TRIES);
3688 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3694 * Direct probe is sent to broadcast address as some APs
3695 * will not answer to direct packet in unassociated state.
3697 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3698 ssidie + 2, ssidie[1],
3699 NULL, 0, (u32) -1, true, 0,
3700 auth_data->bss->channel, false);
3704 if (tx_flags == 0) {
3705 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3706 auth_data->timeout_started = true;
3707 run_again(sdata, auth_data->timeout);
3709 auth_data->timeout =
3710 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3711 auth_data->timeout_started = true;
3712 run_again(sdata, auth_data->timeout);
3718 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3720 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3721 struct ieee80211_local *local = sdata->local;
3723 sdata_assert_lock(sdata);
3725 assoc_data->tries++;
3726 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3727 sdata_info(sdata, "association with %pM timed out\n",
3728 assoc_data->bss->bssid);
3731 * Most likely AP is not in the range so remove the
3732 * bss struct for that AP.
3734 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3739 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3740 assoc_data->bss->bssid, assoc_data->tries,
3741 IEEE80211_ASSOC_MAX_TRIES);
3742 ieee80211_send_assoc(sdata);
3744 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3745 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3746 assoc_data->timeout_started = true;
3747 run_again(sdata, assoc_data->timeout);
3749 assoc_data->timeout =
3750 round_jiffies_up(jiffies +
3751 IEEE80211_ASSOC_TIMEOUT_LONG);
3752 assoc_data->timeout_started = true;
3753 run_again(sdata, assoc_data->timeout);
3759 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3760 __le16 fc, bool acked)
3762 struct ieee80211_local *local = sdata->local;
3764 sdata->u.mgd.status_fc = fc;
3765 sdata->u.mgd.status_acked = acked;
3766 sdata->u.mgd.status_received = true;
3768 ieee80211_queue_work(&local->hw, &sdata->work);
3771 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3773 struct ieee80211_local *local = sdata->local;
3774 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3778 if (ifmgd->status_received) {
3779 __le16 fc = ifmgd->status_fc;
3780 bool status_acked = ifmgd->status_acked;
3782 ifmgd->status_received = false;
3783 if (ifmgd->auth_data &&
3784 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3786 ifmgd->auth_data->timeout =
3787 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3788 run_again(sdata, ifmgd->auth_data->timeout);
3790 ifmgd->auth_data->timeout = jiffies - 1;
3792 ifmgd->auth_data->timeout_started = true;
3793 } else if (ifmgd->assoc_data &&
3794 (ieee80211_is_assoc_req(fc) ||
3795 ieee80211_is_reassoc_req(fc))) {
3797 ifmgd->assoc_data->timeout =
3798 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3799 run_again(sdata, ifmgd->assoc_data->timeout);
3801 ifmgd->assoc_data->timeout = jiffies - 1;
3803 ifmgd->assoc_data->timeout_started = true;
3807 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3808 time_after(jiffies, ifmgd->auth_data->timeout)) {
3809 if (ifmgd->auth_data->done) {
3811 * ok ... we waited for assoc but userspace didn't,
3812 * so let's just kill the auth data
3814 ieee80211_destroy_auth_data(sdata, false);
3815 } else if (ieee80211_probe_auth(sdata)) {
3817 struct ieee80211_event event = {
3819 .u.mlme.data = AUTH_EVENT,
3820 .u.mlme.status = MLME_TIMEOUT,
3823 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3825 ieee80211_destroy_auth_data(sdata, false);
3827 cfg80211_auth_timeout(sdata->dev, bssid);
3828 drv_event_callback(sdata->local, sdata, &event);
3830 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3831 run_again(sdata, ifmgd->auth_data->timeout);
3833 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3834 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3835 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3836 ieee80211_do_assoc(sdata)) {
3837 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3839 ieee80211_destroy_assoc_data(sdata, false);
3840 cfg80211_assoc_timeout(sdata->dev, bss);
3842 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3843 run_again(sdata, ifmgd->assoc_data->timeout);
3845 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3846 ifmgd->associated) {
3850 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3852 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3853 max_tries = max_nullfunc_tries;
3855 max_tries = max_probe_tries;
3857 /* ACK received for nullfunc probing frame */
3858 if (!ifmgd->probe_send_count)
3859 ieee80211_reset_ap_probe(sdata);
3860 else if (ifmgd->nullfunc_failed) {
3861 if (ifmgd->probe_send_count < max_tries) {
3863 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3864 bssid, ifmgd->probe_send_count,
3866 ieee80211_mgd_probe_ap_send(sdata);
3869 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3871 ieee80211_sta_connection_lost(sdata, bssid,
3872 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3875 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3876 run_again(sdata, ifmgd->probe_timeout);
3877 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3879 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3880 bssid, probe_wait_ms);
3881 ieee80211_sta_connection_lost(sdata, bssid,
3882 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3883 } else if (ifmgd->probe_send_count < max_tries) {
3885 "No probe response from AP %pM after %dms, try %d/%i\n",
3886 bssid, probe_wait_ms,
3887 ifmgd->probe_send_count, max_tries);
3888 ieee80211_mgd_probe_ap_send(sdata);
3891 * We actually lost the connection ... or did we?
3894 wiphy_debug(local->hw.wiphy,
3895 "%s: No probe response from AP %pM"
3896 " after %dms, disconnecting.\n",
3898 bssid, probe_wait_ms);
3900 ieee80211_sta_connection_lost(sdata, bssid,
3901 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3905 sdata_unlock(sdata);
3908 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3910 struct ieee80211_sub_if_data *sdata =
3911 (struct ieee80211_sub_if_data *) data;
3912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3914 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3917 sdata->u.mgd.connection_loss = false;
3918 ieee80211_queue_work(&sdata->local->hw,
3919 &sdata->u.mgd.beacon_connection_loss_work);
3922 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3924 struct ieee80211_sub_if_data *sdata =
3925 (struct ieee80211_sub_if_data *) data;
3926 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3927 struct ieee80211_local *local = sdata->local;
3929 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3932 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3935 static void ieee80211_sta_monitor_work(struct work_struct *work)
3937 struct ieee80211_sub_if_data *sdata =
3938 container_of(work, struct ieee80211_sub_if_data,
3939 u.mgd.monitor_work);
3941 ieee80211_mgd_probe_ap(sdata, false);
3944 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3948 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3949 __ieee80211_stop_poll(sdata);
3951 /* let's probe the connection once */
3952 flags = sdata->local->hw.flags;
3953 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3954 ieee80211_queue_work(&sdata->local->hw,
3955 &sdata->u.mgd.monitor_work);
3956 /* and do all the other regular work too */
3957 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3962 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3964 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3965 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3969 if (ifmgd->auth_data || ifmgd->assoc_data) {
3970 const u8 *bssid = ifmgd->auth_data ?
3971 ifmgd->auth_data->bss->bssid :
3972 ifmgd->assoc_data->bss->bssid;
3975 * If we are trying to authenticate / associate while suspending,
3976 * cfg80211 won't know and won't actually abort those attempts,
3977 * thus we need to do that ourselves.
3979 ieee80211_send_deauth_disassoc(sdata, bssid,
3980 IEEE80211_STYPE_DEAUTH,
3981 WLAN_REASON_DEAUTH_LEAVING,
3983 if (ifmgd->assoc_data)
3984 ieee80211_destroy_assoc_data(sdata, false);
3985 if (ifmgd->auth_data)
3986 ieee80211_destroy_auth_data(sdata, false);
3987 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3988 IEEE80211_DEAUTH_FRAME_LEN);
3991 /* This is a bit of a hack - we should find a better and more generic
3992 * solution to this. Normally when suspending, cfg80211 will in fact
3993 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
3994 * auth (not so important) or assoc (this is the problem) process.
3996 * As a consequence, it can happen that we are in the process of both
3997 * associating and suspending, and receive an association response
3998 * after cfg80211 has checked if it needs to disconnect, but before
3999 * we actually set the flag to drop incoming frames. This will then
4000 * cause the workqueue flush to process the association response in
4001 * the suspend, resulting in a successful association just before it
4002 * tries to remove the interface from the driver, which now though
4003 * has a channel context assigned ... this results in issues.
4005 * To work around this (for now) simply deauth here again if we're
4008 if (ifmgd->associated && !sdata->local->wowlan) {
4010 struct cfg80211_deauth_request req = {
4011 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4015 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4016 ieee80211_mgd_deauth(sdata, &req);
4019 sdata_unlock(sdata);
4022 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4027 if (!ifmgd->associated) {
4028 sdata_unlock(sdata);
4032 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4033 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4034 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4035 ieee80211_sta_connection_lost(sdata,
4036 ifmgd->associated->bssid,
4037 WLAN_REASON_UNSPECIFIED,
4039 sdata_unlock(sdata);
4042 sdata_unlock(sdata);
4046 /* interface setup */
4047 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4049 struct ieee80211_if_managed *ifmgd;
4051 ifmgd = &sdata->u.mgd;
4052 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4053 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4054 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4055 ieee80211_beacon_connection_loss_work);
4056 INIT_WORK(&ifmgd->csa_connection_drop_work,
4057 ieee80211_csa_connection_drop_work);
4058 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4059 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4060 ieee80211_tdls_peer_del_work);
4061 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4062 (unsigned long) sdata);
4063 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4064 (unsigned long) sdata);
4065 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4066 (unsigned long) sdata);
4067 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4068 (unsigned long) sdata);
4069 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4070 ieee80211_sta_handle_tspec_ac_params_wk);
4073 ifmgd->powersave = sdata->wdev.ps;
4074 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4075 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4076 ifmgd->p2p_noa_index = -1;
4078 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4079 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4081 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4083 /* Setup TDLS data */
4084 spin_lock_init(&ifmgd->teardown_lock);
4085 ifmgd->teardown_skb = NULL;
4086 ifmgd->orig_teardown_skb = NULL;
4089 /* scan finished notification */
4090 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4092 struct ieee80211_sub_if_data *sdata;
4094 /* Restart STA timers */
4096 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4097 if (ieee80211_sdata_running(sdata))
4098 ieee80211_restart_sta_timer(sdata);
4103 int ieee80211_max_network_latency(struct notifier_block *nb,
4104 unsigned long data, void *dummy)
4106 s32 latency_usec = (s32) data;
4107 struct ieee80211_local *local =
4108 container_of(nb, struct ieee80211_local,
4109 network_latency_notifier);
4111 mutex_lock(&local->iflist_mtx);
4112 ieee80211_recalc_ps(local, latency_usec);
4113 mutex_unlock(&local->iflist_mtx);
4118 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4119 struct cfg80211_bss *cbss)
4121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4122 const u8 *ht_cap_ie, *vht_cap_ie;
4123 const struct ieee80211_ht_cap *ht_cap;
4124 const struct ieee80211_vht_cap *vht_cap;
4127 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4130 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4131 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4132 ht_cap = (void *)(ht_cap_ie + 2);
4133 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4135 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4136 * "Tx Unequal Modulation Supported" fields.
4140 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4143 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4144 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4148 vht_cap = (void *)(vht_cap_ie + 2);
4149 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4150 for (nss = 8; nss > 0; nss--) {
4151 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4152 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4155 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4156 chains = max(chains, nss);
4162 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4163 struct cfg80211_bss *cbss)
4165 struct ieee80211_local *local = sdata->local;
4166 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4167 const struct ieee80211_ht_cap *ht_cap = NULL;
4168 const struct ieee80211_ht_operation *ht_oper = NULL;
4169 const struct ieee80211_vht_operation *vht_oper = NULL;
4170 struct ieee80211_supported_band *sband;
4171 struct cfg80211_chan_def chandef;
4174 sband = local->hw.wiphy->bands[cbss->channel->band];
4176 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4177 IEEE80211_STA_DISABLE_80P80MHZ |
4178 IEEE80211_STA_DISABLE_160MHZ);
4182 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4183 sband->ht_cap.ht_supported) {
4184 const u8 *ht_oper_ie, *ht_cap_ie;
4186 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4187 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4188 ht_oper = (void *)(ht_oper_ie + 2);
4190 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4191 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4192 ht_cap = (void *)(ht_cap_ie + 2);
4195 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4200 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4201 sband->vht_cap.vht_supported) {
4202 const u8 *vht_oper_ie, *vht_cap;
4204 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4205 WLAN_EID_VHT_OPERATION);
4206 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4207 vht_oper = (void *)(vht_oper_ie + 2);
4208 if (vht_oper && !ht_oper) {
4211 "AP advertised VHT without HT, disabling both\n");
4212 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4213 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4216 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4217 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4218 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4223 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4225 ht_cap, ht_oper, vht_oper,
4228 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4233 /* will change later if needed */
4234 sdata->smps_mode = IEEE80211_SMPS_OFF;
4236 mutex_lock(&local->mtx);
4238 * If this fails (possibly due to channel context sharing
4239 * on incompatible channels, e.g. 80+80 and 160 sharing the
4240 * same control channel) try to use a smaller bandwidth.
4242 ret = ieee80211_vif_use_channel(sdata, &chandef,
4243 IEEE80211_CHANCTX_SHARED);
4245 /* don't downgrade for 5 and 10 MHz channels, though. */
4246 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4247 chandef.width == NL80211_CHAN_WIDTH_10)
4250 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4251 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4252 ret = ieee80211_vif_use_channel(sdata, &chandef,
4253 IEEE80211_CHANCTX_SHARED);
4256 mutex_unlock(&local->mtx);
4260 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4261 struct cfg80211_bss *cbss, bool assoc)
4263 struct ieee80211_local *local = sdata->local;
4264 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4265 struct ieee80211_bss *bss = (void *)cbss->priv;
4266 struct sta_info *new_sta = NULL;
4267 struct ieee80211_supported_band *sband;
4268 struct ieee80211_sta_ht_cap sta_ht_cap;
4269 bool have_sta = false, is_override = false;
4272 sband = local->hw.wiphy->bands[cbss->channel->band];
4274 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4279 have_sta = sta_info_get(sdata, cbss->bssid);
4284 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4289 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4290 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4292 is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
4293 (sband->ht_cap.cap &
4294 IEEE80211_HT_CAP_SUP_WIDTH_20_40);
4296 if (new_sta || is_override) {
4297 err = ieee80211_prep_channel(sdata, cbss);
4300 sta_info_free(local, new_sta);
4306 u32 rates = 0, basic_rates = 0;
4307 bool have_higher_than_11mbit;
4308 int min_rate = INT_MAX, min_rate_index = -1;
4309 struct ieee80211_chanctx_conf *chanctx_conf;
4310 const struct cfg80211_bss_ies *ies;
4311 int shift = ieee80211_vif_get_shift(&sdata->vif);
4315 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4316 if (WARN_ON(!chanctx_conf)) {
4318 sta_info_free(local, new_sta);
4321 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4324 ieee80211_get_rates(sband, bss->supp_rates,
4325 bss->supp_rates_len,
4326 &rates, &basic_rates,
4327 &have_higher_than_11mbit,
4328 &min_rate, &min_rate_index,
4332 * This used to be a workaround for basic rates missing
4333 * in the association response frame. Now that we no
4334 * longer use the basic rates from there, it probably
4335 * doesn't happen any more, but keep the workaround so
4336 * in case some *other* APs are buggy in different ways
4337 * we can connect -- with a warning.
4339 if (!basic_rates && min_rate_index >= 0) {
4341 "No basic rates, using min rate instead\n");
4342 basic_rates = BIT(min_rate_index);
4345 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4346 sdata->vif.bss_conf.basic_rates = basic_rates;
4348 /* cf. IEEE 802.11 9.2.12 */
4349 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4350 have_higher_than_11mbit)
4351 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4353 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4355 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4357 /* set timing information */
4358 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4360 ies = rcu_dereference(cbss->beacon_ies);
4364 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4365 sdata->vif.bss_conf.sync_device_ts =
4366 bss->device_ts_beacon;
4367 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4368 ies->data, ies->len);
4369 if (tim_ie && tim_ie[1] >= 2)
4370 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4372 sdata->vif.bss_conf.sync_dtim_count = 0;
4373 } else if (!(local->hw.flags &
4374 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4375 ies = rcu_dereference(cbss->proberesp_ies);
4376 /* must be non-NULL since beacon IEs were NULL */
4377 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4378 sdata->vif.bss_conf.sync_device_ts =
4379 bss->device_ts_presp;
4380 sdata->vif.bss_conf.sync_dtim_count = 0;
4382 sdata->vif.bss_conf.sync_tsf = 0;
4383 sdata->vif.bss_conf.sync_device_ts = 0;
4384 sdata->vif.bss_conf.sync_dtim_count = 0;
4388 /* tell driver about BSSID, basic rates and timing */
4389 ieee80211_bss_info_change_notify(sdata,
4390 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4391 BSS_CHANGED_BEACON_INT);
4394 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4396 err = sta_info_insert(new_sta);
4400 "failed to insert STA entry for the AP (error %d)\n",
4405 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4411 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4412 struct cfg80211_auth_request *req)
4414 struct ieee80211_local *local = sdata->local;
4415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4416 struct ieee80211_mgd_auth_data *auth_data;
4420 /* prepare auth data structure */
4422 switch (req->auth_type) {
4423 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4424 auth_alg = WLAN_AUTH_OPEN;
4426 case NL80211_AUTHTYPE_SHARED_KEY:
4427 if (IS_ERR(local->wep_tx_tfm))
4429 auth_alg = WLAN_AUTH_SHARED_KEY;
4431 case NL80211_AUTHTYPE_FT:
4432 auth_alg = WLAN_AUTH_FT;
4434 case NL80211_AUTHTYPE_NETWORK_EAP:
4435 auth_alg = WLAN_AUTH_LEAP;
4437 case NL80211_AUTHTYPE_SAE:
4438 auth_alg = WLAN_AUTH_SAE;
4444 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4445 req->ie_len, GFP_KERNEL);
4449 auth_data->bss = req->bss;
4451 if (req->sae_data_len >= 4) {
4452 __le16 *pos = (__le16 *) req->sae_data;
4453 auth_data->sae_trans = le16_to_cpu(pos[0]);
4454 auth_data->sae_status = le16_to_cpu(pos[1]);
4455 memcpy(auth_data->data, req->sae_data + 4,
4456 req->sae_data_len - 4);
4457 auth_data->data_len += req->sae_data_len - 4;
4460 if (req->ie && req->ie_len) {
4461 memcpy(&auth_data->data[auth_data->data_len],
4462 req->ie, req->ie_len);
4463 auth_data->data_len += req->ie_len;
4466 if (req->key && req->key_len) {
4467 auth_data->key_len = req->key_len;
4468 auth_data->key_idx = req->key_idx;
4469 memcpy(auth_data->key, req->key, req->key_len);
4472 auth_data->algorithm = auth_alg;
4474 /* try to authenticate/probe */
4476 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4477 ifmgd->assoc_data) {
4482 if (ifmgd->auth_data)
4483 ieee80211_destroy_auth_data(sdata, false);
4485 /* prep auth_data so we don't go into idle on disassoc */
4486 ifmgd->auth_data = auth_data;
4488 if (ifmgd->associated) {
4489 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4491 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4492 WLAN_REASON_UNSPECIFIED,
4495 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4499 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4501 err = ieee80211_prep_connection(sdata, req->bss, false);
4505 err = ieee80211_probe_auth(sdata);
4507 sta_info_destroy_addr(sdata, req->bss->bssid);
4511 /* hold our own reference */
4512 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4516 memset(ifmgd->bssid, 0, ETH_ALEN);
4517 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4518 ifmgd->auth_data = NULL;
4524 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4525 const u8 *wmm_param, int len)
4533 if (wmm_param[5] != 1 /* version */)
4536 pos = wmm_param + 8;
4539 for (; left >= 4; left -= 4, pos += 4) {
4540 u8 aifsn = pos[0] & 0x0f;
4541 u8 ecwmin = pos[1] & 0x0f;
4542 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4543 int aci = (pos[0] >> 5) & 0x03;
4547 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4551 if (ecwmin > ecwmax) {
4553 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4554 ecwmin, ecwmax, aci);
4562 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4563 struct cfg80211_assoc_request *req)
4565 struct ieee80211_local *local = sdata->local;
4566 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4567 struct ieee80211_bss *bss = (void *)req->bss->priv;
4568 struct ieee80211_mgd_assoc_data *assoc_data;
4569 const struct cfg80211_bss_ies *beacon_ies;
4570 struct ieee80211_supported_band *sband;
4571 const u8 *ssidie, *ht_ie, *vht_ie;
4574 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4579 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4585 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4586 assoc_data->ssid_len = ssidie[1];
4589 if (ifmgd->associated) {
4590 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4592 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4593 WLAN_REASON_UNSPECIFIED,
4596 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4600 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4605 if (ifmgd->assoc_data) {
4610 if (ifmgd->auth_data) {
4613 /* keep sta info, bssid if matching */
4614 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4615 ieee80211_destroy_auth_data(sdata, match);
4618 /* prepare assoc data */
4620 ifmgd->beacon_crc_valid = false;
4622 assoc_data->wmm = bss->wmm_used &&
4623 (local->hw.queues >= IEEE80211_NUM_ACS);
4624 if (assoc_data->wmm) {
4625 /* try to check validity of WMM params IE */
4626 const struct cfg80211_bss_ies *ies;
4627 const u8 *wp, *start, *end;
4630 ies = rcu_dereference(req->bss->ies);
4632 end = start + ies->len;
4635 wp = cfg80211_find_vendor_ie(
4637 WLAN_OUI_TYPE_MICROSOFT_WMM,
4638 start, end - start);
4641 start = wp + wp[1] + 2;
4642 /* if this IE is too short, try the next */
4645 /* if this IE is WMM params, we found what we wanted */
4650 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4652 assoc_data->wmm = false;
4653 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4659 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4660 * We still associate in non-HT mode (11a/b/g) if any one of these
4661 * ciphers is configured as pairwise.
4662 * We can set this to true for non-11n hardware, that'll be checked
4663 * separately along with the peer capabilities.
4665 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4666 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4667 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4668 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4669 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4670 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4671 netdev_info(sdata->dev,
4672 "disabling HT/VHT due to WEP/TKIP use\n");
4676 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4677 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4678 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4681 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4682 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4684 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4685 sband = local->hw.wiphy->bands[req->bss->channel->band];
4686 if (!sband->ht_cap.ht_supported ||
4687 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4688 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4689 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4690 if (!bss->wmm_used &&
4691 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4692 netdev_info(sdata->dev,
4693 "disabling HT as WMM/QoS is not supported by the AP\n");
4696 /* disable VHT if we don't support it or the AP doesn't use WMM */
4697 if (!sband->vht_cap.vht_supported ||
4698 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4699 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4700 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4701 if (!bss->wmm_used &&
4702 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4703 netdev_info(sdata->dev,
4704 "disabling VHT as WMM/QoS is not supported by the AP\n");
4707 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4708 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4709 sizeof(ifmgd->ht_capa_mask));
4711 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4712 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4713 sizeof(ifmgd->vht_capa_mask));
4715 if (req->ie && req->ie_len) {
4716 memcpy(assoc_data->ie, req->ie, req->ie_len);
4717 assoc_data->ie_len = req->ie_len;
4720 assoc_data->bss = req->bss;
4722 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4723 if (ifmgd->powersave)
4724 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4726 sdata->smps_mode = IEEE80211_SMPS_OFF;
4728 sdata->smps_mode = ifmgd->req_smps;
4730 assoc_data->capability = req->bss->capability;
4731 assoc_data->supp_rates = bss->supp_rates;
4732 assoc_data->supp_rates_len = bss->supp_rates_len;
4735 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4736 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4737 assoc_data->ap_ht_param =
4738 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4740 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4741 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4742 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4743 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4744 sizeof(struct ieee80211_vht_cap));
4746 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4749 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4750 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4751 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4752 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4754 if (bss->wmm_used && bss->uapsd_supported &&
4755 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4756 assoc_data->uapsd = true;
4757 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4759 assoc_data->uapsd = false;
4760 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4763 if (req->prev_bssid)
4764 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4767 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4768 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4770 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4771 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4774 if (req->flags & ASSOC_REQ_USE_RRM)
4775 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4777 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4779 if (req->crypto.control_port)
4780 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4782 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4784 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4785 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4786 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4789 /* kick off associate process */
4791 ifmgd->assoc_data = assoc_data;
4792 ifmgd->dtim_period = 0;
4793 ifmgd->have_beacon = false;
4795 err = ieee80211_prep_connection(sdata, req->bss, true);
4800 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4802 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4805 * Wait up to one beacon interval ...
4806 * should this be more if we miss one?
4808 sdata_info(sdata, "waiting for beacon from %pM\n",
4810 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4811 assoc_data->timeout_started = true;
4812 assoc_data->need_beacon = true;
4813 } else if (beacon_ies) {
4814 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4819 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4820 const struct ieee80211_tim_ie *tim;
4821 tim = (void *)(tim_ie + 2);
4822 ifmgd->dtim_period = tim->dtim_period;
4823 dtim_count = tim->dtim_count;
4825 ifmgd->have_beacon = true;
4826 assoc_data->timeout = jiffies;
4827 assoc_data->timeout_started = true;
4829 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4830 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4831 sdata->vif.bss_conf.sync_device_ts =
4832 bss->device_ts_beacon;
4833 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4836 assoc_data->timeout = jiffies;
4837 assoc_data->timeout_started = true;
4841 run_again(sdata, assoc_data->timeout);
4843 if (bss->corrupt_data) {
4844 char *corrupt_type = "data";
4845 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4846 if (bss->corrupt_data &
4847 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4848 corrupt_type = "beacon and probe response";
4850 corrupt_type = "beacon";
4851 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4852 corrupt_type = "probe response";
4853 sdata_info(sdata, "associating with AP with corrupt %s\n",
4859 memset(ifmgd->bssid, 0, ETH_ALEN);
4860 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4861 ifmgd->assoc_data = NULL;
4867 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4868 struct cfg80211_deauth_request *req)
4870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4871 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4872 bool tx = !req->local_state_change;
4874 if (ifmgd->auth_data &&
4875 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4877 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4878 req->bssid, req->reason_code,
4879 ieee80211_get_reason_code_string(req->reason_code));
4881 drv_mgd_prepare_tx(sdata->local, sdata);
4882 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4883 IEEE80211_STYPE_DEAUTH,
4884 req->reason_code, tx,
4886 ieee80211_destroy_auth_data(sdata, false);
4887 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4888 IEEE80211_DEAUTH_FRAME_LEN);
4893 if (ifmgd->associated &&
4894 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4896 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4897 req->bssid, req->reason_code,
4898 ieee80211_get_reason_code_string(req->reason_code));
4900 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4901 req->reason_code, tx, frame_buf);
4902 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4903 IEEE80211_DEAUTH_FRAME_LEN);
4910 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4911 struct cfg80211_disassoc_request *req)
4913 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4915 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4918 * cfg80211 should catch this ... but it's racy since
4919 * we can receive a disassoc frame, process it, hand it
4920 * to cfg80211 while that's in a locked section already
4921 * trying to tell us that the user wants to disconnect.
4923 if (ifmgd->associated != req->bss)
4927 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4928 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4930 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4931 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4932 req->reason_code, !req->local_state_change,
4935 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4936 IEEE80211_DEAUTH_FRAME_LEN);
4941 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4943 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4946 * Make sure some work items will not run after this,
4947 * they will not do anything but might not have been
4948 * cancelled when disconnecting.
4950 cancel_work_sync(&ifmgd->monitor_work);
4951 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4952 cancel_work_sync(&ifmgd->request_smps_work);
4953 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4954 cancel_work_sync(&ifmgd->chswitch_work);
4955 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4958 if (ifmgd->assoc_data) {
4959 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4960 ieee80211_destroy_assoc_data(sdata, false);
4961 cfg80211_assoc_timeout(sdata->dev, bss);
4963 if (ifmgd->auth_data)
4964 ieee80211_destroy_auth_data(sdata, false);
4965 spin_lock_bh(&ifmgd->teardown_lock);
4966 if (ifmgd->teardown_skb) {
4967 kfree_skb(ifmgd->teardown_skb);
4968 ifmgd->teardown_skb = NULL;
4969 ifmgd->orig_teardown_skb = NULL;
4971 spin_unlock_bh(&ifmgd->teardown_lock);
4972 del_timer_sync(&ifmgd->timer);
4973 sdata_unlock(sdata);
4976 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4977 enum nl80211_cqm_rssi_threshold_event rssi_event,
4980 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4982 trace_api_cqm_rssi_notify(sdata, rssi_event);
4984 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4986 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
4988 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4990 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4992 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
4994 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
4996 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);