2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_MAX_TRIES 3
35 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37 #define IEEE80211_ASSOC_MAX_TRIES 3
39 static int max_nullfunc_tries = 2;
40 module_param(max_nullfunc_tries, int, 0644);
41 MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
44 static int max_probe_tries = 5;
45 module_param(max_probe_tries, int, 0644);
46 MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
57 #define IEEE80211_BEACON_LOSS_COUNT 7
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
63 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
69 static int probe_wait_ms = 500;
70 module_param(probe_wait_ms, int, 0644);
71 MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
80 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
86 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88 #define TMR_RUNNING_TIMER 0
89 #define TMR_RUNNING_CHANSW 1
92 * All cfg80211 functions have to be called outside a locked
93 * section so that they can acquire a lock themselves... This
94 * is much simpler than queuing up things in cfg80211, but we
95 * do need some indirection for that here.
98 /* no action required */
101 /* caller must call cfg80211_send_deauth() */
102 RX_MGMT_CFG80211_DEAUTH,
104 /* caller must call cfg80211_send_disassoc() */
105 RX_MGMT_CFG80211_DISASSOC,
107 /* caller must call cfg80211_send_rx_auth() */
108 RX_MGMT_CFG80211_RX_AUTH,
110 /* caller must call cfg80211_send_rx_assoc() */
111 RX_MGMT_CFG80211_RX_ASSOC,
113 /* caller must call cfg80211_send_assoc_timeout() */
114 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
118 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
120 lockdep_assert_held(&ifmgd->mtx);
124 * We can have multiple work items (and connection probing)
125 * scheduling this timer, but we need to take care to only
126 * reschedule it when it should fire _earlier_ than it was
127 * asked for before, or if it's not pending right now. This
128 * function ensures that. Note that it then is required to
129 * run this function for all timeouts after the first one
130 * has happened -- the work that runs from this timer will
133 static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
135 ASSERT_MGD_MTX(ifmgd);
137 if (!timer_pending(&ifmgd->timer) ||
138 time_before(timeout, ifmgd->timer.expires))
139 mod_timer(&ifmgd->timer, timeout);
142 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
144 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
147 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
150 mod_timer(&sdata->u.mgd.bcn_mon_timer,
151 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
154 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
158 if (unlikely(!sdata->u.mgd.associated))
161 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
164 mod_timer(&sdata->u.mgd.conn_mon_timer,
165 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
167 ifmgd->probe_send_count = 0;
170 static int ecw2cw(int ecw)
172 return (1 << ecw) - 1;
175 static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
176 struct ieee80211_ht_operation *ht_oper,
177 const u8 *bssid, bool reconfig)
179 struct ieee80211_local *local = sdata->local;
180 struct ieee80211_supported_band *sband;
181 struct ieee80211_chanctx_conf *chanctx_conf;
182 struct ieee80211_channel *chan;
183 struct sta_info *sta;
186 bool disable_40 = false;
189 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
190 if (WARN_ON(!chanctx_conf)) {
194 chan = chanctx_conf->def.chan;
196 sband = local->hw.wiphy->bands[chan->band];
198 switch (sdata->vif.bss_conf.chandef.width) {
199 case NL80211_CHAN_WIDTH_40:
200 if (sdata->vif.bss_conf.chandef.chan->center_freq >
201 sdata->vif.bss_conf.chandef.center_freq1 &&
202 chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
204 if (sdata->vif.bss_conf.chandef.chan->center_freq <
205 sdata->vif.bss_conf.chandef.center_freq1 &&
206 chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
213 /* This can change during the lifetime of the BSS */
214 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
217 mutex_lock(&local->sta_mtx);
218 sta = sta_info_get(sdata, bssid);
222 if (sta && !sta->supports_40mhz)
225 if (sta && (!reconfig ||
226 (disable_40 != !(sta->sta.ht_cap.cap &
227 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
230 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
232 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
234 rate_control_rate_update(local, sband, sta,
235 IEEE80211_RC_BW_CHANGED);
237 mutex_unlock(&local->sta_mtx);
239 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
241 /* if bss configuration changed store the new one */
242 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
243 changed |= BSS_CHANGED_HT;
244 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
250 /* frame sending functions */
252 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
253 struct ieee80211_supported_band *sband,
259 for (i = 0; i < supp_rates_len; i++) {
260 int rate = (supp_rates[i] & 0x7F) * 5;
262 for (j = 0; j < sband->n_bitrates; j++)
263 if (sband->bitrates[j].bitrate == rate) {
273 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
274 struct sk_buff *skb, u8 ap_ht_param,
275 struct ieee80211_supported_band *sband,
276 struct ieee80211_channel *channel,
277 enum ieee80211_smps_mode smps)
280 u32 flags = channel->flags;
282 struct ieee80211_sta_ht_cap ht_cap;
284 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
286 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
287 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
289 /* determine capability flags */
292 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
293 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
294 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
295 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
296 cap &= ~IEEE80211_HT_CAP_SGI_40;
299 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
300 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
301 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
302 cap &= ~IEEE80211_HT_CAP_SGI_40;
308 * If 40 MHz was disabled associate as though we weren't
309 * capable of 40 MHz -- some broken APs will never fall
310 * back to trying to transmit in 20 MHz.
312 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
313 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
314 cap &= ~IEEE80211_HT_CAP_SGI_40;
317 /* set SM PS mode properly */
318 cap &= ~IEEE80211_HT_CAP_SM_PS;
320 case IEEE80211_SMPS_AUTOMATIC:
321 case IEEE80211_SMPS_NUM_MODES:
323 case IEEE80211_SMPS_OFF:
324 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
325 IEEE80211_HT_CAP_SM_PS_SHIFT;
327 case IEEE80211_SMPS_STATIC:
328 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
329 IEEE80211_HT_CAP_SM_PS_SHIFT;
331 case IEEE80211_SMPS_DYNAMIC:
332 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
333 IEEE80211_HT_CAP_SM_PS_SHIFT;
337 /* reserve and fill IE */
338 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
339 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
342 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
344 struct ieee80211_supported_band *sband,
345 struct ieee80211_vht_cap *ap_vht_cap)
349 struct ieee80211_sta_vht_cap vht_cap;
352 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
354 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
356 /* determine capability flags */
359 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
360 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
361 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
364 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
365 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
366 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
370 * Some APs apparently get confused if our capabilities are better
371 * than theirs, so restrict what we advertise in the assoc request.
373 if (!(ap_vht_cap->vht_cap_info &
374 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
375 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
377 if (!(ap_vht_cap->vht_cap_info &
378 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
379 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
380 IEEE80211_VHT_CAP_RXSTBC_3 |
381 IEEE80211_VHT_CAP_RXSTBC_4);
383 for (i = 0; i < 8; i++) {
385 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
388 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
390 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
395 if (our_mcs <= ap_mcs)
398 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
399 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
400 vht_cap.vht_mcs.rx_mcs_map |=
401 cpu_to_le16(ap_mcs << shift);
405 /* reserve and fill IE */
406 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
407 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
410 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
412 struct ieee80211_local *local = sdata->local;
413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
414 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
416 struct ieee80211_mgmt *mgmt;
418 size_t offset = 0, noffset;
419 int i, count, rates_len, supp_rates_len;
421 struct ieee80211_supported_band *sband;
422 struct ieee80211_chanctx_conf *chanctx_conf;
423 struct ieee80211_channel *chan;
426 lockdep_assert_held(&ifmgd->mtx);
429 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
430 if (WARN_ON(!chanctx_conf)) {
434 chan = chanctx_conf->def.chan;
436 sband = local->hw.wiphy->bands[chan->band];
438 if (assoc_data->supp_rates_len) {
440 * Get all rates supported by the device and the AP as
441 * some APs don't like getting a superset of their rates
442 * in the association request (e.g. D-Link DAP 1353 in
445 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
446 assoc_data->supp_rates_len,
450 * In case AP not provide any supported rates information
451 * before association, we send information element(s) with
452 * all rates that we support.
455 rates_len = sband->n_bitrates;
458 skb = alloc_skb(local->hw.extra_tx_headroom +
459 sizeof(*mgmt) + /* bit too much but doesn't matter */
460 2 + assoc_data->ssid_len + /* SSID */
461 4 + rates_len + /* (extended) rates */
462 4 + /* power capability */
463 2 + 2 * sband->n_channels + /* supported channels */
464 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
465 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
466 assoc_data->ie_len + /* extra IEs */
472 skb_reserve(skb, local->hw.extra_tx_headroom);
474 capab = WLAN_CAPABILITY_ESS;
476 if (sband->band == IEEE80211_BAND_2GHZ) {
477 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
478 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
479 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
480 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
483 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
484 capab |= WLAN_CAPABILITY_PRIVACY;
486 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
487 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
488 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
490 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
492 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
493 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
494 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
496 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
498 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
499 IEEE80211_STYPE_REASSOC_REQ);
500 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
501 mgmt->u.reassoc_req.listen_interval =
502 cpu_to_le16(local->hw.conf.listen_interval);
503 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
507 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
508 IEEE80211_STYPE_ASSOC_REQ);
509 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
510 mgmt->u.assoc_req.listen_interval =
511 cpu_to_le16(local->hw.conf.listen_interval);
515 pos = skb_put(skb, 2 + assoc_data->ssid_len);
516 *pos++ = WLAN_EID_SSID;
517 *pos++ = assoc_data->ssid_len;
518 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
520 /* add all rates which were marked to be used above */
521 supp_rates_len = rates_len;
522 if (supp_rates_len > 8)
525 pos = skb_put(skb, supp_rates_len + 2);
526 *pos++ = WLAN_EID_SUPP_RATES;
527 *pos++ = supp_rates_len;
530 for (i = 0; i < sband->n_bitrates; i++) {
531 if (BIT(i) & rates) {
532 int rate = sband->bitrates[i].bitrate;
533 *pos++ = (u8) (rate / 5);
539 if (rates_len > count) {
540 pos = skb_put(skb, rates_len - count + 2);
541 *pos++ = WLAN_EID_EXT_SUPP_RATES;
542 *pos++ = rates_len - count;
544 for (i++; i < sband->n_bitrates; i++) {
545 if (BIT(i) & rates) {
546 int rate = sband->bitrates[i].bitrate;
547 *pos++ = (u8) (rate / 5);
552 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
553 /* 1. power capabilities */
554 pos = skb_put(skb, 4);
555 *pos++ = WLAN_EID_PWR_CAPABILITY;
557 *pos++ = 0; /* min tx power */
558 *pos++ = chan->max_power; /* max tx power */
560 /* 2. supported channels */
561 /* TODO: get this in reg domain format */
562 pos = skb_put(skb, 2 * sband->n_channels + 2);
563 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
564 *pos++ = 2 * sband->n_channels;
565 for (i = 0; i < sband->n_channels; i++) {
566 *pos++ = ieee80211_frequency_to_channel(
567 sband->channels[i].center_freq);
568 *pos++ = 1; /* one channel in the subband*/
572 /* if present, add any custom IEs that go before HT */
573 if (assoc_data->ie_len && assoc_data->ie) {
574 static const u8 before_ht[] = {
577 WLAN_EID_EXT_SUPP_RATES,
578 WLAN_EID_PWR_CAPABILITY,
579 WLAN_EID_SUPPORTED_CHANNELS,
582 WLAN_EID_RRM_ENABLED_CAPABILITIES,
583 WLAN_EID_MOBILITY_DOMAIN,
584 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
586 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
587 before_ht, ARRAY_SIZE(before_ht),
589 pos = skb_put(skb, noffset - offset);
590 memcpy(pos, assoc_data->ie + offset, noffset - offset);
594 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
595 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
596 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
598 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
599 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
600 sband, chan, sdata->smps_mode);
602 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
603 ieee80211_add_vht_ie(sdata, skb, sband,
604 &assoc_data->ap_vht_cap);
606 /* if present, add any custom non-vendor IEs that go after HT */
607 if (assoc_data->ie_len && assoc_data->ie) {
608 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
611 pos = skb_put(skb, noffset - offset);
612 memcpy(pos, assoc_data->ie + offset, noffset - offset);
616 if (assoc_data->wmm) {
617 if (assoc_data->uapsd) {
618 qos_info = ifmgd->uapsd_queues;
619 qos_info |= (ifmgd->uapsd_max_sp_len <<
620 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
625 pos = skb_put(skb, 9);
626 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
627 *pos++ = 7; /* len */
628 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
631 *pos++ = 2; /* WME */
632 *pos++ = 0; /* WME info */
633 *pos++ = 1; /* WME ver */
637 /* add any remaining custom (i.e. vendor specific here) IEs */
638 if (assoc_data->ie_len && assoc_data->ie) {
639 noffset = assoc_data->ie_len;
640 pos = skb_put(skb, noffset - offset);
641 memcpy(pos, assoc_data->ie + offset, noffset - offset);
644 drv_mgd_prepare_tx(local, sdata);
646 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
647 ieee80211_tx_skb(sdata, skb);
650 void ieee80211_send_pspoll(struct ieee80211_local *local,
651 struct ieee80211_sub_if_data *sdata)
653 struct ieee80211_pspoll *pspoll;
656 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
660 pspoll = (struct ieee80211_pspoll *) skb->data;
661 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
663 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
664 ieee80211_tx_skb(sdata, skb);
667 void ieee80211_send_nullfunc(struct ieee80211_local *local,
668 struct ieee80211_sub_if_data *sdata,
672 struct ieee80211_hdr_3addr *nullfunc;
673 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
675 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
679 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
681 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
683 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
684 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
685 IEEE80211_STA_CONNECTION_POLL))
686 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
688 ieee80211_tx_skb(sdata, skb);
691 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
692 struct ieee80211_sub_if_data *sdata)
695 struct ieee80211_hdr *nullfunc;
698 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
701 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
705 skb_reserve(skb, local->hw.extra_tx_headroom);
707 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
708 memset(nullfunc, 0, 30);
709 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
710 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
711 nullfunc->frame_control = fc;
712 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
713 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
714 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
715 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
717 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
718 ieee80211_tx_skb(sdata, skb);
721 /* spectrum management related things */
722 static void ieee80211_chswitch_work(struct work_struct *work)
724 struct ieee80211_sub_if_data *sdata =
725 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
726 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
728 if (!ieee80211_sdata_running(sdata))
731 mutex_lock(&ifmgd->mtx);
732 if (!ifmgd->associated)
735 sdata->local->_oper_channel = sdata->local->csa_channel;
736 if (!sdata->local->ops->channel_switch) {
737 /* call "hw_config" only if doing sw channel switch */
738 ieee80211_hw_config(sdata->local,
739 IEEE80211_CONF_CHANGE_CHANNEL);
741 /* update the device channel directly */
742 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
745 /* XXX: shouldn't really modify cfg80211-owned data! */
746 ifmgd->associated->channel = sdata->local->_oper_channel;
748 /* XXX: wait for a beacon first? */
749 ieee80211_wake_queues_by_reason(&sdata->local->hw,
750 IEEE80211_QUEUE_STOP_REASON_CSA);
752 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
753 mutex_unlock(&ifmgd->mtx);
756 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
758 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
759 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
761 trace_api_chswitch_done(sdata, success);
764 "driver channel switch failed, disconnecting\n");
765 ieee80211_queue_work(&sdata->local->hw,
766 &ifmgd->csa_connection_drop_work);
768 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
771 EXPORT_SYMBOL(ieee80211_chswitch_done);
773 static void ieee80211_chswitch_timer(unsigned long data)
775 struct ieee80211_sub_if_data *sdata =
776 (struct ieee80211_sub_if_data *) data;
777 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
779 if (sdata->local->quiescing) {
780 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
784 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
787 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
788 struct ieee80211_channel_sw_ie *sw_elem,
789 struct ieee80211_bss *bss,
792 struct cfg80211_bss *cbss =
793 container_of((void *)bss, struct cfg80211_bss, priv);
794 struct ieee80211_channel *new_ch;
795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
796 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
797 cbss->channel->band);
798 struct ieee80211_chanctx *chanctx;
800 ASSERT_MGD_MTX(ifmgd);
802 if (!ifmgd->associated)
805 if (sdata->local->scanning)
808 /* Disregard subsequent beacons if we are already running a timer
811 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
814 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
815 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
817 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
818 ifmgd->associated->bssid, new_freq);
819 ieee80211_queue_work(&sdata->local->hw,
820 &ifmgd->csa_connection_drop_work);
824 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
826 if (sdata->local->use_chanctx) {
828 "not handling channel switch with channel contexts\n");
829 ieee80211_queue_work(&sdata->local->hw,
830 &ifmgd->csa_connection_drop_work);
834 mutex_lock(&sdata->local->chanctx_mtx);
835 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
836 mutex_unlock(&sdata->local->chanctx_mtx);
839 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
840 struct ieee80211_chanctx, conf);
841 if (chanctx->refcount > 1) {
843 "channel switch with multiple interfaces on the same channel, disconnecting\n");
844 ieee80211_queue_work(&sdata->local->hw,
845 &ifmgd->csa_connection_drop_work);
846 mutex_unlock(&sdata->local->chanctx_mtx);
849 mutex_unlock(&sdata->local->chanctx_mtx);
851 sdata->local->csa_channel = new_ch;
854 ieee80211_stop_queues_by_reason(&sdata->local->hw,
855 IEEE80211_QUEUE_STOP_REASON_CSA);
857 if (sdata->local->ops->channel_switch) {
858 /* use driver's channel switch callback */
859 struct ieee80211_channel_switch ch_switch = {
860 .timestamp = timestamp,
861 .block_tx = sw_elem->mode,
863 .count = sw_elem->count,
866 drv_channel_switch(sdata->local, &ch_switch);
870 /* channel switch handled in software */
871 if (sw_elem->count <= 1)
872 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
874 mod_timer(&ifmgd->chswitch_timer,
875 TU_TO_EXP_TIME(sw_elem->count *
876 cbss->beacon_interval));
879 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
880 struct ieee80211_channel *channel,
881 const u8 *country_ie, u8 country_ie_len,
882 const u8 *pwr_constr_elem)
884 struct ieee80211_country_ie_triplet *triplet;
885 int chan = ieee80211_frequency_to_channel(channel->center_freq);
886 int i, chan_pwr, chan_increment, new_ap_level;
887 bool have_chan_pwr = false;
890 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
893 triplet = (void *)(country_ie + 3);
896 switch (channel->band) {
900 case IEEE80211_BAND_2GHZ:
901 case IEEE80211_BAND_60GHZ:
904 case IEEE80211_BAND_5GHZ:
910 while (country_ie_len >= 3) {
911 u8 first_channel = triplet->chans.first_channel;
913 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
916 for (i = 0; i < triplet->chans.num_channels; i++) {
917 if (first_channel + i * chan_increment == chan) {
918 have_chan_pwr = true;
919 chan_pwr = triplet->chans.max_power;
934 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
936 if (sdata->ap_power_level == new_ap_level)
940 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
941 new_ap_level, chan_pwr, *pwr_constr_elem,
943 sdata->ap_power_level = new_ap_level;
944 if (__ieee80211_recalc_txpower(sdata))
945 return BSS_CHANGED_TXPOWER;
949 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
951 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
952 struct ieee80211_local *local = sdata->local;
953 struct ieee80211_conf *conf = &local->hw.conf;
955 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
956 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
957 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
959 local->disable_dynamic_ps = false;
960 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
962 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
964 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
966 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
967 struct ieee80211_local *local = sdata->local;
968 struct ieee80211_conf *conf = &local->hw.conf;
970 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
971 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
972 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
974 local->disable_dynamic_ps = true;
975 conf->dynamic_ps_timeout = 0;
976 del_timer_sync(&local->dynamic_ps_timer);
977 ieee80211_queue_work(&local->hw,
978 &local->dynamic_ps_enable_work);
980 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
983 static void ieee80211_enable_ps(struct ieee80211_local *local,
984 struct ieee80211_sub_if_data *sdata)
986 struct ieee80211_conf *conf = &local->hw.conf;
989 * If we are scanning right now then the parameters will
990 * take effect when scan finishes.
995 if (conf->dynamic_ps_timeout > 0 &&
996 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
997 mod_timer(&local->dynamic_ps_timer, jiffies +
998 msecs_to_jiffies(conf->dynamic_ps_timeout));
1000 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1001 ieee80211_send_nullfunc(local, sdata, 1);
1003 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1004 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1007 conf->flags |= IEEE80211_CONF_PS;
1008 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1012 static void ieee80211_change_ps(struct ieee80211_local *local)
1014 struct ieee80211_conf *conf = &local->hw.conf;
1016 if (local->ps_sdata) {
1017 ieee80211_enable_ps(local, local->ps_sdata);
1018 } else if (conf->flags & IEEE80211_CONF_PS) {
1019 conf->flags &= ~IEEE80211_CONF_PS;
1020 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1021 del_timer_sync(&local->dynamic_ps_timer);
1022 cancel_work_sync(&local->dynamic_ps_enable_work);
1026 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1028 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1029 struct sta_info *sta = NULL;
1030 bool authorized = false;
1032 if (!mgd->powersave)
1038 if (!mgd->associated)
1041 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1042 IEEE80211_STA_CONNECTION_POLL))
1046 sta = sta_info_get(sdata, mgd->bssid);
1048 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1054 /* need to hold RTNL or interface lock */
1055 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1057 struct ieee80211_sub_if_data *sdata, *found = NULL;
1061 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1062 local->ps_sdata = NULL;
1066 list_for_each_entry(sdata, &local->interfaces, list) {
1067 if (!ieee80211_sdata_running(sdata))
1069 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1070 /* If an AP vif is found, then disable PS
1071 * by setting the count to zero thereby setting
1077 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1083 if (count == 1 && ieee80211_powersave_allowed(found)) {
1084 struct ieee80211_conf *conf = &local->hw.conf;
1088 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1090 beaconint_us = ieee80211_tu_to_usec(
1091 found->vif.bss_conf.beacon_int);
1093 timeout = local->dynamic_ps_forced_timeout;
1096 * Go to full PSM if the user configures a very low
1097 * latency requirement.
1098 * The 2000 second value is there for compatibility
1099 * until the PM_QOS_NETWORK_LATENCY is configured
1102 if (latency > (1900 * USEC_PER_MSEC) &&
1103 latency != (2000 * USEC_PER_SEC))
1108 local->dynamic_ps_user_timeout = timeout;
1109 if (!local->disable_dynamic_ps)
1110 conf->dynamic_ps_timeout =
1111 local->dynamic_ps_user_timeout;
1113 if (beaconint_us > latency) {
1114 local->ps_sdata = NULL;
1117 u8 dtimper = found->u.mgd.dtim_period;
1119 /* If the TIM IE is invalid, pretend the value is 1 */
1122 else if (dtimper > 1)
1123 maxslp = min_t(int, dtimper,
1124 latency / beaconint_us);
1126 local->hw.conf.max_sleep_period = maxslp;
1127 local->hw.conf.ps_dtim_period = dtimper;
1128 local->ps_sdata = found;
1131 local->ps_sdata = NULL;
1134 ieee80211_change_ps(local);
1137 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1139 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1141 if (sdata->vif.bss_conf.ps != ps_allowed) {
1142 sdata->vif.bss_conf.ps = ps_allowed;
1143 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1147 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1149 struct ieee80211_local *local =
1150 container_of(work, struct ieee80211_local,
1151 dynamic_ps_disable_work);
1153 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1154 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1155 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1158 ieee80211_wake_queues_by_reason(&local->hw,
1159 IEEE80211_QUEUE_STOP_REASON_PS);
1162 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1164 struct ieee80211_local *local =
1165 container_of(work, struct ieee80211_local,
1166 dynamic_ps_enable_work);
1167 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1168 struct ieee80211_if_managed *ifmgd;
1169 unsigned long flags;
1172 /* can only happen when PS was just disabled anyway */
1176 ifmgd = &sdata->u.mgd;
1178 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1181 if (!local->disable_dynamic_ps &&
1182 local->hw.conf.dynamic_ps_timeout > 0) {
1183 /* don't enter PS if TX frames are pending */
1184 if (drv_tx_frames_pending(local)) {
1185 mod_timer(&local->dynamic_ps_timer, jiffies +
1187 local->hw.conf.dynamic_ps_timeout));
1192 * transmission can be stopped by others which leads to
1193 * dynamic_ps_timer expiry. Postpone the ps timer if it
1194 * is not the actual idle state.
1196 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1197 for (q = 0; q < local->hw.queues; q++) {
1198 if (local->queue_stop_reasons[q]) {
1199 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1201 mod_timer(&local->dynamic_ps_timer, jiffies +
1203 local->hw.conf.dynamic_ps_timeout));
1207 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1210 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1211 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1212 netif_tx_stop_all_queues(sdata->dev);
1214 if (drv_tx_frames_pending(local))
1215 mod_timer(&local->dynamic_ps_timer, jiffies +
1217 local->hw.conf.dynamic_ps_timeout));
1219 ieee80211_send_nullfunc(local, sdata, 1);
1220 /* Flush to get the tx status of nullfunc frame */
1221 drv_flush(local, false);
1225 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1226 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1227 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1228 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1229 local->hw.conf.flags |= IEEE80211_CONF_PS;
1230 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1233 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1234 netif_tx_wake_all_queues(sdata->dev);
1237 void ieee80211_dynamic_ps_timer(unsigned long data)
1239 struct ieee80211_local *local = (void *) data;
1241 if (local->quiescing || local->suspended)
1244 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1248 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1249 struct ieee80211_sub_if_data *sdata,
1250 u8 *wmm_param, size_t wmm_param_len)
1252 struct ieee80211_tx_queue_params params;
1253 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1256 u8 *pos, uapsd_queues = 0;
1258 if (!local->ops->conf_tx)
1261 if (local->hw.queues < IEEE80211_NUM_ACS)
1267 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1270 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1271 uapsd_queues = ifmgd->uapsd_queues;
1273 count = wmm_param[6] & 0x0f;
1274 if (count == ifmgd->wmm_last_param_set)
1276 ifmgd->wmm_last_param_set = count;
1278 pos = wmm_param + 8;
1279 left = wmm_param_len - 8;
1281 memset(¶ms, 0, sizeof(params));
1284 for (; left >= 4; left -= 4, pos += 4) {
1285 int aci = (pos[0] >> 5) & 0x03;
1286 int acm = (pos[0] >> 4) & 0x01;
1294 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1295 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1301 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1302 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1308 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1309 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1316 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1317 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1322 params.aifs = pos[0] & 0x0f;
1323 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1324 params.cw_min = ecw2cw(pos[1] & 0x0f);
1325 params.txop = get_unaligned_le16(pos + 2);
1326 params.uapsd = uapsd;
1329 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1331 params.aifs, params.cw_min, params.cw_max,
1332 params.txop, params.uapsd);
1333 sdata->tx_conf[queue] = params;
1334 if (drv_conf_tx(local, sdata, queue, ¶ms))
1336 "failed to set TX queue parameters for queue %d\n",
1340 /* enable WMM or activate new settings */
1341 sdata->vif.bss_conf.qos = true;
1345 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1347 lockdep_assert_held(&sdata->local->mtx);
1349 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1350 IEEE80211_STA_BEACON_POLL);
1351 ieee80211_run_deferred_scan(sdata->local);
1354 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1356 mutex_lock(&sdata->local->mtx);
1357 __ieee80211_stop_poll(sdata);
1358 mutex_unlock(&sdata->local->mtx);
1361 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1362 u16 capab, bool erp_valid, u8 erp)
1364 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1366 bool use_protection;
1367 bool use_short_preamble;
1368 bool use_short_slot;
1371 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1372 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1374 use_protection = false;
1375 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1378 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1379 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1380 use_short_slot = true;
1382 if (use_protection != bss_conf->use_cts_prot) {
1383 bss_conf->use_cts_prot = use_protection;
1384 changed |= BSS_CHANGED_ERP_CTS_PROT;
1387 if (use_short_preamble != bss_conf->use_short_preamble) {
1388 bss_conf->use_short_preamble = use_short_preamble;
1389 changed |= BSS_CHANGED_ERP_PREAMBLE;
1392 if (use_short_slot != bss_conf->use_short_slot) {
1393 bss_conf->use_short_slot = use_short_slot;
1394 changed |= BSS_CHANGED_ERP_SLOT;
1400 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1401 struct cfg80211_bss *cbss,
1402 u32 bss_info_changed)
1404 struct ieee80211_bss *bss = (void *)cbss->priv;
1405 struct ieee80211_local *local = sdata->local;
1406 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1408 bss_info_changed |= BSS_CHANGED_ASSOC;
1409 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1410 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1412 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1413 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1415 sdata->u.mgd.associated = cbss;
1416 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1418 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1420 if (sdata->vif.p2p) {
1421 const struct cfg80211_bss_ies *ies;
1424 ies = rcu_dereference(cbss->ies);
1429 ret = cfg80211_get_p2p_attr(
1430 ies->data, ies->len,
1431 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1434 bss_conf->p2p_oppps = noa[1] & 0x80;
1435 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1436 bss_info_changed |= BSS_CHANGED_P2P_PS;
1437 sdata->u.mgd.p2p_noa_index = noa[0];
1443 /* just to be sure */
1444 ieee80211_stop_poll(sdata);
1446 ieee80211_led_assoc(local, 1);
1448 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
1450 * If the AP is buggy we may get here with no DTIM period
1451 * known, so assume it's 1 which is the only safe assumption
1452 * in that case, although if the TIM IE is broken powersave
1453 * probably just won't work at all.
1455 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1457 bss_conf->dtim_period = 0;
1460 bss_conf->assoc = 1;
1462 /* Tell the driver to monitor connection quality (if supported) */
1463 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1464 bss_conf->cqm_rssi_thold)
1465 bss_info_changed |= BSS_CHANGED_CQM;
1467 /* Enable ARP filtering */
1468 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1469 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1470 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1473 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1475 mutex_lock(&local->iflist_mtx);
1476 ieee80211_recalc_ps(local, -1);
1477 mutex_unlock(&local->iflist_mtx);
1479 ieee80211_recalc_smps(sdata);
1480 ieee80211_recalc_ps_vif(sdata);
1482 netif_tx_start_all_queues(sdata->dev);
1483 netif_carrier_on(sdata->dev);
1486 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1487 u16 stype, u16 reason, bool tx,
1490 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1491 struct ieee80211_local *local = sdata->local;
1492 struct sta_info *sta;
1495 ASSERT_MGD_MTX(ifmgd);
1497 if (WARN_ON_ONCE(tx && !frame_buf))
1500 if (WARN_ON(!ifmgd->associated))
1503 ieee80211_stop_poll(sdata);
1505 ifmgd->associated = NULL;
1508 * we need to commit the associated = NULL change because the
1509 * scan code uses that to determine whether this iface should
1510 * go to/wake up from powersave or not -- and could otherwise
1511 * wake the queues erroneously.
1516 * Thus, we can only afterwards stop the queues -- to account
1517 * for the case where another CPU is finishing a scan at this
1518 * time -- we don't want the scan code to enable queues.
1521 netif_tx_stop_all_queues(sdata->dev);
1522 netif_carrier_off(sdata->dev);
1524 mutex_lock(&local->sta_mtx);
1525 sta = sta_info_get(sdata, ifmgd->bssid);
1527 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1528 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
1530 mutex_unlock(&local->sta_mtx);
1533 * if we want to get out of ps before disassoc (why?) we have
1534 * to do it before sending disassoc, as otherwise the null-packet
1537 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1538 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1539 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1541 local->ps_sdata = NULL;
1543 /* disable per-vif ps */
1544 ieee80211_recalc_ps_vif(sdata);
1546 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1548 drv_flush(local, false);
1550 /* deauthenticate/disassociate now */
1551 if (tx || frame_buf)
1552 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1553 reason, tx, frame_buf);
1555 /* flush out frame */
1557 drv_flush(local, false);
1559 /* clear bssid only after building the needed mgmt frames */
1560 memset(ifmgd->bssid, 0, ETH_ALEN);
1562 /* remove AP and TDLS peers */
1563 sta_info_flush_defer(sdata);
1565 /* finally reset all BSS / config parameters */
1566 changed |= ieee80211_reset_erp_info(sdata);
1568 ieee80211_led_assoc(local, 0);
1569 changed |= BSS_CHANGED_ASSOC;
1570 sdata->vif.bss_conf.assoc = false;
1572 sdata->vif.bss_conf.p2p_ctwindow = 0;
1573 sdata->vif.bss_conf.p2p_oppps = false;
1575 /* on the next assoc, re-program HT parameters */
1576 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1577 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1579 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1581 del_timer_sync(&local->dynamic_ps_timer);
1582 cancel_work_sync(&local->dynamic_ps_enable_work);
1584 /* Disable ARP filtering */
1585 if (sdata->vif.bss_conf.arp_filter_enabled) {
1586 sdata->vif.bss_conf.arp_filter_enabled = false;
1587 changed |= BSS_CHANGED_ARP_FILTER;
1590 sdata->vif.bss_conf.qos = false;
1591 changed |= BSS_CHANGED_QOS;
1593 /* The BSSID (not really interesting) and HT changed */
1594 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1595 ieee80211_bss_info_change_notify(sdata, changed);
1597 /* disassociated - set to defaults now */
1598 ieee80211_set_wmm_default(sdata, false);
1600 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1601 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1602 del_timer_sync(&sdata->u.mgd.timer);
1603 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1605 sdata->u.mgd.timers_running = 0;
1607 sdata->vif.bss_conf.dtim_period = 0;
1610 ieee80211_vif_release_channel(sdata);
1613 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1614 struct ieee80211_hdr *hdr)
1617 * We can postpone the mgd.timer whenever receiving unicast frames
1618 * from AP because we know that the connection is working both ways
1619 * at that time. But multicast frames (and hence also beacons) must
1620 * be ignored here, because we need to trigger the timer during
1621 * data idle periods for sending the periodic probe request to the
1622 * AP we're connected to.
1624 if (is_multicast_ether_addr(hdr->addr1))
1627 ieee80211_sta_reset_conn_monitor(sdata);
1630 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1633 struct ieee80211_local *local = sdata->local;
1635 mutex_lock(&local->mtx);
1636 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1637 IEEE80211_STA_CONNECTION_POLL))) {
1638 mutex_unlock(&local->mtx);
1642 __ieee80211_stop_poll(sdata);
1644 mutex_lock(&local->iflist_mtx);
1645 ieee80211_recalc_ps(local, -1);
1646 mutex_unlock(&local->iflist_mtx);
1648 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1652 * We've received a probe response, but are not sure whether
1653 * we have or will be receiving any beacons or data, so let's
1654 * schedule the timers again, just in case.
1656 ieee80211_sta_reset_beacon_monitor(sdata);
1658 mod_timer(&ifmgd->conn_mon_timer,
1659 round_jiffies_up(jiffies +
1660 IEEE80211_CONNECTION_IDLE_TIME));
1662 mutex_unlock(&local->mtx);
1665 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1666 struct ieee80211_hdr *hdr, bool ack)
1668 if (!ieee80211_is_data(hdr->frame_control))
1672 ieee80211_sta_reset_conn_monitor(sdata);
1674 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1675 sdata->u.mgd.probe_send_count > 0) {
1677 sdata->u.mgd.probe_send_count = 0;
1679 sdata->u.mgd.nullfunc_failed = true;
1680 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1684 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1686 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1688 u8 *dst = ifmgd->associated->bssid;
1689 u8 unicast_limit = max(1, max_probe_tries - 3);
1692 * Try sending broadcast probe requests for the last three
1693 * probe requests after the first ones failed since some
1694 * buggy APs only support broadcast probe requests.
1696 if (ifmgd->probe_send_count >= unicast_limit)
1700 * When the hardware reports an accurate Tx ACK status, it's
1701 * better to send a nullfunc frame instead of a probe request,
1702 * as it will kick us off the AP quickly if we aren't associated
1703 * anymore. The timeout will be reset if the frame is ACKed by
1706 ifmgd->probe_send_count++;
1708 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1709 ifmgd->nullfunc_failed = false;
1710 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1715 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1716 if (WARN_ON_ONCE(ssid == NULL))
1721 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1722 0, (u32) -1, true, false,
1723 ifmgd->associated->channel, false);
1727 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1728 run_again(ifmgd, ifmgd->probe_timeout);
1729 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1730 drv_flush(sdata->local, false);
1733 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1736 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1737 bool already = false;
1739 if (!ieee80211_sdata_running(sdata))
1742 mutex_lock(&ifmgd->mtx);
1744 if (!ifmgd->associated)
1747 mutex_lock(&sdata->local->mtx);
1749 if (sdata->local->tmp_channel || sdata->local->scanning) {
1750 mutex_unlock(&sdata->local->mtx);
1755 mlme_dbg_ratelimited(sdata,
1756 "detected beacon loss from AP - sending probe request\n");
1758 ieee80211_cqm_rssi_notify(&sdata->vif,
1759 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
1762 * The driver/our work has already reported this event or the
1763 * connection monitoring has kicked in and we have already sent
1764 * a probe request. Or maybe the AP died and the driver keeps
1765 * reporting until we disassociate...
1767 * In either case we have to ignore the current call to this
1768 * function (except for setting the correct probe reason bit)
1769 * because otherwise we would reset the timer every time and
1770 * never check whether we received a probe response!
1772 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1773 IEEE80211_STA_CONNECTION_POLL))
1777 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1779 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1781 mutex_unlock(&sdata->local->mtx);
1786 mutex_lock(&sdata->local->iflist_mtx);
1787 ieee80211_recalc_ps(sdata->local, -1);
1788 mutex_unlock(&sdata->local->iflist_mtx);
1790 ifmgd->probe_send_count = 0;
1791 ieee80211_mgd_probe_ap_send(sdata);
1793 mutex_unlock(&ifmgd->mtx);
1796 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1797 struct ieee80211_vif *vif)
1799 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1800 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1801 struct cfg80211_bss *cbss;
1802 struct sk_buff *skb;
1806 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1809 ASSERT_MGD_MTX(ifmgd);
1811 if (ifmgd->associated)
1812 cbss = ifmgd->associated;
1813 else if (ifmgd->auth_data)
1814 cbss = ifmgd->auth_data->bss;
1815 else if (ifmgd->assoc_data)
1816 cbss = ifmgd->assoc_data->bss;
1821 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
1822 if (WARN_ON_ONCE(ssid == NULL))
1827 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
1828 (u32) -1, cbss->channel,
1835 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1837 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata,
1838 bool transmit_frame)
1840 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1841 struct ieee80211_local *local = sdata->local;
1842 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1844 mutex_lock(&ifmgd->mtx);
1845 if (!ifmgd->associated) {
1846 mutex_unlock(&ifmgd->mtx);
1850 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1851 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1852 transmit_frame, frame_buf);
1853 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1854 mutex_unlock(&ifmgd->mtx);
1857 * must be outside lock due to cfg80211,
1858 * but that's not a problem.
1860 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1862 mutex_lock(&local->mtx);
1863 ieee80211_recalc_idle(local);
1864 mutex_unlock(&local->mtx);
1867 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1869 struct ieee80211_sub_if_data *sdata =
1870 container_of(work, struct ieee80211_sub_if_data,
1871 u.mgd.beacon_connection_loss_work);
1872 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1873 struct sta_info *sta;
1875 if (ifmgd->associated) {
1877 sta = sta_info_get(sdata, ifmgd->bssid);
1879 sta->beacon_loss_count++;
1883 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1884 sdata_info(sdata, "Connection to AP %pM lost\n",
1886 __ieee80211_disconnect(sdata, false);
1888 ieee80211_mgd_probe_ap(sdata, true);
1892 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1894 struct ieee80211_sub_if_data *sdata =
1895 container_of(work, struct ieee80211_sub_if_data,
1896 u.mgd.csa_connection_drop_work);
1898 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1899 IEEE80211_QUEUE_STOP_REASON_CSA);
1900 __ieee80211_disconnect(sdata, true);
1903 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1905 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1906 struct ieee80211_hw *hw = &sdata->local->hw;
1908 trace_api_beacon_loss(sdata);
1910 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1911 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1913 EXPORT_SYMBOL(ieee80211_beacon_loss);
1915 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1917 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1918 struct ieee80211_hw *hw = &sdata->local->hw;
1920 trace_api_connection_loss(sdata);
1922 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1923 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1925 EXPORT_SYMBOL(ieee80211_connection_loss);
1928 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1931 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1933 lockdep_assert_held(&sdata->u.mgd.mtx);
1936 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1938 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1939 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1940 sdata->u.mgd.flags = 0;
1941 ieee80211_vif_release_channel(sdata);
1944 cfg80211_put_bss(auth_data->bss);
1946 sdata->u.mgd.auth_data = NULL;
1949 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1950 struct ieee80211_mgmt *mgmt, size_t len)
1952 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1954 struct ieee802_11_elems elems;
1956 pos = mgmt->u.auth.variable;
1957 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1958 if (!elems.challenge)
1960 auth_data->expected_transaction = 4;
1961 drv_mgd_prepare_tx(sdata->local, sdata);
1962 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
1963 elems.challenge - 2, elems.challenge_len + 2,
1964 auth_data->bss->bssid, auth_data->bss->bssid,
1965 auth_data->key, auth_data->key_len,
1966 auth_data->key_idx);
1969 static enum rx_mgmt_action __must_check
1970 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1971 struct ieee80211_mgmt *mgmt, size_t len)
1973 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1975 u16 auth_alg, auth_transaction, status_code;
1976 struct sta_info *sta;
1978 lockdep_assert_held(&ifmgd->mtx);
1981 return RX_MGMT_NONE;
1983 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1984 return RX_MGMT_NONE;
1986 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1988 if (!ether_addr_equal(bssid, mgmt->bssid))
1989 return RX_MGMT_NONE;
1991 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1992 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1993 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1995 if (auth_alg != ifmgd->auth_data->algorithm ||
1996 auth_transaction != ifmgd->auth_data->expected_transaction) {
1997 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1998 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2000 ifmgd->auth_data->expected_transaction);
2001 return RX_MGMT_NONE;
2004 if (status_code != WLAN_STATUS_SUCCESS) {
2005 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2006 mgmt->sa, status_code);
2007 ieee80211_destroy_auth_data(sdata, false);
2008 return RX_MGMT_CFG80211_RX_AUTH;
2011 switch (ifmgd->auth_data->algorithm) {
2012 case WLAN_AUTH_OPEN:
2013 case WLAN_AUTH_LEAP:
2017 case WLAN_AUTH_SHARED_KEY:
2018 if (ifmgd->auth_data->expected_transaction != 4) {
2019 ieee80211_auth_challenge(sdata, mgmt, len);
2020 /* need another frame */
2021 return RX_MGMT_NONE;
2025 WARN_ONCE(1, "invalid auth alg %d",
2026 ifmgd->auth_data->algorithm);
2027 return RX_MGMT_NONE;
2030 sdata_info(sdata, "authenticated\n");
2031 ifmgd->auth_data->done = true;
2032 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2033 run_again(ifmgd, ifmgd->auth_data->timeout);
2035 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2036 ifmgd->auth_data->expected_transaction != 2) {
2038 * Report auth frame to user space for processing since another
2039 * round of Authentication frames is still needed.
2041 return RX_MGMT_CFG80211_RX_AUTH;
2044 /* move station state to auth */
2045 mutex_lock(&sdata->local->sta_mtx);
2046 sta = sta_info_get(sdata, bssid);
2048 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2051 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2052 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2055 mutex_unlock(&sdata->local->sta_mtx);
2057 return RX_MGMT_CFG80211_RX_AUTH;
2059 mutex_unlock(&sdata->local->sta_mtx);
2060 /* ignore frame -- wait for timeout */
2061 return RX_MGMT_NONE;
2065 static enum rx_mgmt_action __must_check
2066 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2067 struct ieee80211_mgmt *mgmt, size_t len)
2069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2070 const u8 *bssid = NULL;
2073 lockdep_assert_held(&ifmgd->mtx);
2076 return RX_MGMT_NONE;
2078 if (!ifmgd->associated ||
2079 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2080 return RX_MGMT_NONE;
2082 bssid = ifmgd->associated->bssid;
2084 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2086 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2087 bssid, reason_code);
2089 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2091 mutex_lock(&sdata->local->mtx);
2092 ieee80211_recalc_idle(sdata->local);
2093 mutex_unlock(&sdata->local->mtx);
2095 return RX_MGMT_CFG80211_DEAUTH;
2099 static enum rx_mgmt_action __must_check
2100 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2101 struct ieee80211_mgmt *mgmt, size_t len)
2103 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2106 lockdep_assert_held(&ifmgd->mtx);
2109 return RX_MGMT_NONE;
2111 if (!ifmgd->associated ||
2112 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2113 return RX_MGMT_NONE;
2115 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2117 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2118 mgmt->sa, reason_code);
2120 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2122 mutex_lock(&sdata->local->mtx);
2123 ieee80211_recalc_idle(sdata->local);
2124 mutex_unlock(&sdata->local->mtx);
2126 return RX_MGMT_CFG80211_DISASSOC;
2129 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2130 u8 *supp_rates, unsigned int supp_rates_len,
2131 u32 *rates, u32 *basic_rates,
2132 bool *have_higher_than_11mbit,
2133 int *min_rate, int *min_rate_index)
2137 for (i = 0; i < supp_rates_len; i++) {
2138 int rate = (supp_rates[i] & 0x7f) * 5;
2139 bool is_basic = !!(supp_rates[i] & 0x80);
2142 *have_higher_than_11mbit = true;
2145 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2146 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2148 * Note: Even through the membership selector and the basic
2149 * rate flag share the same bit, they are not exactly
2152 if (!!(supp_rates[i] & 0x80) &&
2153 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2156 for (j = 0; j < sband->n_bitrates; j++) {
2157 if (sband->bitrates[j].bitrate == rate) {
2160 *basic_rates |= BIT(j);
2161 if (rate < *min_rate) {
2163 *min_rate_index = j;
2171 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2174 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2176 lockdep_assert_held(&sdata->u.mgd.mtx);
2179 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2181 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2182 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2183 sdata->u.mgd.flags = 0;
2184 ieee80211_vif_release_channel(sdata);
2188 sdata->u.mgd.assoc_data = NULL;
2191 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2192 struct cfg80211_bss *cbss,
2193 struct ieee80211_mgmt *mgmt, size_t len)
2195 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2196 struct ieee80211_local *local = sdata->local;
2197 struct ieee80211_supported_band *sband;
2198 struct sta_info *sta;
2200 u16 capab_info, aid;
2201 struct ieee802_11_elems elems;
2202 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2206 /* AssocResp and ReassocResp have identical structure */
2208 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2209 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2211 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2212 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2214 aid &= ~(BIT(15) | BIT(14));
2216 ifmgd->broken_ap = false;
2218 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2219 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2222 ifmgd->broken_ap = true;
2225 pos = mgmt->u.assoc_resp.variable;
2226 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2228 if (!elems.supp_rates) {
2229 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2235 mutex_lock(&sdata->local->sta_mtx);
2237 * station info was already allocated and inserted before
2238 * the association and should be available to us
2240 sta = sta_info_get(sdata, cbss->bssid);
2241 if (WARN_ON(!sta)) {
2242 mutex_unlock(&sdata->local->sta_mtx);
2246 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2248 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2249 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2250 elems.ht_cap_elem, &sta->sta.ht_cap);
2252 sta->supports_40mhz =
2253 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2255 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2256 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2260 rate_control_rate_init(sta);
2262 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2263 set_sta_flag(sta, WLAN_STA_MFP);
2265 if (elems.wmm_param)
2266 set_sta_flag(sta, WLAN_STA_WME);
2268 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2270 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2271 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2272 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2275 "failed to move station %pM to desired state\n",
2277 WARN_ON(__sta_info_destroy(sta));
2278 mutex_unlock(&sdata->local->sta_mtx);
2282 mutex_unlock(&sdata->local->sta_mtx);
2285 * Always handle WMM once after association regardless
2286 * of the first value the AP uses. Setting -1 here has
2287 * that effect because the AP values is an unsigned
2290 ifmgd->wmm_last_param_set = -1;
2292 if (elems.wmm_param)
2293 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2294 elems.wmm_param_len);
2296 ieee80211_set_wmm_default(sdata, false);
2297 changed |= BSS_CHANGED_QOS;
2299 if (elems.ht_operation && elems.wmm_param &&
2300 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2301 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2302 cbss->bssid, false);
2304 /* set AID and assoc capability,
2305 * ieee80211_set_associated() will tell the driver */
2306 bss_conf->aid = aid;
2307 bss_conf->assoc_capability = capab_info;
2308 ieee80211_set_associated(sdata, cbss, changed);
2311 * If we're using 4-addr mode, let the AP know that we're
2312 * doing so, so that it can create the STA VLAN on its side
2314 if (ifmgd->use_4addr)
2315 ieee80211_send_4addr_nullfunc(local, sdata);
2318 * Start timer to probe the connection to the AP now.
2319 * Also start the timer that will detect beacon loss.
2321 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2322 ieee80211_sta_reset_beacon_monitor(sdata);
2327 static enum rx_mgmt_action __must_check
2328 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2329 struct ieee80211_mgmt *mgmt, size_t len,
2330 struct cfg80211_bss **bss)
2332 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2333 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2334 u16 capab_info, status_code, aid;
2335 struct ieee802_11_elems elems;
2339 lockdep_assert_held(&ifmgd->mtx);
2342 return RX_MGMT_NONE;
2343 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2344 return RX_MGMT_NONE;
2347 * AssocResp and ReassocResp have identical structure, so process both
2348 * of them in this function.
2352 return RX_MGMT_NONE;
2354 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2355 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2356 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2357 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2360 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2361 reassoc ? "Rea" : "A", mgmt->sa,
2362 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2364 pos = mgmt->u.assoc_resp.variable;
2365 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2367 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2368 elems.timeout_int && elems.timeout_int_len == 5 &&
2369 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2371 tu = get_unaligned_le32(elems.timeout_int + 1);
2372 ms = tu * 1024 / 1000;
2374 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2376 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2377 if (ms > IEEE80211_ASSOC_TIMEOUT)
2378 run_again(ifmgd, assoc_data->timeout);
2379 return RX_MGMT_NONE;
2382 *bss = assoc_data->bss;
2384 if (status_code != WLAN_STATUS_SUCCESS) {
2385 sdata_info(sdata, "%pM denied association (code=%d)\n",
2386 mgmt->sa, status_code);
2387 ieee80211_destroy_assoc_data(sdata, false);
2389 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2390 /* oops -- internal error -- send timeout for now */
2391 ieee80211_destroy_assoc_data(sdata, false);
2392 cfg80211_put_bss(*bss);
2393 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2395 sdata_info(sdata, "associated\n");
2398 * destroy assoc_data afterwards, as otherwise an idle
2399 * recalc after assoc_data is NULL but before associated
2400 * is set can cause the interface to go idle
2402 ieee80211_destroy_assoc_data(sdata, true);
2405 return RX_MGMT_CFG80211_RX_ASSOC;
2408 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2409 struct ieee80211_mgmt *mgmt, size_t len,
2410 struct ieee80211_rx_status *rx_status,
2411 struct ieee802_11_elems *elems)
2413 struct ieee80211_local *local = sdata->local;
2415 struct ieee80211_bss *bss;
2416 struct ieee80211_channel *channel;
2417 bool need_ps = false;
2419 if ((sdata->u.mgd.associated &&
2420 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2421 (sdata->u.mgd.assoc_data &&
2422 ether_addr_equal(mgmt->bssid,
2423 sdata->u.mgd.assoc_data->bss->bssid))) {
2424 /* not previously set so we may need to recalc */
2425 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2427 if (elems->tim && !elems->parse_error) {
2428 struct ieee80211_tim_ie *tim_ie = elems->tim;
2429 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2433 if (elems->ds_params && elems->ds_params_len == 1)
2434 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2437 freq = rx_status->freq;
2439 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2441 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2444 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2447 ieee80211_rx_bss_put(local, bss);
2449 if (!sdata->u.mgd.associated)
2453 mutex_lock(&local->iflist_mtx);
2454 ieee80211_recalc_ps(local, -1);
2455 mutex_unlock(&local->iflist_mtx);
2458 if (elems->ch_switch_ie &&
2459 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2460 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
2461 bss, rx_status->mactime);
2465 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2466 struct sk_buff *skb)
2468 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2469 struct ieee80211_if_managed *ifmgd;
2470 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2471 size_t baselen, len = skb->len;
2472 struct ieee802_11_elems elems;
2474 ifmgd = &sdata->u.mgd;
2476 ASSERT_MGD_MTX(ifmgd);
2478 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2479 return; /* ignore ProbeResp to foreign address */
2481 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2485 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2488 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2490 if (ifmgd->associated &&
2491 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2492 ieee80211_reset_ap_probe(sdata);
2494 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2495 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2496 /* got probe response, continue with auth */
2497 sdata_info(sdata, "direct probe responded\n");
2498 ifmgd->auth_data->tries = 0;
2499 ifmgd->auth_data->timeout = jiffies;
2500 run_again(ifmgd, ifmgd->auth_data->timeout);
2505 * This is the canonical list of information elements we care about,
2506 * the filter code also gives us all changes to the Microsoft OUI
2507 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2509 * We implement beacon filtering in software since that means we can
2510 * avoid processing the frame here and in cfg80211, and userspace
2511 * will not be able to tell whether the hardware supports it or not.
2513 * XXX: This list needs to be dynamic -- userspace needs to be able to
2514 * add items it requires. It also needs to be able to tell us to
2515 * look out for other vendor IEs.
2517 static const u64 care_about_ies =
2518 (1ULL << WLAN_EID_COUNTRY) |
2519 (1ULL << WLAN_EID_ERP_INFO) |
2520 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2521 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2522 (1ULL << WLAN_EID_HT_CAPABILITY) |
2523 (1ULL << WLAN_EID_HT_OPERATION);
2525 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2526 struct ieee80211_mgmt *mgmt,
2528 struct ieee80211_rx_status *rx_status)
2530 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2531 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2533 struct ieee802_11_elems elems;
2534 struct ieee80211_local *local = sdata->local;
2535 struct ieee80211_chanctx_conf *chanctx_conf;
2536 struct ieee80211_channel *chan;
2543 lockdep_assert_held(&ifmgd->mtx);
2545 /* Process beacon from the current BSS */
2546 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2551 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2552 if (!chanctx_conf) {
2557 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2561 chan = chanctx_conf->def.chan;
2564 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2565 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2566 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2567 len - baselen, &elems);
2569 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2570 ifmgd->assoc_data->have_beacon = true;
2571 ifmgd->assoc_data->sent_assoc = false;
2572 /* continue assoc process */
2573 ifmgd->assoc_data->timeout = jiffies;
2574 run_again(ifmgd, ifmgd->assoc_data->timeout);
2578 if (!ifmgd->associated ||
2579 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2581 bssid = ifmgd->associated->bssid;
2583 /* Track average RSSI from the Beacon frames of the current AP */
2584 ifmgd->last_beacon_signal = rx_status->signal;
2585 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2586 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2587 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2588 ifmgd->last_cqm_event_signal = 0;
2589 ifmgd->count_beacon_signal = 1;
2590 ifmgd->last_ave_beacon_signal = 0;
2592 ifmgd->ave_beacon_signal =
2593 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2594 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2595 ifmgd->ave_beacon_signal) / 16;
2596 ifmgd->count_beacon_signal++;
2599 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2600 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2601 int sig = ifmgd->ave_beacon_signal;
2602 int last_sig = ifmgd->last_ave_beacon_signal;
2605 * if signal crosses either of the boundaries, invoke callback
2606 * with appropriate parameters
2608 if (sig > ifmgd->rssi_max_thold &&
2609 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2610 ifmgd->last_ave_beacon_signal = sig;
2611 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2612 } else if (sig < ifmgd->rssi_min_thold &&
2613 (last_sig >= ifmgd->rssi_max_thold ||
2615 ifmgd->last_ave_beacon_signal = sig;
2616 drv_rssi_callback(local, RSSI_EVENT_LOW);
2620 if (bss_conf->cqm_rssi_thold &&
2621 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2622 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2623 int sig = ifmgd->ave_beacon_signal / 16;
2624 int last_event = ifmgd->last_cqm_event_signal;
2625 int thold = bss_conf->cqm_rssi_thold;
2626 int hyst = bss_conf->cqm_rssi_hyst;
2628 (last_event == 0 || sig < last_event - hyst)) {
2629 ifmgd->last_cqm_event_signal = sig;
2630 ieee80211_cqm_rssi_notify(
2632 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2634 } else if (sig > thold &&
2635 (last_event == 0 || sig > last_event + hyst)) {
2636 ifmgd->last_cqm_event_signal = sig;
2637 ieee80211_cqm_rssi_notify(
2639 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2644 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2645 mlme_dbg_ratelimited(sdata,
2646 "cancelling probereq poll due to a received beacon\n");
2647 mutex_lock(&local->mtx);
2648 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2649 ieee80211_run_deferred_scan(local);
2650 mutex_unlock(&local->mtx);
2652 mutex_lock(&local->iflist_mtx);
2653 ieee80211_recalc_ps(local, -1);
2654 mutex_unlock(&local->iflist_mtx);
2658 * Push the beacon loss detection into the future since
2659 * we are processing a beacon from the AP just now.
2661 ieee80211_sta_reset_beacon_monitor(sdata);
2663 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2664 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2665 len - baselen, &elems,
2666 care_about_ies, ncrc);
2668 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2669 bool directed_tim = ieee80211_check_tim(elems.tim,
2673 if (local->hw.conf.dynamic_ps_timeout > 0) {
2674 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2675 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2676 ieee80211_hw_config(local,
2677 IEEE80211_CONF_CHANGE_PS);
2679 ieee80211_send_nullfunc(local, sdata, 0);
2680 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2681 local->pspolling = true;
2684 * Here is assumed that the driver will be
2685 * able to send ps-poll frame and receive a
2686 * response even though power save mode is
2687 * enabled, but some drivers might require
2688 * to disable power save here. This needs
2689 * to be investigated.
2691 ieee80211_send_pspoll(local, sdata);
2696 if (sdata->vif.p2p) {
2700 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2702 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2704 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2705 bss_conf->p2p_oppps = noa[1] & 0x80;
2706 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2707 changed |= BSS_CHANGED_P2P_PS;
2708 sdata->u.mgd.p2p_noa_index = noa[0];
2710 * make sure we update all information, the CRC
2711 * mechanism doesn't look at P2P attributes.
2713 ifmgd->beacon_crc_valid = false;
2717 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2719 ifmgd->beacon_crc = ncrc;
2720 ifmgd->beacon_crc_valid = true;
2722 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2724 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2725 elems.wmm_param_len))
2726 changed |= BSS_CHANGED_QOS;
2728 if (elems.erp_info && elems.erp_info_len >= 1) {
2730 erp_value = elems.erp_info[0];
2734 changed |= ieee80211_handle_bss_capability(sdata,
2735 le16_to_cpu(mgmt->u.beacon.capab_info),
2736 erp_valid, erp_value);
2739 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
2740 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2741 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2744 if (elems.country_elem && elems.pwr_constr_elem &&
2745 mgmt->u.probe_resp.capab_info &
2746 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
2747 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2749 elems.country_elem_len,
2750 elems.pwr_constr_elem);
2752 ieee80211_bss_info_change_notify(sdata, changed);
2755 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2756 struct sk_buff *skb)
2758 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2759 struct ieee80211_rx_status *rx_status;
2760 struct ieee80211_mgmt *mgmt;
2761 struct cfg80211_bss *bss = NULL;
2762 enum rx_mgmt_action rma = RX_MGMT_NONE;
2765 rx_status = (struct ieee80211_rx_status *) skb->cb;
2766 mgmt = (struct ieee80211_mgmt *) skb->data;
2767 fc = le16_to_cpu(mgmt->frame_control);
2769 mutex_lock(&ifmgd->mtx);
2771 switch (fc & IEEE80211_FCTL_STYPE) {
2772 case IEEE80211_STYPE_BEACON:
2773 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2775 case IEEE80211_STYPE_PROBE_RESP:
2776 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2778 case IEEE80211_STYPE_AUTH:
2779 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2781 case IEEE80211_STYPE_DEAUTH:
2782 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2784 case IEEE80211_STYPE_DISASSOC:
2785 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2787 case IEEE80211_STYPE_ASSOC_RESP:
2788 case IEEE80211_STYPE_REASSOC_RESP:
2789 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2791 case IEEE80211_STYPE_ACTION:
2792 switch (mgmt->u.action.category) {
2793 case WLAN_CATEGORY_SPECTRUM_MGMT:
2794 ieee80211_sta_process_chanswitch(sdata,
2795 &mgmt->u.action.u.chan_switch.sw_elem,
2796 (void *)ifmgd->associated->priv,
2797 rx_status->mactime);
2801 mutex_unlock(&ifmgd->mtx);
2807 case RX_MGMT_CFG80211_DEAUTH:
2808 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2810 case RX_MGMT_CFG80211_DISASSOC:
2811 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2813 case RX_MGMT_CFG80211_RX_AUTH:
2814 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2816 case RX_MGMT_CFG80211_RX_ASSOC:
2817 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2819 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2820 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2823 WARN(1, "unexpected: %d", rma);
2827 static void ieee80211_sta_timer(unsigned long data)
2829 struct ieee80211_sub_if_data *sdata =
2830 (struct ieee80211_sub_if_data *) data;
2831 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2832 struct ieee80211_local *local = sdata->local;
2834 if (local->quiescing) {
2835 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2839 ieee80211_queue_work(&local->hw, &sdata->work);
2842 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2843 u8 *bssid, u8 reason)
2845 struct ieee80211_local *local = sdata->local;
2846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2847 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2849 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2851 mutex_unlock(&ifmgd->mtx);
2854 * must be outside lock due to cfg80211,
2855 * but that's not a problem.
2857 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
2859 mutex_lock(&local->mtx);
2860 ieee80211_recalc_idle(local);
2861 mutex_unlock(&local->mtx);
2863 mutex_lock(&ifmgd->mtx);
2866 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2868 struct ieee80211_local *local = sdata->local;
2869 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2870 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2872 lockdep_assert_held(&ifmgd->mtx);
2874 if (WARN_ON_ONCE(!auth_data))
2879 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2880 sdata_info(sdata, "authentication with %pM timed out\n",
2881 auth_data->bss->bssid);
2884 * Most likely AP is not in the range so remove the
2885 * bss struct for that AP.
2887 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2892 drv_mgd_prepare_tx(local, sdata);
2894 if (auth_data->bss->proberesp_ies) {
2898 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2899 auth_data->bss->bssid, auth_data->tries,
2900 IEEE80211_AUTH_MAX_TRIES);
2902 auth_data->expected_transaction = 2;
2904 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2905 trans = auth_data->sae_trans;
2906 status = auth_data->sae_status;
2907 auth_data->expected_transaction = trans;
2910 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2911 auth_data->data, auth_data->data_len,
2912 auth_data->bss->bssid,
2913 auth_data->bss->bssid, NULL, 0, 0);
2917 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2918 auth_data->bss->bssid, auth_data->tries,
2919 IEEE80211_AUTH_MAX_TRIES);
2922 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2928 * Direct probe is sent to broadcast address as some APs
2929 * will not answer to direct packet in unassociated state.
2931 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2932 NULL, 0, (u32) -1, true, false,
2933 auth_data->bss->channel, false);
2937 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2938 run_again(ifmgd, auth_data->timeout);
2943 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2945 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2946 struct ieee80211_local *local = sdata->local;
2948 lockdep_assert_held(&sdata->u.mgd.mtx);
2950 assoc_data->tries++;
2951 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2952 sdata_info(sdata, "association with %pM timed out\n",
2953 assoc_data->bss->bssid);
2956 * Most likely AP is not in the range so remove the
2957 * bss struct for that AP.
2959 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2964 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2965 assoc_data->bss->bssid, assoc_data->tries,
2966 IEEE80211_ASSOC_MAX_TRIES);
2967 ieee80211_send_assoc(sdata);
2969 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2970 run_again(&sdata->u.mgd, assoc_data->timeout);
2975 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2977 struct ieee80211_local *local = sdata->local;
2978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2980 mutex_lock(&ifmgd->mtx);
2982 if (ifmgd->auth_data &&
2983 time_after(jiffies, ifmgd->auth_data->timeout)) {
2984 if (ifmgd->auth_data->done) {
2986 * ok ... we waited for assoc but userspace didn't,
2987 * so let's just kill the auth data
2989 ieee80211_destroy_auth_data(sdata, false);
2990 } else if (ieee80211_probe_auth(sdata)) {
2993 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2995 ieee80211_destroy_auth_data(sdata, false);
2997 mutex_unlock(&ifmgd->mtx);
2998 cfg80211_send_auth_timeout(sdata->dev, bssid);
2999 mutex_lock(&ifmgd->mtx);
3001 } else if (ifmgd->auth_data)
3002 run_again(ifmgd, ifmgd->auth_data->timeout);
3004 if (ifmgd->assoc_data &&
3005 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3006 if (!ifmgd->assoc_data->have_beacon ||
3007 ieee80211_do_assoc(sdata)) {
3010 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3012 ieee80211_destroy_assoc_data(sdata, false);
3014 mutex_unlock(&ifmgd->mtx);
3015 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3016 mutex_lock(&ifmgd->mtx);
3018 } else if (ifmgd->assoc_data)
3019 run_again(ifmgd, ifmgd->assoc_data->timeout);
3021 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3022 IEEE80211_STA_CONNECTION_POLL) &&
3023 ifmgd->associated) {
3027 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3029 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3030 max_tries = max_nullfunc_tries;
3032 max_tries = max_probe_tries;
3034 /* ACK received for nullfunc probing frame */
3035 if (!ifmgd->probe_send_count)
3036 ieee80211_reset_ap_probe(sdata);
3037 else if (ifmgd->nullfunc_failed) {
3038 if (ifmgd->probe_send_count < max_tries) {
3040 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3041 bssid, ifmgd->probe_send_count,
3043 ieee80211_mgd_probe_ap_send(sdata);
3046 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3048 ieee80211_sta_connection_lost(sdata, bssid,
3049 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
3051 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3052 run_again(ifmgd, ifmgd->probe_timeout);
3053 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3055 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3056 bssid, probe_wait_ms);
3057 ieee80211_sta_connection_lost(sdata, bssid,
3058 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
3059 } else if (ifmgd->probe_send_count < max_tries) {
3061 "No probe response from AP %pM after %dms, try %d/%i\n",
3062 bssid, probe_wait_ms,
3063 ifmgd->probe_send_count, max_tries);
3064 ieee80211_mgd_probe_ap_send(sdata);
3067 * We actually lost the connection ... or did we?
3070 wiphy_debug(local->hw.wiphy,
3071 "%s: No probe response from AP %pM"
3072 " after %dms, disconnecting.\n",
3074 bssid, probe_wait_ms);
3076 ieee80211_sta_connection_lost(sdata, bssid,
3077 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
3081 mutex_unlock(&ifmgd->mtx);
3083 mutex_lock(&local->mtx);
3084 ieee80211_recalc_idle(local);
3085 mutex_unlock(&local->mtx);
3088 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3090 struct ieee80211_sub_if_data *sdata =
3091 (struct ieee80211_sub_if_data *) data;
3092 struct ieee80211_local *local = sdata->local;
3094 if (local->quiescing)
3097 ieee80211_queue_work(&sdata->local->hw,
3098 &sdata->u.mgd.beacon_connection_loss_work);
3101 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3103 struct ieee80211_sub_if_data *sdata =
3104 (struct ieee80211_sub_if_data *) data;
3105 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3106 struct ieee80211_local *local = sdata->local;
3108 if (local->quiescing)
3111 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3114 static void ieee80211_sta_monitor_work(struct work_struct *work)
3116 struct ieee80211_sub_if_data *sdata =
3117 container_of(work, struct ieee80211_sub_if_data,
3118 u.mgd.monitor_work);
3120 ieee80211_mgd_probe_ap(sdata, false);
3123 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3127 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3128 __ieee80211_stop_poll(sdata);
3130 /* let's probe the connection once */
3131 flags = sdata->local->hw.flags;
3132 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3133 ieee80211_queue_work(&sdata->local->hw,
3134 &sdata->u.mgd.monitor_work);
3135 /* and do all the other regular work too */
3136 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3141 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3146 * we need to use atomic bitops for the running bits
3147 * only because both timers might fire at the same
3148 * time -- the code here is properly synchronised.
3151 cancel_work_sync(&ifmgd->request_smps_work);
3153 cancel_work_sync(&ifmgd->monitor_work);
3154 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
3155 cancel_work_sync(&ifmgd->csa_connection_drop_work);
3156 if (del_timer_sync(&ifmgd->timer))
3157 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3159 cancel_work_sync(&ifmgd->chswitch_work);
3160 if (del_timer_sync(&ifmgd->chswitch_timer))
3161 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
3163 /* these will just be re-established on connection */
3164 del_timer_sync(&ifmgd->conn_mon_timer);
3165 del_timer_sync(&ifmgd->bcn_mon_timer);
3168 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3170 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3172 if (!ifmgd->associated)
3175 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3176 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3177 mutex_lock(&ifmgd->mtx);
3178 if (ifmgd->associated) {
3180 "driver requested disconnect after resume\n");
3181 ieee80211_sta_connection_lost(sdata,
3182 ifmgd->associated->bssid,
3183 WLAN_REASON_UNSPECIFIED);
3184 mutex_unlock(&ifmgd->mtx);
3187 mutex_unlock(&ifmgd->mtx);
3190 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3191 add_timer(&ifmgd->timer);
3192 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3193 add_timer(&ifmgd->chswitch_timer);
3194 ieee80211_sta_reset_beacon_monitor(sdata);
3196 mutex_lock(&sdata->local->mtx);
3197 ieee80211_restart_sta_timer(sdata);
3198 mutex_unlock(&sdata->local->mtx);
3202 /* interface setup */
3203 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3205 struct ieee80211_if_managed *ifmgd;
3207 ifmgd = &sdata->u.mgd;
3208 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3209 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3210 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3211 ieee80211_beacon_connection_loss_work);
3212 INIT_WORK(&ifmgd->csa_connection_drop_work,
3213 ieee80211_csa_connection_drop_work);
3214 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3215 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3216 (unsigned long) sdata);
3217 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3218 (unsigned long) sdata);
3219 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3220 (unsigned long) sdata);
3221 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3222 (unsigned long) sdata);
3225 ifmgd->powersave = sdata->wdev.ps;
3226 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3227 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
3229 mutex_init(&ifmgd->mtx);
3231 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3232 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3234 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3237 /* scan finished notification */
3238 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3240 struct ieee80211_sub_if_data *sdata;
3242 /* Restart STA timers */
3244 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3245 ieee80211_restart_sta_timer(sdata);
3249 int ieee80211_max_network_latency(struct notifier_block *nb,
3250 unsigned long data, void *dummy)
3252 s32 latency_usec = (s32) data;
3253 struct ieee80211_local *local =
3254 container_of(nb, struct ieee80211_local,
3255 network_latency_notifier);
3257 mutex_lock(&local->iflist_mtx);
3258 ieee80211_recalc_ps(local, latency_usec);
3259 mutex_unlock(&local->iflist_mtx);
3264 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
3270 case NL80211_CHAN_WIDTH_20:
3271 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3272 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3274 case NL80211_CHAN_WIDTH_40:
3275 c->width = NL80211_CHAN_WIDTH_20;
3276 c->center_freq1 = c->chan->center_freq;
3277 ret = IEEE80211_STA_DISABLE_40MHZ |
3278 IEEE80211_STA_DISABLE_VHT;
3280 case NL80211_CHAN_WIDTH_80:
3281 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3285 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3286 c->width = NL80211_CHAN_WIDTH_40;
3287 ret = IEEE80211_STA_DISABLE_VHT;
3289 case NL80211_CHAN_WIDTH_80P80:
3290 c->center_freq2 = 0;
3291 c->width = NL80211_CHAN_WIDTH_80;
3292 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3293 IEEE80211_STA_DISABLE_160MHZ;
3295 case NL80211_CHAN_WIDTH_160:
3297 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3300 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3301 c->width = NL80211_CHAN_WIDTH_80;
3302 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3303 IEEE80211_STA_DISABLE_160MHZ;
3306 case NL80211_CHAN_WIDTH_20_NOHT:
3308 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3309 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3313 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3319 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
3320 struct ieee80211_supported_band *sband,
3321 struct ieee80211_channel *channel,
3322 const struct ieee80211_ht_operation *ht_oper,
3323 const struct ieee80211_vht_operation *vht_oper,
3324 struct cfg80211_chan_def *chandef)
3326 struct cfg80211_chan_def vht_chandef;
3329 chandef->chan = channel;
3330 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
3331 chandef->center_freq1 = channel->center_freq;
3332 chandef->center_freq2 = 0;
3334 if (!ht_oper || !sband->ht_cap.ht_supported) {
3335 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3339 chandef->width = NL80211_CHAN_WIDTH_20;
3341 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3343 /* check that channel matches the right operating channel */
3344 if (channel->center_freq != ht_cfreq) {
3346 * It's possible that some APs are confused here;
3347 * Netgear WNDR3700 sometimes reports 4 higher than
3348 * the actual channel in association responses, but
3349 * since we look at probe response/beacon data here
3353 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3354 channel->center_freq, ht_cfreq,
3355 ht_oper->primary_chan, channel->band);
3356 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3360 /* check 40 MHz support, if we have it */
3361 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3362 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3363 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3364 chandef->width = NL80211_CHAN_WIDTH_40;
3365 chandef->center_freq1 += 10;
3367 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3368 chandef->width = NL80211_CHAN_WIDTH_40;
3369 chandef->center_freq1 -= 10;
3373 /* 40 MHz (and 80 MHz) must be supported for VHT */
3374 ret = IEEE80211_STA_DISABLE_VHT;
3378 if (!vht_oper || !sband->vht_cap.vht_supported) {
3379 ret = IEEE80211_STA_DISABLE_VHT;
3383 vht_chandef.chan = channel;
3384 vht_chandef.center_freq1 =
3385 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
3387 vht_chandef.center_freq2 = 0;
3389 if (vht_oper->center_freq_seg2_idx)
3390 vht_chandef.center_freq2 =
3391 ieee80211_channel_to_frequency(
3392 vht_oper->center_freq_seg2_idx,
3395 switch (vht_oper->chan_width) {
3396 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3397 vht_chandef.width = chandef->width;
3399 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3400 vht_chandef.width = NL80211_CHAN_WIDTH_80;
3402 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3403 vht_chandef.width = NL80211_CHAN_WIDTH_160;
3405 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3406 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
3410 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3411 vht_oper->chan_width);
3412 ret = IEEE80211_STA_DISABLE_VHT;
3416 if (!cfg80211_chandef_valid(&vht_chandef)) {
3418 "AP VHT information is invalid, disable VHT\n");
3419 ret = IEEE80211_STA_DISABLE_VHT;
3423 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
3428 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
3430 "AP VHT information doesn't match HT, disable VHT\n");
3431 ret = IEEE80211_STA_DISABLE_VHT;
3435 *chandef = vht_chandef;
3439 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
3440 IEEE80211_CHAN_DISABLED)) {
3441 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
3442 ret = IEEE80211_STA_DISABLE_HT |
3443 IEEE80211_STA_DISABLE_VHT;
3447 ret = chandef_downgrade(chandef);
3450 if (chandef->width != vht_chandef.width)
3452 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3455 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
3459 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3460 struct cfg80211_bss *cbss)
3462 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3463 const u8 *ht_cap_ie, *vht_cap_ie;
3464 const struct ieee80211_ht_cap *ht_cap;
3465 const struct ieee80211_vht_cap *vht_cap;
3468 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3471 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3472 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3473 ht_cap = (void *)(ht_cap_ie + 2);
3474 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3476 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3477 * "Tx Unequal Modulation Supported" fields.
3481 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3484 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3485 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3489 vht_cap = (void *)(vht_cap_ie + 2);
3490 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3491 for (nss = 8; nss > 0; nss--) {
3492 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3493 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3496 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3497 chains = max(chains, nss);
3503 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3504 struct cfg80211_bss *cbss)
3506 struct ieee80211_local *local = sdata->local;
3507 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3508 const struct ieee80211_ht_operation *ht_oper = NULL;
3509 const struct ieee80211_vht_operation *vht_oper = NULL;
3510 struct ieee80211_supported_band *sband;
3511 struct cfg80211_chan_def chandef;
3514 sband = local->hw.wiphy->bands[cbss->channel->band];
3516 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3517 IEEE80211_STA_DISABLE_80P80MHZ |
3518 IEEE80211_STA_DISABLE_160MHZ);
3522 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3523 sband->ht_cap.ht_supported) {
3524 const u8 *ht_oper_ie;
3526 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3527 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3528 ht_oper = (void *)(ht_oper_ie + 2);
3531 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3532 sband->vht_cap.vht_supported) {
3533 const u8 *vht_oper_ie;
3535 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3536 WLAN_EID_VHT_OPERATION);
3537 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3538 vht_oper = (void *)(vht_oper_ie + 2);
3539 if (vht_oper && !ht_oper) {
3542 "AP advertised VHT without HT, disabling both\n");
3543 sdata->flags |= IEEE80211_STA_DISABLE_HT;
3544 sdata->flags |= IEEE80211_STA_DISABLE_VHT;
3548 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3553 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3558 /* will change later if needed */
3559 sdata->smps_mode = IEEE80211_SMPS_OFF;
3562 * If this fails (possibly due to channel context sharing
3563 * on incompatible channels, e.g. 80+80 and 160 sharing the
3564 * same control channel) try to use a smaller bandwidth.
3566 ret = ieee80211_vif_use_channel(sdata, &chandef,
3567 IEEE80211_CHANCTX_SHARED);
3568 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
3569 ifmgd->flags |= chandef_downgrade(&chandef);
3573 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3574 struct cfg80211_bss *cbss, bool assoc)
3576 struct ieee80211_local *local = sdata->local;
3577 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3578 struct ieee80211_bss *bss = (void *)cbss->priv;
3579 struct sta_info *new_sta = NULL;
3580 bool have_sta = false;
3583 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3588 have_sta = sta_info_get(sdata, cbss->bssid);
3593 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3598 mutex_lock(&local->mtx);
3599 ieee80211_recalc_idle(sdata->local);
3600 mutex_unlock(&local->mtx);
3603 u32 rates = 0, basic_rates = 0;
3604 bool have_higher_than_11mbit;
3605 int min_rate = INT_MAX, min_rate_index = -1;
3606 struct ieee80211_supported_band *sband;
3608 sband = local->hw.wiphy->bands[cbss->channel->band];
3610 err = ieee80211_prep_channel(sdata, cbss);
3612 sta_info_free(local, new_sta);
3616 ieee80211_get_rates(sband, bss->supp_rates,
3617 bss->supp_rates_len,
3618 &rates, &basic_rates,
3619 &have_higher_than_11mbit,
3620 &min_rate, &min_rate_index);
3623 * This used to be a workaround for basic rates missing
3624 * in the association response frame. Now that we no
3625 * longer use the basic rates from there, it probably
3626 * doesn't happen any more, but keep the workaround so
3627 * in case some *other* APs are buggy in different ways
3628 * we can connect -- with a warning.
3630 if (!basic_rates && min_rate_index >= 0) {
3632 "No basic rates, using min rate instead\n");
3633 basic_rates = BIT(min_rate_index);
3636 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3637 sdata->vif.bss_conf.basic_rates = basic_rates;
3639 /* cf. IEEE 802.11 9.2.12 */
3640 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3641 have_higher_than_11mbit)
3642 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3644 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3646 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3648 /* set timing information */
3649 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3650 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3651 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3653 /* tell driver about BSSID, basic rates and timing */
3654 ieee80211_bss_info_change_notify(sdata,
3655 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3656 BSS_CHANGED_BEACON_INT);
3659 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3661 err = sta_info_insert(new_sta);
3665 "failed to insert STA entry for the AP (error %d)\n",
3670 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3676 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3677 struct cfg80211_auth_request *req)
3679 struct ieee80211_local *local = sdata->local;
3680 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3681 struct ieee80211_mgd_auth_data *auth_data;
3685 /* prepare auth data structure */
3687 switch (req->auth_type) {
3688 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3689 auth_alg = WLAN_AUTH_OPEN;
3691 case NL80211_AUTHTYPE_SHARED_KEY:
3692 if (IS_ERR(local->wep_tx_tfm))
3694 auth_alg = WLAN_AUTH_SHARED_KEY;
3696 case NL80211_AUTHTYPE_FT:
3697 auth_alg = WLAN_AUTH_FT;
3699 case NL80211_AUTHTYPE_NETWORK_EAP:
3700 auth_alg = WLAN_AUTH_LEAP;
3702 case NL80211_AUTHTYPE_SAE:
3703 auth_alg = WLAN_AUTH_SAE;
3709 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3710 req->ie_len, GFP_KERNEL);
3714 auth_data->bss = req->bss;
3716 if (req->sae_data_len >= 4) {
3717 __le16 *pos = (__le16 *) req->sae_data;
3718 auth_data->sae_trans = le16_to_cpu(pos[0]);
3719 auth_data->sae_status = le16_to_cpu(pos[1]);
3720 memcpy(auth_data->data, req->sae_data + 4,
3721 req->sae_data_len - 4);
3722 auth_data->data_len += req->sae_data_len - 4;
3725 if (req->ie && req->ie_len) {
3726 memcpy(&auth_data->data[auth_data->data_len],
3727 req->ie, req->ie_len);
3728 auth_data->data_len += req->ie_len;
3731 if (req->key && req->key_len) {
3732 auth_data->key_len = req->key_len;
3733 auth_data->key_idx = req->key_idx;
3734 memcpy(auth_data->key, req->key, req->key_len);
3737 auth_data->algorithm = auth_alg;
3739 /* try to authenticate/probe */
3741 mutex_lock(&ifmgd->mtx);
3743 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3744 ifmgd->assoc_data) {
3749 if (ifmgd->auth_data)
3750 ieee80211_destroy_auth_data(sdata, false);
3752 /* prep auth_data so we don't go into idle on disassoc */
3753 ifmgd->auth_data = auth_data;
3755 if (ifmgd->associated)
3756 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3758 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
3760 err = ieee80211_prep_connection(sdata, req->bss, false);
3764 err = ieee80211_probe_auth(sdata);
3766 sta_info_destroy_addr(sdata, req->bss->bssid);
3770 /* hold our own reference */
3771 cfg80211_ref_bss(auth_data->bss);
3776 memset(ifmgd->bssid, 0, ETH_ALEN);
3777 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3778 ifmgd->auth_data = NULL;
3782 mutex_unlock(&ifmgd->mtx);
3787 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3788 struct cfg80211_assoc_request *req)
3790 struct ieee80211_local *local = sdata->local;
3791 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3792 struct ieee80211_bss *bss = (void *)req->bss->priv;
3793 struct ieee80211_mgd_assoc_data *assoc_data;
3794 struct ieee80211_supported_band *sband;
3795 const u8 *ssidie, *ht_ie, *vht_ie;
3798 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3803 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3809 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3810 assoc_data->ssid_len = ssidie[1];
3813 mutex_lock(&ifmgd->mtx);
3815 if (ifmgd->associated)
3816 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3818 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3823 if (ifmgd->assoc_data) {
3828 if (ifmgd->auth_data) {
3831 /* keep sta info, bssid if matching */
3832 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3833 ieee80211_destroy_auth_data(sdata, match);
3836 /* prepare assoc data */
3838 ifmgd->beacon_crc_valid = false;
3841 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3842 * We still associate in non-HT mode (11a/b/g) if any one of these
3843 * ciphers is configured as pairwise.
3844 * We can set this to true for non-11n hardware, that'll be checked
3845 * separately along with the peer capabilities.
3847 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
3848 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3849 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3850 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
3851 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3852 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3853 netdev_info(sdata->dev,
3854 "disabling HT/VHT due to WEP/TKIP use\n");
3858 if (req->flags & ASSOC_REQ_DISABLE_HT) {
3859 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3860 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3863 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3864 sband = local->hw.wiphy->bands[req->bss->channel->band];
3865 if (!sband->ht_cap.ht_supported ||
3866 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3867 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3869 netdev_info(sdata->dev,
3870 "disabling HT as WMM/QoS is not supported by the AP\n");
3873 /* disable VHT if we don't support it or the AP doesn't use WMM */
3874 if (!sband->vht_cap.vht_supported ||
3875 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3876 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3878 netdev_info(sdata->dev,
3879 "disabling VHT as WMM/QoS is not supported by the AP\n");
3882 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3883 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3884 sizeof(ifmgd->ht_capa_mask));
3886 if (req->ie && req->ie_len) {
3887 memcpy(assoc_data->ie, req->ie, req->ie_len);
3888 assoc_data->ie_len = req->ie_len;
3891 assoc_data->bss = req->bss;
3893 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3894 if (ifmgd->powersave)
3895 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
3897 sdata->smps_mode = IEEE80211_SMPS_OFF;
3899 sdata->smps_mode = ifmgd->req_smps;
3901 assoc_data->capability = req->bss->capability;
3902 assoc_data->wmm = bss->wmm_used &&
3903 (local->hw.queues >= IEEE80211_NUM_ACS);
3904 assoc_data->supp_rates = bss->supp_rates;
3905 assoc_data->supp_rates_len = bss->supp_rates_len;
3908 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3909 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3910 assoc_data->ap_ht_param =
3911 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3913 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3914 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
3915 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
3916 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
3917 sizeof(struct ieee80211_vht_cap));
3919 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3922 if (bss->wmm_used && bss->uapsd_supported &&
3923 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3924 assoc_data->uapsd = true;
3925 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3927 assoc_data->uapsd = false;
3928 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3931 if (req->prev_bssid)
3932 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3935 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3936 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3938 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3939 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3942 if (req->crypto.control_port)
3943 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3945 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3947 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3948 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3950 /* kick off associate process */
3952 ifmgd->assoc_data = assoc_data;
3953 ifmgd->dtim_period = 0;
3955 err = ieee80211_prep_connection(sdata, req->bss, true);
3959 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3960 const struct cfg80211_bss_ies *beacon_ies;
3963 beacon_ies = rcu_dereference(req->bss->beacon_ies);
3966 * Wait up to one beacon interval ...
3967 * should this be more if we miss one?
3969 sdata_info(sdata, "waiting for beacon from %pM\n",
3971 assoc_data->timeout =
3972 TU_TO_EXP_TIME(req->bss->beacon_interval);
3974 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3977 if (tim_ie && tim_ie[1] >=
3978 sizeof(struct ieee80211_tim_ie)) {
3979 const struct ieee80211_tim_ie *tim;
3980 tim = (void *)(tim_ie + 2);
3981 ifmgd->dtim_period = tim->dtim_period;
3983 assoc_data->have_beacon = true;
3984 assoc_data->sent_assoc = false;
3985 assoc_data->timeout = jiffies;
3989 assoc_data->have_beacon = true;
3990 assoc_data->sent_assoc = false;
3991 assoc_data->timeout = jiffies;
3993 run_again(ifmgd, assoc_data->timeout);
3995 if (bss->corrupt_data) {
3996 char *corrupt_type = "data";
3997 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3998 if (bss->corrupt_data &
3999 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4000 corrupt_type = "beacon and probe response";
4002 corrupt_type = "beacon";
4003 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4004 corrupt_type = "probe response";
4005 sdata_info(sdata, "associating with AP with corrupt %s\n",
4012 memset(ifmgd->bssid, 0, ETH_ALEN);
4013 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4014 ifmgd->assoc_data = NULL;
4018 mutex_unlock(&ifmgd->mtx);
4023 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4024 struct cfg80211_deauth_request *req)
4026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4027 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4028 bool tx = !req->local_state_change;
4029 bool sent_frame = false;
4031 mutex_lock(&ifmgd->mtx);
4034 "deauthenticating from %pM by local choice (reason=%d)\n",
4035 req->bssid, req->reason_code);
4037 if (ifmgd->auth_data) {
4038 drv_mgd_prepare_tx(sdata->local, sdata);
4039 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4040 IEEE80211_STYPE_DEAUTH,
4041 req->reason_code, tx,
4043 ieee80211_destroy_auth_data(sdata, false);
4044 mutex_unlock(&ifmgd->mtx);
4050 if (ifmgd->associated &&
4051 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4052 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4053 req->reason_code, tx, frame_buf);
4056 mutex_unlock(&ifmgd->mtx);
4059 mutex_lock(&sdata->local->mtx);
4060 ieee80211_recalc_idle(sdata->local);
4061 mutex_unlock(&sdata->local->mtx);
4064 __cfg80211_send_deauth(sdata->dev, frame_buf,
4065 IEEE80211_DEAUTH_FRAME_LEN);
4070 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4071 struct cfg80211_disassoc_request *req)
4073 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4075 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4077 mutex_lock(&ifmgd->mtx);
4080 * cfg80211 should catch this ... but it's racy since
4081 * we can receive a disassoc frame, process it, hand it
4082 * to cfg80211 while that's in a locked section already
4083 * trying to tell us that the user wants to disconnect.
4085 if (ifmgd->associated != req->bss) {
4086 mutex_unlock(&ifmgd->mtx);
4091 "disassociating from %pM by local choice (reason=%d)\n",
4092 req->bss->bssid, req->reason_code);
4094 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4095 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4096 req->reason_code, !req->local_state_change,
4098 mutex_unlock(&ifmgd->mtx);
4100 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4101 IEEE80211_DEAUTH_FRAME_LEN);
4103 mutex_lock(&sdata->local->mtx);
4104 ieee80211_recalc_idle(sdata->local);
4105 mutex_unlock(&sdata->local->mtx);
4110 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4112 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4114 mutex_lock(&ifmgd->mtx);
4115 if (ifmgd->assoc_data)
4116 ieee80211_destroy_assoc_data(sdata, false);
4117 if (ifmgd->auth_data)
4118 ieee80211_destroy_auth_data(sdata, false);
4119 del_timer_sync(&ifmgd->timer);
4120 mutex_unlock(&ifmgd->mtx);
4123 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4124 enum nl80211_cqm_rssi_threshold_event rssi_event,
4127 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4129 trace_api_cqm_rssi_notify(sdata, rssi_event);
4131 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4133 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);