2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35 #define IEEE80211_AUTH_MAX_TRIES 3
36 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39 #define IEEE80211_ASSOC_MAX_TRIES 3
41 static int max_nullfunc_tries = 2;
42 module_param(max_nullfunc_tries, int, 0644);
43 MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
46 static int max_probe_tries = 5;
47 module_param(max_probe_tries, int, 0644);
48 MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
59 #define IEEE80211_BEACON_LOSS_COUNT 7
62 * Time the connection can be idle before we probe
63 * it to see if we can still talk to the AP.
65 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
67 * Time we wait for a probe response after sending
68 * a probe request because of beacon loss or for
69 * checking the connection still works.
71 static int probe_wait_ms = 500;
72 module_param(probe_wait_ms, int, 0644);
73 MODULE_PARM_DESC(probe_wait_ms,
74 "Maximum time(ms) to wait for probe response"
75 " before disconnecting (reason 4).");
78 * Weight given to the latest Beacon frame when calculating average signal
79 * strength for Beacon frames received in the current BSS. This must be
82 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
90 #define TMR_RUNNING_TIMER 0
91 #define TMR_RUNNING_CHANSW 1
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
100 /* no action required */
103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
120 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
122 lockdep_assert_held(&ifmgd->mtx);
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
135 static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
137 ASSERT_MGD_MTX(ifmgd);
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
144 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
149 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
152 mod_timer(&sdata->u.mgd.bcn_mon_timer,
153 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
156 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
160 if (unlikely(!sdata->u.mgd.associated))
163 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
166 mod_timer(&sdata->u.mgd.conn_mon_timer,
167 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
169 ifmgd->probe_send_count = 0;
172 static int ecw2cw(int ecw)
174 return (1 << ecw) - 1;
177 static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
178 struct ieee80211_ht_operation *ht_oper,
179 const u8 *bssid, bool reconfig)
181 struct ieee80211_local *local = sdata->local;
182 struct ieee80211_supported_band *sband;
183 struct ieee80211_chanctx_conf *chanctx_conf;
184 struct ieee80211_channel *chan;
185 struct sta_info *sta;
188 bool disable_40 = false;
191 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
192 if (WARN_ON(!chanctx_conf)) {
196 chan = chanctx_conf->def.chan;
198 sband = local->hw.wiphy->bands[chan->band];
200 switch (sdata->vif.bss_conf.chandef.width) {
201 case NL80211_CHAN_WIDTH_40:
202 if (sdata->vif.bss_conf.chandef.chan->center_freq >
203 sdata->vif.bss_conf.chandef.center_freq1 &&
204 chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
206 if (sdata->vif.bss_conf.chandef.chan->center_freq <
207 sdata->vif.bss_conf.chandef.center_freq1 &&
208 chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
215 /* This can change during the lifetime of the BSS */
216 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
219 mutex_lock(&local->sta_mtx);
220 sta = sta_info_get(sdata, bssid);
224 if (sta && !sta->supports_40mhz)
227 if (sta && (!reconfig ||
228 (disable_40 != !(sta->sta.ht_cap.cap &
229 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
232 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
234 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
236 rate_control_rate_update(local, sband, sta,
237 IEEE80211_RC_BW_CHANGED);
239 mutex_unlock(&local->sta_mtx);
241 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
243 /* if bss configuration changed store the new one */
244 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
245 changed |= BSS_CHANGED_HT;
246 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
252 /* frame sending functions */
254 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
255 struct ieee80211_supported_band *sband,
261 for (i = 0; i < supp_rates_len; i++) {
262 int rate = (supp_rates[i] & 0x7F) * 5;
264 for (j = 0; j < sband->n_bitrates; j++)
265 if (sband->bitrates[j].bitrate == rate) {
275 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
276 struct sk_buff *skb, u8 ap_ht_param,
277 struct ieee80211_supported_band *sband,
278 struct ieee80211_channel *channel,
279 enum ieee80211_smps_mode smps)
282 u32 flags = channel->flags;
284 struct ieee80211_sta_ht_cap ht_cap;
286 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
288 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
289 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
291 /* determine capability flags */
294 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
295 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
296 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
297 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
298 cap &= ~IEEE80211_HT_CAP_SGI_40;
301 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
302 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
303 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
304 cap &= ~IEEE80211_HT_CAP_SGI_40;
310 * If 40 MHz was disabled associate as though we weren't
311 * capable of 40 MHz -- some broken APs will never fall
312 * back to trying to transmit in 20 MHz.
314 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
315 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
316 cap &= ~IEEE80211_HT_CAP_SGI_40;
319 /* set SM PS mode properly */
320 cap &= ~IEEE80211_HT_CAP_SM_PS;
322 case IEEE80211_SMPS_AUTOMATIC:
323 case IEEE80211_SMPS_NUM_MODES:
325 case IEEE80211_SMPS_OFF:
326 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
327 IEEE80211_HT_CAP_SM_PS_SHIFT;
329 case IEEE80211_SMPS_STATIC:
330 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
331 IEEE80211_HT_CAP_SM_PS_SHIFT;
333 case IEEE80211_SMPS_DYNAMIC:
334 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
335 IEEE80211_HT_CAP_SM_PS_SHIFT;
339 /* reserve and fill IE */
340 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
341 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
344 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
346 struct ieee80211_supported_band *sband,
347 struct ieee80211_vht_cap *ap_vht_cap)
351 struct ieee80211_sta_vht_cap vht_cap;
354 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
356 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
358 /* determine capability flags */
361 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
362 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
363 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
366 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
367 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
368 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
372 * Some APs apparently get confused if our capabilities are better
373 * than theirs, so restrict what we advertise in the assoc request.
375 if (!(ap_vht_cap->vht_cap_info &
376 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
377 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
379 if (!(ap_vht_cap->vht_cap_info &
380 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
381 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
382 IEEE80211_VHT_CAP_RXSTBC_3 |
383 IEEE80211_VHT_CAP_RXSTBC_4);
385 for (i = 0; i < 8; i++) {
387 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
390 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
392 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
397 if (our_mcs <= ap_mcs)
400 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
401 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
402 vht_cap.vht_mcs.rx_mcs_map |=
403 cpu_to_le16(ap_mcs << shift);
407 /* reserve and fill IE */
408 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
409 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
412 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
414 struct ieee80211_local *local = sdata->local;
415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
416 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
418 struct ieee80211_mgmt *mgmt;
420 size_t offset = 0, noffset;
421 int i, count, rates_len, supp_rates_len;
423 struct ieee80211_supported_band *sband;
424 struct ieee80211_chanctx_conf *chanctx_conf;
425 struct ieee80211_channel *chan;
428 lockdep_assert_held(&ifmgd->mtx);
431 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
432 if (WARN_ON(!chanctx_conf)) {
436 chan = chanctx_conf->def.chan;
438 sband = local->hw.wiphy->bands[chan->band];
440 if (assoc_data->supp_rates_len) {
442 * Get all rates supported by the device and the AP as
443 * some APs don't like getting a superset of their rates
444 * in the association request (e.g. D-Link DAP 1353 in
447 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
448 assoc_data->supp_rates_len,
452 * In case AP not provide any supported rates information
453 * before association, we send information element(s) with
454 * all rates that we support.
457 rates_len = sband->n_bitrates;
460 skb = alloc_skb(local->hw.extra_tx_headroom +
461 sizeof(*mgmt) + /* bit too much but doesn't matter */
462 2 + assoc_data->ssid_len + /* SSID */
463 4 + rates_len + /* (extended) rates */
464 4 + /* power capability */
465 2 + 2 * sband->n_channels + /* supported channels */
466 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
467 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
468 assoc_data->ie_len + /* extra IEs */
474 skb_reserve(skb, local->hw.extra_tx_headroom);
476 capab = WLAN_CAPABILITY_ESS;
478 if (sband->band == IEEE80211_BAND_2GHZ) {
479 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
480 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
481 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
482 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
485 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
486 capab |= WLAN_CAPABILITY_PRIVACY;
488 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
489 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
490 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
492 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
494 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
495 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
496 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
498 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
500 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
501 IEEE80211_STYPE_REASSOC_REQ);
502 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
503 mgmt->u.reassoc_req.listen_interval =
504 cpu_to_le16(local->hw.conf.listen_interval);
505 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
509 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
510 IEEE80211_STYPE_ASSOC_REQ);
511 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
512 mgmt->u.assoc_req.listen_interval =
513 cpu_to_le16(local->hw.conf.listen_interval);
517 pos = skb_put(skb, 2 + assoc_data->ssid_len);
518 *pos++ = WLAN_EID_SSID;
519 *pos++ = assoc_data->ssid_len;
520 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
522 /* add all rates which were marked to be used above */
523 supp_rates_len = rates_len;
524 if (supp_rates_len > 8)
527 pos = skb_put(skb, supp_rates_len + 2);
528 *pos++ = WLAN_EID_SUPP_RATES;
529 *pos++ = supp_rates_len;
532 for (i = 0; i < sband->n_bitrates; i++) {
533 if (BIT(i) & rates) {
534 int rate = sband->bitrates[i].bitrate;
535 *pos++ = (u8) (rate / 5);
541 if (rates_len > count) {
542 pos = skb_put(skb, rates_len - count + 2);
543 *pos++ = WLAN_EID_EXT_SUPP_RATES;
544 *pos++ = rates_len - count;
546 for (i++; i < sband->n_bitrates; i++) {
547 if (BIT(i) & rates) {
548 int rate = sband->bitrates[i].bitrate;
549 *pos++ = (u8) (rate / 5);
554 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
555 /* 1. power capabilities */
556 pos = skb_put(skb, 4);
557 *pos++ = WLAN_EID_PWR_CAPABILITY;
559 *pos++ = 0; /* min tx power */
560 *pos++ = chan->max_power; /* max tx power */
562 /* 2. supported channels */
563 /* TODO: get this in reg domain format */
564 pos = skb_put(skb, 2 * sband->n_channels + 2);
565 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
566 *pos++ = 2 * sband->n_channels;
567 for (i = 0; i < sband->n_channels; i++) {
568 *pos++ = ieee80211_frequency_to_channel(
569 sband->channels[i].center_freq);
570 *pos++ = 1; /* one channel in the subband*/
574 /* if present, add any custom IEs that go before HT */
575 if (assoc_data->ie_len && assoc_data->ie) {
576 static const u8 before_ht[] = {
579 WLAN_EID_EXT_SUPP_RATES,
580 WLAN_EID_PWR_CAPABILITY,
581 WLAN_EID_SUPPORTED_CHANNELS,
584 WLAN_EID_RRM_ENABLED_CAPABILITIES,
585 WLAN_EID_MOBILITY_DOMAIN,
586 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
588 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
589 before_ht, ARRAY_SIZE(before_ht),
591 pos = skb_put(skb, noffset - offset);
592 memcpy(pos, assoc_data->ie + offset, noffset - offset);
596 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
597 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
598 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
600 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
601 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
602 sband, chan, sdata->smps_mode);
604 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
605 ieee80211_add_vht_ie(sdata, skb, sband,
606 &assoc_data->ap_vht_cap);
608 /* if present, add any custom non-vendor IEs that go after HT */
609 if (assoc_data->ie_len && assoc_data->ie) {
610 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
613 pos = skb_put(skb, noffset - offset);
614 memcpy(pos, assoc_data->ie + offset, noffset - offset);
618 if (assoc_data->wmm) {
619 if (assoc_data->uapsd) {
620 qos_info = ifmgd->uapsd_queues;
621 qos_info |= (ifmgd->uapsd_max_sp_len <<
622 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
627 pos = skb_put(skb, 9);
628 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
629 *pos++ = 7; /* len */
630 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
633 *pos++ = 2; /* WME */
634 *pos++ = 0; /* WME info */
635 *pos++ = 1; /* WME ver */
639 /* add any remaining custom (i.e. vendor specific here) IEs */
640 if (assoc_data->ie_len && assoc_data->ie) {
641 noffset = assoc_data->ie_len;
642 pos = skb_put(skb, noffset - offset);
643 memcpy(pos, assoc_data->ie + offset, noffset - offset);
646 drv_mgd_prepare_tx(local, sdata);
648 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
649 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
650 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
651 IEEE80211_TX_INTFL_MLME_CONN_TX;
652 ieee80211_tx_skb(sdata, skb);
655 void ieee80211_send_pspoll(struct ieee80211_local *local,
656 struct ieee80211_sub_if_data *sdata)
658 struct ieee80211_pspoll *pspoll;
661 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
665 pspoll = (struct ieee80211_pspoll *) skb->data;
666 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
668 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
669 ieee80211_tx_skb(sdata, skb);
672 void ieee80211_send_nullfunc(struct ieee80211_local *local,
673 struct ieee80211_sub_if_data *sdata,
677 struct ieee80211_hdr_3addr *nullfunc;
678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
680 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
684 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
686 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
688 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
689 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
690 IEEE80211_STA_CONNECTION_POLL))
691 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
693 ieee80211_tx_skb(sdata, skb);
696 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
697 struct ieee80211_sub_if_data *sdata)
700 struct ieee80211_hdr *nullfunc;
703 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
706 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
710 skb_reserve(skb, local->hw.extra_tx_headroom);
712 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
713 memset(nullfunc, 0, 30);
714 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
715 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
716 nullfunc->frame_control = fc;
717 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
718 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
719 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
720 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
722 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
723 ieee80211_tx_skb(sdata, skb);
726 /* spectrum management related things */
727 static void ieee80211_chswitch_work(struct work_struct *work)
729 struct ieee80211_sub_if_data *sdata =
730 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
731 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
733 if (!ieee80211_sdata_running(sdata))
736 mutex_lock(&ifmgd->mtx);
737 if (!ifmgd->associated)
740 sdata->local->_oper_channel = sdata->local->csa_channel;
741 if (!sdata->local->ops->channel_switch) {
742 /* call "hw_config" only if doing sw channel switch */
743 ieee80211_hw_config(sdata->local,
744 IEEE80211_CONF_CHANGE_CHANNEL);
746 /* update the device channel directly */
747 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
750 /* XXX: shouldn't really modify cfg80211-owned data! */
751 ifmgd->associated->channel = sdata->local->_oper_channel;
753 /* XXX: wait for a beacon first? */
754 ieee80211_wake_queues_by_reason(&sdata->local->hw,
755 IEEE80211_QUEUE_STOP_REASON_CSA);
757 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
758 mutex_unlock(&ifmgd->mtx);
761 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
763 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
764 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
766 trace_api_chswitch_done(sdata, success);
769 "driver channel switch failed, disconnecting\n");
770 ieee80211_queue_work(&sdata->local->hw,
771 &ifmgd->csa_connection_drop_work);
773 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
776 EXPORT_SYMBOL(ieee80211_chswitch_done);
778 static void ieee80211_chswitch_timer(unsigned long data)
780 struct ieee80211_sub_if_data *sdata =
781 (struct ieee80211_sub_if_data *) data;
782 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
784 if (sdata->local->quiescing) {
785 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
789 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
792 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
793 struct ieee80211_channel_sw_ie *sw_elem,
794 struct ieee80211_bss *bss,
797 struct cfg80211_bss *cbss =
798 container_of((void *)bss, struct cfg80211_bss, priv);
799 struct ieee80211_channel *new_ch;
800 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
801 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
802 cbss->channel->band);
803 struct ieee80211_chanctx *chanctx;
805 ASSERT_MGD_MTX(ifmgd);
807 if (!ifmgd->associated)
810 if (sdata->local->scanning)
813 /* Disregard subsequent beacons if we are already running a timer
816 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
819 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
820 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
822 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
823 ifmgd->associated->bssid, new_freq);
824 ieee80211_queue_work(&sdata->local->hw,
825 &ifmgd->csa_connection_drop_work);
829 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
831 if (sdata->local->use_chanctx) {
833 "not handling channel switch with channel contexts\n");
834 ieee80211_queue_work(&sdata->local->hw,
835 &ifmgd->csa_connection_drop_work);
839 mutex_lock(&sdata->local->chanctx_mtx);
840 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
841 mutex_unlock(&sdata->local->chanctx_mtx);
844 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
845 struct ieee80211_chanctx, conf);
846 if (chanctx->refcount > 1) {
848 "channel switch with multiple interfaces on the same channel, disconnecting\n");
849 ieee80211_queue_work(&sdata->local->hw,
850 &ifmgd->csa_connection_drop_work);
851 mutex_unlock(&sdata->local->chanctx_mtx);
854 mutex_unlock(&sdata->local->chanctx_mtx);
856 sdata->local->csa_channel = new_ch;
859 ieee80211_stop_queues_by_reason(&sdata->local->hw,
860 IEEE80211_QUEUE_STOP_REASON_CSA);
862 if (sdata->local->ops->channel_switch) {
863 /* use driver's channel switch callback */
864 struct ieee80211_channel_switch ch_switch = {
865 .timestamp = timestamp,
866 .block_tx = sw_elem->mode,
868 .count = sw_elem->count,
871 drv_channel_switch(sdata->local, &ch_switch);
875 /* channel switch handled in software */
876 if (sw_elem->count <= 1)
877 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
879 mod_timer(&ifmgd->chswitch_timer,
880 TU_TO_EXP_TIME(sw_elem->count *
881 cbss->beacon_interval));
884 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
885 struct ieee80211_channel *channel,
886 const u8 *country_ie, u8 country_ie_len,
887 const u8 *pwr_constr_elem)
889 struct ieee80211_country_ie_triplet *triplet;
890 int chan = ieee80211_frequency_to_channel(channel->center_freq);
891 int i, chan_pwr, chan_increment, new_ap_level;
892 bool have_chan_pwr = false;
895 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
898 triplet = (void *)(country_ie + 3);
901 switch (channel->band) {
905 case IEEE80211_BAND_2GHZ:
906 case IEEE80211_BAND_60GHZ:
909 case IEEE80211_BAND_5GHZ:
915 while (country_ie_len >= 3) {
916 u8 first_channel = triplet->chans.first_channel;
918 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
921 for (i = 0; i < triplet->chans.num_channels; i++) {
922 if (first_channel + i * chan_increment == chan) {
923 have_chan_pwr = true;
924 chan_pwr = triplet->chans.max_power;
939 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
941 if (sdata->ap_power_level == new_ap_level)
945 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
946 new_ap_level, chan_pwr, *pwr_constr_elem,
948 sdata->ap_power_level = new_ap_level;
949 if (__ieee80211_recalc_txpower(sdata))
950 return BSS_CHANGED_TXPOWER;
954 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
956 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
957 struct ieee80211_local *local = sdata->local;
958 struct ieee80211_conf *conf = &local->hw.conf;
960 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
961 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
962 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
964 local->disable_dynamic_ps = false;
965 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
967 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
969 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
971 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
972 struct ieee80211_local *local = sdata->local;
973 struct ieee80211_conf *conf = &local->hw.conf;
975 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
976 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
977 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
979 local->disable_dynamic_ps = true;
980 conf->dynamic_ps_timeout = 0;
981 del_timer_sync(&local->dynamic_ps_timer);
982 ieee80211_queue_work(&local->hw,
983 &local->dynamic_ps_enable_work);
985 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
988 static void ieee80211_enable_ps(struct ieee80211_local *local,
989 struct ieee80211_sub_if_data *sdata)
991 struct ieee80211_conf *conf = &local->hw.conf;
994 * If we are scanning right now then the parameters will
995 * take effect when scan finishes.
1000 if (conf->dynamic_ps_timeout > 0 &&
1001 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1002 mod_timer(&local->dynamic_ps_timer, jiffies +
1003 msecs_to_jiffies(conf->dynamic_ps_timeout));
1005 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1006 ieee80211_send_nullfunc(local, sdata, 1);
1008 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1009 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1012 conf->flags |= IEEE80211_CONF_PS;
1013 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1017 static void ieee80211_change_ps(struct ieee80211_local *local)
1019 struct ieee80211_conf *conf = &local->hw.conf;
1021 if (local->ps_sdata) {
1022 ieee80211_enable_ps(local, local->ps_sdata);
1023 } else if (conf->flags & IEEE80211_CONF_PS) {
1024 conf->flags &= ~IEEE80211_CONF_PS;
1025 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1026 del_timer_sync(&local->dynamic_ps_timer);
1027 cancel_work_sync(&local->dynamic_ps_enable_work);
1031 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1033 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1034 struct sta_info *sta = NULL;
1035 bool authorized = false;
1037 if (!mgd->powersave)
1043 if (!mgd->associated)
1046 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1047 IEEE80211_STA_CONNECTION_POLL))
1051 sta = sta_info_get(sdata, mgd->bssid);
1053 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1059 /* need to hold RTNL or interface lock */
1060 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1062 struct ieee80211_sub_if_data *sdata, *found = NULL;
1066 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1067 local->ps_sdata = NULL;
1071 list_for_each_entry(sdata, &local->interfaces, list) {
1072 if (!ieee80211_sdata_running(sdata))
1074 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1075 /* If an AP vif is found, then disable PS
1076 * by setting the count to zero thereby setting
1082 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1088 if (count == 1 && ieee80211_powersave_allowed(found)) {
1089 struct ieee80211_conf *conf = &local->hw.conf;
1093 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1095 beaconint_us = ieee80211_tu_to_usec(
1096 found->vif.bss_conf.beacon_int);
1098 timeout = local->dynamic_ps_forced_timeout;
1101 * Go to full PSM if the user configures a very low
1102 * latency requirement.
1103 * The 2000 second value is there for compatibility
1104 * until the PM_QOS_NETWORK_LATENCY is configured
1107 if (latency > (1900 * USEC_PER_MSEC) &&
1108 latency != (2000 * USEC_PER_SEC))
1113 local->dynamic_ps_user_timeout = timeout;
1114 if (!local->disable_dynamic_ps)
1115 conf->dynamic_ps_timeout =
1116 local->dynamic_ps_user_timeout;
1118 if (beaconint_us > latency) {
1119 local->ps_sdata = NULL;
1122 u8 dtimper = found->u.mgd.dtim_period;
1124 /* If the TIM IE is invalid, pretend the value is 1 */
1127 else if (dtimper > 1)
1128 maxslp = min_t(int, dtimper,
1129 latency / beaconint_us);
1131 local->hw.conf.max_sleep_period = maxslp;
1132 local->hw.conf.ps_dtim_period = dtimper;
1133 local->ps_sdata = found;
1136 local->ps_sdata = NULL;
1139 ieee80211_change_ps(local);
1142 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1144 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1146 if (sdata->vif.bss_conf.ps != ps_allowed) {
1147 sdata->vif.bss_conf.ps = ps_allowed;
1148 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1152 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1154 struct ieee80211_local *local =
1155 container_of(work, struct ieee80211_local,
1156 dynamic_ps_disable_work);
1158 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1159 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1160 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1163 ieee80211_wake_queues_by_reason(&local->hw,
1164 IEEE80211_QUEUE_STOP_REASON_PS);
1167 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1169 struct ieee80211_local *local =
1170 container_of(work, struct ieee80211_local,
1171 dynamic_ps_enable_work);
1172 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1173 struct ieee80211_if_managed *ifmgd;
1174 unsigned long flags;
1177 /* can only happen when PS was just disabled anyway */
1181 ifmgd = &sdata->u.mgd;
1183 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1186 if (!local->disable_dynamic_ps &&
1187 local->hw.conf.dynamic_ps_timeout > 0) {
1188 /* don't enter PS if TX frames are pending */
1189 if (drv_tx_frames_pending(local)) {
1190 mod_timer(&local->dynamic_ps_timer, jiffies +
1192 local->hw.conf.dynamic_ps_timeout));
1197 * transmission can be stopped by others which leads to
1198 * dynamic_ps_timer expiry. Postpone the ps timer if it
1199 * is not the actual idle state.
1201 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1202 for (q = 0; q < local->hw.queues; q++) {
1203 if (local->queue_stop_reasons[q]) {
1204 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1206 mod_timer(&local->dynamic_ps_timer, jiffies +
1208 local->hw.conf.dynamic_ps_timeout));
1212 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1215 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1216 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1217 netif_tx_stop_all_queues(sdata->dev);
1219 if (drv_tx_frames_pending(local))
1220 mod_timer(&local->dynamic_ps_timer, jiffies +
1222 local->hw.conf.dynamic_ps_timeout));
1224 ieee80211_send_nullfunc(local, sdata, 1);
1225 /* Flush to get the tx status of nullfunc frame */
1226 drv_flush(local, false);
1230 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1231 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1232 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1233 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1234 local->hw.conf.flags |= IEEE80211_CONF_PS;
1235 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1238 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1239 netif_tx_wake_all_queues(sdata->dev);
1242 void ieee80211_dynamic_ps_timer(unsigned long data)
1244 struct ieee80211_local *local = (void *) data;
1246 if (local->quiescing || local->suspended)
1249 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1253 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1254 struct ieee80211_sub_if_data *sdata,
1255 u8 *wmm_param, size_t wmm_param_len)
1257 struct ieee80211_tx_queue_params params;
1258 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1261 u8 *pos, uapsd_queues = 0;
1263 if (!local->ops->conf_tx)
1266 if (local->hw.queues < IEEE80211_NUM_ACS)
1272 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1275 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1276 uapsd_queues = ifmgd->uapsd_queues;
1278 count = wmm_param[6] & 0x0f;
1279 if (count == ifmgd->wmm_last_param_set)
1281 ifmgd->wmm_last_param_set = count;
1283 pos = wmm_param + 8;
1284 left = wmm_param_len - 8;
1286 memset(¶ms, 0, sizeof(params));
1289 for (; left >= 4; left -= 4, pos += 4) {
1290 int aci = (pos[0] >> 5) & 0x03;
1291 int acm = (pos[0] >> 4) & 0x01;
1299 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1300 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1306 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1307 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1313 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1314 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1321 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1322 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1327 params.aifs = pos[0] & 0x0f;
1328 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1329 params.cw_min = ecw2cw(pos[1] & 0x0f);
1330 params.txop = get_unaligned_le16(pos + 2);
1331 params.uapsd = uapsd;
1334 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1336 params.aifs, params.cw_min, params.cw_max,
1337 params.txop, params.uapsd);
1338 sdata->tx_conf[queue] = params;
1339 if (drv_conf_tx(local, sdata, queue, ¶ms))
1341 "failed to set TX queue parameters for queue %d\n",
1345 /* enable WMM or activate new settings */
1346 sdata->vif.bss_conf.qos = true;
1350 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1352 lockdep_assert_held(&sdata->local->mtx);
1354 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1355 IEEE80211_STA_BEACON_POLL);
1356 ieee80211_run_deferred_scan(sdata->local);
1359 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1361 mutex_lock(&sdata->local->mtx);
1362 __ieee80211_stop_poll(sdata);
1363 mutex_unlock(&sdata->local->mtx);
1366 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1367 u16 capab, bool erp_valid, u8 erp)
1369 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1371 bool use_protection;
1372 bool use_short_preamble;
1373 bool use_short_slot;
1376 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1377 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1379 use_protection = false;
1380 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1383 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1384 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1385 use_short_slot = true;
1387 if (use_protection != bss_conf->use_cts_prot) {
1388 bss_conf->use_cts_prot = use_protection;
1389 changed |= BSS_CHANGED_ERP_CTS_PROT;
1392 if (use_short_preamble != bss_conf->use_short_preamble) {
1393 bss_conf->use_short_preamble = use_short_preamble;
1394 changed |= BSS_CHANGED_ERP_PREAMBLE;
1397 if (use_short_slot != bss_conf->use_short_slot) {
1398 bss_conf->use_short_slot = use_short_slot;
1399 changed |= BSS_CHANGED_ERP_SLOT;
1405 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1406 struct cfg80211_bss *cbss,
1407 u32 bss_info_changed)
1409 struct ieee80211_bss *bss = (void *)cbss->priv;
1410 struct ieee80211_local *local = sdata->local;
1411 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1413 bss_info_changed |= BSS_CHANGED_ASSOC;
1414 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1415 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1417 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1418 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1420 sdata->u.mgd.associated = cbss;
1421 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1423 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1425 if (sdata->vif.p2p) {
1426 const struct cfg80211_bss_ies *ies;
1429 ies = rcu_dereference(cbss->ies);
1434 ret = cfg80211_get_p2p_attr(
1435 ies->data, ies->len,
1436 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1439 bss_conf->p2p_oppps = noa[1] & 0x80;
1440 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1441 bss_info_changed |= BSS_CHANGED_P2P_PS;
1442 sdata->u.mgd.p2p_noa_index = noa[0];
1448 /* just to be sure */
1449 ieee80211_stop_poll(sdata);
1451 ieee80211_led_assoc(local, 1);
1453 if (sdata->u.mgd.assoc_data->have_beacon) {
1455 * If the AP is buggy we may get here with no DTIM period
1456 * known, so assume it's 1 which is the only safe assumption
1457 * in that case, although if the TIM IE is broken powersave
1458 * probably just won't work at all.
1460 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1461 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
1463 bss_conf->dtim_period = 0;
1466 bss_conf->assoc = 1;
1468 /* Tell the driver to monitor connection quality (if supported) */
1469 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1470 bss_conf->cqm_rssi_thold)
1471 bss_info_changed |= BSS_CHANGED_CQM;
1473 /* Enable ARP filtering */
1474 if (bss_conf->arp_addr_cnt)
1475 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1477 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1479 mutex_lock(&local->iflist_mtx);
1480 ieee80211_recalc_ps(local, -1);
1481 mutex_unlock(&local->iflist_mtx);
1483 ieee80211_recalc_smps(sdata);
1484 ieee80211_recalc_ps_vif(sdata);
1486 netif_tx_start_all_queues(sdata->dev);
1487 netif_carrier_on(sdata->dev);
1490 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1491 u16 stype, u16 reason, bool tx,
1494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1495 struct ieee80211_local *local = sdata->local;
1498 ASSERT_MGD_MTX(ifmgd);
1500 if (WARN_ON_ONCE(tx && !frame_buf))
1503 if (WARN_ON(!ifmgd->associated))
1506 ieee80211_stop_poll(sdata);
1508 ifmgd->associated = NULL;
1511 * we need to commit the associated = NULL change because the
1512 * scan code uses that to determine whether this iface should
1513 * go to/wake up from powersave or not -- and could otherwise
1514 * wake the queues erroneously.
1519 * Thus, we can only afterwards stop the queues -- to account
1520 * for the case where another CPU is finishing a scan at this
1521 * time -- we don't want the scan code to enable queues.
1524 netif_tx_stop_all_queues(sdata->dev);
1525 netif_carrier_off(sdata->dev);
1528 * if we want to get out of ps before disassoc (why?) we have
1529 * to do it before sending disassoc, as otherwise the null-packet
1532 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1533 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1534 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1536 local->ps_sdata = NULL;
1538 /* disable per-vif ps */
1539 ieee80211_recalc_ps_vif(sdata);
1541 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1543 drv_flush(local, false);
1545 /* deauthenticate/disassociate now */
1546 if (tx || frame_buf)
1547 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1548 reason, tx, frame_buf);
1550 /* flush out frame */
1552 drv_flush(local, false);
1554 /* clear bssid only after building the needed mgmt frames */
1555 memset(ifmgd->bssid, 0, ETH_ALEN);
1557 /* remove AP and TDLS peers */
1558 sta_info_flush_defer(sdata);
1560 /* finally reset all BSS / config parameters */
1561 changed |= ieee80211_reset_erp_info(sdata);
1563 ieee80211_led_assoc(local, 0);
1564 changed |= BSS_CHANGED_ASSOC;
1565 sdata->vif.bss_conf.assoc = false;
1567 sdata->vif.bss_conf.p2p_ctwindow = 0;
1568 sdata->vif.bss_conf.p2p_oppps = false;
1570 /* on the next assoc, re-program HT parameters */
1571 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1572 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1574 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1576 del_timer_sync(&local->dynamic_ps_timer);
1577 cancel_work_sync(&local->dynamic_ps_enable_work);
1579 /* Disable ARP filtering */
1580 if (sdata->vif.bss_conf.arp_addr_cnt)
1581 changed |= BSS_CHANGED_ARP_FILTER;
1583 sdata->vif.bss_conf.qos = false;
1584 changed |= BSS_CHANGED_QOS;
1586 /* The BSSID (not really interesting) and HT changed */
1587 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1588 ieee80211_bss_info_change_notify(sdata, changed);
1590 /* disassociated - set to defaults now */
1591 ieee80211_set_wmm_default(sdata, false);
1593 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1594 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1595 del_timer_sync(&sdata->u.mgd.timer);
1596 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1598 sdata->u.mgd.timers_running = 0;
1600 sdata->vif.bss_conf.dtim_period = 0;
1603 ieee80211_vif_release_channel(sdata);
1606 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1607 struct ieee80211_hdr *hdr)
1610 * We can postpone the mgd.timer whenever receiving unicast frames
1611 * from AP because we know that the connection is working both ways
1612 * at that time. But multicast frames (and hence also beacons) must
1613 * be ignored here, because we need to trigger the timer during
1614 * data idle periods for sending the periodic probe request to the
1615 * AP we're connected to.
1617 if (is_multicast_ether_addr(hdr->addr1))
1620 ieee80211_sta_reset_conn_monitor(sdata);
1623 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1625 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1626 struct ieee80211_local *local = sdata->local;
1628 mutex_lock(&local->mtx);
1629 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1630 IEEE80211_STA_CONNECTION_POLL))) {
1631 mutex_unlock(&local->mtx);
1635 __ieee80211_stop_poll(sdata);
1637 mutex_lock(&local->iflist_mtx);
1638 ieee80211_recalc_ps(local, -1);
1639 mutex_unlock(&local->iflist_mtx);
1641 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1645 * We've received a probe response, but are not sure whether
1646 * we have or will be receiving any beacons or data, so let's
1647 * schedule the timers again, just in case.
1649 ieee80211_sta_reset_beacon_monitor(sdata);
1651 mod_timer(&ifmgd->conn_mon_timer,
1652 round_jiffies_up(jiffies +
1653 IEEE80211_CONNECTION_IDLE_TIME));
1655 mutex_unlock(&local->mtx);
1658 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1659 struct ieee80211_hdr *hdr, bool ack)
1661 if (!ieee80211_is_data(hdr->frame_control))
1665 ieee80211_sta_reset_conn_monitor(sdata);
1667 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1668 sdata->u.mgd.probe_send_count > 0) {
1670 sdata->u.mgd.probe_send_count = 0;
1672 sdata->u.mgd.nullfunc_failed = true;
1673 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1677 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1679 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1681 u8 *dst = ifmgd->associated->bssid;
1682 u8 unicast_limit = max(1, max_probe_tries - 3);
1685 * Try sending broadcast probe requests for the last three
1686 * probe requests after the first ones failed since some
1687 * buggy APs only support broadcast probe requests.
1689 if (ifmgd->probe_send_count >= unicast_limit)
1693 * When the hardware reports an accurate Tx ACK status, it's
1694 * better to send a nullfunc frame instead of a probe request,
1695 * as it will kick us off the AP quickly if we aren't associated
1696 * anymore. The timeout will be reset if the frame is ACKed by
1699 ifmgd->probe_send_count++;
1701 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1702 ifmgd->nullfunc_failed = false;
1703 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1708 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1709 if (WARN_ON_ONCE(ssid == NULL))
1714 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1715 0, (u32) -1, true, 0,
1716 ifmgd->associated->channel, false);
1720 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1721 run_again(ifmgd, ifmgd->probe_timeout);
1722 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1723 drv_flush(sdata->local, false);
1726 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1729 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1730 bool already = false;
1732 if (!ieee80211_sdata_running(sdata))
1735 mutex_lock(&ifmgd->mtx);
1737 if (!ifmgd->associated)
1740 mutex_lock(&sdata->local->mtx);
1742 if (sdata->local->tmp_channel || sdata->local->scanning) {
1743 mutex_unlock(&sdata->local->mtx);
1748 mlme_dbg_ratelimited(sdata,
1749 "detected beacon loss from AP - sending probe request\n");
1751 ieee80211_cqm_rssi_notify(&sdata->vif,
1752 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
1755 * The driver/our work has already reported this event or the
1756 * connection monitoring has kicked in and we have already sent
1757 * a probe request. Or maybe the AP died and the driver keeps
1758 * reporting until we disassociate...
1760 * In either case we have to ignore the current call to this
1761 * function (except for setting the correct probe reason bit)
1762 * because otherwise we would reset the timer every time and
1763 * never check whether we received a probe response!
1765 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1766 IEEE80211_STA_CONNECTION_POLL))
1770 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1772 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1774 mutex_unlock(&sdata->local->mtx);
1779 mutex_lock(&sdata->local->iflist_mtx);
1780 ieee80211_recalc_ps(sdata->local, -1);
1781 mutex_unlock(&sdata->local->iflist_mtx);
1783 ifmgd->probe_send_count = 0;
1784 ieee80211_mgd_probe_ap_send(sdata);
1786 mutex_unlock(&ifmgd->mtx);
1789 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1790 struct ieee80211_vif *vif)
1792 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1793 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1794 struct cfg80211_bss *cbss;
1795 struct sk_buff *skb;
1799 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1802 ASSERT_MGD_MTX(ifmgd);
1804 if (ifmgd->associated)
1805 cbss = ifmgd->associated;
1806 else if (ifmgd->auth_data)
1807 cbss = ifmgd->auth_data->bss;
1808 else if (ifmgd->assoc_data)
1809 cbss = ifmgd->assoc_data->bss;
1814 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
1815 if (WARN_ON_ONCE(ssid == NULL))
1820 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
1821 (u32) -1, cbss->channel,
1828 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1830 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1832 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1833 struct ieee80211_local *local = sdata->local;
1834 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1836 mutex_lock(&ifmgd->mtx);
1837 if (!ifmgd->associated) {
1838 mutex_unlock(&ifmgd->mtx);
1842 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1843 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1845 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1846 mutex_unlock(&ifmgd->mtx);
1849 * must be outside lock due to cfg80211,
1850 * but that's not a problem.
1852 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1854 mutex_lock(&local->mtx);
1855 ieee80211_recalc_idle(local);
1856 mutex_unlock(&local->mtx);
1859 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1861 struct ieee80211_sub_if_data *sdata =
1862 container_of(work, struct ieee80211_sub_if_data,
1863 u.mgd.beacon_connection_loss_work);
1864 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1865 struct sta_info *sta;
1867 if (ifmgd->associated) {
1869 sta = sta_info_get(sdata, ifmgd->bssid);
1871 sta->beacon_loss_count++;
1875 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1876 sdata_info(sdata, "Connection to AP %pM lost\n",
1878 __ieee80211_disconnect(sdata);
1880 ieee80211_mgd_probe_ap(sdata, true);
1884 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1886 struct ieee80211_sub_if_data *sdata =
1887 container_of(work, struct ieee80211_sub_if_data,
1888 u.mgd.csa_connection_drop_work);
1890 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1891 IEEE80211_QUEUE_STOP_REASON_CSA);
1892 __ieee80211_disconnect(sdata);
1895 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1897 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1898 struct ieee80211_hw *hw = &sdata->local->hw;
1900 trace_api_beacon_loss(sdata);
1902 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1903 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1905 EXPORT_SYMBOL(ieee80211_beacon_loss);
1907 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1909 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1910 struct ieee80211_hw *hw = &sdata->local->hw;
1912 trace_api_connection_loss(sdata);
1914 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1915 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1917 EXPORT_SYMBOL(ieee80211_connection_loss);
1920 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1923 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1925 lockdep_assert_held(&sdata->u.mgd.mtx);
1928 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1930 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1931 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1932 sdata->u.mgd.flags = 0;
1933 ieee80211_vif_release_channel(sdata);
1936 cfg80211_put_bss(auth_data->bss);
1938 sdata->u.mgd.auth_data = NULL;
1941 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1942 struct ieee80211_mgmt *mgmt, size_t len)
1944 struct ieee80211_local *local = sdata->local;
1945 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1947 struct ieee802_11_elems elems;
1950 pos = mgmt->u.auth.variable;
1951 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1952 if (!elems.challenge)
1954 auth_data->expected_transaction = 4;
1955 drv_mgd_prepare_tx(sdata->local, sdata);
1956 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1957 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
1958 IEEE80211_TX_INTFL_MLME_CONN_TX;
1959 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
1960 elems.challenge - 2, elems.challenge_len + 2,
1961 auth_data->bss->bssid, auth_data->bss->bssid,
1962 auth_data->key, auth_data->key_len,
1963 auth_data->key_idx, tx_flags);
1966 static enum rx_mgmt_action __must_check
1967 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1968 struct ieee80211_mgmt *mgmt, size_t len)
1970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1972 u16 auth_alg, auth_transaction, status_code;
1973 struct sta_info *sta;
1975 lockdep_assert_held(&ifmgd->mtx);
1978 return RX_MGMT_NONE;
1980 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1981 return RX_MGMT_NONE;
1983 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1985 if (!ether_addr_equal(bssid, mgmt->bssid))
1986 return RX_MGMT_NONE;
1988 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1989 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1990 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1992 if (auth_alg != ifmgd->auth_data->algorithm ||
1993 auth_transaction != ifmgd->auth_data->expected_transaction) {
1994 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1995 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1997 ifmgd->auth_data->expected_transaction);
1998 return RX_MGMT_NONE;
2001 if (status_code != WLAN_STATUS_SUCCESS) {
2002 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2003 mgmt->sa, status_code);
2004 ieee80211_destroy_auth_data(sdata, false);
2005 return RX_MGMT_CFG80211_RX_AUTH;
2008 switch (ifmgd->auth_data->algorithm) {
2009 case WLAN_AUTH_OPEN:
2010 case WLAN_AUTH_LEAP:
2014 case WLAN_AUTH_SHARED_KEY:
2015 if (ifmgd->auth_data->expected_transaction != 4) {
2016 ieee80211_auth_challenge(sdata, mgmt, len);
2017 /* need another frame */
2018 return RX_MGMT_NONE;
2022 WARN_ONCE(1, "invalid auth alg %d",
2023 ifmgd->auth_data->algorithm);
2024 return RX_MGMT_NONE;
2027 sdata_info(sdata, "authenticated\n");
2028 ifmgd->auth_data->done = true;
2029 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2030 run_again(ifmgd, ifmgd->auth_data->timeout);
2032 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2033 ifmgd->auth_data->expected_transaction != 2) {
2035 * Report auth frame to user space for processing since another
2036 * round of Authentication frames is still needed.
2038 return RX_MGMT_CFG80211_RX_AUTH;
2041 /* move station state to auth */
2042 mutex_lock(&sdata->local->sta_mtx);
2043 sta = sta_info_get(sdata, bssid);
2045 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2048 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2049 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2052 mutex_unlock(&sdata->local->sta_mtx);
2054 return RX_MGMT_CFG80211_RX_AUTH;
2056 mutex_unlock(&sdata->local->sta_mtx);
2057 /* ignore frame -- wait for timeout */
2058 return RX_MGMT_NONE;
2062 static enum rx_mgmt_action __must_check
2063 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2064 struct ieee80211_mgmt *mgmt, size_t len)
2066 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2067 const u8 *bssid = NULL;
2070 lockdep_assert_held(&ifmgd->mtx);
2073 return RX_MGMT_NONE;
2075 if (!ifmgd->associated ||
2076 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2077 return RX_MGMT_NONE;
2079 bssid = ifmgd->associated->bssid;
2081 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2083 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2084 bssid, reason_code);
2086 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2088 mutex_lock(&sdata->local->mtx);
2089 ieee80211_recalc_idle(sdata->local);
2090 mutex_unlock(&sdata->local->mtx);
2092 return RX_MGMT_CFG80211_DEAUTH;
2096 static enum rx_mgmt_action __must_check
2097 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2098 struct ieee80211_mgmt *mgmt, size_t len)
2100 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2103 lockdep_assert_held(&ifmgd->mtx);
2106 return RX_MGMT_NONE;
2108 if (!ifmgd->associated ||
2109 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2110 return RX_MGMT_NONE;
2112 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2114 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2115 mgmt->sa, reason_code);
2117 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2119 mutex_lock(&sdata->local->mtx);
2120 ieee80211_recalc_idle(sdata->local);
2121 mutex_unlock(&sdata->local->mtx);
2123 return RX_MGMT_CFG80211_DISASSOC;
2126 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2127 u8 *supp_rates, unsigned int supp_rates_len,
2128 u32 *rates, u32 *basic_rates,
2129 bool *have_higher_than_11mbit,
2130 int *min_rate, int *min_rate_index)
2134 for (i = 0; i < supp_rates_len; i++) {
2135 int rate = (supp_rates[i] & 0x7f) * 5;
2136 bool is_basic = !!(supp_rates[i] & 0x80);
2139 *have_higher_than_11mbit = true;
2142 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2143 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2145 * Note: Even through the membership selector and the basic
2146 * rate flag share the same bit, they are not exactly
2149 if (!!(supp_rates[i] & 0x80) &&
2150 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2153 for (j = 0; j < sband->n_bitrates; j++) {
2154 if (sband->bitrates[j].bitrate == rate) {
2157 *basic_rates |= BIT(j);
2158 if (rate < *min_rate) {
2160 *min_rate_index = j;
2168 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2171 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2173 lockdep_assert_held(&sdata->u.mgd.mtx);
2176 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2178 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2179 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2180 sdata->u.mgd.flags = 0;
2181 ieee80211_vif_release_channel(sdata);
2185 sdata->u.mgd.assoc_data = NULL;
2188 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2189 struct cfg80211_bss *cbss,
2190 struct ieee80211_mgmt *mgmt, size_t len)
2192 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2193 struct ieee80211_local *local = sdata->local;
2194 struct ieee80211_supported_band *sband;
2195 struct sta_info *sta;
2197 u16 capab_info, aid;
2198 struct ieee802_11_elems elems;
2199 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2203 /* AssocResp and ReassocResp have identical structure */
2205 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2206 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2208 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2209 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2211 aid &= ~(BIT(15) | BIT(14));
2213 ifmgd->broken_ap = false;
2215 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2216 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2219 ifmgd->broken_ap = true;
2222 pos = mgmt->u.assoc_resp.variable;
2223 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2225 if (!elems.supp_rates) {
2226 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2232 mutex_lock(&sdata->local->sta_mtx);
2234 * station info was already allocated and inserted before
2235 * the association and should be available to us
2237 sta = sta_info_get(sdata, cbss->bssid);
2238 if (WARN_ON(!sta)) {
2239 mutex_unlock(&sdata->local->sta_mtx);
2243 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2245 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2246 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2247 elems.ht_cap_elem, &sta->sta.ht_cap);
2249 sta->supports_40mhz =
2250 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2252 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2253 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2257 rate_control_rate_init(sta);
2259 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2260 set_sta_flag(sta, WLAN_STA_MFP);
2262 if (elems.wmm_param)
2263 set_sta_flag(sta, WLAN_STA_WME);
2265 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2267 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2268 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2269 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2272 "failed to move station %pM to desired state\n",
2274 WARN_ON(__sta_info_destroy(sta));
2275 mutex_unlock(&sdata->local->sta_mtx);
2279 mutex_unlock(&sdata->local->sta_mtx);
2282 * Always handle WMM once after association regardless
2283 * of the first value the AP uses. Setting -1 here has
2284 * that effect because the AP values is an unsigned
2287 ifmgd->wmm_last_param_set = -1;
2289 if (elems.wmm_param)
2290 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2291 elems.wmm_param_len);
2293 ieee80211_set_wmm_default(sdata, false);
2294 changed |= BSS_CHANGED_QOS;
2296 if (elems.ht_operation && elems.wmm_param &&
2297 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2298 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2299 cbss->bssid, false);
2301 /* set AID and assoc capability,
2302 * ieee80211_set_associated() will tell the driver */
2303 bss_conf->aid = aid;
2304 bss_conf->assoc_capability = capab_info;
2305 ieee80211_set_associated(sdata, cbss, changed);
2308 * If we're using 4-addr mode, let the AP know that we're
2309 * doing so, so that it can create the STA VLAN on its side
2311 if (ifmgd->use_4addr)
2312 ieee80211_send_4addr_nullfunc(local, sdata);
2315 * Start timer to probe the connection to the AP now.
2316 * Also start the timer that will detect beacon loss.
2318 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2319 ieee80211_sta_reset_beacon_monitor(sdata);
2324 static enum rx_mgmt_action __must_check
2325 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2326 struct ieee80211_mgmt *mgmt, size_t len,
2327 struct cfg80211_bss **bss)
2329 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2330 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2331 u16 capab_info, status_code, aid;
2332 struct ieee802_11_elems elems;
2336 lockdep_assert_held(&ifmgd->mtx);
2339 return RX_MGMT_NONE;
2340 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2341 return RX_MGMT_NONE;
2344 * AssocResp and ReassocResp have identical structure, so process both
2345 * of them in this function.
2349 return RX_MGMT_NONE;
2351 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2352 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2353 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2354 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2357 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2358 reassoc ? "Rea" : "A", mgmt->sa,
2359 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2361 pos = mgmt->u.assoc_resp.variable;
2362 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2364 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2365 elems.timeout_int && elems.timeout_int_len == 5 &&
2366 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2368 tu = get_unaligned_le32(elems.timeout_int + 1);
2369 ms = tu * 1024 / 1000;
2371 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2373 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2374 if (ms > IEEE80211_ASSOC_TIMEOUT)
2375 run_again(ifmgd, assoc_data->timeout);
2376 return RX_MGMT_NONE;
2379 *bss = assoc_data->bss;
2381 if (status_code != WLAN_STATUS_SUCCESS) {
2382 sdata_info(sdata, "%pM denied association (code=%d)\n",
2383 mgmt->sa, status_code);
2384 ieee80211_destroy_assoc_data(sdata, false);
2386 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2387 /* oops -- internal error -- send timeout for now */
2388 ieee80211_destroy_assoc_data(sdata, false);
2389 cfg80211_put_bss(*bss);
2390 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2392 sdata_info(sdata, "associated\n");
2395 * destroy assoc_data afterwards, as otherwise an idle
2396 * recalc after assoc_data is NULL but before associated
2397 * is set can cause the interface to go idle
2399 ieee80211_destroy_assoc_data(sdata, true);
2402 return RX_MGMT_CFG80211_RX_ASSOC;
2405 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2406 struct ieee80211_mgmt *mgmt, size_t len,
2407 struct ieee80211_rx_status *rx_status,
2408 struct ieee802_11_elems *elems)
2410 struct ieee80211_local *local = sdata->local;
2412 struct ieee80211_bss *bss;
2413 struct ieee80211_channel *channel;
2414 bool need_ps = false;
2416 if ((sdata->u.mgd.associated &&
2417 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2418 (sdata->u.mgd.assoc_data &&
2419 ether_addr_equal(mgmt->bssid,
2420 sdata->u.mgd.assoc_data->bss->bssid))) {
2421 /* not previously set so we may need to recalc */
2422 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2424 if (elems->tim && !elems->parse_error) {
2425 struct ieee80211_tim_ie *tim_ie = elems->tim;
2426 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2430 if (elems->ds_params && elems->ds_params_len == 1)
2431 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2434 freq = rx_status->freq;
2436 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2438 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2441 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2444 ieee80211_rx_bss_put(local, bss);
2446 if (!sdata->u.mgd.associated)
2450 mutex_lock(&local->iflist_mtx);
2451 ieee80211_recalc_ps(local, -1);
2452 mutex_unlock(&local->iflist_mtx);
2455 if (elems->ch_switch_ie &&
2456 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2457 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
2458 bss, rx_status->mactime);
2462 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2463 struct sk_buff *skb)
2465 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2466 struct ieee80211_if_managed *ifmgd;
2467 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2468 size_t baselen, len = skb->len;
2469 struct ieee802_11_elems elems;
2471 ifmgd = &sdata->u.mgd;
2473 ASSERT_MGD_MTX(ifmgd);
2475 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2476 return; /* ignore ProbeResp to foreign address */
2478 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2482 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2485 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2487 if (ifmgd->associated &&
2488 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2489 ieee80211_reset_ap_probe(sdata);
2491 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2492 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2493 /* got probe response, continue with auth */
2494 sdata_info(sdata, "direct probe responded\n");
2495 ifmgd->auth_data->tries = 0;
2496 ifmgd->auth_data->timeout = jiffies;
2497 run_again(ifmgd, ifmgd->auth_data->timeout);
2502 * This is the canonical list of information elements we care about,
2503 * the filter code also gives us all changes to the Microsoft OUI
2504 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2506 * We implement beacon filtering in software since that means we can
2507 * avoid processing the frame here and in cfg80211, and userspace
2508 * will not be able to tell whether the hardware supports it or not.
2510 * XXX: This list needs to be dynamic -- userspace needs to be able to
2511 * add items it requires. It also needs to be able to tell us to
2512 * look out for other vendor IEs.
2514 static const u64 care_about_ies =
2515 (1ULL << WLAN_EID_COUNTRY) |
2516 (1ULL << WLAN_EID_ERP_INFO) |
2517 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2518 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2519 (1ULL << WLAN_EID_HT_CAPABILITY) |
2520 (1ULL << WLAN_EID_HT_OPERATION);
2522 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2523 struct ieee80211_mgmt *mgmt,
2525 struct ieee80211_rx_status *rx_status)
2527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2528 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2530 struct ieee802_11_elems elems;
2531 struct ieee80211_local *local = sdata->local;
2532 struct ieee80211_chanctx_conf *chanctx_conf;
2533 struct ieee80211_channel *chan;
2540 lockdep_assert_held(&ifmgd->mtx);
2542 /* Process beacon from the current BSS */
2543 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2548 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2549 if (!chanctx_conf) {
2554 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2558 chan = chanctx_conf->def.chan;
2561 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2562 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2563 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2564 len - baselen, &elems);
2566 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2567 ifmgd->assoc_data->have_beacon = true;
2568 ifmgd->assoc_data->need_beacon = false;
2569 /* continue assoc process */
2570 ifmgd->assoc_data->timeout = jiffies;
2571 run_again(ifmgd, ifmgd->assoc_data->timeout);
2575 if (!ifmgd->associated ||
2576 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2578 bssid = ifmgd->associated->bssid;
2580 /* Track average RSSI from the Beacon frames of the current AP */
2581 ifmgd->last_beacon_signal = rx_status->signal;
2582 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2583 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2584 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2585 ifmgd->last_cqm_event_signal = 0;
2586 ifmgd->count_beacon_signal = 1;
2587 ifmgd->last_ave_beacon_signal = 0;
2589 ifmgd->ave_beacon_signal =
2590 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2591 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2592 ifmgd->ave_beacon_signal) / 16;
2593 ifmgd->count_beacon_signal++;
2596 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2597 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2598 int sig = ifmgd->ave_beacon_signal;
2599 int last_sig = ifmgd->last_ave_beacon_signal;
2602 * if signal crosses either of the boundaries, invoke callback
2603 * with appropriate parameters
2605 if (sig > ifmgd->rssi_max_thold &&
2606 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2607 ifmgd->last_ave_beacon_signal = sig;
2608 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
2609 } else if (sig < ifmgd->rssi_min_thold &&
2610 (last_sig >= ifmgd->rssi_max_thold ||
2612 ifmgd->last_ave_beacon_signal = sig;
2613 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
2617 if (bss_conf->cqm_rssi_thold &&
2618 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2619 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2620 int sig = ifmgd->ave_beacon_signal / 16;
2621 int last_event = ifmgd->last_cqm_event_signal;
2622 int thold = bss_conf->cqm_rssi_thold;
2623 int hyst = bss_conf->cqm_rssi_hyst;
2625 (last_event == 0 || sig < last_event - hyst)) {
2626 ifmgd->last_cqm_event_signal = sig;
2627 ieee80211_cqm_rssi_notify(
2629 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2631 } else if (sig > thold &&
2632 (last_event == 0 || sig > last_event + hyst)) {
2633 ifmgd->last_cqm_event_signal = sig;
2634 ieee80211_cqm_rssi_notify(
2636 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2641 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2642 mlme_dbg_ratelimited(sdata,
2643 "cancelling probereq poll due to a received beacon\n");
2644 mutex_lock(&local->mtx);
2645 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2646 ieee80211_run_deferred_scan(local);
2647 mutex_unlock(&local->mtx);
2649 mutex_lock(&local->iflist_mtx);
2650 ieee80211_recalc_ps(local, -1);
2651 mutex_unlock(&local->iflist_mtx);
2655 * Push the beacon loss detection into the future since
2656 * we are processing a beacon from the AP just now.
2658 ieee80211_sta_reset_beacon_monitor(sdata);
2660 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2661 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2662 len - baselen, &elems,
2663 care_about_ies, ncrc);
2665 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2666 bool directed_tim = ieee80211_check_tim(elems.tim,
2670 if (local->hw.conf.dynamic_ps_timeout > 0) {
2671 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2672 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2673 ieee80211_hw_config(local,
2674 IEEE80211_CONF_CHANGE_PS);
2676 ieee80211_send_nullfunc(local, sdata, 0);
2677 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2678 local->pspolling = true;
2681 * Here is assumed that the driver will be
2682 * able to send ps-poll frame and receive a
2683 * response even though power save mode is
2684 * enabled, but some drivers might require
2685 * to disable power save here. This needs
2686 * to be investigated.
2688 ieee80211_send_pspoll(local, sdata);
2693 if (sdata->vif.p2p) {
2697 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2699 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2701 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2702 bss_conf->p2p_oppps = noa[1] & 0x80;
2703 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2704 changed |= BSS_CHANGED_P2P_PS;
2705 sdata->u.mgd.p2p_noa_index = noa[0];
2707 * make sure we update all information, the CRC
2708 * mechanism doesn't look at P2P attributes.
2710 ifmgd->beacon_crc_valid = false;
2714 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2716 ifmgd->beacon_crc = ncrc;
2717 ifmgd->beacon_crc_valid = true;
2719 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2721 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2722 elems.wmm_param_len))
2723 changed |= BSS_CHANGED_QOS;
2726 * If we haven't had a beacon before, tell the driver about the
2729 if (!bss_conf->dtim_period) {
2730 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2732 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2734 bss_conf->dtim_period = 1;
2735 changed |= BSS_CHANGED_DTIM_PERIOD;
2738 if (elems.erp_info && elems.erp_info_len >= 1) {
2740 erp_value = elems.erp_info[0];
2744 changed |= ieee80211_handle_bss_capability(sdata,
2745 le16_to_cpu(mgmt->u.beacon.capab_info),
2746 erp_valid, erp_value);
2749 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
2750 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2751 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2754 if (elems.country_elem && elems.pwr_constr_elem &&
2755 mgmt->u.probe_resp.capab_info &
2756 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
2757 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2759 elems.country_elem_len,
2760 elems.pwr_constr_elem);
2762 ieee80211_bss_info_change_notify(sdata, changed);
2765 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2766 struct sk_buff *skb)
2768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2769 struct ieee80211_rx_status *rx_status;
2770 struct ieee80211_mgmt *mgmt;
2771 struct cfg80211_bss *bss = NULL;
2772 enum rx_mgmt_action rma = RX_MGMT_NONE;
2775 rx_status = (struct ieee80211_rx_status *) skb->cb;
2776 mgmt = (struct ieee80211_mgmt *) skb->data;
2777 fc = le16_to_cpu(mgmt->frame_control);
2779 mutex_lock(&ifmgd->mtx);
2781 switch (fc & IEEE80211_FCTL_STYPE) {
2782 case IEEE80211_STYPE_BEACON:
2783 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2785 case IEEE80211_STYPE_PROBE_RESP:
2786 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2788 case IEEE80211_STYPE_AUTH:
2789 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2791 case IEEE80211_STYPE_DEAUTH:
2792 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2794 case IEEE80211_STYPE_DISASSOC:
2795 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2797 case IEEE80211_STYPE_ASSOC_RESP:
2798 case IEEE80211_STYPE_REASSOC_RESP:
2799 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2801 case IEEE80211_STYPE_ACTION:
2802 switch (mgmt->u.action.category) {
2803 case WLAN_CATEGORY_SPECTRUM_MGMT:
2804 ieee80211_sta_process_chanswitch(sdata,
2805 &mgmt->u.action.u.chan_switch.sw_elem,
2806 (void *)ifmgd->associated->priv,
2807 rx_status->mactime);
2811 mutex_unlock(&ifmgd->mtx);
2817 case RX_MGMT_CFG80211_DEAUTH:
2818 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2820 case RX_MGMT_CFG80211_DISASSOC:
2821 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2823 case RX_MGMT_CFG80211_RX_AUTH:
2824 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2826 case RX_MGMT_CFG80211_RX_ASSOC:
2827 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2829 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2830 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2833 WARN(1, "unexpected: %d", rma);
2837 static void ieee80211_sta_timer(unsigned long data)
2839 struct ieee80211_sub_if_data *sdata =
2840 (struct ieee80211_sub_if_data *) data;
2841 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2842 struct ieee80211_local *local = sdata->local;
2844 if (local->quiescing) {
2845 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2849 ieee80211_queue_work(&local->hw, &sdata->work);
2852 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2853 u8 *bssid, u8 reason)
2855 struct ieee80211_local *local = sdata->local;
2856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2857 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2859 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2861 mutex_unlock(&ifmgd->mtx);
2864 * must be outside lock due to cfg80211,
2865 * but that's not a problem.
2867 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
2869 mutex_lock(&local->mtx);
2870 ieee80211_recalc_idle(local);
2871 mutex_unlock(&local->mtx);
2873 mutex_lock(&ifmgd->mtx);
2876 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2878 struct ieee80211_local *local = sdata->local;
2879 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2880 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2883 lockdep_assert_held(&ifmgd->mtx);
2885 if (WARN_ON_ONCE(!auth_data))
2888 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2889 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2890 IEEE80211_TX_INTFL_MLME_CONN_TX;
2894 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2895 sdata_info(sdata, "authentication with %pM timed out\n",
2896 auth_data->bss->bssid);
2899 * Most likely AP is not in the range so remove the
2900 * bss struct for that AP.
2902 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2907 drv_mgd_prepare_tx(local, sdata);
2909 if (auth_data->bss->proberesp_ies) {
2913 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2914 auth_data->bss->bssid, auth_data->tries,
2915 IEEE80211_AUTH_MAX_TRIES);
2917 auth_data->expected_transaction = 2;
2919 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2920 trans = auth_data->sae_trans;
2921 status = auth_data->sae_status;
2922 auth_data->expected_transaction = trans;
2925 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2926 auth_data->data, auth_data->data_len,
2927 auth_data->bss->bssid,
2928 auth_data->bss->bssid, NULL, 0, 0,
2933 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2934 auth_data->bss->bssid, auth_data->tries,
2935 IEEE80211_AUTH_MAX_TRIES);
2938 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2944 * Direct probe is sent to broadcast address as some APs
2945 * will not answer to direct packet in unassociated state.
2947 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2948 NULL, 0, (u32) -1, true, tx_flags,
2949 auth_data->bss->channel, false);
2953 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
2954 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2955 run_again(ifmgd, auth_data->timeout);
2961 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2963 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2964 struct ieee80211_local *local = sdata->local;
2966 lockdep_assert_held(&sdata->u.mgd.mtx);
2968 assoc_data->tries++;
2969 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2970 sdata_info(sdata, "association with %pM timed out\n",
2971 assoc_data->bss->bssid);
2974 * Most likely AP is not in the range so remove the
2975 * bss struct for that AP.
2977 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2982 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2983 assoc_data->bss->bssid, assoc_data->tries,
2984 IEEE80211_ASSOC_MAX_TRIES);
2985 ieee80211_send_assoc(sdata);
2987 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
2988 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2989 run_again(&sdata->u.mgd, assoc_data->timeout);
2995 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
2996 __le16 fc, bool acked)
2998 struct ieee80211_local *local = sdata->local;
3000 sdata->u.mgd.status_fc = fc;
3001 sdata->u.mgd.status_acked = acked;
3002 sdata->u.mgd.status_received = true;
3004 ieee80211_queue_work(&local->hw, &sdata->work);
3007 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3009 struct ieee80211_local *local = sdata->local;
3010 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3012 mutex_lock(&ifmgd->mtx);
3014 if (ifmgd->status_received) {
3015 __le16 fc = ifmgd->status_fc;
3016 bool status_acked = ifmgd->status_acked;
3018 ifmgd->status_received = false;
3019 if (ifmgd->auth_data &&
3020 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3022 ifmgd->auth_data->timeout =
3023 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3024 run_again(ifmgd, ifmgd->auth_data->timeout);
3026 ifmgd->auth_data->timeout = jiffies - 1;
3028 } else if (ifmgd->assoc_data &&
3029 (ieee80211_is_assoc_req(fc) ||
3030 ieee80211_is_reassoc_req(fc))) {
3032 ifmgd->assoc_data->timeout =
3033 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3034 run_again(ifmgd, ifmgd->assoc_data->timeout);
3036 ifmgd->assoc_data->timeout = jiffies - 1;
3041 if (ifmgd->auth_data &&
3042 time_after(jiffies, ifmgd->auth_data->timeout)) {
3043 if (ifmgd->auth_data->done) {
3045 * ok ... we waited for assoc but userspace didn't,
3046 * so let's just kill the auth data
3048 ieee80211_destroy_auth_data(sdata, false);
3049 } else if (ieee80211_probe_auth(sdata)) {
3052 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3054 ieee80211_destroy_auth_data(sdata, false);
3056 mutex_unlock(&ifmgd->mtx);
3057 cfg80211_send_auth_timeout(sdata->dev, bssid);
3058 mutex_lock(&ifmgd->mtx);
3060 } else if (ifmgd->auth_data)
3061 run_again(ifmgd, ifmgd->auth_data->timeout);
3063 if (ifmgd->assoc_data &&
3064 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3065 if ((ifmgd->assoc_data->need_beacon &&
3066 !ifmgd->assoc_data->have_beacon) ||
3067 ieee80211_do_assoc(sdata)) {
3070 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3072 ieee80211_destroy_assoc_data(sdata, false);
3074 mutex_unlock(&ifmgd->mtx);
3075 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3076 mutex_lock(&ifmgd->mtx);
3078 } else if (ifmgd->assoc_data)
3079 run_again(ifmgd, ifmgd->assoc_data->timeout);
3081 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3082 IEEE80211_STA_CONNECTION_POLL) &&
3083 ifmgd->associated) {
3087 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3089 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3090 max_tries = max_nullfunc_tries;
3092 max_tries = max_probe_tries;
3094 /* ACK received for nullfunc probing frame */
3095 if (!ifmgd->probe_send_count)
3096 ieee80211_reset_ap_probe(sdata);
3097 else if (ifmgd->nullfunc_failed) {
3098 if (ifmgd->probe_send_count < max_tries) {
3100 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3101 bssid, ifmgd->probe_send_count,
3103 ieee80211_mgd_probe_ap_send(sdata);
3106 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3108 ieee80211_sta_connection_lost(sdata, bssid,
3109 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
3111 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3112 run_again(ifmgd, ifmgd->probe_timeout);
3113 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3115 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3116 bssid, probe_wait_ms);
3117 ieee80211_sta_connection_lost(sdata, bssid,
3118 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
3119 } else if (ifmgd->probe_send_count < max_tries) {
3121 "No probe response from AP %pM after %dms, try %d/%i\n",
3122 bssid, probe_wait_ms,
3123 ifmgd->probe_send_count, max_tries);
3124 ieee80211_mgd_probe_ap_send(sdata);
3127 * We actually lost the connection ... or did we?
3130 wiphy_debug(local->hw.wiphy,
3131 "%s: No probe response from AP %pM"
3132 " after %dms, disconnecting.\n",
3134 bssid, probe_wait_ms);
3136 ieee80211_sta_connection_lost(sdata, bssid,
3137 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
3141 mutex_unlock(&ifmgd->mtx);
3143 mutex_lock(&local->mtx);
3144 ieee80211_recalc_idle(local);
3145 mutex_unlock(&local->mtx);
3148 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3150 struct ieee80211_sub_if_data *sdata =
3151 (struct ieee80211_sub_if_data *) data;
3152 struct ieee80211_local *local = sdata->local;
3154 if (local->quiescing)
3157 ieee80211_queue_work(&sdata->local->hw,
3158 &sdata->u.mgd.beacon_connection_loss_work);
3161 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3163 struct ieee80211_sub_if_data *sdata =
3164 (struct ieee80211_sub_if_data *) data;
3165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3166 struct ieee80211_local *local = sdata->local;
3168 if (local->quiescing)
3171 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3174 static void ieee80211_sta_monitor_work(struct work_struct *work)
3176 struct ieee80211_sub_if_data *sdata =
3177 container_of(work, struct ieee80211_sub_if_data,
3178 u.mgd.monitor_work);
3180 ieee80211_mgd_probe_ap(sdata, false);
3183 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3187 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3188 __ieee80211_stop_poll(sdata);
3190 /* let's probe the connection once */
3191 flags = sdata->local->hw.flags;
3192 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3193 ieee80211_queue_work(&sdata->local->hw,
3194 &sdata->u.mgd.monitor_work);
3195 /* and do all the other regular work too */
3196 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3201 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3203 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3206 * we need to use atomic bitops for the running bits
3207 * only because both timers might fire at the same
3208 * time -- the code here is properly synchronised.
3211 cancel_work_sync(&ifmgd->request_smps_work);
3213 cancel_work_sync(&ifmgd->monitor_work);
3214 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
3215 cancel_work_sync(&ifmgd->csa_connection_drop_work);
3216 if (del_timer_sync(&ifmgd->timer))
3217 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3219 cancel_work_sync(&ifmgd->chswitch_work);
3220 if (del_timer_sync(&ifmgd->chswitch_timer))
3221 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
3223 /* these will just be re-established on connection */
3224 del_timer_sync(&ifmgd->conn_mon_timer);
3225 del_timer_sync(&ifmgd->bcn_mon_timer);
3228 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3230 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3232 mutex_lock(&ifmgd->mtx);
3233 if (!ifmgd->associated) {
3234 mutex_unlock(&ifmgd->mtx);
3238 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3239 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3240 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3241 ieee80211_sta_connection_lost(sdata,
3242 ifmgd->associated->bssid,
3243 WLAN_REASON_UNSPECIFIED);
3244 mutex_unlock(&ifmgd->mtx);
3247 mutex_unlock(&ifmgd->mtx);
3249 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3250 add_timer(&ifmgd->timer);
3251 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3252 add_timer(&ifmgd->chswitch_timer);
3253 ieee80211_sta_reset_beacon_monitor(sdata);
3255 mutex_lock(&sdata->local->mtx);
3256 ieee80211_restart_sta_timer(sdata);
3257 mutex_unlock(&sdata->local->mtx);
3261 /* interface setup */
3262 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3264 struct ieee80211_if_managed *ifmgd;
3266 ifmgd = &sdata->u.mgd;
3267 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3268 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3269 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3270 ieee80211_beacon_connection_loss_work);
3271 INIT_WORK(&ifmgd->csa_connection_drop_work,
3272 ieee80211_csa_connection_drop_work);
3273 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3274 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3275 (unsigned long) sdata);
3276 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3277 (unsigned long) sdata);
3278 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3279 (unsigned long) sdata);
3280 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3281 (unsigned long) sdata);
3284 ifmgd->powersave = sdata->wdev.ps;
3285 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3286 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
3288 mutex_init(&ifmgd->mtx);
3290 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3291 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3293 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3296 /* scan finished notification */
3297 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3299 struct ieee80211_sub_if_data *sdata;
3301 /* Restart STA timers */
3303 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3304 ieee80211_restart_sta_timer(sdata);
3308 int ieee80211_max_network_latency(struct notifier_block *nb,
3309 unsigned long data, void *dummy)
3311 s32 latency_usec = (s32) data;
3312 struct ieee80211_local *local =
3313 container_of(nb, struct ieee80211_local,
3314 network_latency_notifier);
3316 mutex_lock(&local->iflist_mtx);
3317 ieee80211_recalc_ps(local, latency_usec);
3318 mutex_unlock(&local->iflist_mtx);
3323 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
3329 case NL80211_CHAN_WIDTH_20:
3330 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3331 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3333 case NL80211_CHAN_WIDTH_40:
3334 c->width = NL80211_CHAN_WIDTH_20;
3335 c->center_freq1 = c->chan->center_freq;
3336 ret = IEEE80211_STA_DISABLE_40MHZ |
3337 IEEE80211_STA_DISABLE_VHT;
3339 case NL80211_CHAN_WIDTH_80:
3340 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3344 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3345 c->width = NL80211_CHAN_WIDTH_40;
3346 ret = IEEE80211_STA_DISABLE_VHT;
3348 case NL80211_CHAN_WIDTH_80P80:
3349 c->center_freq2 = 0;
3350 c->width = NL80211_CHAN_WIDTH_80;
3351 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3352 IEEE80211_STA_DISABLE_160MHZ;
3354 case NL80211_CHAN_WIDTH_160:
3356 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3359 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3360 c->width = NL80211_CHAN_WIDTH_80;
3361 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3362 IEEE80211_STA_DISABLE_160MHZ;
3365 case NL80211_CHAN_WIDTH_20_NOHT:
3367 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3368 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3372 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3378 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
3379 struct ieee80211_supported_band *sband,
3380 struct ieee80211_channel *channel,
3381 const struct ieee80211_ht_operation *ht_oper,
3382 const struct ieee80211_vht_operation *vht_oper,
3383 struct cfg80211_chan_def *chandef)
3385 struct cfg80211_chan_def vht_chandef;
3388 chandef->chan = channel;
3389 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
3390 chandef->center_freq1 = channel->center_freq;
3391 chandef->center_freq2 = 0;
3393 if (!ht_oper || !sband->ht_cap.ht_supported) {
3394 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3398 chandef->width = NL80211_CHAN_WIDTH_20;
3400 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3402 /* check that channel matches the right operating channel */
3403 if (channel->center_freq != ht_cfreq) {
3405 * It's possible that some APs are confused here;
3406 * Netgear WNDR3700 sometimes reports 4 higher than
3407 * the actual channel in association responses, but
3408 * since we look at probe response/beacon data here
3412 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3413 channel->center_freq, ht_cfreq,
3414 ht_oper->primary_chan, channel->band);
3415 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3419 /* check 40 MHz support, if we have it */
3420 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3421 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3422 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3423 chandef->width = NL80211_CHAN_WIDTH_40;
3424 chandef->center_freq1 += 10;
3426 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3427 chandef->width = NL80211_CHAN_WIDTH_40;
3428 chandef->center_freq1 -= 10;
3432 /* 40 MHz (and 80 MHz) must be supported for VHT */
3433 ret = IEEE80211_STA_DISABLE_VHT;
3437 if (!vht_oper || !sband->vht_cap.vht_supported) {
3438 ret = IEEE80211_STA_DISABLE_VHT;
3442 vht_chandef.chan = channel;
3443 vht_chandef.center_freq1 =
3444 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
3446 vht_chandef.center_freq2 = 0;
3448 if (vht_oper->center_freq_seg2_idx)
3449 vht_chandef.center_freq2 =
3450 ieee80211_channel_to_frequency(
3451 vht_oper->center_freq_seg2_idx,
3454 switch (vht_oper->chan_width) {
3455 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3456 vht_chandef.width = chandef->width;
3458 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3459 vht_chandef.width = NL80211_CHAN_WIDTH_80;
3461 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3462 vht_chandef.width = NL80211_CHAN_WIDTH_160;
3464 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3465 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
3469 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3470 vht_oper->chan_width);
3471 ret = IEEE80211_STA_DISABLE_VHT;
3475 if (!cfg80211_chandef_valid(&vht_chandef)) {
3477 "AP VHT information is invalid, disable VHT\n");
3478 ret = IEEE80211_STA_DISABLE_VHT;
3482 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
3487 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
3489 "AP VHT information doesn't match HT, disable VHT\n");
3490 ret = IEEE80211_STA_DISABLE_VHT;
3494 *chandef = vht_chandef;
3498 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
3499 IEEE80211_CHAN_DISABLED)) {
3500 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
3501 ret = IEEE80211_STA_DISABLE_HT |
3502 IEEE80211_STA_DISABLE_VHT;
3506 ret = chandef_downgrade(chandef);
3509 if (chandef->width != vht_chandef.width)
3511 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3514 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
3518 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3519 struct cfg80211_bss *cbss)
3521 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3522 const u8 *ht_cap_ie, *vht_cap_ie;
3523 const struct ieee80211_ht_cap *ht_cap;
3524 const struct ieee80211_vht_cap *vht_cap;
3527 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3530 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3531 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3532 ht_cap = (void *)(ht_cap_ie + 2);
3533 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3535 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3536 * "Tx Unequal Modulation Supported" fields.
3540 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3543 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3544 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3548 vht_cap = (void *)(vht_cap_ie + 2);
3549 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3550 for (nss = 8; nss > 0; nss--) {
3551 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3552 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3555 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3556 chains = max(chains, nss);
3562 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3563 struct cfg80211_bss *cbss)
3565 struct ieee80211_local *local = sdata->local;
3566 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3567 const struct ieee80211_ht_operation *ht_oper = NULL;
3568 const struct ieee80211_vht_operation *vht_oper = NULL;
3569 struct ieee80211_supported_band *sband;
3570 struct cfg80211_chan_def chandef;
3573 sband = local->hw.wiphy->bands[cbss->channel->band];
3575 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3576 IEEE80211_STA_DISABLE_80P80MHZ |
3577 IEEE80211_STA_DISABLE_160MHZ);
3581 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3582 sband->ht_cap.ht_supported) {
3583 const u8 *ht_oper_ie;
3585 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3586 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3587 ht_oper = (void *)(ht_oper_ie + 2);
3590 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3591 sband->vht_cap.vht_supported) {
3592 const u8 *vht_oper_ie;
3594 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3595 WLAN_EID_VHT_OPERATION);
3596 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3597 vht_oper = (void *)(vht_oper_ie + 2);
3598 if (vht_oper && !ht_oper) {
3601 "AP advertised VHT without HT, disabling both\n");
3602 sdata->flags |= IEEE80211_STA_DISABLE_HT;
3603 sdata->flags |= IEEE80211_STA_DISABLE_VHT;
3607 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3612 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3617 /* will change later if needed */
3618 sdata->smps_mode = IEEE80211_SMPS_OFF;
3621 * If this fails (possibly due to channel context sharing
3622 * on incompatible channels, e.g. 80+80 and 160 sharing the
3623 * same control channel) try to use a smaller bandwidth.
3625 ret = ieee80211_vif_use_channel(sdata, &chandef,
3626 IEEE80211_CHANCTX_SHARED);
3627 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
3628 ifmgd->flags |= chandef_downgrade(&chandef);
3632 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3633 struct cfg80211_bss *cbss, bool assoc)
3635 struct ieee80211_local *local = sdata->local;
3636 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3637 struct ieee80211_bss *bss = (void *)cbss->priv;
3638 struct sta_info *new_sta = NULL;
3639 bool have_sta = false;
3642 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3647 have_sta = sta_info_get(sdata, cbss->bssid);
3652 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3657 mutex_lock(&local->mtx);
3658 ieee80211_recalc_idle(sdata->local);
3659 mutex_unlock(&local->mtx);
3662 u32 rates = 0, basic_rates = 0;
3663 bool have_higher_than_11mbit;
3664 int min_rate = INT_MAX, min_rate_index = -1;
3665 struct ieee80211_supported_band *sband;
3667 sband = local->hw.wiphy->bands[cbss->channel->band];
3669 err = ieee80211_prep_channel(sdata, cbss);
3671 sta_info_free(local, new_sta);
3675 ieee80211_get_rates(sband, bss->supp_rates,
3676 bss->supp_rates_len,
3677 &rates, &basic_rates,
3678 &have_higher_than_11mbit,
3679 &min_rate, &min_rate_index);
3682 * This used to be a workaround for basic rates missing
3683 * in the association response frame. Now that we no
3684 * longer use the basic rates from there, it probably
3685 * doesn't happen any more, but keep the workaround so
3686 * in case some *other* APs are buggy in different ways
3687 * we can connect -- with a warning.
3689 if (!basic_rates && min_rate_index >= 0) {
3691 "No basic rates, using min rate instead\n");
3692 basic_rates = BIT(min_rate_index);
3695 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3696 sdata->vif.bss_conf.basic_rates = basic_rates;
3698 /* cf. IEEE 802.11 9.2.12 */
3699 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3700 have_higher_than_11mbit)
3701 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3703 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3705 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3707 /* set timing information */
3708 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3709 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3710 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3712 /* tell driver about BSSID, basic rates and timing */
3713 ieee80211_bss_info_change_notify(sdata,
3714 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3715 BSS_CHANGED_BEACON_INT);
3718 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3720 err = sta_info_insert(new_sta);
3724 "failed to insert STA entry for the AP (error %d)\n",
3729 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3735 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3736 struct cfg80211_auth_request *req)
3738 struct ieee80211_local *local = sdata->local;
3739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3740 struct ieee80211_mgd_auth_data *auth_data;
3744 /* prepare auth data structure */
3746 switch (req->auth_type) {
3747 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3748 auth_alg = WLAN_AUTH_OPEN;
3750 case NL80211_AUTHTYPE_SHARED_KEY:
3751 if (IS_ERR(local->wep_tx_tfm))
3753 auth_alg = WLAN_AUTH_SHARED_KEY;
3755 case NL80211_AUTHTYPE_FT:
3756 auth_alg = WLAN_AUTH_FT;
3758 case NL80211_AUTHTYPE_NETWORK_EAP:
3759 auth_alg = WLAN_AUTH_LEAP;
3761 case NL80211_AUTHTYPE_SAE:
3762 auth_alg = WLAN_AUTH_SAE;
3768 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3769 req->ie_len, GFP_KERNEL);
3773 auth_data->bss = req->bss;
3775 if (req->sae_data_len >= 4) {
3776 __le16 *pos = (__le16 *) req->sae_data;
3777 auth_data->sae_trans = le16_to_cpu(pos[0]);
3778 auth_data->sae_status = le16_to_cpu(pos[1]);
3779 memcpy(auth_data->data, req->sae_data + 4,
3780 req->sae_data_len - 4);
3781 auth_data->data_len += req->sae_data_len - 4;
3784 if (req->ie && req->ie_len) {
3785 memcpy(&auth_data->data[auth_data->data_len],
3786 req->ie, req->ie_len);
3787 auth_data->data_len += req->ie_len;
3790 if (req->key && req->key_len) {
3791 auth_data->key_len = req->key_len;
3792 auth_data->key_idx = req->key_idx;
3793 memcpy(auth_data->key, req->key, req->key_len);
3796 auth_data->algorithm = auth_alg;
3798 /* try to authenticate/probe */
3800 mutex_lock(&ifmgd->mtx);
3802 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3803 ifmgd->assoc_data) {
3808 if (ifmgd->auth_data)
3809 ieee80211_destroy_auth_data(sdata, false);
3811 /* prep auth_data so we don't go into idle on disassoc */
3812 ifmgd->auth_data = auth_data;
3814 if (ifmgd->associated)
3815 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3817 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
3819 err = ieee80211_prep_connection(sdata, req->bss, false);
3823 err = ieee80211_probe_auth(sdata);
3825 sta_info_destroy_addr(sdata, req->bss->bssid);
3829 /* hold our own reference */
3830 cfg80211_ref_bss(auth_data->bss);
3835 memset(ifmgd->bssid, 0, ETH_ALEN);
3836 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3837 ifmgd->auth_data = NULL;
3841 mutex_unlock(&ifmgd->mtx);
3846 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3847 struct cfg80211_assoc_request *req)
3849 struct ieee80211_local *local = sdata->local;
3850 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3851 struct ieee80211_bss *bss = (void *)req->bss->priv;
3852 struct ieee80211_mgd_assoc_data *assoc_data;
3853 const struct cfg80211_bss_ies *beacon_ies;
3854 struct ieee80211_supported_band *sband;
3855 const u8 *ssidie, *ht_ie, *vht_ie;
3858 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3863 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3869 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3870 assoc_data->ssid_len = ssidie[1];
3873 mutex_lock(&ifmgd->mtx);
3875 if (ifmgd->associated)
3876 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3878 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3883 if (ifmgd->assoc_data) {
3888 if (ifmgd->auth_data) {
3891 /* keep sta info, bssid if matching */
3892 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3893 ieee80211_destroy_auth_data(sdata, match);
3896 /* prepare assoc data */
3898 ifmgd->beacon_crc_valid = false;
3901 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3902 * We still associate in non-HT mode (11a/b/g) if any one of these
3903 * ciphers is configured as pairwise.
3904 * We can set this to true for non-11n hardware, that'll be checked
3905 * separately along with the peer capabilities.
3907 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
3908 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3909 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3910 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
3911 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3912 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3913 netdev_info(sdata->dev,
3914 "disabling HT/VHT due to WEP/TKIP use\n");
3918 if (req->flags & ASSOC_REQ_DISABLE_HT) {
3919 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3920 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3923 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3924 sband = local->hw.wiphy->bands[req->bss->channel->band];
3925 if (!sband->ht_cap.ht_supported ||
3926 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3927 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3929 netdev_info(sdata->dev,
3930 "disabling HT as WMM/QoS is not supported by the AP\n");
3933 /* disable VHT if we don't support it or the AP doesn't use WMM */
3934 if (!sband->vht_cap.vht_supported ||
3935 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3936 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3938 netdev_info(sdata->dev,
3939 "disabling VHT as WMM/QoS is not supported by the AP\n");
3942 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3943 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3944 sizeof(ifmgd->ht_capa_mask));
3946 if (req->ie && req->ie_len) {
3947 memcpy(assoc_data->ie, req->ie, req->ie_len);
3948 assoc_data->ie_len = req->ie_len;
3951 assoc_data->bss = req->bss;
3953 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3954 if (ifmgd->powersave)
3955 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
3957 sdata->smps_mode = IEEE80211_SMPS_OFF;
3959 sdata->smps_mode = ifmgd->req_smps;
3961 assoc_data->capability = req->bss->capability;
3962 assoc_data->wmm = bss->wmm_used &&
3963 (local->hw.queues >= IEEE80211_NUM_ACS);
3964 assoc_data->supp_rates = bss->supp_rates;
3965 assoc_data->supp_rates_len = bss->supp_rates_len;
3968 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3969 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3970 assoc_data->ap_ht_param =
3971 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3973 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3974 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
3975 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
3976 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
3977 sizeof(struct ieee80211_vht_cap));
3979 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3982 if (bss->wmm_used && bss->uapsd_supported &&
3983 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3984 assoc_data->uapsd = true;
3985 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3987 assoc_data->uapsd = false;
3988 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3991 if (req->prev_bssid)
3992 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3995 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3996 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3998 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3999 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4002 if (req->crypto.control_port)
4003 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4005 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4007 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4008 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4010 /* kick off associate process */
4012 ifmgd->assoc_data = assoc_data;
4013 ifmgd->dtim_period = 0;
4015 err = ieee80211_prep_connection(sdata, req->bss, true);
4020 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4022 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4025 * Wait up to one beacon interval ...
4026 * should this be more if we miss one?
4028 sdata_info(sdata, "waiting for beacon from %pM\n",
4030 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4031 assoc_data->need_beacon = true;
4032 } else if (beacon_ies) {
4033 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4036 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4037 const struct ieee80211_tim_ie *tim;
4038 tim = (void *)(tim_ie + 2);
4039 ifmgd->dtim_period = tim->dtim_period;
4041 assoc_data->have_beacon = true;
4042 assoc_data->timeout = jiffies;
4044 assoc_data->timeout = jiffies;
4048 run_again(ifmgd, assoc_data->timeout);
4050 if (bss->corrupt_data) {
4051 char *corrupt_type = "data";
4052 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4053 if (bss->corrupt_data &
4054 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4055 corrupt_type = "beacon and probe response";
4057 corrupt_type = "beacon";
4058 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4059 corrupt_type = "probe response";
4060 sdata_info(sdata, "associating with AP with corrupt %s\n",
4067 memset(ifmgd->bssid, 0, ETH_ALEN);
4068 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4069 ifmgd->assoc_data = NULL;
4073 mutex_unlock(&ifmgd->mtx);
4078 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4079 struct cfg80211_deauth_request *req)
4081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4082 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4083 bool tx = !req->local_state_change;
4084 bool sent_frame = false;
4086 mutex_lock(&ifmgd->mtx);
4089 "deauthenticating from %pM by local choice (reason=%d)\n",
4090 req->bssid, req->reason_code);
4092 if (ifmgd->auth_data) {
4093 drv_mgd_prepare_tx(sdata->local, sdata);
4094 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4095 IEEE80211_STYPE_DEAUTH,
4096 req->reason_code, tx,
4098 ieee80211_destroy_auth_data(sdata, false);
4099 mutex_unlock(&ifmgd->mtx);
4105 if (ifmgd->associated &&
4106 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4107 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4108 req->reason_code, tx, frame_buf);
4111 mutex_unlock(&ifmgd->mtx);
4114 mutex_lock(&sdata->local->mtx);
4115 ieee80211_recalc_idle(sdata->local);
4116 mutex_unlock(&sdata->local->mtx);
4119 __cfg80211_send_deauth(sdata->dev, frame_buf,
4120 IEEE80211_DEAUTH_FRAME_LEN);
4125 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4126 struct cfg80211_disassoc_request *req)
4128 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4130 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4132 mutex_lock(&ifmgd->mtx);
4135 * cfg80211 should catch this ... but it's racy since
4136 * we can receive a disassoc frame, process it, hand it
4137 * to cfg80211 while that's in a locked section already
4138 * trying to tell us that the user wants to disconnect.
4140 if (ifmgd->associated != req->bss) {
4141 mutex_unlock(&ifmgd->mtx);
4146 "disassociating from %pM by local choice (reason=%d)\n",
4147 req->bss->bssid, req->reason_code);
4149 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4150 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4151 req->reason_code, !req->local_state_change,
4153 mutex_unlock(&ifmgd->mtx);
4155 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4156 IEEE80211_DEAUTH_FRAME_LEN);
4158 mutex_lock(&sdata->local->mtx);
4159 ieee80211_recalc_idle(sdata->local);
4160 mutex_unlock(&sdata->local->mtx);
4165 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4167 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4169 mutex_lock(&ifmgd->mtx);
4170 if (ifmgd->assoc_data)
4171 ieee80211_destroy_assoc_data(sdata, false);
4172 if (ifmgd->auth_data)
4173 ieee80211_destroy_auth_data(sdata, false);
4174 del_timer_sync(&ifmgd->timer);
4175 mutex_unlock(&ifmgd->mtx);
4178 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4179 enum nl80211_cqm_rssi_threshold_event rssi_event,
4182 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4184 trace_api_cqm_rssi_notify(sdata, rssi_event);
4186 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4188 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);