2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_MAX_TRIES 3
35 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37 #define IEEE80211_ASSOC_MAX_TRIES 3
39 static int max_nullfunc_tries = 2;
40 module_param(max_nullfunc_tries, int, 0644);
41 MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
44 static int max_probe_tries = 5;
45 module_param(max_probe_tries, int, 0644);
46 MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
57 #define IEEE80211_BEACON_LOSS_COUNT 7
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
63 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
69 static int probe_wait_ms = 500;
70 module_param(probe_wait_ms, int, 0644);
71 MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
80 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
86 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88 #define TMR_RUNNING_TIMER 0
89 #define TMR_RUNNING_CHANSW 1
91 #define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
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 mod_timer(&sdata->u.mgd.bcn_mon_timer,
150 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
153 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157 if (unlikely(!sdata->u.mgd.associated))
160 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
163 mod_timer(&sdata->u.mgd.conn_mon_timer,
164 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
166 ifmgd->probe_send_count = 0;
169 static int ecw2cw(int ecw)
171 return (1 << ecw) - 1;
174 static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
175 struct ieee80211_ht_operation *ht_oper,
176 const u8 *bssid, bool reconfig)
178 struct ieee80211_local *local = sdata->local;
179 struct ieee80211_supported_band *sband;
180 struct sta_info *sta;
183 bool disable_40 = false;
185 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
187 switch (sdata->vif.bss_conf.channel_type) {
188 case NL80211_CHAN_HT40PLUS:
189 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
192 case NL80211_CHAN_HT40MINUS:
193 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
204 mutex_lock(&local->sta_mtx);
205 sta = sta_info_get(sdata, bssid);
209 if (sta && !sta->supports_40mhz)
212 if (sta && (!reconfig ||
213 (disable_40 != !(sta->sta.ht_cap.cap &
214 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
217 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
219 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
221 rate_control_rate_update(local, sband, sta,
222 IEEE80211_RC_BW_CHANGED);
224 mutex_unlock(&local->sta_mtx);
226 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
228 /* if bss configuration changed store the new one */
229 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
230 changed |= BSS_CHANGED_HT;
231 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
237 /* frame sending functions */
239 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
240 struct ieee80211_supported_band *sband,
246 for (i = 0; i < supp_rates_len; i++) {
247 int rate = (supp_rates[i] & 0x7F) * 5;
249 for (j = 0; j < sband->n_bitrates; j++)
250 if (sband->bitrates[j].bitrate == rate) {
260 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
261 struct sk_buff *skb, u8 ap_ht_param,
262 struct ieee80211_supported_band *sband,
263 struct ieee80211_channel *channel,
264 enum ieee80211_smps_mode smps)
267 u32 flags = channel->flags;
269 struct ieee80211_sta_ht_cap ht_cap;
271 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
273 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
274 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
276 /* determine capability flags */
279 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
282 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
283 cap &= ~IEEE80211_HT_CAP_SGI_40;
286 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
287 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
288 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
289 cap &= ~IEEE80211_HT_CAP_SGI_40;
295 * If 40 MHz was disabled associate as though we weren't
296 * capable of 40 MHz -- some broken APs will never fall
297 * back to trying to transmit in 20 MHz.
299 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
300 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
301 cap &= ~IEEE80211_HT_CAP_SGI_40;
304 /* set SM PS mode properly */
305 cap &= ~IEEE80211_HT_CAP_SM_PS;
307 case IEEE80211_SMPS_AUTOMATIC:
308 case IEEE80211_SMPS_NUM_MODES:
310 case IEEE80211_SMPS_OFF:
311 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
312 IEEE80211_HT_CAP_SM_PS_SHIFT;
314 case IEEE80211_SMPS_STATIC:
315 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
316 IEEE80211_HT_CAP_SM_PS_SHIFT;
318 case IEEE80211_SMPS_DYNAMIC:
319 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
320 IEEE80211_HT_CAP_SM_PS_SHIFT;
324 /* reserve and fill IE */
325 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
326 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
329 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
331 struct ieee80211_local *local = sdata->local;
332 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
333 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
335 struct ieee80211_mgmt *mgmt;
337 size_t offset = 0, noffset;
338 int i, count, rates_len, supp_rates_len;
340 struct ieee80211_supported_band *sband;
343 lockdep_assert_held(&ifmgd->mtx);
345 sband = local->hw.wiphy->bands[local->oper_channel->band];
347 if (assoc_data->supp_rates_len) {
349 * Get all rates supported by the device and the AP as
350 * some APs don't like getting a superset of their rates
351 * in the association request (e.g. D-Link DAP 1353 in
354 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
355 assoc_data->supp_rates_len,
359 * In case AP not provide any supported rates information
360 * before association, we send information element(s) with
361 * all rates that we support.
364 rates_len = sband->n_bitrates;
367 skb = alloc_skb(local->hw.extra_tx_headroom +
368 sizeof(*mgmt) + /* bit too much but doesn't matter */
369 2 + assoc_data->ssid_len + /* SSID */
370 4 + rates_len + /* (extended) rates */
371 4 + /* power capability */
372 2 + 2 * sband->n_channels + /* supported channels */
373 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
374 assoc_data->ie_len + /* extra IEs */
380 skb_reserve(skb, local->hw.extra_tx_headroom);
382 capab = WLAN_CAPABILITY_ESS;
384 if (sband->band == IEEE80211_BAND_2GHZ) {
385 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
386 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
387 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
388 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
391 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
392 capab |= WLAN_CAPABILITY_PRIVACY;
394 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
395 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
396 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
398 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
400 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
401 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
402 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
404 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
406 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
407 IEEE80211_STYPE_REASSOC_REQ);
408 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
409 mgmt->u.reassoc_req.listen_interval =
410 cpu_to_le16(local->hw.conf.listen_interval);
411 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
415 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
416 IEEE80211_STYPE_ASSOC_REQ);
417 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
418 mgmt->u.assoc_req.listen_interval =
419 cpu_to_le16(local->hw.conf.listen_interval);
423 pos = skb_put(skb, 2 + assoc_data->ssid_len);
424 *pos++ = WLAN_EID_SSID;
425 *pos++ = assoc_data->ssid_len;
426 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
428 /* add all rates which were marked to be used above */
429 supp_rates_len = rates_len;
430 if (supp_rates_len > 8)
433 pos = skb_put(skb, supp_rates_len + 2);
434 *pos++ = WLAN_EID_SUPP_RATES;
435 *pos++ = supp_rates_len;
438 for (i = 0; i < sband->n_bitrates; i++) {
439 if (BIT(i) & rates) {
440 int rate = sband->bitrates[i].bitrate;
441 *pos++ = (u8) (rate / 5);
447 if (rates_len > count) {
448 pos = skb_put(skb, rates_len - count + 2);
449 *pos++ = WLAN_EID_EXT_SUPP_RATES;
450 *pos++ = rates_len - count;
452 for (i++; i < sband->n_bitrates; i++) {
453 if (BIT(i) & rates) {
454 int rate = sband->bitrates[i].bitrate;
455 *pos++ = (u8) (rate / 5);
460 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
461 /* 1. power capabilities */
462 pos = skb_put(skb, 4);
463 *pos++ = WLAN_EID_PWR_CAPABILITY;
465 *pos++ = 0; /* min tx power */
466 *pos++ = local->oper_channel->max_power; /* max tx power */
468 /* 2. supported channels */
469 /* TODO: get this in reg domain format */
470 pos = skb_put(skb, 2 * sband->n_channels + 2);
471 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
472 *pos++ = 2 * sband->n_channels;
473 for (i = 0; i < sband->n_channels; i++) {
474 *pos++ = ieee80211_frequency_to_channel(
475 sband->channels[i].center_freq);
476 *pos++ = 1; /* one channel in the subband*/
480 /* if present, add any custom IEs that go before HT */
481 if (assoc_data->ie_len && assoc_data->ie) {
482 static const u8 before_ht[] = {
485 WLAN_EID_EXT_SUPP_RATES,
486 WLAN_EID_PWR_CAPABILITY,
487 WLAN_EID_SUPPORTED_CHANNELS,
490 WLAN_EID_RRM_ENABLED_CAPABILITIES,
491 WLAN_EID_MOBILITY_DOMAIN,
492 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
494 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
495 before_ht, ARRAY_SIZE(before_ht),
497 pos = skb_put(skb, noffset - offset);
498 memcpy(pos, assoc_data->ie + offset, noffset - offset);
502 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
503 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
504 sband, local->oper_channel, ifmgd->ap_smps);
506 /* if present, add any custom non-vendor IEs that go after HT */
507 if (assoc_data->ie_len && assoc_data->ie) {
508 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
511 pos = skb_put(skb, noffset - offset);
512 memcpy(pos, assoc_data->ie + offset, noffset - offset);
516 if (assoc_data->wmm) {
517 if (assoc_data->uapsd) {
518 qos_info = ifmgd->uapsd_queues;
519 qos_info |= (ifmgd->uapsd_max_sp_len <<
520 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
525 pos = skb_put(skb, 9);
526 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
527 *pos++ = 7; /* len */
528 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
531 *pos++ = 2; /* WME */
532 *pos++ = 0; /* WME info */
533 *pos++ = 1; /* WME ver */
537 /* add any remaining custom (i.e. vendor specific here) IEs */
538 if (assoc_data->ie_len && assoc_data->ie) {
539 noffset = assoc_data->ie_len;
540 pos = skb_put(skb, noffset - offset);
541 memcpy(pos, assoc_data->ie + offset, noffset - offset);
544 drv_mgd_prepare_tx(local, sdata);
546 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
547 ieee80211_tx_skb(sdata, skb);
550 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
551 const u8 *bssid, u16 stype,
552 u16 reason, bool send_frame,
555 struct ieee80211_local *local = sdata->local;
556 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
558 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
561 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
562 mgmt->duration = 0; /* initialize only */
563 mgmt->seq_ctrl = 0; /* initialize only */
564 memcpy(mgmt->da, bssid, ETH_ALEN);
565 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
566 memcpy(mgmt->bssid, bssid, ETH_ALEN);
567 /* u.deauth.reason_code == u.disassoc.reason_code */
568 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
571 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
572 DEAUTH_DISASSOC_LEN);
576 skb_reserve(skb, local->hw.extra_tx_headroom);
579 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
580 mgmt, DEAUTH_DISASSOC_LEN);
582 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
583 IEEE80211_SKB_CB(skb)->flags |=
584 IEEE80211_TX_INTFL_DONT_ENCRYPT;
586 drv_mgd_prepare_tx(local, sdata);
588 ieee80211_tx_skb(sdata, skb);
592 void ieee80211_send_pspoll(struct ieee80211_local *local,
593 struct ieee80211_sub_if_data *sdata)
595 struct ieee80211_pspoll *pspoll;
598 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
602 pspoll = (struct ieee80211_pspoll *) skb->data;
603 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
605 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
606 ieee80211_tx_skb(sdata, skb);
609 void ieee80211_send_nullfunc(struct ieee80211_local *local,
610 struct ieee80211_sub_if_data *sdata,
614 struct ieee80211_hdr_3addr *nullfunc;
615 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
617 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
621 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
623 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
625 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
626 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
627 IEEE80211_STA_CONNECTION_POLL))
628 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
630 ieee80211_tx_skb(sdata, skb);
633 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
634 struct ieee80211_sub_if_data *sdata)
637 struct ieee80211_hdr *nullfunc;
640 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
643 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
647 skb_reserve(skb, local->hw.extra_tx_headroom);
649 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
650 memset(nullfunc, 0, 30);
651 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
652 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
653 nullfunc->frame_control = fc;
654 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
655 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
656 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
657 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
659 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
660 ieee80211_tx_skb(sdata, skb);
663 /* spectrum management related things */
664 static void ieee80211_chswitch_work(struct work_struct *work)
666 struct ieee80211_sub_if_data *sdata =
667 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
668 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
670 if (!ieee80211_sdata_running(sdata))
673 mutex_lock(&ifmgd->mtx);
674 if (!ifmgd->associated)
677 sdata->local->oper_channel = sdata->local->csa_channel;
678 if (!sdata->local->ops->channel_switch) {
679 /* call "hw_config" only if doing sw channel switch */
680 ieee80211_hw_config(sdata->local,
681 IEEE80211_CONF_CHANGE_CHANNEL);
683 /* update the device channel directly */
684 sdata->local->hw.conf.channel = sdata->local->oper_channel;
687 /* XXX: shouldn't really modify cfg80211-owned data! */
688 ifmgd->associated->channel = sdata->local->oper_channel;
690 ieee80211_wake_queues_by_reason(&sdata->local->hw,
691 IEEE80211_QUEUE_STOP_REASON_CSA);
693 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
694 mutex_unlock(&ifmgd->mtx);
697 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
699 struct ieee80211_sub_if_data *sdata;
700 struct ieee80211_if_managed *ifmgd;
702 sdata = vif_to_sdata(vif);
703 ifmgd = &sdata->u.mgd;
705 trace_api_chswitch_done(sdata, success);
708 * If the channel switch was not successful, stay
709 * around on the old channel. We currently lack
710 * good handling of this situation, possibly we
711 * should just drop the association.
713 sdata->local->csa_channel = sdata->local->oper_channel;
716 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
718 EXPORT_SYMBOL(ieee80211_chswitch_done);
720 static void ieee80211_chswitch_timer(unsigned long data)
722 struct ieee80211_sub_if_data *sdata =
723 (struct ieee80211_sub_if_data *) data;
724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
726 if (sdata->local->quiescing) {
727 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
731 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
734 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
735 struct ieee80211_channel_sw_ie *sw_elem,
736 struct ieee80211_bss *bss,
739 struct cfg80211_bss *cbss =
740 container_of((void *)bss, struct cfg80211_bss, priv);
741 struct ieee80211_channel *new_ch;
742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
743 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
744 cbss->channel->band);
746 ASSERT_MGD_MTX(ifmgd);
748 if (!ifmgd->associated)
751 if (sdata->local->scanning)
754 /* Disregard subsequent beacons if we are already running a timer
757 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
760 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
761 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
764 sdata->local->csa_channel = new_ch;
766 if (sdata->local->ops->channel_switch) {
767 /* use driver's channel switch callback */
768 struct ieee80211_channel_switch ch_switch;
769 memset(&ch_switch, 0, sizeof(ch_switch));
770 ch_switch.timestamp = timestamp;
772 ch_switch.block_tx = true;
773 ieee80211_stop_queues_by_reason(&sdata->local->hw,
774 IEEE80211_QUEUE_STOP_REASON_CSA);
776 ch_switch.channel = new_ch;
777 ch_switch.count = sw_elem->count;
778 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
779 drv_channel_switch(sdata->local, &ch_switch);
783 /* channel switch handled in software */
784 if (sw_elem->count <= 1) {
785 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
788 ieee80211_stop_queues_by_reason(&sdata->local->hw,
789 IEEE80211_QUEUE_STOP_REASON_CSA);
790 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
791 mod_timer(&ifmgd->chswitch_timer,
793 msecs_to_jiffies(sw_elem->count *
794 cbss->beacon_interval));
798 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
799 u16 capab_info, u8 *pwr_constr_elem,
800 u8 pwr_constr_elem_len)
802 struct ieee80211_conf *conf = &sdata->local->hw.conf;
804 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
807 /* Power constraint IE length should be 1 octet */
808 if (pwr_constr_elem_len != 1)
811 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
812 (*pwr_constr_elem != sdata->local->power_constr_level)) {
813 sdata->local->power_constr_level = *pwr_constr_elem;
814 ieee80211_hw_config(sdata->local, 0);
818 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
820 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
821 struct ieee80211_local *local = sdata->local;
822 struct ieee80211_conf *conf = &local->hw.conf;
824 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
825 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
826 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
828 local->disable_dynamic_ps = false;
829 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
831 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
833 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
835 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
836 struct ieee80211_local *local = sdata->local;
837 struct ieee80211_conf *conf = &local->hw.conf;
839 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
840 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
841 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
843 local->disable_dynamic_ps = true;
844 conf->dynamic_ps_timeout = 0;
845 del_timer_sync(&local->dynamic_ps_timer);
846 ieee80211_queue_work(&local->hw,
847 &local->dynamic_ps_enable_work);
849 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
852 static void ieee80211_enable_ps(struct ieee80211_local *local,
853 struct ieee80211_sub_if_data *sdata)
855 struct ieee80211_conf *conf = &local->hw.conf;
858 * If we are scanning right now then the parameters will
859 * take effect when scan finishes.
864 if (conf->dynamic_ps_timeout > 0 &&
865 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
866 mod_timer(&local->dynamic_ps_timer, jiffies +
867 msecs_to_jiffies(conf->dynamic_ps_timeout));
869 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
870 ieee80211_send_nullfunc(local, sdata, 1);
872 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
873 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
876 conf->flags |= IEEE80211_CONF_PS;
877 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
881 static void ieee80211_change_ps(struct ieee80211_local *local)
883 struct ieee80211_conf *conf = &local->hw.conf;
885 if (local->ps_sdata) {
886 ieee80211_enable_ps(local, local->ps_sdata);
887 } else if (conf->flags & IEEE80211_CONF_PS) {
888 conf->flags &= ~IEEE80211_CONF_PS;
889 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
890 del_timer_sync(&local->dynamic_ps_timer);
891 cancel_work_sync(&local->dynamic_ps_enable_work);
895 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
897 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
898 struct sta_info *sta = NULL;
899 bool authorized = false;
907 if (!mgd->associated)
910 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
911 IEEE80211_STA_CONNECTION_POLL))
915 sta = sta_info_get(sdata, mgd->bssid);
917 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
923 /* need to hold RTNL or interface lock */
924 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
926 struct ieee80211_sub_if_data *sdata, *found = NULL;
930 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
931 local->ps_sdata = NULL;
935 list_for_each_entry(sdata, &local->interfaces, list) {
936 if (!ieee80211_sdata_running(sdata))
938 if (sdata->vif.type == NL80211_IFTYPE_AP) {
939 /* If an AP vif is found, then disable PS
940 * by setting the count to zero thereby setting
946 if (sdata->vif.type != NL80211_IFTYPE_STATION)
952 if (count == 1 && ieee80211_powersave_allowed(found)) {
953 struct ieee80211_conf *conf = &local->hw.conf;
957 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
959 beaconint_us = ieee80211_tu_to_usec(
960 found->vif.bss_conf.beacon_int);
962 timeout = local->dynamic_ps_forced_timeout;
965 * Go to full PSM if the user configures a very low
966 * latency requirement.
967 * The 2000 second value is there for compatibility
968 * until the PM_QOS_NETWORK_LATENCY is configured
971 if (latency > (1900 * USEC_PER_MSEC) &&
972 latency != (2000 * USEC_PER_SEC))
977 local->dynamic_ps_user_timeout = timeout;
978 if (!local->disable_dynamic_ps)
979 conf->dynamic_ps_timeout =
980 local->dynamic_ps_user_timeout;
982 if (beaconint_us > latency) {
983 local->ps_sdata = NULL;
985 struct ieee80211_bss *bss;
989 bss = (void *)found->u.mgd.associated->priv;
990 dtimper = bss->dtim_period;
992 /* If the TIM IE is invalid, pretend the value is 1 */
995 else if (dtimper > 1)
996 maxslp = min_t(int, dtimper,
997 latency / beaconint_us);
999 local->hw.conf.max_sleep_period = maxslp;
1000 local->hw.conf.ps_dtim_period = dtimper;
1001 local->ps_sdata = found;
1004 local->ps_sdata = NULL;
1007 ieee80211_change_ps(local);
1010 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1012 struct ieee80211_local *local =
1013 container_of(work, struct ieee80211_local,
1014 dynamic_ps_disable_work);
1016 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1017 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1018 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1021 ieee80211_wake_queues_by_reason(&local->hw,
1022 IEEE80211_QUEUE_STOP_REASON_PS);
1025 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1027 struct ieee80211_local *local =
1028 container_of(work, struct ieee80211_local,
1029 dynamic_ps_enable_work);
1030 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1031 struct ieee80211_if_managed *ifmgd;
1032 unsigned long flags;
1035 /* can only happen when PS was just disabled anyway */
1039 ifmgd = &sdata->u.mgd;
1041 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1044 if (!local->disable_dynamic_ps &&
1045 local->hw.conf.dynamic_ps_timeout > 0) {
1046 /* don't enter PS if TX frames are pending */
1047 if (drv_tx_frames_pending(local)) {
1048 mod_timer(&local->dynamic_ps_timer, jiffies +
1050 local->hw.conf.dynamic_ps_timeout));
1055 * transmission can be stopped by others which leads to
1056 * dynamic_ps_timer expiry. Postpone the ps timer if it
1057 * is not the actual idle state.
1059 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1060 for (q = 0; q < local->hw.queues; q++) {
1061 if (local->queue_stop_reasons[q]) {
1062 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1064 mod_timer(&local->dynamic_ps_timer, jiffies +
1066 local->hw.conf.dynamic_ps_timeout));
1070 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1073 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1074 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1075 netif_tx_stop_all_queues(sdata->dev);
1077 if (drv_tx_frames_pending(local))
1078 mod_timer(&local->dynamic_ps_timer, jiffies +
1080 local->hw.conf.dynamic_ps_timeout));
1082 ieee80211_send_nullfunc(local, sdata, 1);
1083 /* Flush to get the tx status of nullfunc frame */
1084 drv_flush(local, false);
1088 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1089 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1090 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1091 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1092 local->hw.conf.flags |= IEEE80211_CONF_PS;
1093 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1096 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1097 netif_tx_wake_all_queues(sdata->dev);
1100 void ieee80211_dynamic_ps_timer(unsigned long data)
1102 struct ieee80211_local *local = (void *) data;
1104 if (local->quiescing || local->suspended)
1107 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1111 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1112 struct ieee80211_sub_if_data *sdata,
1113 u8 *wmm_param, size_t wmm_param_len)
1115 struct ieee80211_tx_queue_params params;
1116 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1119 u8 *pos, uapsd_queues = 0;
1121 if (!local->ops->conf_tx)
1124 if (local->hw.queues < IEEE80211_NUM_ACS)
1130 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1133 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1134 uapsd_queues = ifmgd->uapsd_queues;
1136 count = wmm_param[6] & 0x0f;
1137 if (count == ifmgd->wmm_last_param_set)
1139 ifmgd->wmm_last_param_set = count;
1141 pos = wmm_param + 8;
1142 left = wmm_param_len - 8;
1144 memset(¶ms, 0, sizeof(params));
1147 for (; left >= 4; left -= 4, pos += 4) {
1148 int aci = (pos[0] >> 5) & 0x03;
1149 int acm = (pos[0] >> 4) & 0x01;
1157 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1158 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1164 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1165 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1171 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1172 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1179 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1180 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1185 params.aifs = pos[0] & 0x0f;
1186 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1187 params.cw_min = ecw2cw(pos[1] & 0x0f);
1188 params.txop = get_unaligned_le16(pos + 2);
1189 params.uapsd = uapsd;
1192 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1194 params.aifs, params.cw_min, params.cw_max,
1195 params.txop, params.uapsd);
1196 sdata->tx_conf[queue] = params;
1197 if (drv_conf_tx(local, sdata, queue, ¶ms))
1199 "failed to set TX queue parameters for queue %d\n",
1203 /* enable WMM or activate new settings */
1204 sdata->vif.bss_conf.qos = true;
1208 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1210 lockdep_assert_held(&sdata->local->mtx);
1212 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1213 IEEE80211_STA_BEACON_POLL);
1214 ieee80211_run_deferred_scan(sdata->local);
1217 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1219 mutex_lock(&sdata->local->mtx);
1220 __ieee80211_stop_poll(sdata);
1221 mutex_unlock(&sdata->local->mtx);
1224 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1225 u16 capab, bool erp_valid, u8 erp)
1227 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1229 bool use_protection;
1230 bool use_short_preamble;
1231 bool use_short_slot;
1234 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1235 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1237 use_protection = false;
1238 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1241 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1242 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1243 use_short_slot = true;
1245 if (use_protection != bss_conf->use_cts_prot) {
1246 bss_conf->use_cts_prot = use_protection;
1247 changed |= BSS_CHANGED_ERP_CTS_PROT;
1250 if (use_short_preamble != bss_conf->use_short_preamble) {
1251 bss_conf->use_short_preamble = use_short_preamble;
1252 changed |= BSS_CHANGED_ERP_PREAMBLE;
1255 if (use_short_slot != bss_conf->use_short_slot) {
1256 bss_conf->use_short_slot = use_short_slot;
1257 changed |= BSS_CHANGED_ERP_SLOT;
1263 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1264 struct cfg80211_bss *cbss,
1265 u32 bss_info_changed)
1267 struct ieee80211_bss *bss = (void *)cbss->priv;
1268 struct ieee80211_local *local = sdata->local;
1269 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1271 bss_info_changed |= BSS_CHANGED_ASSOC;
1272 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1273 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1275 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1276 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1278 sdata->u.mgd.associated = cbss;
1279 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1281 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1283 /* just to be sure */
1284 ieee80211_stop_poll(sdata);
1286 ieee80211_led_assoc(local, 1);
1288 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1289 bss_conf->dtim_period = bss->dtim_period;
1291 bss_conf->dtim_period = 0;
1293 bss_conf->assoc = 1;
1295 /* Tell the driver to monitor connection quality (if supported) */
1296 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1297 bss_conf->cqm_rssi_thold)
1298 bss_info_changed |= BSS_CHANGED_CQM;
1300 /* Enable ARP filtering */
1301 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1302 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1303 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1306 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1308 mutex_lock(&local->iflist_mtx);
1309 ieee80211_recalc_ps(local, -1);
1310 ieee80211_recalc_smps(local);
1311 mutex_unlock(&local->iflist_mtx);
1313 netif_tx_start_all_queues(sdata->dev);
1314 netif_carrier_on(sdata->dev);
1317 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1318 u16 stype, u16 reason, bool tx,
1321 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1322 struct ieee80211_local *local = sdata->local;
1323 struct sta_info *sta;
1326 ASSERT_MGD_MTX(ifmgd);
1328 if (WARN_ON_ONCE(tx && !frame_buf))
1331 if (WARN_ON(!ifmgd->associated))
1334 ieee80211_stop_poll(sdata);
1336 ifmgd->associated = NULL;
1339 * we need to commit the associated = NULL change because the
1340 * scan code uses that to determine whether this iface should
1341 * go to/wake up from powersave or not -- and could otherwise
1342 * wake the queues erroneously.
1347 * Thus, we can only afterwards stop the queues -- to account
1348 * for the case where another CPU is finishing a scan at this
1349 * time -- we don't want the scan code to enable queues.
1352 netif_tx_stop_all_queues(sdata->dev);
1353 netif_carrier_off(sdata->dev);
1355 mutex_lock(&local->sta_mtx);
1356 sta = sta_info_get(sdata, ifmgd->bssid);
1358 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1359 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1361 mutex_unlock(&local->sta_mtx);
1364 * if we want to get out of ps before disassoc (why?) we have
1365 * to do it before sending disassoc, as otherwise the null-packet
1368 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1369 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1370 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1372 local->ps_sdata = NULL;
1374 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1376 drv_flush(local, false);
1378 /* deauthenticate/disassociate now */
1379 if (tx || frame_buf)
1380 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1381 reason, tx, frame_buf);
1383 /* flush out frame */
1385 drv_flush(local, false);
1387 /* clear bssid only after building the needed mgmt frames */
1388 memset(ifmgd->bssid, 0, ETH_ALEN);
1390 /* remove AP and TDLS peers */
1391 sta_info_flush(local, sdata);
1393 /* finally reset all BSS / config parameters */
1394 changed |= ieee80211_reset_erp_info(sdata);
1396 ieee80211_led_assoc(local, 0);
1397 changed |= BSS_CHANGED_ASSOC;
1398 sdata->vif.bss_conf.assoc = false;
1400 /* on the next assoc, re-program HT parameters */
1401 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1402 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1404 local->power_constr_level = 0;
1406 del_timer_sync(&local->dynamic_ps_timer);
1407 cancel_work_sync(&local->dynamic_ps_enable_work);
1409 /* Disable ARP filtering */
1410 if (sdata->vif.bss_conf.arp_filter_enabled) {
1411 sdata->vif.bss_conf.arp_filter_enabled = false;
1412 changed |= BSS_CHANGED_ARP_FILTER;
1415 sdata->vif.bss_conf.qos = false;
1416 changed |= BSS_CHANGED_QOS;
1418 /* The BSSID (not really interesting) and HT changed */
1419 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1420 ieee80211_bss_info_change_notify(sdata, changed);
1422 /* channel(_type) changes are handled by ieee80211_hw_config */
1423 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1424 ieee80211_hw_config(local, 0);
1426 /* disassociated - set to defaults now */
1427 ieee80211_set_wmm_default(sdata, false);
1429 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1430 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1431 del_timer_sync(&sdata->u.mgd.timer);
1432 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1435 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1436 struct ieee80211_hdr *hdr)
1439 * We can postpone the mgd.timer whenever receiving unicast frames
1440 * from AP because we know that the connection is working both ways
1441 * at that time. But multicast frames (and hence also beacons) must
1442 * be ignored here, because we need to trigger the timer during
1443 * data idle periods for sending the periodic probe request to the
1444 * AP we're connected to.
1446 if (is_multicast_ether_addr(hdr->addr1))
1449 ieee80211_sta_reset_conn_monitor(sdata);
1452 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1454 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1455 struct ieee80211_local *local = sdata->local;
1457 mutex_lock(&local->mtx);
1458 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1459 IEEE80211_STA_CONNECTION_POLL))) {
1460 mutex_unlock(&local->mtx);
1464 __ieee80211_stop_poll(sdata);
1466 mutex_lock(&local->iflist_mtx);
1467 ieee80211_recalc_ps(local, -1);
1468 mutex_unlock(&local->iflist_mtx);
1470 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1474 * We've received a probe response, but are not sure whether
1475 * we have or will be receiving any beacons or data, so let's
1476 * schedule the timers again, just in case.
1478 ieee80211_sta_reset_beacon_monitor(sdata);
1480 mod_timer(&ifmgd->conn_mon_timer,
1481 round_jiffies_up(jiffies +
1482 IEEE80211_CONNECTION_IDLE_TIME));
1484 mutex_unlock(&local->mtx);
1487 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1488 struct ieee80211_hdr *hdr, bool ack)
1490 if (!ieee80211_is_data(hdr->frame_control))
1494 ieee80211_sta_reset_conn_monitor(sdata);
1496 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1497 sdata->u.mgd.probe_send_count > 0) {
1499 sdata->u.mgd.probe_send_count = 0;
1501 sdata->u.mgd.nullfunc_failed = true;
1502 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1506 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1508 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1510 u8 *dst = ifmgd->associated->bssid;
1511 u8 unicast_limit = max(1, max_probe_tries - 3);
1514 * Try sending broadcast probe requests for the last three
1515 * probe requests after the first ones failed since some
1516 * buggy APs only support broadcast probe requests.
1518 if (ifmgd->probe_send_count >= unicast_limit)
1522 * When the hardware reports an accurate Tx ACK status, it's
1523 * better to send a nullfunc frame instead of a probe request,
1524 * as it will kick us off the AP quickly if we aren't associated
1525 * anymore. The timeout will be reset if the frame is ACKed by
1528 ifmgd->probe_send_count++;
1530 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1531 ifmgd->nullfunc_failed = false;
1532 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1536 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1537 if (WARN_ON_ONCE(ssid == NULL))
1542 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1543 0, (u32) -1, true, false);
1546 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1547 run_again(ifmgd, ifmgd->probe_timeout);
1548 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1549 drv_flush(sdata->local, false);
1552 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1555 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1556 bool already = false;
1558 if (!ieee80211_sdata_running(sdata))
1561 mutex_lock(&ifmgd->mtx);
1563 if (!ifmgd->associated)
1566 mutex_lock(&sdata->local->mtx);
1568 if (sdata->local->tmp_channel || sdata->local->scanning) {
1569 mutex_unlock(&sdata->local->mtx);
1574 mlme_dbg_ratelimited(sdata,
1575 "detected beacon loss from AP - sending probe request\n");
1577 ieee80211_cqm_rssi_notify(&sdata->vif,
1578 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
1581 * The driver/our work has already reported this event or the
1582 * connection monitoring has kicked in and we have already sent
1583 * a probe request. Or maybe the AP died and the driver keeps
1584 * reporting until we disassociate...
1586 * In either case we have to ignore the current call to this
1587 * function (except for setting the correct probe reason bit)
1588 * because otherwise we would reset the timer every time and
1589 * never check whether we received a probe response!
1591 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1592 IEEE80211_STA_CONNECTION_POLL))
1596 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1598 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1600 mutex_unlock(&sdata->local->mtx);
1605 mutex_lock(&sdata->local->iflist_mtx);
1606 ieee80211_recalc_ps(sdata->local, -1);
1607 mutex_unlock(&sdata->local->iflist_mtx);
1609 ifmgd->probe_send_count = 0;
1610 ieee80211_mgd_probe_ap_send(sdata);
1612 mutex_unlock(&ifmgd->mtx);
1615 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1616 struct ieee80211_vif *vif)
1618 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1620 struct cfg80211_bss *cbss;
1621 struct sk_buff *skb;
1625 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1628 ASSERT_MGD_MTX(ifmgd);
1630 if (ifmgd->associated)
1631 cbss = ifmgd->associated;
1632 else if (ifmgd->auth_data)
1633 cbss = ifmgd->auth_data->bss;
1634 else if (ifmgd->assoc_data)
1635 cbss = ifmgd->assoc_data->bss;
1639 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
1640 if (WARN_ON_ONCE(ssid == NULL))
1645 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
1646 (u32) -1, ssid + 2, ssid_len,
1651 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1653 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1655 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1656 struct ieee80211_local *local = sdata->local;
1658 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1660 mutex_lock(&ifmgd->mtx);
1661 if (!ifmgd->associated) {
1662 mutex_unlock(&ifmgd->mtx);
1666 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1668 sdata_info(sdata, "Connection to AP %pM lost\n", bssid);
1670 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1671 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1673 mutex_unlock(&ifmgd->mtx);
1676 * must be outside lock due to cfg80211,
1677 * but that's not a problem.
1679 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
1681 mutex_lock(&local->mtx);
1682 ieee80211_recalc_idle(local);
1683 mutex_unlock(&local->mtx);
1686 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1688 struct ieee80211_sub_if_data *sdata =
1689 container_of(work, struct ieee80211_sub_if_data,
1690 u.mgd.beacon_connection_loss_work);
1691 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1692 struct sta_info *sta;
1694 if (ifmgd->associated) {
1696 sta = sta_info_get(sdata, ifmgd->bssid);
1698 sta->beacon_loss_count++;
1702 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1703 __ieee80211_connection_loss(sdata);
1705 ieee80211_mgd_probe_ap(sdata, true);
1708 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1710 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1711 struct ieee80211_hw *hw = &sdata->local->hw;
1713 trace_api_beacon_loss(sdata);
1715 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1716 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1718 EXPORT_SYMBOL(ieee80211_beacon_loss);
1720 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1722 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1723 struct ieee80211_hw *hw = &sdata->local->hw;
1725 trace_api_connection_loss(sdata);
1727 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1728 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1730 EXPORT_SYMBOL(ieee80211_connection_loss);
1733 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1736 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1738 lockdep_assert_held(&sdata->u.mgd.mtx);
1741 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1743 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1744 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1747 cfg80211_put_bss(auth_data->bss);
1749 sdata->u.mgd.auth_data = NULL;
1752 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1753 struct ieee80211_mgmt *mgmt, size_t len)
1755 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1757 struct ieee802_11_elems elems;
1759 pos = mgmt->u.auth.variable;
1760 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1761 if (!elems.challenge)
1763 auth_data->expected_transaction = 4;
1764 drv_mgd_prepare_tx(sdata->local, sdata);
1765 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1766 elems.challenge - 2, elems.challenge_len + 2,
1767 auth_data->bss->bssid, auth_data->bss->bssid,
1768 auth_data->key, auth_data->key_len,
1769 auth_data->key_idx);
1772 static enum rx_mgmt_action __must_check
1773 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1774 struct ieee80211_mgmt *mgmt, size_t len)
1776 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1778 u16 auth_alg, auth_transaction, status_code;
1779 struct sta_info *sta;
1781 lockdep_assert_held(&ifmgd->mtx);
1784 return RX_MGMT_NONE;
1786 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1787 return RX_MGMT_NONE;
1789 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1791 if (!ether_addr_equal(bssid, mgmt->bssid))
1792 return RX_MGMT_NONE;
1794 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1795 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1796 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1798 if (auth_alg != ifmgd->auth_data->algorithm ||
1799 auth_transaction != ifmgd->auth_data->expected_transaction)
1800 return RX_MGMT_NONE;
1802 if (status_code != WLAN_STATUS_SUCCESS) {
1803 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1804 mgmt->sa, status_code);
1805 ieee80211_destroy_auth_data(sdata, false);
1806 return RX_MGMT_CFG80211_RX_AUTH;
1809 switch (ifmgd->auth_data->algorithm) {
1810 case WLAN_AUTH_OPEN:
1811 case WLAN_AUTH_LEAP:
1814 case WLAN_AUTH_SHARED_KEY:
1815 if (ifmgd->auth_data->expected_transaction != 4) {
1816 ieee80211_auth_challenge(sdata, mgmt, len);
1817 /* need another frame */
1818 return RX_MGMT_NONE;
1822 WARN_ONCE(1, "invalid auth alg %d",
1823 ifmgd->auth_data->algorithm);
1824 return RX_MGMT_NONE;
1827 sdata_info(sdata, "authenticated\n");
1828 ifmgd->auth_data->done = true;
1829 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1830 run_again(ifmgd, ifmgd->auth_data->timeout);
1832 /* move station state to auth */
1833 mutex_lock(&sdata->local->sta_mtx);
1834 sta = sta_info_get(sdata, bssid);
1836 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1839 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1840 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
1843 mutex_unlock(&sdata->local->sta_mtx);
1845 return RX_MGMT_CFG80211_RX_AUTH;
1847 mutex_unlock(&sdata->local->sta_mtx);
1848 /* ignore frame -- wait for timeout */
1849 return RX_MGMT_NONE;
1853 static enum rx_mgmt_action __must_check
1854 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1855 struct ieee80211_mgmt *mgmt, size_t len)
1857 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1858 const u8 *bssid = NULL;
1861 lockdep_assert_held(&ifmgd->mtx);
1864 return RX_MGMT_NONE;
1866 if (!ifmgd->associated ||
1867 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1868 return RX_MGMT_NONE;
1870 bssid = ifmgd->associated->bssid;
1872 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1874 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1875 bssid, reason_code);
1877 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1879 mutex_lock(&sdata->local->mtx);
1880 ieee80211_recalc_idle(sdata->local);
1881 mutex_unlock(&sdata->local->mtx);
1883 return RX_MGMT_CFG80211_DEAUTH;
1887 static enum rx_mgmt_action __must_check
1888 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1889 struct ieee80211_mgmt *mgmt, size_t len)
1891 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1894 lockdep_assert_held(&ifmgd->mtx);
1897 return RX_MGMT_NONE;
1899 if (!ifmgd->associated ||
1900 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1901 return RX_MGMT_NONE;
1903 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1905 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
1906 mgmt->sa, reason_code);
1908 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1910 mutex_lock(&sdata->local->mtx);
1911 ieee80211_recalc_idle(sdata->local);
1912 mutex_unlock(&sdata->local->mtx);
1914 return RX_MGMT_CFG80211_DISASSOC;
1917 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1918 u8 *supp_rates, unsigned int supp_rates_len,
1919 u32 *rates, u32 *basic_rates,
1920 bool *have_higher_than_11mbit,
1921 int *min_rate, int *min_rate_index)
1925 for (i = 0; i < supp_rates_len; i++) {
1926 int rate = (supp_rates[i] & 0x7f) * 5;
1927 bool is_basic = !!(supp_rates[i] & 0x80);
1930 *have_higher_than_11mbit = true;
1933 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1934 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1936 * Note: Even through the membership selector and the basic
1937 * rate flag share the same bit, they are not exactly
1940 if (!!(supp_rates[i] & 0x80) &&
1941 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1944 for (j = 0; j < sband->n_bitrates; j++) {
1945 if (sband->bitrates[j].bitrate == rate) {
1948 *basic_rates |= BIT(j);
1949 if (rate < *min_rate) {
1951 *min_rate_index = j;
1959 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1962 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1964 lockdep_assert_held(&sdata->u.mgd.mtx);
1967 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1969 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1970 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1974 sdata->u.mgd.assoc_data = NULL;
1977 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1978 struct cfg80211_bss *cbss,
1979 struct ieee80211_mgmt *mgmt, size_t len)
1981 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1982 struct ieee80211_local *local = sdata->local;
1983 struct ieee80211_supported_band *sband;
1984 struct sta_info *sta;
1986 u16 capab_info, aid;
1987 struct ieee802_11_elems elems;
1988 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1992 /* AssocResp and ReassocResp have identical structure */
1994 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1995 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1997 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1998 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2000 aid &= ~(BIT(15) | BIT(14));
2002 ifmgd->broken_ap = false;
2004 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2005 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2008 ifmgd->broken_ap = true;
2011 pos = mgmt->u.assoc_resp.variable;
2012 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2014 if (!elems.supp_rates) {
2015 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2021 mutex_lock(&sdata->local->sta_mtx);
2023 * station info was already allocated and inserted before
2024 * the association and should be available to us
2026 sta = sta_info_get(sdata, cbss->bssid);
2027 if (WARN_ON(!sta)) {
2028 mutex_unlock(&sdata->local->sta_mtx);
2032 sband = local->hw.wiphy->bands[local->oper_channel->band];
2034 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2035 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2036 elems.ht_cap_elem, &sta->sta.ht_cap);
2038 sta->supports_40mhz =
2039 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2041 rate_control_rate_init(sta);
2043 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2044 set_sta_flag(sta, WLAN_STA_MFP);
2046 if (elems.wmm_param)
2047 set_sta_flag(sta, WLAN_STA_WME);
2049 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2051 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2052 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2053 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2056 "failed to move station %pM to desired state\n",
2058 WARN_ON(__sta_info_destroy(sta));
2059 mutex_unlock(&sdata->local->sta_mtx);
2063 mutex_unlock(&sdata->local->sta_mtx);
2066 * Always handle WMM once after association regardless
2067 * of the first value the AP uses. Setting -1 here has
2068 * that effect because the AP values is an unsigned
2071 ifmgd->wmm_last_param_set = -1;
2073 if (elems.wmm_param)
2074 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2075 elems.wmm_param_len);
2077 ieee80211_set_wmm_default(sdata, false);
2078 changed |= BSS_CHANGED_QOS;
2080 if (elems.ht_operation && elems.wmm_param &&
2081 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2082 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2083 cbss->bssid, false);
2085 /* set AID and assoc capability,
2086 * ieee80211_set_associated() will tell the driver */
2087 bss_conf->aid = aid;
2088 bss_conf->assoc_capability = capab_info;
2089 ieee80211_set_associated(sdata, cbss, changed);
2092 * If we're using 4-addr mode, let the AP know that we're
2093 * doing so, so that it can create the STA VLAN on its side
2095 if (ifmgd->use_4addr)
2096 ieee80211_send_4addr_nullfunc(local, sdata);
2099 * Start timer to probe the connection to the AP now.
2100 * Also start the timer that will detect beacon loss.
2102 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2103 ieee80211_sta_reset_beacon_monitor(sdata);
2108 static enum rx_mgmt_action __must_check
2109 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2110 struct ieee80211_mgmt *mgmt, size_t len,
2111 struct cfg80211_bss **bss)
2113 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2114 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2115 u16 capab_info, status_code, aid;
2116 struct ieee802_11_elems elems;
2120 lockdep_assert_held(&ifmgd->mtx);
2123 return RX_MGMT_NONE;
2124 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2125 return RX_MGMT_NONE;
2128 * AssocResp and ReassocResp have identical structure, so process both
2129 * of them in this function.
2133 return RX_MGMT_NONE;
2135 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2136 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2137 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2138 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2141 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2142 reassoc ? "Rea" : "A", mgmt->sa,
2143 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2145 pos = mgmt->u.assoc_resp.variable;
2146 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2148 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2149 elems.timeout_int && elems.timeout_int_len == 5 &&
2150 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2152 tu = get_unaligned_le32(elems.timeout_int + 1);
2153 ms = tu * 1024 / 1000;
2155 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2157 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2158 if (ms > IEEE80211_ASSOC_TIMEOUT)
2159 run_again(ifmgd, assoc_data->timeout);
2160 return RX_MGMT_NONE;
2163 *bss = assoc_data->bss;
2165 if (status_code != WLAN_STATUS_SUCCESS) {
2166 sdata_info(sdata, "%pM denied association (code=%d)\n",
2167 mgmt->sa, status_code);
2168 ieee80211_destroy_assoc_data(sdata, false);
2170 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2171 /* oops -- internal error -- send timeout for now */
2172 ieee80211_destroy_assoc_data(sdata, false);
2173 cfg80211_put_bss(*bss);
2174 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2176 sdata_info(sdata, "associated\n");
2179 * destroy assoc_data afterwards, as otherwise an idle
2180 * recalc after assoc_data is NULL but before associated
2181 * is set can cause the interface to go idle
2183 ieee80211_destroy_assoc_data(sdata, true);
2186 return RX_MGMT_CFG80211_RX_ASSOC;
2188 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2189 struct ieee80211_mgmt *mgmt,
2191 struct ieee80211_rx_status *rx_status,
2192 struct ieee802_11_elems *elems,
2195 struct ieee80211_local *local = sdata->local;
2197 struct ieee80211_bss *bss;
2198 struct ieee80211_channel *channel;
2199 bool need_ps = false;
2201 if (sdata->u.mgd.associated &&
2202 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
2203 bss = (void *)sdata->u.mgd.associated->priv;
2204 /* not previously set so we may need to recalc */
2205 need_ps = !bss->dtim_period;
2208 if (elems->ds_params && elems->ds_params_len == 1)
2209 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2212 freq = rx_status->freq;
2214 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2216 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2219 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2222 ieee80211_rx_bss_put(local, bss);
2224 if (!sdata->u.mgd.associated)
2228 mutex_lock(&local->iflist_mtx);
2229 ieee80211_recalc_ps(local, -1);
2230 mutex_unlock(&local->iflist_mtx);
2233 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
2234 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
2236 struct ieee80211_channel_sw_ie *sw_elem =
2237 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
2238 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2239 bss, rx_status->mactime);
2244 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2245 struct sk_buff *skb)
2247 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2248 struct ieee80211_if_managed *ifmgd;
2249 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2250 size_t baselen, len = skb->len;
2251 struct ieee802_11_elems elems;
2253 ifmgd = &sdata->u.mgd;
2255 ASSERT_MGD_MTX(ifmgd);
2257 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2258 return; /* ignore ProbeResp to foreign address */
2260 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2264 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2267 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2269 if (ifmgd->associated &&
2270 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2271 ieee80211_reset_ap_probe(sdata);
2273 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2274 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2275 /* got probe response, continue with auth */
2276 sdata_info(sdata, "direct probe responded\n");
2277 ifmgd->auth_data->tries = 0;
2278 ifmgd->auth_data->timeout = jiffies;
2279 run_again(ifmgd, ifmgd->auth_data->timeout);
2284 * This is the canonical list of information elements we care about,
2285 * the filter code also gives us all changes to the Microsoft OUI
2286 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2288 * We implement beacon filtering in software since that means we can
2289 * avoid processing the frame here and in cfg80211, and userspace
2290 * will not be able to tell whether the hardware supports it or not.
2292 * XXX: This list needs to be dynamic -- userspace needs to be able to
2293 * add items it requires. It also needs to be able to tell us to
2294 * look out for other vendor IEs.
2296 static const u64 care_about_ies =
2297 (1ULL << WLAN_EID_COUNTRY) |
2298 (1ULL << WLAN_EID_ERP_INFO) |
2299 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2300 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2301 (1ULL << WLAN_EID_HT_CAPABILITY) |
2302 (1ULL << WLAN_EID_HT_OPERATION);
2304 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2305 struct ieee80211_mgmt *mgmt,
2307 struct ieee80211_rx_status *rx_status)
2309 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2310 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2312 struct ieee802_11_elems elems;
2313 struct ieee80211_local *local = sdata->local;
2315 bool erp_valid, directed_tim = false;
2320 lockdep_assert_held(&ifmgd->mtx);
2322 /* Process beacon from the current BSS */
2323 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2327 if (rx_status->freq != local->hw.conf.channel->center_freq)
2330 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2331 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2332 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2333 len - baselen, &elems);
2335 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2337 ifmgd->assoc_data->have_beacon = true;
2338 ifmgd->assoc_data->sent_assoc = false;
2339 /* continue assoc process */
2340 ifmgd->assoc_data->timeout = jiffies;
2341 run_again(ifmgd, ifmgd->assoc_data->timeout);
2345 if (!ifmgd->associated ||
2346 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2348 bssid = ifmgd->associated->bssid;
2350 /* Track average RSSI from the Beacon frames of the current AP */
2351 ifmgd->last_beacon_signal = rx_status->signal;
2352 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2353 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2354 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2355 ifmgd->last_cqm_event_signal = 0;
2356 ifmgd->count_beacon_signal = 1;
2357 ifmgd->last_ave_beacon_signal = 0;
2359 ifmgd->ave_beacon_signal =
2360 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2361 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2362 ifmgd->ave_beacon_signal) / 16;
2363 ifmgd->count_beacon_signal++;
2366 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2367 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2368 int sig = ifmgd->ave_beacon_signal;
2369 int last_sig = ifmgd->last_ave_beacon_signal;
2372 * if signal crosses either of the boundaries, invoke callback
2373 * with appropriate parameters
2375 if (sig > ifmgd->rssi_max_thold &&
2376 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2377 ifmgd->last_ave_beacon_signal = sig;
2378 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2379 } else if (sig < ifmgd->rssi_min_thold &&
2380 (last_sig >= ifmgd->rssi_max_thold ||
2382 ifmgd->last_ave_beacon_signal = sig;
2383 drv_rssi_callback(local, RSSI_EVENT_LOW);
2387 if (bss_conf->cqm_rssi_thold &&
2388 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2389 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2390 int sig = ifmgd->ave_beacon_signal / 16;
2391 int last_event = ifmgd->last_cqm_event_signal;
2392 int thold = bss_conf->cqm_rssi_thold;
2393 int hyst = bss_conf->cqm_rssi_hyst;
2395 (last_event == 0 || sig < last_event - hyst)) {
2396 ifmgd->last_cqm_event_signal = sig;
2397 ieee80211_cqm_rssi_notify(
2399 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2401 } else if (sig > thold &&
2402 (last_event == 0 || sig > last_event + hyst)) {
2403 ifmgd->last_cqm_event_signal = sig;
2404 ieee80211_cqm_rssi_notify(
2406 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2411 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2412 mlme_dbg_ratelimited(sdata,
2413 "cancelling probereq poll due to a received beacon\n");
2414 mutex_lock(&local->mtx);
2415 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2416 ieee80211_run_deferred_scan(local);
2417 mutex_unlock(&local->mtx);
2419 mutex_lock(&local->iflist_mtx);
2420 ieee80211_recalc_ps(local, -1);
2421 mutex_unlock(&local->iflist_mtx);
2425 * Push the beacon loss detection into the future since
2426 * we are processing a beacon from the AP just now.
2428 ieee80211_sta_reset_beacon_monitor(sdata);
2430 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2431 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2432 len - baselen, &elems,
2433 care_about_ies, ncrc);
2435 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2436 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2439 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2441 if (local->hw.conf.dynamic_ps_timeout > 0) {
2442 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2443 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2444 ieee80211_hw_config(local,
2445 IEEE80211_CONF_CHANGE_PS);
2447 ieee80211_send_nullfunc(local, sdata, 0);
2448 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2449 local->pspolling = true;
2452 * Here is assumed that the driver will be
2453 * able to send ps-poll frame and receive a
2454 * response even though power save mode is
2455 * enabled, but some drivers might require
2456 * to disable power save here. This needs
2457 * to be investigated.
2459 ieee80211_send_pspoll(local, sdata);
2464 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2466 ifmgd->beacon_crc = ncrc;
2467 ifmgd->beacon_crc_valid = true;
2469 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2472 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2473 elems.wmm_param_len))
2474 changed |= BSS_CHANGED_QOS;
2476 if (elems.erp_info && elems.erp_info_len >= 1) {
2478 erp_value = elems.erp_info[0];
2482 changed |= ieee80211_handle_bss_capability(sdata,
2483 le16_to_cpu(mgmt->u.beacon.capab_info),
2484 erp_valid, erp_value);
2487 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
2488 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
2489 struct ieee80211_supported_band *sband;
2491 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2493 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2497 /* Note: country IE parsing is done for us by cfg80211 */
2498 if (elems.country_elem) {
2499 /* TODO: IBSS also needs this */
2500 if (elems.pwr_constr_elem)
2501 ieee80211_handle_pwr_constr(sdata,
2502 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2503 elems.pwr_constr_elem,
2504 elems.pwr_constr_elem_len);
2507 ieee80211_bss_info_change_notify(sdata, changed);
2510 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2511 struct sk_buff *skb)
2513 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2514 struct ieee80211_rx_status *rx_status;
2515 struct ieee80211_mgmt *mgmt;
2516 struct cfg80211_bss *bss = NULL;
2517 enum rx_mgmt_action rma = RX_MGMT_NONE;
2520 rx_status = (struct ieee80211_rx_status *) skb->cb;
2521 mgmt = (struct ieee80211_mgmt *) skb->data;
2522 fc = le16_to_cpu(mgmt->frame_control);
2524 mutex_lock(&ifmgd->mtx);
2526 switch (fc & IEEE80211_FCTL_STYPE) {
2527 case IEEE80211_STYPE_BEACON:
2528 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2530 case IEEE80211_STYPE_PROBE_RESP:
2531 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2533 case IEEE80211_STYPE_AUTH:
2534 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2536 case IEEE80211_STYPE_DEAUTH:
2537 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2539 case IEEE80211_STYPE_DISASSOC:
2540 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2542 case IEEE80211_STYPE_ASSOC_RESP:
2543 case IEEE80211_STYPE_REASSOC_RESP:
2544 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2546 case IEEE80211_STYPE_ACTION:
2547 switch (mgmt->u.action.category) {
2548 case WLAN_CATEGORY_SPECTRUM_MGMT:
2549 ieee80211_sta_process_chanswitch(sdata,
2550 &mgmt->u.action.u.chan_switch.sw_elem,
2551 (void *)ifmgd->associated->priv,
2552 rx_status->mactime);
2556 mutex_unlock(&ifmgd->mtx);
2562 case RX_MGMT_CFG80211_DEAUTH:
2563 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2565 case RX_MGMT_CFG80211_DISASSOC:
2566 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2568 case RX_MGMT_CFG80211_RX_AUTH:
2569 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2571 case RX_MGMT_CFG80211_RX_ASSOC:
2572 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2574 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2575 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2578 WARN(1, "unexpected: %d", rma);
2582 static void ieee80211_sta_timer(unsigned long data)
2584 struct ieee80211_sub_if_data *sdata =
2585 (struct ieee80211_sub_if_data *) data;
2586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2587 struct ieee80211_local *local = sdata->local;
2589 if (local->quiescing) {
2590 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2594 ieee80211_queue_work(&local->hw, &sdata->work);
2597 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2598 u8 *bssid, u8 reason)
2600 struct ieee80211_local *local = sdata->local;
2601 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2602 u8 frame_buf[DEAUTH_DISASSOC_LEN];
2604 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2606 mutex_unlock(&ifmgd->mtx);
2609 * must be outside lock due to cfg80211,
2610 * but that's not a problem.
2612 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
2614 mutex_lock(&local->mtx);
2615 ieee80211_recalc_idle(local);
2616 mutex_unlock(&local->mtx);
2618 mutex_lock(&ifmgd->mtx);
2621 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2623 struct ieee80211_local *local = sdata->local;
2624 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2625 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2627 lockdep_assert_held(&ifmgd->mtx);
2629 if (WARN_ON_ONCE(!auth_data))
2634 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2635 sdata_info(sdata, "authentication with %pM timed out\n",
2636 auth_data->bss->bssid);
2639 * Most likely AP is not in the range so remove the
2640 * bss struct for that AP.
2642 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2647 drv_mgd_prepare_tx(local, sdata);
2649 if (auth_data->bss->proberesp_ies) {
2650 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2651 auth_data->bss->bssid, auth_data->tries,
2652 IEEE80211_AUTH_MAX_TRIES);
2654 auth_data->expected_transaction = 2;
2655 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2656 auth_data->ie, auth_data->ie_len,
2657 auth_data->bss->bssid,
2658 auth_data->bss->bssid, NULL, 0, 0);
2662 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2663 auth_data->bss->bssid, auth_data->tries,
2664 IEEE80211_AUTH_MAX_TRIES);
2666 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2670 * Direct probe is sent to broadcast address as some APs
2671 * will not answer to direct packet in unassociated state.
2673 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2674 NULL, 0, (u32) -1, true, false);
2677 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2678 run_again(ifmgd, auth_data->timeout);
2683 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2685 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2686 struct ieee80211_local *local = sdata->local;
2688 lockdep_assert_held(&sdata->u.mgd.mtx);
2690 assoc_data->tries++;
2691 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2692 sdata_info(sdata, "association with %pM timed out\n",
2693 assoc_data->bss->bssid);
2696 * Most likely AP is not in the range so remove the
2697 * bss struct for that AP.
2699 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2704 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2705 assoc_data->bss->bssid, assoc_data->tries,
2706 IEEE80211_ASSOC_MAX_TRIES);
2707 ieee80211_send_assoc(sdata);
2709 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2710 run_again(&sdata->u.mgd, assoc_data->timeout);
2715 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2717 struct ieee80211_local *local = sdata->local;
2718 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2720 mutex_lock(&ifmgd->mtx);
2722 if (ifmgd->auth_data &&
2723 time_after(jiffies, ifmgd->auth_data->timeout)) {
2724 if (ifmgd->auth_data->done) {
2726 * ok ... we waited for assoc but userspace didn't,
2727 * so let's just kill the auth data
2729 ieee80211_destroy_auth_data(sdata, false);
2730 } else if (ieee80211_probe_auth(sdata)) {
2733 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2735 ieee80211_destroy_auth_data(sdata, false);
2737 mutex_unlock(&ifmgd->mtx);
2738 cfg80211_send_auth_timeout(sdata->dev, bssid);
2739 mutex_lock(&ifmgd->mtx);
2741 } else if (ifmgd->auth_data)
2742 run_again(ifmgd, ifmgd->auth_data->timeout);
2744 if (ifmgd->assoc_data &&
2745 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2746 if (!ifmgd->assoc_data->have_beacon ||
2747 ieee80211_do_assoc(sdata)) {
2750 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2752 ieee80211_destroy_assoc_data(sdata, false);
2754 mutex_unlock(&ifmgd->mtx);
2755 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2756 mutex_lock(&ifmgd->mtx);
2758 } else if (ifmgd->assoc_data)
2759 run_again(ifmgd, ifmgd->assoc_data->timeout);
2761 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2762 IEEE80211_STA_CONNECTION_POLL) &&
2763 ifmgd->associated) {
2767 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2769 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2770 max_tries = max_nullfunc_tries;
2772 max_tries = max_probe_tries;
2774 /* ACK received for nullfunc probing frame */
2775 if (!ifmgd->probe_send_count)
2776 ieee80211_reset_ap_probe(sdata);
2777 else if (ifmgd->nullfunc_failed) {
2778 if (ifmgd->probe_send_count < max_tries) {
2780 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2781 bssid, ifmgd->probe_send_count,
2783 ieee80211_mgd_probe_ap_send(sdata);
2786 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2788 ieee80211_sta_connection_lost(sdata, bssid,
2789 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2791 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2792 run_again(ifmgd, ifmgd->probe_timeout);
2793 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2795 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2796 bssid, probe_wait_ms);
2797 ieee80211_sta_connection_lost(sdata, bssid,
2798 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2799 } else if (ifmgd->probe_send_count < max_tries) {
2801 "No probe response from AP %pM after %dms, try %d/%i\n",
2802 bssid, probe_wait_ms,
2803 ifmgd->probe_send_count, max_tries);
2804 ieee80211_mgd_probe_ap_send(sdata);
2807 * We actually lost the connection ... or did we?
2810 wiphy_debug(local->hw.wiphy,
2811 "%s: No probe response from AP %pM"
2812 " after %dms, disconnecting.\n",
2814 bssid, probe_wait_ms);
2816 ieee80211_sta_connection_lost(sdata, bssid,
2817 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2821 mutex_unlock(&ifmgd->mtx);
2823 mutex_lock(&local->mtx);
2824 ieee80211_recalc_idle(local);
2825 mutex_unlock(&local->mtx);
2828 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2830 struct ieee80211_sub_if_data *sdata =
2831 (struct ieee80211_sub_if_data *) data;
2832 struct ieee80211_local *local = sdata->local;
2834 if (local->quiescing)
2837 ieee80211_queue_work(&sdata->local->hw,
2838 &sdata->u.mgd.beacon_connection_loss_work);
2841 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2843 struct ieee80211_sub_if_data *sdata =
2844 (struct ieee80211_sub_if_data *) data;
2845 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2846 struct ieee80211_local *local = sdata->local;
2848 if (local->quiescing)
2851 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2854 static void ieee80211_sta_monitor_work(struct work_struct *work)
2856 struct ieee80211_sub_if_data *sdata =
2857 container_of(work, struct ieee80211_sub_if_data,
2858 u.mgd.monitor_work);
2860 ieee80211_mgd_probe_ap(sdata, false);
2863 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2867 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2868 __ieee80211_stop_poll(sdata);
2870 /* let's probe the connection once */
2871 flags = sdata->local->hw.flags;
2872 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2873 ieee80211_queue_work(&sdata->local->hw,
2874 &sdata->u.mgd.monitor_work);
2875 /* and do all the other regular work too */
2876 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2881 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2883 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2886 * we need to use atomic bitops for the running bits
2887 * only because both timers might fire at the same
2888 * time -- the code here is properly synchronised.
2891 cancel_work_sync(&ifmgd->request_smps_work);
2893 cancel_work_sync(&ifmgd->monitor_work);
2894 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
2895 if (del_timer_sync(&ifmgd->timer))
2896 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2898 cancel_work_sync(&ifmgd->chswitch_work);
2899 if (del_timer_sync(&ifmgd->chswitch_timer))
2900 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2902 /* these will just be re-established on connection */
2903 del_timer_sync(&ifmgd->conn_mon_timer);
2904 del_timer_sync(&ifmgd->bcn_mon_timer);
2907 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2909 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2911 if (!ifmgd->associated)
2914 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2915 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2916 mutex_lock(&ifmgd->mtx);
2917 if (ifmgd->associated) {
2919 "driver requested disconnect after resume\n");
2920 ieee80211_sta_connection_lost(sdata,
2921 ifmgd->associated->bssid,
2922 WLAN_REASON_UNSPECIFIED);
2923 mutex_unlock(&ifmgd->mtx);
2926 mutex_unlock(&ifmgd->mtx);
2929 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2930 add_timer(&ifmgd->timer);
2931 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2932 add_timer(&ifmgd->chswitch_timer);
2933 ieee80211_sta_reset_beacon_monitor(sdata);
2935 mutex_lock(&sdata->local->mtx);
2936 ieee80211_restart_sta_timer(sdata);
2937 mutex_unlock(&sdata->local->mtx);
2941 /* interface setup */
2942 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2944 struct ieee80211_if_managed *ifmgd;
2946 ifmgd = &sdata->u.mgd;
2947 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2948 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2949 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2950 ieee80211_beacon_connection_loss_work);
2951 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
2952 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2953 (unsigned long) sdata);
2954 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2955 (unsigned long) sdata);
2956 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2957 (unsigned long) sdata);
2958 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2959 (unsigned long) sdata);
2962 ifmgd->powersave = sdata->wdev.ps;
2963 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2964 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
2966 mutex_init(&ifmgd->mtx);
2968 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2969 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2971 ifmgd->req_smps = IEEE80211_SMPS_OFF;
2974 /* scan finished notification */
2975 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2977 struct ieee80211_sub_if_data *sdata;
2979 /* Restart STA timers */
2981 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2982 ieee80211_restart_sta_timer(sdata);
2986 int ieee80211_max_network_latency(struct notifier_block *nb,
2987 unsigned long data, void *dummy)
2989 s32 latency_usec = (s32) data;
2990 struct ieee80211_local *local =
2991 container_of(nb, struct ieee80211_local,
2992 network_latency_notifier);
2994 mutex_lock(&local->iflist_mtx);
2995 ieee80211_recalc_ps(local, latency_usec);
2996 mutex_unlock(&local->iflist_mtx);
3001 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3002 struct cfg80211_bss *cbss, bool assoc)
3004 struct ieee80211_local *local = sdata->local;
3005 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3006 struct ieee80211_bss *bss = (void *)cbss->priv;
3007 struct sta_info *sta = NULL;
3008 bool have_sta = false;
3011 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3012 const u8 *ht_oper_ie;
3013 const struct ieee80211_ht_operation *ht_oper = NULL;
3014 struct ieee80211_supported_band *sband;
3016 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3021 have_sta = sta_info_get(sdata, cbss->bssid);
3026 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3031 mutex_lock(&local->mtx);
3032 ieee80211_recalc_idle(sdata->local);
3033 mutex_unlock(&local->mtx);
3035 /* switch to the right channel */
3036 sband = local->hw.wiphy->bands[cbss->channel->band];
3038 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3040 if (sband->ht_cap.ht_supported) {
3041 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3042 cbss->information_elements,
3043 cbss->len_information_elements);
3044 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3045 ht_oper = (void *)(ht_oper_ie + 2);
3049 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3050 cbss->channel->band);
3051 /* check that channel matches the right operating channel */
3052 if (cbss->channel->center_freq != ht_cfreq) {
3054 * It's possible that some APs are confused here;
3055 * Netgear WNDR3700 sometimes reports 4 higher than
3056 * the actual channel in association responses, but
3057 * since we look at probe response/beacon data here
3061 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3062 cbss->channel->center_freq,
3063 ht_cfreq, ht_oper->primary_chan,
3064 cbss->channel->band);
3070 channel_type = NL80211_CHAN_HT20;
3072 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3073 switch (ht_oper->ht_param &
3074 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3075 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3076 channel_type = NL80211_CHAN_HT40PLUS;
3078 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3079 channel_type = NL80211_CHAN_HT40MINUS;
3085 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3086 /* can only fail due to HT40+/- mismatch */
3087 channel_type = NL80211_CHAN_HT20;
3089 "disabling 40 MHz due to multi-vif mismatch\n");
3090 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3091 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3095 local->oper_channel = cbss->channel;
3096 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3099 u32 rates = 0, basic_rates = 0;
3100 bool have_higher_than_11mbit;
3101 int min_rate = INT_MAX, min_rate_index = -1;
3103 ieee80211_get_rates(sband, bss->supp_rates,
3104 bss->supp_rates_len,
3105 &rates, &basic_rates,
3106 &have_higher_than_11mbit,
3107 &min_rate, &min_rate_index);
3110 * This used to be a workaround for basic rates missing
3111 * in the association response frame. Now that we no
3112 * longer use the basic rates from there, it probably
3113 * doesn't happen any more, but keep the workaround so
3114 * in case some *other* APs are buggy in different ways
3115 * we can connect -- with a warning.
3117 if (!basic_rates && min_rate_index >= 0) {
3119 "No basic rates, using min rate instead\n");
3120 basic_rates = BIT(min_rate_index);
3123 sta->sta.supp_rates[cbss->channel->band] = rates;
3124 sdata->vif.bss_conf.basic_rates = basic_rates;
3126 /* cf. IEEE 802.11 9.2.12 */
3127 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3128 have_higher_than_11mbit)
3129 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3131 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3133 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3135 /* set timing information */
3136 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3137 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3138 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3140 /* tell driver about BSSID, basic rates and timing */
3141 ieee80211_bss_info_change_notify(sdata,
3142 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3143 BSS_CHANGED_BEACON_INT);
3146 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3148 err = sta_info_insert(sta);
3152 "failed to insert STA entry for the AP (error %d)\n",
3157 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3163 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3164 struct cfg80211_auth_request *req)
3166 struct ieee80211_local *local = sdata->local;
3167 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3168 struct ieee80211_mgd_auth_data *auth_data;
3172 /* prepare auth data structure */
3174 switch (req->auth_type) {
3175 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3176 auth_alg = WLAN_AUTH_OPEN;
3178 case NL80211_AUTHTYPE_SHARED_KEY:
3179 if (IS_ERR(local->wep_tx_tfm))
3181 auth_alg = WLAN_AUTH_SHARED_KEY;
3183 case NL80211_AUTHTYPE_FT:
3184 auth_alg = WLAN_AUTH_FT;
3186 case NL80211_AUTHTYPE_NETWORK_EAP:
3187 auth_alg = WLAN_AUTH_LEAP;
3193 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3197 auth_data->bss = req->bss;
3199 if (req->ie && req->ie_len) {
3200 memcpy(auth_data->ie, req->ie, req->ie_len);
3201 auth_data->ie_len = req->ie_len;
3204 if (req->key && req->key_len) {
3205 auth_data->key_len = req->key_len;
3206 auth_data->key_idx = req->key_idx;
3207 memcpy(auth_data->key, req->key, req->key_len);
3210 auth_data->algorithm = auth_alg;
3212 /* try to authenticate/probe */
3214 mutex_lock(&ifmgd->mtx);
3216 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3217 ifmgd->assoc_data) {
3222 if (ifmgd->auth_data)
3223 ieee80211_destroy_auth_data(sdata, false);
3225 /* prep auth_data so we don't go into idle on disassoc */
3226 ifmgd->auth_data = auth_data;
3228 if (ifmgd->associated)
3229 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3231 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
3233 err = ieee80211_prep_connection(sdata, req->bss, false);
3237 err = ieee80211_probe_auth(sdata);
3239 sta_info_destroy_addr(sdata, req->bss->bssid);
3243 /* hold our own reference */
3244 cfg80211_ref_bss(auth_data->bss);
3249 ifmgd->auth_data = NULL;
3253 mutex_unlock(&ifmgd->mtx);
3258 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3259 struct cfg80211_assoc_request *req)
3261 struct ieee80211_local *local = sdata->local;
3262 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3263 struct ieee80211_bss *bss = (void *)req->bss->priv;
3264 struct ieee80211_mgd_assoc_data *assoc_data;
3265 struct ieee80211_supported_band *sband;
3266 const u8 *ssidie, *ht_ie;
3269 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3273 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3277 mutex_lock(&ifmgd->mtx);
3279 if (ifmgd->associated)
3280 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3282 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3287 if (ifmgd->assoc_data) {
3292 if (ifmgd->auth_data) {
3295 /* keep sta info, bssid if matching */
3296 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3297 ieee80211_destroy_auth_data(sdata, match);
3300 /* prepare assoc data */
3302 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
3303 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
3305 ifmgd->beacon_crc_valid = false;
3308 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3309 * We still associate in non-HT mode (11a/b/g) if any one of these
3310 * ciphers is configured as pairwise.
3311 * We can set this to true for non-11n hardware, that'll be checked
3312 * separately along with the peer capabilities.
3314 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
3315 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3316 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3317 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
3318 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3319 netdev_info(sdata->dev,
3320 "disabling HT due to WEP/TKIP use\n");
3324 if (req->flags & ASSOC_REQ_DISABLE_HT)
3325 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3327 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3328 sband = local->hw.wiphy->bands[req->bss->channel->band];
3329 if (!sband->ht_cap.ht_supported ||
3330 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3331 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3332 netdev_info(sdata->dev,
3333 "disabling HT as WMM/QoS is not supported\n");
3336 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3337 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3338 sizeof(ifmgd->ht_capa_mask));
3340 if (req->ie && req->ie_len) {
3341 memcpy(assoc_data->ie, req->ie, req->ie_len);
3342 assoc_data->ie_len = req->ie_len;
3345 assoc_data->bss = req->bss;
3347 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3348 if (ifmgd->powersave)
3349 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3351 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3353 ifmgd->ap_smps = ifmgd->req_smps;
3355 assoc_data->capability = req->bss->capability;
3356 assoc_data->wmm = bss->wmm_used &&
3357 (local->hw.queues >= IEEE80211_NUM_ACS);
3358 assoc_data->supp_rates = bss->supp_rates;
3359 assoc_data->supp_rates_len = bss->supp_rates_len;
3361 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3362 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3363 assoc_data->ap_ht_param =
3364 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3366 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3368 if (bss->wmm_used && bss->uapsd_supported &&
3369 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3370 assoc_data->uapsd = true;
3371 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3373 assoc_data->uapsd = false;
3374 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3377 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3378 assoc_data->ssid_len = ssidie[1];
3380 if (req->prev_bssid)
3381 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3384 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3385 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3387 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3388 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3391 if (req->crypto.control_port)
3392 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3394 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3396 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3397 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3399 /* kick off associate process */
3401 ifmgd->assoc_data = assoc_data;
3403 err = ieee80211_prep_connection(sdata, req->bss, true);
3407 if (!bss->dtim_period &&
3408 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3410 * Wait up to one beacon interval ...
3411 * should this be more if we miss one?
3413 sdata_info(sdata, "waiting for beacon from %pM\n",
3415 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
3417 assoc_data->have_beacon = true;
3418 assoc_data->sent_assoc = false;
3419 assoc_data->timeout = jiffies;
3421 run_again(ifmgd, assoc_data->timeout);
3423 if (bss->corrupt_data) {
3424 char *corrupt_type = "data";
3425 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3426 if (bss->corrupt_data &
3427 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3428 corrupt_type = "beacon and probe response";
3430 corrupt_type = "beacon";
3431 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3432 corrupt_type = "probe response";
3433 sdata_info(sdata, "associating with AP with corrupt %s\n",
3440 ifmgd->assoc_data = NULL;
3444 mutex_unlock(&ifmgd->mtx);
3449 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
3450 struct cfg80211_deauth_request *req)
3452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3453 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3455 mutex_lock(&ifmgd->mtx);
3457 if (ifmgd->auth_data) {
3458 ieee80211_destroy_auth_data(sdata, false);
3459 mutex_unlock(&ifmgd->mtx);
3464 "deauthenticating from %pM by local choice (reason=%d)\n",
3465 req->bssid, req->reason_code);
3467 if (ifmgd->associated &&
3468 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
3469 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3470 req->reason_code, true, frame_buf);
3472 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3473 IEEE80211_STYPE_DEAUTH,
3474 req->reason_code, true,
3476 mutex_unlock(&ifmgd->mtx);
3478 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3480 mutex_lock(&sdata->local->mtx);
3481 ieee80211_recalc_idle(sdata->local);
3482 mutex_unlock(&sdata->local->mtx);
3487 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
3488 struct cfg80211_disassoc_request *req)
3490 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3492 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3494 mutex_lock(&ifmgd->mtx);
3497 * cfg80211 should catch this ... but it's racy since
3498 * we can receive a disassoc frame, process it, hand it
3499 * to cfg80211 while that's in a locked section already
3500 * trying to tell us that the user wants to disconnect.
3502 if (ifmgd->associated != req->bss) {
3503 mutex_unlock(&ifmgd->mtx);
3508 "disassociating from %pM by local choice (reason=%d)\n",
3509 req->bss->bssid, req->reason_code);
3511 memcpy(bssid, req->bss->bssid, ETH_ALEN);
3512 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3513 req->reason_code, !req->local_state_change,
3515 mutex_unlock(&ifmgd->mtx);
3517 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3519 mutex_lock(&sdata->local->mtx);
3520 ieee80211_recalc_idle(sdata->local);
3521 mutex_unlock(&sdata->local->mtx);
3526 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
3528 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3530 mutex_lock(&ifmgd->mtx);
3531 if (ifmgd->assoc_data)
3532 ieee80211_destroy_assoc_data(sdata, false);
3533 if (ifmgd->auth_data)
3534 ieee80211_destroy_auth_data(sdata, false);
3535 del_timer_sync(&ifmgd->timer);
3536 mutex_unlock(&ifmgd->mtx);
3539 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3540 enum nl80211_cqm_rssi_threshold_event rssi_event,
3543 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3545 trace_api_cqm_rssi_notify(sdata, rssi_event);
3547 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3549 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);