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 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
545 ieee80211_tx_skb(sdata, skb);
548 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
549 const u8 *bssid, u16 stype,
550 u16 reason, bool send_frame,
553 struct ieee80211_local *local = sdata->local;
554 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
556 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
559 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
560 mgmt->duration = 0; /* initialize only */
561 mgmt->seq_ctrl = 0; /* initialize only */
562 memcpy(mgmt->da, bssid, ETH_ALEN);
563 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
564 memcpy(mgmt->bssid, bssid, ETH_ALEN);
565 /* u.deauth.reason_code == u.disassoc.reason_code */
566 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
569 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
570 DEAUTH_DISASSOC_LEN);
574 skb_reserve(skb, local->hw.extra_tx_headroom);
577 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
578 mgmt, DEAUTH_DISASSOC_LEN);
580 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
581 IEEE80211_SKB_CB(skb)->flags |=
582 IEEE80211_TX_INTFL_DONT_ENCRYPT;
583 ieee80211_tx_skb(sdata, skb);
587 void ieee80211_send_pspoll(struct ieee80211_local *local,
588 struct ieee80211_sub_if_data *sdata)
590 struct ieee80211_pspoll *pspoll;
593 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
597 pspoll = (struct ieee80211_pspoll *) skb->data;
598 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
600 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
601 ieee80211_tx_skb(sdata, skb);
604 void ieee80211_send_nullfunc(struct ieee80211_local *local,
605 struct ieee80211_sub_if_data *sdata,
609 struct ieee80211_hdr_3addr *nullfunc;
610 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
612 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
616 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
618 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
620 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
621 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
622 IEEE80211_STA_CONNECTION_POLL))
623 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
625 ieee80211_tx_skb(sdata, skb);
628 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
629 struct ieee80211_sub_if_data *sdata)
632 struct ieee80211_hdr *nullfunc;
635 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
638 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
642 skb_reserve(skb, local->hw.extra_tx_headroom);
644 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
645 memset(nullfunc, 0, 30);
646 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
647 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
648 nullfunc->frame_control = fc;
649 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
650 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
651 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
652 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
654 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
655 ieee80211_tx_skb(sdata, skb);
658 /* spectrum management related things */
659 static void ieee80211_chswitch_work(struct work_struct *work)
661 struct ieee80211_sub_if_data *sdata =
662 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
663 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
665 if (!ieee80211_sdata_running(sdata))
668 mutex_lock(&ifmgd->mtx);
669 if (!ifmgd->associated)
672 sdata->local->oper_channel = sdata->local->csa_channel;
673 if (!sdata->local->ops->channel_switch) {
674 /* call "hw_config" only if doing sw channel switch */
675 ieee80211_hw_config(sdata->local,
676 IEEE80211_CONF_CHANGE_CHANNEL);
678 /* update the device channel directly */
679 sdata->local->hw.conf.channel = sdata->local->oper_channel;
682 /* XXX: shouldn't really modify cfg80211-owned data! */
683 ifmgd->associated->channel = sdata->local->oper_channel;
685 ieee80211_wake_queues_by_reason(&sdata->local->hw,
686 IEEE80211_QUEUE_STOP_REASON_CSA);
688 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
689 mutex_unlock(&ifmgd->mtx);
692 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
694 struct ieee80211_sub_if_data *sdata;
695 struct ieee80211_if_managed *ifmgd;
697 sdata = vif_to_sdata(vif);
698 ifmgd = &sdata->u.mgd;
700 trace_api_chswitch_done(sdata, success);
703 * If the channel switch was not successful, stay
704 * around on the old channel. We currently lack
705 * good handling of this situation, possibly we
706 * should just drop the association.
708 sdata->local->csa_channel = sdata->local->oper_channel;
711 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
713 EXPORT_SYMBOL(ieee80211_chswitch_done);
715 static void ieee80211_chswitch_timer(unsigned long data)
717 struct ieee80211_sub_if_data *sdata =
718 (struct ieee80211_sub_if_data *) data;
719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
721 if (sdata->local->quiescing) {
722 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
726 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
729 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
730 struct ieee80211_channel_sw_ie *sw_elem,
731 struct ieee80211_bss *bss,
734 struct cfg80211_bss *cbss =
735 container_of((void *)bss, struct cfg80211_bss, priv);
736 struct ieee80211_channel *new_ch;
737 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
738 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
739 cbss->channel->band);
741 ASSERT_MGD_MTX(ifmgd);
743 if (!ifmgd->associated)
746 if (sdata->local->scanning)
749 /* Disregard subsequent beacons if we are already running a timer
752 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
755 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
756 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
759 sdata->local->csa_channel = new_ch;
761 if (sdata->local->ops->channel_switch) {
762 /* use driver's channel switch callback */
763 struct ieee80211_channel_switch ch_switch;
764 memset(&ch_switch, 0, sizeof(ch_switch));
765 ch_switch.timestamp = timestamp;
767 ch_switch.block_tx = true;
768 ieee80211_stop_queues_by_reason(&sdata->local->hw,
769 IEEE80211_QUEUE_STOP_REASON_CSA);
771 ch_switch.channel = new_ch;
772 ch_switch.count = sw_elem->count;
773 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
774 drv_channel_switch(sdata->local, &ch_switch);
778 /* channel switch handled in software */
779 if (sw_elem->count <= 1) {
780 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
783 ieee80211_stop_queues_by_reason(&sdata->local->hw,
784 IEEE80211_QUEUE_STOP_REASON_CSA);
785 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
786 mod_timer(&ifmgd->chswitch_timer,
788 msecs_to_jiffies(sw_elem->count *
789 cbss->beacon_interval));
793 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
794 u16 capab_info, u8 *pwr_constr_elem,
795 u8 pwr_constr_elem_len)
797 struct ieee80211_conf *conf = &sdata->local->hw.conf;
799 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
802 /* Power constraint IE length should be 1 octet */
803 if (pwr_constr_elem_len != 1)
806 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
807 (*pwr_constr_elem != sdata->local->power_constr_level)) {
808 sdata->local->power_constr_level = *pwr_constr_elem;
809 ieee80211_hw_config(sdata->local, 0);
813 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
815 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
816 struct ieee80211_local *local = sdata->local;
817 struct ieee80211_conf *conf = &local->hw.conf;
819 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
820 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
821 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
823 local->disable_dynamic_ps = false;
824 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
826 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
828 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
830 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
831 struct ieee80211_local *local = sdata->local;
832 struct ieee80211_conf *conf = &local->hw.conf;
834 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
835 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
836 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
838 local->disable_dynamic_ps = true;
839 conf->dynamic_ps_timeout = 0;
840 del_timer_sync(&local->dynamic_ps_timer);
841 ieee80211_queue_work(&local->hw,
842 &local->dynamic_ps_enable_work);
844 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
847 static void ieee80211_enable_ps(struct ieee80211_local *local,
848 struct ieee80211_sub_if_data *sdata)
850 struct ieee80211_conf *conf = &local->hw.conf;
853 * If we are scanning right now then the parameters will
854 * take effect when scan finishes.
859 if (conf->dynamic_ps_timeout > 0 &&
860 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
861 mod_timer(&local->dynamic_ps_timer, jiffies +
862 msecs_to_jiffies(conf->dynamic_ps_timeout));
864 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
865 ieee80211_send_nullfunc(local, sdata, 1);
867 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
868 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
871 conf->flags |= IEEE80211_CONF_PS;
872 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
876 static void ieee80211_change_ps(struct ieee80211_local *local)
878 struct ieee80211_conf *conf = &local->hw.conf;
880 if (local->ps_sdata) {
881 ieee80211_enable_ps(local, local->ps_sdata);
882 } else if (conf->flags & IEEE80211_CONF_PS) {
883 conf->flags &= ~IEEE80211_CONF_PS;
884 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
885 del_timer_sync(&local->dynamic_ps_timer);
886 cancel_work_sync(&local->dynamic_ps_enable_work);
890 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
892 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
893 struct sta_info *sta = NULL;
894 bool authorized = false;
902 if (!mgd->associated)
905 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
906 IEEE80211_STA_CONNECTION_POLL))
910 sta = sta_info_get(sdata, mgd->bssid);
912 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
918 /* need to hold RTNL or interface lock */
919 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
921 struct ieee80211_sub_if_data *sdata, *found = NULL;
925 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
926 local->ps_sdata = NULL;
930 list_for_each_entry(sdata, &local->interfaces, list) {
931 if (!ieee80211_sdata_running(sdata))
933 if (sdata->vif.type == NL80211_IFTYPE_AP) {
934 /* If an AP vif is found, then disable PS
935 * by setting the count to zero thereby setting
941 if (sdata->vif.type != NL80211_IFTYPE_STATION)
947 if (count == 1 && ieee80211_powersave_allowed(found)) {
948 struct ieee80211_conf *conf = &local->hw.conf;
952 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
954 beaconint_us = ieee80211_tu_to_usec(
955 found->vif.bss_conf.beacon_int);
957 timeout = local->dynamic_ps_forced_timeout;
960 * Go to full PSM if the user configures a very low
961 * latency requirement.
962 * The 2000 second value is there for compatibility
963 * until the PM_QOS_NETWORK_LATENCY is configured
966 if (latency > (1900 * USEC_PER_MSEC) &&
967 latency != (2000 * USEC_PER_SEC))
972 local->dynamic_ps_user_timeout = timeout;
973 if (!local->disable_dynamic_ps)
974 conf->dynamic_ps_timeout =
975 local->dynamic_ps_user_timeout;
977 if (beaconint_us > latency) {
978 local->ps_sdata = NULL;
980 struct ieee80211_bss *bss;
984 bss = (void *)found->u.mgd.associated->priv;
985 dtimper = bss->dtim_period;
987 /* If the TIM IE is invalid, pretend the value is 1 */
990 else if (dtimper > 1)
991 maxslp = min_t(int, dtimper,
992 latency / beaconint_us);
994 local->hw.conf.max_sleep_period = maxslp;
995 local->hw.conf.ps_dtim_period = dtimper;
996 local->ps_sdata = found;
999 local->ps_sdata = NULL;
1002 ieee80211_change_ps(local);
1005 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1007 struct ieee80211_local *local =
1008 container_of(work, struct ieee80211_local,
1009 dynamic_ps_disable_work);
1011 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1012 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1013 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1016 ieee80211_wake_queues_by_reason(&local->hw,
1017 IEEE80211_QUEUE_STOP_REASON_PS);
1020 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1022 struct ieee80211_local *local =
1023 container_of(work, struct ieee80211_local,
1024 dynamic_ps_enable_work);
1025 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1026 struct ieee80211_if_managed *ifmgd;
1027 unsigned long flags;
1030 /* can only happen when PS was just disabled anyway */
1034 ifmgd = &sdata->u.mgd;
1036 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1039 if (!local->disable_dynamic_ps &&
1040 local->hw.conf.dynamic_ps_timeout > 0) {
1041 /* don't enter PS if TX frames are pending */
1042 if (drv_tx_frames_pending(local)) {
1043 mod_timer(&local->dynamic_ps_timer, jiffies +
1045 local->hw.conf.dynamic_ps_timeout));
1050 * transmission can be stopped by others which leads to
1051 * dynamic_ps_timer expiry. Postpone the ps timer if it
1052 * is not the actual idle state.
1054 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1055 for (q = 0; q < local->hw.queues; q++) {
1056 if (local->queue_stop_reasons[q]) {
1057 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1059 mod_timer(&local->dynamic_ps_timer, jiffies +
1061 local->hw.conf.dynamic_ps_timeout));
1065 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1068 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1069 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1070 netif_tx_stop_all_queues(sdata->dev);
1072 if (drv_tx_frames_pending(local))
1073 mod_timer(&local->dynamic_ps_timer, jiffies +
1075 local->hw.conf.dynamic_ps_timeout));
1077 ieee80211_send_nullfunc(local, sdata, 1);
1078 /* Flush to get the tx status of nullfunc frame */
1079 drv_flush(local, false);
1083 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1084 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1085 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1086 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1087 local->hw.conf.flags |= IEEE80211_CONF_PS;
1088 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1091 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1092 netif_tx_wake_all_queues(sdata->dev);
1095 void ieee80211_dynamic_ps_timer(unsigned long data)
1097 struct ieee80211_local *local = (void *) data;
1099 if (local->quiescing || local->suspended)
1102 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1106 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
1107 struct ieee80211_sub_if_data *sdata,
1108 u8 *wmm_param, size_t wmm_param_len)
1110 struct ieee80211_tx_queue_params params;
1111 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1114 u8 *pos, uapsd_queues = 0;
1116 if (!local->ops->conf_tx)
1119 if (local->hw.queues < IEEE80211_NUM_ACS)
1125 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1128 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1129 uapsd_queues = ifmgd->uapsd_queues;
1131 count = wmm_param[6] & 0x0f;
1132 if (count == ifmgd->wmm_last_param_set)
1134 ifmgd->wmm_last_param_set = count;
1136 pos = wmm_param + 8;
1137 left = wmm_param_len - 8;
1139 memset(¶ms, 0, sizeof(params));
1142 for (; left >= 4; left -= 4, pos += 4) {
1143 int aci = (pos[0] >> 5) & 0x03;
1144 int acm = (pos[0] >> 4) & 0x01;
1152 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1153 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1159 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1160 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1166 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1167 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1174 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1175 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1180 params.aifs = pos[0] & 0x0f;
1181 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1182 params.cw_min = ecw2cw(pos[1] & 0x0f);
1183 params.txop = get_unaligned_le16(pos + 2);
1184 params.uapsd = uapsd;
1187 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1189 params.aifs, params.cw_min, params.cw_max,
1190 params.txop, params.uapsd);
1191 sdata->tx_conf[queue] = params;
1192 if (drv_conf_tx(local, sdata, queue, ¶ms))
1194 "failed to set TX queue parameters for queue %d\n",
1198 /* enable WMM or activate new settings */
1199 sdata->vif.bss_conf.qos = true;
1202 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1204 lockdep_assert_held(&sdata->local->mtx);
1206 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1207 IEEE80211_STA_BEACON_POLL);
1208 ieee80211_run_deferred_scan(sdata->local);
1211 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1213 mutex_lock(&sdata->local->mtx);
1214 __ieee80211_stop_poll(sdata);
1215 mutex_unlock(&sdata->local->mtx);
1218 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1219 u16 capab, bool erp_valid, u8 erp)
1221 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1223 bool use_protection;
1224 bool use_short_preamble;
1225 bool use_short_slot;
1228 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1229 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1231 use_protection = false;
1232 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1235 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1236 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1237 use_short_slot = true;
1239 if (use_protection != bss_conf->use_cts_prot) {
1240 bss_conf->use_cts_prot = use_protection;
1241 changed |= BSS_CHANGED_ERP_CTS_PROT;
1244 if (use_short_preamble != bss_conf->use_short_preamble) {
1245 bss_conf->use_short_preamble = use_short_preamble;
1246 changed |= BSS_CHANGED_ERP_PREAMBLE;
1249 if (use_short_slot != bss_conf->use_short_slot) {
1250 bss_conf->use_short_slot = use_short_slot;
1251 changed |= BSS_CHANGED_ERP_SLOT;
1257 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1258 struct cfg80211_bss *cbss,
1259 u32 bss_info_changed)
1261 struct ieee80211_bss *bss = (void *)cbss->priv;
1262 struct ieee80211_local *local = sdata->local;
1263 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1265 bss_info_changed |= BSS_CHANGED_ASSOC;
1266 /* set timing information */
1267 bss_conf->beacon_int = cbss->beacon_interval;
1268 bss_conf->last_tsf = cbss->tsf;
1270 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1271 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1272 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1274 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1275 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1277 sdata->u.mgd.associated = cbss;
1278 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1280 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1282 /* just to be sure */
1283 ieee80211_stop_poll(sdata);
1285 ieee80211_led_assoc(local, 1);
1287 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1288 bss_conf->dtim_period = bss->dtim_period;
1290 bss_conf->dtim_period = 0;
1292 bss_conf->assoc = 1;
1294 /* Tell the driver to monitor connection quality (if supported) */
1295 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1296 bss_conf->cqm_rssi_thold)
1297 bss_info_changed |= BSS_CHANGED_CQM;
1299 /* Enable ARP filtering */
1300 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1301 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1302 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1305 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1307 mutex_lock(&local->iflist_mtx);
1308 ieee80211_recalc_ps(local, -1);
1309 ieee80211_recalc_smps(local);
1310 mutex_unlock(&local->iflist_mtx);
1312 netif_tx_start_all_queues(sdata->dev);
1313 netif_carrier_on(sdata->dev);
1316 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1317 u16 stype, u16 reason, bool tx,
1320 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1321 struct ieee80211_local *local = sdata->local;
1322 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 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1338 ifmgd->associated = NULL;
1339 memset(ifmgd->bssid, 0, ETH_ALEN);
1342 * we need to commit the associated = NULL change because the
1343 * scan code uses that to determine whether this iface should
1344 * go to/wake up from powersave or not -- and could otherwise
1345 * wake the queues erroneously.
1350 * Thus, we can only afterwards stop the queues -- to account
1351 * for the case where another CPU is finishing a scan at this
1352 * time -- we don't want the scan code to enable queues.
1355 netif_tx_stop_all_queues(sdata->dev);
1356 netif_carrier_off(sdata->dev);
1358 mutex_lock(&local->sta_mtx);
1359 sta = sta_info_get(sdata, bssid);
1361 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1362 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1364 mutex_unlock(&local->sta_mtx);
1366 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1368 drv_flush(local, false);
1370 /* deauthenticate/disassociate now */
1371 if (tx || frame_buf)
1372 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1375 /* flush out frame */
1377 drv_flush(local, false);
1379 /* remove AP and TDLS peers */
1380 sta_info_flush(local, sdata);
1382 /* finally reset all BSS / config parameters */
1383 changed |= ieee80211_reset_erp_info(sdata);
1385 ieee80211_led_assoc(local, 0);
1386 changed |= BSS_CHANGED_ASSOC;
1387 sdata->vif.bss_conf.assoc = false;
1389 /* on the next assoc, re-program HT parameters */
1390 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1391 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1393 local->power_constr_level = 0;
1395 del_timer_sync(&local->dynamic_ps_timer);
1396 cancel_work_sync(&local->dynamic_ps_enable_work);
1398 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1399 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1400 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1402 local->ps_sdata = NULL;
1404 /* Disable ARP filtering */
1405 if (sdata->vif.bss_conf.arp_filter_enabled) {
1406 sdata->vif.bss_conf.arp_filter_enabled = false;
1407 changed |= BSS_CHANGED_ARP_FILTER;
1410 sdata->vif.bss_conf.qos = false;
1411 changed |= BSS_CHANGED_QOS;
1413 /* The BSSID (not really interesting) and HT changed */
1414 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1415 ieee80211_bss_info_change_notify(sdata, changed);
1417 /* channel(_type) changes are handled by ieee80211_hw_config */
1418 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1419 ieee80211_hw_config(local, 0);
1421 /* disassociated - set to defaults now */
1422 ieee80211_set_wmm_default(sdata, false);
1424 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1425 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1426 del_timer_sync(&sdata->u.mgd.timer);
1427 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1430 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1431 struct ieee80211_hdr *hdr)
1434 * We can postpone the mgd.timer whenever receiving unicast frames
1435 * from AP because we know that the connection is working both ways
1436 * at that time. But multicast frames (and hence also beacons) must
1437 * be ignored here, because we need to trigger the timer during
1438 * data idle periods for sending the periodic probe request to the
1439 * AP we're connected to.
1441 if (is_multicast_ether_addr(hdr->addr1))
1444 ieee80211_sta_reset_conn_monitor(sdata);
1447 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1450 struct ieee80211_local *local = sdata->local;
1452 mutex_lock(&local->mtx);
1453 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1454 IEEE80211_STA_CONNECTION_POLL))) {
1455 mutex_unlock(&local->mtx);
1459 __ieee80211_stop_poll(sdata);
1461 mutex_lock(&local->iflist_mtx);
1462 ieee80211_recalc_ps(local, -1);
1463 mutex_unlock(&local->iflist_mtx);
1465 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1469 * We've received a probe response, but are not sure whether
1470 * we have or will be receiving any beacons or data, so let's
1471 * schedule the timers again, just in case.
1473 ieee80211_sta_reset_beacon_monitor(sdata);
1475 mod_timer(&ifmgd->conn_mon_timer,
1476 round_jiffies_up(jiffies +
1477 IEEE80211_CONNECTION_IDLE_TIME));
1479 mutex_unlock(&local->mtx);
1482 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1483 struct ieee80211_hdr *hdr, bool ack)
1485 if (!ieee80211_is_data(hdr->frame_control))
1489 ieee80211_sta_reset_conn_monitor(sdata);
1491 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1492 sdata->u.mgd.probe_send_count > 0) {
1494 sdata->u.mgd.probe_send_count = 0;
1496 sdata->u.mgd.nullfunc_failed = true;
1497 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1501 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1505 u8 *dst = ifmgd->associated->bssid;
1506 u8 unicast_limit = max(1, max_probe_tries - 3);
1509 * Try sending broadcast probe requests for the last three
1510 * probe requests after the first ones failed since some
1511 * buggy APs only support broadcast probe requests.
1513 if (ifmgd->probe_send_count >= unicast_limit)
1517 * When the hardware reports an accurate Tx ACK status, it's
1518 * better to send a nullfunc frame instead of a probe request,
1519 * as it will kick us off the AP quickly if we aren't associated
1520 * anymore. The timeout will be reset if the frame is ACKed by
1523 ifmgd->probe_send_count++;
1525 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1526 ifmgd->nullfunc_failed = false;
1527 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1531 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1532 if (WARN_ON_ONCE(ssid == NULL))
1537 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1538 0, (u32) -1, true, false);
1541 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1542 run_again(ifmgd, ifmgd->probe_timeout);
1543 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1544 drv_flush(sdata->local, false);
1547 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1550 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1551 bool already = false;
1553 if (!ieee80211_sdata_running(sdata))
1556 mutex_lock(&ifmgd->mtx);
1558 if (!ifmgd->associated)
1561 mutex_lock(&sdata->local->mtx);
1563 if (sdata->local->tmp_channel || sdata->local->scanning) {
1564 mutex_unlock(&sdata->local->mtx);
1569 mlme_dbg_ratelimited(sdata,
1570 "detected beacon loss from AP - sending probe request\n");
1572 ieee80211_cqm_rssi_notify(&sdata->vif,
1573 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
1576 * The driver/our work has already reported this event or the
1577 * connection monitoring has kicked in and we have already sent
1578 * a probe request. Or maybe the AP died and the driver keeps
1579 * reporting until we disassociate...
1581 * In either case we have to ignore the current call to this
1582 * function (except for setting the correct probe reason bit)
1583 * because otherwise we would reset the timer every time and
1584 * never check whether we received a probe response!
1586 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1587 IEEE80211_STA_CONNECTION_POLL))
1591 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1593 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1595 mutex_unlock(&sdata->local->mtx);
1600 mutex_lock(&sdata->local->iflist_mtx);
1601 ieee80211_recalc_ps(sdata->local, -1);
1602 mutex_unlock(&sdata->local->iflist_mtx);
1604 ifmgd->probe_send_count = 0;
1605 ieee80211_mgd_probe_ap_send(sdata);
1607 mutex_unlock(&ifmgd->mtx);
1610 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1611 struct ieee80211_vif *vif)
1613 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1615 struct sk_buff *skb;
1619 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1622 ASSERT_MGD_MTX(ifmgd);
1624 if (!ifmgd->associated)
1627 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1628 if (WARN_ON_ONCE(ssid == NULL))
1633 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1634 (u32) -1, ssid + 2, ssid_len,
1639 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1641 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1644 struct ieee80211_local *local = sdata->local;
1646 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1648 mutex_lock(&ifmgd->mtx);
1649 if (!ifmgd->associated) {
1650 mutex_unlock(&ifmgd->mtx);
1654 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1656 sdata_info(sdata, "Connection to AP %pM lost\n", bssid);
1658 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1659 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1661 mutex_unlock(&ifmgd->mtx);
1664 * must be outside lock due to cfg80211,
1665 * but that's not a problem.
1667 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
1669 mutex_lock(&local->mtx);
1670 ieee80211_recalc_idle(local);
1671 mutex_unlock(&local->mtx);
1674 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1676 struct ieee80211_sub_if_data *sdata =
1677 container_of(work, struct ieee80211_sub_if_data,
1678 u.mgd.beacon_connection_loss_work);
1679 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1680 struct sta_info *sta;
1682 if (ifmgd->associated) {
1684 sta = sta_info_get(sdata, ifmgd->bssid);
1686 sta->beacon_loss_count++;
1690 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1691 __ieee80211_connection_loss(sdata);
1693 ieee80211_mgd_probe_ap(sdata, true);
1696 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1698 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1699 struct ieee80211_hw *hw = &sdata->local->hw;
1701 trace_api_beacon_loss(sdata);
1703 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1704 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1706 EXPORT_SYMBOL(ieee80211_beacon_loss);
1708 void ieee80211_connection_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_connection_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_connection_loss);
1721 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1724 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1726 lockdep_assert_held(&sdata->u.mgd.mtx);
1729 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1731 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1732 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1735 cfg80211_put_bss(auth_data->bss);
1737 sdata->u.mgd.auth_data = NULL;
1740 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1741 struct ieee80211_mgmt *mgmt, size_t len)
1743 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1745 struct ieee802_11_elems elems;
1747 pos = mgmt->u.auth.variable;
1748 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1749 if (!elems.challenge)
1751 auth_data->expected_transaction = 4;
1752 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1753 elems.challenge - 2, elems.challenge_len + 2,
1754 auth_data->bss->bssid, auth_data->bss->bssid,
1755 auth_data->key, auth_data->key_len,
1756 auth_data->key_idx);
1759 static enum rx_mgmt_action __must_check
1760 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1761 struct ieee80211_mgmt *mgmt, size_t len)
1763 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1765 u16 auth_alg, auth_transaction, status_code;
1766 struct sta_info *sta;
1768 lockdep_assert_held(&ifmgd->mtx);
1771 return RX_MGMT_NONE;
1773 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1774 return RX_MGMT_NONE;
1776 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1778 if (!ether_addr_equal(bssid, mgmt->bssid))
1779 return RX_MGMT_NONE;
1781 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1782 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1783 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1785 if (auth_alg != ifmgd->auth_data->algorithm ||
1786 auth_transaction != ifmgd->auth_data->expected_transaction)
1787 return RX_MGMT_NONE;
1789 if (status_code != WLAN_STATUS_SUCCESS) {
1790 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1791 mgmt->sa, status_code);
1792 ieee80211_destroy_auth_data(sdata, false);
1793 return RX_MGMT_CFG80211_RX_AUTH;
1796 switch (ifmgd->auth_data->algorithm) {
1797 case WLAN_AUTH_OPEN:
1798 case WLAN_AUTH_LEAP:
1801 case WLAN_AUTH_SHARED_KEY:
1802 if (ifmgd->auth_data->expected_transaction != 4) {
1803 ieee80211_auth_challenge(sdata, mgmt, len);
1804 /* need another frame */
1805 return RX_MGMT_NONE;
1809 WARN_ONCE(1, "invalid auth alg %d",
1810 ifmgd->auth_data->algorithm);
1811 return RX_MGMT_NONE;
1814 sdata_info(sdata, "authenticated\n");
1815 ifmgd->auth_data->done = true;
1816 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1817 run_again(ifmgd, ifmgd->auth_data->timeout);
1819 /* move station state to auth */
1820 mutex_lock(&sdata->local->sta_mtx);
1821 sta = sta_info_get(sdata, bssid);
1823 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1826 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1827 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
1830 mutex_unlock(&sdata->local->sta_mtx);
1832 return RX_MGMT_CFG80211_RX_AUTH;
1834 mutex_unlock(&sdata->local->sta_mtx);
1835 /* ignore frame -- wait for timeout */
1836 return RX_MGMT_NONE;
1840 static enum rx_mgmt_action __must_check
1841 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1842 struct ieee80211_mgmt *mgmt, size_t len)
1844 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1845 const u8 *bssid = NULL;
1848 lockdep_assert_held(&ifmgd->mtx);
1851 return RX_MGMT_NONE;
1853 if (!ifmgd->associated ||
1854 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1855 return RX_MGMT_NONE;
1857 bssid = ifmgd->associated->bssid;
1859 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1861 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1862 bssid, reason_code);
1864 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1866 mutex_lock(&sdata->local->mtx);
1867 ieee80211_recalc_idle(sdata->local);
1868 mutex_unlock(&sdata->local->mtx);
1870 return RX_MGMT_CFG80211_DEAUTH;
1874 static enum rx_mgmt_action __must_check
1875 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1876 struct ieee80211_mgmt *mgmt, size_t len)
1878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1881 lockdep_assert_held(&ifmgd->mtx);
1884 return RX_MGMT_NONE;
1886 if (!ifmgd->associated ||
1887 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1888 return RX_MGMT_NONE;
1890 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1892 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
1893 mgmt->sa, reason_code);
1895 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1897 mutex_lock(&sdata->local->mtx);
1898 ieee80211_recalc_idle(sdata->local);
1899 mutex_unlock(&sdata->local->mtx);
1901 return RX_MGMT_CFG80211_DISASSOC;
1904 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1905 u8 *supp_rates, unsigned int supp_rates_len,
1906 u32 *rates, u32 *basic_rates,
1907 bool *have_higher_than_11mbit,
1908 int *min_rate, int *min_rate_index)
1912 for (i = 0; i < supp_rates_len; i++) {
1913 int rate = (supp_rates[i] & 0x7f) * 5;
1914 bool is_basic = !!(supp_rates[i] & 0x80);
1917 *have_higher_than_11mbit = true;
1920 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1921 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1923 * Note: Even through the membership selector and the basic
1924 * rate flag share the same bit, they are not exactly
1927 if (!!(supp_rates[i] & 0x80) &&
1928 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1931 for (j = 0; j < sband->n_bitrates; j++) {
1932 if (sband->bitrates[j].bitrate == rate) {
1935 *basic_rates |= BIT(j);
1936 if (rate < *min_rate) {
1938 *min_rate_index = j;
1946 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1949 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1951 lockdep_assert_held(&sdata->u.mgd.mtx);
1954 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1956 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1957 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1961 sdata->u.mgd.assoc_data = NULL;
1964 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1965 struct cfg80211_bss *cbss,
1966 struct ieee80211_mgmt *mgmt, size_t len)
1968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1969 struct ieee80211_local *local = sdata->local;
1970 struct ieee80211_supported_band *sband;
1971 struct sta_info *sta;
1973 u16 capab_info, aid;
1974 struct ieee802_11_elems elems;
1975 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1979 /* AssocResp and ReassocResp have identical structure */
1981 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1982 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1984 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1985 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
1987 aid &= ~(BIT(15) | BIT(14));
1989 ifmgd->broken_ap = false;
1991 if (aid == 0 || aid > IEEE80211_MAX_AID) {
1992 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
1995 ifmgd->broken_ap = true;
1998 pos = mgmt->u.assoc_resp.variable;
1999 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2001 if (!elems.supp_rates) {
2002 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2008 mutex_lock(&sdata->local->sta_mtx);
2010 * station info was already allocated and inserted before
2011 * the association and should be available to us
2013 sta = sta_info_get(sdata, cbss->bssid);
2014 if (WARN_ON(!sta)) {
2015 mutex_unlock(&sdata->local->sta_mtx);
2019 sband = local->hw.wiphy->bands[local->oper_channel->band];
2021 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2022 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2023 elems.ht_cap_elem, &sta->sta.ht_cap);
2025 sta->supports_40mhz =
2026 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2028 rate_control_rate_init(sta);
2030 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2031 set_sta_flag(sta, WLAN_STA_MFP);
2033 if (elems.wmm_param)
2034 set_sta_flag(sta, WLAN_STA_WME);
2036 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2038 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2039 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2040 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2043 "failed to move station %pM to desired state\n",
2045 WARN_ON(__sta_info_destroy(sta));
2046 mutex_unlock(&sdata->local->sta_mtx);
2050 mutex_unlock(&sdata->local->sta_mtx);
2053 * Always handle WMM once after association regardless
2054 * of the first value the AP uses. Setting -1 here has
2055 * that effect because the AP values is an unsigned
2058 ifmgd->wmm_last_param_set = -1;
2060 if (elems.wmm_param)
2061 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2062 elems.wmm_param_len);
2064 ieee80211_set_wmm_default(sdata, false);
2065 changed |= BSS_CHANGED_QOS;
2067 if (elems.ht_operation && elems.wmm_param &&
2068 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2069 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2070 cbss->bssid, false);
2072 /* set AID and assoc capability,
2073 * ieee80211_set_associated() will tell the driver */
2074 bss_conf->aid = aid;
2075 bss_conf->assoc_capability = capab_info;
2076 ieee80211_set_associated(sdata, cbss, changed);
2079 * If we're using 4-addr mode, let the AP know that we're
2080 * doing so, so that it can create the STA VLAN on its side
2082 if (ifmgd->use_4addr)
2083 ieee80211_send_4addr_nullfunc(local, sdata);
2086 * Start timer to probe the connection to the AP now.
2087 * Also start the timer that will detect beacon loss.
2089 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2090 ieee80211_sta_reset_beacon_monitor(sdata);
2095 static enum rx_mgmt_action __must_check
2096 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2097 struct ieee80211_mgmt *mgmt, size_t len,
2098 struct cfg80211_bss **bss)
2100 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2101 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2102 u16 capab_info, status_code, aid;
2103 struct ieee802_11_elems elems;
2107 lockdep_assert_held(&ifmgd->mtx);
2110 return RX_MGMT_NONE;
2111 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2112 return RX_MGMT_NONE;
2115 * AssocResp and ReassocResp have identical structure, so process both
2116 * of them in this function.
2120 return RX_MGMT_NONE;
2122 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2123 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2124 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2125 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2128 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2129 reassoc ? "Rea" : "A", mgmt->sa,
2130 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2132 pos = mgmt->u.assoc_resp.variable;
2133 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2135 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2136 elems.timeout_int && elems.timeout_int_len == 5 &&
2137 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2139 tu = get_unaligned_le32(elems.timeout_int + 1);
2140 ms = tu * 1024 / 1000;
2142 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2144 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2145 if (ms > IEEE80211_ASSOC_TIMEOUT)
2146 run_again(ifmgd, assoc_data->timeout);
2147 return RX_MGMT_NONE;
2150 *bss = assoc_data->bss;
2152 if (status_code != WLAN_STATUS_SUCCESS) {
2153 sdata_info(sdata, "%pM denied association (code=%d)\n",
2154 mgmt->sa, status_code);
2155 ieee80211_destroy_assoc_data(sdata, false);
2157 sdata_info(sdata, "associated\n");
2159 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2160 /* oops -- internal error -- send timeout for now */
2161 ieee80211_destroy_assoc_data(sdata, true);
2162 sta_info_destroy_addr(sdata, mgmt->bssid);
2163 cfg80211_put_bss(*bss);
2164 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2168 * destroy assoc_data afterwards, as otherwise an idle
2169 * recalc after assoc_data is NULL but before associated
2170 * is set can cause the interface to go idle
2172 ieee80211_destroy_assoc_data(sdata, true);
2175 return RX_MGMT_CFG80211_RX_ASSOC;
2177 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2178 struct ieee80211_mgmt *mgmt,
2180 struct ieee80211_rx_status *rx_status,
2181 struct ieee802_11_elems *elems,
2184 struct ieee80211_local *local = sdata->local;
2186 struct ieee80211_bss *bss;
2187 struct ieee80211_channel *channel;
2188 bool need_ps = false;
2190 if (sdata->u.mgd.associated &&
2191 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
2192 bss = (void *)sdata->u.mgd.associated->priv;
2193 /* not previously set so we may need to recalc */
2194 need_ps = !bss->dtim_period;
2197 if (elems->ds_params && elems->ds_params_len == 1)
2198 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2201 freq = rx_status->freq;
2203 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2205 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2208 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2211 ieee80211_rx_bss_put(local, bss);
2213 if (!sdata->u.mgd.associated)
2217 mutex_lock(&local->iflist_mtx);
2218 ieee80211_recalc_ps(local, -1);
2219 mutex_unlock(&local->iflist_mtx);
2222 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
2223 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
2225 struct ieee80211_channel_sw_ie *sw_elem =
2226 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
2227 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2228 bss, rx_status->mactime);
2233 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2234 struct sk_buff *skb)
2236 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2237 struct ieee80211_if_managed *ifmgd;
2238 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2239 size_t baselen, len = skb->len;
2240 struct ieee802_11_elems elems;
2242 ifmgd = &sdata->u.mgd;
2244 ASSERT_MGD_MTX(ifmgd);
2246 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2247 return; /* ignore ProbeResp to foreign address */
2249 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2253 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2256 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2258 if (ifmgd->associated &&
2259 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2260 ieee80211_reset_ap_probe(sdata);
2262 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2263 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2264 /* got probe response, continue with auth */
2265 sdata_info(sdata, "direct probe responded\n");
2266 ifmgd->auth_data->tries = 0;
2267 ifmgd->auth_data->timeout = jiffies;
2268 run_again(ifmgd, ifmgd->auth_data->timeout);
2273 * This is the canonical list of information elements we care about,
2274 * the filter code also gives us all changes to the Microsoft OUI
2275 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2277 * We implement beacon filtering in software since that means we can
2278 * avoid processing the frame here and in cfg80211, and userspace
2279 * will not be able to tell whether the hardware supports it or not.
2281 * XXX: This list needs to be dynamic -- userspace needs to be able to
2282 * add items it requires. It also needs to be able to tell us to
2283 * look out for other vendor IEs.
2285 static const u64 care_about_ies =
2286 (1ULL << WLAN_EID_COUNTRY) |
2287 (1ULL << WLAN_EID_ERP_INFO) |
2288 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2289 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2290 (1ULL << WLAN_EID_HT_CAPABILITY) |
2291 (1ULL << WLAN_EID_HT_OPERATION);
2293 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2294 struct ieee80211_mgmt *mgmt,
2296 struct ieee80211_rx_status *rx_status)
2298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2299 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2301 struct ieee802_11_elems elems;
2302 struct ieee80211_local *local = sdata->local;
2304 bool erp_valid, directed_tim = false;
2309 lockdep_assert_held(&ifmgd->mtx);
2311 /* Process beacon from the current BSS */
2312 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2316 if (rx_status->freq != local->hw.conf.channel->center_freq)
2319 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2320 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2321 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2322 len - baselen, &elems);
2324 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2326 ifmgd->assoc_data->have_beacon = true;
2327 ifmgd->assoc_data->sent_assoc = false;
2328 /* continue assoc process */
2329 ifmgd->assoc_data->timeout = jiffies;
2330 run_again(ifmgd, ifmgd->assoc_data->timeout);
2334 if (!ifmgd->associated ||
2335 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2337 bssid = ifmgd->associated->bssid;
2339 /* Track average RSSI from the Beacon frames of the current AP */
2340 ifmgd->last_beacon_signal = rx_status->signal;
2341 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2342 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2343 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2344 ifmgd->last_cqm_event_signal = 0;
2345 ifmgd->count_beacon_signal = 1;
2346 ifmgd->last_ave_beacon_signal = 0;
2348 ifmgd->ave_beacon_signal =
2349 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2350 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2351 ifmgd->ave_beacon_signal) / 16;
2352 ifmgd->count_beacon_signal++;
2355 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2356 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2357 int sig = ifmgd->ave_beacon_signal;
2358 int last_sig = ifmgd->last_ave_beacon_signal;
2361 * if signal crosses either of the boundaries, invoke callback
2362 * with appropriate parameters
2364 if (sig > ifmgd->rssi_max_thold &&
2365 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2366 ifmgd->last_ave_beacon_signal = sig;
2367 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2368 } else if (sig < ifmgd->rssi_min_thold &&
2369 (last_sig >= ifmgd->rssi_max_thold ||
2371 ifmgd->last_ave_beacon_signal = sig;
2372 drv_rssi_callback(local, RSSI_EVENT_LOW);
2376 if (bss_conf->cqm_rssi_thold &&
2377 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2378 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2379 int sig = ifmgd->ave_beacon_signal / 16;
2380 int last_event = ifmgd->last_cqm_event_signal;
2381 int thold = bss_conf->cqm_rssi_thold;
2382 int hyst = bss_conf->cqm_rssi_hyst;
2384 (last_event == 0 || sig < last_event - hyst)) {
2385 ifmgd->last_cqm_event_signal = sig;
2386 ieee80211_cqm_rssi_notify(
2388 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2390 } else if (sig > thold &&
2391 (last_event == 0 || sig > last_event + hyst)) {
2392 ifmgd->last_cqm_event_signal = sig;
2393 ieee80211_cqm_rssi_notify(
2395 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2400 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2401 mlme_dbg_ratelimited(sdata,
2402 "cancelling probereq poll due to a received beacon\n");
2403 mutex_lock(&local->mtx);
2404 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2405 ieee80211_run_deferred_scan(local);
2406 mutex_unlock(&local->mtx);
2408 mutex_lock(&local->iflist_mtx);
2409 ieee80211_recalc_ps(local, -1);
2410 mutex_unlock(&local->iflist_mtx);
2414 * Push the beacon loss detection into the future since
2415 * we are processing a beacon from the AP just now.
2417 ieee80211_sta_reset_beacon_monitor(sdata);
2419 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2420 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2421 len - baselen, &elems,
2422 care_about_ies, ncrc);
2424 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2425 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2428 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
2429 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2432 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2433 elems.wmm_param_len);
2436 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2438 if (local->hw.conf.dynamic_ps_timeout > 0) {
2439 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2440 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2441 ieee80211_hw_config(local,
2442 IEEE80211_CONF_CHANGE_PS);
2444 ieee80211_send_nullfunc(local, sdata, 0);
2445 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2446 local->pspolling = true;
2449 * Here is assumed that the driver will be
2450 * able to send ps-poll frame and receive a
2451 * response even though power save mode is
2452 * enabled, but some drivers might require
2453 * to disable power save here. This needs
2454 * to be investigated.
2456 ieee80211_send_pspoll(local, sdata);
2461 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2463 ifmgd->beacon_crc = ncrc;
2464 ifmgd->beacon_crc_valid = true;
2466 if (elems.erp_info && elems.erp_info_len >= 1) {
2468 erp_value = elems.erp_info[0];
2472 changed |= ieee80211_handle_bss_capability(sdata,
2473 le16_to_cpu(mgmt->u.beacon.capab_info),
2474 erp_valid, erp_value);
2477 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
2478 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
2479 struct ieee80211_supported_band *sband;
2481 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2483 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2487 /* Note: country IE parsing is done for us by cfg80211 */
2488 if (elems.country_elem) {
2489 /* TODO: IBSS also needs this */
2490 if (elems.pwr_constr_elem)
2491 ieee80211_handle_pwr_constr(sdata,
2492 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2493 elems.pwr_constr_elem,
2494 elems.pwr_constr_elem_len);
2497 ieee80211_bss_info_change_notify(sdata, changed);
2500 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2501 struct sk_buff *skb)
2503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2504 struct ieee80211_rx_status *rx_status;
2505 struct ieee80211_mgmt *mgmt;
2506 struct cfg80211_bss *bss = NULL;
2507 enum rx_mgmt_action rma = RX_MGMT_NONE;
2510 rx_status = (struct ieee80211_rx_status *) skb->cb;
2511 mgmt = (struct ieee80211_mgmt *) skb->data;
2512 fc = le16_to_cpu(mgmt->frame_control);
2514 mutex_lock(&ifmgd->mtx);
2516 switch (fc & IEEE80211_FCTL_STYPE) {
2517 case IEEE80211_STYPE_BEACON:
2518 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2520 case IEEE80211_STYPE_PROBE_RESP:
2521 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2523 case IEEE80211_STYPE_AUTH:
2524 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2526 case IEEE80211_STYPE_DEAUTH:
2527 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2529 case IEEE80211_STYPE_DISASSOC:
2530 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2532 case IEEE80211_STYPE_ASSOC_RESP:
2533 case IEEE80211_STYPE_REASSOC_RESP:
2534 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2536 case IEEE80211_STYPE_ACTION:
2537 switch (mgmt->u.action.category) {
2538 case WLAN_CATEGORY_SPECTRUM_MGMT:
2539 ieee80211_sta_process_chanswitch(sdata,
2540 &mgmt->u.action.u.chan_switch.sw_elem,
2541 (void *)ifmgd->associated->priv,
2542 rx_status->mactime);
2546 mutex_unlock(&ifmgd->mtx);
2552 case RX_MGMT_CFG80211_DEAUTH:
2553 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2555 case RX_MGMT_CFG80211_DISASSOC:
2556 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2558 case RX_MGMT_CFG80211_RX_AUTH:
2559 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2561 case RX_MGMT_CFG80211_RX_ASSOC:
2562 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2564 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2565 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2568 WARN(1, "unexpected: %d", rma);
2572 static void ieee80211_sta_timer(unsigned long data)
2574 struct ieee80211_sub_if_data *sdata =
2575 (struct ieee80211_sub_if_data *) data;
2576 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2577 struct ieee80211_local *local = sdata->local;
2579 if (local->quiescing) {
2580 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2584 ieee80211_queue_work(&local->hw, &sdata->work);
2587 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2588 u8 *bssid, u8 reason)
2590 struct ieee80211_local *local = sdata->local;
2591 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2592 u8 frame_buf[DEAUTH_DISASSOC_LEN];
2594 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2596 mutex_unlock(&ifmgd->mtx);
2599 * must be outside lock due to cfg80211,
2600 * but that's not a problem.
2602 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
2604 mutex_lock(&local->mtx);
2605 ieee80211_recalc_idle(local);
2606 mutex_unlock(&local->mtx);
2608 mutex_lock(&ifmgd->mtx);
2611 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2613 struct ieee80211_local *local = sdata->local;
2614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2615 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2617 lockdep_assert_held(&ifmgd->mtx);
2619 if (WARN_ON_ONCE(!auth_data))
2624 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2625 sdata_info(sdata, "authentication with %pM timed out\n",
2626 auth_data->bss->bssid);
2629 * Most likely AP is not in the range so remove the
2630 * bss struct for that AP.
2632 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2637 if (auth_data->bss->proberesp_ies) {
2638 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2639 auth_data->bss->bssid, auth_data->tries,
2640 IEEE80211_AUTH_MAX_TRIES);
2642 auth_data->expected_transaction = 2;
2643 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2644 auth_data->ie, auth_data->ie_len,
2645 auth_data->bss->bssid,
2646 auth_data->bss->bssid, NULL, 0, 0);
2650 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2651 auth_data->bss->bssid, auth_data->tries,
2652 IEEE80211_AUTH_MAX_TRIES);
2654 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2658 * Direct probe is sent to broadcast address as some APs
2659 * will not answer to direct packet in unassociated state.
2661 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2662 NULL, 0, (u32) -1, true, false);
2665 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2666 run_again(ifmgd, auth_data->timeout);
2671 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2673 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2674 struct ieee80211_local *local = sdata->local;
2676 lockdep_assert_held(&sdata->u.mgd.mtx);
2678 assoc_data->tries++;
2679 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2680 sdata_info(sdata, "association with %pM timed out\n",
2681 assoc_data->bss->bssid);
2684 * Most likely AP is not in the range so remove the
2685 * bss struct for that AP.
2687 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2692 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2693 assoc_data->bss->bssid, assoc_data->tries,
2694 IEEE80211_ASSOC_MAX_TRIES);
2695 ieee80211_send_assoc(sdata);
2697 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2698 run_again(&sdata->u.mgd, assoc_data->timeout);
2703 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2705 struct ieee80211_local *local = sdata->local;
2706 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2708 mutex_lock(&ifmgd->mtx);
2710 if (ifmgd->auth_data &&
2711 time_after(jiffies, ifmgd->auth_data->timeout)) {
2712 if (ifmgd->auth_data->done) {
2714 * ok ... we waited for assoc but userspace didn't,
2715 * so let's just kill the auth data
2717 ieee80211_destroy_auth_data(sdata, false);
2718 } else if (ieee80211_probe_auth(sdata)) {
2721 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2723 ieee80211_destroy_auth_data(sdata, false);
2725 mutex_unlock(&ifmgd->mtx);
2726 cfg80211_send_auth_timeout(sdata->dev, bssid);
2727 mutex_lock(&ifmgd->mtx);
2729 } else if (ifmgd->auth_data)
2730 run_again(ifmgd, ifmgd->auth_data->timeout);
2732 if (ifmgd->assoc_data &&
2733 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2734 if (!ifmgd->assoc_data->have_beacon ||
2735 ieee80211_do_assoc(sdata)) {
2738 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2740 ieee80211_destroy_assoc_data(sdata, false);
2742 mutex_unlock(&ifmgd->mtx);
2743 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2744 mutex_lock(&ifmgd->mtx);
2746 } else if (ifmgd->assoc_data)
2747 run_again(ifmgd, ifmgd->assoc_data->timeout);
2749 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2750 IEEE80211_STA_CONNECTION_POLL) &&
2751 ifmgd->associated) {
2755 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2757 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2758 max_tries = max_nullfunc_tries;
2760 max_tries = max_probe_tries;
2762 /* ACK received for nullfunc probing frame */
2763 if (!ifmgd->probe_send_count)
2764 ieee80211_reset_ap_probe(sdata);
2765 else if (ifmgd->nullfunc_failed) {
2766 if (ifmgd->probe_send_count < max_tries) {
2768 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2769 bssid, ifmgd->probe_send_count,
2771 ieee80211_mgd_probe_ap_send(sdata);
2774 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2776 ieee80211_sta_connection_lost(sdata, bssid,
2777 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2779 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2780 run_again(ifmgd, ifmgd->probe_timeout);
2781 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2783 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2784 bssid, probe_wait_ms);
2785 ieee80211_sta_connection_lost(sdata, bssid,
2786 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2787 } else if (ifmgd->probe_send_count < max_tries) {
2789 "No probe response from AP %pM after %dms, try %d/%i\n",
2790 bssid, probe_wait_ms,
2791 ifmgd->probe_send_count, max_tries);
2792 ieee80211_mgd_probe_ap_send(sdata);
2795 * We actually lost the connection ... or did we?
2798 wiphy_debug(local->hw.wiphy,
2799 "%s: No probe response from AP %pM"
2800 " after %dms, disconnecting.\n",
2802 bssid, probe_wait_ms);
2804 ieee80211_sta_connection_lost(sdata, bssid,
2805 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2809 mutex_unlock(&ifmgd->mtx);
2811 mutex_lock(&local->mtx);
2812 ieee80211_recalc_idle(local);
2813 mutex_unlock(&local->mtx);
2816 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2818 struct ieee80211_sub_if_data *sdata =
2819 (struct ieee80211_sub_if_data *) data;
2820 struct ieee80211_local *local = sdata->local;
2822 if (local->quiescing)
2825 ieee80211_queue_work(&sdata->local->hw,
2826 &sdata->u.mgd.beacon_connection_loss_work);
2829 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2831 struct ieee80211_sub_if_data *sdata =
2832 (struct ieee80211_sub_if_data *) data;
2833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2834 struct ieee80211_local *local = sdata->local;
2836 if (local->quiescing)
2839 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2842 static void ieee80211_sta_monitor_work(struct work_struct *work)
2844 struct ieee80211_sub_if_data *sdata =
2845 container_of(work, struct ieee80211_sub_if_data,
2846 u.mgd.monitor_work);
2848 ieee80211_mgd_probe_ap(sdata, false);
2851 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2855 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2856 __ieee80211_stop_poll(sdata);
2858 /* let's probe the connection once */
2859 flags = sdata->local->hw.flags;
2860 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2861 ieee80211_queue_work(&sdata->local->hw,
2862 &sdata->u.mgd.monitor_work);
2863 /* and do all the other regular work too */
2864 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2869 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2871 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2874 * we need to use atomic bitops for the running bits
2875 * only because both timers might fire at the same
2876 * time -- the code here is properly synchronised.
2879 cancel_work_sync(&ifmgd->request_smps_work);
2881 cancel_work_sync(&ifmgd->monitor_work);
2882 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
2883 if (del_timer_sync(&ifmgd->timer))
2884 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2886 cancel_work_sync(&ifmgd->chswitch_work);
2887 if (del_timer_sync(&ifmgd->chswitch_timer))
2888 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2890 /* these will just be re-established on connection */
2891 del_timer_sync(&ifmgd->conn_mon_timer);
2892 del_timer_sync(&ifmgd->bcn_mon_timer);
2895 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2899 if (!ifmgd->associated)
2902 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2903 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2904 mutex_lock(&ifmgd->mtx);
2905 if (ifmgd->associated) {
2907 "driver requested disconnect after resume\n");
2908 ieee80211_sta_connection_lost(sdata,
2909 ifmgd->associated->bssid,
2910 WLAN_REASON_UNSPECIFIED);
2911 mutex_unlock(&ifmgd->mtx);
2914 mutex_unlock(&ifmgd->mtx);
2917 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2918 add_timer(&ifmgd->timer);
2919 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2920 add_timer(&ifmgd->chswitch_timer);
2921 ieee80211_sta_reset_beacon_monitor(sdata);
2923 mutex_lock(&sdata->local->mtx);
2924 ieee80211_restart_sta_timer(sdata);
2925 mutex_unlock(&sdata->local->mtx);
2929 /* interface setup */
2930 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2932 struct ieee80211_if_managed *ifmgd;
2934 ifmgd = &sdata->u.mgd;
2935 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2936 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2937 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2938 ieee80211_beacon_connection_loss_work);
2939 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
2940 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2941 (unsigned long) sdata);
2942 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2943 (unsigned long) sdata);
2944 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2945 (unsigned long) sdata);
2946 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2947 (unsigned long) sdata);
2950 ifmgd->powersave = sdata->wdev.ps;
2951 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2952 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
2954 mutex_init(&ifmgd->mtx);
2956 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2957 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2959 ifmgd->req_smps = IEEE80211_SMPS_OFF;
2962 /* scan finished notification */
2963 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2965 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2967 /* Restart STA timers */
2969 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2970 ieee80211_restart_sta_timer(sdata);
2974 int ieee80211_max_network_latency(struct notifier_block *nb,
2975 unsigned long data, void *dummy)
2977 s32 latency_usec = (s32) data;
2978 struct ieee80211_local *local =
2979 container_of(nb, struct ieee80211_local,
2980 network_latency_notifier);
2982 mutex_lock(&local->iflist_mtx);
2983 ieee80211_recalc_ps(local, latency_usec);
2984 mutex_unlock(&local->iflist_mtx);
2989 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
2990 struct cfg80211_bss *cbss, bool assoc)
2992 struct ieee80211_local *local = sdata->local;
2993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2994 struct ieee80211_bss *bss = (void *)cbss->priv;
2995 struct sta_info *sta = NULL;
2996 bool have_sta = false;
2999 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3000 const u8 *ht_oper_ie;
3001 const struct ieee80211_ht_operation *ht_oper = NULL;
3002 struct ieee80211_supported_band *sband;
3004 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3009 have_sta = sta_info_get(sdata, cbss->bssid);
3014 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3019 mutex_lock(&local->mtx);
3020 ieee80211_recalc_idle(sdata->local);
3021 mutex_unlock(&local->mtx);
3023 /* switch to the right channel */
3024 sband = local->hw.wiphy->bands[cbss->channel->band];
3026 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3028 if (sband->ht_cap.ht_supported) {
3029 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3030 cbss->information_elements,
3031 cbss->len_information_elements);
3032 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3033 ht_oper = (void *)(ht_oper_ie + 2);
3037 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3038 cbss->channel->band);
3039 /* check that channel matches the right operating channel */
3040 if (cbss->channel->center_freq != ht_cfreq) {
3042 * It's possible that some APs are confused here;
3043 * Netgear WNDR3700 sometimes reports 4 higher than
3044 * the actual channel in association responses, but
3045 * since we look at probe response/beacon data here
3049 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3050 cbss->channel->center_freq,
3051 ht_cfreq, ht_oper->primary_chan,
3052 cbss->channel->band);
3058 channel_type = NL80211_CHAN_HT20;
3060 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3061 switch (ht_oper->ht_param &
3062 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3063 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3064 channel_type = NL80211_CHAN_HT40PLUS;
3066 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3067 channel_type = NL80211_CHAN_HT40MINUS;
3073 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3074 /* can only fail due to HT40+/- mismatch */
3075 channel_type = NL80211_CHAN_HT20;
3077 "disabling 40 MHz due to multi-vif mismatch\n");
3078 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3079 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3083 local->oper_channel = cbss->channel;
3084 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3087 u32 rates = 0, basic_rates = 0;
3088 bool have_higher_than_11mbit;
3089 int min_rate = INT_MAX, min_rate_index = -1;
3091 ieee80211_get_rates(sband, bss->supp_rates,
3092 bss->supp_rates_len,
3093 &rates, &basic_rates,
3094 &have_higher_than_11mbit,
3095 &min_rate, &min_rate_index);
3098 * This used to be a workaround for basic rates missing
3099 * in the association response frame. Now that we no
3100 * longer use the basic rates from there, it probably
3101 * doesn't happen any more, but keep the workaround so
3102 * in case some *other* APs are buggy in different ways
3103 * we can connect -- with a warning.
3105 if (!basic_rates && min_rate_index >= 0) {
3107 "No basic rates, using min rate instead\n");
3108 basic_rates = BIT(min_rate_index);
3111 sta->sta.supp_rates[cbss->channel->band] = rates;
3112 sdata->vif.bss_conf.basic_rates = basic_rates;
3114 /* cf. IEEE 802.11 9.2.12 */
3115 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3116 have_higher_than_11mbit)
3117 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3119 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3121 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3123 /* tell driver about BSSID and basic rates */
3124 ieee80211_bss_info_change_notify(sdata,
3125 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
3128 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3130 err = sta_info_insert(sta);
3134 "failed to insert STA entry for the AP (error %d)\n",
3139 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3145 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3146 struct cfg80211_auth_request *req)
3148 struct ieee80211_local *local = sdata->local;
3149 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3150 struct ieee80211_mgd_auth_data *auth_data;
3154 /* prepare auth data structure */
3156 switch (req->auth_type) {
3157 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3158 auth_alg = WLAN_AUTH_OPEN;
3160 case NL80211_AUTHTYPE_SHARED_KEY:
3161 if (IS_ERR(local->wep_tx_tfm))
3163 auth_alg = WLAN_AUTH_SHARED_KEY;
3165 case NL80211_AUTHTYPE_FT:
3166 auth_alg = WLAN_AUTH_FT;
3168 case NL80211_AUTHTYPE_NETWORK_EAP:
3169 auth_alg = WLAN_AUTH_LEAP;
3175 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3179 auth_data->bss = req->bss;
3181 if (req->ie && req->ie_len) {
3182 memcpy(auth_data->ie, req->ie, req->ie_len);
3183 auth_data->ie_len = req->ie_len;
3186 if (req->key && req->key_len) {
3187 auth_data->key_len = req->key_len;
3188 auth_data->key_idx = req->key_idx;
3189 memcpy(auth_data->key, req->key, req->key_len);
3192 auth_data->algorithm = auth_alg;
3194 /* try to authenticate/probe */
3196 mutex_lock(&ifmgd->mtx);
3198 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3199 ifmgd->assoc_data) {
3204 if (ifmgd->auth_data)
3205 ieee80211_destroy_auth_data(sdata, false);
3207 /* prep auth_data so we don't go into idle on disassoc */
3208 ifmgd->auth_data = auth_data;
3210 if (ifmgd->associated)
3211 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3213 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
3215 err = ieee80211_prep_connection(sdata, req->bss, false);
3219 err = ieee80211_probe_auth(sdata);
3221 sta_info_destroy_addr(sdata, req->bss->bssid);
3225 /* hold our own reference */
3226 cfg80211_ref_bss(auth_data->bss);
3231 ifmgd->auth_data = NULL;
3235 mutex_unlock(&ifmgd->mtx);
3240 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3241 struct cfg80211_assoc_request *req)
3243 struct ieee80211_local *local = sdata->local;
3244 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3245 struct ieee80211_bss *bss = (void *)req->bss->priv;
3246 struct ieee80211_mgd_assoc_data *assoc_data;
3247 struct ieee80211_supported_band *sband;
3248 const u8 *ssidie, *ht_ie;
3251 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3255 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3259 mutex_lock(&ifmgd->mtx);
3261 if (ifmgd->associated)
3262 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3264 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3269 if (ifmgd->assoc_data) {
3274 if (ifmgd->auth_data) {
3277 /* keep sta info, bssid if matching */
3278 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3279 ieee80211_destroy_auth_data(sdata, match);
3282 /* prepare assoc data */
3284 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
3285 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
3287 ifmgd->beacon_crc_valid = false;
3290 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3291 * We still associate in non-HT mode (11a/b/g) if any one of these
3292 * ciphers is configured as pairwise.
3293 * We can set this to true for non-11n hardware, that'll be checked
3294 * separately along with the peer capabilities.
3296 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
3297 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3298 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3299 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
3300 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3301 netdev_info(sdata->dev,
3302 "disabling HT due to WEP/TKIP use\n");
3306 if (req->flags & ASSOC_REQ_DISABLE_HT)
3307 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3309 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3310 sband = local->hw.wiphy->bands[req->bss->channel->band];
3311 if (!sband->ht_cap.ht_supported ||
3312 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3313 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3314 netdev_info(sdata->dev,
3315 "disabling HT as WMM/QoS is not supported\n");
3318 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3319 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3320 sizeof(ifmgd->ht_capa_mask));
3322 if (req->ie && req->ie_len) {
3323 memcpy(assoc_data->ie, req->ie, req->ie_len);
3324 assoc_data->ie_len = req->ie_len;
3327 assoc_data->bss = req->bss;
3329 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3330 if (ifmgd->powersave)
3331 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3333 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3335 ifmgd->ap_smps = ifmgd->req_smps;
3337 assoc_data->capability = req->bss->capability;
3338 assoc_data->wmm = bss->wmm_used &&
3339 (local->hw.queues >= IEEE80211_NUM_ACS);
3340 assoc_data->supp_rates = bss->supp_rates;
3341 assoc_data->supp_rates_len = bss->supp_rates_len;
3343 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3344 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3345 assoc_data->ap_ht_param =
3346 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3348 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3350 if (bss->wmm_used && bss->uapsd_supported &&
3351 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3352 assoc_data->uapsd = true;
3353 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3355 assoc_data->uapsd = false;
3356 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3359 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3360 assoc_data->ssid_len = ssidie[1];
3362 if (req->prev_bssid)
3363 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3366 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3367 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3369 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3370 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3373 if (req->crypto.control_port)
3374 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3376 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3378 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3379 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3381 /* kick off associate process */
3383 ifmgd->assoc_data = assoc_data;
3385 err = ieee80211_prep_connection(sdata, req->bss, true);
3389 if (!bss->dtim_period &&
3390 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3392 * Wait up to one beacon interval ...
3393 * should this be more if we miss one?
3395 sdata_info(sdata, "waiting for beacon from %pM\n",
3397 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
3399 assoc_data->have_beacon = true;
3400 assoc_data->sent_assoc = false;
3401 assoc_data->timeout = jiffies;
3403 run_again(ifmgd, assoc_data->timeout);
3405 if (bss->corrupt_data) {
3406 char *corrupt_type = "data";
3407 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3408 if (bss->corrupt_data &
3409 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3410 corrupt_type = "beacon and probe response";
3412 corrupt_type = "beacon";
3413 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3414 corrupt_type = "probe response";
3415 sdata_info(sdata, "associating with AP with corrupt %s\n",
3422 ifmgd->assoc_data = NULL;
3426 mutex_unlock(&ifmgd->mtx);
3431 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
3432 struct cfg80211_deauth_request *req)
3434 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3435 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3437 mutex_lock(&ifmgd->mtx);
3439 if (ifmgd->auth_data) {
3440 ieee80211_destroy_auth_data(sdata, false);
3441 mutex_unlock(&ifmgd->mtx);
3446 "deauthenticating from %pM by local choice (reason=%d)\n",
3447 req->bssid, req->reason_code);
3449 if (ifmgd->associated &&
3450 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
3451 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3452 req->reason_code, true, frame_buf);
3454 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3455 IEEE80211_STYPE_DEAUTH,
3456 req->reason_code, true,
3458 mutex_unlock(&ifmgd->mtx);
3460 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3462 mutex_lock(&sdata->local->mtx);
3463 ieee80211_recalc_idle(sdata->local);
3464 mutex_unlock(&sdata->local->mtx);
3469 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
3470 struct cfg80211_disassoc_request *req)
3472 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3474 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3476 mutex_lock(&ifmgd->mtx);
3479 * cfg80211 should catch this ... but it's racy since
3480 * we can receive a disassoc frame, process it, hand it
3481 * to cfg80211 while that's in a locked section already
3482 * trying to tell us that the user wants to disconnect.
3484 if (ifmgd->associated != req->bss) {
3485 mutex_unlock(&ifmgd->mtx);
3490 "disassociating from %pM by local choice (reason=%d)\n",
3491 req->bss->bssid, req->reason_code);
3493 memcpy(bssid, req->bss->bssid, ETH_ALEN);
3494 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3495 req->reason_code, !req->local_state_change,
3497 mutex_unlock(&ifmgd->mtx);
3499 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3501 mutex_lock(&sdata->local->mtx);
3502 ieee80211_recalc_idle(sdata->local);
3503 mutex_unlock(&sdata->local->mtx);
3508 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
3510 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3512 mutex_lock(&ifmgd->mtx);
3513 if (ifmgd->assoc_data)
3514 ieee80211_destroy_assoc_data(sdata, false);
3515 if (ifmgd->auth_data)
3516 ieee80211_destroy_auth_data(sdata, false);
3517 del_timer_sync(&ifmgd->timer);
3518 mutex_unlock(&ifmgd->mtx);
3521 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3522 enum nl80211_cqm_rssi_threshold_event rssi_event,
3525 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3527 trace_api_cqm_rssi_notify(sdata, rssi_event);
3529 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3531 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);