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->associated->beacon_ies)
908 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
909 IEEE80211_STA_CONNECTION_POLL))
913 sta = sta_info_get(sdata, mgd->bssid);
915 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
921 /* need to hold RTNL or interface lock */
922 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
924 struct ieee80211_sub_if_data *sdata, *found = NULL;
928 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
929 local->ps_sdata = NULL;
933 list_for_each_entry(sdata, &local->interfaces, list) {
934 if (!ieee80211_sdata_running(sdata))
936 if (sdata->vif.type == NL80211_IFTYPE_AP) {
937 /* If an AP vif is found, then disable PS
938 * by setting the count to zero thereby setting
944 if (sdata->vif.type != NL80211_IFTYPE_STATION)
950 if (count == 1 && ieee80211_powersave_allowed(found)) {
951 struct ieee80211_conf *conf = &local->hw.conf;
955 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
957 beaconint_us = ieee80211_tu_to_usec(
958 found->vif.bss_conf.beacon_int);
960 timeout = local->dynamic_ps_forced_timeout;
963 * Go to full PSM if the user configures a very low
964 * latency requirement.
965 * The 2000 second value is there for compatibility
966 * until the PM_QOS_NETWORK_LATENCY is configured
969 if (latency > (1900 * USEC_PER_MSEC) &&
970 latency != (2000 * USEC_PER_SEC))
975 local->dynamic_ps_user_timeout = timeout;
976 if (!local->disable_dynamic_ps)
977 conf->dynamic_ps_timeout =
978 local->dynamic_ps_user_timeout;
980 if (beaconint_us > latency) {
981 local->ps_sdata = NULL;
983 struct ieee80211_bss *bss;
987 bss = (void *)found->u.mgd.associated->priv;
988 dtimper = bss->dtim_period;
990 /* If the TIM IE is invalid, pretend the value is 1 */
993 else if (dtimper > 1)
994 maxslp = min_t(int, dtimper,
995 latency / beaconint_us);
997 local->hw.conf.max_sleep_period = maxslp;
998 local->hw.conf.ps_dtim_period = dtimper;
999 local->ps_sdata = found;
1002 local->ps_sdata = NULL;
1005 ieee80211_change_ps(local);
1008 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1010 struct ieee80211_local *local =
1011 container_of(work, struct ieee80211_local,
1012 dynamic_ps_disable_work);
1014 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1015 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1016 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1019 ieee80211_wake_queues_by_reason(&local->hw,
1020 IEEE80211_QUEUE_STOP_REASON_PS);
1023 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1025 struct ieee80211_local *local =
1026 container_of(work, struct ieee80211_local,
1027 dynamic_ps_enable_work);
1028 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1029 struct ieee80211_if_managed *ifmgd;
1030 unsigned long flags;
1033 /* can only happen when PS was just disabled anyway */
1037 ifmgd = &sdata->u.mgd;
1039 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1042 if (!local->disable_dynamic_ps &&
1043 local->hw.conf.dynamic_ps_timeout > 0) {
1044 /* don't enter PS if TX frames are pending */
1045 if (drv_tx_frames_pending(local)) {
1046 mod_timer(&local->dynamic_ps_timer, jiffies +
1048 local->hw.conf.dynamic_ps_timeout));
1053 * transmission can be stopped by others which leads to
1054 * dynamic_ps_timer expiry. Postpone the ps timer if it
1055 * is not the actual idle state.
1057 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1058 for (q = 0; q < local->hw.queues; q++) {
1059 if (local->queue_stop_reasons[q]) {
1060 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1062 mod_timer(&local->dynamic_ps_timer, jiffies +
1064 local->hw.conf.dynamic_ps_timeout));
1068 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1071 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1072 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1073 netif_tx_stop_all_queues(sdata->dev);
1075 if (drv_tx_frames_pending(local))
1076 mod_timer(&local->dynamic_ps_timer, jiffies +
1078 local->hw.conf.dynamic_ps_timeout));
1080 ieee80211_send_nullfunc(local, sdata, 1);
1081 /* Flush to get the tx status of nullfunc frame */
1082 drv_flush(local, false);
1086 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1087 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1088 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1089 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1090 local->hw.conf.flags |= IEEE80211_CONF_PS;
1091 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1094 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1095 netif_tx_wake_all_queues(sdata->dev);
1098 void ieee80211_dynamic_ps_timer(unsigned long data)
1100 struct ieee80211_local *local = (void *) data;
1102 if (local->quiescing || local->suspended)
1105 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1109 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
1110 struct ieee80211_sub_if_data *sdata,
1111 u8 *wmm_param, size_t wmm_param_len)
1113 struct ieee80211_tx_queue_params params;
1114 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1117 u8 *pos, uapsd_queues = 0;
1119 if (!local->ops->conf_tx)
1122 if (local->hw.queues < IEEE80211_NUM_ACS)
1128 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1131 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1132 uapsd_queues = ifmgd->uapsd_queues;
1134 count = wmm_param[6] & 0x0f;
1135 if (count == ifmgd->wmm_last_param_set)
1137 ifmgd->wmm_last_param_set = count;
1139 pos = wmm_param + 8;
1140 left = wmm_param_len - 8;
1142 memset(¶ms, 0, sizeof(params));
1145 for (; left >= 4; left -= 4, pos += 4) {
1146 int aci = (pos[0] >> 5) & 0x03;
1147 int acm = (pos[0] >> 4) & 0x01;
1155 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1156 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1162 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1163 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1169 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1170 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1177 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1178 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1183 params.aifs = pos[0] & 0x0f;
1184 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1185 params.cw_min = ecw2cw(pos[1] & 0x0f);
1186 params.txop = get_unaligned_le16(pos + 2);
1187 params.uapsd = uapsd;
1189 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1190 wiphy_debug(local->hw.wiphy,
1191 "WMM queue=%d aci=%d acm=%d aifs=%d "
1192 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1194 params.aifs, params.cw_min, params.cw_max,
1195 params.txop, params.uapsd);
1197 sdata->tx_conf[queue] = params;
1198 if (drv_conf_tx(local, sdata, queue, ¶ms))
1199 wiphy_debug(local->hw.wiphy,
1200 "failed to set TX queue parameters for queue %d\n",
1204 /* enable WMM or activate new settings */
1205 sdata->vif.bss_conf.qos = true;
1208 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1210 lockdep_assert_held(&sdata->local->mtx);
1212 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1213 IEEE80211_STA_BEACON_POLL);
1214 ieee80211_run_deferred_scan(sdata->local);
1217 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1219 mutex_lock(&sdata->local->mtx);
1220 __ieee80211_stop_poll(sdata);
1221 mutex_unlock(&sdata->local->mtx);
1224 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1225 u16 capab, bool erp_valid, u8 erp)
1227 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1229 bool use_protection;
1230 bool use_short_preamble;
1231 bool use_short_slot;
1234 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1235 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1237 use_protection = false;
1238 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1241 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1242 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1243 use_short_slot = true;
1245 if (use_protection != bss_conf->use_cts_prot) {
1246 bss_conf->use_cts_prot = use_protection;
1247 changed |= BSS_CHANGED_ERP_CTS_PROT;
1250 if (use_short_preamble != bss_conf->use_short_preamble) {
1251 bss_conf->use_short_preamble = use_short_preamble;
1252 changed |= BSS_CHANGED_ERP_PREAMBLE;
1255 if (use_short_slot != bss_conf->use_short_slot) {
1256 bss_conf->use_short_slot = use_short_slot;
1257 changed |= BSS_CHANGED_ERP_SLOT;
1263 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1264 struct cfg80211_bss *cbss,
1265 u32 bss_info_changed)
1267 struct ieee80211_bss *bss = (void *)cbss->priv;
1268 struct ieee80211_local *local = sdata->local;
1269 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1271 bss_info_changed |= BSS_CHANGED_ASSOC;
1272 /* set timing information */
1273 bss_conf->beacon_int = cbss->beacon_interval;
1274 bss_conf->last_tsf = cbss->tsf;
1276 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1277 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1278 cbss->capability, bss->has_erp_value, bss->erp_value);
1280 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1281 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1283 sdata->u.mgd.associated = cbss;
1284 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1286 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1288 /* just to be sure */
1289 ieee80211_stop_poll(sdata);
1291 ieee80211_led_assoc(local, 1);
1293 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1294 bss_conf->dtim_period = bss->dtim_period;
1296 bss_conf->dtim_period = 0;
1298 bss_conf->assoc = 1;
1300 /* Tell the driver to monitor connection quality (if supported) */
1301 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1302 bss_conf->cqm_rssi_thold)
1303 bss_info_changed |= BSS_CHANGED_CQM;
1305 /* Enable ARP filtering */
1306 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1307 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1308 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1311 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1313 mutex_lock(&local->iflist_mtx);
1314 ieee80211_recalc_ps(local, -1);
1315 ieee80211_recalc_smps(local);
1316 mutex_unlock(&local->iflist_mtx);
1318 netif_tx_start_all_queues(sdata->dev);
1319 netif_carrier_on(sdata->dev);
1322 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1323 u16 stype, u16 reason, bool tx,
1326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1327 struct ieee80211_local *local = sdata->local;
1328 struct sta_info *sta;
1332 ASSERT_MGD_MTX(ifmgd);
1334 if (WARN_ON_ONCE(tx && !frame_buf))
1337 if (WARN_ON(!ifmgd->associated))
1340 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1342 ifmgd->associated = NULL;
1343 memset(ifmgd->bssid, 0, ETH_ALEN);
1346 * we need to commit the associated = NULL change because the
1347 * scan code uses that to determine whether this iface should
1348 * go to/wake up from powersave or not -- and could otherwise
1349 * wake the queues erroneously.
1354 * Thus, we can only afterwards stop the queues -- to account
1355 * for the case where another CPU is finishing a scan at this
1356 * time -- we don't want the scan code to enable queues.
1359 netif_tx_stop_all_queues(sdata->dev);
1360 netif_carrier_off(sdata->dev);
1362 mutex_lock(&local->sta_mtx);
1363 sta = sta_info_get(sdata, bssid);
1365 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1366 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1368 mutex_unlock(&local->sta_mtx);
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);
1568 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1570 net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
1573 ieee80211_cqm_rssi_notify(&sdata->vif,
1574 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
1577 * The driver/our work has already reported this event or the
1578 * connection monitoring has kicked in and we have already sent
1579 * a probe request. Or maybe the AP died and the driver keeps
1580 * reporting until we disassociate...
1582 * In either case we have to ignore the current call to this
1583 * function (except for setting the correct probe reason bit)
1584 * because otherwise we would reset the timer every time and
1585 * never check whether we received a probe response!
1587 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1588 IEEE80211_STA_CONNECTION_POLL))
1592 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1594 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1596 mutex_unlock(&sdata->local->mtx);
1601 mutex_lock(&sdata->local->iflist_mtx);
1602 ieee80211_recalc_ps(sdata->local, -1);
1603 mutex_unlock(&sdata->local->iflist_mtx);
1605 ifmgd->probe_send_count = 0;
1606 ieee80211_mgd_probe_ap_send(sdata);
1608 mutex_unlock(&ifmgd->mtx);
1611 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1612 struct ieee80211_vif *vif)
1614 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1615 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1616 struct sk_buff *skb;
1620 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1623 ASSERT_MGD_MTX(ifmgd);
1625 if (!ifmgd->associated)
1628 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1629 if (WARN_ON_ONCE(ssid == NULL))
1634 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1635 (u32) -1, ssid + 2, ssid_len,
1640 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1642 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1644 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1645 struct ieee80211_local *local = sdata->local;
1647 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1649 mutex_lock(&ifmgd->mtx);
1650 if (!ifmgd->associated) {
1651 mutex_unlock(&ifmgd->mtx);
1655 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1657 pr_debug("%s: Connection to AP %pM lost\n", sdata->name, bssid);
1659 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1660 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1662 mutex_unlock(&ifmgd->mtx);
1665 * must be outside lock due to cfg80211,
1666 * but that's not a problem.
1668 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
1670 mutex_lock(&local->mtx);
1671 ieee80211_recalc_idle(local);
1672 mutex_unlock(&local->mtx);
1675 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1677 struct ieee80211_sub_if_data *sdata =
1678 container_of(work, struct ieee80211_sub_if_data,
1679 u.mgd.beacon_connection_loss_work);
1680 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1681 struct sta_info *sta;
1683 if (ifmgd->associated) {
1685 sta = sta_info_get(sdata, ifmgd->bssid);
1687 sta->beacon_loss_count++;
1691 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1692 __ieee80211_connection_loss(sdata);
1694 ieee80211_mgd_probe_ap(sdata, true);
1697 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1699 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1700 struct ieee80211_hw *hw = &sdata->local->hw;
1702 trace_api_beacon_loss(sdata);
1704 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1705 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1707 EXPORT_SYMBOL(ieee80211_beacon_loss);
1709 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1711 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1712 struct ieee80211_hw *hw = &sdata->local->hw;
1714 trace_api_connection_loss(sdata);
1716 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1717 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1719 EXPORT_SYMBOL(ieee80211_connection_loss);
1722 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1725 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1727 lockdep_assert_held(&sdata->u.mgd.mtx);
1730 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1732 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1733 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1736 cfg80211_put_bss(auth_data->bss);
1738 sdata->u.mgd.auth_data = NULL;
1741 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1742 struct ieee80211_mgmt *mgmt, size_t len)
1744 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1746 struct ieee802_11_elems elems;
1748 pos = mgmt->u.auth.variable;
1749 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1750 if (!elems.challenge)
1752 auth_data->expected_transaction = 4;
1753 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1754 elems.challenge - 2, elems.challenge_len + 2,
1755 auth_data->bss->bssid, auth_data->bss->bssid,
1756 auth_data->key, auth_data->key_len,
1757 auth_data->key_idx);
1760 static enum rx_mgmt_action __must_check
1761 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1762 struct ieee80211_mgmt *mgmt, size_t len)
1764 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1766 u16 auth_alg, auth_transaction, status_code;
1767 struct sta_info *sta;
1769 lockdep_assert_held(&ifmgd->mtx);
1772 return RX_MGMT_NONE;
1774 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1775 return RX_MGMT_NONE;
1777 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1779 if (!ether_addr_equal(bssid, mgmt->bssid))
1780 return RX_MGMT_NONE;
1782 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1783 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1784 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1786 if (auth_alg != ifmgd->auth_data->algorithm ||
1787 auth_transaction != ifmgd->auth_data->expected_transaction)
1788 return RX_MGMT_NONE;
1790 if (status_code != WLAN_STATUS_SUCCESS) {
1791 pr_debug("%s: %pM denied authentication (status %d)\n",
1792 sdata->name, mgmt->sa, status_code);
1793 ieee80211_destroy_auth_data(sdata, false);
1794 return RX_MGMT_CFG80211_RX_AUTH;
1797 switch (ifmgd->auth_data->algorithm) {
1798 case WLAN_AUTH_OPEN:
1799 case WLAN_AUTH_LEAP:
1802 case WLAN_AUTH_SHARED_KEY:
1803 if (ifmgd->auth_data->expected_transaction != 4) {
1804 ieee80211_auth_challenge(sdata, mgmt, len);
1805 /* need another frame */
1806 return RX_MGMT_NONE;
1810 WARN_ONCE(1, "invalid auth alg %d",
1811 ifmgd->auth_data->algorithm);
1812 return RX_MGMT_NONE;
1815 pr_debug("%s: authenticated\n", sdata->name);
1816 ifmgd->auth_data->done = true;
1817 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1818 run_again(ifmgd, ifmgd->auth_data->timeout);
1820 /* move station state to auth */
1821 mutex_lock(&sdata->local->sta_mtx);
1822 sta = sta_info_get(sdata, bssid);
1824 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1827 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1828 pr_debug("%s: failed moving %pM to auth\n", sdata->name, bssid);
1831 mutex_unlock(&sdata->local->sta_mtx);
1833 return RX_MGMT_CFG80211_RX_AUTH;
1835 mutex_unlock(&sdata->local->sta_mtx);
1836 /* ignore frame -- wait for timeout */
1837 return RX_MGMT_NONE;
1841 static enum rx_mgmt_action __must_check
1842 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1843 struct ieee80211_mgmt *mgmt, size_t len)
1845 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1846 const u8 *bssid = NULL;
1849 lockdep_assert_held(&ifmgd->mtx);
1852 return RX_MGMT_NONE;
1854 if (!ifmgd->associated ||
1855 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1856 return RX_MGMT_NONE;
1858 bssid = ifmgd->associated->bssid;
1860 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1862 pr_debug("%s: deauthenticated from %pM (Reason: %u)\n",
1863 sdata->name, bssid, reason_code);
1865 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1867 mutex_lock(&sdata->local->mtx);
1868 ieee80211_recalc_idle(sdata->local);
1869 mutex_unlock(&sdata->local->mtx);
1871 return RX_MGMT_CFG80211_DEAUTH;
1875 static enum rx_mgmt_action __must_check
1876 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1877 struct ieee80211_mgmt *mgmt, size_t len)
1879 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1882 lockdep_assert_held(&ifmgd->mtx);
1885 return RX_MGMT_NONE;
1887 if (!ifmgd->associated ||
1888 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1889 return RX_MGMT_NONE;
1891 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1893 pr_debug("%s: disassociated from %pM (Reason: %u)\n",
1894 sdata->name, mgmt->sa, reason_code);
1896 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1898 mutex_lock(&sdata->local->mtx);
1899 ieee80211_recalc_idle(sdata->local);
1900 mutex_unlock(&sdata->local->mtx);
1902 return RX_MGMT_CFG80211_DISASSOC;
1905 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1906 u8 *supp_rates, unsigned int supp_rates_len,
1907 u32 *rates, u32 *basic_rates,
1908 bool *have_higher_than_11mbit,
1909 int *min_rate, int *min_rate_index)
1913 for (i = 0; i < supp_rates_len; i++) {
1914 int rate = (supp_rates[i] & 0x7f) * 5;
1915 bool is_basic = !!(supp_rates[i] & 0x80);
1918 *have_higher_than_11mbit = true;
1921 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1922 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1924 * Note: Even through the membership selector and the basic
1925 * rate flag share the same bit, they are not exactly
1928 if (!!(supp_rates[i] & 0x80) &&
1929 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1932 for (j = 0; j < sband->n_bitrates; j++) {
1933 if (sband->bitrates[j].bitrate == rate) {
1936 *basic_rates |= BIT(j);
1937 if (rate < *min_rate) {
1939 *min_rate_index = j;
1947 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1950 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1952 lockdep_assert_held(&sdata->u.mgd.mtx);
1955 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1957 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1958 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1962 sdata->u.mgd.assoc_data = NULL;
1965 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1966 struct cfg80211_bss *cbss,
1967 struct ieee80211_mgmt *mgmt, size_t len)
1969 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1970 struct ieee80211_local *local = sdata->local;
1971 struct ieee80211_supported_band *sband;
1972 struct sta_info *sta;
1974 u16 capab_info, aid;
1975 struct ieee802_11_elems elems;
1976 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1980 /* AssocResp and ReassocResp have identical structure */
1982 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1983 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1985 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1986 pr_debug("%s: invalid AID value 0x%x; bits 15:14 not set\n",
1988 aid &= ~(BIT(15) | BIT(14));
1990 ifmgd->broken_ap = false;
1992 if (aid == 0 || aid > IEEE80211_MAX_AID) {
1993 pr_debug("%s: invalid AID value %d (out of range), turn off PS\n",
1996 ifmgd->broken_ap = true;
1999 pos = mgmt->u.assoc_resp.variable;
2000 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2002 if (!elems.supp_rates) {
2003 pr_debug("%s: no SuppRates element in AssocResp\n",
2010 mutex_lock(&sdata->local->sta_mtx);
2012 * station info was already allocated and inserted before
2013 * the association and should be available to us
2015 sta = sta_info_get(sdata, cbss->bssid);
2016 if (WARN_ON(!sta)) {
2017 mutex_unlock(&sdata->local->sta_mtx);
2021 sband = local->hw.wiphy->bands[local->oper_channel->band];
2023 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2024 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2025 elems.ht_cap_elem, &sta->sta.ht_cap);
2027 sta->supports_40mhz =
2028 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2030 rate_control_rate_init(sta);
2032 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2033 set_sta_flag(sta, WLAN_STA_MFP);
2035 if (elems.wmm_param)
2036 set_sta_flag(sta, WLAN_STA_WME);
2038 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2040 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2041 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2042 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2044 pr_debug("%s: failed to move station %pM to desired state\n",
2045 sdata->name, sta->sta.addr);
2046 WARN_ON(__sta_info_destroy(sta));
2047 mutex_unlock(&sdata->local->sta_mtx);
2051 mutex_unlock(&sdata->local->sta_mtx);
2054 * Always handle WMM once after association regardless
2055 * of the first value the AP uses. Setting -1 here has
2056 * that effect because the AP values is an unsigned
2059 ifmgd->wmm_last_param_set = -1;
2061 if (elems.wmm_param)
2062 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2063 elems.wmm_param_len);
2065 ieee80211_set_wmm_default(sdata, false);
2066 changed |= BSS_CHANGED_QOS;
2068 if (elems.ht_operation && elems.wmm_param &&
2069 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2070 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2071 cbss->bssid, false);
2073 /* set AID and assoc capability,
2074 * ieee80211_set_associated() will tell the driver */
2075 bss_conf->aid = aid;
2076 bss_conf->assoc_capability = capab_info;
2077 ieee80211_set_associated(sdata, cbss, changed);
2080 * If we're using 4-addr mode, let the AP know that we're
2081 * doing so, so that it can create the STA VLAN on its side
2083 if (ifmgd->use_4addr)
2084 ieee80211_send_4addr_nullfunc(local, sdata);
2087 * Start timer to probe the connection to the AP now.
2088 * Also start the timer that will detect beacon loss.
2090 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2091 ieee80211_sta_reset_beacon_monitor(sdata);
2096 static enum rx_mgmt_action __must_check
2097 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2098 struct ieee80211_mgmt *mgmt, size_t len,
2099 struct cfg80211_bss **bss)
2101 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2102 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2103 u16 capab_info, status_code, aid;
2104 struct ieee802_11_elems elems;
2108 lockdep_assert_held(&ifmgd->mtx);
2111 return RX_MGMT_NONE;
2112 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2113 return RX_MGMT_NONE;
2116 * AssocResp and ReassocResp have identical structure, so process both
2117 * of them in this function.
2121 return RX_MGMT_NONE;
2123 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2124 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2125 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2126 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2128 pr_debug("%s: RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2129 sdata->name, 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;
2141 pr_debug("%s: %pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2142 sdata->name, mgmt->sa, tu, ms);
2143 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2144 if (ms > IEEE80211_ASSOC_TIMEOUT)
2145 run_again(ifmgd, assoc_data->timeout);
2146 return RX_MGMT_NONE;
2149 *bss = assoc_data->bss;
2151 if (status_code != WLAN_STATUS_SUCCESS) {
2152 pr_debug("%s: %pM denied association (code=%d)\n",
2153 sdata->name, mgmt->sa, status_code);
2154 ieee80211_destroy_assoc_data(sdata, false);
2156 pr_debug("%s: associated\n", sdata->name);
2158 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2159 /* oops -- internal error -- send timeout for now */
2160 ieee80211_destroy_assoc_data(sdata, true);
2161 sta_info_destroy_addr(sdata, mgmt->bssid);
2162 cfg80211_put_bss(*bss);
2163 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2167 * destroy assoc_data afterwards, as otherwise an idle
2168 * recalc after assoc_data is NULL but before associated
2169 * is set can cause the interface to go idle
2171 ieee80211_destroy_assoc_data(sdata, true);
2174 return RX_MGMT_CFG80211_RX_ASSOC;
2176 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2177 struct ieee80211_mgmt *mgmt,
2179 struct ieee80211_rx_status *rx_status,
2180 struct ieee802_11_elems *elems,
2183 struct ieee80211_local *local = sdata->local;
2185 struct ieee80211_bss *bss;
2186 struct ieee80211_channel *channel;
2187 bool need_ps = false;
2189 if (sdata->u.mgd.associated &&
2190 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
2191 bss = (void *)sdata->u.mgd.associated->priv;
2192 /* not previously set so we may need to recalc */
2193 need_ps = !bss->dtim_period;
2196 if (elems->ds_params && elems->ds_params_len == 1)
2197 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2200 freq = rx_status->freq;
2202 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2204 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2207 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2210 ieee80211_rx_bss_put(local, bss);
2212 if (!sdata->u.mgd.associated)
2216 mutex_lock(&local->iflist_mtx);
2217 ieee80211_recalc_ps(local, -1);
2218 mutex_unlock(&local->iflist_mtx);
2221 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
2222 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
2224 struct ieee80211_channel_sw_ie *sw_elem =
2225 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
2226 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2227 bss, rx_status->mactime);
2232 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2233 struct sk_buff *skb)
2235 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2236 struct ieee80211_if_managed *ifmgd;
2237 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2238 size_t baselen, len = skb->len;
2239 struct ieee802_11_elems elems;
2241 ifmgd = &sdata->u.mgd;
2243 ASSERT_MGD_MTX(ifmgd);
2245 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2246 return; /* ignore ProbeResp to foreign address */
2248 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2252 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2255 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2257 if (ifmgd->associated &&
2258 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2259 ieee80211_reset_ap_probe(sdata);
2261 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2262 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2263 /* got probe response, continue with auth */
2264 pr_debug("%s: direct probe responded\n", sdata->name);
2265 ifmgd->auth_data->tries = 0;
2266 ifmgd->auth_data->timeout = jiffies;
2267 run_again(ifmgd, ifmgd->auth_data->timeout);
2272 * This is the canonical list of information elements we care about,
2273 * the filter code also gives us all changes to the Microsoft OUI
2274 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2276 * We implement beacon filtering in software since that means we can
2277 * avoid processing the frame here and in cfg80211, and userspace
2278 * will not be able to tell whether the hardware supports it or not.
2280 * XXX: This list needs to be dynamic -- userspace needs to be able to
2281 * add items it requires. It also needs to be able to tell us to
2282 * look out for other vendor IEs.
2284 static const u64 care_about_ies =
2285 (1ULL << WLAN_EID_COUNTRY) |
2286 (1ULL << WLAN_EID_ERP_INFO) |
2287 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2288 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2289 (1ULL << WLAN_EID_HT_CAPABILITY) |
2290 (1ULL << WLAN_EID_HT_OPERATION);
2292 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2293 struct ieee80211_mgmt *mgmt,
2295 struct ieee80211_rx_status *rx_status)
2297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2298 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2300 struct ieee802_11_elems elems;
2301 struct ieee80211_local *local = sdata->local;
2303 bool erp_valid, directed_tim = false;
2308 lockdep_assert_held(&ifmgd->mtx);
2310 /* Process beacon from the current BSS */
2311 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2315 if (rx_status->freq != local->hw.conf.channel->center_freq)
2318 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2319 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2320 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2321 len - baselen, &elems);
2323 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2325 ifmgd->assoc_data->have_beacon = true;
2326 ifmgd->assoc_data->sent_assoc = false;
2327 /* continue assoc process */
2328 ifmgd->assoc_data->timeout = jiffies;
2329 run_again(ifmgd, ifmgd->assoc_data->timeout);
2333 if (!ifmgd->associated ||
2334 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2336 bssid = ifmgd->associated->bssid;
2338 /* Track average RSSI from the Beacon frames of the current AP */
2339 ifmgd->last_beacon_signal = rx_status->signal;
2340 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2341 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2342 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2343 ifmgd->last_cqm_event_signal = 0;
2344 ifmgd->count_beacon_signal = 1;
2345 ifmgd->last_ave_beacon_signal = 0;
2347 ifmgd->ave_beacon_signal =
2348 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2349 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2350 ifmgd->ave_beacon_signal) / 16;
2351 ifmgd->count_beacon_signal++;
2354 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2355 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2356 int sig = ifmgd->ave_beacon_signal;
2357 int last_sig = ifmgd->last_ave_beacon_signal;
2360 * if signal crosses either of the boundaries, invoke callback
2361 * with appropriate parameters
2363 if (sig > ifmgd->rssi_max_thold &&
2364 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2365 ifmgd->last_ave_beacon_signal = sig;
2366 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2367 } else if (sig < ifmgd->rssi_min_thold &&
2368 (last_sig >= ifmgd->rssi_max_thold ||
2370 ifmgd->last_ave_beacon_signal = sig;
2371 drv_rssi_callback(local, RSSI_EVENT_LOW);
2375 if (bss_conf->cqm_rssi_thold &&
2376 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2377 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2378 int sig = ifmgd->ave_beacon_signal / 16;
2379 int last_event = ifmgd->last_cqm_event_signal;
2380 int thold = bss_conf->cqm_rssi_thold;
2381 int hyst = bss_conf->cqm_rssi_hyst;
2383 (last_event == 0 || sig < last_event - hyst)) {
2384 ifmgd->last_cqm_event_signal = sig;
2385 ieee80211_cqm_rssi_notify(
2387 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2389 } else if (sig > thold &&
2390 (last_event == 0 || sig > last_event + hyst)) {
2391 ifmgd->last_cqm_event_signal = sig;
2392 ieee80211_cqm_rssi_notify(
2394 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2399 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2400 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2401 net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
2404 mutex_lock(&local->mtx);
2405 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2406 ieee80211_run_deferred_scan(local);
2407 mutex_unlock(&local->mtx);
2409 mutex_lock(&local->iflist_mtx);
2410 ieee80211_recalc_ps(local, -1);
2411 mutex_unlock(&local->iflist_mtx);
2415 * Push the beacon loss detection into the future since
2416 * we are processing a beacon from the AP just now.
2418 ieee80211_sta_reset_beacon_monitor(sdata);
2420 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2421 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2422 len - baselen, &elems,
2423 care_about_ies, ncrc);
2425 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2426 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2429 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
2430 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2433 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2434 elems.wmm_param_len);
2437 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2439 if (local->hw.conf.dynamic_ps_timeout > 0) {
2440 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2441 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2442 ieee80211_hw_config(local,
2443 IEEE80211_CONF_CHANGE_PS);
2445 ieee80211_send_nullfunc(local, sdata, 0);
2446 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2447 local->pspolling = true;
2450 * Here is assumed that the driver will be
2451 * able to send ps-poll frame and receive a
2452 * response even though power save mode is
2453 * enabled, but some drivers might require
2454 * to disable power save here. This needs
2455 * to be investigated.
2457 ieee80211_send_pspoll(local, sdata);
2462 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2464 ifmgd->beacon_crc = ncrc;
2465 ifmgd->beacon_crc_valid = true;
2467 if (elems.erp_info && elems.erp_info_len >= 1) {
2469 erp_value = elems.erp_info[0];
2473 changed |= ieee80211_handle_bss_capability(sdata,
2474 le16_to_cpu(mgmt->u.beacon.capab_info),
2475 erp_valid, erp_value);
2478 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
2479 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
2480 struct ieee80211_supported_band *sband;
2482 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2484 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2488 /* Note: country IE parsing is done for us by cfg80211 */
2489 if (elems.country_elem) {
2490 /* TODO: IBSS also needs this */
2491 if (elems.pwr_constr_elem)
2492 ieee80211_handle_pwr_constr(sdata,
2493 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2494 elems.pwr_constr_elem,
2495 elems.pwr_constr_elem_len);
2498 ieee80211_bss_info_change_notify(sdata, changed);
2501 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2502 struct sk_buff *skb)
2504 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2505 struct ieee80211_rx_status *rx_status;
2506 struct ieee80211_mgmt *mgmt;
2507 struct cfg80211_bss *bss = NULL;
2508 enum rx_mgmt_action rma = RX_MGMT_NONE;
2511 rx_status = (struct ieee80211_rx_status *) skb->cb;
2512 mgmt = (struct ieee80211_mgmt *) skb->data;
2513 fc = le16_to_cpu(mgmt->frame_control);
2515 mutex_lock(&ifmgd->mtx);
2517 switch (fc & IEEE80211_FCTL_STYPE) {
2518 case IEEE80211_STYPE_BEACON:
2519 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2521 case IEEE80211_STYPE_PROBE_RESP:
2522 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2524 case IEEE80211_STYPE_AUTH:
2525 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2527 case IEEE80211_STYPE_DEAUTH:
2528 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2530 case IEEE80211_STYPE_DISASSOC:
2531 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2533 case IEEE80211_STYPE_ASSOC_RESP:
2534 case IEEE80211_STYPE_REASSOC_RESP:
2535 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2537 case IEEE80211_STYPE_ACTION:
2538 switch (mgmt->u.action.category) {
2539 case WLAN_CATEGORY_SPECTRUM_MGMT:
2540 ieee80211_sta_process_chanswitch(sdata,
2541 &mgmt->u.action.u.chan_switch.sw_elem,
2542 (void *)ifmgd->associated->priv,
2543 rx_status->mactime);
2547 mutex_unlock(&ifmgd->mtx);
2553 case RX_MGMT_CFG80211_DEAUTH:
2554 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2556 case RX_MGMT_CFG80211_DISASSOC:
2557 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2559 case RX_MGMT_CFG80211_RX_AUTH:
2560 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2562 case RX_MGMT_CFG80211_RX_ASSOC:
2563 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2565 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2566 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2569 WARN(1, "unexpected: %d", rma);
2573 static void ieee80211_sta_timer(unsigned long data)
2575 struct ieee80211_sub_if_data *sdata =
2576 (struct ieee80211_sub_if_data *) data;
2577 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2578 struct ieee80211_local *local = sdata->local;
2580 if (local->quiescing) {
2581 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2585 ieee80211_queue_work(&local->hw, &sdata->work);
2588 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2589 u8 *bssid, u8 reason)
2591 struct ieee80211_local *local = sdata->local;
2592 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2593 u8 frame_buf[DEAUTH_DISASSOC_LEN];
2595 ieee80211_stop_poll(sdata);
2597 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2599 mutex_unlock(&ifmgd->mtx);
2602 * must be outside lock due to cfg80211,
2603 * but that's not a problem.
2605 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
2607 mutex_lock(&local->mtx);
2608 ieee80211_recalc_idle(local);
2609 mutex_unlock(&local->mtx);
2611 mutex_lock(&ifmgd->mtx);
2614 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2616 struct ieee80211_local *local = sdata->local;
2617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2618 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2620 lockdep_assert_held(&ifmgd->mtx);
2622 if (WARN_ON_ONCE(!auth_data))
2627 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2628 pr_debug("%s: authentication with %pM timed out\n",
2629 sdata->name, auth_data->bss->bssid);
2632 * Most likely AP is not in the range so remove the
2633 * bss struct for that AP.
2635 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2640 if (auth_data->bss->proberesp_ies) {
2641 pr_debug("%s: send auth to %pM (try %d/%d)\n",
2642 sdata->name, auth_data->bss->bssid, auth_data->tries,
2643 IEEE80211_AUTH_MAX_TRIES);
2645 auth_data->expected_transaction = 2;
2646 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2647 auth_data->ie, auth_data->ie_len,
2648 auth_data->bss->bssid,
2649 auth_data->bss->bssid, NULL, 0, 0);
2653 pr_debug("%s: direct probe to %pM (try %d/%i)\n",
2654 sdata->name, auth_data->bss->bssid, auth_data->tries,
2655 IEEE80211_AUTH_MAX_TRIES);
2657 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2661 * Direct probe is sent to broadcast address as some APs
2662 * will not answer to direct packet in unassociated state.
2664 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2665 NULL, 0, (u32) -1, true, false);
2668 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2669 run_again(ifmgd, auth_data->timeout);
2674 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2676 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2677 struct ieee80211_local *local = sdata->local;
2679 lockdep_assert_held(&sdata->u.mgd.mtx);
2681 assoc_data->tries++;
2682 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2683 pr_debug("%s: association with %pM timed out\n",
2684 sdata->name, assoc_data->bss->bssid);
2687 * Most likely AP is not in the range so remove the
2688 * bss struct for that AP.
2690 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2695 pr_debug("%s: associate with %pM (try %d/%d)\n",
2696 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2697 IEEE80211_ASSOC_MAX_TRIES);
2698 ieee80211_send_assoc(sdata);
2700 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2701 run_again(&sdata->u.mgd, assoc_data->timeout);
2706 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2708 struct ieee80211_local *local = sdata->local;
2709 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2711 mutex_lock(&ifmgd->mtx);
2713 if (ifmgd->auth_data &&
2714 time_after(jiffies, ifmgd->auth_data->timeout)) {
2715 if (ifmgd->auth_data->done) {
2717 * ok ... we waited for assoc but userspace didn't,
2718 * so let's just kill the auth data
2720 ieee80211_destroy_auth_data(sdata, false);
2721 } else if (ieee80211_probe_auth(sdata)) {
2724 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2726 ieee80211_destroy_auth_data(sdata, false);
2728 mutex_unlock(&ifmgd->mtx);
2729 cfg80211_send_auth_timeout(sdata->dev, bssid);
2730 mutex_lock(&ifmgd->mtx);
2732 } else if (ifmgd->auth_data)
2733 run_again(ifmgd, ifmgd->auth_data->timeout);
2735 if (ifmgd->assoc_data &&
2736 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2737 if (!ifmgd->assoc_data->have_beacon ||
2738 ieee80211_do_assoc(sdata)) {
2741 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2743 ieee80211_destroy_assoc_data(sdata, false);
2745 mutex_unlock(&ifmgd->mtx);
2746 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2747 mutex_lock(&ifmgd->mtx);
2749 } else if (ifmgd->assoc_data)
2750 run_again(ifmgd, ifmgd->assoc_data->timeout);
2752 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2753 IEEE80211_STA_CONNECTION_POLL) &&
2754 ifmgd->associated) {
2758 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2760 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2761 max_tries = max_nullfunc_tries;
2763 max_tries = max_probe_tries;
2765 /* ACK received for nullfunc probing frame */
2766 if (!ifmgd->probe_send_count)
2767 ieee80211_reset_ap_probe(sdata);
2768 else if (ifmgd->nullfunc_failed) {
2769 if (ifmgd->probe_send_count < max_tries) {
2770 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2771 wiphy_debug(local->hw.wiphy,
2772 "%s: No ack for nullfunc frame to"
2773 " AP %pM, try %d/%i\n",
2775 ifmgd->probe_send_count, max_tries);
2777 ieee80211_mgd_probe_ap_send(sdata);
2779 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2780 wiphy_debug(local->hw.wiphy,
2781 "%s: No ack for nullfunc frame to"
2782 " AP %pM, disconnecting.\n",
2783 sdata->name, bssid);
2785 ieee80211_sta_connection_lost(sdata, bssid,
2786 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2788 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2789 run_again(ifmgd, ifmgd->probe_timeout);
2790 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2791 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2792 wiphy_debug(local->hw.wiphy,
2793 "%s: Failed to send nullfunc to AP %pM"
2794 " after %dms, disconnecting.\n",
2796 bssid, probe_wait_ms);
2798 ieee80211_sta_connection_lost(sdata, bssid,
2799 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2800 } else if (ifmgd->probe_send_count < max_tries) {
2801 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2802 wiphy_debug(local->hw.wiphy,
2803 "%s: No probe response from AP %pM"
2804 " after %dms, try %d/%i\n",
2806 bssid, probe_wait_ms,
2807 ifmgd->probe_send_count, max_tries);
2809 ieee80211_mgd_probe_ap_send(sdata);
2812 * We actually lost the connection ... or did we?
2815 wiphy_debug(local->hw.wiphy,
2816 "%s: No probe response from AP %pM"
2817 " after %dms, disconnecting.\n",
2819 bssid, probe_wait_ms);
2821 ieee80211_sta_connection_lost(sdata, bssid,
2822 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2826 mutex_unlock(&ifmgd->mtx);
2828 mutex_lock(&local->mtx);
2829 ieee80211_recalc_idle(local);
2830 mutex_unlock(&local->mtx);
2833 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2835 struct ieee80211_sub_if_data *sdata =
2836 (struct ieee80211_sub_if_data *) data;
2837 struct ieee80211_local *local = sdata->local;
2839 if (local->quiescing)
2842 ieee80211_queue_work(&sdata->local->hw,
2843 &sdata->u.mgd.beacon_connection_loss_work);
2846 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2848 struct ieee80211_sub_if_data *sdata =
2849 (struct ieee80211_sub_if_data *) data;
2850 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2851 struct ieee80211_local *local = sdata->local;
2853 if (local->quiescing)
2856 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2859 static void ieee80211_sta_monitor_work(struct work_struct *work)
2861 struct ieee80211_sub_if_data *sdata =
2862 container_of(work, struct ieee80211_sub_if_data,
2863 u.mgd.monitor_work);
2865 ieee80211_mgd_probe_ap(sdata, false);
2868 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2872 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2873 __ieee80211_stop_poll(sdata);
2875 /* let's probe the connection once */
2876 flags = sdata->local->hw.flags;
2877 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2878 ieee80211_queue_work(&sdata->local->hw,
2879 &sdata->u.mgd.monitor_work);
2880 /* and do all the other regular work too */
2881 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2886 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2888 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2891 * we need to use atomic bitops for the running bits
2892 * only because both timers might fire at the same
2893 * time -- the code here is properly synchronised.
2896 cancel_work_sync(&ifmgd->request_smps_work);
2898 cancel_work_sync(&ifmgd->monitor_work);
2899 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
2900 if (del_timer_sync(&ifmgd->timer))
2901 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2903 cancel_work_sync(&ifmgd->chswitch_work);
2904 if (del_timer_sync(&ifmgd->chswitch_timer))
2905 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2907 /* these will just be re-established on connection */
2908 del_timer_sync(&ifmgd->conn_mon_timer);
2909 del_timer_sync(&ifmgd->bcn_mon_timer);
2912 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2914 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2916 if (!ifmgd->associated)
2919 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2920 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2921 mutex_lock(&ifmgd->mtx);
2922 if (ifmgd->associated) {
2923 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2924 wiphy_debug(sdata->local->hw.wiphy,
2925 "%s: driver requested disconnect after resume.\n",
2928 ieee80211_sta_connection_lost(sdata,
2929 ifmgd->associated->bssid,
2930 WLAN_REASON_UNSPECIFIED);
2931 mutex_unlock(&ifmgd->mtx);
2934 mutex_unlock(&ifmgd->mtx);
2937 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2938 add_timer(&ifmgd->timer);
2939 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2940 add_timer(&ifmgd->chswitch_timer);
2941 ieee80211_sta_reset_beacon_monitor(sdata);
2943 mutex_lock(&sdata->local->mtx);
2944 ieee80211_restart_sta_timer(sdata);
2945 mutex_unlock(&sdata->local->mtx);
2949 /* interface setup */
2950 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2952 struct ieee80211_if_managed *ifmgd;
2954 ifmgd = &sdata->u.mgd;
2955 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2956 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2957 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2958 ieee80211_beacon_connection_loss_work);
2959 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
2960 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2961 (unsigned long) sdata);
2962 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2963 (unsigned long) sdata);
2964 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2965 (unsigned long) sdata);
2966 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2967 (unsigned long) sdata);
2970 ifmgd->powersave = sdata->wdev.ps;
2971 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2972 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
2974 mutex_init(&ifmgd->mtx);
2976 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2977 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2979 ifmgd->req_smps = IEEE80211_SMPS_OFF;
2982 /* scan finished notification */
2983 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2985 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2987 /* Restart STA timers */
2989 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2990 ieee80211_restart_sta_timer(sdata);
2994 int ieee80211_max_network_latency(struct notifier_block *nb,
2995 unsigned long data, void *dummy)
2997 s32 latency_usec = (s32) data;
2998 struct ieee80211_local *local =
2999 container_of(nb, struct ieee80211_local,
3000 network_latency_notifier);
3002 mutex_lock(&local->iflist_mtx);
3003 ieee80211_recalc_ps(local, latency_usec);
3004 mutex_unlock(&local->iflist_mtx);
3009 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3010 struct cfg80211_bss *cbss, bool assoc)
3012 struct ieee80211_local *local = sdata->local;
3013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3014 struct ieee80211_bss *bss = (void *)cbss->priv;
3015 struct sta_info *sta = NULL;
3016 bool have_sta = false;
3019 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3020 const u8 *ht_oper_ie;
3021 const struct ieee80211_ht_operation *ht_oper = NULL;
3022 struct ieee80211_supported_band *sband;
3024 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3029 have_sta = sta_info_get(sdata, cbss->bssid);
3034 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3039 mutex_lock(&local->mtx);
3040 ieee80211_recalc_idle(sdata->local);
3041 mutex_unlock(&local->mtx);
3043 /* switch to the right channel */
3044 sband = local->hw.wiphy->bands[cbss->channel->band];
3046 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3048 if (sband->ht_cap.ht_supported) {
3049 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3050 cbss->information_elements,
3051 cbss->len_information_elements);
3052 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3053 ht_oper = (void *)(ht_oper_ie + 2);
3057 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3058 cbss->channel->band);
3059 /* check that channel matches the right operating channel */
3060 if (cbss->channel->center_freq != ht_cfreq) {
3062 * It's possible that some APs are confused here;
3063 * Netgear WNDR3700 sometimes reports 4 higher than
3064 * the actual channel in association responses, but
3065 * since we look at probe response/beacon data here
3068 pr_debug("%s: Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3069 sdata->name, cbss->channel->center_freq,
3070 ht_cfreq, ht_oper->primary_chan,
3071 cbss->channel->band);
3077 channel_type = NL80211_CHAN_HT20;
3079 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3080 switch (ht_oper->ht_param &
3081 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3082 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3083 channel_type = NL80211_CHAN_HT40PLUS;
3085 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3086 channel_type = NL80211_CHAN_HT40MINUS;
3092 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3093 /* can only fail due to HT40+/- mismatch */
3094 channel_type = NL80211_CHAN_HT20;
3095 pr_debug("%s: disabling 40 MHz due to multi-vif mismatch\n",
3097 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3098 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3102 local->oper_channel = cbss->channel;
3103 ieee80211_hw_config(local, 0);
3106 u32 rates = 0, basic_rates = 0;
3107 bool have_higher_than_11mbit;
3108 int min_rate = INT_MAX, min_rate_index = -1;
3110 ieee80211_get_rates(sband, bss->supp_rates,
3111 bss->supp_rates_len,
3112 &rates, &basic_rates,
3113 &have_higher_than_11mbit,
3114 &min_rate, &min_rate_index);
3117 * This used to be a workaround for basic rates missing
3118 * in the association response frame. Now that we no
3119 * longer use the basic rates from there, it probably
3120 * doesn't happen any more, but keep the workaround so
3121 * in case some *other* APs are buggy in different ways
3122 * we can connect -- with a warning.
3124 if (!basic_rates && min_rate_index >= 0) {
3125 pr_debug("%s: No basic rates, using min rate instead\n",
3127 basic_rates = BIT(min_rate_index);
3130 sta->sta.supp_rates[cbss->channel->band] = rates;
3131 sdata->vif.bss_conf.basic_rates = basic_rates;
3133 /* cf. IEEE 802.11 9.2.12 */
3134 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3135 have_higher_than_11mbit)
3136 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3138 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3140 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3142 /* tell driver about BSSID and basic rates */
3143 ieee80211_bss_info_change_notify(sdata,
3144 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
3147 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3149 err = sta_info_insert(sta);
3152 pr_debug("%s: failed to insert STA entry for the AP (error %d)\n",
3157 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3163 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3164 struct cfg80211_auth_request *req)
3166 struct ieee80211_local *local = sdata->local;
3167 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3168 struct ieee80211_mgd_auth_data *auth_data;
3172 /* prepare auth data structure */
3174 switch (req->auth_type) {
3175 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3176 auth_alg = WLAN_AUTH_OPEN;
3178 case NL80211_AUTHTYPE_SHARED_KEY:
3179 if (IS_ERR(local->wep_tx_tfm))
3181 auth_alg = WLAN_AUTH_SHARED_KEY;
3183 case NL80211_AUTHTYPE_FT:
3184 auth_alg = WLAN_AUTH_FT;
3186 case NL80211_AUTHTYPE_NETWORK_EAP:
3187 auth_alg = WLAN_AUTH_LEAP;
3193 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3197 auth_data->bss = req->bss;
3199 if (req->ie && req->ie_len) {
3200 memcpy(auth_data->ie, req->ie, req->ie_len);
3201 auth_data->ie_len = req->ie_len;
3204 if (req->key && req->key_len) {
3205 auth_data->key_len = req->key_len;
3206 auth_data->key_idx = req->key_idx;
3207 memcpy(auth_data->key, req->key, req->key_len);
3210 auth_data->algorithm = auth_alg;
3212 /* try to authenticate/probe */
3214 mutex_lock(&ifmgd->mtx);
3216 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3217 ifmgd->assoc_data) {
3222 if (ifmgd->auth_data)
3223 ieee80211_destroy_auth_data(sdata, false);
3225 /* prep auth_data so we don't go into idle on disassoc */
3226 ifmgd->auth_data = auth_data;
3228 if (ifmgd->associated)
3229 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3231 pr_debug("%s: authenticate with %pM\n", sdata->name, req->bss->bssid);
3233 err = ieee80211_prep_connection(sdata, req->bss, false);
3237 err = ieee80211_probe_auth(sdata);
3239 sta_info_destroy_addr(sdata, req->bss->bssid);
3243 /* hold our own reference */
3244 cfg80211_ref_bss(auth_data->bss);
3249 ifmgd->auth_data = NULL;
3253 mutex_unlock(&ifmgd->mtx);
3258 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3259 struct cfg80211_assoc_request *req)
3261 struct ieee80211_local *local = sdata->local;
3262 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3263 struct ieee80211_bss *bss = (void *)req->bss->priv;
3264 struct ieee80211_mgd_assoc_data *assoc_data;
3265 struct ieee80211_supported_band *sband;
3266 const u8 *ssidie, *ht_ie;
3269 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3273 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3277 mutex_lock(&ifmgd->mtx);
3279 if (ifmgd->associated)
3280 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3282 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3287 if (ifmgd->assoc_data) {
3292 if (ifmgd->auth_data) {
3295 /* keep sta info, bssid if matching */
3296 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3297 ieee80211_destroy_auth_data(sdata, match);
3300 /* prepare assoc data */
3302 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
3303 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
3305 ifmgd->beacon_crc_valid = false;
3308 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3309 * We still associate in non-HT mode (11a/b/g) if any one of these
3310 * ciphers is configured as pairwise.
3311 * We can set this to true for non-11n hardware, that'll be checked
3312 * separately along with the peer capabilities.
3314 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
3315 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3316 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3317 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
3318 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3319 netdev_info(sdata->dev,
3320 "disabling HT due to WEP/TKIP use\n");
3324 if (req->flags & ASSOC_REQ_DISABLE_HT)
3325 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3327 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3328 sband = local->hw.wiphy->bands[req->bss->channel->band];
3329 if (!sband->ht_cap.ht_supported ||
3330 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3331 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3332 netdev_info(sdata->dev,
3333 "disabling HT as WMM/QoS is not supported\n");
3336 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3337 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3338 sizeof(ifmgd->ht_capa_mask));
3340 if (req->ie && req->ie_len) {
3341 memcpy(assoc_data->ie, req->ie, req->ie_len);
3342 assoc_data->ie_len = req->ie_len;
3345 assoc_data->bss = req->bss;
3347 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3348 if (ifmgd->powersave)
3349 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3351 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3353 ifmgd->ap_smps = ifmgd->req_smps;
3355 assoc_data->capability = req->bss->capability;
3356 assoc_data->wmm = bss->wmm_used &&
3357 (local->hw.queues >= IEEE80211_NUM_ACS);
3358 assoc_data->supp_rates = bss->supp_rates;
3359 assoc_data->supp_rates_len = bss->supp_rates_len;
3361 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3362 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3363 assoc_data->ap_ht_param =
3364 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3366 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3368 if (bss->wmm_used && bss->uapsd_supported &&
3369 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3370 assoc_data->uapsd = true;
3371 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3373 assoc_data->uapsd = false;
3374 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3377 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3378 assoc_data->ssid_len = ssidie[1];
3380 if (req->prev_bssid)
3381 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3384 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3385 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3387 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3388 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3391 if (req->crypto.control_port)
3392 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3394 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3396 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3397 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3399 /* kick off associate process */
3401 ifmgd->assoc_data = assoc_data;
3403 err = ieee80211_prep_connection(sdata, req->bss, true);
3407 if (!bss->dtim_period &&
3408 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3410 * Wait up to one beacon interval ...
3411 * should this be more if we miss one?
3413 pr_debug("%s: waiting for beacon from %pM\n",
3414 sdata->name, ifmgd->bssid);
3415 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
3417 assoc_data->have_beacon = true;
3418 assoc_data->sent_assoc = false;
3419 assoc_data->timeout = jiffies;
3421 run_again(ifmgd, assoc_data->timeout);
3423 if (bss->corrupt_data) {
3424 char *corrupt_type = "data";
3425 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3426 if (bss->corrupt_data &
3427 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3428 corrupt_type = "beacon and probe response";
3430 corrupt_type = "beacon";
3431 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3432 corrupt_type = "probe response";
3433 pr_debug("%s: associating with AP with corrupt %s\n",
3434 sdata->name, corrupt_type);
3440 ifmgd->assoc_data = NULL;
3444 mutex_unlock(&ifmgd->mtx);
3449 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
3450 struct cfg80211_deauth_request *req)
3452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3453 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3455 mutex_lock(&ifmgd->mtx);
3457 if (ifmgd->auth_data) {
3458 ieee80211_destroy_auth_data(sdata, false);
3459 mutex_unlock(&ifmgd->mtx);
3463 pr_debug("%s: deauthenticating from %pM by local choice (reason=%d)\n",
3464 sdata->name, req->bssid, req->reason_code);
3466 if (ifmgd->associated &&
3467 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
3468 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3469 req->reason_code, true, frame_buf);
3471 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3472 IEEE80211_STYPE_DEAUTH,
3473 req->reason_code, true,
3475 mutex_unlock(&ifmgd->mtx);
3477 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3479 mutex_lock(&sdata->local->mtx);
3480 ieee80211_recalc_idle(sdata->local);
3481 mutex_unlock(&sdata->local->mtx);
3486 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
3487 struct cfg80211_disassoc_request *req)
3489 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3491 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3493 mutex_lock(&ifmgd->mtx);
3496 * cfg80211 should catch this ... but it's racy since
3497 * we can receive a disassoc frame, process it, hand it
3498 * to cfg80211 while that's in a locked section already
3499 * trying to tell us that the user wants to disconnect.
3501 if (ifmgd->associated != req->bss) {
3502 mutex_unlock(&ifmgd->mtx);
3506 pr_debug("%s: disassociating from %pM by local choice (reason=%d)\n",
3507 sdata->name, req->bss->bssid, req->reason_code);
3509 memcpy(bssid, req->bss->bssid, ETH_ALEN);
3510 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3511 req->reason_code, !req->local_state_change,
3513 mutex_unlock(&ifmgd->mtx);
3515 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3517 mutex_lock(&sdata->local->mtx);
3518 ieee80211_recalc_idle(sdata->local);
3519 mutex_unlock(&sdata->local->mtx);
3524 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
3526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3528 mutex_lock(&ifmgd->mtx);
3529 if (ifmgd->assoc_data)
3530 ieee80211_destroy_assoc_data(sdata, false);
3531 if (ifmgd->auth_data)
3532 ieee80211_destroy_auth_data(sdata, false);
3533 del_timer_sync(&ifmgd->timer);
3534 mutex_unlock(&ifmgd->mtx);
3537 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3538 enum nl80211_cqm_rssi_threshold_event rssi_event,
3541 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3543 trace_api_cqm_rssi_notify(sdata, rssi_event);
3545 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3547 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);