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/rtnetlink.h>
20 #include <linux/pm_qos_params.h>
21 #include <linux/crc32.h>
22 #include <net/mac80211.h>
23 #include <asm/unaligned.h>
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
30 #define IEEE80211_MAX_PROBE_TRIES 5
33 * beacon loss detection timeout
34 * XXX: should depend on beacon interval
36 #define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
38 * Time the connection can be idle before we probe
39 * it to see if we can still talk to the AP.
41 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
43 * Time we wait for a probe response after sending
44 * a probe request because of beacon loss or for
45 * checking the connection still works.
47 #define IEEE80211_PROBE_WAIT (HZ / 2)
50 * Weight given to the latest Beacon frame when calculating average signal
51 * strength for Beacon frames received in the current BSS. This must be
54 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
56 #define TMR_RUNNING_TIMER 0
57 #define TMR_RUNNING_CHANSW 1
60 * All cfg80211 functions have to be called outside a locked
61 * section so that they can acquire a lock themselves... This
62 * is much simpler than queuing up things in cfg80211, but we
63 * do need some indirection for that here.
66 /* no action required */
69 /* caller must call cfg80211_send_rx_auth() */
70 RX_MGMT_CFG80211_AUTH,
72 /* caller must call cfg80211_send_rx_assoc() */
73 RX_MGMT_CFG80211_ASSOC,
75 /* caller must call cfg80211_send_deauth() */
76 RX_MGMT_CFG80211_DEAUTH,
78 /* caller must call cfg80211_send_disassoc() */
79 RX_MGMT_CFG80211_DISASSOC,
81 /* caller must tell cfg80211 about internal error */
82 RX_MGMT_CFG80211_ASSOC_ERROR,
86 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
88 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
92 * We can have multiple work items (and connection probing)
93 * scheduling this timer, but we need to take care to only
94 * reschedule it when it should fire _earlier_ than it was
95 * asked for before, or if it's not pending right now. This
96 * function ensures that. Note that it then is required to
97 * run this function for all timeouts after the first one
98 * has happened -- the work that runs from this timer will
101 static void run_again(struct ieee80211_if_managed *ifmgd,
102 unsigned long timeout)
104 ASSERT_MGD_MTX(ifmgd);
106 if (!timer_pending(&ifmgd->timer) ||
107 time_before(timeout, ifmgd->timer.expires))
108 mod_timer(&ifmgd->timer, timeout);
111 static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
113 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
116 mod_timer(&sdata->u.mgd.bcn_mon_timer,
117 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
120 static int ecw2cw(int ecw)
122 return (1 << ecw) - 1;
126 * ieee80211_enable_ht should be called only after the operating band
127 * has been determined as ht configuration depends on the hw's
128 * HT abilities for a specific band.
130 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
131 struct ieee80211_ht_info *hti,
132 const u8 *bssid, u16 ap_ht_cap_flags)
134 struct ieee80211_local *local = sdata->local;
135 struct ieee80211_supported_band *sband;
136 struct sta_info *sta;
139 bool enable_ht = true, ht_changed;
140 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
142 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
144 /* HT is not supported */
145 if (!sband->ht_cap.ht_supported)
148 /* check that channel matches the right operating channel */
149 if (local->hw.conf.channel->center_freq !=
150 ieee80211_channel_to_frequency(hti->control_chan))
154 channel_type = NL80211_CHAN_HT20;
156 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
157 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
158 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
159 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
160 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
161 if (!(local->hw.conf.channel->flags &
162 IEEE80211_CHAN_NO_HT40PLUS))
163 channel_type = NL80211_CHAN_HT40PLUS;
165 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
166 if (!(local->hw.conf.channel->flags &
167 IEEE80211_CHAN_NO_HT40MINUS))
168 channel_type = NL80211_CHAN_HT40MINUS;
174 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
175 channel_type != local->hw.conf.channel_type;
177 local->oper_channel_type = channel_type;
180 /* channel_type change automatically detected */
181 ieee80211_hw_config(local, 0);
184 sta = sta_info_get(sdata, bssid);
186 rate_control_rate_update(local, sband, sta,
187 IEEE80211_RC_HT_CHANGED,
188 local->oper_channel_type);
196 ht_opmode = le16_to_cpu(hti->operation_mode);
198 /* if bss configuration changed store the new one */
199 if (!sdata->ht_opmode_valid ||
200 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
201 changed |= BSS_CHANGED_HT;
202 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
203 sdata->ht_opmode_valid = true;
209 /* frame sending functions */
211 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
212 const u8 *bssid, u16 stype, u16 reason,
213 void *cookie, bool send_frame)
215 struct ieee80211_local *local = sdata->local;
216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
218 struct ieee80211_mgmt *mgmt;
220 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
222 printk(KERN_DEBUG "%s: failed to allocate buffer for "
223 "deauth/disassoc frame\n", sdata->name);
226 skb_reserve(skb, local->hw.extra_tx_headroom);
228 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
230 memcpy(mgmt->da, bssid, ETH_ALEN);
231 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
232 memcpy(mgmt->bssid, bssid, ETH_ALEN);
233 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
235 /* u.deauth.reason_code == u.disassoc.reason_code */
236 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
238 if (stype == IEEE80211_STYPE_DEAUTH)
240 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
242 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
245 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
247 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
248 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
249 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
252 ieee80211_tx_skb(sdata, skb);
257 void ieee80211_send_pspoll(struct ieee80211_local *local,
258 struct ieee80211_sub_if_data *sdata)
260 struct ieee80211_pspoll *pspoll;
263 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
267 pspoll = (struct ieee80211_pspoll *) skb->data;
268 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
270 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
271 ieee80211_tx_skb(sdata, skb);
274 void ieee80211_send_nullfunc(struct ieee80211_local *local,
275 struct ieee80211_sub_if_data *sdata,
279 struct ieee80211_hdr_3addr *nullfunc;
281 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
285 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
287 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
289 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
290 ieee80211_tx_skb(sdata, skb);
293 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
294 struct ieee80211_sub_if_data *sdata)
297 struct ieee80211_hdr *nullfunc;
300 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
303 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
305 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
306 "nullfunc frame\n", sdata->name);
309 skb_reserve(skb, local->hw.extra_tx_headroom);
311 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
312 memset(nullfunc, 0, 30);
313 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
314 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
315 nullfunc->frame_control = fc;
316 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
317 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
318 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
319 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
321 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
322 ieee80211_tx_skb(sdata, skb);
325 /* spectrum management related things */
326 static void ieee80211_chswitch_work(struct work_struct *work)
328 struct ieee80211_sub_if_data *sdata =
329 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
332 if (!ieee80211_sdata_running(sdata))
335 mutex_lock(&ifmgd->mtx);
336 if (!ifmgd->associated)
339 sdata->local->oper_channel = sdata->local->csa_channel;
340 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
342 /* XXX: shouldn't really modify cfg80211-owned data! */
343 ifmgd->associated->channel = sdata->local->oper_channel;
345 ieee80211_wake_queues_by_reason(&sdata->local->hw,
346 IEEE80211_QUEUE_STOP_REASON_CSA);
348 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
349 mutex_unlock(&ifmgd->mtx);
352 static void ieee80211_chswitch_timer(unsigned long data)
354 struct ieee80211_sub_if_data *sdata =
355 (struct ieee80211_sub_if_data *) data;
356 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
358 if (sdata->local->quiescing) {
359 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
363 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
366 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
367 struct ieee80211_channel_sw_ie *sw_elem,
368 struct ieee80211_bss *bss)
370 struct cfg80211_bss *cbss =
371 container_of((void *)bss, struct cfg80211_bss, priv);
372 struct ieee80211_channel *new_ch;
373 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
374 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
376 ASSERT_MGD_MTX(ifmgd);
378 if (!ifmgd->associated)
381 if (sdata->local->scanning)
384 /* Disregard subsequent beacons if we are already running a timer
387 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
390 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
391 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
394 sdata->local->csa_channel = new_ch;
396 if (sw_elem->count <= 1) {
397 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
399 ieee80211_stop_queues_by_reason(&sdata->local->hw,
400 IEEE80211_QUEUE_STOP_REASON_CSA);
401 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
402 mod_timer(&ifmgd->chswitch_timer,
404 msecs_to_jiffies(sw_elem->count *
405 cbss->beacon_interval));
409 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
410 u16 capab_info, u8 *pwr_constr_elem,
411 u8 pwr_constr_elem_len)
413 struct ieee80211_conf *conf = &sdata->local->hw.conf;
415 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
418 /* Power constraint IE length should be 1 octet */
419 if (pwr_constr_elem_len != 1)
422 if ((*pwr_constr_elem <= conf->channel->max_power) &&
423 (*pwr_constr_elem != sdata->local->power_constr_level)) {
424 sdata->local->power_constr_level = *pwr_constr_elem;
425 ieee80211_hw_config(sdata->local, 0);
430 static void ieee80211_enable_ps(struct ieee80211_local *local,
431 struct ieee80211_sub_if_data *sdata)
433 struct ieee80211_conf *conf = &local->hw.conf;
436 * If we are scanning right now then the parameters will
437 * take effect when scan finishes.
442 if (conf->dynamic_ps_timeout > 0 &&
443 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
444 mod_timer(&local->dynamic_ps_timer, jiffies +
445 msecs_to_jiffies(conf->dynamic_ps_timeout));
447 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
448 ieee80211_send_nullfunc(local, sdata, 1);
450 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
451 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
454 conf->flags |= IEEE80211_CONF_PS;
455 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
459 static void ieee80211_change_ps(struct ieee80211_local *local)
461 struct ieee80211_conf *conf = &local->hw.conf;
463 if (local->ps_sdata) {
464 ieee80211_enable_ps(local, local->ps_sdata);
465 } else if (conf->flags & IEEE80211_CONF_PS) {
466 conf->flags &= ~IEEE80211_CONF_PS;
467 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
468 del_timer_sync(&local->dynamic_ps_timer);
469 cancel_work_sync(&local->dynamic_ps_enable_work);
473 /* need to hold RTNL or interface lock */
474 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
476 struct ieee80211_sub_if_data *sdata, *found = NULL;
479 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
480 local->ps_sdata = NULL;
484 if (!list_empty(&local->work_list)) {
485 local->ps_sdata = NULL;
489 list_for_each_entry(sdata, &local->interfaces, list) {
490 if (!ieee80211_sdata_running(sdata))
492 if (sdata->vif.type != NL80211_IFTYPE_STATION)
498 if (count == 1 && found->u.mgd.powersave &&
499 found->u.mgd.associated &&
500 found->u.mgd.associated->beacon_ies &&
501 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
502 IEEE80211_STA_CONNECTION_POLL))) {
506 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
508 beaconint_us = ieee80211_tu_to_usec(
509 found->vif.bss_conf.beacon_int);
511 if (beaconint_us > latency) {
512 local->ps_sdata = NULL;
514 struct ieee80211_bss *bss;
518 bss = (void *)found->u.mgd.associated->priv;
519 dtimper = bss->dtim_period;
521 /* If the TIM IE is invalid, pretend the value is 1 */
524 else if (dtimper > 1)
525 maxslp = min_t(int, dtimper,
526 latency / beaconint_us);
528 local->hw.conf.max_sleep_period = maxslp;
529 local->hw.conf.ps_dtim_period = dtimper;
530 local->ps_sdata = found;
533 local->ps_sdata = NULL;
537 ieee80211_change_ps(local);
540 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
542 struct ieee80211_local *local =
543 container_of(work, struct ieee80211_local,
544 dynamic_ps_disable_work);
546 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
547 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
548 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
551 ieee80211_wake_queues_by_reason(&local->hw,
552 IEEE80211_QUEUE_STOP_REASON_PS);
555 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
557 struct ieee80211_local *local =
558 container_of(work, struct ieee80211_local,
559 dynamic_ps_enable_work);
560 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
561 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
563 /* can only happen when PS was just disabled anyway */
567 if (local->hw.conf.flags & IEEE80211_CONF_PS)
570 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
571 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
572 ieee80211_send_nullfunc(local, sdata, 1);
574 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
575 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
576 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
577 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
578 local->hw.conf.flags |= IEEE80211_CONF_PS;
579 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
583 void ieee80211_dynamic_ps_timer(unsigned long data)
585 struct ieee80211_local *local = (void *) data;
587 if (local->quiescing || local->suspended)
590 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
594 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
595 struct ieee80211_if_managed *ifmgd,
596 u8 *wmm_param, size_t wmm_param_len)
598 struct ieee80211_tx_queue_params params;
601 u8 *pos, uapsd_queues = 0;
603 if (!local->ops->conf_tx)
606 if (local->hw.queues < 4)
612 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
615 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
616 uapsd_queues = local->uapsd_queues;
618 count = wmm_param[6] & 0x0f;
619 if (count == ifmgd->wmm_last_param_set)
621 ifmgd->wmm_last_param_set = count;
624 left = wmm_param_len - 8;
626 memset(¶ms, 0, sizeof(params));
629 for (; left >= 4; left -= 4, pos += 4) {
630 int aci = (pos[0] >> 5) & 0x03;
631 int acm = (pos[0] >> 4) & 0x01;
639 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
640 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
646 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
647 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
653 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
654 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
661 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
662 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
667 params.aifs = pos[0] & 0x0f;
668 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
669 params.cw_min = ecw2cw(pos[1] & 0x0f);
670 params.txop = get_unaligned_le16(pos + 2);
671 params.uapsd = uapsd;
673 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
674 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
675 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
676 wiphy_name(local->hw.wiphy), queue, aci, acm,
677 params.aifs, params.cw_min, params.cw_max, params.txop,
680 if (drv_conf_tx(local, queue, ¶ms))
681 printk(KERN_DEBUG "%s: failed to set TX queue "
682 "parameters for queue %d\n",
683 wiphy_name(local->hw.wiphy), queue);
686 /* enable WMM or activate new settings */
687 local->hw.conf.flags |= IEEE80211_CONF_QOS;
688 drv_config(local, IEEE80211_CONF_CHANGE_QOS);
691 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
692 u16 capab, bool erp_valid, u8 erp)
694 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
697 bool use_short_preamble;
701 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
702 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
704 use_protection = false;
705 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
708 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
709 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
710 use_short_slot = true;
712 if (use_protection != bss_conf->use_cts_prot) {
713 bss_conf->use_cts_prot = use_protection;
714 changed |= BSS_CHANGED_ERP_CTS_PROT;
717 if (use_short_preamble != bss_conf->use_short_preamble) {
718 bss_conf->use_short_preamble = use_short_preamble;
719 changed |= BSS_CHANGED_ERP_PREAMBLE;
722 if (use_short_slot != bss_conf->use_short_slot) {
723 bss_conf->use_short_slot = use_short_slot;
724 changed |= BSS_CHANGED_ERP_SLOT;
730 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
731 struct cfg80211_bss *cbss,
732 u32 bss_info_changed)
734 struct ieee80211_bss *bss = (void *)cbss->priv;
735 struct ieee80211_local *local = sdata->local;
737 bss_info_changed |= BSS_CHANGED_ASSOC;
738 /* set timing information */
739 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
740 sdata->vif.bss_conf.timestamp = cbss->tsf;
742 bss_info_changed |= BSS_CHANGED_BEACON_INT;
743 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
744 cbss->capability, bss->has_erp_value, bss->erp_value);
746 sdata->u.mgd.associated = cbss;
747 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
749 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
751 /* just to be sure */
752 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
753 IEEE80211_STA_BEACON_POLL);
756 * Always handle WMM once after association regardless
757 * of the first value the AP uses. Setting -1 here has
758 * that effect because the AP values is an unsigned
761 sdata->u.mgd.wmm_last_param_set = -1;
763 ieee80211_led_assoc(local, 1);
765 sdata->vif.bss_conf.assoc = 1;
767 * For now just always ask the driver to update the basic rateset
768 * when we have associated, we aren't checking whether it actually
771 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
773 /* And the BSSID changed - we're associated now */
774 bss_info_changed |= BSS_CHANGED_BSSID;
776 /* Tell the driver to monitor connection quality (if supported) */
777 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
778 sdata->vif.bss_conf.cqm_rssi_thold)
779 bss_info_changed |= BSS_CHANGED_CQM;
781 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
783 mutex_lock(&local->iflist_mtx);
784 ieee80211_recalc_ps(local, -1);
785 ieee80211_recalc_smps(local, sdata);
786 mutex_unlock(&local->iflist_mtx);
788 netif_tx_start_all_queues(sdata->dev);
789 netif_carrier_on(sdata->dev);
792 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
796 struct ieee80211_local *local = sdata->local;
797 struct sta_info *sta;
798 u32 changed = 0, config_changed = 0;
801 ASSERT_MGD_MTX(ifmgd);
803 if (WARN_ON(!ifmgd->associated))
806 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
808 ifmgd->associated = NULL;
809 memset(ifmgd->bssid, 0, ETH_ALEN);
812 * we need to commit the associated = NULL change because the
813 * scan code uses that to determine whether this iface should
814 * go to/wake up from powersave or not -- and could otherwise
815 * wake the queues erroneously.
820 * Thus, we can only afterwards stop the queues -- to account
821 * for the case where another CPU is finishing a scan at this
822 * time -- we don't want the scan code to enable queues.
825 netif_tx_stop_all_queues(sdata->dev);
826 netif_carrier_off(sdata->dev);
829 sta = sta_info_get(sdata, bssid);
831 set_sta_flags(sta, WLAN_STA_DISASSOC);
832 ieee80211_sta_tear_down_BA_sessions(sta);
836 changed |= ieee80211_reset_erp_info(sdata);
838 ieee80211_led_assoc(local, 0);
839 changed |= BSS_CHANGED_ASSOC;
840 sdata->vif.bss_conf.assoc = false;
842 ieee80211_set_wmm_default(sdata);
844 /* channel(_type) changes are handled by ieee80211_hw_config */
845 local->oper_channel_type = NL80211_CHAN_NO_HT;
847 /* on the next assoc, re-program HT parameters */
848 sdata->ht_opmode_valid = false;
850 local->power_constr_level = 0;
852 del_timer_sync(&local->dynamic_ps_timer);
853 cancel_work_sync(&local->dynamic_ps_enable_work);
855 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
856 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
857 config_changed |= IEEE80211_CONF_CHANGE_PS;
860 ieee80211_hw_config(local, config_changed);
862 /* And the BSSID changed -- not very interesting here */
863 changed |= BSS_CHANGED_BSSID;
864 ieee80211_bss_info_change_notify(sdata, changed);
867 sta_info_destroy_addr(sdata, bssid);
870 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
871 struct ieee80211_hdr *hdr)
874 * We can postpone the mgd.timer whenever receiving unicast frames
875 * from AP because we know that the connection is working both ways
876 * at that time. But multicast frames (and hence also beacons) must
877 * be ignored here, because we need to trigger the timer during
878 * data idle periods for sending the periodic probe request to the
879 * AP we're connected to.
881 if (is_multicast_ether_addr(hdr->addr1))
884 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
887 mod_timer(&sdata->u.mgd.conn_mon_timer,
888 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
891 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
893 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
896 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
897 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
898 ssid + 2, ssid[1], NULL, 0);
900 ifmgd->probe_send_count++;
901 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
902 run_again(ifmgd, ifmgd->probe_timeout);
905 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
908 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
909 bool already = false;
911 if (!ieee80211_sdata_running(sdata))
914 if (sdata->local->scanning)
917 if (sdata->local->tmp_channel)
920 mutex_lock(&ifmgd->mtx);
922 if (!ifmgd->associated)
925 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
926 if (beacon && net_ratelimit())
927 printk(KERN_DEBUG "%s: detected beacon loss from AP "
928 "- sending probe request\n", sdata->name);
932 * The driver/our work has already reported this event or the
933 * connection monitoring has kicked in and we have already sent
934 * a probe request. Or maybe the AP died and the driver keeps
935 * reporting until we disassociate...
937 * In either case we have to ignore the current call to this
938 * function (except for setting the correct probe reason bit)
939 * because otherwise we would reset the timer every time and
940 * never check whether we received a probe response!
942 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
943 IEEE80211_STA_CONNECTION_POLL))
947 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
949 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
954 mutex_lock(&sdata->local->iflist_mtx);
955 ieee80211_recalc_ps(sdata->local, -1);
956 mutex_unlock(&sdata->local->iflist_mtx);
958 ifmgd->probe_send_count = 0;
959 ieee80211_mgd_probe_ap_send(sdata);
961 mutex_unlock(&ifmgd->mtx);
964 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
967 struct ieee80211_local *local = sdata->local;
970 mutex_lock(&ifmgd->mtx);
971 if (!ifmgd->associated) {
972 mutex_unlock(&ifmgd->mtx);
976 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
978 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
980 ieee80211_set_disassoc(sdata, true);
981 ieee80211_recalc_idle(local);
982 mutex_unlock(&ifmgd->mtx);
984 * must be outside lock due to cfg80211,
985 * but that's not a problem.
987 ieee80211_send_deauth_disassoc(sdata, bssid,
988 IEEE80211_STYPE_DEAUTH,
989 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
993 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
995 struct ieee80211_sub_if_data *sdata =
996 container_of(work, struct ieee80211_sub_if_data,
997 u.mgd.beacon_connection_loss_work);
999 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1000 __ieee80211_connection_loss(sdata);
1002 ieee80211_mgd_probe_ap(sdata, true);
1005 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1007 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1008 struct ieee80211_hw *hw = &sdata->local->hw;
1010 trace_api_beacon_loss(sdata);
1012 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1013 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1015 EXPORT_SYMBOL(ieee80211_beacon_loss);
1017 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1019 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1020 struct ieee80211_hw *hw = &sdata->local->hw;
1022 trace_api_connection_loss(sdata);
1024 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1025 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1027 EXPORT_SYMBOL(ieee80211_connection_loss);
1030 static enum rx_mgmt_action __must_check
1031 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1032 struct ieee80211_mgmt *mgmt, size_t len)
1034 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1035 const u8 *bssid = NULL;
1039 return RX_MGMT_NONE;
1041 ASSERT_MGD_MTX(ifmgd);
1043 bssid = ifmgd->associated->bssid;
1045 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1047 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1048 sdata->name, bssid, reason_code);
1050 ieee80211_set_disassoc(sdata, true);
1051 ieee80211_recalc_idle(sdata->local);
1053 return RX_MGMT_CFG80211_DEAUTH;
1057 static enum rx_mgmt_action __must_check
1058 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1059 struct ieee80211_mgmt *mgmt, size_t len)
1061 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1065 return RX_MGMT_NONE;
1067 ASSERT_MGD_MTX(ifmgd);
1069 if (WARN_ON(!ifmgd->associated))
1070 return RX_MGMT_NONE;
1072 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1073 return RX_MGMT_NONE;
1075 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1077 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1078 sdata->name, mgmt->sa, reason_code);
1080 ieee80211_set_disassoc(sdata, true);
1081 ieee80211_recalc_idle(sdata->local);
1082 return RX_MGMT_CFG80211_DISASSOC;
1086 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1087 struct ieee80211_mgmt *mgmt, size_t len)
1089 struct ieee80211_sub_if_data *sdata = wk->sdata;
1090 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1091 struct ieee80211_local *local = sdata->local;
1092 struct ieee80211_supported_band *sband;
1093 struct sta_info *sta;
1094 struct cfg80211_bss *cbss = wk->assoc.bss;
1096 u32 rates, basic_rates;
1097 u16 capab_info, aid;
1098 struct ieee802_11_elems elems;
1099 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1102 bool have_higher_than_11mbit = false;
1103 u16 ap_ht_cap_flags;
1105 /* AssocResp and ReassocResp have identical structure */
1107 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1108 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1110 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1111 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1112 "set\n", sdata->name, aid);
1113 aid &= ~(BIT(15) | BIT(14));
1115 pos = mgmt->u.assoc_resp.variable;
1116 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1118 if (!elems.supp_rates) {
1119 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1126 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
1128 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1129 " the AP\n", sdata->name);
1133 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1135 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1136 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1140 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1142 for (i = 0; i < elems.supp_rates_len; i++) {
1143 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1144 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1147 have_higher_than_11mbit = true;
1149 for (j = 0; j < sband->n_bitrates; j++) {
1150 if (sband->bitrates[j].bitrate == rate) {
1153 basic_rates |= BIT(j);
1159 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1160 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1161 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1164 have_higher_than_11mbit = true;
1166 for (j = 0; j < sband->n_bitrates; j++) {
1167 if (sband->bitrates[j].bitrate == rate) {
1170 basic_rates |= BIT(j);
1176 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1177 sdata->vif.bss_conf.basic_rates = basic_rates;
1179 /* cf. IEEE 802.11 9.2.12 */
1180 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1181 have_higher_than_11mbit)
1182 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1184 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1186 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1187 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1188 elems.ht_cap_elem, &sta->sta.ht_cap);
1190 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1192 rate_control_rate_init(sta);
1194 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1195 set_sta_flags(sta, WLAN_STA_MFP);
1197 if (elems.wmm_param)
1198 set_sta_flags(sta, WLAN_STA_WME);
1200 err = sta_info_insert(sta);
1203 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1204 " the AP (error %d)\n", sdata->name, err);
1208 if (elems.wmm_param)
1209 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1210 elems.wmm_param_len);
1212 ieee80211_set_wmm_default(sdata);
1214 local->oper_channel = wk->chan;
1216 if (elems.ht_info_elem && elems.wmm_param &&
1217 (sdata->local->hw.queues >= 4) &&
1218 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1219 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1220 cbss->bssid, ap_ht_cap_flags);
1222 /* set AID and assoc capability,
1223 * ieee80211_set_associated() will tell the driver */
1224 bss_conf->aid = aid;
1225 bss_conf->assoc_capability = capab_info;
1226 ieee80211_set_associated(sdata, cbss, changed);
1229 * If we're using 4-addr mode, let the AP know that we're
1230 * doing so, so that it can create the STA VLAN on its side
1232 if (ifmgd->use_4addr)
1233 ieee80211_send_4addr_nullfunc(local, sdata);
1236 * Start timer to probe the connection to the AP now.
1237 * Also start the timer that will detect beacon loss.
1239 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1240 mod_beacon_timer(sdata);
1246 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1247 struct ieee80211_mgmt *mgmt,
1249 struct ieee80211_rx_status *rx_status,
1250 struct ieee802_11_elems *elems,
1253 struct ieee80211_local *local = sdata->local;
1255 struct ieee80211_bss *bss;
1256 struct ieee80211_channel *channel;
1257 bool need_ps = false;
1259 if (sdata->u.mgd.associated) {
1260 bss = (void *)sdata->u.mgd.associated->priv;
1261 /* not previously set so we may need to recalc */
1262 need_ps = !bss->dtim_period;
1265 if (elems->ds_params && elems->ds_params_len == 1)
1266 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1268 freq = rx_status->freq;
1270 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1272 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1275 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1278 ieee80211_rx_bss_put(local, bss);
1280 if (!sdata->u.mgd.associated)
1284 mutex_lock(&local->iflist_mtx);
1285 ieee80211_recalc_ps(local, -1);
1286 mutex_unlock(&local->iflist_mtx);
1289 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1290 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1292 struct ieee80211_channel_sw_ie *sw_elem =
1293 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1294 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1299 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1300 struct sk_buff *skb)
1302 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1303 struct ieee80211_if_managed *ifmgd;
1304 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1305 size_t baselen, len = skb->len;
1306 struct ieee802_11_elems elems;
1308 ifmgd = &sdata->u.mgd;
1310 ASSERT_MGD_MTX(ifmgd);
1312 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1313 return; /* ignore ProbeResp to foreign address */
1315 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1319 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1322 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1324 if (ifmgd->associated &&
1325 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
1326 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1327 IEEE80211_STA_CONNECTION_POLL)) {
1328 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1329 IEEE80211_STA_BEACON_POLL);
1330 mutex_lock(&sdata->local->iflist_mtx);
1331 ieee80211_recalc_ps(sdata->local, -1);
1332 mutex_unlock(&sdata->local->iflist_mtx);
1334 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1338 * We've received a probe response, but are not sure whether
1339 * we have or will be receiving any beacons or data, so let's
1340 * schedule the timers again, just in case.
1342 mod_beacon_timer(sdata);
1344 mod_timer(&ifmgd->conn_mon_timer,
1345 round_jiffies_up(jiffies +
1346 IEEE80211_CONNECTION_IDLE_TIME));
1351 * This is the canonical list of information elements we care about,
1352 * the filter code also gives us all changes to the Microsoft OUI
1353 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1355 * We implement beacon filtering in software since that means we can
1356 * avoid processing the frame here and in cfg80211, and userspace
1357 * will not be able to tell whether the hardware supports it or not.
1359 * XXX: This list needs to be dynamic -- userspace needs to be able to
1360 * add items it requires. It also needs to be able to tell us to
1361 * look out for other vendor IEs.
1363 static const u64 care_about_ies =
1364 (1ULL << WLAN_EID_COUNTRY) |
1365 (1ULL << WLAN_EID_ERP_INFO) |
1366 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1367 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1368 (1ULL << WLAN_EID_HT_CAPABILITY) |
1369 (1ULL << WLAN_EID_HT_INFORMATION);
1371 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1372 struct ieee80211_mgmt *mgmt,
1374 struct ieee80211_rx_status *rx_status)
1376 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1377 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1379 struct ieee802_11_elems elems;
1380 struct ieee80211_local *local = sdata->local;
1382 bool erp_valid, directed_tim = false;
1387 ASSERT_MGD_MTX(ifmgd);
1389 /* Process beacon from the current BSS */
1390 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1394 if (rx_status->freq != local->hw.conf.channel->center_freq)
1398 * We might have received a number of frames, among them a
1399 * disassoc frame and a beacon...
1401 if (!ifmgd->associated)
1404 bssid = ifmgd->associated->bssid;
1407 * And in theory even frames from a different AP we were just
1408 * associated to a split-second ago!
1410 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1413 /* Track average RSSI from the Beacon frames of the current AP */
1414 ifmgd->last_beacon_signal = rx_status->signal;
1415 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1416 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1417 ifmgd->ave_beacon_signal = rx_status->signal;
1418 ifmgd->last_cqm_event_signal = 0;
1420 ifmgd->ave_beacon_signal =
1421 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1422 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1423 ifmgd->ave_beacon_signal) / 16;
1425 if (bss_conf->cqm_rssi_thold &&
1426 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1427 int sig = ifmgd->ave_beacon_signal / 16;
1428 int last_event = ifmgd->last_cqm_event_signal;
1429 int thold = bss_conf->cqm_rssi_thold;
1430 int hyst = bss_conf->cqm_rssi_hyst;
1432 (last_event == 0 || sig < last_event - hyst)) {
1433 ifmgd->last_cqm_event_signal = sig;
1434 ieee80211_cqm_rssi_notify(
1436 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1438 } else if (sig > thold &&
1439 (last_event == 0 || sig > last_event + hyst)) {
1440 ifmgd->last_cqm_event_signal = sig;
1441 ieee80211_cqm_rssi_notify(
1443 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1448 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1449 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1450 if (net_ratelimit()) {
1451 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1452 "to a received beacon\n", sdata->name);
1455 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1456 mutex_lock(&local->iflist_mtx);
1457 ieee80211_recalc_ps(local, -1);
1458 mutex_unlock(&local->iflist_mtx);
1462 * Push the beacon loss detection into the future since
1463 * we are processing a beacon from the AP just now.
1465 mod_beacon_timer(sdata);
1467 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1468 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1469 len - baselen, &elems,
1470 care_about_ies, ncrc);
1472 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1473 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1476 if (ncrc != ifmgd->beacon_crc) {
1477 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1480 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1481 elems.wmm_param_len);
1484 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1486 if (local->hw.conf.dynamic_ps_timeout > 0) {
1487 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1488 ieee80211_hw_config(local,
1489 IEEE80211_CONF_CHANGE_PS);
1490 ieee80211_send_nullfunc(local, sdata, 0);
1492 local->pspolling = true;
1495 * Here is assumed that the driver will be
1496 * able to send ps-poll frame and receive a
1497 * response even though power save mode is
1498 * enabled, but some drivers might require
1499 * to disable power save here. This needs
1500 * to be investigated.
1502 ieee80211_send_pspoll(local, sdata);
1507 if (ncrc == ifmgd->beacon_crc)
1509 ifmgd->beacon_crc = ncrc;
1511 if (elems.erp_info && elems.erp_info_len >= 1) {
1513 erp_value = elems.erp_info[0];
1517 changed |= ieee80211_handle_bss_capability(sdata,
1518 le16_to_cpu(mgmt->u.beacon.capab_info),
1519 erp_valid, erp_value);
1522 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1523 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1524 struct sta_info *sta;
1525 struct ieee80211_supported_band *sband;
1526 u16 ap_ht_cap_flags;
1530 sta = sta_info_get(sdata, bssid);
1531 if (WARN_ON(!sta)) {
1536 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1538 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1539 elems.ht_cap_elem, &sta->sta.ht_cap);
1541 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1545 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1546 bssid, ap_ht_cap_flags);
1549 /* Note: country IE parsing is done for us by cfg80211 */
1550 if (elems.country_elem) {
1551 /* TODO: IBSS also needs this */
1552 if (elems.pwr_constr_elem)
1553 ieee80211_handle_pwr_constr(sdata,
1554 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1555 elems.pwr_constr_elem,
1556 elems.pwr_constr_elem_len);
1559 ieee80211_bss_info_change_notify(sdata, changed);
1562 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1563 struct sk_buff *skb)
1565 struct ieee80211_local *local = sdata->local;
1566 struct ieee80211_mgmt *mgmt;
1570 return RX_DROP_MONITOR;
1572 mgmt = (struct ieee80211_mgmt *) skb->data;
1573 fc = le16_to_cpu(mgmt->frame_control);
1575 switch (fc & IEEE80211_FCTL_STYPE) {
1576 case IEEE80211_STYPE_PROBE_RESP:
1577 case IEEE80211_STYPE_BEACON:
1578 case IEEE80211_STYPE_DEAUTH:
1579 case IEEE80211_STYPE_DISASSOC:
1580 case IEEE80211_STYPE_ACTION:
1581 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1582 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1586 return RX_DROP_MONITOR;
1589 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1590 struct sk_buff *skb)
1592 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1593 struct ieee80211_rx_status *rx_status;
1594 struct ieee80211_mgmt *mgmt;
1595 enum rx_mgmt_action rma = RX_MGMT_NONE;
1598 rx_status = (struct ieee80211_rx_status *) skb->cb;
1599 mgmt = (struct ieee80211_mgmt *) skb->data;
1600 fc = le16_to_cpu(mgmt->frame_control);
1602 mutex_lock(&ifmgd->mtx);
1604 if (ifmgd->associated &&
1605 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1606 switch (fc & IEEE80211_FCTL_STYPE) {
1607 case IEEE80211_STYPE_BEACON:
1608 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1611 case IEEE80211_STYPE_PROBE_RESP:
1612 ieee80211_rx_mgmt_probe_resp(sdata, skb);
1614 case IEEE80211_STYPE_DEAUTH:
1615 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1617 case IEEE80211_STYPE_DISASSOC:
1618 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1620 case IEEE80211_STYPE_ACTION:
1621 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1624 ieee80211_sta_process_chanswitch(sdata,
1625 &mgmt->u.action.u.chan_switch.sw_elem,
1626 (void *)ifmgd->associated->priv);
1629 mutex_unlock(&ifmgd->mtx);
1635 case RX_MGMT_CFG80211_DEAUTH:
1636 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1638 case RX_MGMT_CFG80211_DISASSOC:
1639 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1642 WARN(1, "unexpected: %d", rma);
1647 mutex_unlock(&ifmgd->mtx);
1649 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
1650 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
1651 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1657 static void ieee80211_sta_timer(unsigned long data)
1659 struct ieee80211_sub_if_data *sdata =
1660 (struct ieee80211_sub_if_data *) data;
1661 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1662 struct ieee80211_local *local = sdata->local;
1664 if (local->quiescing) {
1665 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1669 ieee80211_queue_work(&local->hw, &ifmgd->work);
1672 static void ieee80211_sta_work(struct work_struct *work)
1674 struct ieee80211_sub_if_data *sdata =
1675 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1676 struct ieee80211_local *local = sdata->local;
1677 struct ieee80211_if_managed *ifmgd;
1678 struct sk_buff *skb;
1680 if (!ieee80211_sdata_running(sdata))
1683 if (local->scanning)
1686 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1690 * ieee80211_queue_work() should have picked up most cases,
1691 * here we'll pick the the rest.
1693 if (WARN(local->suspended, "STA MLME work scheduled while "
1694 "going to suspend\n"))
1697 ifmgd = &sdata->u.mgd;
1699 /* first process frames to avoid timing out while a frame is pending */
1700 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1701 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1703 /* then process the rest of the work */
1704 mutex_lock(&ifmgd->mtx);
1706 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1707 IEEE80211_STA_CONNECTION_POLL) &&
1708 ifmgd->associated) {
1711 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1712 if (time_is_after_jiffies(ifmgd->probe_timeout))
1713 run_again(ifmgd, ifmgd->probe_timeout);
1715 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1716 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1717 printk(KERN_DEBUG "No probe response from AP %pM"
1718 " after %dms, try %d\n", bssid,
1719 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1720 ifmgd->probe_send_count);
1722 ieee80211_mgd_probe_ap_send(sdata);
1725 * We actually lost the connection ... or did we?
1728 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1729 IEEE80211_STA_BEACON_POLL);
1730 printk(KERN_DEBUG "No probe response from AP %pM"
1731 " after %dms, disconnecting.\n",
1732 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
1733 ieee80211_set_disassoc(sdata, true);
1734 ieee80211_recalc_idle(local);
1735 mutex_unlock(&ifmgd->mtx);
1737 * must be outside lock due to cfg80211,
1738 * but that's not a problem.
1740 ieee80211_send_deauth_disassoc(sdata, bssid,
1741 IEEE80211_STYPE_DEAUTH,
1742 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1744 mutex_lock(&ifmgd->mtx);
1748 mutex_unlock(&ifmgd->mtx);
1751 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1753 struct ieee80211_sub_if_data *sdata =
1754 (struct ieee80211_sub_if_data *) data;
1755 struct ieee80211_local *local = sdata->local;
1757 if (local->quiescing)
1760 ieee80211_queue_work(&sdata->local->hw,
1761 &sdata->u.mgd.beacon_connection_loss_work);
1764 static void ieee80211_sta_conn_mon_timer(unsigned long data)
1766 struct ieee80211_sub_if_data *sdata =
1767 (struct ieee80211_sub_if_data *) data;
1768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1769 struct ieee80211_local *local = sdata->local;
1771 if (local->quiescing)
1774 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
1777 static void ieee80211_sta_monitor_work(struct work_struct *work)
1779 struct ieee80211_sub_if_data *sdata =
1780 container_of(work, struct ieee80211_sub_if_data,
1781 u.mgd.monitor_work);
1783 ieee80211_mgd_probe_ap(sdata, false);
1786 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1788 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1789 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1790 IEEE80211_STA_CONNECTION_POLL);
1792 /* let's probe the connection once */
1793 ieee80211_queue_work(&sdata->local->hw,
1794 &sdata->u.mgd.monitor_work);
1795 /* and do all the other regular work too */
1796 ieee80211_queue_work(&sdata->local->hw,
1797 &sdata->u.mgd.work);
1802 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1804 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1807 * we need to use atomic bitops for the running bits
1808 * only because both timers might fire at the same
1809 * time -- the code here is properly synchronised.
1812 cancel_work_sync(&ifmgd->work);
1813 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
1814 if (del_timer_sync(&ifmgd->timer))
1815 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1817 cancel_work_sync(&ifmgd->chswitch_work);
1818 if (del_timer_sync(&ifmgd->chswitch_timer))
1819 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1821 cancel_work_sync(&ifmgd->monitor_work);
1822 /* these will just be re-established on connection */
1823 del_timer_sync(&ifmgd->conn_mon_timer);
1824 del_timer_sync(&ifmgd->bcn_mon_timer);
1827 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1829 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1831 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1832 add_timer(&ifmgd->timer);
1833 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1834 add_timer(&ifmgd->chswitch_timer);
1838 /* interface setup */
1839 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1841 struct ieee80211_if_managed *ifmgd;
1843 ifmgd = &sdata->u.mgd;
1844 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1845 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
1846 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1847 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1848 ieee80211_beacon_connection_loss_work);
1849 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1850 (unsigned long) sdata);
1851 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1852 (unsigned long) sdata);
1853 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1854 (unsigned long) sdata);
1855 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1856 (unsigned long) sdata);
1857 skb_queue_head_init(&ifmgd->skb_queue);
1861 mutex_init(&ifmgd->mtx);
1863 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1864 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1866 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1869 /* scan finished notification */
1870 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1872 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1874 /* Restart STA timers */
1876 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1877 ieee80211_restart_sta_timer(sdata);
1881 int ieee80211_max_network_latency(struct notifier_block *nb,
1882 unsigned long data, void *dummy)
1884 s32 latency_usec = (s32) data;
1885 struct ieee80211_local *local =
1886 container_of(nb, struct ieee80211_local,
1887 network_latency_notifier);
1889 mutex_lock(&local->iflist_mtx);
1890 ieee80211_recalc_ps(local, latency_usec);
1891 mutex_unlock(&local->iflist_mtx);
1897 static enum work_done_result
1898 ieee80211_probe_auth_done(struct ieee80211_work *wk,
1899 struct sk_buff *skb)
1902 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1903 return WORK_DONE_DESTROY;
1906 if (wk->type == IEEE80211_WORK_AUTH) {
1907 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1908 return WORK_DONE_DESTROY;
1911 mutex_lock(&wk->sdata->u.mgd.mtx);
1912 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1913 mutex_unlock(&wk->sdata->u.mgd.mtx);
1915 wk->type = IEEE80211_WORK_AUTH;
1916 wk->probe_auth.tries = 0;
1917 return WORK_DONE_REQUEUE;
1920 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1921 struct cfg80211_auth_request *req)
1924 struct ieee80211_work *wk;
1927 if (req->local_state_change)
1928 return 0; /* no need to update mac80211 state */
1930 switch (req->auth_type) {
1931 case NL80211_AUTHTYPE_OPEN_SYSTEM:
1932 auth_alg = WLAN_AUTH_OPEN;
1934 case NL80211_AUTHTYPE_SHARED_KEY:
1935 auth_alg = WLAN_AUTH_SHARED_KEY;
1937 case NL80211_AUTHTYPE_FT:
1938 auth_alg = WLAN_AUTH_FT;
1940 case NL80211_AUTHTYPE_NETWORK_EAP:
1941 auth_alg = WLAN_AUTH_LEAP;
1947 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1951 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
1953 if (req->ie && req->ie_len) {
1954 memcpy(wk->ie, req->ie, req->ie_len);
1955 wk->ie_len = req->ie_len;
1958 if (req->key && req->key_len) {
1959 wk->probe_auth.key_len = req->key_len;
1960 wk->probe_auth.key_idx = req->key_idx;
1961 memcpy(wk->probe_auth.key, req->key, req->key_len);
1964 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
1965 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
1966 wk->probe_auth.ssid_len = ssid[1];
1968 wk->probe_auth.algorithm = auth_alg;
1969 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
1971 /* if we already have a probe, don't probe again */
1972 if (req->bss->proberesp_ies)
1973 wk->type = IEEE80211_WORK_AUTH;
1975 wk->type = IEEE80211_WORK_DIRECT_PROBE;
1976 wk->chan = req->bss->channel;
1978 wk->done = ieee80211_probe_auth_done;
1980 ieee80211_add_work(wk);
1984 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
1985 struct sk_buff *skb)
1987 struct ieee80211_mgmt *mgmt;
1991 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
1992 return WORK_DONE_DESTROY;
1995 mgmt = (void *)skb->data;
1996 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1998 if (status == WLAN_STATUS_SUCCESS) {
1999 mutex_lock(&wk->sdata->u.mgd.mtx);
2000 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2001 mutex_unlock(&wk->sdata->u.mgd.mtx);
2002 /* oops -- internal error -- send timeout for now */
2003 cfg80211_send_assoc_timeout(wk->sdata->dev,
2005 return WORK_DONE_DESTROY;
2007 mutex_unlock(&wk->sdata->u.mgd.mtx);
2010 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2011 return WORK_DONE_DESTROY;
2014 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2015 struct cfg80211_assoc_request *req)
2017 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2018 struct ieee80211_bss *bss = (void *)req->bss->priv;
2019 struct ieee80211_work *wk;
2023 mutex_lock(&ifmgd->mtx);
2024 if (ifmgd->associated) {
2025 if (!req->prev_bssid ||
2026 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2029 * We are already associated and the request was not a
2030 * reassociation request from the current BSS, so
2033 mutex_unlock(&ifmgd->mtx);
2037 /* Trying to reassociate - clear previous association state */
2038 ieee80211_set_disassoc(sdata, true);
2040 mutex_unlock(&ifmgd->mtx);
2042 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2046 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2047 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2049 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2050 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2051 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2052 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2053 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2056 if (req->ie && req->ie_len) {
2057 memcpy(wk->ie, req->ie, req->ie_len);
2058 wk->ie_len = req->ie_len;
2062 wk->assoc.bss = req->bss;
2064 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2066 /* new association always uses requested smps mode */
2067 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2068 if (ifmgd->powersave)
2069 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2071 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2073 ifmgd->ap_smps = ifmgd->req_smps;
2075 wk->assoc.smps = ifmgd->ap_smps;
2077 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2078 * We still associate in non-HT mode (11a/b/g) if any one of these
2079 * ciphers is configured as pairwise.
2080 * We can set this to true for non-11n hardware, that'll be checked
2081 * separately along with the peer capabilities.
2083 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2084 wk->assoc.capability = req->bss->capability;
2085 wk->assoc.wmm_used = bss->wmm_used;
2086 wk->assoc.supp_rates = bss->supp_rates;
2087 wk->assoc.supp_rates_len = bss->supp_rates_len;
2088 wk->assoc.ht_information_ie =
2089 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2091 if (bss->wmm_used && bss->uapsd_supported &&
2092 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2093 wk->assoc.uapsd_used = true;
2094 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2096 wk->assoc.uapsd_used = false;
2097 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2100 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2101 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2102 wk->assoc.ssid_len = ssid[1];
2104 if (req->prev_bssid)
2105 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2107 wk->type = IEEE80211_WORK_ASSOC;
2108 wk->chan = req->bss->channel;
2110 wk->done = ieee80211_assoc_done;
2113 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2114 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2116 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2117 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2120 if (req->crypto.control_port)
2121 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2123 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2125 ieee80211_add_work(wk);
2129 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2130 struct cfg80211_deauth_request *req,
2133 struct ieee80211_local *local = sdata->local;
2134 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2135 struct ieee80211_work *wk;
2136 const u8 *bssid = req->bss->bssid;
2138 mutex_lock(&ifmgd->mtx);
2140 if (ifmgd->associated == req->bss) {
2141 bssid = req->bss->bssid;
2142 ieee80211_set_disassoc(sdata, true);
2143 mutex_unlock(&ifmgd->mtx);
2145 bool not_auth_yet = false;
2147 mutex_unlock(&ifmgd->mtx);
2149 mutex_lock(&local->work_mtx);
2150 list_for_each_entry(wk, &local->work_list, list) {
2151 if (wk->sdata != sdata)
2154 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2155 wk->type != IEEE80211_WORK_AUTH)
2158 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2161 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2162 list_del_rcu(&wk->list);
2166 mutex_unlock(&local->work_mtx);
2169 * If somebody requests authentication and we haven't
2170 * sent out an auth frame yet there's no need to send
2171 * out a deauth frame either. If the state was PROBE,
2172 * then this is the case. If it's AUTH we have sent a
2173 * frame, and if it's IDLE we have completed the auth
2177 __cfg80211_auth_canceled(sdata->dev, bssid);
2182 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2183 sdata->name, bssid, req->reason_code);
2185 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2186 req->reason_code, cookie,
2187 !req->local_state_change);
2189 ieee80211_recalc_idle(sdata->local);
2194 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2195 struct cfg80211_disassoc_request *req,
2198 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2201 mutex_lock(&ifmgd->mtx);
2204 * cfg80211 should catch this ... but it's racy since
2205 * we can receive a disassoc frame, process it, hand it
2206 * to cfg80211 while that's in a locked section already
2207 * trying to tell us that the user wants to disconnect.
2209 if (ifmgd->associated != req->bss) {
2210 mutex_unlock(&ifmgd->mtx);
2214 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2215 sdata->name, req->bss->bssid, req->reason_code);
2217 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2218 ieee80211_set_disassoc(sdata, false);
2220 mutex_unlock(&ifmgd->mtx);
2222 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2223 IEEE80211_STYPE_DISASSOC, req->reason_code,
2224 cookie, !req->local_state_change);
2225 sta_info_destroy_addr(sdata, bssid);
2227 ieee80211_recalc_idle(sdata->local);
2232 int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
2233 struct ieee80211_channel *chan,
2234 enum nl80211_channel_type channel_type,
2235 const u8 *buf, size_t len, u64 *cookie)
2237 struct ieee80211_local *local = sdata->local;
2238 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2239 struct sk_buff *skb;
2241 /* Check that we are on the requested channel for transmission */
2242 if ((chan != local->tmp_channel ||
2243 channel_type != local->tmp_channel_type) &&
2244 (chan != local->oper_channel ||
2245 channel_type != local->oper_channel_type))
2248 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2251 skb_reserve(skb, local->hw.extra_tx_headroom);
2253 memcpy(skb_put(skb, len), buf, len);
2255 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
2256 IEEE80211_SKB_CB(skb)->flags |=
2257 IEEE80211_TX_INTFL_DONT_ENCRYPT;
2258 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2259 IEEE80211_TX_CTL_REQ_TX_STATUS;
2260 skb->dev = sdata->dev;
2261 ieee80211_tx_skb(sdata, skb);
2263 *cookie = (unsigned long) skb;
2267 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2268 enum nl80211_cqm_rssi_threshold_event rssi_event,
2271 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2273 trace_api_cqm_rssi_notify(sdata, rssi_event);
2275 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2277 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);