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 <linux/slab.h>
23 #include <net/mac80211.h>
24 #include <asm/unaligned.h>
26 #include "ieee80211_i.h"
27 #include "driver-ops.h"
31 #define IEEE80211_MAX_PROBE_TRIES 5
34 * beacon loss detection timeout
35 * XXX: should depend on beacon interval
37 #define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
39 * Time the connection can be idle before we probe
40 * it to see if we can still talk to the AP.
42 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
44 * Time we wait for a probe response after sending
45 * a probe request because of beacon loss or for
46 * checking the connection still works.
48 #define IEEE80211_PROBE_WAIT (HZ / 2)
51 * Weight given to the latest Beacon frame when calculating average signal
52 * strength for Beacon frames received in the current BSS. This must be
55 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
57 #define TMR_RUNNING_TIMER 0
58 #define TMR_RUNNING_CHANSW 1
61 * All cfg80211 functions have to be called outside a locked
62 * section so that they can acquire a lock themselves... This
63 * is much simpler than queuing up things in cfg80211, but we
64 * do need some indirection for that here.
67 /* no action required */
70 /* caller must call cfg80211_send_rx_auth() */
71 RX_MGMT_CFG80211_AUTH,
73 /* caller must call cfg80211_send_rx_assoc() */
74 RX_MGMT_CFG80211_ASSOC,
76 /* caller must call cfg80211_send_deauth() */
77 RX_MGMT_CFG80211_DEAUTH,
79 /* caller must call cfg80211_send_disassoc() */
80 RX_MGMT_CFG80211_DISASSOC,
82 /* caller must tell cfg80211 about internal error */
83 RX_MGMT_CFG80211_ASSOC_ERROR,
87 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
89 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
93 * We can have multiple work items (and connection probing)
94 * scheduling this timer, but we need to take care to only
95 * reschedule it when it should fire _earlier_ than it was
96 * asked for before, or if it's not pending right now. This
97 * function ensures that. Note that it then is required to
98 * run this function for all timeouts after the first one
99 * has happened -- the work that runs from this timer will
102 static void run_again(struct ieee80211_if_managed *ifmgd,
103 unsigned long timeout)
105 ASSERT_MGD_MTX(ifmgd);
107 if (!timer_pending(&ifmgd->timer) ||
108 time_before(timeout, ifmgd->timer.expires))
109 mod_timer(&ifmgd->timer, timeout);
112 static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
114 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
117 mod_timer(&sdata->u.mgd.bcn_mon_timer,
118 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
121 static int ecw2cw(int ecw)
123 return (1 << ecw) - 1;
127 * ieee80211_enable_ht should be called only after the operating band
128 * has been determined as ht configuration depends on the hw's
129 * HT abilities for a specific band.
131 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
132 struct ieee80211_ht_info *hti,
133 const u8 *bssid, u16 ap_ht_cap_flags)
135 struct ieee80211_local *local = sdata->local;
136 struct ieee80211_supported_band *sband;
137 struct sta_info *sta;
140 bool enable_ht = true, ht_changed;
141 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
143 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
145 /* HT is not supported */
146 if (!sband->ht_cap.ht_supported)
149 /* check that channel matches the right operating channel */
150 if (local->hw.conf.channel->center_freq !=
151 ieee80211_channel_to_frequency(hti->control_chan))
155 channel_type = NL80211_CHAN_HT20;
157 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
158 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
159 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
160 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
161 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
162 if (!(local->hw.conf.channel->flags &
163 IEEE80211_CHAN_NO_HT40PLUS))
164 channel_type = NL80211_CHAN_HT40PLUS;
166 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
167 if (!(local->hw.conf.channel->flags &
168 IEEE80211_CHAN_NO_HT40MINUS))
169 channel_type = NL80211_CHAN_HT40MINUS;
175 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
176 channel_type != local->hw.conf.channel_type;
178 local->oper_channel_type = channel_type;
181 /* channel_type change automatically detected */
182 ieee80211_hw_config(local, 0);
185 sta = sta_info_get(sdata, bssid);
187 rate_control_rate_update(local, sband, sta,
188 IEEE80211_RC_HT_CHANGED,
189 local->oper_channel_type);
197 ht_opmode = le16_to_cpu(hti->operation_mode);
199 /* if bss configuration changed store the new one */
200 if (!sdata->ht_opmode_valid ||
201 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
202 changed |= BSS_CHANGED_HT;
203 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
204 sdata->ht_opmode_valid = true;
210 /* frame sending functions */
212 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
213 const u8 *bssid, u16 stype, u16 reason,
214 void *cookie, bool send_frame)
216 struct ieee80211_local *local = sdata->local;
217 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
219 struct ieee80211_mgmt *mgmt;
221 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
223 printk(KERN_DEBUG "%s: failed to allocate buffer for "
224 "deauth/disassoc frame\n", sdata->name);
227 skb_reserve(skb, local->hw.extra_tx_headroom);
229 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
231 memcpy(mgmt->da, bssid, ETH_ALEN);
232 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
233 memcpy(mgmt->bssid, bssid, ETH_ALEN);
234 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
236 /* u.deauth.reason_code == u.disassoc.reason_code */
237 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
239 if (stype == IEEE80211_STYPE_DEAUTH)
241 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
243 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
246 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
248 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
249 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
250 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
253 ieee80211_tx_skb(sdata, skb);
258 void ieee80211_send_pspoll(struct ieee80211_local *local,
259 struct ieee80211_sub_if_data *sdata)
261 struct ieee80211_pspoll *pspoll;
264 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
268 pspoll = (struct ieee80211_pspoll *) skb->data;
269 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
271 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
272 ieee80211_tx_skb(sdata, skb);
275 void ieee80211_send_nullfunc(struct ieee80211_local *local,
276 struct ieee80211_sub_if_data *sdata,
280 struct ieee80211_hdr_3addr *nullfunc;
282 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
286 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
288 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
290 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
291 ieee80211_tx_skb(sdata, skb);
294 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
295 struct ieee80211_sub_if_data *sdata)
298 struct ieee80211_hdr *nullfunc;
301 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
304 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
306 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
307 "nullfunc frame\n", sdata->name);
310 skb_reserve(skb, local->hw.extra_tx_headroom);
312 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
313 memset(nullfunc, 0, 30);
314 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
315 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
316 nullfunc->frame_control = fc;
317 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
318 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
319 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
320 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
322 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
323 ieee80211_tx_skb(sdata, skb);
326 /* spectrum management related things */
327 static void ieee80211_chswitch_work(struct work_struct *work)
329 struct ieee80211_sub_if_data *sdata =
330 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
331 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
333 if (!ieee80211_sdata_running(sdata))
336 mutex_lock(&ifmgd->mtx);
337 if (!ifmgd->associated)
340 sdata->local->oper_channel = sdata->local->csa_channel;
341 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
343 /* XXX: shouldn't really modify cfg80211-owned data! */
344 ifmgd->associated->channel = sdata->local->oper_channel;
346 ieee80211_wake_queues_by_reason(&sdata->local->hw,
347 IEEE80211_QUEUE_STOP_REASON_CSA);
349 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
350 mutex_unlock(&ifmgd->mtx);
353 static void ieee80211_chswitch_timer(unsigned long data)
355 struct ieee80211_sub_if_data *sdata =
356 (struct ieee80211_sub_if_data *) data;
357 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
359 if (sdata->local->quiescing) {
360 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
364 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
367 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
368 struct ieee80211_channel_sw_ie *sw_elem,
369 struct ieee80211_bss *bss)
371 struct cfg80211_bss *cbss =
372 container_of((void *)bss, struct cfg80211_bss, priv);
373 struct ieee80211_channel *new_ch;
374 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
375 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
377 ASSERT_MGD_MTX(ifmgd);
379 if (!ifmgd->associated)
382 if (sdata->local->scanning)
385 /* Disregard subsequent beacons if we are already running a timer
388 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
391 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
392 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
395 sdata->local->csa_channel = new_ch;
397 if (sw_elem->count <= 1) {
398 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
400 ieee80211_stop_queues_by_reason(&sdata->local->hw,
401 IEEE80211_QUEUE_STOP_REASON_CSA);
402 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
403 mod_timer(&ifmgd->chswitch_timer,
405 msecs_to_jiffies(sw_elem->count *
406 cbss->beacon_interval));
410 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
411 u16 capab_info, u8 *pwr_constr_elem,
412 u8 pwr_constr_elem_len)
414 struct ieee80211_conf *conf = &sdata->local->hw.conf;
416 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
419 /* Power constraint IE length should be 1 octet */
420 if (pwr_constr_elem_len != 1)
423 if ((*pwr_constr_elem <= conf->channel->max_power) &&
424 (*pwr_constr_elem != sdata->local->power_constr_level)) {
425 sdata->local->power_constr_level = *pwr_constr_elem;
426 ieee80211_hw_config(sdata->local, 0);
431 static void ieee80211_enable_ps(struct ieee80211_local *local,
432 struct ieee80211_sub_if_data *sdata)
434 struct ieee80211_conf *conf = &local->hw.conf;
437 * If we are scanning right now then the parameters will
438 * take effect when scan finishes.
443 if (conf->dynamic_ps_timeout > 0 &&
444 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
445 mod_timer(&local->dynamic_ps_timer, jiffies +
446 msecs_to_jiffies(conf->dynamic_ps_timeout));
448 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
449 ieee80211_send_nullfunc(local, sdata, 1);
451 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
452 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
455 conf->flags |= IEEE80211_CONF_PS;
456 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
460 static void ieee80211_change_ps(struct ieee80211_local *local)
462 struct ieee80211_conf *conf = &local->hw.conf;
464 if (local->ps_sdata) {
465 ieee80211_enable_ps(local, local->ps_sdata);
466 } else if (conf->flags & IEEE80211_CONF_PS) {
467 conf->flags &= ~IEEE80211_CONF_PS;
468 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
469 del_timer_sync(&local->dynamic_ps_timer);
470 cancel_work_sync(&local->dynamic_ps_enable_work);
474 /* need to hold RTNL or interface lock */
475 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
477 struct ieee80211_sub_if_data *sdata, *found = NULL;
480 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
481 local->ps_sdata = NULL;
485 if (!list_empty(&local->work_list)) {
486 local->ps_sdata = NULL;
490 list_for_each_entry(sdata, &local->interfaces, list) {
491 if (!ieee80211_sdata_running(sdata))
493 if (sdata->vif.type != NL80211_IFTYPE_STATION)
499 if (count == 1 && found->u.mgd.powersave &&
500 found->u.mgd.associated &&
501 found->u.mgd.associated->beacon_ies &&
502 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
503 IEEE80211_STA_CONNECTION_POLL))) {
507 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
509 beaconint_us = ieee80211_tu_to_usec(
510 found->vif.bss_conf.beacon_int);
512 if (beaconint_us > latency) {
513 local->ps_sdata = NULL;
515 struct ieee80211_bss *bss;
519 bss = (void *)found->u.mgd.associated->priv;
520 dtimper = bss->dtim_period;
522 /* If the TIM IE is invalid, pretend the value is 1 */
525 else if (dtimper > 1)
526 maxslp = min_t(int, dtimper,
527 latency / beaconint_us);
529 local->hw.conf.max_sleep_period = maxslp;
530 local->hw.conf.ps_dtim_period = dtimper;
531 local->ps_sdata = found;
534 local->ps_sdata = NULL;
538 ieee80211_change_ps(local);
541 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
543 struct ieee80211_local *local =
544 container_of(work, struct ieee80211_local,
545 dynamic_ps_disable_work);
547 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
548 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
549 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
552 ieee80211_wake_queues_by_reason(&local->hw,
553 IEEE80211_QUEUE_STOP_REASON_PS);
556 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
558 struct ieee80211_local *local =
559 container_of(work, struct ieee80211_local,
560 dynamic_ps_enable_work);
561 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
562 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
564 /* can only happen when PS was just disabled anyway */
568 if (local->hw.conf.flags & IEEE80211_CONF_PS)
571 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
572 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
573 ieee80211_send_nullfunc(local, sdata, 1);
575 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
576 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
577 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
578 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
579 local->hw.conf.flags |= IEEE80211_CONF_PS;
580 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
584 void ieee80211_dynamic_ps_timer(unsigned long data)
586 struct ieee80211_local *local = (void *) data;
588 if (local->quiescing || local->suspended)
591 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
595 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
596 struct ieee80211_if_managed *ifmgd,
597 u8 *wmm_param, size_t wmm_param_len)
599 struct ieee80211_tx_queue_params params;
602 u8 *pos, uapsd_queues = 0;
604 if (!local->ops->conf_tx)
607 if (local->hw.queues < 4)
613 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
616 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
617 uapsd_queues = local->uapsd_queues;
619 count = wmm_param[6] & 0x0f;
620 if (count == ifmgd->wmm_last_param_set)
622 ifmgd->wmm_last_param_set = count;
625 left = wmm_param_len - 8;
627 memset(¶ms, 0, sizeof(params));
630 for (; left >= 4; left -= 4, pos += 4) {
631 int aci = (pos[0] >> 5) & 0x03;
632 int acm = (pos[0] >> 4) & 0x01;
640 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
641 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
647 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
648 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
654 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
655 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
662 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
663 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
668 params.aifs = pos[0] & 0x0f;
669 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
670 params.cw_min = ecw2cw(pos[1] & 0x0f);
671 params.txop = get_unaligned_le16(pos + 2);
672 params.uapsd = uapsd;
674 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
675 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
676 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
677 wiphy_name(local->hw.wiphy), queue, aci, acm,
678 params.aifs, params.cw_min, params.cw_max, params.txop,
681 if (drv_conf_tx(local, queue, ¶ms))
682 printk(KERN_DEBUG "%s: failed to set TX queue "
683 "parameters for queue %d\n",
684 wiphy_name(local->hw.wiphy), queue);
687 /* enable WMM or activate new settings */
688 local->hw.conf.flags |= IEEE80211_CONF_QOS;
689 drv_config(local, IEEE80211_CONF_CHANGE_QOS);
692 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
693 u16 capab, bool erp_valid, u8 erp)
695 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
698 bool use_short_preamble;
702 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
703 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
705 use_protection = false;
706 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
709 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
710 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
711 use_short_slot = true;
713 if (use_protection != bss_conf->use_cts_prot) {
714 bss_conf->use_cts_prot = use_protection;
715 changed |= BSS_CHANGED_ERP_CTS_PROT;
718 if (use_short_preamble != bss_conf->use_short_preamble) {
719 bss_conf->use_short_preamble = use_short_preamble;
720 changed |= BSS_CHANGED_ERP_PREAMBLE;
723 if (use_short_slot != bss_conf->use_short_slot) {
724 bss_conf->use_short_slot = use_short_slot;
725 changed |= BSS_CHANGED_ERP_SLOT;
731 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
732 struct cfg80211_bss *cbss,
733 u32 bss_info_changed)
735 struct ieee80211_bss *bss = (void *)cbss->priv;
736 struct ieee80211_local *local = sdata->local;
738 bss_info_changed |= BSS_CHANGED_ASSOC;
739 /* set timing information */
740 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
741 sdata->vif.bss_conf.timestamp = cbss->tsf;
743 bss_info_changed |= BSS_CHANGED_BEACON_INT;
744 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
745 cbss->capability, bss->has_erp_value, bss->erp_value);
747 sdata->u.mgd.associated = cbss;
748 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
750 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
752 /* just to be sure */
753 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
754 IEEE80211_STA_BEACON_POLL);
757 * Always handle WMM once after association regardless
758 * of the first value the AP uses. Setting -1 here has
759 * that effect because the AP values is an unsigned
762 sdata->u.mgd.wmm_last_param_set = -1;
764 ieee80211_led_assoc(local, 1);
766 sdata->vif.bss_conf.assoc = 1;
768 * For now just always ask the driver to update the basic rateset
769 * when we have associated, we aren't checking whether it actually
772 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
774 /* And the BSSID changed - we're associated now */
775 bss_info_changed |= BSS_CHANGED_BSSID;
777 /* Tell the driver to monitor connection quality (if supported) */
778 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
779 sdata->vif.bss_conf.cqm_rssi_thold)
780 bss_info_changed |= BSS_CHANGED_CQM;
782 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
784 mutex_lock(&local->iflist_mtx);
785 ieee80211_recalc_ps(local, -1);
786 ieee80211_recalc_smps(local, sdata);
787 mutex_unlock(&local->iflist_mtx);
789 netif_tx_start_all_queues(sdata->dev);
790 netif_carrier_on(sdata->dev);
793 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
797 struct ieee80211_local *local = sdata->local;
798 struct sta_info *sta;
799 u32 changed = 0, config_changed = 0;
802 ASSERT_MGD_MTX(ifmgd);
804 if (WARN_ON(!ifmgd->associated))
807 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
809 ifmgd->associated = NULL;
810 memset(ifmgd->bssid, 0, ETH_ALEN);
813 * we need to commit the associated = NULL change because the
814 * scan code uses that to determine whether this iface should
815 * go to/wake up from powersave or not -- and could otherwise
816 * wake the queues erroneously.
821 * Thus, we can only afterwards stop the queues -- to account
822 * for the case where another CPU is finishing a scan at this
823 * time -- we don't want the scan code to enable queues.
826 netif_tx_stop_all_queues(sdata->dev);
827 netif_carrier_off(sdata->dev);
830 sta = sta_info_get(sdata, bssid);
832 set_sta_flags(sta, WLAN_STA_DISASSOC);
833 ieee80211_sta_tear_down_BA_sessions(sta);
837 changed |= ieee80211_reset_erp_info(sdata);
839 ieee80211_led_assoc(local, 0);
840 changed |= BSS_CHANGED_ASSOC;
841 sdata->vif.bss_conf.assoc = false;
843 ieee80211_set_wmm_default(sdata);
845 /* channel(_type) changes are handled by ieee80211_hw_config */
846 local->oper_channel_type = NL80211_CHAN_NO_HT;
848 /* on the next assoc, re-program HT parameters */
849 sdata->ht_opmode_valid = false;
851 local->power_constr_level = 0;
853 del_timer_sync(&local->dynamic_ps_timer);
854 cancel_work_sync(&local->dynamic_ps_enable_work);
856 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
857 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
858 config_changed |= IEEE80211_CONF_CHANGE_PS;
861 ieee80211_hw_config(local, config_changed);
863 /* And the BSSID changed -- not very interesting here */
864 changed |= BSS_CHANGED_BSSID;
865 ieee80211_bss_info_change_notify(sdata, changed);
868 sta_info_destroy_addr(sdata, bssid);
871 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
872 struct ieee80211_hdr *hdr)
875 * We can postpone the mgd.timer whenever receiving unicast frames
876 * from AP because we know that the connection is working both ways
877 * at that time. But multicast frames (and hence also beacons) must
878 * be ignored here, because we need to trigger the timer during
879 * data idle periods for sending the periodic probe request to the
880 * AP we're connected to.
882 if (is_multicast_ether_addr(hdr->addr1))
885 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
888 mod_timer(&sdata->u.mgd.conn_mon_timer,
889 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
892 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
894 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
897 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
898 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
899 ssid + 2, ssid[1], NULL, 0);
901 ifmgd->probe_send_count++;
902 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
903 run_again(ifmgd, ifmgd->probe_timeout);
906 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
909 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
910 bool already = false;
912 if (!ieee80211_sdata_running(sdata))
915 if (sdata->local->scanning)
918 if (sdata->local->tmp_channel)
921 mutex_lock(&ifmgd->mtx);
923 if (!ifmgd->associated)
926 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
927 if (beacon && net_ratelimit())
928 printk(KERN_DEBUG "%s: detected beacon loss from AP "
929 "- sending probe request\n", sdata->name);
933 * The driver/our work has already reported this event or the
934 * connection monitoring has kicked in and we have already sent
935 * a probe request. Or maybe the AP died and the driver keeps
936 * reporting until we disassociate...
938 * In either case we have to ignore the current call to this
939 * function (except for setting the correct probe reason bit)
940 * because otherwise we would reset the timer every time and
941 * never check whether we received a probe response!
943 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
944 IEEE80211_STA_CONNECTION_POLL))
948 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
950 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
955 mutex_lock(&sdata->local->iflist_mtx);
956 ieee80211_recalc_ps(sdata->local, -1);
957 mutex_unlock(&sdata->local->iflist_mtx);
959 ifmgd->probe_send_count = 0;
960 ieee80211_mgd_probe_ap_send(sdata);
962 mutex_unlock(&ifmgd->mtx);
965 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
967 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
968 struct ieee80211_local *local = sdata->local;
971 mutex_lock(&ifmgd->mtx);
972 if (!ifmgd->associated) {
973 mutex_unlock(&ifmgd->mtx);
977 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
979 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
981 ieee80211_set_disassoc(sdata, true);
982 ieee80211_recalc_idle(local);
983 mutex_unlock(&ifmgd->mtx);
985 * must be outside lock due to cfg80211,
986 * but that's not a problem.
988 ieee80211_send_deauth_disassoc(sdata, bssid,
989 IEEE80211_STYPE_DEAUTH,
990 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
994 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
996 struct ieee80211_sub_if_data *sdata =
997 container_of(work, struct ieee80211_sub_if_data,
998 u.mgd.beacon_connection_loss_work);
1000 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1001 __ieee80211_connection_loss(sdata);
1003 ieee80211_mgd_probe_ap(sdata, true);
1006 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1008 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1009 struct ieee80211_hw *hw = &sdata->local->hw;
1011 trace_api_beacon_loss(sdata);
1013 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1014 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1016 EXPORT_SYMBOL(ieee80211_beacon_loss);
1018 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1020 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1021 struct ieee80211_hw *hw = &sdata->local->hw;
1023 trace_api_connection_loss(sdata);
1025 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1026 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1028 EXPORT_SYMBOL(ieee80211_connection_loss);
1031 static enum rx_mgmt_action __must_check
1032 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1033 struct ieee80211_mgmt *mgmt, size_t len)
1035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1036 const u8 *bssid = NULL;
1040 return RX_MGMT_NONE;
1042 ASSERT_MGD_MTX(ifmgd);
1044 bssid = ifmgd->associated->bssid;
1046 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1048 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1049 sdata->name, bssid, reason_code);
1051 ieee80211_set_disassoc(sdata, true);
1052 ieee80211_recalc_idle(sdata->local);
1054 return RX_MGMT_CFG80211_DEAUTH;
1058 static enum rx_mgmt_action __must_check
1059 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1060 struct ieee80211_mgmt *mgmt, size_t len)
1062 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1066 return RX_MGMT_NONE;
1068 ASSERT_MGD_MTX(ifmgd);
1070 if (WARN_ON(!ifmgd->associated))
1071 return RX_MGMT_NONE;
1073 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1074 return RX_MGMT_NONE;
1076 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1078 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1079 sdata->name, mgmt->sa, reason_code);
1081 ieee80211_set_disassoc(sdata, true);
1082 ieee80211_recalc_idle(sdata->local);
1083 return RX_MGMT_CFG80211_DISASSOC;
1087 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1088 struct ieee80211_mgmt *mgmt, size_t len)
1090 struct ieee80211_sub_if_data *sdata = wk->sdata;
1091 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1092 struct ieee80211_local *local = sdata->local;
1093 struct ieee80211_supported_band *sband;
1094 struct sta_info *sta;
1095 struct cfg80211_bss *cbss = wk->assoc.bss;
1097 u32 rates, basic_rates;
1098 u16 capab_info, aid;
1099 struct ieee802_11_elems elems;
1100 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1103 bool have_higher_than_11mbit = false;
1104 u16 ap_ht_cap_flags;
1106 /* AssocResp and ReassocResp have identical structure */
1108 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1109 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1111 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1112 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1113 "set\n", sdata->name, aid);
1114 aid &= ~(BIT(15) | BIT(14));
1116 pos = mgmt->u.assoc_resp.variable;
1117 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1119 if (!elems.supp_rates) {
1120 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1127 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
1129 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1130 " the AP\n", sdata->name);
1134 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1136 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1137 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1141 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1143 for (i = 0; i < elems.supp_rates_len; i++) {
1144 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1145 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1148 have_higher_than_11mbit = true;
1150 for (j = 0; j < sband->n_bitrates; j++) {
1151 if (sband->bitrates[j].bitrate == rate) {
1154 basic_rates |= BIT(j);
1160 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1161 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1162 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1165 have_higher_than_11mbit = true;
1167 for (j = 0; j < sband->n_bitrates; j++) {
1168 if (sband->bitrates[j].bitrate == rate) {
1171 basic_rates |= BIT(j);
1177 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1178 sdata->vif.bss_conf.basic_rates = basic_rates;
1180 /* cf. IEEE 802.11 9.2.12 */
1181 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1182 have_higher_than_11mbit)
1183 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1185 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1187 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1188 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1189 elems.ht_cap_elem, &sta->sta.ht_cap);
1191 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1193 rate_control_rate_init(sta);
1195 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1196 set_sta_flags(sta, WLAN_STA_MFP);
1198 if (elems.wmm_param)
1199 set_sta_flags(sta, WLAN_STA_WME);
1201 err = sta_info_insert(sta);
1204 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1205 " the AP (error %d)\n", sdata->name, err);
1209 if (elems.wmm_param)
1210 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1211 elems.wmm_param_len);
1213 ieee80211_set_wmm_default(sdata);
1215 local->oper_channel = wk->chan;
1217 if (elems.ht_info_elem && elems.wmm_param &&
1218 (sdata->local->hw.queues >= 4) &&
1219 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1220 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1221 cbss->bssid, ap_ht_cap_flags);
1223 /* set AID and assoc capability,
1224 * ieee80211_set_associated() will tell the driver */
1225 bss_conf->aid = aid;
1226 bss_conf->assoc_capability = capab_info;
1227 ieee80211_set_associated(sdata, cbss, changed);
1230 * If we're using 4-addr mode, let the AP know that we're
1231 * doing so, so that it can create the STA VLAN on its side
1233 if (ifmgd->use_4addr)
1234 ieee80211_send_4addr_nullfunc(local, sdata);
1237 * Start timer to probe the connection to the AP now.
1238 * Also start the timer that will detect beacon loss.
1240 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1241 mod_beacon_timer(sdata);
1247 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1248 struct ieee80211_mgmt *mgmt,
1250 struct ieee80211_rx_status *rx_status,
1251 struct ieee802_11_elems *elems,
1254 struct ieee80211_local *local = sdata->local;
1256 struct ieee80211_bss *bss;
1257 struct ieee80211_channel *channel;
1258 bool need_ps = false;
1260 if (sdata->u.mgd.associated) {
1261 bss = (void *)sdata->u.mgd.associated->priv;
1262 /* not previously set so we may need to recalc */
1263 need_ps = !bss->dtim_period;
1266 if (elems->ds_params && elems->ds_params_len == 1)
1267 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1269 freq = rx_status->freq;
1271 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1273 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1276 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1279 ieee80211_rx_bss_put(local, bss);
1281 if (!sdata->u.mgd.associated)
1285 mutex_lock(&local->iflist_mtx);
1286 ieee80211_recalc_ps(local, -1);
1287 mutex_unlock(&local->iflist_mtx);
1290 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1291 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1293 struct ieee80211_channel_sw_ie *sw_elem =
1294 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1295 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1300 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1301 struct sk_buff *skb)
1303 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1304 struct ieee80211_if_managed *ifmgd;
1305 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1306 size_t baselen, len = skb->len;
1307 struct ieee802_11_elems elems;
1309 ifmgd = &sdata->u.mgd;
1311 ASSERT_MGD_MTX(ifmgd);
1313 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1314 return; /* ignore ProbeResp to foreign address */
1316 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1320 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1323 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1325 if (ifmgd->associated &&
1326 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
1327 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1328 IEEE80211_STA_CONNECTION_POLL)) {
1329 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1330 IEEE80211_STA_BEACON_POLL);
1331 mutex_lock(&sdata->local->iflist_mtx);
1332 ieee80211_recalc_ps(sdata->local, -1);
1333 mutex_unlock(&sdata->local->iflist_mtx);
1335 * We've received a probe response, but are not sure whether
1336 * we have or will be receiving any beacons or data, so let's
1337 * schedule the timers again, just in case.
1339 mod_beacon_timer(sdata);
1340 mod_timer(&ifmgd->conn_mon_timer,
1341 round_jiffies_up(jiffies +
1342 IEEE80211_CONNECTION_IDLE_TIME));
1347 * This is the canonical list of information elements we care about,
1348 * the filter code also gives us all changes to the Microsoft OUI
1349 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1351 * We implement beacon filtering in software since that means we can
1352 * avoid processing the frame here and in cfg80211, and userspace
1353 * will not be able to tell whether the hardware supports it or not.
1355 * XXX: This list needs to be dynamic -- userspace needs to be able to
1356 * add items it requires. It also needs to be able to tell us to
1357 * look out for other vendor IEs.
1359 static const u64 care_about_ies =
1360 (1ULL << WLAN_EID_COUNTRY) |
1361 (1ULL << WLAN_EID_ERP_INFO) |
1362 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1363 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1364 (1ULL << WLAN_EID_HT_CAPABILITY) |
1365 (1ULL << WLAN_EID_HT_INFORMATION);
1367 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1368 struct ieee80211_mgmt *mgmt,
1370 struct ieee80211_rx_status *rx_status)
1372 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1373 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1375 struct ieee802_11_elems elems;
1376 struct ieee80211_local *local = sdata->local;
1378 bool erp_valid, directed_tim = false;
1383 ASSERT_MGD_MTX(ifmgd);
1385 /* Process beacon from the current BSS */
1386 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1390 if (rx_status->freq != local->hw.conf.channel->center_freq)
1394 * We might have received a number of frames, among them a
1395 * disassoc frame and a beacon...
1397 if (!ifmgd->associated)
1400 bssid = ifmgd->associated->bssid;
1403 * And in theory even frames from a different AP we were just
1404 * associated to a split-second ago!
1406 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1409 /* Track average RSSI from the Beacon frames of the current AP */
1410 ifmgd->last_beacon_signal = rx_status->signal;
1411 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1412 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1413 ifmgd->ave_beacon_signal = rx_status->signal;
1414 ifmgd->last_cqm_event_signal = 0;
1416 ifmgd->ave_beacon_signal =
1417 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1418 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1419 ifmgd->ave_beacon_signal) / 16;
1421 if (bss_conf->cqm_rssi_thold &&
1422 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1423 int sig = ifmgd->ave_beacon_signal / 16;
1424 int last_event = ifmgd->last_cqm_event_signal;
1425 int thold = bss_conf->cqm_rssi_thold;
1426 int hyst = bss_conf->cqm_rssi_hyst;
1428 (last_event == 0 || sig < last_event - hyst)) {
1429 ifmgd->last_cqm_event_signal = sig;
1430 ieee80211_cqm_rssi_notify(
1432 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1434 } else if (sig > thold &&
1435 (last_event == 0 || sig > last_event + hyst)) {
1436 ifmgd->last_cqm_event_signal = sig;
1437 ieee80211_cqm_rssi_notify(
1439 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1444 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1445 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1446 if (net_ratelimit()) {
1447 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1448 "to a received beacon\n", sdata->name);
1451 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1452 mutex_lock(&local->iflist_mtx);
1453 ieee80211_recalc_ps(local, -1);
1454 mutex_unlock(&local->iflist_mtx);
1458 * Push the beacon loss detection into the future since
1459 * we are processing a beacon from the AP just now.
1461 mod_beacon_timer(sdata);
1463 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1464 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1465 len - baselen, &elems,
1466 care_about_ies, ncrc);
1468 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1469 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1472 if (ncrc != ifmgd->beacon_crc) {
1473 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1476 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1477 elems.wmm_param_len);
1480 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1482 if (local->hw.conf.dynamic_ps_timeout > 0) {
1483 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1484 ieee80211_hw_config(local,
1485 IEEE80211_CONF_CHANGE_PS);
1486 ieee80211_send_nullfunc(local, sdata, 0);
1488 local->pspolling = true;
1491 * Here is assumed that the driver will be
1492 * able to send ps-poll frame and receive a
1493 * response even though power save mode is
1494 * enabled, but some drivers might require
1495 * to disable power save here. This needs
1496 * to be investigated.
1498 ieee80211_send_pspoll(local, sdata);
1503 if (ncrc == ifmgd->beacon_crc)
1505 ifmgd->beacon_crc = ncrc;
1507 if (elems.erp_info && elems.erp_info_len >= 1) {
1509 erp_value = elems.erp_info[0];
1513 changed |= ieee80211_handle_bss_capability(sdata,
1514 le16_to_cpu(mgmt->u.beacon.capab_info),
1515 erp_valid, erp_value);
1518 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1519 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1520 struct sta_info *sta;
1521 struct ieee80211_supported_band *sband;
1522 u16 ap_ht_cap_flags;
1526 sta = sta_info_get(sdata, bssid);
1527 if (WARN_ON(!sta)) {
1532 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1534 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1535 elems.ht_cap_elem, &sta->sta.ht_cap);
1537 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1541 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1542 bssid, ap_ht_cap_flags);
1545 /* Note: country IE parsing is done for us by cfg80211 */
1546 if (elems.country_elem) {
1547 /* TODO: IBSS also needs this */
1548 if (elems.pwr_constr_elem)
1549 ieee80211_handle_pwr_constr(sdata,
1550 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1551 elems.pwr_constr_elem,
1552 elems.pwr_constr_elem_len);
1555 ieee80211_bss_info_change_notify(sdata, changed);
1558 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1559 struct sk_buff *skb)
1561 struct ieee80211_local *local = sdata->local;
1562 struct ieee80211_mgmt *mgmt;
1566 return RX_DROP_MONITOR;
1568 mgmt = (struct ieee80211_mgmt *) skb->data;
1569 fc = le16_to_cpu(mgmt->frame_control);
1571 switch (fc & IEEE80211_FCTL_STYPE) {
1572 case IEEE80211_STYPE_PROBE_RESP:
1573 case IEEE80211_STYPE_BEACON:
1574 case IEEE80211_STYPE_DEAUTH:
1575 case IEEE80211_STYPE_DISASSOC:
1576 case IEEE80211_STYPE_ACTION:
1577 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1578 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1582 return RX_DROP_MONITOR;
1585 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1586 struct sk_buff *skb)
1588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1589 struct ieee80211_rx_status *rx_status;
1590 struct ieee80211_mgmt *mgmt;
1591 enum rx_mgmt_action rma = RX_MGMT_NONE;
1594 rx_status = (struct ieee80211_rx_status *) skb->cb;
1595 mgmt = (struct ieee80211_mgmt *) skb->data;
1596 fc = le16_to_cpu(mgmt->frame_control);
1598 mutex_lock(&ifmgd->mtx);
1600 if (ifmgd->associated &&
1601 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1602 switch (fc & IEEE80211_FCTL_STYPE) {
1603 case IEEE80211_STYPE_BEACON:
1604 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1607 case IEEE80211_STYPE_PROBE_RESP:
1608 ieee80211_rx_mgmt_probe_resp(sdata, skb);
1610 case IEEE80211_STYPE_DEAUTH:
1611 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1613 case IEEE80211_STYPE_DISASSOC:
1614 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1616 case IEEE80211_STYPE_ACTION:
1617 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1620 ieee80211_sta_process_chanswitch(sdata,
1621 &mgmt->u.action.u.chan_switch.sw_elem,
1622 (void *)ifmgd->associated->priv);
1625 mutex_unlock(&ifmgd->mtx);
1631 case RX_MGMT_CFG80211_DEAUTH:
1632 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1634 case RX_MGMT_CFG80211_DISASSOC:
1635 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1638 WARN(1, "unexpected: %d", rma);
1643 mutex_unlock(&ifmgd->mtx);
1645 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
1646 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
1647 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1653 static void ieee80211_sta_timer(unsigned long data)
1655 struct ieee80211_sub_if_data *sdata =
1656 (struct ieee80211_sub_if_data *) data;
1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1658 struct ieee80211_local *local = sdata->local;
1660 if (local->quiescing) {
1661 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1665 ieee80211_queue_work(&local->hw, &ifmgd->work);
1668 static void ieee80211_sta_work(struct work_struct *work)
1670 struct ieee80211_sub_if_data *sdata =
1671 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1672 struct ieee80211_local *local = sdata->local;
1673 struct ieee80211_if_managed *ifmgd;
1674 struct sk_buff *skb;
1676 if (!ieee80211_sdata_running(sdata))
1679 if (local->scanning)
1682 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1686 * ieee80211_queue_work() should have picked up most cases,
1687 * here we'll pick the the rest.
1689 if (WARN(local->suspended, "STA MLME work scheduled while "
1690 "going to suspend\n"))
1693 ifmgd = &sdata->u.mgd;
1695 /* first process frames to avoid timing out while a frame is pending */
1696 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1697 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1699 /* then process the rest of the work */
1700 mutex_lock(&ifmgd->mtx);
1702 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1703 IEEE80211_STA_CONNECTION_POLL) &&
1704 ifmgd->associated) {
1707 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1708 if (time_is_after_jiffies(ifmgd->probe_timeout))
1709 run_again(ifmgd, ifmgd->probe_timeout);
1711 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1712 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1713 printk(KERN_DEBUG "No probe response from AP %pM"
1714 " after %dms, try %d\n", bssid,
1715 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1716 ifmgd->probe_send_count);
1718 ieee80211_mgd_probe_ap_send(sdata);
1721 * We actually lost the connection ... or did we?
1724 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1725 IEEE80211_STA_BEACON_POLL);
1726 printk(KERN_DEBUG "No probe response from AP %pM"
1727 " after %dms, disconnecting.\n",
1728 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
1729 ieee80211_set_disassoc(sdata, true);
1730 ieee80211_recalc_idle(local);
1731 mutex_unlock(&ifmgd->mtx);
1733 * must be outside lock due to cfg80211,
1734 * but that's not a problem.
1736 ieee80211_send_deauth_disassoc(sdata, bssid,
1737 IEEE80211_STYPE_DEAUTH,
1738 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1740 mutex_lock(&ifmgd->mtx);
1744 mutex_unlock(&ifmgd->mtx);
1747 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1749 struct ieee80211_sub_if_data *sdata =
1750 (struct ieee80211_sub_if_data *) data;
1751 struct ieee80211_local *local = sdata->local;
1753 if (local->quiescing)
1756 ieee80211_queue_work(&sdata->local->hw,
1757 &sdata->u.mgd.beacon_connection_loss_work);
1760 static void ieee80211_sta_conn_mon_timer(unsigned long data)
1762 struct ieee80211_sub_if_data *sdata =
1763 (struct ieee80211_sub_if_data *) data;
1764 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1765 struct ieee80211_local *local = sdata->local;
1767 if (local->quiescing)
1770 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
1773 static void ieee80211_sta_monitor_work(struct work_struct *work)
1775 struct ieee80211_sub_if_data *sdata =
1776 container_of(work, struct ieee80211_sub_if_data,
1777 u.mgd.monitor_work);
1779 ieee80211_mgd_probe_ap(sdata, false);
1782 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1784 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1785 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1786 IEEE80211_STA_CONNECTION_POLL);
1788 /* let's probe the connection once */
1789 ieee80211_queue_work(&sdata->local->hw,
1790 &sdata->u.mgd.monitor_work);
1791 /* and do all the other regular work too */
1792 ieee80211_queue_work(&sdata->local->hw,
1793 &sdata->u.mgd.work);
1798 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1800 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1803 * we need to use atomic bitops for the running bits
1804 * only because both timers might fire at the same
1805 * time -- the code here is properly synchronised.
1808 cancel_work_sync(&ifmgd->work);
1809 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
1810 if (del_timer_sync(&ifmgd->timer))
1811 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1813 cancel_work_sync(&ifmgd->chswitch_work);
1814 if (del_timer_sync(&ifmgd->chswitch_timer))
1815 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1817 cancel_work_sync(&ifmgd->monitor_work);
1818 /* these will just be re-established on connection */
1819 del_timer_sync(&ifmgd->conn_mon_timer);
1820 del_timer_sync(&ifmgd->bcn_mon_timer);
1823 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1825 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1827 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1828 add_timer(&ifmgd->timer);
1829 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1830 add_timer(&ifmgd->chswitch_timer);
1834 /* interface setup */
1835 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1837 struct ieee80211_if_managed *ifmgd;
1839 ifmgd = &sdata->u.mgd;
1840 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1841 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
1842 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1843 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1844 ieee80211_beacon_connection_loss_work);
1845 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1846 (unsigned long) sdata);
1847 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1848 (unsigned long) sdata);
1849 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1850 (unsigned long) sdata);
1851 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1852 (unsigned long) sdata);
1853 skb_queue_head_init(&ifmgd->skb_queue);
1857 mutex_init(&ifmgd->mtx);
1859 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1860 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1862 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1865 /* scan finished notification */
1866 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1868 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1870 /* Restart STA timers */
1872 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1873 ieee80211_restart_sta_timer(sdata);
1877 int ieee80211_max_network_latency(struct notifier_block *nb,
1878 unsigned long data, void *dummy)
1880 s32 latency_usec = (s32) data;
1881 struct ieee80211_local *local =
1882 container_of(nb, struct ieee80211_local,
1883 network_latency_notifier);
1885 mutex_lock(&local->iflist_mtx);
1886 ieee80211_recalc_ps(local, latency_usec);
1887 mutex_unlock(&local->iflist_mtx);
1893 static enum work_done_result
1894 ieee80211_probe_auth_done(struct ieee80211_work *wk,
1895 struct sk_buff *skb)
1898 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1899 return WORK_DONE_DESTROY;
1902 if (wk->type == IEEE80211_WORK_AUTH) {
1903 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1904 return WORK_DONE_DESTROY;
1907 mutex_lock(&wk->sdata->u.mgd.mtx);
1908 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1909 mutex_unlock(&wk->sdata->u.mgd.mtx);
1911 wk->type = IEEE80211_WORK_AUTH;
1912 wk->probe_auth.tries = 0;
1913 return WORK_DONE_REQUEUE;
1916 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1917 struct cfg80211_auth_request *req)
1920 struct ieee80211_work *wk;
1923 if (req->local_state_change)
1924 return 0; /* no need to update mac80211 state */
1926 switch (req->auth_type) {
1927 case NL80211_AUTHTYPE_OPEN_SYSTEM:
1928 auth_alg = WLAN_AUTH_OPEN;
1930 case NL80211_AUTHTYPE_SHARED_KEY:
1931 auth_alg = WLAN_AUTH_SHARED_KEY;
1933 case NL80211_AUTHTYPE_FT:
1934 auth_alg = WLAN_AUTH_FT;
1936 case NL80211_AUTHTYPE_NETWORK_EAP:
1937 auth_alg = WLAN_AUTH_LEAP;
1943 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1947 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
1949 if (req->ie && req->ie_len) {
1950 memcpy(wk->ie, req->ie, req->ie_len);
1951 wk->ie_len = req->ie_len;
1954 if (req->key && req->key_len) {
1955 wk->probe_auth.key_len = req->key_len;
1956 wk->probe_auth.key_idx = req->key_idx;
1957 memcpy(wk->probe_auth.key, req->key, req->key_len);
1960 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
1961 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
1962 wk->probe_auth.ssid_len = ssid[1];
1964 wk->probe_auth.algorithm = auth_alg;
1965 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
1967 /* if we already have a probe, don't probe again */
1968 if (req->bss->proberesp_ies)
1969 wk->type = IEEE80211_WORK_AUTH;
1971 wk->type = IEEE80211_WORK_DIRECT_PROBE;
1972 wk->chan = req->bss->channel;
1974 wk->done = ieee80211_probe_auth_done;
1976 ieee80211_add_work(wk);
1980 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
1981 struct sk_buff *skb)
1983 struct ieee80211_mgmt *mgmt;
1987 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
1988 return WORK_DONE_DESTROY;
1991 mgmt = (void *)skb->data;
1992 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1994 if (status == WLAN_STATUS_SUCCESS) {
1995 mutex_lock(&wk->sdata->u.mgd.mtx);
1996 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
1997 mutex_unlock(&wk->sdata->u.mgd.mtx);
1998 /* oops -- internal error -- send timeout for now */
1999 cfg80211_send_assoc_timeout(wk->sdata->dev,
2001 return WORK_DONE_DESTROY;
2003 mutex_unlock(&wk->sdata->u.mgd.mtx);
2006 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2007 return WORK_DONE_DESTROY;
2010 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2011 struct cfg80211_assoc_request *req)
2013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2014 struct ieee80211_bss *bss = (void *)req->bss->priv;
2015 struct ieee80211_work *wk;
2019 mutex_lock(&ifmgd->mtx);
2020 if (ifmgd->associated) {
2021 if (!req->prev_bssid ||
2022 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2025 * We are already associated and the request was not a
2026 * reassociation request from the current BSS, so
2029 mutex_unlock(&ifmgd->mtx);
2033 /* Trying to reassociate - clear previous association state */
2034 ieee80211_set_disassoc(sdata, true);
2036 mutex_unlock(&ifmgd->mtx);
2038 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2042 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2043 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2045 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2046 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2047 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2048 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2049 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2052 if (req->ie && req->ie_len) {
2053 memcpy(wk->ie, req->ie, req->ie_len);
2054 wk->ie_len = req->ie_len;
2058 wk->assoc.bss = req->bss;
2060 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2062 /* new association always uses requested smps mode */
2063 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2064 if (ifmgd->powersave)
2065 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2067 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2069 ifmgd->ap_smps = ifmgd->req_smps;
2071 wk->assoc.smps = ifmgd->ap_smps;
2073 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2074 * We still associate in non-HT mode (11a/b/g) if any one of these
2075 * ciphers is configured as pairwise.
2076 * We can set this to true for non-11n hardware, that'll be checked
2077 * separately along with the peer capabilities.
2079 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2080 wk->assoc.capability = req->bss->capability;
2081 wk->assoc.wmm_used = bss->wmm_used;
2082 wk->assoc.supp_rates = bss->supp_rates;
2083 wk->assoc.supp_rates_len = bss->supp_rates_len;
2084 wk->assoc.ht_information_ie =
2085 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2087 if (bss->wmm_used && bss->uapsd_supported &&
2088 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2089 wk->assoc.uapsd_used = true;
2090 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2092 wk->assoc.uapsd_used = false;
2093 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2096 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2097 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2098 wk->assoc.ssid_len = ssid[1];
2100 if (req->prev_bssid)
2101 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2103 wk->type = IEEE80211_WORK_ASSOC;
2104 wk->chan = req->bss->channel;
2106 wk->done = ieee80211_assoc_done;
2109 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2110 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2112 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2113 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2116 if (req->crypto.control_port)
2117 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2119 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2121 ieee80211_add_work(wk);
2125 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2126 struct cfg80211_deauth_request *req,
2129 struct ieee80211_local *local = sdata->local;
2130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2131 struct ieee80211_work *wk;
2132 const u8 *bssid = req->bss->bssid;
2134 mutex_lock(&ifmgd->mtx);
2136 if (ifmgd->associated == req->bss) {
2137 bssid = req->bss->bssid;
2138 ieee80211_set_disassoc(sdata, true);
2139 mutex_unlock(&ifmgd->mtx);
2141 bool not_auth_yet = false;
2143 mutex_unlock(&ifmgd->mtx);
2145 mutex_lock(&local->work_mtx);
2146 list_for_each_entry(wk, &local->work_list, list) {
2147 if (wk->sdata != sdata)
2150 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2151 wk->type != IEEE80211_WORK_AUTH)
2154 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2157 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2158 list_del_rcu(&wk->list);
2162 mutex_unlock(&local->work_mtx);
2165 * If somebody requests authentication and we haven't
2166 * sent out an auth frame yet there's no need to send
2167 * out a deauth frame either. If the state was PROBE,
2168 * then this is the case. If it's AUTH we have sent a
2169 * frame, and if it's IDLE we have completed the auth
2173 __cfg80211_auth_canceled(sdata->dev, bssid);
2178 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2179 sdata->name, bssid, req->reason_code);
2181 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2182 req->reason_code, cookie,
2183 !req->local_state_change);
2185 ieee80211_recalc_idle(sdata->local);
2190 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2191 struct cfg80211_disassoc_request *req,
2194 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2197 mutex_lock(&ifmgd->mtx);
2200 * cfg80211 should catch this ... but it's racy since
2201 * we can receive a disassoc frame, process it, hand it
2202 * to cfg80211 while that's in a locked section already
2203 * trying to tell us that the user wants to disconnect.
2205 if (ifmgd->associated != req->bss) {
2206 mutex_unlock(&ifmgd->mtx);
2210 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2211 sdata->name, req->bss->bssid, req->reason_code);
2213 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2214 ieee80211_set_disassoc(sdata, false);
2216 mutex_unlock(&ifmgd->mtx);
2218 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2219 IEEE80211_STYPE_DISASSOC, req->reason_code,
2220 cookie, !req->local_state_change);
2221 sta_info_destroy_addr(sdata, bssid);
2223 ieee80211_recalc_idle(sdata->local);
2228 int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
2229 struct ieee80211_channel *chan,
2230 enum nl80211_channel_type channel_type,
2231 const u8 *buf, size_t len, u64 *cookie)
2233 struct ieee80211_local *local = sdata->local;
2234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2235 struct sk_buff *skb;
2237 /* Check that we are on the requested channel for transmission */
2238 if ((chan != local->tmp_channel ||
2239 channel_type != local->tmp_channel_type) &&
2240 (chan != local->oper_channel ||
2241 channel_type != local->oper_channel_type))
2244 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2247 skb_reserve(skb, local->hw.extra_tx_headroom);
2249 memcpy(skb_put(skb, len), buf, len);
2251 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
2252 IEEE80211_SKB_CB(skb)->flags |=
2253 IEEE80211_TX_INTFL_DONT_ENCRYPT;
2254 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2255 IEEE80211_TX_CTL_REQ_TX_STATUS;
2256 skb->dev = sdata->dev;
2257 ieee80211_tx_skb(sdata, skb);
2259 *cookie = (unsigned long) skb;
2263 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2264 enum nl80211_cqm_rssi_threshold_event rssi_event,
2267 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2269 trace_api_cqm_rssi_notify(sdata, rssi_event);
2271 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2273 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);