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)
50 #define TMR_RUNNING_TIMER 0
51 #define TMR_RUNNING_CHANSW 1
54 * All cfg80211 functions have to be called outside a locked
55 * section so that they can acquire a lock themselves... This
56 * is much simpler than queuing up things in cfg80211, but we
57 * do need some indirection for that here.
60 /* no action required */
63 /* caller must call cfg80211_send_rx_auth() */
64 RX_MGMT_CFG80211_AUTH,
66 /* caller must call cfg80211_send_rx_assoc() */
67 RX_MGMT_CFG80211_ASSOC,
69 /* caller must call cfg80211_send_deauth() */
70 RX_MGMT_CFG80211_DEAUTH,
72 /* caller must call cfg80211_send_disassoc() */
73 RX_MGMT_CFG80211_DISASSOC,
75 /* caller must tell cfg80211 about internal error */
76 RX_MGMT_CFG80211_ASSOC_ERROR,
80 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
82 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
86 * We can have multiple work items (and connection probing)
87 * scheduling this timer, but we need to take care to only
88 * reschedule it when it should fire _earlier_ than it was
89 * asked for before, or if it's not pending right now. This
90 * function ensures that. Note that it then is required to
91 * run this function for all timeouts after the first one
92 * has happened -- the work that runs from this timer will
95 static void run_again(struct ieee80211_if_managed *ifmgd,
96 unsigned long timeout)
98 ASSERT_MGD_MTX(ifmgd);
100 if (!timer_pending(&ifmgd->timer) ||
101 time_before(timeout, ifmgd->timer.expires))
102 mod_timer(&ifmgd->timer, timeout);
105 static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
107 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
110 mod_timer(&sdata->u.mgd.bcn_mon_timer,
111 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
114 static int ecw2cw(int ecw)
116 return (1 << ecw) - 1;
120 * ieee80211_enable_ht should be called only after the operating band
121 * has been determined as ht configuration depends on the hw's
122 * HT abilities for a specific band.
124 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
125 struct ieee80211_ht_info *hti,
126 const u8 *bssid, u16 ap_ht_cap_flags)
128 struct ieee80211_local *local = sdata->local;
129 struct ieee80211_supported_band *sband;
130 struct sta_info *sta;
133 bool enable_ht = true, ht_changed;
134 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
136 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
138 /* HT is not supported */
139 if (!sband->ht_cap.ht_supported)
142 /* check that channel matches the right operating channel */
143 if (local->hw.conf.channel->center_freq !=
144 ieee80211_channel_to_frequency(hti->control_chan))
148 channel_type = NL80211_CHAN_HT20;
150 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
151 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
152 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
153 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
154 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
155 if (!(local->hw.conf.channel->flags &
156 IEEE80211_CHAN_NO_HT40PLUS))
157 channel_type = NL80211_CHAN_HT40PLUS;
159 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
160 if (!(local->hw.conf.channel->flags &
161 IEEE80211_CHAN_NO_HT40MINUS))
162 channel_type = NL80211_CHAN_HT40MINUS;
168 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
169 channel_type != local->hw.conf.channel_type;
171 local->oper_channel_type = channel_type;
174 /* channel_type change automatically detected */
175 ieee80211_hw_config(local, 0);
178 sta = sta_info_get(sdata, bssid);
180 rate_control_rate_update(local, sband, sta,
181 IEEE80211_RC_HT_CHANGED,
182 local->oper_channel_type);
190 ht_opmode = le16_to_cpu(hti->operation_mode);
192 /* if bss configuration changed store the new one */
193 if (!sdata->ht_opmode_valid ||
194 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
195 changed |= BSS_CHANGED_HT;
196 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
197 sdata->ht_opmode_valid = true;
203 /* frame sending functions */
205 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
206 const u8 *bssid, u16 stype, u16 reason,
209 struct ieee80211_local *local = sdata->local;
210 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
212 struct ieee80211_mgmt *mgmt;
214 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
216 printk(KERN_DEBUG "%s: failed to allocate buffer for "
217 "deauth/disassoc frame\n", sdata->name);
220 skb_reserve(skb, local->hw.extra_tx_headroom);
222 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
224 memcpy(mgmt->da, bssid, ETH_ALEN);
225 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
226 memcpy(mgmt->bssid, bssid, ETH_ALEN);
227 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
229 /* u.deauth.reason_code == u.disassoc.reason_code */
230 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
232 if (stype == IEEE80211_STYPE_DEAUTH)
234 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
236 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
239 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
241 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
242 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
243 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
244 ieee80211_tx_skb(sdata, skb);
247 void ieee80211_send_pspoll(struct ieee80211_local *local,
248 struct ieee80211_sub_if_data *sdata)
250 struct ieee80211_pspoll *pspoll;
253 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
257 pspoll = (struct ieee80211_pspoll *) skb->data;
258 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
260 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
261 ieee80211_tx_skb(sdata, skb);
264 void ieee80211_send_nullfunc(struct ieee80211_local *local,
265 struct ieee80211_sub_if_data *sdata,
269 struct ieee80211_hdr_3addr *nullfunc;
271 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
275 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
277 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
279 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
280 ieee80211_tx_skb(sdata, skb);
283 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
284 struct ieee80211_sub_if_data *sdata)
287 struct ieee80211_hdr *nullfunc;
290 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
293 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
295 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
296 "nullfunc frame\n", sdata->name);
299 skb_reserve(skb, local->hw.extra_tx_headroom);
301 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
302 memset(nullfunc, 0, 30);
303 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
304 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
305 nullfunc->frame_control = fc;
306 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
307 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
308 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
309 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
311 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
312 ieee80211_tx_skb(sdata, skb);
315 /* spectrum management related things */
316 static void ieee80211_chswitch_work(struct work_struct *work)
318 struct ieee80211_sub_if_data *sdata =
319 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
320 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
322 if (!ieee80211_sdata_running(sdata))
325 mutex_lock(&ifmgd->mtx);
326 if (!ifmgd->associated)
329 sdata->local->oper_channel = sdata->local->csa_channel;
330 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
332 /* XXX: shouldn't really modify cfg80211-owned data! */
333 ifmgd->associated->channel = sdata->local->oper_channel;
335 ieee80211_wake_queues_by_reason(&sdata->local->hw,
336 IEEE80211_QUEUE_STOP_REASON_CSA);
338 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
339 mutex_unlock(&ifmgd->mtx);
342 static void ieee80211_chswitch_timer(unsigned long data)
344 struct ieee80211_sub_if_data *sdata =
345 (struct ieee80211_sub_if_data *) data;
346 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
348 if (sdata->local->quiescing) {
349 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
353 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
356 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
357 struct ieee80211_channel_sw_ie *sw_elem,
358 struct ieee80211_bss *bss)
360 struct cfg80211_bss *cbss =
361 container_of((void *)bss, struct cfg80211_bss, priv);
362 struct ieee80211_channel *new_ch;
363 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
364 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
366 ASSERT_MGD_MTX(ifmgd);
368 if (!ifmgd->associated)
371 if (sdata->local->scanning)
374 /* Disregard subsequent beacons if we are already running a timer
377 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
380 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
381 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
384 sdata->local->csa_channel = new_ch;
386 if (sw_elem->count <= 1) {
387 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
389 ieee80211_stop_queues_by_reason(&sdata->local->hw,
390 IEEE80211_QUEUE_STOP_REASON_CSA);
391 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
392 mod_timer(&ifmgd->chswitch_timer,
394 msecs_to_jiffies(sw_elem->count *
395 cbss->beacon_interval));
399 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
400 u16 capab_info, u8 *pwr_constr_elem,
401 u8 pwr_constr_elem_len)
403 struct ieee80211_conf *conf = &sdata->local->hw.conf;
405 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
408 /* Power constraint IE length should be 1 octet */
409 if (pwr_constr_elem_len != 1)
412 if ((*pwr_constr_elem <= conf->channel->max_power) &&
413 (*pwr_constr_elem != sdata->local->power_constr_level)) {
414 sdata->local->power_constr_level = *pwr_constr_elem;
415 ieee80211_hw_config(sdata->local, 0);
420 static void ieee80211_enable_ps(struct ieee80211_local *local,
421 struct ieee80211_sub_if_data *sdata)
423 struct ieee80211_conf *conf = &local->hw.conf;
426 * If we are scanning right now then the parameters will
427 * take effect when scan finishes.
432 if (conf->dynamic_ps_timeout > 0 &&
433 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
434 mod_timer(&local->dynamic_ps_timer, jiffies +
435 msecs_to_jiffies(conf->dynamic_ps_timeout));
437 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
438 ieee80211_send_nullfunc(local, sdata, 1);
440 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
441 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
444 conf->flags |= IEEE80211_CONF_PS;
445 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
449 static void ieee80211_change_ps(struct ieee80211_local *local)
451 struct ieee80211_conf *conf = &local->hw.conf;
453 if (local->ps_sdata) {
454 ieee80211_enable_ps(local, local->ps_sdata);
455 } else if (conf->flags & IEEE80211_CONF_PS) {
456 conf->flags &= ~IEEE80211_CONF_PS;
457 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
458 del_timer_sync(&local->dynamic_ps_timer);
459 cancel_work_sync(&local->dynamic_ps_enable_work);
463 /* need to hold RTNL or interface lock */
464 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
466 struct ieee80211_sub_if_data *sdata, *found = NULL;
469 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
470 local->ps_sdata = NULL;
474 if (!list_empty(&local->work_list)) {
475 local->ps_sdata = NULL;
479 list_for_each_entry(sdata, &local->interfaces, list) {
480 if (!ieee80211_sdata_running(sdata))
482 if (sdata->vif.type != NL80211_IFTYPE_STATION)
488 if (count == 1 && found->u.mgd.powersave &&
489 found->u.mgd.associated &&
490 found->u.mgd.associated->beacon_ies &&
491 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
492 IEEE80211_STA_CONNECTION_POLL))) {
496 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
498 beaconint_us = ieee80211_tu_to_usec(
499 found->vif.bss_conf.beacon_int);
501 if (beaconint_us > latency) {
502 local->ps_sdata = NULL;
504 struct ieee80211_bss *bss;
508 bss = (void *)found->u.mgd.associated->priv;
509 dtimper = bss->dtim_period;
511 /* If the TIM IE is invalid, pretend the value is 1 */
514 else if (dtimper > 1)
515 maxslp = min_t(int, dtimper,
516 latency / beaconint_us);
518 local->hw.conf.max_sleep_period = maxslp;
519 local->hw.conf.ps_dtim_period = dtimper;
520 local->ps_sdata = found;
523 local->ps_sdata = NULL;
527 ieee80211_change_ps(local);
530 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
532 struct ieee80211_local *local =
533 container_of(work, struct ieee80211_local,
534 dynamic_ps_disable_work);
536 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
537 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
538 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
541 ieee80211_wake_queues_by_reason(&local->hw,
542 IEEE80211_QUEUE_STOP_REASON_PS);
545 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
547 struct ieee80211_local *local =
548 container_of(work, struct ieee80211_local,
549 dynamic_ps_enable_work);
550 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
551 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
553 /* can only happen when PS was just disabled anyway */
557 if (local->hw.conf.flags & IEEE80211_CONF_PS)
560 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
561 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
562 ieee80211_send_nullfunc(local, sdata, 1);
564 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
565 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
566 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
567 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
568 local->hw.conf.flags |= IEEE80211_CONF_PS;
569 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
573 void ieee80211_dynamic_ps_timer(unsigned long data)
575 struct ieee80211_local *local = (void *) data;
577 if (local->quiescing || local->suspended)
580 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
584 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
585 struct ieee80211_if_managed *ifmgd,
586 u8 *wmm_param, size_t wmm_param_len)
588 struct ieee80211_tx_queue_params params;
591 u8 *pos, uapsd_queues = 0;
593 if (local->hw.queues < 4)
599 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
602 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
603 uapsd_queues = local->uapsd_queues;
605 count = wmm_param[6] & 0x0f;
606 if (count == ifmgd->wmm_last_param_set)
608 ifmgd->wmm_last_param_set = count;
611 left = wmm_param_len - 8;
613 memset(¶ms, 0, sizeof(params));
616 for (; left >= 4; left -= 4, pos += 4) {
617 int aci = (pos[0] >> 5) & 0x03;
618 int acm = (pos[0] >> 4) & 0x01;
626 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
627 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
633 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
634 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
640 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
641 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
648 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
649 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
654 params.aifs = pos[0] & 0x0f;
655 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
656 params.cw_min = ecw2cw(pos[1] & 0x0f);
657 params.txop = get_unaligned_le16(pos + 2);
658 params.uapsd = uapsd;
660 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
661 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
662 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
663 wiphy_name(local->hw.wiphy), queue, aci, acm,
664 params.aifs, params.cw_min, params.cw_max, params.txop,
667 if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx)
668 printk(KERN_DEBUG "%s: failed to set TX queue "
669 "parameters for queue %d\n",
670 wiphy_name(local->hw.wiphy), queue);
674 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
675 u16 capab, bool erp_valid, u8 erp)
677 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
680 bool use_short_preamble;
684 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
685 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
687 use_protection = false;
688 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
691 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
692 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
693 use_short_slot = true;
695 if (use_protection != bss_conf->use_cts_prot) {
696 bss_conf->use_cts_prot = use_protection;
697 changed |= BSS_CHANGED_ERP_CTS_PROT;
700 if (use_short_preamble != bss_conf->use_short_preamble) {
701 bss_conf->use_short_preamble = use_short_preamble;
702 changed |= BSS_CHANGED_ERP_PREAMBLE;
705 if (use_short_slot != bss_conf->use_short_slot) {
706 bss_conf->use_short_slot = use_short_slot;
707 changed |= BSS_CHANGED_ERP_SLOT;
713 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
714 struct cfg80211_bss *cbss,
715 u32 bss_info_changed)
717 struct ieee80211_bss *bss = (void *)cbss->priv;
718 struct ieee80211_local *local = sdata->local;
720 bss_info_changed |= BSS_CHANGED_ASSOC;
721 /* set timing information */
722 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
723 sdata->vif.bss_conf.timestamp = cbss->tsf;
725 bss_info_changed |= BSS_CHANGED_BEACON_INT;
726 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
727 cbss->capability, bss->has_erp_value, bss->erp_value);
729 sdata->u.mgd.associated = cbss;
730 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
732 /* just to be sure */
733 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
734 IEEE80211_STA_BEACON_POLL);
737 * Always handle WMM once after association regardless
738 * of the first value the AP uses. Setting -1 here has
739 * that effect because the AP values is an unsigned
742 sdata->u.mgd.wmm_last_param_set = -1;
744 ieee80211_led_assoc(local, 1);
746 sdata->vif.bss_conf.assoc = 1;
748 * For now just always ask the driver to update the basic rateset
749 * when we have associated, we aren't checking whether it actually
752 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
754 /* And the BSSID changed - we're associated now */
755 bss_info_changed |= BSS_CHANGED_BSSID;
757 /* Tell the driver to monitor connection quality (if supported) */
758 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
759 sdata->vif.bss_conf.cqm_rssi_thold)
760 bss_info_changed |= BSS_CHANGED_CQM;
762 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
764 mutex_lock(&local->iflist_mtx);
765 ieee80211_recalc_ps(local, -1);
766 ieee80211_recalc_smps(local, sdata);
767 mutex_unlock(&local->iflist_mtx);
769 netif_tx_start_all_queues(sdata->dev);
770 netif_carrier_on(sdata->dev);
773 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata)
775 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
776 struct ieee80211_local *local = sdata->local;
777 struct sta_info *sta;
778 u32 changed = 0, config_changed = 0;
781 ASSERT_MGD_MTX(ifmgd);
783 if (WARN_ON(!ifmgd->associated))
786 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
788 ifmgd->associated = NULL;
789 memset(ifmgd->bssid, 0, ETH_ALEN);
792 * we need to commit the associated = NULL change because the
793 * scan code uses that to determine whether this iface should
794 * go to/wake up from powersave or not -- and could otherwise
795 * wake the queues erroneously.
800 * Thus, we can only afterwards stop the queues -- to account
801 * for the case where another CPU is finishing a scan at this
802 * time -- we don't want the scan code to enable queues.
805 netif_tx_stop_all_queues(sdata->dev);
806 netif_carrier_off(sdata->dev);
809 sta = sta_info_get(sdata, bssid);
811 set_sta_flags(sta, WLAN_STA_DISASSOC);
812 ieee80211_sta_tear_down_BA_sessions(sta);
816 changed |= ieee80211_reset_erp_info(sdata);
818 ieee80211_led_assoc(local, 0);
819 changed |= BSS_CHANGED_ASSOC;
820 sdata->vif.bss_conf.assoc = false;
822 ieee80211_set_wmm_default(sdata);
824 /* channel(_type) changes are handled by ieee80211_hw_config */
825 local->oper_channel_type = NL80211_CHAN_NO_HT;
827 /* on the next assoc, re-program HT parameters */
828 sdata->ht_opmode_valid = false;
830 local->power_constr_level = 0;
832 del_timer_sync(&local->dynamic_ps_timer);
833 cancel_work_sync(&local->dynamic_ps_enable_work);
835 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
836 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
837 config_changed |= IEEE80211_CONF_CHANGE_PS;
840 ieee80211_hw_config(local, config_changed);
842 /* And the BSSID changed -- not very interesting here */
843 changed |= BSS_CHANGED_BSSID;
844 ieee80211_bss_info_change_notify(sdata, changed);
846 sta_info_destroy_addr(sdata, bssid);
849 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
850 struct ieee80211_hdr *hdr)
853 * We can postpone the mgd.timer whenever receiving unicast frames
854 * from AP because we know that the connection is working both ways
855 * at that time. But multicast frames (and hence also beacons) must
856 * be ignored here, because we need to trigger the timer during
857 * data idle periods for sending the periodic probe request to the
858 * AP we're connected to.
860 if (is_multicast_ether_addr(hdr->addr1))
863 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
866 mod_timer(&sdata->u.mgd.conn_mon_timer,
867 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
870 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
872 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
875 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
876 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
877 ssid + 2, ssid[1], NULL, 0);
879 ifmgd->probe_send_count++;
880 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
881 run_again(ifmgd, ifmgd->probe_timeout);
884 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
887 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
888 bool already = false;
890 if (!ieee80211_sdata_running(sdata))
893 if (sdata->local->scanning)
896 if (sdata->local->tmp_channel)
899 mutex_lock(&ifmgd->mtx);
901 if (!ifmgd->associated)
904 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
905 if (beacon && net_ratelimit())
906 printk(KERN_DEBUG "%s: detected beacon loss from AP "
907 "- sending probe request\n", sdata->name);
911 * The driver/our work has already reported this event or the
912 * connection monitoring has kicked in and we have already sent
913 * a probe request. Or maybe the AP died and the driver keeps
914 * reporting until we disassociate...
916 * In either case we have to ignore the current call to this
917 * function (except for setting the correct probe reason bit)
918 * because otherwise we would reset the timer every time and
919 * never check whether we received a probe response!
921 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
922 IEEE80211_STA_CONNECTION_POLL))
926 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
928 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
933 mutex_lock(&sdata->local->iflist_mtx);
934 ieee80211_recalc_ps(sdata->local, -1);
935 mutex_unlock(&sdata->local->iflist_mtx);
937 ifmgd->probe_send_count = 0;
938 ieee80211_mgd_probe_ap_send(sdata);
940 mutex_unlock(&ifmgd->mtx);
943 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
945 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
946 struct ieee80211_local *local = sdata->local;
949 mutex_lock(&ifmgd->mtx);
950 if (!ifmgd->associated) {
951 mutex_unlock(&ifmgd->mtx);
955 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
957 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
959 ieee80211_set_disassoc(sdata);
960 ieee80211_recalc_idle(local);
961 mutex_unlock(&ifmgd->mtx);
963 * must be outside lock due to cfg80211,
964 * but that's not a problem.
966 ieee80211_send_deauth_disassoc(sdata, bssid,
967 IEEE80211_STYPE_DEAUTH,
968 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
972 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
974 struct ieee80211_sub_if_data *sdata =
975 container_of(work, struct ieee80211_sub_if_data,
976 u.mgd.beacon_connection_loss_work);
978 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
979 __ieee80211_connection_loss(sdata);
981 ieee80211_mgd_probe_ap(sdata, true);
984 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
986 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
987 struct ieee80211_hw *hw = &sdata->local->hw;
989 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
990 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
992 EXPORT_SYMBOL(ieee80211_beacon_loss);
994 void ieee80211_connection_loss(struct ieee80211_vif *vif)
996 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
997 struct ieee80211_hw *hw = &sdata->local->hw;
999 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1000 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1002 EXPORT_SYMBOL(ieee80211_connection_loss);
1005 static enum rx_mgmt_action __must_check
1006 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1007 struct ieee80211_mgmt *mgmt, size_t len)
1009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1010 const u8 *bssid = NULL;
1014 return RX_MGMT_NONE;
1016 ASSERT_MGD_MTX(ifmgd);
1018 bssid = ifmgd->associated->bssid;
1020 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1022 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1023 sdata->name, bssid, reason_code);
1025 ieee80211_set_disassoc(sdata);
1026 ieee80211_recalc_idle(sdata->local);
1028 return RX_MGMT_CFG80211_DEAUTH;
1032 static enum rx_mgmt_action __must_check
1033 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1034 struct ieee80211_mgmt *mgmt, size_t len)
1036 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1040 return RX_MGMT_NONE;
1042 ASSERT_MGD_MTX(ifmgd);
1044 if (WARN_ON(!ifmgd->associated))
1045 return RX_MGMT_NONE;
1047 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1048 return RX_MGMT_NONE;
1050 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1052 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1053 sdata->name, mgmt->sa, reason_code);
1055 ieee80211_set_disassoc(sdata);
1056 ieee80211_recalc_idle(sdata->local);
1057 return RX_MGMT_CFG80211_DISASSOC;
1061 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1062 struct ieee80211_mgmt *mgmt, size_t len)
1064 struct ieee80211_sub_if_data *sdata = wk->sdata;
1065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1066 struct ieee80211_local *local = sdata->local;
1067 struct ieee80211_supported_band *sband;
1068 struct sta_info *sta;
1069 struct cfg80211_bss *cbss = wk->assoc.bss;
1071 u32 rates, basic_rates;
1072 u16 capab_info, aid;
1073 struct ieee802_11_elems elems;
1074 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1077 bool have_higher_than_11mbit = false;
1078 u16 ap_ht_cap_flags;
1080 /* AssocResp and ReassocResp have identical structure */
1082 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1083 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1085 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1086 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1087 "set\n", sdata->name, aid);
1088 aid &= ~(BIT(15) | BIT(14));
1090 pos = mgmt->u.assoc_resp.variable;
1091 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1093 if (!elems.supp_rates) {
1094 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1101 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
1103 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1104 " the AP\n", sdata->name);
1108 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1110 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1111 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1115 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1117 for (i = 0; i < elems.supp_rates_len; i++) {
1118 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1119 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1122 have_higher_than_11mbit = true;
1124 for (j = 0; j < sband->n_bitrates; j++) {
1125 if (sband->bitrates[j].bitrate == rate) {
1128 basic_rates |= BIT(j);
1134 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1135 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1136 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1139 have_higher_than_11mbit = true;
1141 for (j = 0; j < sband->n_bitrates; j++) {
1142 if (sband->bitrates[j].bitrate == rate) {
1145 basic_rates |= BIT(j);
1151 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1152 sdata->vif.bss_conf.basic_rates = basic_rates;
1154 /* cf. IEEE 802.11 9.2.12 */
1155 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1156 have_higher_than_11mbit)
1157 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1159 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1161 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1162 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1163 elems.ht_cap_elem, &sta->sta.ht_cap);
1165 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1167 rate_control_rate_init(sta);
1169 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1170 set_sta_flags(sta, WLAN_STA_MFP);
1172 if (elems.wmm_param)
1173 set_sta_flags(sta, WLAN_STA_WME);
1175 err = sta_info_insert(sta);
1178 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1179 " the AP (error %d)\n", sdata->name, err);
1183 if (elems.wmm_param)
1184 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1185 elems.wmm_param_len);
1187 ieee80211_set_wmm_default(sdata);
1189 local->oper_channel = wk->chan;
1191 if (elems.ht_info_elem && elems.wmm_param &&
1192 (sdata->local->hw.queues >= 4) &&
1193 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1194 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1195 cbss->bssid, ap_ht_cap_flags);
1197 /* set AID and assoc capability,
1198 * ieee80211_set_associated() will tell the driver */
1199 bss_conf->aid = aid;
1200 bss_conf->assoc_capability = capab_info;
1201 ieee80211_set_associated(sdata, cbss, changed);
1204 * If we're using 4-addr mode, let the AP know that we're
1205 * doing so, so that it can create the STA VLAN on its side
1207 if (ifmgd->use_4addr)
1208 ieee80211_send_4addr_nullfunc(local, sdata);
1211 * Start timer to probe the connection to the AP now.
1212 * Also start the timer that will detect beacon loss.
1214 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1215 mod_beacon_timer(sdata);
1221 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1222 struct ieee80211_mgmt *mgmt,
1224 struct ieee80211_rx_status *rx_status,
1225 struct ieee802_11_elems *elems,
1228 struct ieee80211_local *local = sdata->local;
1230 struct ieee80211_bss *bss;
1231 struct ieee80211_channel *channel;
1232 bool need_ps = false;
1234 if (sdata->u.mgd.associated) {
1235 bss = (void *)sdata->u.mgd.associated->priv;
1236 /* not previously set so we may need to recalc */
1237 need_ps = !bss->dtim_period;
1240 if (elems->ds_params && elems->ds_params_len == 1)
1241 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1243 freq = rx_status->freq;
1245 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1247 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1250 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1253 ieee80211_rx_bss_put(local, bss);
1255 if (!sdata->u.mgd.associated)
1259 mutex_lock(&local->iflist_mtx);
1260 ieee80211_recalc_ps(local, -1);
1261 mutex_unlock(&local->iflist_mtx);
1264 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1265 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1267 struct ieee80211_channel_sw_ie *sw_elem =
1268 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1269 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1274 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1275 struct sk_buff *skb)
1277 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1278 struct ieee80211_if_managed *ifmgd;
1279 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1280 size_t baselen, len = skb->len;
1281 struct ieee802_11_elems elems;
1283 ifmgd = &sdata->u.mgd;
1285 ASSERT_MGD_MTX(ifmgd);
1287 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1288 return; /* ignore ProbeResp to foreign address */
1290 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1294 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1297 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1299 if (ifmgd->associated &&
1300 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
1301 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1302 IEEE80211_STA_CONNECTION_POLL)) {
1303 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1304 IEEE80211_STA_BEACON_POLL);
1305 mutex_lock(&sdata->local->iflist_mtx);
1306 ieee80211_recalc_ps(sdata->local, -1);
1307 mutex_unlock(&sdata->local->iflist_mtx);
1309 * We've received a probe response, but are not sure whether
1310 * we have or will be receiving any beacons or data, so let's
1311 * schedule the timers again, just in case.
1313 mod_beacon_timer(sdata);
1314 mod_timer(&ifmgd->conn_mon_timer,
1315 round_jiffies_up(jiffies +
1316 IEEE80211_CONNECTION_IDLE_TIME));
1321 * This is the canonical list of information elements we care about,
1322 * the filter code also gives us all changes to the Microsoft OUI
1323 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1325 * We implement beacon filtering in software since that means we can
1326 * avoid processing the frame here and in cfg80211, and userspace
1327 * will not be able to tell whether the hardware supports it or not.
1329 * XXX: This list needs to be dynamic -- userspace needs to be able to
1330 * add items it requires. It also needs to be able to tell us to
1331 * look out for other vendor IEs.
1333 static const u64 care_about_ies =
1334 (1ULL << WLAN_EID_COUNTRY) |
1335 (1ULL << WLAN_EID_ERP_INFO) |
1336 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1337 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1338 (1ULL << WLAN_EID_HT_CAPABILITY) |
1339 (1ULL << WLAN_EID_HT_INFORMATION);
1341 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1342 struct ieee80211_mgmt *mgmt,
1344 struct ieee80211_rx_status *rx_status)
1346 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1348 struct ieee802_11_elems elems;
1349 struct ieee80211_local *local = sdata->local;
1351 bool erp_valid, directed_tim = false;
1356 ASSERT_MGD_MTX(ifmgd);
1358 /* Process beacon from the current BSS */
1359 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1363 if (rx_status->freq != local->hw.conf.channel->center_freq)
1367 * We might have received a number of frames, among them a
1368 * disassoc frame and a beacon...
1370 if (!ifmgd->associated)
1373 bssid = ifmgd->associated->bssid;
1376 * And in theory even frames from a different AP we were just
1377 * associated to a split-second ago!
1379 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1382 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1383 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1384 if (net_ratelimit()) {
1385 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1386 "to a received beacon\n", sdata->name);
1389 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1390 mutex_lock(&local->iflist_mtx);
1391 ieee80211_recalc_ps(local, -1);
1392 mutex_unlock(&local->iflist_mtx);
1396 * Push the beacon loss detection into the future since
1397 * we are processing a beacon from the AP just now.
1399 mod_beacon_timer(sdata);
1401 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1402 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1403 len - baselen, &elems,
1404 care_about_ies, ncrc);
1406 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1407 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1410 if (ncrc != ifmgd->beacon_crc) {
1411 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1414 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1415 elems.wmm_param_len);
1418 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1420 if (local->hw.conf.dynamic_ps_timeout > 0) {
1421 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1422 ieee80211_hw_config(local,
1423 IEEE80211_CONF_CHANGE_PS);
1424 ieee80211_send_nullfunc(local, sdata, 0);
1426 local->pspolling = true;
1429 * Here is assumed that the driver will be
1430 * able to send ps-poll frame and receive a
1431 * response even though power save mode is
1432 * enabled, but some drivers might require
1433 * to disable power save here. This needs
1434 * to be investigated.
1436 ieee80211_send_pspoll(local, sdata);
1441 if (ncrc == ifmgd->beacon_crc)
1443 ifmgd->beacon_crc = ncrc;
1445 if (elems.erp_info && elems.erp_info_len >= 1) {
1447 erp_value = elems.erp_info[0];
1451 changed |= ieee80211_handle_bss_capability(sdata,
1452 le16_to_cpu(mgmt->u.beacon.capab_info),
1453 erp_valid, erp_value);
1456 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1457 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1458 struct sta_info *sta;
1459 struct ieee80211_supported_band *sband;
1460 u16 ap_ht_cap_flags;
1464 sta = sta_info_get(sdata, bssid);
1465 if (WARN_ON(!sta)) {
1470 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1472 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1473 elems.ht_cap_elem, &sta->sta.ht_cap);
1475 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1479 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1480 bssid, ap_ht_cap_flags);
1483 /* Note: country IE parsing is done for us by cfg80211 */
1484 if (elems.country_elem) {
1485 /* TODO: IBSS also needs this */
1486 if (elems.pwr_constr_elem)
1487 ieee80211_handle_pwr_constr(sdata,
1488 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1489 elems.pwr_constr_elem,
1490 elems.pwr_constr_elem_len);
1493 ieee80211_bss_info_change_notify(sdata, changed);
1496 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1497 struct sk_buff *skb)
1499 struct ieee80211_local *local = sdata->local;
1500 struct ieee80211_mgmt *mgmt;
1504 return RX_DROP_MONITOR;
1506 mgmt = (struct ieee80211_mgmt *) skb->data;
1507 fc = le16_to_cpu(mgmt->frame_control);
1509 switch (fc & IEEE80211_FCTL_STYPE) {
1510 case IEEE80211_STYPE_PROBE_RESP:
1511 case IEEE80211_STYPE_BEACON:
1512 case IEEE80211_STYPE_DEAUTH:
1513 case IEEE80211_STYPE_DISASSOC:
1514 case IEEE80211_STYPE_ACTION:
1515 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1516 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1520 return RX_DROP_MONITOR;
1523 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1524 struct sk_buff *skb)
1526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1527 struct ieee80211_rx_status *rx_status;
1528 struct ieee80211_mgmt *mgmt;
1529 enum rx_mgmt_action rma = RX_MGMT_NONE;
1532 rx_status = (struct ieee80211_rx_status *) skb->cb;
1533 mgmt = (struct ieee80211_mgmt *) skb->data;
1534 fc = le16_to_cpu(mgmt->frame_control);
1536 mutex_lock(&ifmgd->mtx);
1538 if (ifmgd->associated &&
1539 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1540 switch (fc & IEEE80211_FCTL_STYPE) {
1541 case IEEE80211_STYPE_BEACON:
1542 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1545 case IEEE80211_STYPE_PROBE_RESP:
1546 ieee80211_rx_mgmt_probe_resp(sdata, skb);
1548 case IEEE80211_STYPE_DEAUTH:
1549 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1551 case IEEE80211_STYPE_DISASSOC:
1552 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1554 case IEEE80211_STYPE_ACTION:
1555 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1558 ieee80211_sta_process_chanswitch(sdata,
1559 &mgmt->u.action.u.chan_switch.sw_elem,
1560 (void *)ifmgd->associated->priv);
1563 mutex_unlock(&ifmgd->mtx);
1569 case RX_MGMT_CFG80211_DEAUTH:
1570 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1572 case RX_MGMT_CFG80211_DISASSOC:
1573 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1576 WARN(1, "unexpected: %d", rma);
1581 mutex_unlock(&ifmgd->mtx);
1583 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
1584 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
1585 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1591 static void ieee80211_sta_timer(unsigned long data)
1593 struct ieee80211_sub_if_data *sdata =
1594 (struct ieee80211_sub_if_data *) data;
1595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1596 struct ieee80211_local *local = sdata->local;
1598 if (local->quiescing) {
1599 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1603 ieee80211_queue_work(&local->hw, &ifmgd->work);
1606 static void ieee80211_sta_work(struct work_struct *work)
1608 struct ieee80211_sub_if_data *sdata =
1609 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1610 struct ieee80211_local *local = sdata->local;
1611 struct ieee80211_if_managed *ifmgd;
1612 struct sk_buff *skb;
1614 if (!ieee80211_sdata_running(sdata))
1617 if (local->scanning)
1620 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1624 * ieee80211_queue_work() should have picked up most cases,
1625 * here we'll pick the the rest.
1627 if (WARN(local->suspended, "STA MLME work scheduled while "
1628 "going to suspend\n"))
1631 ifmgd = &sdata->u.mgd;
1633 /* first process frames to avoid timing out while a frame is pending */
1634 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1635 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1637 /* then process the rest of the work */
1638 mutex_lock(&ifmgd->mtx);
1640 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1641 IEEE80211_STA_CONNECTION_POLL) &&
1642 ifmgd->associated) {
1645 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1646 if (time_is_after_jiffies(ifmgd->probe_timeout))
1647 run_again(ifmgd, ifmgd->probe_timeout);
1649 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1650 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1651 printk(KERN_DEBUG "No probe response from AP %pM"
1652 " after %dms, try %d\n", bssid,
1653 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1654 ifmgd->probe_send_count);
1656 ieee80211_mgd_probe_ap_send(sdata);
1659 * We actually lost the connection ... or did we?
1662 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1663 IEEE80211_STA_BEACON_POLL);
1664 printk(KERN_DEBUG "No probe response from AP %pM"
1665 " after %dms, disconnecting.\n",
1666 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
1667 ieee80211_set_disassoc(sdata);
1668 ieee80211_recalc_idle(local);
1669 mutex_unlock(&ifmgd->mtx);
1671 * must be outside lock due to cfg80211,
1672 * but that's not a problem.
1674 ieee80211_send_deauth_disassoc(sdata, bssid,
1675 IEEE80211_STYPE_DEAUTH,
1676 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1678 mutex_lock(&ifmgd->mtx);
1682 mutex_unlock(&ifmgd->mtx);
1685 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1687 struct ieee80211_sub_if_data *sdata =
1688 (struct ieee80211_sub_if_data *) data;
1689 struct ieee80211_local *local = sdata->local;
1691 if (local->quiescing)
1694 ieee80211_queue_work(&sdata->local->hw,
1695 &sdata->u.mgd.beacon_connection_loss_work);
1698 static void ieee80211_sta_conn_mon_timer(unsigned long data)
1700 struct ieee80211_sub_if_data *sdata =
1701 (struct ieee80211_sub_if_data *) data;
1702 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1703 struct ieee80211_local *local = sdata->local;
1705 if (local->quiescing)
1708 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
1711 static void ieee80211_sta_monitor_work(struct work_struct *work)
1713 struct ieee80211_sub_if_data *sdata =
1714 container_of(work, struct ieee80211_sub_if_data,
1715 u.mgd.monitor_work);
1717 ieee80211_mgd_probe_ap(sdata, false);
1720 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1722 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1723 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1724 IEEE80211_STA_CONNECTION_POLL);
1726 /* let's probe the connection once */
1727 ieee80211_queue_work(&sdata->local->hw,
1728 &sdata->u.mgd.monitor_work);
1729 /* and do all the other regular work too */
1730 ieee80211_queue_work(&sdata->local->hw,
1731 &sdata->u.mgd.work);
1736 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1738 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1741 * we need to use atomic bitops for the running bits
1742 * only because both timers might fire at the same
1743 * time -- the code here is properly synchronised.
1746 cancel_work_sync(&ifmgd->work);
1747 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
1748 if (del_timer_sync(&ifmgd->timer))
1749 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1751 cancel_work_sync(&ifmgd->chswitch_work);
1752 if (del_timer_sync(&ifmgd->chswitch_timer))
1753 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1755 cancel_work_sync(&ifmgd->monitor_work);
1756 /* these will just be re-established on connection */
1757 del_timer_sync(&ifmgd->conn_mon_timer);
1758 del_timer_sync(&ifmgd->bcn_mon_timer);
1761 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1763 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1765 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1766 add_timer(&ifmgd->timer);
1767 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1768 add_timer(&ifmgd->chswitch_timer);
1772 /* interface setup */
1773 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1775 struct ieee80211_if_managed *ifmgd;
1777 ifmgd = &sdata->u.mgd;
1778 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1779 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
1780 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1781 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1782 ieee80211_beacon_connection_loss_work);
1783 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1784 (unsigned long) sdata);
1785 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1786 (unsigned long) sdata);
1787 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1788 (unsigned long) sdata);
1789 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1790 (unsigned long) sdata);
1791 skb_queue_head_init(&ifmgd->skb_queue);
1795 mutex_init(&ifmgd->mtx);
1797 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1798 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1800 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1803 /* scan finished notification */
1804 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1806 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1808 /* Restart STA timers */
1810 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1811 ieee80211_restart_sta_timer(sdata);
1815 int ieee80211_max_network_latency(struct notifier_block *nb,
1816 unsigned long data, void *dummy)
1818 s32 latency_usec = (s32) data;
1819 struct ieee80211_local *local =
1820 container_of(nb, struct ieee80211_local,
1821 network_latency_notifier);
1823 mutex_lock(&local->iflist_mtx);
1824 ieee80211_recalc_ps(local, latency_usec);
1825 mutex_unlock(&local->iflist_mtx);
1831 static enum work_done_result
1832 ieee80211_probe_auth_done(struct ieee80211_work *wk,
1833 struct sk_buff *skb)
1836 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1837 return WORK_DONE_DESTROY;
1840 if (wk->type == IEEE80211_WORK_AUTH) {
1841 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1842 return WORK_DONE_DESTROY;
1845 mutex_lock(&wk->sdata->u.mgd.mtx);
1846 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1847 mutex_unlock(&wk->sdata->u.mgd.mtx);
1849 wk->type = IEEE80211_WORK_AUTH;
1850 wk->probe_auth.tries = 0;
1851 return WORK_DONE_REQUEUE;
1854 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1855 struct cfg80211_auth_request *req)
1858 struct ieee80211_work *wk;
1861 switch (req->auth_type) {
1862 case NL80211_AUTHTYPE_OPEN_SYSTEM:
1863 auth_alg = WLAN_AUTH_OPEN;
1865 case NL80211_AUTHTYPE_SHARED_KEY:
1866 auth_alg = WLAN_AUTH_SHARED_KEY;
1868 case NL80211_AUTHTYPE_FT:
1869 auth_alg = WLAN_AUTH_FT;
1871 case NL80211_AUTHTYPE_NETWORK_EAP:
1872 auth_alg = WLAN_AUTH_LEAP;
1878 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1882 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
1884 if (req->ie && req->ie_len) {
1885 memcpy(wk->ie, req->ie, req->ie_len);
1886 wk->ie_len = req->ie_len;
1889 if (req->key && req->key_len) {
1890 wk->probe_auth.key_len = req->key_len;
1891 wk->probe_auth.key_idx = req->key_idx;
1892 memcpy(wk->probe_auth.key, req->key, req->key_len);
1895 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
1896 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
1897 wk->probe_auth.ssid_len = ssid[1];
1899 wk->probe_auth.algorithm = auth_alg;
1900 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
1902 /* if we already have a probe, don't probe again */
1903 if (req->bss->proberesp_ies)
1904 wk->type = IEEE80211_WORK_AUTH;
1906 wk->type = IEEE80211_WORK_DIRECT_PROBE;
1907 wk->chan = req->bss->channel;
1909 wk->done = ieee80211_probe_auth_done;
1911 ieee80211_add_work(wk);
1915 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
1916 struct sk_buff *skb)
1918 struct ieee80211_mgmt *mgmt;
1922 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
1923 return WORK_DONE_DESTROY;
1926 mgmt = (void *)skb->data;
1927 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1929 if (status == WLAN_STATUS_SUCCESS) {
1930 mutex_lock(&wk->sdata->u.mgd.mtx);
1931 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
1932 mutex_unlock(&wk->sdata->u.mgd.mtx);
1933 /* oops -- internal error -- send timeout for now */
1934 cfg80211_send_assoc_timeout(wk->sdata->dev,
1936 return WORK_DONE_DESTROY;
1938 mutex_unlock(&wk->sdata->u.mgd.mtx);
1941 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
1942 return WORK_DONE_DESTROY;
1945 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1946 struct cfg80211_assoc_request *req)
1948 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1949 struct ieee80211_bss *bss = (void *)req->bss->priv;
1950 struct ieee80211_work *wk;
1954 mutex_lock(&ifmgd->mtx);
1955 if (ifmgd->associated) {
1956 if (!req->prev_bssid ||
1957 memcmp(req->prev_bssid, ifmgd->associated->bssid,
1960 * We are already associated and the request was not a
1961 * reassociation request from the current BSS, so
1964 mutex_unlock(&ifmgd->mtx);
1968 /* Trying to reassociate - clear previous association state */
1969 ieee80211_set_disassoc(sdata);
1971 mutex_unlock(&ifmgd->mtx);
1973 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1977 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
1978 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1980 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
1981 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
1982 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1983 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
1984 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1987 if (req->ie && req->ie_len) {
1988 memcpy(wk->ie, req->ie, req->ie_len);
1989 wk->ie_len = req->ie_len;
1993 wk->assoc.bss = req->bss;
1995 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
1997 /* new association always uses requested smps mode */
1998 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
1999 if (ifmgd->powersave)
2000 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2002 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2004 ifmgd->ap_smps = ifmgd->req_smps;
2006 wk->assoc.smps = ifmgd->ap_smps;
2008 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2009 * We still associate in non-HT mode (11a/b/g) if any one of these
2010 * ciphers is configured as pairwise.
2011 * We can set this to true for non-11n hardware, that'll be checked
2012 * separately along with the peer capabilities.
2014 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2015 wk->assoc.capability = req->bss->capability;
2016 wk->assoc.wmm_used = bss->wmm_used;
2017 wk->assoc.supp_rates = bss->supp_rates;
2018 wk->assoc.supp_rates_len = bss->supp_rates_len;
2019 wk->assoc.ht_information_ie =
2020 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2022 if (bss->wmm_used && bss->uapsd_supported &&
2023 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2024 wk->assoc.uapsd_used = true;
2025 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2027 wk->assoc.uapsd_used = false;
2028 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2031 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2032 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2033 wk->assoc.ssid_len = ssid[1];
2035 if (req->prev_bssid)
2036 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2038 wk->type = IEEE80211_WORK_ASSOC;
2039 wk->chan = req->bss->channel;
2041 wk->done = ieee80211_assoc_done;
2044 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2045 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2047 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2048 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2051 if (req->crypto.control_port)
2052 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2054 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2056 ieee80211_add_work(wk);
2060 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2061 struct cfg80211_deauth_request *req,
2064 struct ieee80211_local *local = sdata->local;
2065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2066 struct ieee80211_work *wk;
2067 const u8 *bssid = req->bss->bssid;
2069 mutex_lock(&ifmgd->mtx);
2071 if (ifmgd->associated == req->bss) {
2072 bssid = req->bss->bssid;
2073 ieee80211_set_disassoc(sdata);
2074 mutex_unlock(&ifmgd->mtx);
2076 bool not_auth_yet = false;
2078 mutex_unlock(&ifmgd->mtx);
2080 mutex_lock(&local->work_mtx);
2081 list_for_each_entry(wk, &local->work_list, list) {
2082 if (wk->sdata != sdata)
2085 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2086 wk->type != IEEE80211_WORK_AUTH)
2089 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2092 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2093 list_del_rcu(&wk->list);
2097 mutex_unlock(&local->work_mtx);
2100 * If somebody requests authentication and we haven't
2101 * sent out an auth frame yet there's no need to send
2102 * out a deauth frame either. If the state was PROBE,
2103 * then this is the case. If it's AUTH we have sent a
2104 * frame, and if it's IDLE we have completed the auth
2108 __cfg80211_auth_canceled(sdata->dev, bssid);
2113 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2114 sdata->name, bssid, req->reason_code);
2116 ieee80211_send_deauth_disassoc(sdata, bssid,
2117 IEEE80211_STYPE_DEAUTH, req->reason_code,
2120 ieee80211_recalc_idle(sdata->local);
2125 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2126 struct cfg80211_disassoc_request *req,
2129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2131 mutex_lock(&ifmgd->mtx);
2134 * cfg80211 should catch this ... but it's racy since
2135 * we can receive a disassoc frame, process it, hand it
2136 * to cfg80211 while that's in a locked section already
2137 * trying to tell us that the user wants to disconnect.
2139 if (ifmgd->associated != req->bss) {
2140 mutex_unlock(&ifmgd->mtx);
2144 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2145 sdata->name, req->bss->bssid, req->reason_code);
2147 ieee80211_set_disassoc(sdata);
2149 mutex_unlock(&ifmgd->mtx);
2151 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2152 IEEE80211_STYPE_DISASSOC, req->reason_code,
2155 ieee80211_recalc_idle(sdata->local);
2160 int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
2161 struct ieee80211_channel *chan,
2162 enum nl80211_channel_type channel_type,
2163 const u8 *buf, size_t len, u64 *cookie)
2165 struct ieee80211_local *local = sdata->local;
2166 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2167 struct sk_buff *skb;
2169 /* Check that we are on the requested channel for transmission */
2170 if ((chan != local->tmp_channel ||
2171 channel_type != local->tmp_channel_type) &&
2172 (chan != local->oper_channel ||
2173 channel_type != local->oper_channel_type))
2176 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2179 skb_reserve(skb, local->hw.extra_tx_headroom);
2181 memcpy(skb_put(skb, len), buf, len);
2183 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
2184 IEEE80211_SKB_CB(skb)->flags |=
2185 IEEE80211_TX_INTFL_DONT_ENCRYPT;
2186 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2187 IEEE80211_TX_CTL_REQ_TX_STATUS;
2188 skb->dev = sdata->dev;
2189 ieee80211_tx_skb(sdata, skb);
2191 *cookie = (unsigned long) skb;
2195 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2196 enum nl80211_cqm_rssi_threshold_event rssi_event,
2199 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2201 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2203 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);