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 if (local->tmp_channel)
179 local->tmp_channel_type = channel_type;
180 local->oper_channel_type = channel_type;
183 /* channel_type change automatically detected */
184 ieee80211_hw_config(local, 0);
187 sta = sta_info_get(sdata, bssid);
189 rate_control_rate_update(local, sband, sta,
190 IEEE80211_RC_HT_CHANGED,
191 local->oper_channel_type);
199 ht_opmode = le16_to_cpu(hti->operation_mode);
201 /* if bss configuration changed store the new one */
202 if (!sdata->ht_opmode_valid ||
203 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
204 changed |= BSS_CHANGED_HT;
205 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
206 sdata->ht_opmode_valid = true;
212 /* frame sending functions */
214 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
215 const u8 *bssid, u16 stype, u16 reason,
216 void *cookie, bool send_frame)
218 struct ieee80211_local *local = sdata->local;
219 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
221 struct ieee80211_mgmt *mgmt;
223 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
225 printk(KERN_DEBUG "%s: failed to allocate buffer for "
226 "deauth/disassoc frame\n", sdata->name);
229 skb_reserve(skb, local->hw.extra_tx_headroom);
231 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
233 memcpy(mgmt->da, bssid, ETH_ALEN);
234 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
235 memcpy(mgmt->bssid, bssid, ETH_ALEN);
236 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
238 /* u.deauth.reason_code == u.disassoc.reason_code */
239 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
241 if (stype == IEEE80211_STYPE_DEAUTH)
243 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
245 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
248 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
250 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
251 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
252 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
255 ieee80211_tx_skb(sdata, skb);
260 void ieee80211_send_pspoll(struct ieee80211_local *local,
261 struct ieee80211_sub_if_data *sdata)
263 struct ieee80211_pspoll *pspoll;
266 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
270 pspoll = (struct ieee80211_pspoll *) skb->data;
271 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
273 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
274 ieee80211_tx_skb(sdata, skb);
277 void ieee80211_send_nullfunc(struct ieee80211_local *local,
278 struct ieee80211_sub_if_data *sdata,
282 struct ieee80211_hdr_3addr *nullfunc;
284 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
288 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
290 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
292 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
293 ieee80211_tx_skb(sdata, skb);
296 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
297 struct ieee80211_sub_if_data *sdata)
300 struct ieee80211_hdr *nullfunc;
303 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
306 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
308 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
309 "nullfunc frame\n", sdata->name);
312 skb_reserve(skb, local->hw.extra_tx_headroom);
314 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
315 memset(nullfunc, 0, 30);
316 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
317 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
318 nullfunc->frame_control = fc;
319 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
320 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
321 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
322 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
324 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
325 ieee80211_tx_skb(sdata, skb);
328 /* spectrum management related things */
329 static void ieee80211_chswitch_work(struct work_struct *work)
331 struct ieee80211_sub_if_data *sdata =
332 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
333 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
335 if (!ieee80211_sdata_running(sdata))
338 mutex_lock(&ifmgd->mtx);
339 if (!ifmgd->associated)
342 sdata->local->oper_channel = sdata->local->csa_channel;
343 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
345 /* XXX: shouldn't really modify cfg80211-owned data! */
346 ifmgd->associated->channel = sdata->local->oper_channel;
348 ieee80211_wake_queues_by_reason(&sdata->local->hw,
349 IEEE80211_QUEUE_STOP_REASON_CSA);
351 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
352 mutex_unlock(&ifmgd->mtx);
355 static void ieee80211_chswitch_timer(unsigned long data)
357 struct ieee80211_sub_if_data *sdata =
358 (struct ieee80211_sub_if_data *) data;
359 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
361 if (sdata->local->quiescing) {
362 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
366 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
369 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
370 struct ieee80211_channel_sw_ie *sw_elem,
371 struct ieee80211_bss *bss)
373 struct cfg80211_bss *cbss =
374 container_of((void *)bss, struct cfg80211_bss, priv);
375 struct ieee80211_channel *new_ch;
376 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
377 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
379 ASSERT_MGD_MTX(ifmgd);
381 if (!ifmgd->associated)
384 if (sdata->local->scanning)
387 /* Disregard subsequent beacons if we are already running a timer
390 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
393 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
394 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
397 sdata->local->csa_channel = new_ch;
399 if (sw_elem->count <= 1) {
400 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
402 ieee80211_stop_queues_by_reason(&sdata->local->hw,
403 IEEE80211_QUEUE_STOP_REASON_CSA);
404 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
405 mod_timer(&ifmgd->chswitch_timer,
407 msecs_to_jiffies(sw_elem->count *
408 cbss->beacon_interval));
412 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
413 u16 capab_info, u8 *pwr_constr_elem,
414 u8 pwr_constr_elem_len)
416 struct ieee80211_conf *conf = &sdata->local->hw.conf;
418 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
421 /* Power constraint IE length should be 1 octet */
422 if (pwr_constr_elem_len != 1)
425 if ((*pwr_constr_elem <= conf->channel->max_power) &&
426 (*pwr_constr_elem != sdata->local->power_constr_level)) {
427 sdata->local->power_constr_level = *pwr_constr_elem;
428 ieee80211_hw_config(sdata->local, 0);
433 static void ieee80211_enable_ps(struct ieee80211_local *local,
434 struct ieee80211_sub_if_data *sdata)
436 struct ieee80211_conf *conf = &local->hw.conf;
439 * If we are scanning right now then the parameters will
440 * take effect when scan finishes.
445 if (conf->dynamic_ps_timeout > 0 &&
446 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
447 mod_timer(&local->dynamic_ps_timer, jiffies +
448 msecs_to_jiffies(conf->dynamic_ps_timeout));
450 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
451 ieee80211_send_nullfunc(local, sdata, 1);
453 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
454 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
457 conf->flags |= IEEE80211_CONF_PS;
458 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
462 static void ieee80211_change_ps(struct ieee80211_local *local)
464 struct ieee80211_conf *conf = &local->hw.conf;
466 if (local->ps_sdata) {
467 ieee80211_enable_ps(local, local->ps_sdata);
468 } else if (conf->flags & IEEE80211_CONF_PS) {
469 conf->flags &= ~IEEE80211_CONF_PS;
470 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
471 del_timer_sync(&local->dynamic_ps_timer);
472 cancel_work_sync(&local->dynamic_ps_enable_work);
476 /* need to hold RTNL or interface lock */
477 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
479 struct ieee80211_sub_if_data *sdata, *found = NULL;
482 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
483 local->ps_sdata = NULL;
487 if (!list_empty(&local->work_list)) {
488 local->ps_sdata = NULL;
492 list_for_each_entry(sdata, &local->interfaces, list) {
493 if (!ieee80211_sdata_running(sdata))
495 if (sdata->vif.type != NL80211_IFTYPE_STATION)
501 if (count == 1 && found->u.mgd.powersave &&
502 found->u.mgd.associated &&
503 found->u.mgd.associated->beacon_ies &&
504 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
505 IEEE80211_STA_CONNECTION_POLL))) {
509 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
511 beaconint_us = ieee80211_tu_to_usec(
512 found->vif.bss_conf.beacon_int);
514 if (beaconint_us > latency) {
515 local->ps_sdata = NULL;
517 struct ieee80211_bss *bss;
521 bss = (void *)found->u.mgd.associated->priv;
522 dtimper = bss->dtim_period;
524 /* If the TIM IE is invalid, pretend the value is 1 */
527 else if (dtimper > 1)
528 maxslp = min_t(int, dtimper,
529 latency / beaconint_us);
531 local->hw.conf.max_sleep_period = maxslp;
532 local->hw.conf.ps_dtim_period = dtimper;
533 local->ps_sdata = found;
536 local->ps_sdata = NULL;
540 ieee80211_change_ps(local);
543 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
545 struct ieee80211_local *local =
546 container_of(work, struct ieee80211_local,
547 dynamic_ps_disable_work);
549 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
550 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
551 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
554 ieee80211_wake_queues_by_reason(&local->hw,
555 IEEE80211_QUEUE_STOP_REASON_PS);
558 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
560 struct ieee80211_local *local =
561 container_of(work, struct ieee80211_local,
562 dynamic_ps_enable_work);
563 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
564 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
566 /* can only happen when PS was just disabled anyway */
570 if (local->hw.conf.flags & IEEE80211_CONF_PS)
573 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
574 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
575 ieee80211_send_nullfunc(local, sdata, 1);
577 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
578 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
579 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
580 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
581 local->hw.conf.flags |= IEEE80211_CONF_PS;
582 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
586 void ieee80211_dynamic_ps_timer(unsigned long data)
588 struct ieee80211_local *local = (void *) data;
590 if (local->quiescing || local->suspended)
593 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
597 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
598 struct ieee80211_if_managed *ifmgd,
599 u8 *wmm_param, size_t wmm_param_len)
601 struct ieee80211_tx_queue_params params;
604 u8 *pos, uapsd_queues = 0;
606 if (!local->ops->conf_tx)
609 if (local->hw.queues < 4)
615 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
618 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
619 uapsd_queues = local->uapsd_queues;
621 count = wmm_param[6] & 0x0f;
622 if (count == ifmgd->wmm_last_param_set)
624 ifmgd->wmm_last_param_set = count;
627 left = wmm_param_len - 8;
629 memset(¶ms, 0, sizeof(params));
632 for (; left >= 4; left -= 4, pos += 4) {
633 int aci = (pos[0] >> 5) & 0x03;
634 int acm = (pos[0] >> 4) & 0x01;
642 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
643 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
649 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
650 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
656 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
657 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
664 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
665 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
670 params.aifs = pos[0] & 0x0f;
671 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
672 params.cw_min = ecw2cw(pos[1] & 0x0f);
673 params.txop = get_unaligned_le16(pos + 2);
674 params.uapsd = uapsd;
676 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
677 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
678 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
679 wiphy_name(local->hw.wiphy), queue, aci, acm,
680 params.aifs, params.cw_min, params.cw_max, params.txop,
683 if (drv_conf_tx(local, queue, ¶ms))
684 printk(KERN_DEBUG "%s: failed to set TX queue "
685 "parameters for queue %d\n",
686 wiphy_name(local->hw.wiphy), queue);
689 /* enable WMM or activate new settings */
690 local->hw.conf.flags |= IEEE80211_CONF_QOS;
691 drv_config(local, IEEE80211_CONF_CHANGE_QOS);
694 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
695 u16 capab, bool erp_valid, u8 erp)
697 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
700 bool use_short_preamble;
704 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
705 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
707 use_protection = false;
708 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
711 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
712 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
713 use_short_slot = true;
715 if (use_protection != bss_conf->use_cts_prot) {
716 bss_conf->use_cts_prot = use_protection;
717 changed |= BSS_CHANGED_ERP_CTS_PROT;
720 if (use_short_preamble != bss_conf->use_short_preamble) {
721 bss_conf->use_short_preamble = use_short_preamble;
722 changed |= BSS_CHANGED_ERP_PREAMBLE;
725 if (use_short_slot != bss_conf->use_short_slot) {
726 bss_conf->use_short_slot = use_short_slot;
727 changed |= BSS_CHANGED_ERP_SLOT;
733 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
734 struct cfg80211_bss *cbss,
735 u32 bss_info_changed)
737 struct ieee80211_bss *bss = (void *)cbss->priv;
738 struct ieee80211_local *local = sdata->local;
740 bss_info_changed |= BSS_CHANGED_ASSOC;
741 /* set timing information */
742 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
743 sdata->vif.bss_conf.timestamp = cbss->tsf;
745 bss_info_changed |= BSS_CHANGED_BEACON_INT;
746 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
747 cbss->capability, bss->has_erp_value, bss->erp_value);
749 sdata->u.mgd.associated = cbss;
750 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
752 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
754 /* just to be sure */
755 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
756 IEEE80211_STA_BEACON_POLL);
759 * Always handle WMM once after association regardless
760 * of the first value the AP uses. Setting -1 here has
761 * that effect because the AP values is an unsigned
764 sdata->u.mgd.wmm_last_param_set = -1;
766 ieee80211_led_assoc(local, 1);
768 sdata->vif.bss_conf.assoc = 1;
770 * For now just always ask the driver to update the basic rateset
771 * when we have associated, we aren't checking whether it actually
774 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
776 /* And the BSSID changed - we're associated now */
777 bss_info_changed |= BSS_CHANGED_BSSID;
779 /* Tell the driver to monitor connection quality (if supported) */
780 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
781 sdata->vif.bss_conf.cqm_rssi_thold)
782 bss_info_changed |= BSS_CHANGED_CQM;
784 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
786 mutex_lock(&local->iflist_mtx);
787 ieee80211_recalc_ps(local, -1);
788 ieee80211_recalc_smps(local, sdata);
789 mutex_unlock(&local->iflist_mtx);
791 netif_tx_start_all_queues(sdata->dev);
792 netif_carrier_on(sdata->dev);
795 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
798 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
799 struct ieee80211_local *local = sdata->local;
800 struct sta_info *sta;
801 u32 changed = 0, config_changed = 0;
804 ASSERT_MGD_MTX(ifmgd);
806 if (WARN_ON(!ifmgd->associated))
809 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
811 ifmgd->associated = NULL;
812 memset(ifmgd->bssid, 0, ETH_ALEN);
815 * we need to commit the associated = NULL change because the
816 * scan code uses that to determine whether this iface should
817 * go to/wake up from powersave or not -- and could otherwise
818 * wake the queues erroneously.
823 * Thus, we can only afterwards stop the queues -- to account
824 * for the case where another CPU is finishing a scan at this
825 * time -- we don't want the scan code to enable queues.
828 netif_tx_stop_all_queues(sdata->dev);
829 netif_carrier_off(sdata->dev);
832 sta = sta_info_get(sdata, bssid);
834 set_sta_flags(sta, WLAN_STA_DISASSOC);
835 ieee80211_sta_tear_down_BA_sessions(sta);
839 changed |= ieee80211_reset_erp_info(sdata);
841 ieee80211_led_assoc(local, 0);
842 changed |= BSS_CHANGED_ASSOC;
843 sdata->vif.bss_conf.assoc = false;
845 ieee80211_set_wmm_default(sdata);
847 /* channel(_type) changes are handled by ieee80211_hw_config */
848 local->oper_channel_type = NL80211_CHAN_NO_HT;
850 /* on the next assoc, re-program HT parameters */
851 sdata->ht_opmode_valid = false;
853 local->power_constr_level = 0;
855 del_timer_sync(&local->dynamic_ps_timer);
856 cancel_work_sync(&local->dynamic_ps_enable_work);
858 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
859 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
860 config_changed |= IEEE80211_CONF_CHANGE_PS;
863 ieee80211_hw_config(local, config_changed);
865 /* And the BSSID changed -- not very interesting here */
866 changed |= BSS_CHANGED_BSSID;
867 ieee80211_bss_info_change_notify(sdata, changed);
870 sta_info_destroy_addr(sdata, bssid);
873 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
874 struct ieee80211_hdr *hdr)
877 * We can postpone the mgd.timer whenever receiving unicast frames
878 * from AP because we know that the connection is working both ways
879 * at that time. But multicast frames (and hence also beacons) must
880 * be ignored here, because we need to trigger the timer during
881 * data idle periods for sending the periodic probe request to the
882 * AP we're connected to.
884 if (is_multicast_ether_addr(hdr->addr1))
887 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
890 mod_timer(&sdata->u.mgd.conn_mon_timer,
891 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
894 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
896 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
899 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
900 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
901 ssid + 2, ssid[1], NULL, 0);
903 ifmgd->probe_send_count++;
904 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
905 run_again(ifmgd, ifmgd->probe_timeout);
908 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
911 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
912 bool already = false;
914 if (!ieee80211_sdata_running(sdata))
917 if (sdata->local->scanning)
920 if (sdata->local->tmp_channel)
923 mutex_lock(&ifmgd->mtx);
925 if (!ifmgd->associated)
928 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
929 if (beacon && net_ratelimit())
930 printk(KERN_DEBUG "%s: detected beacon loss from AP "
931 "- sending probe request\n", sdata->name);
935 * The driver/our work has already reported this event or the
936 * connection monitoring has kicked in and we have already sent
937 * a probe request. Or maybe the AP died and the driver keeps
938 * reporting until we disassociate...
940 * In either case we have to ignore the current call to this
941 * function (except for setting the correct probe reason bit)
942 * because otherwise we would reset the timer every time and
943 * never check whether we received a probe response!
945 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
946 IEEE80211_STA_CONNECTION_POLL))
950 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
952 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
957 mutex_lock(&sdata->local->iflist_mtx);
958 ieee80211_recalc_ps(sdata->local, -1);
959 mutex_unlock(&sdata->local->iflist_mtx);
961 ifmgd->probe_send_count = 0;
962 ieee80211_mgd_probe_ap_send(sdata);
964 mutex_unlock(&ifmgd->mtx);
967 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
969 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
970 struct ieee80211_local *local = sdata->local;
973 mutex_lock(&ifmgd->mtx);
974 if (!ifmgd->associated) {
975 mutex_unlock(&ifmgd->mtx);
979 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
981 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
983 ieee80211_set_disassoc(sdata, true);
984 ieee80211_recalc_idle(local);
985 mutex_unlock(&ifmgd->mtx);
987 * must be outside lock due to cfg80211,
988 * but that's not a problem.
990 ieee80211_send_deauth_disassoc(sdata, bssid,
991 IEEE80211_STYPE_DEAUTH,
992 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
996 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
998 struct ieee80211_sub_if_data *sdata =
999 container_of(work, struct ieee80211_sub_if_data,
1000 u.mgd.beacon_connection_loss_work);
1002 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1003 __ieee80211_connection_loss(sdata);
1005 ieee80211_mgd_probe_ap(sdata, true);
1008 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1010 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1011 struct ieee80211_hw *hw = &sdata->local->hw;
1013 trace_api_beacon_loss(sdata);
1015 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1016 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1018 EXPORT_SYMBOL(ieee80211_beacon_loss);
1020 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1022 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1023 struct ieee80211_hw *hw = &sdata->local->hw;
1025 trace_api_connection_loss(sdata);
1027 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1028 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1030 EXPORT_SYMBOL(ieee80211_connection_loss);
1033 static enum rx_mgmt_action __must_check
1034 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1035 struct ieee80211_mgmt *mgmt, size_t len)
1037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1038 const u8 *bssid = NULL;
1042 return RX_MGMT_NONE;
1044 ASSERT_MGD_MTX(ifmgd);
1046 bssid = ifmgd->associated->bssid;
1048 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1050 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1051 sdata->name, bssid, reason_code);
1053 ieee80211_set_disassoc(sdata, true);
1054 ieee80211_recalc_idle(sdata->local);
1056 return RX_MGMT_CFG80211_DEAUTH;
1060 static enum rx_mgmt_action __must_check
1061 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1062 struct ieee80211_mgmt *mgmt, size_t len)
1064 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1068 return RX_MGMT_NONE;
1070 ASSERT_MGD_MTX(ifmgd);
1072 if (WARN_ON(!ifmgd->associated))
1073 return RX_MGMT_NONE;
1075 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1076 return RX_MGMT_NONE;
1078 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1080 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1081 sdata->name, mgmt->sa, reason_code);
1083 ieee80211_set_disassoc(sdata, true);
1084 ieee80211_recalc_idle(sdata->local);
1085 return RX_MGMT_CFG80211_DISASSOC;
1089 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1090 struct ieee80211_mgmt *mgmt, size_t len)
1092 struct ieee80211_sub_if_data *sdata = wk->sdata;
1093 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1094 struct ieee80211_local *local = sdata->local;
1095 struct ieee80211_supported_band *sband;
1096 struct sta_info *sta;
1097 struct cfg80211_bss *cbss = wk->assoc.bss;
1099 u32 rates, basic_rates;
1100 u16 capab_info, aid;
1101 struct ieee802_11_elems elems;
1102 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1105 bool have_higher_than_11mbit = false;
1106 u16 ap_ht_cap_flags;
1108 /* AssocResp and ReassocResp have identical structure */
1110 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1111 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1113 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1114 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1115 "set\n", sdata->name, aid);
1116 aid &= ~(BIT(15) | BIT(14));
1118 pos = mgmt->u.assoc_resp.variable;
1119 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1121 if (!elems.supp_rates) {
1122 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1129 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
1131 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1132 " the AP\n", sdata->name);
1136 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1138 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1139 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1143 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1145 for (i = 0; i < elems.supp_rates_len; i++) {
1146 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1147 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1150 have_higher_than_11mbit = true;
1152 for (j = 0; j < sband->n_bitrates; j++) {
1153 if (sband->bitrates[j].bitrate == rate) {
1156 basic_rates |= BIT(j);
1162 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1163 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1164 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1167 have_higher_than_11mbit = true;
1169 for (j = 0; j < sband->n_bitrates; j++) {
1170 if (sband->bitrates[j].bitrate == rate) {
1173 basic_rates |= BIT(j);
1179 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1180 sdata->vif.bss_conf.basic_rates = basic_rates;
1182 /* cf. IEEE 802.11 9.2.12 */
1183 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1184 have_higher_than_11mbit)
1185 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1187 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1189 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1190 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1191 elems.ht_cap_elem, &sta->sta.ht_cap);
1193 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1195 rate_control_rate_init(sta);
1197 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1198 set_sta_flags(sta, WLAN_STA_MFP);
1200 if (elems.wmm_param)
1201 set_sta_flags(sta, WLAN_STA_WME);
1203 err = sta_info_insert(sta);
1206 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1207 " the AP (error %d)\n", sdata->name, err);
1211 if (elems.wmm_param)
1212 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1213 elems.wmm_param_len);
1215 ieee80211_set_wmm_default(sdata);
1217 local->oper_channel = wk->chan;
1219 if (elems.ht_info_elem && elems.wmm_param &&
1220 (sdata->local->hw.queues >= 4) &&
1221 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1222 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1223 cbss->bssid, ap_ht_cap_flags);
1225 /* set AID and assoc capability,
1226 * ieee80211_set_associated() will tell the driver */
1227 bss_conf->aid = aid;
1228 bss_conf->assoc_capability = capab_info;
1229 ieee80211_set_associated(sdata, cbss, changed);
1232 * If we're using 4-addr mode, let the AP know that we're
1233 * doing so, so that it can create the STA VLAN on its side
1235 if (ifmgd->use_4addr)
1236 ieee80211_send_4addr_nullfunc(local, sdata);
1239 * Start timer to probe the connection to the AP now.
1240 * Also start the timer that will detect beacon loss.
1242 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1243 mod_beacon_timer(sdata);
1249 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1250 struct ieee80211_mgmt *mgmt,
1252 struct ieee80211_rx_status *rx_status,
1253 struct ieee802_11_elems *elems,
1256 struct ieee80211_local *local = sdata->local;
1258 struct ieee80211_bss *bss;
1259 struct ieee80211_channel *channel;
1260 bool need_ps = false;
1262 if (sdata->u.mgd.associated) {
1263 bss = (void *)sdata->u.mgd.associated->priv;
1264 /* not previously set so we may need to recalc */
1265 need_ps = !bss->dtim_period;
1268 if (elems->ds_params && elems->ds_params_len == 1)
1269 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1271 freq = rx_status->freq;
1273 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1275 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1278 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1281 ieee80211_rx_bss_put(local, bss);
1283 if (!sdata->u.mgd.associated)
1287 mutex_lock(&local->iflist_mtx);
1288 ieee80211_recalc_ps(local, -1);
1289 mutex_unlock(&local->iflist_mtx);
1292 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1293 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1295 struct ieee80211_channel_sw_ie *sw_elem =
1296 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1297 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1302 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1303 struct sk_buff *skb)
1305 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1306 struct ieee80211_if_managed *ifmgd;
1307 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1308 size_t baselen, len = skb->len;
1309 struct ieee802_11_elems elems;
1311 ifmgd = &sdata->u.mgd;
1313 ASSERT_MGD_MTX(ifmgd);
1315 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1316 return; /* ignore ProbeResp to foreign address */
1318 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1322 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1325 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1327 if (ifmgd->associated &&
1328 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
1329 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1330 IEEE80211_STA_CONNECTION_POLL)) {
1331 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1332 IEEE80211_STA_BEACON_POLL);
1333 mutex_lock(&sdata->local->iflist_mtx);
1334 ieee80211_recalc_ps(sdata->local, -1);
1335 mutex_unlock(&sdata->local->iflist_mtx);
1337 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1341 * We've received a probe response, but are not sure whether
1342 * we have or will be receiving any beacons or data, so let's
1343 * schedule the timers again, just in case.
1345 mod_beacon_timer(sdata);
1347 mod_timer(&ifmgd->conn_mon_timer,
1348 round_jiffies_up(jiffies +
1349 IEEE80211_CONNECTION_IDLE_TIME));
1354 * This is the canonical list of information elements we care about,
1355 * the filter code also gives us all changes to the Microsoft OUI
1356 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1358 * We implement beacon filtering in software since that means we can
1359 * avoid processing the frame here and in cfg80211, and userspace
1360 * will not be able to tell whether the hardware supports it or not.
1362 * XXX: This list needs to be dynamic -- userspace needs to be able to
1363 * add items it requires. It also needs to be able to tell us to
1364 * look out for other vendor IEs.
1366 static const u64 care_about_ies =
1367 (1ULL << WLAN_EID_COUNTRY) |
1368 (1ULL << WLAN_EID_ERP_INFO) |
1369 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1370 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1371 (1ULL << WLAN_EID_HT_CAPABILITY) |
1372 (1ULL << WLAN_EID_HT_INFORMATION);
1374 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1375 struct ieee80211_mgmt *mgmt,
1377 struct ieee80211_rx_status *rx_status)
1379 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1380 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1382 struct ieee802_11_elems elems;
1383 struct ieee80211_local *local = sdata->local;
1385 bool erp_valid, directed_tim = false;
1390 ASSERT_MGD_MTX(ifmgd);
1392 /* Process beacon from the current BSS */
1393 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1397 if (rx_status->freq != local->hw.conf.channel->center_freq)
1401 * We might have received a number of frames, among them a
1402 * disassoc frame and a beacon...
1404 if (!ifmgd->associated)
1407 bssid = ifmgd->associated->bssid;
1410 * And in theory even frames from a different AP we were just
1411 * associated to a split-second ago!
1413 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1416 /* Track average RSSI from the Beacon frames of the current AP */
1417 ifmgd->last_beacon_signal = rx_status->signal;
1418 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1419 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1420 ifmgd->ave_beacon_signal = rx_status->signal;
1421 ifmgd->last_cqm_event_signal = 0;
1423 ifmgd->ave_beacon_signal =
1424 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1425 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1426 ifmgd->ave_beacon_signal) / 16;
1428 if (bss_conf->cqm_rssi_thold &&
1429 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1430 int sig = ifmgd->ave_beacon_signal / 16;
1431 int last_event = ifmgd->last_cqm_event_signal;
1432 int thold = bss_conf->cqm_rssi_thold;
1433 int hyst = bss_conf->cqm_rssi_hyst;
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_LOW,
1441 } else if (sig > thold &&
1442 (last_event == 0 || sig > last_event + hyst)) {
1443 ifmgd->last_cqm_event_signal = sig;
1444 ieee80211_cqm_rssi_notify(
1446 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1451 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1452 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1453 if (net_ratelimit()) {
1454 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1455 "to a received beacon\n", sdata->name);
1458 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1459 mutex_lock(&local->iflist_mtx);
1460 ieee80211_recalc_ps(local, -1);
1461 mutex_unlock(&local->iflist_mtx);
1465 * Push the beacon loss detection into the future since
1466 * we are processing a beacon from the AP just now.
1468 mod_beacon_timer(sdata);
1470 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1471 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1472 len - baselen, &elems,
1473 care_about_ies, ncrc);
1475 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1476 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1479 if (ncrc != ifmgd->beacon_crc) {
1480 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1483 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1484 elems.wmm_param_len);
1487 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1489 if (local->hw.conf.dynamic_ps_timeout > 0) {
1490 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1491 ieee80211_hw_config(local,
1492 IEEE80211_CONF_CHANGE_PS);
1493 ieee80211_send_nullfunc(local, sdata, 0);
1495 local->pspolling = true;
1498 * Here is assumed that the driver will be
1499 * able to send ps-poll frame and receive a
1500 * response even though power save mode is
1501 * enabled, but some drivers might require
1502 * to disable power save here. This needs
1503 * to be investigated.
1505 ieee80211_send_pspoll(local, sdata);
1510 if (ncrc == ifmgd->beacon_crc)
1512 ifmgd->beacon_crc = ncrc;
1514 if (elems.erp_info && elems.erp_info_len >= 1) {
1516 erp_value = elems.erp_info[0];
1520 changed |= ieee80211_handle_bss_capability(sdata,
1521 le16_to_cpu(mgmt->u.beacon.capab_info),
1522 erp_valid, erp_value);
1525 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1526 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1527 struct sta_info *sta;
1528 struct ieee80211_supported_band *sband;
1529 u16 ap_ht_cap_flags;
1533 sta = sta_info_get(sdata, bssid);
1534 if (WARN_ON(!sta)) {
1539 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1541 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1542 elems.ht_cap_elem, &sta->sta.ht_cap);
1544 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1548 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1549 bssid, ap_ht_cap_flags);
1552 /* Note: country IE parsing is done for us by cfg80211 */
1553 if (elems.country_elem) {
1554 /* TODO: IBSS also needs this */
1555 if (elems.pwr_constr_elem)
1556 ieee80211_handle_pwr_constr(sdata,
1557 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1558 elems.pwr_constr_elem,
1559 elems.pwr_constr_elem_len);
1562 ieee80211_bss_info_change_notify(sdata, changed);
1565 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1566 struct sk_buff *skb)
1568 struct ieee80211_local *local = sdata->local;
1569 struct ieee80211_mgmt *mgmt;
1573 return RX_DROP_MONITOR;
1575 mgmt = (struct ieee80211_mgmt *) skb->data;
1576 fc = le16_to_cpu(mgmt->frame_control);
1578 switch (fc & IEEE80211_FCTL_STYPE) {
1579 case IEEE80211_STYPE_PROBE_RESP:
1580 case IEEE80211_STYPE_BEACON:
1581 case IEEE80211_STYPE_DEAUTH:
1582 case IEEE80211_STYPE_DISASSOC:
1583 case IEEE80211_STYPE_ACTION:
1584 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1585 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1589 return RX_DROP_MONITOR;
1592 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1593 struct sk_buff *skb)
1595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1596 struct ieee80211_rx_status *rx_status;
1597 struct ieee80211_mgmt *mgmt;
1598 enum rx_mgmt_action rma = RX_MGMT_NONE;
1601 rx_status = (struct ieee80211_rx_status *) skb->cb;
1602 mgmt = (struct ieee80211_mgmt *) skb->data;
1603 fc = le16_to_cpu(mgmt->frame_control);
1605 mutex_lock(&ifmgd->mtx);
1607 if (ifmgd->associated &&
1608 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1609 switch (fc & IEEE80211_FCTL_STYPE) {
1610 case IEEE80211_STYPE_BEACON:
1611 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1614 case IEEE80211_STYPE_PROBE_RESP:
1615 ieee80211_rx_mgmt_probe_resp(sdata, skb);
1617 case IEEE80211_STYPE_DEAUTH:
1618 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1620 case IEEE80211_STYPE_DISASSOC:
1621 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1623 case IEEE80211_STYPE_ACTION:
1624 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1627 ieee80211_sta_process_chanswitch(sdata,
1628 &mgmt->u.action.u.chan_switch.sw_elem,
1629 (void *)ifmgd->associated->priv);
1632 mutex_unlock(&ifmgd->mtx);
1638 case RX_MGMT_CFG80211_DEAUTH:
1639 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1641 case RX_MGMT_CFG80211_DISASSOC:
1642 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1645 WARN(1, "unexpected: %d", rma);
1650 mutex_unlock(&ifmgd->mtx);
1652 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
1653 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
1654 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1660 static void ieee80211_sta_timer(unsigned long data)
1662 struct ieee80211_sub_if_data *sdata =
1663 (struct ieee80211_sub_if_data *) data;
1664 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1665 struct ieee80211_local *local = sdata->local;
1667 if (local->quiescing) {
1668 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1672 ieee80211_queue_work(&local->hw, &ifmgd->work);
1675 static void ieee80211_sta_work(struct work_struct *work)
1677 struct ieee80211_sub_if_data *sdata =
1678 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1679 struct ieee80211_local *local = sdata->local;
1680 struct ieee80211_if_managed *ifmgd;
1681 struct sk_buff *skb;
1683 if (!ieee80211_sdata_running(sdata))
1686 if (local->scanning)
1689 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1693 * ieee80211_queue_work() should have picked up most cases,
1694 * here we'll pick the the rest.
1696 if (WARN(local->suspended, "STA MLME work scheduled while "
1697 "going to suspend\n"))
1700 ifmgd = &sdata->u.mgd;
1702 /* first process frames to avoid timing out while a frame is pending */
1703 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1704 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1706 /* then process the rest of the work */
1707 mutex_lock(&ifmgd->mtx);
1709 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1710 IEEE80211_STA_CONNECTION_POLL) &&
1711 ifmgd->associated) {
1714 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1715 if (time_is_after_jiffies(ifmgd->probe_timeout))
1716 run_again(ifmgd, ifmgd->probe_timeout);
1718 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1719 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1720 printk(KERN_DEBUG "No probe response from AP %pM"
1721 " after %dms, try %d\n", bssid,
1722 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1723 ifmgd->probe_send_count);
1725 ieee80211_mgd_probe_ap_send(sdata);
1728 * We actually lost the connection ... or did we?
1731 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1732 IEEE80211_STA_BEACON_POLL);
1733 printk(KERN_DEBUG "No probe response from AP %pM"
1734 " after %dms, disconnecting.\n",
1735 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
1736 ieee80211_set_disassoc(sdata, true);
1737 ieee80211_recalc_idle(local);
1738 mutex_unlock(&ifmgd->mtx);
1740 * must be outside lock due to cfg80211,
1741 * but that's not a problem.
1743 ieee80211_send_deauth_disassoc(sdata, bssid,
1744 IEEE80211_STYPE_DEAUTH,
1745 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1747 mutex_lock(&ifmgd->mtx);
1751 mutex_unlock(&ifmgd->mtx);
1754 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1756 struct ieee80211_sub_if_data *sdata =
1757 (struct ieee80211_sub_if_data *) data;
1758 struct ieee80211_local *local = sdata->local;
1760 if (local->quiescing)
1763 ieee80211_queue_work(&sdata->local->hw,
1764 &sdata->u.mgd.beacon_connection_loss_work);
1767 static void ieee80211_sta_conn_mon_timer(unsigned long data)
1769 struct ieee80211_sub_if_data *sdata =
1770 (struct ieee80211_sub_if_data *) data;
1771 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1772 struct ieee80211_local *local = sdata->local;
1774 if (local->quiescing)
1777 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
1780 static void ieee80211_sta_monitor_work(struct work_struct *work)
1782 struct ieee80211_sub_if_data *sdata =
1783 container_of(work, struct ieee80211_sub_if_data,
1784 u.mgd.monitor_work);
1786 ieee80211_mgd_probe_ap(sdata, false);
1789 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1791 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1792 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1793 IEEE80211_STA_CONNECTION_POLL);
1795 /* let's probe the connection once */
1796 ieee80211_queue_work(&sdata->local->hw,
1797 &sdata->u.mgd.monitor_work);
1798 /* and do all the other regular work too */
1799 ieee80211_queue_work(&sdata->local->hw,
1800 &sdata->u.mgd.work);
1805 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1807 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1810 * we need to use atomic bitops for the running bits
1811 * only because both timers might fire at the same
1812 * time -- the code here is properly synchronised.
1815 cancel_work_sync(&ifmgd->work);
1816 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
1817 if (del_timer_sync(&ifmgd->timer))
1818 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1820 cancel_work_sync(&ifmgd->chswitch_work);
1821 if (del_timer_sync(&ifmgd->chswitch_timer))
1822 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1824 cancel_work_sync(&ifmgd->monitor_work);
1825 /* these will just be re-established on connection */
1826 del_timer_sync(&ifmgd->conn_mon_timer);
1827 del_timer_sync(&ifmgd->bcn_mon_timer);
1830 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1832 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1834 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1835 add_timer(&ifmgd->timer);
1836 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1837 add_timer(&ifmgd->chswitch_timer);
1841 /* interface setup */
1842 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1844 struct ieee80211_if_managed *ifmgd;
1846 ifmgd = &sdata->u.mgd;
1847 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1848 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
1849 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1850 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1851 ieee80211_beacon_connection_loss_work);
1852 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1853 (unsigned long) sdata);
1854 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1855 (unsigned long) sdata);
1856 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1857 (unsigned long) sdata);
1858 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1859 (unsigned long) sdata);
1860 skb_queue_head_init(&ifmgd->skb_queue);
1864 mutex_init(&ifmgd->mtx);
1866 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1867 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1869 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1872 /* scan finished notification */
1873 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1875 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1877 /* Restart STA timers */
1879 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1880 ieee80211_restart_sta_timer(sdata);
1884 int ieee80211_max_network_latency(struct notifier_block *nb,
1885 unsigned long data, void *dummy)
1887 s32 latency_usec = (s32) data;
1888 struct ieee80211_local *local =
1889 container_of(nb, struct ieee80211_local,
1890 network_latency_notifier);
1892 mutex_lock(&local->iflist_mtx);
1893 ieee80211_recalc_ps(local, latency_usec);
1894 mutex_unlock(&local->iflist_mtx);
1900 static enum work_done_result
1901 ieee80211_probe_auth_done(struct ieee80211_work *wk,
1902 struct sk_buff *skb)
1905 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1906 return WORK_DONE_DESTROY;
1909 if (wk->type == IEEE80211_WORK_AUTH) {
1910 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1911 return WORK_DONE_DESTROY;
1914 mutex_lock(&wk->sdata->u.mgd.mtx);
1915 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1916 mutex_unlock(&wk->sdata->u.mgd.mtx);
1918 wk->type = IEEE80211_WORK_AUTH;
1919 wk->probe_auth.tries = 0;
1920 return WORK_DONE_REQUEUE;
1923 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1924 struct cfg80211_auth_request *req)
1927 struct ieee80211_work *wk;
1930 if (req->local_state_change)
1931 return 0; /* no need to update mac80211 state */
1933 switch (req->auth_type) {
1934 case NL80211_AUTHTYPE_OPEN_SYSTEM:
1935 auth_alg = WLAN_AUTH_OPEN;
1937 case NL80211_AUTHTYPE_SHARED_KEY:
1938 auth_alg = WLAN_AUTH_SHARED_KEY;
1940 case NL80211_AUTHTYPE_FT:
1941 auth_alg = WLAN_AUTH_FT;
1943 case NL80211_AUTHTYPE_NETWORK_EAP:
1944 auth_alg = WLAN_AUTH_LEAP;
1950 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1954 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
1956 if (req->ie && req->ie_len) {
1957 memcpy(wk->ie, req->ie, req->ie_len);
1958 wk->ie_len = req->ie_len;
1961 if (req->key && req->key_len) {
1962 wk->probe_auth.key_len = req->key_len;
1963 wk->probe_auth.key_idx = req->key_idx;
1964 memcpy(wk->probe_auth.key, req->key, req->key_len);
1967 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
1968 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
1969 wk->probe_auth.ssid_len = ssid[1];
1971 wk->probe_auth.algorithm = auth_alg;
1972 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
1974 /* if we already have a probe, don't probe again */
1975 if (req->bss->proberesp_ies)
1976 wk->type = IEEE80211_WORK_AUTH;
1978 wk->type = IEEE80211_WORK_DIRECT_PROBE;
1979 wk->chan = req->bss->channel;
1981 wk->done = ieee80211_probe_auth_done;
1983 ieee80211_add_work(wk);
1987 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
1988 struct sk_buff *skb)
1990 struct ieee80211_mgmt *mgmt;
1994 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
1995 return WORK_DONE_DESTROY;
1998 mgmt = (void *)skb->data;
1999 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2001 if (status == WLAN_STATUS_SUCCESS) {
2002 mutex_lock(&wk->sdata->u.mgd.mtx);
2003 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2004 mutex_unlock(&wk->sdata->u.mgd.mtx);
2005 /* oops -- internal error -- send timeout for now */
2006 cfg80211_send_assoc_timeout(wk->sdata->dev,
2008 return WORK_DONE_DESTROY;
2010 mutex_unlock(&wk->sdata->u.mgd.mtx);
2013 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2014 return WORK_DONE_DESTROY;
2017 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2018 struct cfg80211_assoc_request *req)
2020 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2021 struct ieee80211_bss *bss = (void *)req->bss->priv;
2022 struct ieee80211_work *wk;
2026 mutex_lock(&ifmgd->mtx);
2027 if (ifmgd->associated) {
2028 if (!req->prev_bssid ||
2029 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2032 * We are already associated and the request was not a
2033 * reassociation request from the current BSS, so
2036 mutex_unlock(&ifmgd->mtx);
2040 /* Trying to reassociate - clear previous association state */
2041 ieee80211_set_disassoc(sdata, true);
2043 mutex_unlock(&ifmgd->mtx);
2045 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2049 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2050 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2052 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2053 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2054 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2055 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2056 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2059 if (req->ie && req->ie_len) {
2060 memcpy(wk->ie, req->ie, req->ie_len);
2061 wk->ie_len = req->ie_len;
2065 wk->assoc.bss = req->bss;
2067 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2069 /* new association always uses requested smps mode */
2070 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2071 if (ifmgd->powersave)
2072 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2074 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2076 ifmgd->ap_smps = ifmgd->req_smps;
2078 wk->assoc.smps = ifmgd->ap_smps;
2080 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2081 * We still associate in non-HT mode (11a/b/g) if any one of these
2082 * ciphers is configured as pairwise.
2083 * We can set this to true for non-11n hardware, that'll be checked
2084 * separately along with the peer capabilities.
2086 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2087 wk->assoc.capability = req->bss->capability;
2088 wk->assoc.wmm_used = bss->wmm_used;
2089 wk->assoc.supp_rates = bss->supp_rates;
2090 wk->assoc.supp_rates_len = bss->supp_rates_len;
2091 wk->assoc.ht_information_ie =
2092 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2094 if (bss->wmm_used && bss->uapsd_supported &&
2095 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2096 wk->assoc.uapsd_used = true;
2097 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2099 wk->assoc.uapsd_used = false;
2100 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2103 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2104 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2105 wk->assoc.ssid_len = ssid[1];
2107 if (req->prev_bssid)
2108 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2110 wk->type = IEEE80211_WORK_ASSOC;
2111 wk->chan = req->bss->channel;
2113 wk->done = ieee80211_assoc_done;
2116 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2117 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2119 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2120 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2123 if (req->crypto.control_port)
2124 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2126 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2128 ieee80211_add_work(wk);
2132 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2133 struct cfg80211_deauth_request *req,
2136 struct ieee80211_local *local = sdata->local;
2137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2138 struct ieee80211_work *wk;
2139 const u8 *bssid = req->bss->bssid;
2141 mutex_lock(&ifmgd->mtx);
2143 if (ifmgd->associated == req->bss) {
2144 bssid = req->bss->bssid;
2145 ieee80211_set_disassoc(sdata, true);
2146 mutex_unlock(&ifmgd->mtx);
2148 bool not_auth_yet = false;
2150 mutex_unlock(&ifmgd->mtx);
2152 mutex_lock(&local->work_mtx);
2153 list_for_each_entry(wk, &local->work_list, list) {
2154 if (wk->sdata != sdata)
2157 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2158 wk->type != IEEE80211_WORK_AUTH)
2161 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2164 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2165 list_del_rcu(&wk->list);
2169 mutex_unlock(&local->work_mtx);
2172 * If somebody requests authentication and we haven't
2173 * sent out an auth frame yet there's no need to send
2174 * out a deauth frame either. If the state was PROBE,
2175 * then this is the case. If it's AUTH we have sent a
2176 * frame, and if it's IDLE we have completed the auth
2180 __cfg80211_auth_canceled(sdata->dev, bssid);
2185 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2186 sdata->name, bssid, req->reason_code);
2188 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2189 req->reason_code, cookie,
2190 !req->local_state_change);
2192 ieee80211_recalc_idle(sdata->local);
2197 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2198 struct cfg80211_disassoc_request *req,
2201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2204 mutex_lock(&ifmgd->mtx);
2207 * cfg80211 should catch this ... but it's racy since
2208 * we can receive a disassoc frame, process it, hand it
2209 * to cfg80211 while that's in a locked section already
2210 * trying to tell us that the user wants to disconnect.
2212 if (ifmgd->associated != req->bss) {
2213 mutex_unlock(&ifmgd->mtx);
2217 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2218 sdata->name, req->bss->bssid, req->reason_code);
2220 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2221 ieee80211_set_disassoc(sdata, false);
2223 mutex_unlock(&ifmgd->mtx);
2225 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2226 IEEE80211_STYPE_DISASSOC, req->reason_code,
2227 cookie, !req->local_state_change);
2228 sta_info_destroy_addr(sdata, bssid);
2230 ieee80211_recalc_idle(sdata->local);
2235 int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
2236 struct ieee80211_channel *chan,
2237 enum nl80211_channel_type channel_type,
2238 const u8 *buf, size_t len, u64 *cookie)
2240 struct ieee80211_local *local = sdata->local;
2241 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2242 struct sk_buff *skb;
2244 /* Check that we are on the requested channel for transmission */
2245 if ((chan != local->tmp_channel ||
2246 channel_type != local->tmp_channel_type) &&
2247 (chan != local->oper_channel ||
2248 channel_type != local->oper_channel_type))
2251 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2254 skb_reserve(skb, local->hw.extra_tx_headroom);
2256 memcpy(skb_put(skb, len), buf, len);
2258 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
2259 IEEE80211_SKB_CB(skb)->flags |=
2260 IEEE80211_TX_INTFL_DONT_ENCRYPT;
2261 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2262 IEEE80211_TX_CTL_REQ_TX_STATUS;
2263 skb->dev = sdata->dev;
2264 ieee80211_tx_skb(sdata, skb);
2266 *cookie = (unsigned long) skb;
2270 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2271 enum nl80211_cqm_rssi_threshold_event rssi_event,
2274 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2276 trace_api_cqm_rssi_notify(sdata, rssi_event);
2278 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2280 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);