2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/pm_qos_params.h>
21 #include <linux/crc32.h>
22 #include <net/mac80211.h>
23 #include <asm/unaligned.h>
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
30 #define IEEE80211_MAX_PROBE_TRIES 5
33 * beacon loss detection timeout
34 * XXX: should depend on beacon interval
36 #define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
38 * Time the connection can be idle before we probe
39 * it to see if we can still talk to the AP.
41 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
43 * Time we wait for a probe response after sending
44 * a probe request because of beacon loss or for
45 * checking the connection still works.
47 #define IEEE80211_PROBE_WAIT (HZ / 2)
50 * Weight given to the latest Beacon frame when calculating average signal
51 * strength for Beacon frames received in the current BSS. This must be
54 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
56 #define TMR_RUNNING_TIMER 0
57 #define TMR_RUNNING_CHANSW 1
60 * All cfg80211 functions have to be called outside a locked
61 * section so that they can acquire a lock themselves... This
62 * is much simpler than queuing up things in cfg80211, but we
63 * do need some indirection for that here.
66 /* no action required */
69 /* caller must call cfg80211_send_rx_auth() */
70 RX_MGMT_CFG80211_AUTH,
72 /* caller must call cfg80211_send_rx_assoc() */
73 RX_MGMT_CFG80211_ASSOC,
75 /* caller must call cfg80211_send_deauth() */
76 RX_MGMT_CFG80211_DEAUTH,
78 /* caller must call cfg80211_send_disassoc() */
79 RX_MGMT_CFG80211_DISASSOC,
81 /* caller must tell cfg80211 about internal error */
82 RX_MGMT_CFG80211_ASSOC_ERROR,
86 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
88 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
92 * We can have multiple work items (and connection probing)
93 * scheduling this timer, but we need to take care to only
94 * reschedule it when it should fire _earlier_ than it was
95 * asked for before, or if it's not pending right now. This
96 * function ensures that. Note that it then is required to
97 * run this function for all timeouts after the first one
98 * has happened -- the work that runs from this timer will
101 static void run_again(struct ieee80211_if_managed *ifmgd,
102 unsigned long timeout)
104 ASSERT_MGD_MTX(ifmgd);
106 if (!timer_pending(&ifmgd->timer) ||
107 time_before(timeout, ifmgd->timer.expires))
108 mod_timer(&ifmgd->timer, timeout);
111 static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
113 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
116 mod_timer(&sdata->u.mgd.bcn_mon_timer,
117 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
120 static int ecw2cw(int ecw)
122 return (1 << ecw) - 1;
126 * ieee80211_enable_ht should be called only after the operating band
127 * has been determined as ht configuration depends on the hw's
128 * HT abilities for a specific band.
130 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
131 struct ieee80211_ht_info *hti,
132 const u8 *bssid, u16 ap_ht_cap_flags)
134 struct ieee80211_local *local = sdata->local;
135 struct ieee80211_supported_band *sband;
136 struct sta_info *sta;
139 bool enable_ht = true, ht_changed;
140 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
142 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
144 /* HT is not supported */
145 if (!sband->ht_cap.ht_supported)
148 /* check that channel matches the right operating channel */
149 if (local->hw.conf.channel->center_freq !=
150 ieee80211_channel_to_frequency(hti->control_chan))
154 channel_type = NL80211_CHAN_HT20;
156 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
157 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
158 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
159 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
160 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
161 if (!(local->hw.conf.channel->flags &
162 IEEE80211_CHAN_NO_HT40PLUS))
163 channel_type = NL80211_CHAN_HT40PLUS;
165 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
166 if (!(local->hw.conf.channel->flags &
167 IEEE80211_CHAN_NO_HT40MINUS))
168 channel_type = NL80211_CHAN_HT40MINUS;
174 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
175 channel_type != local->hw.conf.channel_type;
177 local->oper_channel_type = channel_type;
180 /* channel_type change automatically detected */
181 ieee80211_hw_config(local, 0);
184 sta = sta_info_get(sdata, bssid);
186 rate_control_rate_update(local, sband, sta,
187 IEEE80211_RC_HT_CHANGED,
188 local->oper_channel_type);
196 ht_opmode = le16_to_cpu(hti->operation_mode);
198 /* if bss configuration changed store the new one */
199 if (!sdata->ht_opmode_valid ||
200 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
201 changed |= BSS_CHANGED_HT;
202 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
203 sdata->ht_opmode_valid = true;
209 /* frame sending functions */
211 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
212 const u8 *bssid, u16 stype, u16 reason,
213 void *cookie, bool send_frame)
215 struct ieee80211_local *local = sdata->local;
216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
218 struct ieee80211_mgmt *mgmt;
220 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
222 printk(KERN_DEBUG "%s: failed to allocate buffer for "
223 "deauth/disassoc frame\n", sdata->name);
226 skb_reserve(skb, local->hw.extra_tx_headroom);
228 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
230 memcpy(mgmt->da, bssid, ETH_ALEN);
231 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
232 memcpy(mgmt->bssid, bssid, ETH_ALEN);
233 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
235 /* u.deauth.reason_code == u.disassoc.reason_code */
236 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
238 if (stype == IEEE80211_STYPE_DEAUTH)
240 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
242 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
245 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
247 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
248 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
249 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
252 ieee80211_tx_skb(sdata, skb);
257 void ieee80211_send_pspoll(struct ieee80211_local *local,
258 struct ieee80211_sub_if_data *sdata)
260 struct ieee80211_pspoll *pspoll;
263 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
267 pspoll = (struct ieee80211_pspoll *) skb->data;
268 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
270 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
271 ieee80211_tx_skb(sdata, skb);
274 void ieee80211_send_nullfunc(struct ieee80211_local *local,
275 struct ieee80211_sub_if_data *sdata,
279 struct ieee80211_hdr_3addr *nullfunc;
281 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
285 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
287 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
289 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
290 ieee80211_tx_skb(sdata, skb);
293 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
294 struct ieee80211_sub_if_data *sdata)
297 struct ieee80211_hdr *nullfunc;
300 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
303 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
305 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
306 "nullfunc frame\n", sdata->name);
309 skb_reserve(skb, local->hw.extra_tx_headroom);
311 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
312 memset(nullfunc, 0, 30);
313 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
314 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
315 nullfunc->frame_control = fc;
316 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
317 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
318 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
319 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
321 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
322 ieee80211_tx_skb(sdata, skb);
325 /* spectrum management related things */
326 static void ieee80211_chswitch_work(struct work_struct *work)
328 struct ieee80211_sub_if_data *sdata =
329 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
332 if (!ieee80211_sdata_running(sdata))
335 mutex_lock(&ifmgd->mtx);
336 if (!ifmgd->associated)
339 sdata->local->oper_channel = sdata->local->csa_channel;
340 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
342 /* XXX: shouldn't really modify cfg80211-owned data! */
343 ifmgd->associated->channel = sdata->local->oper_channel;
345 ieee80211_wake_queues_by_reason(&sdata->local->hw,
346 IEEE80211_QUEUE_STOP_REASON_CSA);
348 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
349 mutex_unlock(&ifmgd->mtx);
352 static void ieee80211_chswitch_timer(unsigned long data)
354 struct ieee80211_sub_if_data *sdata =
355 (struct ieee80211_sub_if_data *) data;
356 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
358 if (sdata->local->quiescing) {
359 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
363 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
366 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
367 struct ieee80211_channel_sw_ie *sw_elem,
368 struct ieee80211_bss *bss)
370 struct cfg80211_bss *cbss =
371 container_of((void *)bss, struct cfg80211_bss, priv);
372 struct ieee80211_channel *new_ch;
373 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
374 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
376 ASSERT_MGD_MTX(ifmgd);
378 if (!ifmgd->associated)
381 if (sdata->local->scanning)
384 /* Disregard subsequent beacons if we are already running a timer
387 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
390 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
391 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
394 sdata->local->csa_channel = new_ch;
396 if (sw_elem->count <= 1) {
397 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
399 ieee80211_stop_queues_by_reason(&sdata->local->hw,
400 IEEE80211_QUEUE_STOP_REASON_CSA);
401 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
402 mod_timer(&ifmgd->chswitch_timer,
404 msecs_to_jiffies(sw_elem->count *
405 cbss->beacon_interval));
409 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
410 u16 capab_info, u8 *pwr_constr_elem,
411 u8 pwr_constr_elem_len)
413 struct ieee80211_conf *conf = &sdata->local->hw.conf;
415 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
418 /* Power constraint IE length should be 1 octet */
419 if (pwr_constr_elem_len != 1)
422 if ((*pwr_constr_elem <= conf->channel->max_power) &&
423 (*pwr_constr_elem != sdata->local->power_constr_level)) {
424 sdata->local->power_constr_level = *pwr_constr_elem;
425 ieee80211_hw_config(sdata->local, 0);
430 static void ieee80211_enable_ps(struct ieee80211_local *local,
431 struct ieee80211_sub_if_data *sdata)
433 struct ieee80211_conf *conf = &local->hw.conf;
436 * If we are scanning right now then the parameters will
437 * take effect when scan finishes.
442 if (conf->dynamic_ps_timeout > 0 &&
443 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
444 mod_timer(&local->dynamic_ps_timer, jiffies +
445 msecs_to_jiffies(conf->dynamic_ps_timeout));
447 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
448 ieee80211_send_nullfunc(local, sdata, 1);
450 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
451 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
454 conf->flags |= IEEE80211_CONF_PS;
455 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
459 static void ieee80211_change_ps(struct ieee80211_local *local)
461 struct ieee80211_conf *conf = &local->hw.conf;
463 if (local->ps_sdata) {
464 ieee80211_enable_ps(local, local->ps_sdata);
465 } else if (conf->flags & IEEE80211_CONF_PS) {
466 conf->flags &= ~IEEE80211_CONF_PS;
467 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
468 del_timer_sync(&local->dynamic_ps_timer);
469 cancel_work_sync(&local->dynamic_ps_enable_work);
473 /* need to hold RTNL or interface lock */
474 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
476 struct ieee80211_sub_if_data *sdata, *found = NULL;
479 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
480 local->ps_sdata = NULL;
484 if (!list_empty(&local->work_list)) {
485 local->ps_sdata = NULL;
489 list_for_each_entry(sdata, &local->interfaces, list) {
490 if (!ieee80211_sdata_running(sdata))
492 if (sdata->vif.type != NL80211_IFTYPE_STATION)
498 if (count == 1 && found->u.mgd.powersave &&
499 found->u.mgd.associated &&
500 found->u.mgd.associated->beacon_ies &&
501 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
502 IEEE80211_STA_CONNECTION_POLL))) {
506 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
508 beaconint_us = ieee80211_tu_to_usec(
509 found->vif.bss_conf.beacon_int);
511 if (beaconint_us > latency) {
512 local->ps_sdata = NULL;
514 struct ieee80211_bss *bss;
518 bss = (void *)found->u.mgd.associated->priv;
519 dtimper = bss->dtim_period;
521 /* If the TIM IE is invalid, pretend the value is 1 */
524 else if (dtimper > 1)
525 maxslp = min_t(int, dtimper,
526 latency / beaconint_us);
528 local->hw.conf.max_sleep_period = maxslp;
529 local->hw.conf.ps_dtim_period = dtimper;
530 local->ps_sdata = found;
533 local->ps_sdata = NULL;
537 ieee80211_change_ps(local);
540 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
542 struct ieee80211_local *local =
543 container_of(work, struct ieee80211_local,
544 dynamic_ps_disable_work);
546 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
547 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
548 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
551 ieee80211_wake_queues_by_reason(&local->hw,
552 IEEE80211_QUEUE_STOP_REASON_PS);
555 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
557 struct ieee80211_local *local =
558 container_of(work, struct ieee80211_local,
559 dynamic_ps_enable_work);
560 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
561 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
563 /* can only happen when PS was just disabled anyway */
567 if (local->hw.conf.flags & IEEE80211_CONF_PS)
570 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
571 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
572 ieee80211_send_nullfunc(local, sdata, 1);
574 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
575 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
576 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
577 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
578 local->hw.conf.flags |= IEEE80211_CONF_PS;
579 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
583 void ieee80211_dynamic_ps_timer(unsigned long data)
585 struct ieee80211_local *local = (void *) data;
587 if (local->quiescing || local->suspended)
590 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
594 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
595 struct ieee80211_if_managed *ifmgd,
596 u8 *wmm_param, size_t wmm_param_len)
598 struct ieee80211_tx_queue_params params;
601 u8 *pos, uapsd_queues = 0;
603 if (!local->ops->conf_tx)
606 if (local->hw.queues < 4)
612 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
615 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
616 uapsd_queues = local->uapsd_queues;
618 count = wmm_param[6] & 0x0f;
619 if (count == ifmgd->wmm_last_param_set)
621 ifmgd->wmm_last_param_set = count;
624 left = wmm_param_len - 8;
626 memset(¶ms, 0, sizeof(params));
629 for (; left >= 4; left -= 4, pos += 4) {
630 int aci = (pos[0] >> 5) & 0x03;
631 int acm = (pos[0] >> 4) & 0x01;
639 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
640 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
646 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
647 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
653 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
654 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
661 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
662 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
667 params.aifs = pos[0] & 0x0f;
668 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
669 params.cw_min = ecw2cw(pos[1] & 0x0f);
670 params.txop = get_unaligned_le16(pos + 2);
671 params.uapsd = uapsd;
673 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
674 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
675 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
676 wiphy_name(local->hw.wiphy), queue, aci, acm,
677 params.aifs, params.cw_min, params.cw_max, params.txop,
680 if (drv_conf_tx(local, queue, ¶ms))
681 printk(KERN_DEBUG "%s: failed to set TX queue "
682 "parameters for queue %d\n",
683 wiphy_name(local->hw.wiphy), queue);
686 /* enable WMM or activate new settings */
687 local->hw.conf.flags |= IEEE80211_CONF_QOS;
688 drv_config(local, IEEE80211_CONF_CHANGE_QOS);
691 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
692 u16 capab, bool erp_valid, u8 erp)
694 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
697 bool use_short_preamble;
701 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
702 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
704 use_protection = false;
705 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
708 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
709 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
710 use_short_slot = true;
712 if (use_protection != bss_conf->use_cts_prot) {
713 bss_conf->use_cts_prot = use_protection;
714 changed |= BSS_CHANGED_ERP_CTS_PROT;
717 if (use_short_preamble != bss_conf->use_short_preamble) {
718 bss_conf->use_short_preamble = use_short_preamble;
719 changed |= BSS_CHANGED_ERP_PREAMBLE;
722 if (use_short_slot != bss_conf->use_short_slot) {
723 bss_conf->use_short_slot = use_short_slot;
724 changed |= BSS_CHANGED_ERP_SLOT;
730 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
731 struct cfg80211_bss *cbss,
732 u32 bss_info_changed)
734 struct ieee80211_bss *bss = (void *)cbss->priv;
735 struct ieee80211_local *local = sdata->local;
737 bss_info_changed |= BSS_CHANGED_ASSOC;
738 /* set timing information */
739 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
740 sdata->vif.bss_conf.timestamp = cbss->tsf;
742 bss_info_changed |= BSS_CHANGED_BEACON_INT;
743 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
744 cbss->capability, bss->has_erp_value, bss->erp_value);
746 sdata->u.mgd.associated = cbss;
747 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
749 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
751 /* just to be sure */
752 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
753 IEEE80211_STA_BEACON_POLL);
756 * Always handle WMM once after association regardless
757 * of the first value the AP uses. Setting -1 here has
758 * that effect because the AP values is an unsigned
761 sdata->u.mgd.wmm_last_param_set = -1;
763 ieee80211_led_assoc(local, 1);
765 sdata->vif.bss_conf.assoc = 1;
767 * For now just always ask the driver to update the basic rateset
768 * when we have associated, we aren't checking whether it actually
771 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
773 /* And the BSSID changed - we're associated now */
774 bss_info_changed |= BSS_CHANGED_BSSID;
776 /* Tell the driver to monitor connection quality (if supported) */
777 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
778 sdata->vif.bss_conf.cqm_rssi_thold)
779 bss_info_changed |= BSS_CHANGED_CQM;
781 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
783 mutex_lock(&local->iflist_mtx);
784 ieee80211_recalc_ps(local, -1);
785 ieee80211_recalc_smps(local, sdata);
786 mutex_unlock(&local->iflist_mtx);
788 netif_tx_start_all_queues(sdata->dev);
789 netif_carrier_on(sdata->dev);
792 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
796 struct ieee80211_local *local = sdata->local;
797 struct sta_info *sta;
798 u32 changed = 0, config_changed = 0;
801 ASSERT_MGD_MTX(ifmgd);
803 if (WARN_ON(!ifmgd->associated))
806 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
808 ifmgd->associated = NULL;
809 memset(ifmgd->bssid, 0, ETH_ALEN);
812 * we need to commit the associated = NULL change because the
813 * scan code uses that to determine whether this iface should
814 * go to/wake up from powersave or not -- and could otherwise
815 * wake the queues erroneously.
820 * Thus, we can only afterwards stop the queues -- to account
821 * for the case where another CPU is finishing a scan at this
822 * time -- we don't want the scan code to enable queues.
825 netif_tx_stop_all_queues(sdata->dev);
826 netif_carrier_off(sdata->dev);
829 sta = sta_info_get(sdata, bssid);
831 set_sta_flags(sta, WLAN_STA_DISASSOC);
832 ieee80211_sta_tear_down_BA_sessions(sta);
836 changed |= ieee80211_reset_erp_info(sdata);
838 ieee80211_led_assoc(local, 0);
839 changed |= BSS_CHANGED_ASSOC;
840 sdata->vif.bss_conf.assoc = false;
842 ieee80211_set_wmm_default(sdata);
844 /* channel(_type) changes are handled by ieee80211_hw_config */
845 local->oper_channel_type = NL80211_CHAN_NO_HT;
847 /* on the next assoc, re-program HT parameters */
848 sdata->ht_opmode_valid = false;
850 local->power_constr_level = 0;
852 del_timer_sync(&local->dynamic_ps_timer);
853 cancel_work_sync(&local->dynamic_ps_enable_work);
855 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
856 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
857 config_changed |= IEEE80211_CONF_CHANGE_PS;
860 ieee80211_hw_config(local, config_changed);
862 /* And the BSSID changed -- not very interesting here */
863 changed |= BSS_CHANGED_BSSID;
864 ieee80211_bss_info_change_notify(sdata, changed);
867 sta_info_destroy_addr(sdata, bssid);
870 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
871 struct ieee80211_hdr *hdr)
874 * We can postpone the mgd.timer whenever receiving unicast frames
875 * from AP because we know that the connection is working both ways
876 * at that time. But multicast frames (and hence also beacons) must
877 * be ignored here, because we need to trigger the timer during
878 * data idle periods for sending the periodic probe request to the
879 * AP we're connected to.
881 if (is_multicast_ether_addr(hdr->addr1))
884 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
887 mod_timer(&sdata->u.mgd.conn_mon_timer,
888 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
891 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
893 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
896 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
897 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
898 ssid + 2, ssid[1], NULL, 0);
900 ifmgd->probe_send_count++;
901 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
902 run_again(ifmgd, ifmgd->probe_timeout);
905 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
908 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
909 bool already = false;
911 if (!ieee80211_sdata_running(sdata))
914 if (sdata->local->scanning)
917 if (sdata->local->tmp_channel)
920 mutex_lock(&ifmgd->mtx);
922 if (!ifmgd->associated)
925 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
926 if (beacon && net_ratelimit())
927 printk(KERN_DEBUG "%s: detected beacon loss from AP "
928 "- sending probe request\n", sdata->name);
932 * The driver/our work has already reported this event or the
933 * connection monitoring has kicked in and we have already sent
934 * a probe request. Or maybe the AP died and the driver keeps
935 * reporting until we disassociate...
937 * In either case we have to ignore the current call to this
938 * function (except for setting the correct probe reason bit)
939 * because otherwise we would reset the timer every time and
940 * never check whether we received a probe response!
942 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
943 IEEE80211_STA_CONNECTION_POLL))
947 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
949 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
954 mutex_lock(&sdata->local->iflist_mtx);
955 ieee80211_recalc_ps(sdata->local, -1);
956 mutex_unlock(&sdata->local->iflist_mtx);
958 ifmgd->probe_send_count = 0;
959 ieee80211_mgd_probe_ap_send(sdata);
961 mutex_unlock(&ifmgd->mtx);
964 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
967 struct ieee80211_local *local = sdata->local;
970 mutex_lock(&ifmgd->mtx);
971 if (!ifmgd->associated) {
972 mutex_unlock(&ifmgd->mtx);
976 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
978 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
980 ieee80211_set_disassoc(sdata, true);
981 ieee80211_recalc_idle(local);
982 mutex_unlock(&ifmgd->mtx);
984 * must be outside lock due to cfg80211,
985 * but that's not a problem.
987 ieee80211_send_deauth_disassoc(sdata, bssid,
988 IEEE80211_STYPE_DEAUTH,
989 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
993 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
995 struct ieee80211_sub_if_data *sdata =
996 container_of(work, struct ieee80211_sub_if_data,
997 u.mgd.beacon_connection_loss_work);
999 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1000 __ieee80211_connection_loss(sdata);
1002 ieee80211_mgd_probe_ap(sdata, true);
1005 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1007 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1008 struct ieee80211_hw *hw = &sdata->local->hw;
1010 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1011 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1013 EXPORT_SYMBOL(ieee80211_beacon_loss);
1015 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1017 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1018 struct ieee80211_hw *hw = &sdata->local->hw;
1020 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1021 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1023 EXPORT_SYMBOL(ieee80211_connection_loss);
1026 static enum rx_mgmt_action __must_check
1027 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1028 struct ieee80211_mgmt *mgmt, size_t len)
1030 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1031 const u8 *bssid = NULL;
1035 return RX_MGMT_NONE;
1037 ASSERT_MGD_MTX(ifmgd);
1039 bssid = ifmgd->associated->bssid;
1041 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1043 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1044 sdata->name, bssid, reason_code);
1046 ieee80211_set_disassoc(sdata, true);
1047 ieee80211_recalc_idle(sdata->local);
1049 return RX_MGMT_CFG80211_DEAUTH;
1053 static enum rx_mgmt_action __must_check
1054 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1055 struct ieee80211_mgmt *mgmt, size_t len)
1057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1061 return RX_MGMT_NONE;
1063 ASSERT_MGD_MTX(ifmgd);
1065 if (WARN_ON(!ifmgd->associated))
1066 return RX_MGMT_NONE;
1068 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1069 return RX_MGMT_NONE;
1071 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1073 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1074 sdata->name, mgmt->sa, reason_code);
1076 ieee80211_set_disassoc(sdata, true);
1077 ieee80211_recalc_idle(sdata->local);
1078 return RX_MGMT_CFG80211_DISASSOC;
1082 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1083 struct ieee80211_mgmt *mgmt, size_t len)
1085 struct ieee80211_sub_if_data *sdata = wk->sdata;
1086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1087 struct ieee80211_local *local = sdata->local;
1088 struct ieee80211_supported_band *sband;
1089 struct sta_info *sta;
1090 struct cfg80211_bss *cbss = wk->assoc.bss;
1092 u32 rates, basic_rates;
1093 u16 capab_info, aid;
1094 struct ieee802_11_elems elems;
1095 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1098 bool have_higher_than_11mbit = false;
1099 u16 ap_ht_cap_flags;
1101 /* AssocResp and ReassocResp have identical structure */
1103 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1104 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1106 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1107 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1108 "set\n", sdata->name, aid);
1109 aid &= ~(BIT(15) | BIT(14));
1111 pos = mgmt->u.assoc_resp.variable;
1112 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1114 if (!elems.supp_rates) {
1115 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1122 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
1124 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1125 " the AP\n", sdata->name);
1129 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1131 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1132 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1136 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1138 for (i = 0; i < elems.supp_rates_len; i++) {
1139 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1140 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1143 have_higher_than_11mbit = true;
1145 for (j = 0; j < sband->n_bitrates; j++) {
1146 if (sband->bitrates[j].bitrate == rate) {
1149 basic_rates |= BIT(j);
1155 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1156 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1157 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1160 have_higher_than_11mbit = true;
1162 for (j = 0; j < sband->n_bitrates; j++) {
1163 if (sband->bitrates[j].bitrate == rate) {
1166 basic_rates |= BIT(j);
1172 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1173 sdata->vif.bss_conf.basic_rates = basic_rates;
1175 /* cf. IEEE 802.11 9.2.12 */
1176 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1177 have_higher_than_11mbit)
1178 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1180 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1182 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1183 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1184 elems.ht_cap_elem, &sta->sta.ht_cap);
1186 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1188 rate_control_rate_init(sta);
1190 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1191 set_sta_flags(sta, WLAN_STA_MFP);
1193 if (elems.wmm_param)
1194 set_sta_flags(sta, WLAN_STA_WME);
1196 err = sta_info_insert(sta);
1199 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1200 " the AP (error %d)\n", sdata->name, err);
1204 if (elems.wmm_param)
1205 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1206 elems.wmm_param_len);
1208 ieee80211_set_wmm_default(sdata);
1210 local->oper_channel = wk->chan;
1212 if (elems.ht_info_elem && elems.wmm_param &&
1213 (sdata->local->hw.queues >= 4) &&
1214 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1215 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1216 cbss->bssid, ap_ht_cap_flags);
1218 /* set AID and assoc capability,
1219 * ieee80211_set_associated() will tell the driver */
1220 bss_conf->aid = aid;
1221 bss_conf->assoc_capability = capab_info;
1222 ieee80211_set_associated(sdata, cbss, changed);
1225 * If we're using 4-addr mode, let the AP know that we're
1226 * doing so, so that it can create the STA VLAN on its side
1228 if (ifmgd->use_4addr)
1229 ieee80211_send_4addr_nullfunc(local, sdata);
1232 * Start timer to probe the connection to the AP now.
1233 * Also start the timer that will detect beacon loss.
1235 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1236 mod_beacon_timer(sdata);
1242 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1243 struct ieee80211_mgmt *mgmt,
1245 struct ieee80211_rx_status *rx_status,
1246 struct ieee802_11_elems *elems,
1249 struct ieee80211_local *local = sdata->local;
1251 struct ieee80211_bss *bss;
1252 struct ieee80211_channel *channel;
1253 bool need_ps = false;
1255 if (sdata->u.mgd.associated) {
1256 bss = (void *)sdata->u.mgd.associated->priv;
1257 /* not previously set so we may need to recalc */
1258 need_ps = !bss->dtim_period;
1261 if (elems->ds_params && elems->ds_params_len == 1)
1262 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1264 freq = rx_status->freq;
1266 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1268 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1271 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1274 ieee80211_rx_bss_put(local, bss);
1276 if (!sdata->u.mgd.associated)
1280 mutex_lock(&local->iflist_mtx);
1281 ieee80211_recalc_ps(local, -1);
1282 mutex_unlock(&local->iflist_mtx);
1285 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1286 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1288 struct ieee80211_channel_sw_ie *sw_elem =
1289 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1290 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1295 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1296 struct sk_buff *skb)
1298 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1299 struct ieee80211_if_managed *ifmgd;
1300 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1301 size_t baselen, len = skb->len;
1302 struct ieee802_11_elems elems;
1304 ifmgd = &sdata->u.mgd;
1306 ASSERT_MGD_MTX(ifmgd);
1308 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1309 return; /* ignore ProbeResp to foreign address */
1311 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1315 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1318 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1320 if (ifmgd->associated &&
1321 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
1322 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1323 IEEE80211_STA_CONNECTION_POLL)) {
1324 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1325 IEEE80211_STA_BEACON_POLL);
1326 mutex_lock(&sdata->local->iflist_mtx);
1327 ieee80211_recalc_ps(sdata->local, -1);
1328 mutex_unlock(&sdata->local->iflist_mtx);
1330 * We've received a probe response, but are not sure whether
1331 * we have or will be receiving any beacons or data, so let's
1332 * schedule the timers again, just in case.
1334 mod_beacon_timer(sdata);
1335 mod_timer(&ifmgd->conn_mon_timer,
1336 round_jiffies_up(jiffies +
1337 IEEE80211_CONNECTION_IDLE_TIME));
1342 * This is the canonical list of information elements we care about,
1343 * the filter code also gives us all changes to the Microsoft OUI
1344 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1346 * We implement beacon filtering in software since that means we can
1347 * avoid processing the frame here and in cfg80211, and userspace
1348 * will not be able to tell whether the hardware supports it or not.
1350 * XXX: This list needs to be dynamic -- userspace needs to be able to
1351 * add items it requires. It also needs to be able to tell us to
1352 * look out for other vendor IEs.
1354 static const u64 care_about_ies =
1355 (1ULL << WLAN_EID_COUNTRY) |
1356 (1ULL << WLAN_EID_ERP_INFO) |
1357 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1358 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1359 (1ULL << WLAN_EID_HT_CAPABILITY) |
1360 (1ULL << WLAN_EID_HT_INFORMATION);
1362 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1363 struct ieee80211_mgmt *mgmt,
1365 struct ieee80211_rx_status *rx_status)
1367 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1368 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1370 struct ieee802_11_elems elems;
1371 struct ieee80211_local *local = sdata->local;
1373 bool erp_valid, directed_tim = false;
1378 ASSERT_MGD_MTX(ifmgd);
1380 /* Process beacon from the current BSS */
1381 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1385 if (rx_status->freq != local->hw.conf.channel->center_freq)
1389 * We might have received a number of frames, among them a
1390 * disassoc frame and a beacon...
1392 if (!ifmgd->associated)
1395 bssid = ifmgd->associated->bssid;
1398 * And in theory even frames from a different AP we were just
1399 * associated to a split-second ago!
1401 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1404 /* Track average RSSI from the Beacon frames of the current AP */
1405 ifmgd->last_beacon_signal = rx_status->signal;
1406 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1407 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1408 ifmgd->ave_beacon_signal = rx_status->signal;
1409 ifmgd->last_cqm_event_signal = 0;
1411 ifmgd->ave_beacon_signal =
1412 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1413 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1414 ifmgd->ave_beacon_signal) / 16;
1416 if (bss_conf->cqm_rssi_thold &&
1417 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1418 int sig = ifmgd->ave_beacon_signal / 16;
1419 int last_event = ifmgd->last_cqm_event_signal;
1420 int thold = bss_conf->cqm_rssi_thold;
1421 int hyst = bss_conf->cqm_rssi_hyst;
1423 (last_event == 0 || sig < last_event - hyst)) {
1424 ifmgd->last_cqm_event_signal = sig;
1425 ieee80211_cqm_rssi_notify(
1427 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1429 } else if (sig > thold &&
1430 (last_event == 0 || sig > last_event + hyst)) {
1431 ifmgd->last_cqm_event_signal = sig;
1432 ieee80211_cqm_rssi_notify(
1434 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1439 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1440 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1441 if (net_ratelimit()) {
1442 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1443 "to a received beacon\n", sdata->name);
1446 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1447 mutex_lock(&local->iflist_mtx);
1448 ieee80211_recalc_ps(local, -1);
1449 mutex_unlock(&local->iflist_mtx);
1453 * Push the beacon loss detection into the future since
1454 * we are processing a beacon from the AP just now.
1456 mod_beacon_timer(sdata);
1458 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1459 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1460 len - baselen, &elems,
1461 care_about_ies, ncrc);
1463 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1464 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1467 if (ncrc != ifmgd->beacon_crc) {
1468 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1471 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1472 elems.wmm_param_len);
1475 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1477 if (local->hw.conf.dynamic_ps_timeout > 0) {
1478 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1479 ieee80211_hw_config(local,
1480 IEEE80211_CONF_CHANGE_PS);
1481 ieee80211_send_nullfunc(local, sdata, 0);
1483 local->pspolling = true;
1486 * Here is assumed that the driver will be
1487 * able to send ps-poll frame and receive a
1488 * response even though power save mode is
1489 * enabled, but some drivers might require
1490 * to disable power save here. This needs
1491 * to be investigated.
1493 ieee80211_send_pspoll(local, sdata);
1498 if (ncrc == ifmgd->beacon_crc)
1500 ifmgd->beacon_crc = ncrc;
1502 if (elems.erp_info && elems.erp_info_len >= 1) {
1504 erp_value = elems.erp_info[0];
1508 changed |= ieee80211_handle_bss_capability(sdata,
1509 le16_to_cpu(mgmt->u.beacon.capab_info),
1510 erp_valid, erp_value);
1513 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1514 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1515 struct sta_info *sta;
1516 struct ieee80211_supported_band *sband;
1517 u16 ap_ht_cap_flags;
1521 sta = sta_info_get(sdata, bssid);
1522 if (WARN_ON(!sta)) {
1527 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1529 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1530 elems.ht_cap_elem, &sta->sta.ht_cap);
1532 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1536 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1537 bssid, ap_ht_cap_flags);
1540 /* Note: country IE parsing is done for us by cfg80211 */
1541 if (elems.country_elem) {
1542 /* TODO: IBSS also needs this */
1543 if (elems.pwr_constr_elem)
1544 ieee80211_handle_pwr_constr(sdata,
1545 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1546 elems.pwr_constr_elem,
1547 elems.pwr_constr_elem_len);
1550 ieee80211_bss_info_change_notify(sdata, changed);
1553 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1554 struct sk_buff *skb)
1556 struct ieee80211_local *local = sdata->local;
1557 struct ieee80211_mgmt *mgmt;
1561 return RX_DROP_MONITOR;
1563 mgmt = (struct ieee80211_mgmt *) skb->data;
1564 fc = le16_to_cpu(mgmt->frame_control);
1566 switch (fc & IEEE80211_FCTL_STYPE) {
1567 case IEEE80211_STYPE_PROBE_RESP:
1568 case IEEE80211_STYPE_BEACON:
1569 case IEEE80211_STYPE_DEAUTH:
1570 case IEEE80211_STYPE_DISASSOC:
1571 case IEEE80211_STYPE_ACTION:
1572 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1573 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1577 return RX_DROP_MONITOR;
1580 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1581 struct sk_buff *skb)
1583 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1584 struct ieee80211_rx_status *rx_status;
1585 struct ieee80211_mgmt *mgmt;
1586 enum rx_mgmt_action rma = RX_MGMT_NONE;
1589 rx_status = (struct ieee80211_rx_status *) skb->cb;
1590 mgmt = (struct ieee80211_mgmt *) skb->data;
1591 fc = le16_to_cpu(mgmt->frame_control);
1593 mutex_lock(&ifmgd->mtx);
1595 if (ifmgd->associated &&
1596 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1597 switch (fc & IEEE80211_FCTL_STYPE) {
1598 case IEEE80211_STYPE_BEACON:
1599 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1602 case IEEE80211_STYPE_PROBE_RESP:
1603 ieee80211_rx_mgmt_probe_resp(sdata, skb);
1605 case IEEE80211_STYPE_DEAUTH:
1606 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1608 case IEEE80211_STYPE_DISASSOC:
1609 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1611 case IEEE80211_STYPE_ACTION:
1612 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1615 ieee80211_sta_process_chanswitch(sdata,
1616 &mgmt->u.action.u.chan_switch.sw_elem,
1617 (void *)ifmgd->associated->priv);
1620 mutex_unlock(&ifmgd->mtx);
1626 case RX_MGMT_CFG80211_DEAUTH:
1627 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1629 case RX_MGMT_CFG80211_DISASSOC:
1630 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1633 WARN(1, "unexpected: %d", rma);
1638 mutex_unlock(&ifmgd->mtx);
1640 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
1641 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
1642 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1648 static void ieee80211_sta_timer(unsigned long data)
1650 struct ieee80211_sub_if_data *sdata =
1651 (struct ieee80211_sub_if_data *) data;
1652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1653 struct ieee80211_local *local = sdata->local;
1655 if (local->quiescing) {
1656 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1660 ieee80211_queue_work(&local->hw, &ifmgd->work);
1663 static void ieee80211_sta_work(struct work_struct *work)
1665 struct ieee80211_sub_if_data *sdata =
1666 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1667 struct ieee80211_local *local = sdata->local;
1668 struct ieee80211_if_managed *ifmgd;
1669 struct sk_buff *skb;
1671 if (!ieee80211_sdata_running(sdata))
1674 if (local->scanning)
1677 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1681 * ieee80211_queue_work() should have picked up most cases,
1682 * here we'll pick the the rest.
1684 if (WARN(local->suspended, "STA MLME work scheduled while "
1685 "going to suspend\n"))
1688 ifmgd = &sdata->u.mgd;
1690 /* first process frames to avoid timing out while a frame is pending */
1691 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1692 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1694 /* then process the rest of the work */
1695 mutex_lock(&ifmgd->mtx);
1697 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1698 IEEE80211_STA_CONNECTION_POLL) &&
1699 ifmgd->associated) {
1702 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1703 if (time_is_after_jiffies(ifmgd->probe_timeout))
1704 run_again(ifmgd, ifmgd->probe_timeout);
1706 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1707 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1708 printk(KERN_DEBUG "No probe response from AP %pM"
1709 " after %dms, try %d\n", bssid,
1710 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1711 ifmgd->probe_send_count);
1713 ieee80211_mgd_probe_ap_send(sdata);
1716 * We actually lost the connection ... or did we?
1719 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1720 IEEE80211_STA_BEACON_POLL);
1721 printk(KERN_DEBUG "No probe response from AP %pM"
1722 " after %dms, disconnecting.\n",
1723 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
1724 ieee80211_set_disassoc(sdata, true);
1725 ieee80211_recalc_idle(local);
1726 mutex_unlock(&ifmgd->mtx);
1728 * must be outside lock due to cfg80211,
1729 * but that's not a problem.
1731 ieee80211_send_deauth_disassoc(sdata, bssid,
1732 IEEE80211_STYPE_DEAUTH,
1733 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1735 mutex_lock(&ifmgd->mtx);
1739 mutex_unlock(&ifmgd->mtx);
1742 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1744 struct ieee80211_sub_if_data *sdata =
1745 (struct ieee80211_sub_if_data *) data;
1746 struct ieee80211_local *local = sdata->local;
1748 if (local->quiescing)
1751 ieee80211_queue_work(&sdata->local->hw,
1752 &sdata->u.mgd.beacon_connection_loss_work);
1755 static void ieee80211_sta_conn_mon_timer(unsigned long data)
1757 struct ieee80211_sub_if_data *sdata =
1758 (struct ieee80211_sub_if_data *) data;
1759 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1760 struct ieee80211_local *local = sdata->local;
1762 if (local->quiescing)
1765 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
1768 static void ieee80211_sta_monitor_work(struct work_struct *work)
1770 struct ieee80211_sub_if_data *sdata =
1771 container_of(work, struct ieee80211_sub_if_data,
1772 u.mgd.monitor_work);
1774 ieee80211_mgd_probe_ap(sdata, false);
1777 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1779 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1780 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1781 IEEE80211_STA_CONNECTION_POLL);
1783 /* let's probe the connection once */
1784 ieee80211_queue_work(&sdata->local->hw,
1785 &sdata->u.mgd.monitor_work);
1786 /* and do all the other regular work too */
1787 ieee80211_queue_work(&sdata->local->hw,
1788 &sdata->u.mgd.work);
1793 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1798 * we need to use atomic bitops for the running bits
1799 * only because both timers might fire at the same
1800 * time -- the code here is properly synchronised.
1803 cancel_work_sync(&ifmgd->work);
1804 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
1805 if (del_timer_sync(&ifmgd->timer))
1806 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1808 cancel_work_sync(&ifmgd->chswitch_work);
1809 if (del_timer_sync(&ifmgd->chswitch_timer))
1810 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1812 cancel_work_sync(&ifmgd->monitor_work);
1813 /* these will just be re-established on connection */
1814 del_timer_sync(&ifmgd->conn_mon_timer);
1815 del_timer_sync(&ifmgd->bcn_mon_timer);
1818 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1822 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1823 add_timer(&ifmgd->timer);
1824 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1825 add_timer(&ifmgd->chswitch_timer);
1829 /* interface setup */
1830 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1832 struct ieee80211_if_managed *ifmgd;
1834 ifmgd = &sdata->u.mgd;
1835 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1836 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
1837 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1838 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1839 ieee80211_beacon_connection_loss_work);
1840 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1841 (unsigned long) sdata);
1842 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1843 (unsigned long) sdata);
1844 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1845 (unsigned long) sdata);
1846 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1847 (unsigned long) sdata);
1848 skb_queue_head_init(&ifmgd->skb_queue);
1852 mutex_init(&ifmgd->mtx);
1854 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1855 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1857 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1860 /* scan finished notification */
1861 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1863 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1865 /* Restart STA timers */
1867 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1868 ieee80211_restart_sta_timer(sdata);
1872 int ieee80211_max_network_latency(struct notifier_block *nb,
1873 unsigned long data, void *dummy)
1875 s32 latency_usec = (s32) data;
1876 struct ieee80211_local *local =
1877 container_of(nb, struct ieee80211_local,
1878 network_latency_notifier);
1880 mutex_lock(&local->iflist_mtx);
1881 ieee80211_recalc_ps(local, latency_usec);
1882 mutex_unlock(&local->iflist_mtx);
1888 static enum work_done_result
1889 ieee80211_probe_auth_done(struct ieee80211_work *wk,
1890 struct sk_buff *skb)
1893 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1894 return WORK_DONE_DESTROY;
1897 if (wk->type == IEEE80211_WORK_AUTH) {
1898 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1899 return WORK_DONE_DESTROY;
1902 mutex_lock(&wk->sdata->u.mgd.mtx);
1903 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1904 mutex_unlock(&wk->sdata->u.mgd.mtx);
1906 wk->type = IEEE80211_WORK_AUTH;
1907 wk->probe_auth.tries = 0;
1908 return WORK_DONE_REQUEUE;
1911 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1912 struct cfg80211_auth_request *req)
1915 struct ieee80211_work *wk;
1918 if (req->local_state_change)
1919 return 0; /* no need to update mac80211 state */
1921 switch (req->auth_type) {
1922 case NL80211_AUTHTYPE_OPEN_SYSTEM:
1923 auth_alg = WLAN_AUTH_OPEN;
1925 case NL80211_AUTHTYPE_SHARED_KEY:
1926 auth_alg = WLAN_AUTH_SHARED_KEY;
1928 case NL80211_AUTHTYPE_FT:
1929 auth_alg = WLAN_AUTH_FT;
1931 case NL80211_AUTHTYPE_NETWORK_EAP:
1932 auth_alg = WLAN_AUTH_LEAP;
1938 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1942 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
1944 if (req->ie && req->ie_len) {
1945 memcpy(wk->ie, req->ie, req->ie_len);
1946 wk->ie_len = req->ie_len;
1949 if (req->key && req->key_len) {
1950 wk->probe_auth.key_len = req->key_len;
1951 wk->probe_auth.key_idx = req->key_idx;
1952 memcpy(wk->probe_auth.key, req->key, req->key_len);
1955 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
1956 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
1957 wk->probe_auth.ssid_len = ssid[1];
1959 wk->probe_auth.algorithm = auth_alg;
1960 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
1962 /* if we already have a probe, don't probe again */
1963 if (req->bss->proberesp_ies)
1964 wk->type = IEEE80211_WORK_AUTH;
1966 wk->type = IEEE80211_WORK_DIRECT_PROBE;
1967 wk->chan = req->bss->channel;
1969 wk->done = ieee80211_probe_auth_done;
1971 ieee80211_add_work(wk);
1975 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
1976 struct sk_buff *skb)
1978 struct ieee80211_mgmt *mgmt;
1982 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
1983 return WORK_DONE_DESTROY;
1986 mgmt = (void *)skb->data;
1987 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1989 if (status == WLAN_STATUS_SUCCESS) {
1990 mutex_lock(&wk->sdata->u.mgd.mtx);
1991 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
1992 mutex_unlock(&wk->sdata->u.mgd.mtx);
1993 /* oops -- internal error -- send timeout for now */
1994 cfg80211_send_assoc_timeout(wk->sdata->dev,
1996 return WORK_DONE_DESTROY;
1998 mutex_unlock(&wk->sdata->u.mgd.mtx);
2001 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2002 return WORK_DONE_DESTROY;
2005 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2006 struct cfg80211_assoc_request *req)
2008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2009 struct ieee80211_bss *bss = (void *)req->bss->priv;
2010 struct ieee80211_work *wk;
2014 mutex_lock(&ifmgd->mtx);
2015 if (ifmgd->associated) {
2016 if (!req->prev_bssid ||
2017 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2020 * We are already associated and the request was not a
2021 * reassociation request from the current BSS, so
2024 mutex_unlock(&ifmgd->mtx);
2028 /* Trying to reassociate - clear previous association state */
2029 ieee80211_set_disassoc(sdata, true);
2031 mutex_unlock(&ifmgd->mtx);
2033 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2037 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2038 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2040 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2041 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2042 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2043 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2044 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2047 if (req->ie && req->ie_len) {
2048 memcpy(wk->ie, req->ie, req->ie_len);
2049 wk->ie_len = req->ie_len;
2053 wk->assoc.bss = req->bss;
2055 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2057 /* new association always uses requested smps mode */
2058 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2059 if (ifmgd->powersave)
2060 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2062 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2064 ifmgd->ap_smps = ifmgd->req_smps;
2066 wk->assoc.smps = ifmgd->ap_smps;
2068 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2069 * We still associate in non-HT mode (11a/b/g) if any one of these
2070 * ciphers is configured as pairwise.
2071 * We can set this to true for non-11n hardware, that'll be checked
2072 * separately along with the peer capabilities.
2074 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2075 wk->assoc.capability = req->bss->capability;
2076 wk->assoc.wmm_used = bss->wmm_used;
2077 wk->assoc.supp_rates = bss->supp_rates;
2078 wk->assoc.supp_rates_len = bss->supp_rates_len;
2079 wk->assoc.ht_information_ie =
2080 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2082 if (bss->wmm_used && bss->uapsd_supported &&
2083 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2084 wk->assoc.uapsd_used = true;
2085 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2087 wk->assoc.uapsd_used = false;
2088 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2091 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2092 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2093 wk->assoc.ssid_len = ssid[1];
2095 if (req->prev_bssid)
2096 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2098 wk->type = IEEE80211_WORK_ASSOC;
2099 wk->chan = req->bss->channel;
2101 wk->done = ieee80211_assoc_done;
2104 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2105 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2107 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2108 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2111 if (req->crypto.control_port)
2112 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2114 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2116 ieee80211_add_work(wk);
2120 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2121 struct cfg80211_deauth_request *req,
2124 struct ieee80211_local *local = sdata->local;
2125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2126 struct ieee80211_work *wk;
2127 const u8 *bssid = req->bss->bssid;
2129 mutex_lock(&ifmgd->mtx);
2131 if (ifmgd->associated == req->bss) {
2132 bssid = req->bss->bssid;
2133 ieee80211_set_disassoc(sdata, true);
2134 mutex_unlock(&ifmgd->mtx);
2136 bool not_auth_yet = false;
2138 mutex_unlock(&ifmgd->mtx);
2140 mutex_lock(&local->work_mtx);
2141 list_for_each_entry(wk, &local->work_list, list) {
2142 if (wk->sdata != sdata)
2145 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2146 wk->type != IEEE80211_WORK_AUTH)
2149 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2152 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2153 list_del_rcu(&wk->list);
2157 mutex_unlock(&local->work_mtx);
2160 * If somebody requests authentication and we haven't
2161 * sent out an auth frame yet there's no need to send
2162 * out a deauth frame either. If the state was PROBE,
2163 * then this is the case. If it's AUTH we have sent a
2164 * frame, and if it's IDLE we have completed the auth
2168 __cfg80211_auth_canceled(sdata->dev, bssid);
2173 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2174 sdata->name, bssid, req->reason_code);
2176 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2177 req->reason_code, cookie,
2178 !req->local_state_change);
2180 ieee80211_recalc_idle(sdata->local);
2185 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2186 struct cfg80211_disassoc_request *req,
2189 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2192 mutex_lock(&ifmgd->mtx);
2195 * cfg80211 should catch this ... but it's racy since
2196 * we can receive a disassoc frame, process it, hand it
2197 * to cfg80211 while that's in a locked section already
2198 * trying to tell us that the user wants to disconnect.
2200 if (ifmgd->associated != req->bss) {
2201 mutex_unlock(&ifmgd->mtx);
2205 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2206 sdata->name, req->bss->bssid, req->reason_code);
2208 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2209 ieee80211_set_disassoc(sdata, false);
2211 mutex_unlock(&ifmgd->mtx);
2213 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2214 IEEE80211_STYPE_DISASSOC, req->reason_code,
2215 cookie, !req->local_state_change);
2216 sta_info_destroy_addr(sdata, bssid);
2218 ieee80211_recalc_idle(sdata->local);
2223 int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
2224 struct ieee80211_channel *chan,
2225 enum nl80211_channel_type channel_type,
2226 const u8 *buf, size_t len, u64 *cookie)
2228 struct ieee80211_local *local = sdata->local;
2229 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2230 struct sk_buff *skb;
2232 /* Check that we are on the requested channel for transmission */
2233 if ((chan != local->tmp_channel ||
2234 channel_type != local->tmp_channel_type) &&
2235 (chan != local->oper_channel ||
2236 channel_type != local->oper_channel_type))
2239 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2242 skb_reserve(skb, local->hw.extra_tx_headroom);
2244 memcpy(skb_put(skb, len), buf, len);
2246 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
2247 IEEE80211_SKB_CB(skb)->flags |=
2248 IEEE80211_TX_INTFL_DONT_ENCRYPT;
2249 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2250 IEEE80211_TX_CTL_REQ_TX_STATUS;
2251 skb->dev = sdata->dev;
2252 ieee80211_tx_skb(sdata, skb);
2254 *cookie = (unsigned long) skb;
2258 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2259 enum nl80211_cqm_rssi_threshold_event rssi_event,
2262 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2264 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2266 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);