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;
483 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
484 local->ps_sdata = NULL;
488 if (!list_empty(&local->work_list)) {
489 local->ps_sdata = NULL;
493 list_for_each_entry(sdata, &local->interfaces, list) {
494 if (!ieee80211_sdata_running(sdata))
496 if (sdata->vif.type != NL80211_IFTYPE_STATION)
502 if (count == 1 && found->u.mgd.powersave &&
503 found->u.mgd.associated &&
504 found->u.mgd.associated->beacon_ies &&
505 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
506 IEEE80211_STA_CONNECTION_POLL))) {
510 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
512 beaconint_us = ieee80211_tu_to_usec(
513 found->vif.bss_conf.beacon_int);
515 timeout = local->hw.conf.dynamic_ps_forced_timeout;
518 * The 2 second value is there for compatibility until
519 * the PM_QOS_NETWORK_LATENCY is configured with real
522 if (latency == 2000000000)
524 else if (latency <= 50000)
526 else if (latency <= 100000)
528 else if (latency <= 500000)
533 local->hw.conf.dynamic_ps_timeout = timeout;
535 if (beaconint_us > latency) {
536 local->ps_sdata = NULL;
538 struct ieee80211_bss *bss;
542 bss = (void *)found->u.mgd.associated->priv;
543 dtimper = bss->dtim_period;
545 /* If the TIM IE is invalid, pretend the value is 1 */
548 else if (dtimper > 1)
549 maxslp = min_t(int, dtimper,
550 latency / beaconint_us);
552 local->hw.conf.max_sleep_period = maxslp;
553 local->hw.conf.ps_dtim_period = dtimper;
554 local->ps_sdata = found;
557 local->ps_sdata = NULL;
561 ieee80211_change_ps(local);
564 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
566 struct ieee80211_local *local =
567 container_of(work, struct ieee80211_local,
568 dynamic_ps_disable_work);
570 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
571 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
572 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
575 ieee80211_wake_queues_by_reason(&local->hw,
576 IEEE80211_QUEUE_STOP_REASON_PS);
579 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
581 struct ieee80211_local *local =
582 container_of(work, struct ieee80211_local,
583 dynamic_ps_enable_work);
584 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
585 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
587 /* can only happen when PS was just disabled anyway */
591 if (local->hw.conf.flags & IEEE80211_CONF_PS)
594 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
595 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
596 ieee80211_send_nullfunc(local, sdata, 1);
598 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
599 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
600 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
601 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
602 local->hw.conf.flags |= IEEE80211_CONF_PS;
603 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
607 void ieee80211_dynamic_ps_timer(unsigned long data)
609 struct ieee80211_local *local = (void *) data;
611 if (local->quiescing || local->suspended)
614 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
618 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
619 struct ieee80211_if_managed *ifmgd,
620 u8 *wmm_param, size_t wmm_param_len)
622 struct ieee80211_tx_queue_params params;
625 u8 *pos, uapsd_queues = 0;
627 if (!local->ops->conf_tx)
630 if (local->hw.queues < 4)
636 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
639 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
640 uapsd_queues = local->uapsd_queues;
642 count = wmm_param[6] & 0x0f;
643 if (count == ifmgd->wmm_last_param_set)
645 ifmgd->wmm_last_param_set = count;
648 left = wmm_param_len - 8;
650 memset(¶ms, 0, sizeof(params));
653 for (; left >= 4; left -= 4, pos += 4) {
654 int aci = (pos[0] >> 5) & 0x03;
655 int acm = (pos[0] >> 4) & 0x01;
663 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
664 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
670 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
671 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
677 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
678 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
685 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
686 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
691 params.aifs = pos[0] & 0x0f;
692 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
693 params.cw_min = ecw2cw(pos[1] & 0x0f);
694 params.txop = get_unaligned_le16(pos + 2);
695 params.uapsd = uapsd;
697 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
698 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
699 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
700 wiphy_name(local->hw.wiphy), queue, aci, acm,
701 params.aifs, params.cw_min, params.cw_max, params.txop,
704 if (drv_conf_tx(local, queue, ¶ms))
705 printk(KERN_DEBUG "%s: failed to set TX queue "
706 "parameters for queue %d\n",
707 wiphy_name(local->hw.wiphy), queue);
710 /* enable WMM or activate new settings */
711 local->hw.conf.flags |= IEEE80211_CONF_QOS;
712 drv_config(local, IEEE80211_CONF_CHANGE_QOS);
715 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
716 u16 capab, bool erp_valid, u8 erp)
718 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
721 bool use_short_preamble;
725 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
726 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
728 use_protection = false;
729 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
732 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
733 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
734 use_short_slot = true;
736 if (use_protection != bss_conf->use_cts_prot) {
737 bss_conf->use_cts_prot = use_protection;
738 changed |= BSS_CHANGED_ERP_CTS_PROT;
741 if (use_short_preamble != bss_conf->use_short_preamble) {
742 bss_conf->use_short_preamble = use_short_preamble;
743 changed |= BSS_CHANGED_ERP_PREAMBLE;
746 if (use_short_slot != bss_conf->use_short_slot) {
747 bss_conf->use_short_slot = use_short_slot;
748 changed |= BSS_CHANGED_ERP_SLOT;
754 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
755 struct cfg80211_bss *cbss,
756 u32 bss_info_changed)
758 struct ieee80211_bss *bss = (void *)cbss->priv;
759 struct ieee80211_local *local = sdata->local;
761 bss_info_changed |= BSS_CHANGED_ASSOC;
762 /* set timing information */
763 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
764 sdata->vif.bss_conf.timestamp = cbss->tsf;
766 bss_info_changed |= BSS_CHANGED_BEACON_INT;
767 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
768 cbss->capability, bss->has_erp_value, bss->erp_value);
770 sdata->u.mgd.associated = cbss;
771 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
773 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
775 /* just to be sure */
776 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
777 IEEE80211_STA_BEACON_POLL);
780 * Always handle WMM once after association regardless
781 * of the first value the AP uses. Setting -1 here has
782 * that effect because the AP values is an unsigned
785 sdata->u.mgd.wmm_last_param_set = -1;
787 ieee80211_led_assoc(local, 1);
789 sdata->vif.bss_conf.assoc = 1;
791 * For now just always ask the driver to update the basic rateset
792 * when we have associated, we aren't checking whether it actually
795 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
797 /* And the BSSID changed - we're associated now */
798 bss_info_changed |= BSS_CHANGED_BSSID;
800 /* Tell the driver to monitor connection quality (if supported) */
801 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
802 sdata->vif.bss_conf.cqm_rssi_thold)
803 bss_info_changed |= BSS_CHANGED_CQM;
805 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
807 mutex_lock(&local->iflist_mtx);
808 ieee80211_recalc_ps(local, -1);
809 ieee80211_recalc_smps(local, sdata);
810 mutex_unlock(&local->iflist_mtx);
812 netif_tx_start_all_queues(sdata->dev);
813 netif_carrier_on(sdata->dev);
816 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
819 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
820 struct ieee80211_local *local = sdata->local;
821 struct sta_info *sta;
822 u32 changed = 0, config_changed = 0;
825 ASSERT_MGD_MTX(ifmgd);
827 if (WARN_ON(!ifmgd->associated))
830 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
832 ifmgd->associated = NULL;
833 memset(ifmgd->bssid, 0, ETH_ALEN);
836 * we need to commit the associated = NULL change because the
837 * scan code uses that to determine whether this iface should
838 * go to/wake up from powersave or not -- and could otherwise
839 * wake the queues erroneously.
844 * Thus, we can only afterwards stop the queues -- to account
845 * for the case where another CPU is finishing a scan at this
846 * time -- we don't want the scan code to enable queues.
849 netif_tx_stop_all_queues(sdata->dev);
850 netif_carrier_off(sdata->dev);
853 sta = sta_info_get(sdata, bssid);
855 set_sta_flags(sta, WLAN_STA_DISASSOC);
856 ieee80211_sta_tear_down_BA_sessions(sta);
860 changed |= ieee80211_reset_erp_info(sdata);
862 ieee80211_led_assoc(local, 0);
863 changed |= BSS_CHANGED_ASSOC;
864 sdata->vif.bss_conf.assoc = false;
866 ieee80211_set_wmm_default(sdata);
868 /* channel(_type) changes are handled by ieee80211_hw_config */
869 local->oper_channel_type = NL80211_CHAN_NO_HT;
871 /* on the next assoc, re-program HT parameters */
872 sdata->ht_opmode_valid = false;
874 local->power_constr_level = 0;
876 del_timer_sync(&local->dynamic_ps_timer);
877 cancel_work_sync(&local->dynamic_ps_enable_work);
879 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
880 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
881 config_changed |= IEEE80211_CONF_CHANGE_PS;
884 ieee80211_hw_config(local, config_changed);
886 /* And the BSSID changed -- not very interesting here */
887 changed |= BSS_CHANGED_BSSID;
888 ieee80211_bss_info_change_notify(sdata, changed);
891 sta_info_destroy_addr(sdata, bssid);
894 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
895 struct ieee80211_hdr *hdr)
898 * We can postpone the mgd.timer whenever receiving unicast frames
899 * from AP because we know that the connection is working both ways
900 * at that time. But multicast frames (and hence also beacons) must
901 * be ignored here, because we need to trigger the timer during
902 * data idle periods for sending the periodic probe request to the
903 * AP we're connected to.
905 if (is_multicast_ether_addr(hdr->addr1))
908 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
911 mod_timer(&sdata->u.mgd.conn_mon_timer,
912 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
915 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
917 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
920 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
921 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
922 ssid + 2, ssid[1], NULL, 0);
924 ifmgd->probe_send_count++;
925 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
926 run_again(ifmgd, ifmgd->probe_timeout);
929 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
933 bool already = false;
935 if (!ieee80211_sdata_running(sdata))
938 if (sdata->local->scanning)
941 if (sdata->local->tmp_channel)
944 mutex_lock(&ifmgd->mtx);
946 if (!ifmgd->associated)
949 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
950 if (beacon && net_ratelimit())
951 printk(KERN_DEBUG "%s: detected beacon loss from AP "
952 "- sending probe request\n", sdata->name);
956 * The driver/our work has already reported this event or the
957 * connection monitoring has kicked in and we have already sent
958 * a probe request. Or maybe the AP died and the driver keeps
959 * reporting until we disassociate...
961 * In either case we have to ignore the current call to this
962 * function (except for setting the correct probe reason bit)
963 * because otherwise we would reset the timer every time and
964 * never check whether we received a probe response!
966 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
967 IEEE80211_STA_CONNECTION_POLL))
971 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
973 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
978 mutex_lock(&sdata->local->iflist_mtx);
979 ieee80211_recalc_ps(sdata->local, -1);
980 mutex_unlock(&sdata->local->iflist_mtx);
982 ifmgd->probe_send_count = 0;
983 ieee80211_mgd_probe_ap_send(sdata);
985 mutex_unlock(&ifmgd->mtx);
988 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
991 struct ieee80211_local *local = sdata->local;
994 mutex_lock(&ifmgd->mtx);
995 if (!ifmgd->associated) {
996 mutex_unlock(&ifmgd->mtx);
1000 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1002 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1004 ieee80211_set_disassoc(sdata, true);
1005 ieee80211_recalc_idle(local);
1006 mutex_unlock(&ifmgd->mtx);
1008 * must be outside lock due to cfg80211,
1009 * but that's not a problem.
1011 ieee80211_send_deauth_disassoc(sdata, bssid,
1012 IEEE80211_STYPE_DEAUTH,
1013 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1017 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1019 struct ieee80211_sub_if_data *sdata =
1020 container_of(work, struct ieee80211_sub_if_data,
1021 u.mgd.beacon_connection_loss_work);
1023 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1024 __ieee80211_connection_loss(sdata);
1026 ieee80211_mgd_probe_ap(sdata, true);
1029 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1031 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1032 struct ieee80211_hw *hw = &sdata->local->hw;
1034 trace_api_beacon_loss(sdata);
1036 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1037 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1039 EXPORT_SYMBOL(ieee80211_beacon_loss);
1041 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1043 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1044 struct ieee80211_hw *hw = &sdata->local->hw;
1046 trace_api_connection_loss(sdata);
1048 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1049 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1051 EXPORT_SYMBOL(ieee80211_connection_loss);
1054 static enum rx_mgmt_action __must_check
1055 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1056 struct ieee80211_mgmt *mgmt, size_t len)
1058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1059 const u8 *bssid = NULL;
1063 return RX_MGMT_NONE;
1065 ASSERT_MGD_MTX(ifmgd);
1067 bssid = ifmgd->associated->bssid;
1069 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1071 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1072 sdata->name, bssid, reason_code);
1074 ieee80211_set_disassoc(sdata, true);
1075 ieee80211_recalc_idle(sdata->local);
1077 return RX_MGMT_CFG80211_DEAUTH;
1081 static enum rx_mgmt_action __must_check
1082 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1083 struct ieee80211_mgmt *mgmt, size_t len)
1085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1089 return RX_MGMT_NONE;
1091 ASSERT_MGD_MTX(ifmgd);
1093 if (WARN_ON(!ifmgd->associated))
1094 return RX_MGMT_NONE;
1096 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1097 return RX_MGMT_NONE;
1099 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1101 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1102 sdata->name, mgmt->sa, reason_code);
1104 ieee80211_set_disassoc(sdata, true);
1105 ieee80211_recalc_idle(sdata->local);
1106 return RX_MGMT_CFG80211_DISASSOC;
1110 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1111 struct ieee80211_mgmt *mgmt, size_t len)
1113 struct ieee80211_sub_if_data *sdata = wk->sdata;
1114 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1115 struct ieee80211_local *local = sdata->local;
1116 struct ieee80211_supported_band *sband;
1117 struct sta_info *sta;
1118 struct cfg80211_bss *cbss = wk->assoc.bss;
1120 u32 rates, basic_rates;
1121 u16 capab_info, aid;
1122 struct ieee802_11_elems elems;
1123 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1126 bool have_higher_than_11mbit = false;
1127 u16 ap_ht_cap_flags;
1129 /* AssocResp and ReassocResp have identical structure */
1131 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1132 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1134 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1135 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1136 "set\n", sdata->name, aid);
1137 aid &= ~(BIT(15) | BIT(14));
1139 pos = mgmt->u.assoc_resp.variable;
1140 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1142 if (!elems.supp_rates) {
1143 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1150 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
1152 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1153 " the AP\n", sdata->name);
1157 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1159 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1160 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1164 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1166 for (i = 0; i < elems.supp_rates_len; i++) {
1167 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1168 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1171 have_higher_than_11mbit = true;
1173 for (j = 0; j < sband->n_bitrates; j++) {
1174 if (sband->bitrates[j].bitrate == rate) {
1177 basic_rates |= BIT(j);
1183 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1184 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1185 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1188 have_higher_than_11mbit = true;
1190 for (j = 0; j < sband->n_bitrates; j++) {
1191 if (sband->bitrates[j].bitrate == rate) {
1194 basic_rates |= BIT(j);
1200 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1201 sdata->vif.bss_conf.basic_rates = basic_rates;
1203 /* cf. IEEE 802.11 9.2.12 */
1204 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1205 have_higher_than_11mbit)
1206 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1208 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1210 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1211 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1212 elems.ht_cap_elem, &sta->sta.ht_cap);
1214 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1216 rate_control_rate_init(sta);
1218 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1219 set_sta_flags(sta, WLAN_STA_MFP);
1221 if (elems.wmm_param)
1222 set_sta_flags(sta, WLAN_STA_WME);
1224 err = sta_info_insert(sta);
1227 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1228 " the AP (error %d)\n", sdata->name, err);
1232 if (elems.wmm_param)
1233 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1234 elems.wmm_param_len);
1236 ieee80211_set_wmm_default(sdata);
1238 local->oper_channel = wk->chan;
1240 if (elems.ht_info_elem && elems.wmm_param &&
1241 (sdata->local->hw.queues >= 4) &&
1242 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1243 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1244 cbss->bssid, ap_ht_cap_flags);
1246 /* set AID and assoc capability,
1247 * ieee80211_set_associated() will tell the driver */
1248 bss_conf->aid = aid;
1249 bss_conf->assoc_capability = capab_info;
1250 ieee80211_set_associated(sdata, cbss, changed);
1253 * If we're using 4-addr mode, let the AP know that we're
1254 * doing so, so that it can create the STA VLAN on its side
1256 if (ifmgd->use_4addr)
1257 ieee80211_send_4addr_nullfunc(local, sdata);
1260 * Start timer to probe the connection to the AP now.
1261 * Also start the timer that will detect beacon loss.
1263 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1264 mod_beacon_timer(sdata);
1270 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1271 struct ieee80211_mgmt *mgmt,
1273 struct ieee80211_rx_status *rx_status,
1274 struct ieee802_11_elems *elems,
1277 struct ieee80211_local *local = sdata->local;
1279 struct ieee80211_bss *bss;
1280 struct ieee80211_channel *channel;
1281 bool need_ps = false;
1283 if (sdata->u.mgd.associated) {
1284 bss = (void *)sdata->u.mgd.associated->priv;
1285 /* not previously set so we may need to recalc */
1286 need_ps = !bss->dtim_period;
1289 if (elems->ds_params && elems->ds_params_len == 1)
1290 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1292 freq = rx_status->freq;
1294 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1296 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1299 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1302 ieee80211_rx_bss_put(local, bss);
1304 if (!sdata->u.mgd.associated)
1308 mutex_lock(&local->iflist_mtx);
1309 ieee80211_recalc_ps(local, -1);
1310 mutex_unlock(&local->iflist_mtx);
1313 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1314 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1316 struct ieee80211_channel_sw_ie *sw_elem =
1317 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1318 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1323 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1324 struct sk_buff *skb)
1326 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1327 struct ieee80211_if_managed *ifmgd;
1328 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1329 size_t baselen, len = skb->len;
1330 struct ieee802_11_elems elems;
1332 ifmgd = &sdata->u.mgd;
1334 ASSERT_MGD_MTX(ifmgd);
1336 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1337 return; /* ignore ProbeResp to foreign address */
1339 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1343 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1346 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1348 if (ifmgd->associated &&
1349 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
1350 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1351 IEEE80211_STA_CONNECTION_POLL)) {
1352 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1353 IEEE80211_STA_BEACON_POLL);
1354 mutex_lock(&sdata->local->iflist_mtx);
1355 ieee80211_recalc_ps(sdata->local, -1);
1356 mutex_unlock(&sdata->local->iflist_mtx);
1358 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1362 * We've received a probe response, but are not sure whether
1363 * we have or will be receiving any beacons or data, so let's
1364 * schedule the timers again, just in case.
1366 mod_beacon_timer(sdata);
1368 mod_timer(&ifmgd->conn_mon_timer,
1369 round_jiffies_up(jiffies +
1370 IEEE80211_CONNECTION_IDLE_TIME));
1375 * This is the canonical list of information elements we care about,
1376 * the filter code also gives us all changes to the Microsoft OUI
1377 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1379 * We implement beacon filtering in software since that means we can
1380 * avoid processing the frame here and in cfg80211, and userspace
1381 * will not be able to tell whether the hardware supports it or not.
1383 * XXX: This list needs to be dynamic -- userspace needs to be able to
1384 * add items it requires. It also needs to be able to tell us to
1385 * look out for other vendor IEs.
1387 static const u64 care_about_ies =
1388 (1ULL << WLAN_EID_COUNTRY) |
1389 (1ULL << WLAN_EID_ERP_INFO) |
1390 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1391 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1392 (1ULL << WLAN_EID_HT_CAPABILITY) |
1393 (1ULL << WLAN_EID_HT_INFORMATION);
1395 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1396 struct ieee80211_mgmt *mgmt,
1398 struct ieee80211_rx_status *rx_status)
1400 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1401 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1403 struct ieee802_11_elems elems;
1404 struct ieee80211_local *local = sdata->local;
1406 bool erp_valid, directed_tim = false;
1411 ASSERT_MGD_MTX(ifmgd);
1413 /* Process beacon from the current BSS */
1414 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1418 if (rx_status->freq != local->hw.conf.channel->center_freq)
1422 * We might have received a number of frames, among them a
1423 * disassoc frame and a beacon...
1425 if (!ifmgd->associated)
1428 bssid = ifmgd->associated->bssid;
1431 * And in theory even frames from a different AP we were just
1432 * associated to a split-second ago!
1434 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1437 /* Track average RSSI from the Beacon frames of the current AP */
1438 ifmgd->last_beacon_signal = rx_status->signal;
1439 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1440 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1441 ifmgd->ave_beacon_signal = rx_status->signal;
1442 ifmgd->last_cqm_event_signal = 0;
1444 ifmgd->ave_beacon_signal =
1445 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1446 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1447 ifmgd->ave_beacon_signal) / 16;
1449 if (bss_conf->cqm_rssi_thold &&
1450 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1451 int sig = ifmgd->ave_beacon_signal / 16;
1452 int last_event = ifmgd->last_cqm_event_signal;
1453 int thold = bss_conf->cqm_rssi_thold;
1454 int hyst = bss_conf->cqm_rssi_hyst;
1456 (last_event == 0 || sig < last_event - hyst)) {
1457 ifmgd->last_cqm_event_signal = sig;
1458 ieee80211_cqm_rssi_notify(
1460 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1462 } else if (sig > thold &&
1463 (last_event == 0 || sig > last_event + hyst)) {
1464 ifmgd->last_cqm_event_signal = sig;
1465 ieee80211_cqm_rssi_notify(
1467 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1472 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1473 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1474 if (net_ratelimit()) {
1475 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1476 "to a received beacon\n", sdata->name);
1479 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1480 mutex_lock(&local->iflist_mtx);
1481 ieee80211_recalc_ps(local, -1);
1482 mutex_unlock(&local->iflist_mtx);
1486 * Push the beacon loss detection into the future since
1487 * we are processing a beacon from the AP just now.
1489 mod_beacon_timer(sdata);
1491 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1492 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1493 len - baselen, &elems,
1494 care_about_ies, ncrc);
1496 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1497 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1500 if (ncrc != ifmgd->beacon_crc) {
1501 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1504 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1505 elems.wmm_param_len);
1508 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1510 if (local->hw.conf.dynamic_ps_timeout > 0) {
1511 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1512 ieee80211_hw_config(local,
1513 IEEE80211_CONF_CHANGE_PS);
1514 ieee80211_send_nullfunc(local, sdata, 0);
1516 local->pspolling = true;
1519 * Here is assumed that the driver will be
1520 * able to send ps-poll frame and receive a
1521 * response even though power save mode is
1522 * enabled, but some drivers might require
1523 * to disable power save here. This needs
1524 * to be investigated.
1526 ieee80211_send_pspoll(local, sdata);
1531 if (ncrc == ifmgd->beacon_crc)
1533 ifmgd->beacon_crc = ncrc;
1535 if (elems.erp_info && elems.erp_info_len >= 1) {
1537 erp_value = elems.erp_info[0];
1541 changed |= ieee80211_handle_bss_capability(sdata,
1542 le16_to_cpu(mgmt->u.beacon.capab_info),
1543 erp_valid, erp_value);
1546 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1547 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1548 struct sta_info *sta;
1549 struct ieee80211_supported_band *sband;
1550 u16 ap_ht_cap_flags;
1554 sta = sta_info_get(sdata, bssid);
1555 if (WARN_ON(!sta)) {
1560 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1562 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1563 elems.ht_cap_elem, &sta->sta.ht_cap);
1565 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1569 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1570 bssid, ap_ht_cap_flags);
1573 /* Note: country IE parsing is done for us by cfg80211 */
1574 if (elems.country_elem) {
1575 /* TODO: IBSS also needs this */
1576 if (elems.pwr_constr_elem)
1577 ieee80211_handle_pwr_constr(sdata,
1578 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1579 elems.pwr_constr_elem,
1580 elems.pwr_constr_elem_len);
1583 ieee80211_bss_info_change_notify(sdata, changed);
1586 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1587 struct sk_buff *skb)
1589 struct ieee80211_local *local = sdata->local;
1590 struct ieee80211_mgmt *mgmt;
1594 return RX_DROP_MONITOR;
1596 mgmt = (struct ieee80211_mgmt *) skb->data;
1597 fc = le16_to_cpu(mgmt->frame_control);
1599 switch (fc & IEEE80211_FCTL_STYPE) {
1600 case IEEE80211_STYPE_PROBE_RESP:
1601 case IEEE80211_STYPE_BEACON:
1602 case IEEE80211_STYPE_DEAUTH:
1603 case IEEE80211_STYPE_DISASSOC:
1604 case IEEE80211_STYPE_ACTION:
1605 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1606 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1610 return RX_DROP_MONITOR;
1613 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1614 struct sk_buff *skb)
1616 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1617 struct ieee80211_rx_status *rx_status;
1618 struct ieee80211_mgmt *mgmt;
1619 enum rx_mgmt_action rma = RX_MGMT_NONE;
1622 rx_status = (struct ieee80211_rx_status *) skb->cb;
1623 mgmt = (struct ieee80211_mgmt *) skb->data;
1624 fc = le16_to_cpu(mgmt->frame_control);
1626 mutex_lock(&ifmgd->mtx);
1628 if (ifmgd->associated &&
1629 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1630 switch (fc & IEEE80211_FCTL_STYPE) {
1631 case IEEE80211_STYPE_BEACON:
1632 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1635 case IEEE80211_STYPE_PROBE_RESP:
1636 ieee80211_rx_mgmt_probe_resp(sdata, skb);
1638 case IEEE80211_STYPE_DEAUTH:
1639 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1641 case IEEE80211_STYPE_DISASSOC:
1642 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1644 case IEEE80211_STYPE_ACTION:
1645 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1648 ieee80211_sta_process_chanswitch(sdata,
1649 &mgmt->u.action.u.chan_switch.sw_elem,
1650 (void *)ifmgd->associated->priv);
1653 mutex_unlock(&ifmgd->mtx);
1659 case RX_MGMT_CFG80211_DEAUTH:
1660 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1662 case RX_MGMT_CFG80211_DISASSOC:
1663 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1666 WARN(1, "unexpected: %d", rma);
1671 mutex_unlock(&ifmgd->mtx);
1673 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
1674 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
1675 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1681 static void ieee80211_sta_timer(unsigned long data)
1683 struct ieee80211_sub_if_data *sdata =
1684 (struct ieee80211_sub_if_data *) data;
1685 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1686 struct ieee80211_local *local = sdata->local;
1688 if (local->quiescing) {
1689 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1693 ieee80211_queue_work(&local->hw, &ifmgd->work);
1696 static void ieee80211_sta_work(struct work_struct *work)
1698 struct ieee80211_sub_if_data *sdata =
1699 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1700 struct ieee80211_local *local = sdata->local;
1701 struct ieee80211_if_managed *ifmgd;
1702 struct sk_buff *skb;
1704 if (!ieee80211_sdata_running(sdata))
1707 if (local->scanning)
1710 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1714 * ieee80211_queue_work() should have picked up most cases,
1715 * here we'll pick the the rest.
1717 if (WARN(local->suspended, "STA MLME work scheduled while "
1718 "going to suspend\n"))
1721 ifmgd = &sdata->u.mgd;
1723 /* first process frames to avoid timing out while a frame is pending */
1724 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1725 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1727 /* then process the rest of the work */
1728 mutex_lock(&ifmgd->mtx);
1730 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1731 IEEE80211_STA_CONNECTION_POLL) &&
1732 ifmgd->associated) {
1735 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1736 if (time_is_after_jiffies(ifmgd->probe_timeout))
1737 run_again(ifmgd, ifmgd->probe_timeout);
1739 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1740 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1741 printk(KERN_DEBUG "No probe response from AP %pM"
1742 " after %dms, try %d\n", bssid,
1743 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1744 ifmgd->probe_send_count);
1746 ieee80211_mgd_probe_ap_send(sdata);
1749 * We actually lost the connection ... or did we?
1752 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1753 IEEE80211_STA_BEACON_POLL);
1754 printk(KERN_DEBUG "No probe response from AP %pM"
1755 " after %dms, disconnecting.\n",
1756 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
1757 ieee80211_set_disassoc(sdata, true);
1758 ieee80211_recalc_idle(local);
1759 mutex_unlock(&ifmgd->mtx);
1761 * must be outside lock due to cfg80211,
1762 * but that's not a problem.
1764 ieee80211_send_deauth_disassoc(sdata, bssid,
1765 IEEE80211_STYPE_DEAUTH,
1766 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1768 mutex_lock(&ifmgd->mtx);
1772 mutex_unlock(&ifmgd->mtx);
1775 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1777 struct ieee80211_sub_if_data *sdata =
1778 (struct ieee80211_sub_if_data *) data;
1779 struct ieee80211_local *local = sdata->local;
1781 if (local->quiescing)
1784 ieee80211_queue_work(&sdata->local->hw,
1785 &sdata->u.mgd.beacon_connection_loss_work);
1788 static void ieee80211_sta_conn_mon_timer(unsigned long data)
1790 struct ieee80211_sub_if_data *sdata =
1791 (struct ieee80211_sub_if_data *) data;
1792 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1793 struct ieee80211_local *local = sdata->local;
1795 if (local->quiescing)
1798 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
1801 static void ieee80211_sta_monitor_work(struct work_struct *work)
1803 struct ieee80211_sub_if_data *sdata =
1804 container_of(work, struct ieee80211_sub_if_data,
1805 u.mgd.monitor_work);
1807 ieee80211_mgd_probe_ap(sdata, false);
1810 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1812 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1813 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1814 IEEE80211_STA_CONNECTION_POLL);
1816 /* let's probe the connection once */
1817 ieee80211_queue_work(&sdata->local->hw,
1818 &sdata->u.mgd.monitor_work);
1819 /* and do all the other regular work too */
1820 ieee80211_queue_work(&sdata->local->hw,
1821 &sdata->u.mgd.work);
1826 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1828 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1831 * we need to use atomic bitops for the running bits
1832 * only because both timers might fire at the same
1833 * time -- the code here is properly synchronised.
1836 cancel_work_sync(&ifmgd->work);
1837 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
1838 if (del_timer_sync(&ifmgd->timer))
1839 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1841 cancel_work_sync(&ifmgd->chswitch_work);
1842 if (del_timer_sync(&ifmgd->chswitch_timer))
1843 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1845 cancel_work_sync(&ifmgd->monitor_work);
1846 /* these will just be re-established on connection */
1847 del_timer_sync(&ifmgd->conn_mon_timer);
1848 del_timer_sync(&ifmgd->bcn_mon_timer);
1851 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1853 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1855 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1856 add_timer(&ifmgd->timer);
1857 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1858 add_timer(&ifmgd->chswitch_timer);
1862 /* interface setup */
1863 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1865 struct ieee80211_if_managed *ifmgd;
1867 ifmgd = &sdata->u.mgd;
1868 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1869 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
1870 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1871 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1872 ieee80211_beacon_connection_loss_work);
1873 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1874 (unsigned long) sdata);
1875 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1876 (unsigned long) sdata);
1877 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1878 (unsigned long) sdata);
1879 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1880 (unsigned long) sdata);
1881 skb_queue_head_init(&ifmgd->skb_queue);
1885 mutex_init(&ifmgd->mtx);
1887 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1888 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1890 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1893 /* scan finished notification */
1894 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1896 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1898 /* Restart STA timers */
1900 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1901 ieee80211_restart_sta_timer(sdata);
1905 int ieee80211_max_network_latency(struct notifier_block *nb,
1906 unsigned long data, void *dummy)
1908 s32 latency_usec = (s32) data;
1909 struct ieee80211_local *local =
1910 container_of(nb, struct ieee80211_local,
1911 network_latency_notifier);
1913 mutex_lock(&local->iflist_mtx);
1914 ieee80211_recalc_ps(local, latency_usec);
1915 mutex_unlock(&local->iflist_mtx);
1921 static enum work_done_result
1922 ieee80211_probe_auth_done(struct ieee80211_work *wk,
1923 struct sk_buff *skb)
1926 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1927 return WORK_DONE_DESTROY;
1930 if (wk->type == IEEE80211_WORK_AUTH) {
1931 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1932 return WORK_DONE_DESTROY;
1935 mutex_lock(&wk->sdata->u.mgd.mtx);
1936 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1937 mutex_unlock(&wk->sdata->u.mgd.mtx);
1939 wk->type = IEEE80211_WORK_AUTH;
1940 wk->probe_auth.tries = 0;
1941 return WORK_DONE_REQUEUE;
1944 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1945 struct cfg80211_auth_request *req)
1948 struct ieee80211_work *wk;
1951 if (req->local_state_change)
1952 return 0; /* no need to update mac80211 state */
1954 switch (req->auth_type) {
1955 case NL80211_AUTHTYPE_OPEN_SYSTEM:
1956 auth_alg = WLAN_AUTH_OPEN;
1958 case NL80211_AUTHTYPE_SHARED_KEY:
1959 auth_alg = WLAN_AUTH_SHARED_KEY;
1961 case NL80211_AUTHTYPE_FT:
1962 auth_alg = WLAN_AUTH_FT;
1964 case NL80211_AUTHTYPE_NETWORK_EAP:
1965 auth_alg = WLAN_AUTH_LEAP;
1971 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1975 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
1977 if (req->ie && req->ie_len) {
1978 memcpy(wk->ie, req->ie, req->ie_len);
1979 wk->ie_len = req->ie_len;
1982 if (req->key && req->key_len) {
1983 wk->probe_auth.key_len = req->key_len;
1984 wk->probe_auth.key_idx = req->key_idx;
1985 memcpy(wk->probe_auth.key, req->key, req->key_len);
1988 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
1989 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
1990 wk->probe_auth.ssid_len = ssid[1];
1992 wk->probe_auth.algorithm = auth_alg;
1993 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
1995 /* if we already have a probe, don't probe again */
1996 if (req->bss->proberesp_ies)
1997 wk->type = IEEE80211_WORK_AUTH;
1999 wk->type = IEEE80211_WORK_DIRECT_PROBE;
2000 wk->chan = req->bss->channel;
2002 wk->done = ieee80211_probe_auth_done;
2004 ieee80211_add_work(wk);
2008 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2009 struct sk_buff *skb)
2011 struct ieee80211_mgmt *mgmt;
2015 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2016 return WORK_DONE_DESTROY;
2019 mgmt = (void *)skb->data;
2020 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2022 if (status == WLAN_STATUS_SUCCESS) {
2023 mutex_lock(&wk->sdata->u.mgd.mtx);
2024 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2025 mutex_unlock(&wk->sdata->u.mgd.mtx);
2026 /* oops -- internal error -- send timeout for now */
2027 cfg80211_send_assoc_timeout(wk->sdata->dev,
2029 return WORK_DONE_DESTROY;
2031 mutex_unlock(&wk->sdata->u.mgd.mtx);
2034 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2035 return WORK_DONE_DESTROY;
2038 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2039 struct cfg80211_assoc_request *req)
2041 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2042 struct ieee80211_bss *bss = (void *)req->bss->priv;
2043 struct ieee80211_work *wk;
2047 mutex_lock(&ifmgd->mtx);
2048 if (ifmgd->associated) {
2049 if (!req->prev_bssid ||
2050 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2053 * We are already associated and the request was not a
2054 * reassociation request from the current BSS, so
2057 mutex_unlock(&ifmgd->mtx);
2061 /* Trying to reassociate - clear previous association state */
2062 ieee80211_set_disassoc(sdata, true);
2064 mutex_unlock(&ifmgd->mtx);
2066 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2070 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2071 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2073 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2074 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2075 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2076 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2077 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2080 if (req->ie && req->ie_len) {
2081 memcpy(wk->ie, req->ie, req->ie_len);
2082 wk->ie_len = req->ie_len;
2086 wk->assoc.bss = req->bss;
2088 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2090 /* new association always uses requested smps mode */
2091 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2092 if (ifmgd->powersave)
2093 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2095 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2097 ifmgd->ap_smps = ifmgd->req_smps;
2099 wk->assoc.smps = ifmgd->ap_smps;
2101 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2102 * We still associate in non-HT mode (11a/b/g) if any one of these
2103 * ciphers is configured as pairwise.
2104 * We can set this to true for non-11n hardware, that'll be checked
2105 * separately along with the peer capabilities.
2107 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2108 wk->assoc.capability = req->bss->capability;
2109 wk->assoc.wmm_used = bss->wmm_used;
2110 wk->assoc.supp_rates = bss->supp_rates;
2111 wk->assoc.supp_rates_len = bss->supp_rates_len;
2112 wk->assoc.ht_information_ie =
2113 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2115 if (bss->wmm_used && bss->uapsd_supported &&
2116 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2117 wk->assoc.uapsd_used = true;
2118 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2120 wk->assoc.uapsd_used = false;
2121 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2124 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2125 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2126 wk->assoc.ssid_len = ssid[1];
2128 if (req->prev_bssid)
2129 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2131 wk->type = IEEE80211_WORK_ASSOC;
2132 wk->chan = req->bss->channel;
2134 wk->done = ieee80211_assoc_done;
2137 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2138 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2140 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2141 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2144 if (req->crypto.control_port)
2145 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2147 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2149 ieee80211_add_work(wk);
2153 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2154 struct cfg80211_deauth_request *req,
2157 struct ieee80211_local *local = sdata->local;
2158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2159 struct ieee80211_work *wk;
2160 const u8 *bssid = req->bss->bssid;
2162 mutex_lock(&ifmgd->mtx);
2164 if (ifmgd->associated == req->bss) {
2165 bssid = req->bss->bssid;
2166 ieee80211_set_disassoc(sdata, true);
2167 mutex_unlock(&ifmgd->mtx);
2169 bool not_auth_yet = false;
2171 mutex_unlock(&ifmgd->mtx);
2173 mutex_lock(&local->work_mtx);
2174 list_for_each_entry(wk, &local->work_list, list) {
2175 if (wk->sdata != sdata)
2178 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2179 wk->type != IEEE80211_WORK_AUTH)
2182 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2185 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2186 list_del_rcu(&wk->list);
2190 mutex_unlock(&local->work_mtx);
2193 * If somebody requests authentication and we haven't
2194 * sent out an auth frame yet there's no need to send
2195 * out a deauth frame either. If the state was PROBE,
2196 * then this is the case. If it's AUTH we have sent a
2197 * frame, and if it's IDLE we have completed the auth
2201 __cfg80211_auth_canceled(sdata->dev, bssid);
2206 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2207 sdata->name, bssid, req->reason_code);
2209 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2210 req->reason_code, cookie,
2211 !req->local_state_change);
2213 ieee80211_recalc_idle(sdata->local);
2218 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2219 struct cfg80211_disassoc_request *req,
2222 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2225 mutex_lock(&ifmgd->mtx);
2228 * cfg80211 should catch this ... but it's racy since
2229 * we can receive a disassoc frame, process it, hand it
2230 * to cfg80211 while that's in a locked section already
2231 * trying to tell us that the user wants to disconnect.
2233 if (ifmgd->associated != req->bss) {
2234 mutex_unlock(&ifmgd->mtx);
2238 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2239 sdata->name, req->bss->bssid, req->reason_code);
2241 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2242 ieee80211_set_disassoc(sdata, false);
2244 mutex_unlock(&ifmgd->mtx);
2246 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2247 IEEE80211_STYPE_DISASSOC, req->reason_code,
2248 cookie, !req->local_state_change);
2249 sta_info_destroy_addr(sdata, bssid);
2251 ieee80211_recalc_idle(sdata->local);
2256 int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
2257 struct ieee80211_channel *chan,
2258 enum nl80211_channel_type channel_type,
2259 const u8 *buf, size_t len, u64 *cookie)
2261 struct ieee80211_local *local = sdata->local;
2262 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2263 struct sk_buff *skb;
2265 /* Check that we are on the requested channel for transmission */
2266 if ((chan != local->tmp_channel ||
2267 channel_type != local->tmp_channel_type) &&
2268 (chan != local->oper_channel ||
2269 channel_type != local->oper_channel_type))
2272 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2275 skb_reserve(skb, local->hw.extra_tx_headroom);
2277 memcpy(skb_put(skb, len), buf, len);
2279 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
2280 IEEE80211_SKB_CB(skb)->flags |=
2281 IEEE80211_TX_INTFL_DONT_ENCRYPT;
2282 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2283 IEEE80211_TX_CTL_REQ_TX_STATUS;
2284 skb->dev = sdata->dev;
2285 ieee80211_tx_skb(sdata, skb);
2287 *cookie = (unsigned long) skb;
2291 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2292 enum nl80211_cqm_rssi_threshold_event rssi_event,
2295 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2297 trace_api_cqm_rssi_notify(sdata, rssi_event);
2299 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2301 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);