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 if (local->tmp_channel)
178 local->tmp_channel_type = channel_type;
179 local->oper_channel_type = channel_type;
182 /* channel_type change automatically detected */
183 ieee80211_hw_config(local, 0);
186 sta = sta_info_get(sdata, bssid);
188 rate_control_rate_update(local, sband, sta,
189 IEEE80211_RC_HT_CHANGED,
190 local->oper_channel_type);
198 ht_opmode = le16_to_cpu(hti->operation_mode);
200 /* if bss configuration changed store the new one */
201 if (!sdata->ht_opmode_valid ||
202 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
203 changed |= BSS_CHANGED_HT;
204 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
205 sdata->ht_opmode_valid = true;
211 /* frame sending functions */
213 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
214 const u8 *bssid, u16 stype, u16 reason,
215 void *cookie, bool send_frame)
217 struct ieee80211_local *local = sdata->local;
218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
220 struct ieee80211_mgmt *mgmt;
222 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
224 printk(KERN_DEBUG "%s: failed to allocate buffer for "
225 "deauth/disassoc frame\n", sdata->name);
228 skb_reserve(skb, local->hw.extra_tx_headroom);
230 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
232 memcpy(mgmt->da, bssid, ETH_ALEN);
233 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
234 memcpy(mgmt->bssid, bssid, ETH_ALEN);
235 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
237 /* u.deauth.reason_code == u.disassoc.reason_code */
238 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
240 if (stype == IEEE80211_STYPE_DEAUTH)
242 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
244 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
247 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
249 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
250 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
251 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
254 ieee80211_tx_skb(sdata, skb);
259 void ieee80211_send_pspoll(struct ieee80211_local *local,
260 struct ieee80211_sub_if_data *sdata)
262 struct ieee80211_pspoll *pspoll;
265 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
269 pspoll = (struct ieee80211_pspoll *) skb->data;
270 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
272 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
273 ieee80211_tx_skb(sdata, skb);
276 void ieee80211_send_nullfunc(struct ieee80211_local *local,
277 struct ieee80211_sub_if_data *sdata,
281 struct ieee80211_hdr_3addr *nullfunc;
283 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
287 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
289 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
291 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
292 ieee80211_tx_skb(sdata, skb);
295 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
296 struct ieee80211_sub_if_data *sdata)
299 struct ieee80211_hdr *nullfunc;
302 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
305 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
307 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
308 "nullfunc frame\n", sdata->name);
311 skb_reserve(skb, local->hw.extra_tx_headroom);
313 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
314 memset(nullfunc, 0, 30);
315 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
316 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
317 nullfunc->frame_control = fc;
318 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
319 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
320 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
321 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
323 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
324 ieee80211_tx_skb(sdata, skb);
327 /* spectrum management related things */
328 static void ieee80211_chswitch_work(struct work_struct *work)
330 struct ieee80211_sub_if_data *sdata =
331 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
332 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
334 if (!ieee80211_sdata_running(sdata))
337 mutex_lock(&ifmgd->mtx);
338 if (!ifmgd->associated)
341 sdata->local->oper_channel = sdata->local->csa_channel;
342 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
344 /* XXX: shouldn't really modify cfg80211-owned data! */
345 ifmgd->associated->channel = sdata->local->oper_channel;
347 ieee80211_wake_queues_by_reason(&sdata->local->hw,
348 IEEE80211_QUEUE_STOP_REASON_CSA);
350 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
351 mutex_unlock(&ifmgd->mtx);
354 static void ieee80211_chswitch_timer(unsigned long data)
356 struct ieee80211_sub_if_data *sdata =
357 (struct ieee80211_sub_if_data *) data;
358 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
360 if (sdata->local->quiescing) {
361 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
365 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
368 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
369 struct ieee80211_channel_sw_ie *sw_elem,
370 struct ieee80211_bss *bss)
372 struct cfg80211_bss *cbss =
373 container_of((void *)bss, struct cfg80211_bss, priv);
374 struct ieee80211_channel *new_ch;
375 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
376 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
378 ASSERT_MGD_MTX(ifmgd);
380 if (!ifmgd->associated)
383 if (sdata->local->scanning)
386 /* Disregard subsequent beacons if we are already running a timer
389 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
392 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
393 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
396 sdata->local->csa_channel = new_ch;
398 if (sw_elem->count <= 1) {
399 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
401 ieee80211_stop_queues_by_reason(&sdata->local->hw,
402 IEEE80211_QUEUE_STOP_REASON_CSA);
403 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
404 mod_timer(&ifmgd->chswitch_timer,
406 msecs_to_jiffies(sw_elem->count *
407 cbss->beacon_interval));
411 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
412 u16 capab_info, u8 *pwr_constr_elem,
413 u8 pwr_constr_elem_len)
415 struct ieee80211_conf *conf = &sdata->local->hw.conf;
417 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
420 /* Power constraint IE length should be 1 octet */
421 if (pwr_constr_elem_len != 1)
424 if ((*pwr_constr_elem <= conf->channel->max_power) &&
425 (*pwr_constr_elem != sdata->local->power_constr_level)) {
426 sdata->local->power_constr_level = *pwr_constr_elem;
427 ieee80211_hw_config(sdata->local, 0);
432 static void ieee80211_enable_ps(struct ieee80211_local *local,
433 struct ieee80211_sub_if_data *sdata)
435 struct ieee80211_conf *conf = &local->hw.conf;
438 * If we are scanning right now then the parameters will
439 * take effect when scan finishes.
444 if (conf->dynamic_ps_timeout > 0 &&
445 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
446 mod_timer(&local->dynamic_ps_timer, jiffies +
447 msecs_to_jiffies(conf->dynamic_ps_timeout));
449 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
450 ieee80211_send_nullfunc(local, sdata, 1);
452 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
453 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
456 conf->flags |= IEEE80211_CONF_PS;
457 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
461 static void ieee80211_change_ps(struct ieee80211_local *local)
463 struct ieee80211_conf *conf = &local->hw.conf;
465 if (local->ps_sdata) {
466 ieee80211_enable_ps(local, local->ps_sdata);
467 } else if (conf->flags & IEEE80211_CONF_PS) {
468 conf->flags &= ~IEEE80211_CONF_PS;
469 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
470 del_timer_sync(&local->dynamic_ps_timer);
471 cancel_work_sync(&local->dynamic_ps_enable_work);
475 /* need to hold RTNL or interface lock */
476 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
478 struct ieee80211_sub_if_data *sdata, *found = NULL;
482 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
483 local->ps_sdata = NULL;
487 if (!list_empty(&local->work_list)) {
488 local->ps_sdata = NULL;
492 list_for_each_entry(sdata, &local->interfaces, list) {
493 if (!ieee80211_sdata_running(sdata))
495 if (sdata->vif.type != NL80211_IFTYPE_STATION)
501 if (count == 1 && found->u.mgd.powersave &&
502 found->u.mgd.associated &&
503 found->u.mgd.associated->beacon_ies &&
504 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
505 IEEE80211_STA_CONNECTION_POLL))) {
509 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
511 beaconint_us = ieee80211_tu_to_usec(
512 found->vif.bss_conf.beacon_int);
514 timeout = local->hw.conf.dynamic_ps_forced_timeout;
517 * The 2 second value is there for compatibility until
518 * the PM_QOS_NETWORK_LATENCY is configured with real
521 if (latency == 2000000000)
523 else if (latency <= 50000)
525 else if (latency <= 100000)
527 else if (latency <= 500000)
532 local->hw.conf.dynamic_ps_timeout = timeout;
534 if (beaconint_us > latency) {
535 local->ps_sdata = NULL;
537 struct ieee80211_bss *bss;
541 bss = (void *)found->u.mgd.associated->priv;
542 dtimper = bss->dtim_period;
544 /* If the TIM IE is invalid, pretend the value is 1 */
547 else if (dtimper > 1)
548 maxslp = min_t(int, dtimper,
549 latency / beaconint_us);
551 local->hw.conf.max_sleep_period = maxslp;
552 local->hw.conf.ps_dtim_period = dtimper;
553 local->ps_sdata = found;
556 local->ps_sdata = NULL;
560 ieee80211_change_ps(local);
563 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
565 struct ieee80211_local *local =
566 container_of(work, struct ieee80211_local,
567 dynamic_ps_disable_work);
569 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
570 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
571 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
574 ieee80211_wake_queues_by_reason(&local->hw,
575 IEEE80211_QUEUE_STOP_REASON_PS);
578 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
580 struct ieee80211_local *local =
581 container_of(work, struct ieee80211_local,
582 dynamic_ps_enable_work);
583 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
584 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
586 /* can only happen when PS was just disabled anyway */
590 if (local->hw.conf.flags & IEEE80211_CONF_PS)
593 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
594 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
595 ieee80211_send_nullfunc(local, sdata, 1);
597 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
598 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
599 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
600 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
601 local->hw.conf.flags |= IEEE80211_CONF_PS;
602 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
606 void ieee80211_dynamic_ps_timer(unsigned long data)
608 struct ieee80211_local *local = (void *) data;
610 if (local->quiescing || local->suspended)
613 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
617 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
618 struct ieee80211_if_managed *ifmgd,
619 u8 *wmm_param, size_t wmm_param_len)
621 struct ieee80211_tx_queue_params params;
624 u8 *pos, uapsd_queues = 0;
626 if (!local->ops->conf_tx)
629 if (local->hw.queues < 4)
635 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
638 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
639 uapsd_queues = local->uapsd_queues;
641 count = wmm_param[6] & 0x0f;
642 if (count == ifmgd->wmm_last_param_set)
644 ifmgd->wmm_last_param_set = count;
647 left = wmm_param_len - 8;
649 memset(¶ms, 0, sizeof(params));
652 for (; left >= 4; left -= 4, pos += 4) {
653 int aci = (pos[0] >> 5) & 0x03;
654 int acm = (pos[0] >> 4) & 0x01;
662 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
663 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
669 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
670 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
676 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
677 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
684 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
685 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
690 params.aifs = pos[0] & 0x0f;
691 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
692 params.cw_min = ecw2cw(pos[1] & 0x0f);
693 params.txop = get_unaligned_le16(pos + 2);
694 params.uapsd = uapsd;
696 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
697 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
698 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
699 wiphy_name(local->hw.wiphy), queue, aci, acm,
700 params.aifs, params.cw_min, params.cw_max, params.txop,
703 if (drv_conf_tx(local, queue, ¶ms))
704 printk(KERN_DEBUG "%s: failed to set TX queue "
705 "parameters for queue %d\n",
706 wiphy_name(local->hw.wiphy), queue);
709 /* enable WMM or activate new settings */
710 local->hw.conf.flags |= IEEE80211_CONF_QOS;
711 drv_config(local, IEEE80211_CONF_CHANGE_QOS);
714 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
715 u16 capab, bool erp_valid, u8 erp)
717 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
720 bool use_short_preamble;
724 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
725 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
727 use_protection = false;
728 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
731 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
732 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
733 use_short_slot = true;
735 if (use_protection != bss_conf->use_cts_prot) {
736 bss_conf->use_cts_prot = use_protection;
737 changed |= BSS_CHANGED_ERP_CTS_PROT;
740 if (use_short_preamble != bss_conf->use_short_preamble) {
741 bss_conf->use_short_preamble = use_short_preamble;
742 changed |= BSS_CHANGED_ERP_PREAMBLE;
745 if (use_short_slot != bss_conf->use_short_slot) {
746 bss_conf->use_short_slot = use_short_slot;
747 changed |= BSS_CHANGED_ERP_SLOT;
753 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
754 struct cfg80211_bss *cbss,
755 u32 bss_info_changed)
757 struct ieee80211_bss *bss = (void *)cbss->priv;
758 struct ieee80211_local *local = sdata->local;
760 bss_info_changed |= BSS_CHANGED_ASSOC;
761 /* set timing information */
762 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
763 sdata->vif.bss_conf.timestamp = cbss->tsf;
765 bss_info_changed |= BSS_CHANGED_BEACON_INT;
766 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
767 cbss->capability, bss->has_erp_value, bss->erp_value);
769 sdata->u.mgd.associated = cbss;
770 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
772 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
774 /* just to be sure */
775 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
776 IEEE80211_STA_BEACON_POLL);
779 * Always handle WMM once after association regardless
780 * of the first value the AP uses. Setting -1 here has
781 * that effect because the AP values is an unsigned
784 sdata->u.mgd.wmm_last_param_set = -1;
786 ieee80211_led_assoc(local, 1);
788 sdata->vif.bss_conf.assoc = 1;
790 * For now just always ask the driver to update the basic rateset
791 * when we have associated, we aren't checking whether it actually
794 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
796 /* And the BSSID changed - we're associated now */
797 bss_info_changed |= BSS_CHANGED_BSSID;
799 /* Tell the driver to monitor connection quality (if supported) */
800 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
801 sdata->vif.bss_conf.cqm_rssi_thold)
802 bss_info_changed |= BSS_CHANGED_CQM;
804 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
806 mutex_lock(&local->iflist_mtx);
807 ieee80211_recalc_ps(local, -1);
808 ieee80211_recalc_smps(local, sdata);
809 mutex_unlock(&local->iflist_mtx);
811 netif_tx_start_all_queues(sdata->dev);
812 netif_carrier_on(sdata->dev);
815 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
818 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
819 struct ieee80211_local *local = sdata->local;
820 struct sta_info *sta;
821 u32 changed = 0, config_changed = 0;
824 ASSERT_MGD_MTX(ifmgd);
826 if (WARN_ON(!ifmgd->associated))
829 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
831 ifmgd->associated = NULL;
832 memset(ifmgd->bssid, 0, ETH_ALEN);
835 * we need to commit the associated = NULL change because the
836 * scan code uses that to determine whether this iface should
837 * go to/wake up from powersave or not -- and could otherwise
838 * wake the queues erroneously.
843 * Thus, we can only afterwards stop the queues -- to account
844 * for the case where another CPU is finishing a scan at this
845 * time -- we don't want the scan code to enable queues.
848 netif_tx_stop_all_queues(sdata->dev);
849 netif_carrier_off(sdata->dev);
852 sta = sta_info_get(sdata, bssid);
854 set_sta_flags(sta, WLAN_STA_DISASSOC);
855 ieee80211_sta_tear_down_BA_sessions(sta);
859 changed |= ieee80211_reset_erp_info(sdata);
861 ieee80211_led_assoc(local, 0);
862 changed |= BSS_CHANGED_ASSOC;
863 sdata->vif.bss_conf.assoc = false;
865 ieee80211_set_wmm_default(sdata);
867 /* channel(_type) changes are handled by ieee80211_hw_config */
868 local->oper_channel_type = NL80211_CHAN_NO_HT;
870 /* on the next assoc, re-program HT parameters */
871 sdata->ht_opmode_valid = false;
873 local->power_constr_level = 0;
875 del_timer_sync(&local->dynamic_ps_timer);
876 cancel_work_sync(&local->dynamic_ps_enable_work);
878 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
879 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
880 config_changed |= IEEE80211_CONF_CHANGE_PS;
883 ieee80211_hw_config(local, config_changed);
885 /* And the BSSID changed -- not very interesting here */
886 changed |= BSS_CHANGED_BSSID;
887 ieee80211_bss_info_change_notify(sdata, changed);
890 sta_info_destroy_addr(sdata, bssid);
893 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
894 struct ieee80211_hdr *hdr)
897 * We can postpone the mgd.timer whenever receiving unicast frames
898 * from AP because we know that the connection is working both ways
899 * at that time. But multicast frames (and hence also beacons) must
900 * be ignored here, because we need to trigger the timer during
901 * data idle periods for sending the periodic probe request to the
902 * AP we're connected to.
904 if (is_multicast_ether_addr(hdr->addr1))
907 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
910 mod_timer(&sdata->u.mgd.conn_mon_timer,
911 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
914 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
916 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
919 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
920 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
921 ssid + 2, ssid[1], NULL, 0);
923 ifmgd->probe_send_count++;
924 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
925 run_again(ifmgd, ifmgd->probe_timeout);
928 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
932 bool already = false;
934 if (!ieee80211_sdata_running(sdata))
937 if (sdata->local->scanning)
940 if (sdata->local->tmp_channel)
943 mutex_lock(&ifmgd->mtx);
945 if (!ifmgd->associated)
948 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
949 if (beacon && net_ratelimit())
950 printk(KERN_DEBUG "%s: detected beacon loss from AP "
951 "- sending probe request\n", sdata->name);
955 * The driver/our work has already reported this event or the
956 * connection monitoring has kicked in and we have already sent
957 * a probe request. Or maybe the AP died and the driver keeps
958 * reporting until we disassociate...
960 * In either case we have to ignore the current call to this
961 * function (except for setting the correct probe reason bit)
962 * because otherwise we would reset the timer every time and
963 * never check whether we received a probe response!
965 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
966 IEEE80211_STA_CONNECTION_POLL))
970 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
972 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
977 mutex_lock(&sdata->local->iflist_mtx);
978 ieee80211_recalc_ps(sdata->local, -1);
979 mutex_unlock(&sdata->local->iflist_mtx);
981 ifmgd->probe_send_count = 0;
982 ieee80211_mgd_probe_ap_send(sdata);
984 mutex_unlock(&ifmgd->mtx);
987 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
990 struct ieee80211_local *local = sdata->local;
993 mutex_lock(&ifmgd->mtx);
994 if (!ifmgd->associated) {
995 mutex_unlock(&ifmgd->mtx);
999 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1001 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1003 ieee80211_set_disassoc(sdata, true);
1004 ieee80211_recalc_idle(local);
1005 mutex_unlock(&ifmgd->mtx);
1007 * must be outside lock due to cfg80211,
1008 * but that's not a problem.
1010 ieee80211_send_deauth_disassoc(sdata, bssid,
1011 IEEE80211_STYPE_DEAUTH,
1012 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1016 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1018 struct ieee80211_sub_if_data *sdata =
1019 container_of(work, struct ieee80211_sub_if_data,
1020 u.mgd.beacon_connection_loss_work);
1022 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1023 __ieee80211_connection_loss(sdata);
1025 ieee80211_mgd_probe_ap(sdata, true);
1028 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1030 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1031 struct ieee80211_hw *hw = &sdata->local->hw;
1033 trace_api_beacon_loss(sdata);
1035 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1036 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1038 EXPORT_SYMBOL(ieee80211_beacon_loss);
1040 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1042 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1043 struct ieee80211_hw *hw = &sdata->local->hw;
1045 trace_api_connection_loss(sdata);
1047 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1048 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1050 EXPORT_SYMBOL(ieee80211_connection_loss);
1053 static enum rx_mgmt_action __must_check
1054 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1055 struct ieee80211_mgmt *mgmt, size_t len)
1057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1058 const u8 *bssid = NULL;
1062 return RX_MGMT_NONE;
1064 ASSERT_MGD_MTX(ifmgd);
1066 bssid = ifmgd->associated->bssid;
1068 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1070 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1071 sdata->name, bssid, reason_code);
1073 ieee80211_set_disassoc(sdata, true);
1074 ieee80211_recalc_idle(sdata->local);
1076 return RX_MGMT_CFG80211_DEAUTH;
1080 static enum rx_mgmt_action __must_check
1081 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1082 struct ieee80211_mgmt *mgmt, size_t len)
1084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1088 return RX_MGMT_NONE;
1090 ASSERT_MGD_MTX(ifmgd);
1092 if (WARN_ON(!ifmgd->associated))
1093 return RX_MGMT_NONE;
1095 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1096 return RX_MGMT_NONE;
1098 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1100 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1101 sdata->name, mgmt->sa, reason_code);
1103 ieee80211_set_disassoc(sdata, true);
1104 ieee80211_recalc_idle(sdata->local);
1105 return RX_MGMT_CFG80211_DISASSOC;
1109 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1110 struct ieee80211_mgmt *mgmt, size_t len)
1112 struct ieee80211_sub_if_data *sdata = wk->sdata;
1113 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1114 struct ieee80211_local *local = sdata->local;
1115 struct ieee80211_supported_band *sband;
1116 struct sta_info *sta;
1117 struct cfg80211_bss *cbss = wk->assoc.bss;
1119 u32 rates, basic_rates;
1120 u16 capab_info, aid;
1121 struct ieee802_11_elems elems;
1122 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1125 bool have_higher_than_11mbit = false;
1126 u16 ap_ht_cap_flags;
1128 /* AssocResp and ReassocResp have identical structure */
1130 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1131 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1133 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1134 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1135 "set\n", sdata->name, aid);
1136 aid &= ~(BIT(15) | BIT(14));
1138 pos = mgmt->u.assoc_resp.variable;
1139 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1141 if (!elems.supp_rates) {
1142 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1149 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
1151 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1152 " the AP\n", sdata->name);
1156 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1158 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1159 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1163 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1165 for (i = 0; i < elems.supp_rates_len; i++) {
1166 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1167 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1170 have_higher_than_11mbit = true;
1172 for (j = 0; j < sband->n_bitrates; j++) {
1173 if (sband->bitrates[j].bitrate == rate) {
1176 basic_rates |= BIT(j);
1182 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1183 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1184 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1187 have_higher_than_11mbit = true;
1189 for (j = 0; j < sband->n_bitrates; j++) {
1190 if (sband->bitrates[j].bitrate == rate) {
1193 basic_rates |= BIT(j);
1199 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1200 sdata->vif.bss_conf.basic_rates = basic_rates;
1202 /* cf. IEEE 802.11 9.2.12 */
1203 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1204 have_higher_than_11mbit)
1205 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1207 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1209 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1210 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1211 elems.ht_cap_elem, &sta->sta.ht_cap);
1213 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1215 rate_control_rate_init(sta);
1217 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1218 set_sta_flags(sta, WLAN_STA_MFP);
1220 if (elems.wmm_param)
1221 set_sta_flags(sta, WLAN_STA_WME);
1223 err = sta_info_insert(sta);
1226 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1227 " the AP (error %d)\n", sdata->name, err);
1231 if (elems.wmm_param)
1232 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1233 elems.wmm_param_len);
1235 ieee80211_set_wmm_default(sdata);
1237 local->oper_channel = wk->chan;
1239 if (elems.ht_info_elem && elems.wmm_param &&
1240 (sdata->local->hw.queues >= 4) &&
1241 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1242 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1243 cbss->bssid, ap_ht_cap_flags);
1245 /* set AID and assoc capability,
1246 * ieee80211_set_associated() will tell the driver */
1247 bss_conf->aid = aid;
1248 bss_conf->assoc_capability = capab_info;
1249 ieee80211_set_associated(sdata, cbss, changed);
1252 * If we're using 4-addr mode, let the AP know that we're
1253 * doing so, so that it can create the STA VLAN on its side
1255 if (ifmgd->use_4addr)
1256 ieee80211_send_4addr_nullfunc(local, sdata);
1259 * Start timer to probe the connection to the AP now.
1260 * Also start the timer that will detect beacon loss.
1262 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1263 mod_beacon_timer(sdata);
1269 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1270 struct ieee80211_mgmt *mgmt,
1272 struct ieee80211_rx_status *rx_status,
1273 struct ieee802_11_elems *elems,
1276 struct ieee80211_local *local = sdata->local;
1278 struct ieee80211_bss *bss;
1279 struct ieee80211_channel *channel;
1280 bool need_ps = false;
1282 if (sdata->u.mgd.associated) {
1283 bss = (void *)sdata->u.mgd.associated->priv;
1284 /* not previously set so we may need to recalc */
1285 need_ps = !bss->dtim_period;
1288 if (elems->ds_params && elems->ds_params_len == 1)
1289 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1291 freq = rx_status->freq;
1293 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1295 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1298 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1301 ieee80211_rx_bss_put(local, bss);
1303 if (!sdata->u.mgd.associated)
1307 mutex_lock(&local->iflist_mtx);
1308 ieee80211_recalc_ps(local, -1);
1309 mutex_unlock(&local->iflist_mtx);
1312 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1313 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1315 struct ieee80211_channel_sw_ie *sw_elem =
1316 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1317 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1322 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1323 struct sk_buff *skb)
1325 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1326 struct ieee80211_if_managed *ifmgd;
1327 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1328 size_t baselen, len = skb->len;
1329 struct ieee802_11_elems elems;
1331 ifmgd = &sdata->u.mgd;
1333 ASSERT_MGD_MTX(ifmgd);
1335 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1336 return; /* ignore ProbeResp to foreign address */
1338 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1342 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1345 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1347 if (ifmgd->associated &&
1348 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
1349 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1350 IEEE80211_STA_CONNECTION_POLL)) {
1351 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1352 IEEE80211_STA_BEACON_POLL);
1353 mutex_lock(&sdata->local->iflist_mtx);
1354 ieee80211_recalc_ps(sdata->local, -1);
1355 mutex_unlock(&sdata->local->iflist_mtx);
1357 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1361 * We've received a probe response, but are not sure whether
1362 * we have or will be receiving any beacons or data, so let's
1363 * schedule the timers again, just in case.
1365 mod_beacon_timer(sdata);
1367 mod_timer(&ifmgd->conn_mon_timer,
1368 round_jiffies_up(jiffies +
1369 IEEE80211_CONNECTION_IDLE_TIME));
1374 * This is the canonical list of information elements we care about,
1375 * the filter code also gives us all changes to the Microsoft OUI
1376 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1378 * We implement beacon filtering in software since that means we can
1379 * avoid processing the frame here and in cfg80211, and userspace
1380 * will not be able to tell whether the hardware supports it or not.
1382 * XXX: This list needs to be dynamic -- userspace needs to be able to
1383 * add items it requires. It also needs to be able to tell us to
1384 * look out for other vendor IEs.
1386 static const u64 care_about_ies =
1387 (1ULL << WLAN_EID_COUNTRY) |
1388 (1ULL << WLAN_EID_ERP_INFO) |
1389 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1390 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1391 (1ULL << WLAN_EID_HT_CAPABILITY) |
1392 (1ULL << WLAN_EID_HT_INFORMATION);
1394 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1395 struct ieee80211_mgmt *mgmt,
1397 struct ieee80211_rx_status *rx_status)
1399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1400 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1402 struct ieee802_11_elems elems;
1403 struct ieee80211_local *local = sdata->local;
1405 bool erp_valid, directed_tim = false;
1410 ASSERT_MGD_MTX(ifmgd);
1412 /* Process beacon from the current BSS */
1413 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1417 if (rx_status->freq != local->hw.conf.channel->center_freq)
1421 * We might have received a number of frames, among them a
1422 * disassoc frame and a beacon...
1424 if (!ifmgd->associated)
1427 bssid = ifmgd->associated->bssid;
1430 * And in theory even frames from a different AP we were just
1431 * associated to a split-second ago!
1433 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1436 /* Track average RSSI from the Beacon frames of the current AP */
1437 ifmgd->last_beacon_signal = rx_status->signal;
1438 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1439 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1440 ifmgd->ave_beacon_signal = rx_status->signal;
1441 ifmgd->last_cqm_event_signal = 0;
1443 ifmgd->ave_beacon_signal =
1444 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1445 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1446 ifmgd->ave_beacon_signal) / 16;
1448 if (bss_conf->cqm_rssi_thold &&
1449 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1450 int sig = ifmgd->ave_beacon_signal / 16;
1451 int last_event = ifmgd->last_cqm_event_signal;
1452 int thold = bss_conf->cqm_rssi_thold;
1453 int hyst = bss_conf->cqm_rssi_hyst;
1455 (last_event == 0 || sig < last_event - hyst)) {
1456 ifmgd->last_cqm_event_signal = sig;
1457 ieee80211_cqm_rssi_notify(
1459 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1461 } else if (sig > thold &&
1462 (last_event == 0 || sig > last_event + hyst)) {
1463 ifmgd->last_cqm_event_signal = sig;
1464 ieee80211_cqm_rssi_notify(
1466 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1471 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1472 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1473 if (net_ratelimit()) {
1474 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1475 "to a received beacon\n", sdata->name);
1478 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1479 mutex_lock(&local->iflist_mtx);
1480 ieee80211_recalc_ps(local, -1);
1481 mutex_unlock(&local->iflist_mtx);
1485 * Push the beacon loss detection into the future since
1486 * we are processing a beacon from the AP just now.
1488 mod_beacon_timer(sdata);
1490 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1491 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1492 len - baselen, &elems,
1493 care_about_ies, ncrc);
1495 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1496 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1499 if (ncrc != ifmgd->beacon_crc) {
1500 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1503 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1504 elems.wmm_param_len);
1507 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1509 if (local->hw.conf.dynamic_ps_timeout > 0) {
1510 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1511 ieee80211_hw_config(local,
1512 IEEE80211_CONF_CHANGE_PS);
1513 ieee80211_send_nullfunc(local, sdata, 0);
1515 local->pspolling = true;
1518 * Here is assumed that the driver will be
1519 * able to send ps-poll frame and receive a
1520 * response even though power save mode is
1521 * enabled, but some drivers might require
1522 * to disable power save here. This needs
1523 * to be investigated.
1525 ieee80211_send_pspoll(local, sdata);
1530 if (ncrc == ifmgd->beacon_crc)
1532 ifmgd->beacon_crc = ncrc;
1534 if (elems.erp_info && elems.erp_info_len >= 1) {
1536 erp_value = elems.erp_info[0];
1540 changed |= ieee80211_handle_bss_capability(sdata,
1541 le16_to_cpu(mgmt->u.beacon.capab_info),
1542 erp_valid, erp_value);
1545 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1546 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1547 struct sta_info *sta;
1548 struct ieee80211_supported_band *sband;
1549 u16 ap_ht_cap_flags;
1553 sta = sta_info_get(sdata, bssid);
1554 if (WARN_ON(!sta)) {
1559 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1561 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1562 elems.ht_cap_elem, &sta->sta.ht_cap);
1564 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1568 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1569 bssid, ap_ht_cap_flags);
1572 /* Note: country IE parsing is done for us by cfg80211 */
1573 if (elems.country_elem) {
1574 /* TODO: IBSS also needs this */
1575 if (elems.pwr_constr_elem)
1576 ieee80211_handle_pwr_constr(sdata,
1577 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1578 elems.pwr_constr_elem,
1579 elems.pwr_constr_elem_len);
1582 ieee80211_bss_info_change_notify(sdata, changed);
1585 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1586 struct sk_buff *skb)
1588 struct ieee80211_local *local = sdata->local;
1589 struct ieee80211_mgmt *mgmt;
1593 return RX_DROP_MONITOR;
1595 mgmt = (struct ieee80211_mgmt *) skb->data;
1596 fc = le16_to_cpu(mgmt->frame_control);
1598 switch (fc & IEEE80211_FCTL_STYPE) {
1599 case IEEE80211_STYPE_PROBE_RESP:
1600 case IEEE80211_STYPE_BEACON:
1601 case IEEE80211_STYPE_DEAUTH:
1602 case IEEE80211_STYPE_DISASSOC:
1603 case IEEE80211_STYPE_ACTION:
1604 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1605 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1609 return RX_DROP_MONITOR;
1612 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1613 struct sk_buff *skb)
1615 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1616 struct ieee80211_rx_status *rx_status;
1617 struct ieee80211_mgmt *mgmt;
1618 enum rx_mgmt_action rma = RX_MGMT_NONE;
1621 rx_status = (struct ieee80211_rx_status *) skb->cb;
1622 mgmt = (struct ieee80211_mgmt *) skb->data;
1623 fc = le16_to_cpu(mgmt->frame_control);
1625 mutex_lock(&ifmgd->mtx);
1627 if (ifmgd->associated &&
1628 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1629 switch (fc & IEEE80211_FCTL_STYPE) {
1630 case IEEE80211_STYPE_BEACON:
1631 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1634 case IEEE80211_STYPE_PROBE_RESP:
1635 ieee80211_rx_mgmt_probe_resp(sdata, skb);
1637 case IEEE80211_STYPE_DEAUTH:
1638 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1640 case IEEE80211_STYPE_DISASSOC:
1641 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1643 case IEEE80211_STYPE_ACTION:
1644 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1647 ieee80211_sta_process_chanswitch(sdata,
1648 &mgmt->u.action.u.chan_switch.sw_elem,
1649 (void *)ifmgd->associated->priv);
1652 mutex_unlock(&ifmgd->mtx);
1658 case RX_MGMT_CFG80211_DEAUTH:
1659 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1661 case RX_MGMT_CFG80211_DISASSOC:
1662 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1665 WARN(1, "unexpected: %d", rma);
1670 mutex_unlock(&ifmgd->mtx);
1672 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
1673 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
1674 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1680 static void ieee80211_sta_timer(unsigned long data)
1682 struct ieee80211_sub_if_data *sdata =
1683 (struct ieee80211_sub_if_data *) data;
1684 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1685 struct ieee80211_local *local = sdata->local;
1687 if (local->quiescing) {
1688 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1692 ieee80211_queue_work(&local->hw, &ifmgd->work);
1695 static void ieee80211_sta_work(struct work_struct *work)
1697 struct ieee80211_sub_if_data *sdata =
1698 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1699 struct ieee80211_local *local = sdata->local;
1700 struct ieee80211_if_managed *ifmgd;
1701 struct sk_buff *skb;
1703 if (!ieee80211_sdata_running(sdata))
1706 if (local->scanning)
1709 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1713 * ieee80211_queue_work() should have picked up most cases,
1714 * here we'll pick the the rest.
1716 if (WARN(local->suspended, "STA MLME work scheduled while "
1717 "going to suspend\n"))
1720 ifmgd = &sdata->u.mgd;
1722 /* first process frames to avoid timing out while a frame is pending */
1723 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1724 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1726 /* then process the rest of the work */
1727 mutex_lock(&ifmgd->mtx);
1729 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1730 IEEE80211_STA_CONNECTION_POLL) &&
1731 ifmgd->associated) {
1734 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1735 if (time_is_after_jiffies(ifmgd->probe_timeout))
1736 run_again(ifmgd, ifmgd->probe_timeout);
1738 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1739 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1740 printk(KERN_DEBUG "No probe response from AP %pM"
1741 " after %dms, try %d\n", bssid,
1742 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1743 ifmgd->probe_send_count);
1745 ieee80211_mgd_probe_ap_send(sdata);
1748 * We actually lost the connection ... or did we?
1751 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1752 IEEE80211_STA_BEACON_POLL);
1753 printk(KERN_DEBUG "No probe response from AP %pM"
1754 " after %dms, disconnecting.\n",
1755 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
1756 ieee80211_set_disassoc(sdata, true);
1757 ieee80211_recalc_idle(local);
1758 mutex_unlock(&ifmgd->mtx);
1760 * must be outside lock due to cfg80211,
1761 * but that's not a problem.
1763 ieee80211_send_deauth_disassoc(sdata, bssid,
1764 IEEE80211_STYPE_DEAUTH,
1765 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1767 mutex_lock(&ifmgd->mtx);
1771 mutex_unlock(&ifmgd->mtx);
1774 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1776 struct ieee80211_sub_if_data *sdata =
1777 (struct ieee80211_sub_if_data *) data;
1778 struct ieee80211_local *local = sdata->local;
1780 if (local->quiescing)
1783 ieee80211_queue_work(&sdata->local->hw,
1784 &sdata->u.mgd.beacon_connection_loss_work);
1787 static void ieee80211_sta_conn_mon_timer(unsigned long data)
1789 struct ieee80211_sub_if_data *sdata =
1790 (struct ieee80211_sub_if_data *) data;
1791 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1792 struct ieee80211_local *local = sdata->local;
1794 if (local->quiescing)
1797 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
1800 static void ieee80211_sta_monitor_work(struct work_struct *work)
1802 struct ieee80211_sub_if_data *sdata =
1803 container_of(work, struct ieee80211_sub_if_data,
1804 u.mgd.monitor_work);
1806 ieee80211_mgd_probe_ap(sdata, false);
1809 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1811 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1812 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1813 IEEE80211_STA_CONNECTION_POLL);
1815 /* let's probe the connection once */
1816 ieee80211_queue_work(&sdata->local->hw,
1817 &sdata->u.mgd.monitor_work);
1818 /* and do all the other regular work too */
1819 ieee80211_queue_work(&sdata->local->hw,
1820 &sdata->u.mgd.work);
1825 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1827 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1830 * we need to use atomic bitops for the running bits
1831 * only because both timers might fire at the same
1832 * time -- the code here is properly synchronised.
1835 cancel_work_sync(&ifmgd->work);
1836 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
1837 if (del_timer_sync(&ifmgd->timer))
1838 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1840 cancel_work_sync(&ifmgd->chswitch_work);
1841 if (del_timer_sync(&ifmgd->chswitch_timer))
1842 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1844 cancel_work_sync(&ifmgd->monitor_work);
1845 /* these will just be re-established on connection */
1846 del_timer_sync(&ifmgd->conn_mon_timer);
1847 del_timer_sync(&ifmgd->bcn_mon_timer);
1850 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1852 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1854 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1855 add_timer(&ifmgd->timer);
1856 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1857 add_timer(&ifmgd->chswitch_timer);
1861 /* interface setup */
1862 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1864 struct ieee80211_if_managed *ifmgd;
1866 ifmgd = &sdata->u.mgd;
1867 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1868 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
1869 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1870 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1871 ieee80211_beacon_connection_loss_work);
1872 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1873 (unsigned long) sdata);
1874 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1875 (unsigned long) sdata);
1876 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1877 (unsigned long) sdata);
1878 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1879 (unsigned long) sdata);
1880 skb_queue_head_init(&ifmgd->skb_queue);
1884 mutex_init(&ifmgd->mtx);
1886 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1887 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1889 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1892 /* scan finished notification */
1893 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1895 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1897 /* Restart STA timers */
1899 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1900 ieee80211_restart_sta_timer(sdata);
1904 int ieee80211_max_network_latency(struct notifier_block *nb,
1905 unsigned long data, void *dummy)
1907 s32 latency_usec = (s32) data;
1908 struct ieee80211_local *local =
1909 container_of(nb, struct ieee80211_local,
1910 network_latency_notifier);
1912 mutex_lock(&local->iflist_mtx);
1913 ieee80211_recalc_ps(local, latency_usec);
1914 mutex_unlock(&local->iflist_mtx);
1920 static enum work_done_result
1921 ieee80211_probe_auth_done(struct ieee80211_work *wk,
1922 struct sk_buff *skb)
1925 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1926 return WORK_DONE_DESTROY;
1929 if (wk->type == IEEE80211_WORK_AUTH) {
1930 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1931 return WORK_DONE_DESTROY;
1934 mutex_lock(&wk->sdata->u.mgd.mtx);
1935 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1936 mutex_unlock(&wk->sdata->u.mgd.mtx);
1938 wk->type = IEEE80211_WORK_AUTH;
1939 wk->probe_auth.tries = 0;
1940 return WORK_DONE_REQUEUE;
1943 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1944 struct cfg80211_auth_request *req)
1947 struct ieee80211_work *wk;
1950 if (req->local_state_change)
1951 return 0; /* no need to update mac80211 state */
1953 switch (req->auth_type) {
1954 case NL80211_AUTHTYPE_OPEN_SYSTEM:
1955 auth_alg = WLAN_AUTH_OPEN;
1957 case NL80211_AUTHTYPE_SHARED_KEY:
1958 auth_alg = WLAN_AUTH_SHARED_KEY;
1960 case NL80211_AUTHTYPE_FT:
1961 auth_alg = WLAN_AUTH_FT;
1963 case NL80211_AUTHTYPE_NETWORK_EAP:
1964 auth_alg = WLAN_AUTH_LEAP;
1970 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1974 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
1976 if (req->ie && req->ie_len) {
1977 memcpy(wk->ie, req->ie, req->ie_len);
1978 wk->ie_len = req->ie_len;
1981 if (req->key && req->key_len) {
1982 wk->probe_auth.key_len = req->key_len;
1983 wk->probe_auth.key_idx = req->key_idx;
1984 memcpy(wk->probe_auth.key, req->key, req->key_len);
1987 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
1988 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
1989 wk->probe_auth.ssid_len = ssid[1];
1991 wk->probe_auth.algorithm = auth_alg;
1992 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
1994 /* if we already have a probe, don't probe again */
1995 if (req->bss->proberesp_ies)
1996 wk->type = IEEE80211_WORK_AUTH;
1998 wk->type = IEEE80211_WORK_DIRECT_PROBE;
1999 wk->chan = req->bss->channel;
2001 wk->done = ieee80211_probe_auth_done;
2003 ieee80211_add_work(wk);
2007 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2008 struct sk_buff *skb)
2010 struct ieee80211_mgmt *mgmt;
2014 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2015 return WORK_DONE_DESTROY;
2018 mgmt = (void *)skb->data;
2019 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2021 if (status == WLAN_STATUS_SUCCESS) {
2022 mutex_lock(&wk->sdata->u.mgd.mtx);
2023 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2024 mutex_unlock(&wk->sdata->u.mgd.mtx);
2025 /* oops -- internal error -- send timeout for now */
2026 cfg80211_send_assoc_timeout(wk->sdata->dev,
2028 return WORK_DONE_DESTROY;
2030 mutex_unlock(&wk->sdata->u.mgd.mtx);
2033 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2034 return WORK_DONE_DESTROY;
2037 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2038 struct cfg80211_assoc_request *req)
2040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2041 struct ieee80211_bss *bss = (void *)req->bss->priv;
2042 struct ieee80211_work *wk;
2046 mutex_lock(&ifmgd->mtx);
2047 if (ifmgd->associated) {
2048 if (!req->prev_bssid ||
2049 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2052 * We are already associated and the request was not a
2053 * reassociation request from the current BSS, so
2056 mutex_unlock(&ifmgd->mtx);
2060 /* Trying to reassociate - clear previous association state */
2061 ieee80211_set_disassoc(sdata, true);
2063 mutex_unlock(&ifmgd->mtx);
2065 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2069 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2070 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2072 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2073 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2074 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2075 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2076 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2079 if (req->ie && req->ie_len) {
2080 memcpy(wk->ie, req->ie, req->ie_len);
2081 wk->ie_len = req->ie_len;
2085 wk->assoc.bss = req->bss;
2087 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2089 /* new association always uses requested smps mode */
2090 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2091 if (ifmgd->powersave)
2092 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2094 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2096 ifmgd->ap_smps = ifmgd->req_smps;
2098 wk->assoc.smps = ifmgd->ap_smps;
2100 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2101 * We still associate in non-HT mode (11a/b/g) if any one of these
2102 * ciphers is configured as pairwise.
2103 * We can set this to true for non-11n hardware, that'll be checked
2104 * separately along with the peer capabilities.
2106 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2107 wk->assoc.capability = req->bss->capability;
2108 wk->assoc.wmm_used = bss->wmm_used;
2109 wk->assoc.supp_rates = bss->supp_rates;
2110 wk->assoc.supp_rates_len = bss->supp_rates_len;
2111 wk->assoc.ht_information_ie =
2112 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2114 if (bss->wmm_used && bss->uapsd_supported &&
2115 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2116 wk->assoc.uapsd_used = true;
2117 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2119 wk->assoc.uapsd_used = false;
2120 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2123 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2124 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2125 wk->assoc.ssid_len = ssid[1];
2127 if (req->prev_bssid)
2128 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2130 wk->type = IEEE80211_WORK_ASSOC;
2131 wk->chan = req->bss->channel;
2133 wk->done = ieee80211_assoc_done;
2136 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2137 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2139 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2140 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2143 if (req->crypto.control_port)
2144 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2146 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2148 ieee80211_add_work(wk);
2152 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2153 struct cfg80211_deauth_request *req,
2156 struct ieee80211_local *local = sdata->local;
2157 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2158 struct ieee80211_work *wk;
2159 const u8 *bssid = req->bss->bssid;
2161 mutex_lock(&ifmgd->mtx);
2163 if (ifmgd->associated == req->bss) {
2164 bssid = req->bss->bssid;
2165 ieee80211_set_disassoc(sdata, true);
2166 mutex_unlock(&ifmgd->mtx);
2168 bool not_auth_yet = false;
2170 mutex_unlock(&ifmgd->mtx);
2172 mutex_lock(&local->work_mtx);
2173 list_for_each_entry(wk, &local->work_list, list) {
2174 if (wk->sdata != sdata)
2177 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2178 wk->type != IEEE80211_WORK_AUTH)
2181 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2184 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2185 list_del_rcu(&wk->list);
2189 mutex_unlock(&local->work_mtx);
2192 * If somebody requests authentication and we haven't
2193 * sent out an auth frame yet there's no need to send
2194 * out a deauth frame either. If the state was PROBE,
2195 * then this is the case. If it's AUTH we have sent a
2196 * frame, and if it's IDLE we have completed the auth
2200 __cfg80211_auth_canceled(sdata->dev, bssid);
2205 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2206 sdata->name, bssid, req->reason_code);
2208 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2209 req->reason_code, cookie,
2210 !req->local_state_change);
2212 ieee80211_recalc_idle(sdata->local);
2217 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2218 struct cfg80211_disassoc_request *req,
2221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2224 mutex_lock(&ifmgd->mtx);
2227 * cfg80211 should catch this ... but it's racy since
2228 * we can receive a disassoc frame, process it, hand it
2229 * to cfg80211 while that's in a locked section already
2230 * trying to tell us that the user wants to disconnect.
2232 if (ifmgd->associated != req->bss) {
2233 mutex_unlock(&ifmgd->mtx);
2237 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2238 sdata->name, req->bss->bssid, req->reason_code);
2240 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2241 ieee80211_set_disassoc(sdata, false);
2243 mutex_unlock(&ifmgd->mtx);
2245 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2246 IEEE80211_STYPE_DISASSOC, req->reason_code,
2247 cookie, !req->local_state_change);
2248 sta_info_destroy_addr(sdata, bssid);
2250 ieee80211_recalc_idle(sdata->local);
2255 int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
2256 struct ieee80211_channel *chan,
2257 enum nl80211_channel_type channel_type,
2258 const u8 *buf, size_t len, u64 *cookie)
2260 struct ieee80211_local *local = sdata->local;
2261 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2262 struct sk_buff *skb;
2264 /* Check that we are on the requested channel for transmission */
2265 if ((chan != local->tmp_channel ||
2266 channel_type != local->tmp_channel_type) &&
2267 (chan != local->oper_channel ||
2268 channel_type != local->oper_channel_type))
2271 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2274 skb_reserve(skb, local->hw.extra_tx_headroom);
2276 memcpy(skb_put(skb, len), buf, len);
2278 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
2279 IEEE80211_SKB_CB(skb)->flags |=
2280 IEEE80211_TX_INTFL_DONT_ENCRYPT;
2281 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2282 IEEE80211_TX_CTL_REQ_TX_STATUS;
2283 skb->dev = sdata->dev;
2284 ieee80211_tx_skb(sdata, skb);
2286 *cookie = (unsigned long) skb;
2290 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2291 enum nl80211_cqm_rssi_threshold_event rssi_event,
2294 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2296 trace_api_cqm_rssi_notify(sdata, rssi_event);
2298 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2300 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);