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;
140 enum nl80211_channel_type prev_chantype;
141 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
143 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
145 prev_chantype = sdata->vif.bss_conf.channel_type;
147 /* HT is not supported */
148 if (!sband->ht_cap.ht_supported)
151 /* check that channel matches the right operating channel */
152 if (local->hw.conf.channel->center_freq !=
153 ieee80211_channel_to_frequency(hti->control_chan))
157 channel_type = NL80211_CHAN_HT20;
159 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
160 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
161 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
162 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
163 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
164 if (!(local->hw.conf.channel->flags &
165 IEEE80211_CHAN_NO_HT40PLUS))
166 channel_type = NL80211_CHAN_HT40PLUS;
168 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
169 if (!(local->hw.conf.channel->flags &
170 IEEE80211_CHAN_NO_HT40MINUS))
171 channel_type = NL80211_CHAN_HT40MINUS;
177 if (local->tmp_channel)
178 local->tmp_channel_type = channel_type;
180 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
181 /* can only fail due to HT40+/- mismatch */
182 channel_type = NL80211_CHAN_HT20;
183 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
186 /* channel_type change automatically detected */
187 ieee80211_hw_config(local, 0);
189 if (prev_chantype != channel_type) {
191 sta = sta_info_get(sdata, bssid);
193 rate_control_rate_update(local, sband, sta,
194 IEEE80211_RC_HT_CHANGED,
199 ht_opmode = le16_to_cpu(hti->operation_mode);
201 /* if bss configuration changed store the new one */
202 if (sdata->ht_opmode_valid != enable_ht ||
203 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
204 prev_chantype != channel_type) {
205 changed |= BSS_CHANGED_HT;
206 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
207 sdata->ht_opmode_valid = enable_ht;
213 /* frame sending functions */
215 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
216 const u8 *bssid, u16 stype, u16 reason,
217 void *cookie, bool send_frame)
219 struct ieee80211_local *local = sdata->local;
220 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
222 struct ieee80211_mgmt *mgmt;
224 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
226 printk(KERN_DEBUG "%s: failed to allocate buffer for "
227 "deauth/disassoc frame\n", sdata->name);
230 skb_reserve(skb, local->hw.extra_tx_headroom);
232 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
234 memcpy(mgmt->da, bssid, ETH_ALEN);
235 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
236 memcpy(mgmt->bssid, bssid, ETH_ALEN);
237 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
239 /* u.deauth.reason_code == u.disassoc.reason_code */
240 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
242 if (stype == IEEE80211_STYPE_DEAUTH)
244 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
246 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
249 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
251 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
252 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
253 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
256 ieee80211_tx_skb(sdata, skb);
261 void ieee80211_send_pspoll(struct ieee80211_local *local,
262 struct ieee80211_sub_if_data *sdata)
264 struct ieee80211_pspoll *pspoll;
267 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
271 pspoll = (struct ieee80211_pspoll *) skb->data;
272 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
274 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
275 ieee80211_tx_skb(sdata, skb);
278 void ieee80211_send_nullfunc(struct ieee80211_local *local,
279 struct ieee80211_sub_if_data *sdata,
283 struct ieee80211_hdr_3addr *nullfunc;
285 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
289 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
291 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
293 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
294 ieee80211_tx_skb(sdata, skb);
297 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
298 struct ieee80211_sub_if_data *sdata)
301 struct ieee80211_hdr *nullfunc;
304 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
307 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
309 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
310 "nullfunc frame\n", sdata->name);
313 skb_reserve(skb, local->hw.extra_tx_headroom);
315 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
316 memset(nullfunc, 0, 30);
317 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
318 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
319 nullfunc->frame_control = fc;
320 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
321 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
322 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
323 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
325 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
326 ieee80211_tx_skb(sdata, skb);
329 /* spectrum management related things */
330 static void ieee80211_chswitch_work(struct work_struct *work)
332 struct ieee80211_sub_if_data *sdata =
333 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
334 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
336 if (!ieee80211_sdata_running(sdata))
339 mutex_lock(&ifmgd->mtx);
340 if (!ifmgd->associated)
343 sdata->local->oper_channel = sdata->local->csa_channel;
344 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
346 /* XXX: shouldn't really modify cfg80211-owned data! */
347 ifmgd->associated->channel = sdata->local->oper_channel;
349 ieee80211_wake_queues_by_reason(&sdata->local->hw,
350 IEEE80211_QUEUE_STOP_REASON_CSA);
352 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
353 mutex_unlock(&ifmgd->mtx);
356 static void ieee80211_chswitch_timer(unsigned long data)
358 struct ieee80211_sub_if_data *sdata =
359 (struct ieee80211_sub_if_data *) data;
360 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
362 if (sdata->local->quiescing) {
363 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
367 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
370 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
371 struct ieee80211_channel_sw_ie *sw_elem,
372 struct ieee80211_bss *bss)
374 struct cfg80211_bss *cbss =
375 container_of((void *)bss, struct cfg80211_bss, priv);
376 struct ieee80211_channel *new_ch;
377 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
378 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
380 ASSERT_MGD_MTX(ifmgd);
382 if (!ifmgd->associated)
385 if (sdata->local->scanning)
388 /* Disregard subsequent beacons if we are already running a timer
391 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
394 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
395 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
398 sdata->local->csa_channel = new_ch;
400 if (sw_elem->count <= 1) {
401 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
403 ieee80211_stop_queues_by_reason(&sdata->local->hw,
404 IEEE80211_QUEUE_STOP_REASON_CSA);
405 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
406 mod_timer(&ifmgd->chswitch_timer,
408 msecs_to_jiffies(sw_elem->count *
409 cbss->beacon_interval));
413 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
414 u16 capab_info, u8 *pwr_constr_elem,
415 u8 pwr_constr_elem_len)
417 struct ieee80211_conf *conf = &sdata->local->hw.conf;
419 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
422 /* Power constraint IE length should be 1 octet */
423 if (pwr_constr_elem_len != 1)
426 if ((*pwr_constr_elem <= conf->channel->max_power) &&
427 (*pwr_constr_elem != sdata->local->power_constr_level)) {
428 sdata->local->power_constr_level = *pwr_constr_elem;
429 ieee80211_hw_config(sdata->local, 0);
434 static void ieee80211_enable_ps(struct ieee80211_local *local,
435 struct ieee80211_sub_if_data *sdata)
437 struct ieee80211_conf *conf = &local->hw.conf;
440 * If we are scanning right now then the parameters will
441 * take effect when scan finishes.
446 if (conf->dynamic_ps_timeout > 0 &&
447 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
448 mod_timer(&local->dynamic_ps_timer, jiffies +
449 msecs_to_jiffies(conf->dynamic_ps_timeout));
451 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
452 ieee80211_send_nullfunc(local, sdata, 1);
454 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
455 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
458 conf->flags |= IEEE80211_CONF_PS;
459 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
463 static void ieee80211_change_ps(struct ieee80211_local *local)
465 struct ieee80211_conf *conf = &local->hw.conf;
467 if (local->ps_sdata) {
468 ieee80211_enable_ps(local, local->ps_sdata);
469 } else if (conf->flags & IEEE80211_CONF_PS) {
470 conf->flags &= ~IEEE80211_CONF_PS;
471 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
472 del_timer_sync(&local->dynamic_ps_timer);
473 cancel_work_sync(&local->dynamic_ps_enable_work);
477 /* need to hold RTNL or interface lock */
478 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
480 struct ieee80211_sub_if_data *sdata, *found = NULL;
484 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
485 local->ps_sdata = NULL;
489 if (!list_empty(&local->work_list)) {
490 local->ps_sdata = NULL;
494 list_for_each_entry(sdata, &local->interfaces, list) {
495 if (!ieee80211_sdata_running(sdata))
497 if (sdata->vif.type != NL80211_IFTYPE_STATION)
503 if (count == 1 && found->u.mgd.powersave &&
504 found->u.mgd.associated &&
505 found->u.mgd.associated->beacon_ies &&
506 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
507 IEEE80211_STA_CONNECTION_POLL))) {
511 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
513 beaconint_us = ieee80211_tu_to_usec(
514 found->vif.bss_conf.beacon_int);
516 timeout = local->hw.conf.dynamic_ps_forced_timeout;
519 * The 2 second value is there for compatibility until
520 * the PM_QOS_NETWORK_LATENCY is configured with real
523 if (latency == 2000000000)
525 else if (latency <= 50000)
527 else if (latency <= 100000)
529 else if (latency <= 500000)
534 local->hw.conf.dynamic_ps_timeout = timeout;
536 if (beaconint_us > latency) {
537 local->ps_sdata = NULL;
539 struct ieee80211_bss *bss;
543 bss = (void *)found->u.mgd.associated->priv;
544 dtimper = bss->dtim_period;
546 /* If the TIM IE is invalid, pretend the value is 1 */
549 else if (dtimper > 1)
550 maxslp = min_t(int, dtimper,
551 latency / beaconint_us);
553 local->hw.conf.max_sleep_period = maxslp;
554 local->hw.conf.ps_dtim_period = dtimper;
555 local->ps_sdata = found;
558 local->ps_sdata = NULL;
562 ieee80211_change_ps(local);
565 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
567 struct ieee80211_local *local =
568 container_of(work, struct ieee80211_local,
569 dynamic_ps_disable_work);
571 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
572 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
573 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
576 ieee80211_wake_queues_by_reason(&local->hw,
577 IEEE80211_QUEUE_STOP_REASON_PS);
580 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
582 struct ieee80211_local *local =
583 container_of(work, struct ieee80211_local,
584 dynamic_ps_enable_work);
585 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
588 /* can only happen when PS was just disabled anyway */
592 if (local->hw.conf.flags & IEEE80211_CONF_PS)
595 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
596 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
597 ieee80211_send_nullfunc(local, sdata, 1);
599 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
600 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
601 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
602 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
603 local->hw.conf.flags |= IEEE80211_CONF_PS;
604 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
608 void ieee80211_dynamic_ps_timer(unsigned long data)
610 struct ieee80211_local *local = (void *) data;
612 if (local->quiescing || local->suspended)
615 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
619 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
620 struct ieee80211_if_managed *ifmgd,
621 u8 *wmm_param, size_t wmm_param_len)
623 struct ieee80211_tx_queue_params params;
626 u8 *pos, uapsd_queues = 0;
628 if (!local->ops->conf_tx)
631 if (local->hw.queues < 4)
637 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
640 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
641 uapsd_queues = local->uapsd_queues;
643 count = wmm_param[6] & 0x0f;
644 if (count == ifmgd->wmm_last_param_set)
646 ifmgd->wmm_last_param_set = count;
649 left = wmm_param_len - 8;
651 memset(¶ms, 0, sizeof(params));
654 for (; left >= 4; left -= 4, pos += 4) {
655 int aci = (pos[0] >> 5) & 0x03;
656 int acm = (pos[0] >> 4) & 0x01;
664 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
665 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
671 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
672 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
678 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
679 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
686 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
687 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
692 params.aifs = pos[0] & 0x0f;
693 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
694 params.cw_min = ecw2cw(pos[1] & 0x0f);
695 params.txop = get_unaligned_le16(pos + 2);
696 params.uapsd = uapsd;
698 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
699 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
700 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
701 wiphy_name(local->hw.wiphy), queue, aci, acm,
702 params.aifs, params.cw_min, params.cw_max, params.txop,
705 if (drv_conf_tx(local, queue, ¶ms))
706 printk(KERN_DEBUG "%s: failed to set TX queue "
707 "parameters for queue %d\n",
708 wiphy_name(local->hw.wiphy), queue);
711 /* enable WMM or activate new settings */
712 local->hw.conf.flags |= IEEE80211_CONF_QOS;
713 drv_config(local, IEEE80211_CONF_CHANGE_QOS);
716 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
717 u16 capab, bool erp_valid, u8 erp)
719 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
722 bool use_short_preamble;
726 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
727 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
729 use_protection = false;
730 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
733 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
734 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
735 use_short_slot = true;
737 if (use_protection != bss_conf->use_cts_prot) {
738 bss_conf->use_cts_prot = use_protection;
739 changed |= BSS_CHANGED_ERP_CTS_PROT;
742 if (use_short_preamble != bss_conf->use_short_preamble) {
743 bss_conf->use_short_preamble = use_short_preamble;
744 changed |= BSS_CHANGED_ERP_PREAMBLE;
747 if (use_short_slot != bss_conf->use_short_slot) {
748 bss_conf->use_short_slot = use_short_slot;
749 changed |= BSS_CHANGED_ERP_SLOT;
755 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
756 struct cfg80211_bss *cbss,
757 u32 bss_info_changed)
759 struct ieee80211_bss *bss = (void *)cbss->priv;
760 struct ieee80211_local *local = sdata->local;
762 bss_info_changed |= BSS_CHANGED_ASSOC;
763 /* set timing information */
764 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
765 sdata->vif.bss_conf.timestamp = cbss->tsf;
767 bss_info_changed |= BSS_CHANGED_BEACON_INT;
768 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
769 cbss->capability, bss->has_erp_value, bss->erp_value);
771 sdata->u.mgd.associated = cbss;
772 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
774 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
776 /* just to be sure */
777 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
778 IEEE80211_STA_BEACON_POLL);
781 * Always handle WMM once after association regardless
782 * of the first value the AP uses. Setting -1 here has
783 * that effect because the AP values is an unsigned
786 sdata->u.mgd.wmm_last_param_set = -1;
788 ieee80211_led_assoc(local, 1);
790 sdata->vif.bss_conf.assoc = 1;
792 * For now just always ask the driver to update the basic rateset
793 * when we have associated, we aren't checking whether it actually
796 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
798 /* And the BSSID changed - we're associated now */
799 bss_info_changed |= BSS_CHANGED_BSSID;
801 /* Tell the driver to monitor connection quality (if supported) */
802 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
803 sdata->vif.bss_conf.cqm_rssi_thold)
804 bss_info_changed |= BSS_CHANGED_CQM;
806 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
808 mutex_lock(&local->iflist_mtx);
809 ieee80211_recalc_ps(local, -1);
810 ieee80211_recalc_smps(local, sdata);
811 mutex_unlock(&local->iflist_mtx);
813 netif_tx_start_all_queues(sdata->dev);
814 netif_carrier_on(sdata->dev);
817 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
821 struct ieee80211_local *local = sdata->local;
822 struct sta_info *sta;
823 u32 changed = 0, config_changed = 0;
826 ASSERT_MGD_MTX(ifmgd);
828 if (WARN_ON(!ifmgd->associated))
831 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
833 ifmgd->associated = NULL;
834 memset(ifmgd->bssid, 0, ETH_ALEN);
837 * we need to commit the associated = NULL change because the
838 * scan code uses that to determine whether this iface should
839 * go to/wake up from powersave or not -- and could otherwise
840 * wake the queues erroneously.
845 * Thus, we can only afterwards stop the queues -- to account
846 * for the case where another CPU is finishing a scan at this
847 * time -- we don't want the scan code to enable queues.
850 netif_tx_stop_all_queues(sdata->dev);
851 netif_carrier_off(sdata->dev);
854 sta = sta_info_get(sdata, bssid);
856 set_sta_flags(sta, WLAN_STA_DISASSOC);
857 ieee80211_sta_tear_down_BA_sessions(sta);
861 changed |= ieee80211_reset_erp_info(sdata);
863 ieee80211_led_assoc(local, 0);
864 changed |= BSS_CHANGED_ASSOC;
865 sdata->vif.bss_conf.assoc = false;
867 ieee80211_set_wmm_default(sdata);
869 /* channel(_type) changes are handled by ieee80211_hw_config */
870 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
872 /* on the next assoc, re-program HT parameters */
873 sdata->ht_opmode_valid = false;
875 local->power_constr_level = 0;
877 del_timer_sync(&local->dynamic_ps_timer);
878 cancel_work_sync(&local->dynamic_ps_enable_work);
880 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
881 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
882 config_changed |= IEEE80211_CONF_CHANGE_PS;
885 ieee80211_hw_config(local, config_changed);
887 /* The BSSID (not really interesting) and HT changed */
888 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
889 ieee80211_bss_info_change_notify(sdata, changed);
892 sta_info_destroy_addr(sdata, bssid);
895 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
896 struct ieee80211_hdr *hdr)
899 * We can postpone the mgd.timer whenever receiving unicast frames
900 * from AP because we know that the connection is working both ways
901 * at that time. But multicast frames (and hence also beacons) must
902 * be ignored here, because we need to trigger the timer during
903 * data idle periods for sending the periodic probe request to the
904 * AP we're connected to.
906 if (is_multicast_ether_addr(hdr->addr1))
909 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
912 mod_timer(&sdata->u.mgd.conn_mon_timer,
913 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
916 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
921 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
922 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
923 ssid + 2, ssid[1], NULL, 0);
925 ifmgd->probe_send_count++;
926 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
927 run_again(ifmgd, ifmgd->probe_timeout);
930 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
934 bool already = false;
936 if (!ieee80211_sdata_running(sdata))
939 if (sdata->local->scanning)
942 if (sdata->local->tmp_channel)
945 mutex_lock(&ifmgd->mtx);
947 if (!ifmgd->associated)
950 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
951 if (beacon && net_ratelimit())
952 printk(KERN_DEBUG "%s: detected beacon loss from AP "
953 "- sending probe request\n", sdata->name);
957 * The driver/our work has already reported this event or the
958 * connection monitoring has kicked in and we have already sent
959 * a probe request. Or maybe the AP died and the driver keeps
960 * reporting until we disassociate...
962 * In either case we have to ignore the current call to this
963 * function (except for setting the correct probe reason bit)
964 * because otherwise we would reset the timer every time and
965 * never check whether we received a probe response!
967 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
968 IEEE80211_STA_CONNECTION_POLL))
972 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
974 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
979 mutex_lock(&sdata->local->iflist_mtx);
980 ieee80211_recalc_ps(sdata->local, -1);
981 mutex_unlock(&sdata->local->iflist_mtx);
983 ifmgd->probe_send_count = 0;
984 ieee80211_mgd_probe_ap_send(sdata);
986 mutex_unlock(&ifmgd->mtx);
989 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
992 struct ieee80211_local *local = sdata->local;
995 mutex_lock(&ifmgd->mtx);
996 if (!ifmgd->associated) {
997 mutex_unlock(&ifmgd->mtx);
1001 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1003 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1005 ieee80211_set_disassoc(sdata, true);
1006 ieee80211_recalc_idle(local);
1007 mutex_unlock(&ifmgd->mtx);
1009 * must be outside lock due to cfg80211,
1010 * but that's not a problem.
1012 ieee80211_send_deauth_disassoc(sdata, bssid,
1013 IEEE80211_STYPE_DEAUTH,
1014 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1018 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1020 struct ieee80211_sub_if_data *sdata =
1021 container_of(work, struct ieee80211_sub_if_data,
1022 u.mgd.beacon_connection_loss_work);
1024 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1025 __ieee80211_connection_loss(sdata);
1027 ieee80211_mgd_probe_ap(sdata, true);
1030 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1032 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1033 struct ieee80211_hw *hw = &sdata->local->hw;
1035 trace_api_beacon_loss(sdata);
1037 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1038 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1040 EXPORT_SYMBOL(ieee80211_beacon_loss);
1042 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1044 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1045 struct ieee80211_hw *hw = &sdata->local->hw;
1047 trace_api_connection_loss(sdata);
1049 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1050 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1052 EXPORT_SYMBOL(ieee80211_connection_loss);
1055 static enum rx_mgmt_action __must_check
1056 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1057 struct ieee80211_mgmt *mgmt, size_t len)
1059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1060 const u8 *bssid = NULL;
1064 return RX_MGMT_NONE;
1066 ASSERT_MGD_MTX(ifmgd);
1068 bssid = ifmgd->associated->bssid;
1070 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1072 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1073 sdata->name, bssid, reason_code);
1075 ieee80211_set_disassoc(sdata, true);
1076 ieee80211_recalc_idle(sdata->local);
1078 return RX_MGMT_CFG80211_DEAUTH;
1082 static enum rx_mgmt_action __must_check
1083 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1084 struct ieee80211_mgmt *mgmt, size_t len)
1086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1090 return RX_MGMT_NONE;
1092 ASSERT_MGD_MTX(ifmgd);
1094 if (WARN_ON(!ifmgd->associated))
1095 return RX_MGMT_NONE;
1097 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1098 return RX_MGMT_NONE;
1100 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1102 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1103 sdata->name, mgmt->sa, reason_code);
1105 ieee80211_set_disassoc(sdata, true);
1106 ieee80211_recalc_idle(sdata->local);
1107 return RX_MGMT_CFG80211_DISASSOC;
1111 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1112 struct ieee80211_mgmt *mgmt, size_t len)
1114 struct ieee80211_sub_if_data *sdata = wk->sdata;
1115 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1116 struct ieee80211_local *local = sdata->local;
1117 struct ieee80211_supported_band *sband;
1118 struct sta_info *sta;
1119 struct cfg80211_bss *cbss = wk->assoc.bss;
1121 u32 rates, basic_rates;
1122 u16 capab_info, aid;
1123 struct ieee802_11_elems elems;
1124 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1127 bool have_higher_than_11mbit = false;
1128 u16 ap_ht_cap_flags;
1130 /* AssocResp and ReassocResp have identical structure */
1132 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1133 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1135 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1136 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1137 "set\n", sdata->name, aid);
1138 aid &= ~(BIT(15) | BIT(14));
1140 pos = mgmt->u.assoc_resp.variable;
1141 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1143 if (!elems.supp_rates) {
1144 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1151 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
1153 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1154 " the AP\n", sdata->name);
1158 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1160 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1161 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1165 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1167 for (i = 0; i < elems.supp_rates_len; i++) {
1168 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1169 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1172 have_higher_than_11mbit = true;
1174 for (j = 0; j < sband->n_bitrates; j++) {
1175 if (sband->bitrates[j].bitrate == rate) {
1178 basic_rates |= BIT(j);
1184 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1185 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1186 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1189 have_higher_than_11mbit = true;
1191 for (j = 0; j < sband->n_bitrates; j++) {
1192 if (sband->bitrates[j].bitrate == rate) {
1195 basic_rates |= BIT(j);
1201 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1202 sdata->vif.bss_conf.basic_rates = basic_rates;
1204 /* cf. IEEE 802.11 9.2.12 */
1205 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1206 have_higher_than_11mbit)
1207 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1209 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1211 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1212 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1213 elems.ht_cap_elem, &sta->sta.ht_cap);
1215 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1217 rate_control_rate_init(sta);
1219 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1220 set_sta_flags(sta, WLAN_STA_MFP);
1222 if (elems.wmm_param)
1223 set_sta_flags(sta, WLAN_STA_WME);
1225 err = sta_info_insert(sta);
1228 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1229 " the AP (error %d)\n", sdata->name, err);
1233 if (elems.wmm_param)
1234 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1235 elems.wmm_param_len);
1237 ieee80211_set_wmm_default(sdata);
1239 local->oper_channel = wk->chan;
1241 if (elems.ht_info_elem && elems.wmm_param &&
1242 (sdata->local->hw.queues >= 4) &&
1243 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1244 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1245 cbss->bssid, ap_ht_cap_flags);
1247 /* set AID and assoc capability,
1248 * ieee80211_set_associated() will tell the driver */
1249 bss_conf->aid = aid;
1250 bss_conf->assoc_capability = capab_info;
1251 ieee80211_set_associated(sdata, cbss, changed);
1254 * If we're using 4-addr mode, let the AP know that we're
1255 * doing so, so that it can create the STA VLAN on its side
1257 if (ifmgd->use_4addr)
1258 ieee80211_send_4addr_nullfunc(local, sdata);
1261 * Start timer to probe the connection to the AP now.
1262 * Also start the timer that will detect beacon loss.
1264 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1265 mod_beacon_timer(sdata);
1271 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1272 struct ieee80211_mgmt *mgmt,
1274 struct ieee80211_rx_status *rx_status,
1275 struct ieee802_11_elems *elems,
1278 struct ieee80211_local *local = sdata->local;
1280 struct ieee80211_bss *bss;
1281 struct ieee80211_channel *channel;
1282 bool need_ps = false;
1284 if (sdata->u.mgd.associated) {
1285 bss = (void *)sdata->u.mgd.associated->priv;
1286 /* not previously set so we may need to recalc */
1287 need_ps = !bss->dtim_period;
1290 if (elems->ds_params && elems->ds_params_len == 1)
1291 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1293 freq = rx_status->freq;
1295 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1297 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1300 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1303 ieee80211_rx_bss_put(local, bss);
1305 if (!sdata->u.mgd.associated)
1309 mutex_lock(&local->iflist_mtx);
1310 ieee80211_recalc_ps(local, -1);
1311 mutex_unlock(&local->iflist_mtx);
1314 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1315 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1317 struct ieee80211_channel_sw_ie *sw_elem =
1318 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1319 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1324 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1325 struct sk_buff *skb)
1327 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1328 struct ieee80211_if_managed *ifmgd;
1329 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1330 size_t baselen, len = skb->len;
1331 struct ieee802_11_elems elems;
1333 ifmgd = &sdata->u.mgd;
1335 ASSERT_MGD_MTX(ifmgd);
1337 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1338 return; /* ignore ProbeResp to foreign address */
1340 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1344 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1347 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1349 if (ifmgd->associated &&
1350 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
1351 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1352 IEEE80211_STA_CONNECTION_POLL)) {
1353 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1354 IEEE80211_STA_BEACON_POLL);
1355 mutex_lock(&sdata->local->iflist_mtx);
1356 ieee80211_recalc_ps(sdata->local, -1);
1357 mutex_unlock(&sdata->local->iflist_mtx);
1359 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1363 * We've received a probe response, but are not sure whether
1364 * we have or will be receiving any beacons or data, so let's
1365 * schedule the timers again, just in case.
1367 mod_beacon_timer(sdata);
1369 mod_timer(&ifmgd->conn_mon_timer,
1370 round_jiffies_up(jiffies +
1371 IEEE80211_CONNECTION_IDLE_TIME));
1376 * This is the canonical list of information elements we care about,
1377 * the filter code also gives us all changes to the Microsoft OUI
1378 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1380 * We implement beacon filtering in software since that means we can
1381 * avoid processing the frame here and in cfg80211, and userspace
1382 * will not be able to tell whether the hardware supports it or not.
1384 * XXX: This list needs to be dynamic -- userspace needs to be able to
1385 * add items it requires. It also needs to be able to tell us to
1386 * look out for other vendor IEs.
1388 static const u64 care_about_ies =
1389 (1ULL << WLAN_EID_COUNTRY) |
1390 (1ULL << WLAN_EID_ERP_INFO) |
1391 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1392 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1393 (1ULL << WLAN_EID_HT_CAPABILITY) |
1394 (1ULL << WLAN_EID_HT_INFORMATION);
1396 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1397 struct ieee80211_mgmt *mgmt,
1399 struct ieee80211_rx_status *rx_status)
1401 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1402 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1404 struct ieee802_11_elems elems;
1405 struct ieee80211_local *local = sdata->local;
1407 bool erp_valid, directed_tim = false;
1412 ASSERT_MGD_MTX(ifmgd);
1414 /* Process beacon from the current BSS */
1415 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1419 if (rx_status->freq != local->hw.conf.channel->center_freq)
1423 * We might have received a number of frames, among them a
1424 * disassoc frame and a beacon...
1426 if (!ifmgd->associated)
1429 bssid = ifmgd->associated->bssid;
1432 * And in theory even frames from a different AP we were just
1433 * associated to a split-second ago!
1435 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1438 /* Track average RSSI from the Beacon frames of the current AP */
1439 ifmgd->last_beacon_signal = rx_status->signal;
1440 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1441 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1442 ifmgd->ave_beacon_signal = rx_status->signal;
1443 ifmgd->last_cqm_event_signal = 0;
1445 ifmgd->ave_beacon_signal =
1446 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1447 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1448 ifmgd->ave_beacon_signal) / 16;
1450 if (bss_conf->cqm_rssi_thold &&
1451 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1452 int sig = ifmgd->ave_beacon_signal / 16;
1453 int last_event = ifmgd->last_cqm_event_signal;
1454 int thold = bss_conf->cqm_rssi_thold;
1455 int hyst = bss_conf->cqm_rssi_hyst;
1457 (last_event == 0 || sig < last_event - hyst)) {
1458 ifmgd->last_cqm_event_signal = sig;
1459 ieee80211_cqm_rssi_notify(
1461 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1463 } else if (sig > thold &&
1464 (last_event == 0 || sig > last_event + hyst)) {
1465 ifmgd->last_cqm_event_signal = sig;
1466 ieee80211_cqm_rssi_notify(
1468 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1473 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1474 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1475 if (net_ratelimit()) {
1476 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1477 "to a received beacon\n", sdata->name);
1480 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1481 mutex_lock(&local->iflist_mtx);
1482 ieee80211_recalc_ps(local, -1);
1483 mutex_unlock(&local->iflist_mtx);
1487 * Push the beacon loss detection into the future since
1488 * we are processing a beacon from the AP just now.
1490 mod_beacon_timer(sdata);
1492 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1493 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1494 len - baselen, &elems,
1495 care_about_ies, ncrc);
1497 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1498 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1501 if (ncrc != ifmgd->beacon_crc) {
1502 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1505 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1506 elems.wmm_param_len);
1509 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1511 if (local->hw.conf.dynamic_ps_timeout > 0) {
1512 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1513 ieee80211_hw_config(local,
1514 IEEE80211_CONF_CHANGE_PS);
1515 ieee80211_send_nullfunc(local, sdata, 0);
1517 local->pspolling = true;
1520 * Here is assumed that the driver will be
1521 * able to send ps-poll frame and receive a
1522 * response even though power save mode is
1523 * enabled, but some drivers might require
1524 * to disable power save here. This needs
1525 * to be investigated.
1527 ieee80211_send_pspoll(local, sdata);
1532 if (ncrc == ifmgd->beacon_crc)
1534 ifmgd->beacon_crc = ncrc;
1536 if (elems.erp_info && elems.erp_info_len >= 1) {
1538 erp_value = elems.erp_info[0];
1542 changed |= ieee80211_handle_bss_capability(sdata,
1543 le16_to_cpu(mgmt->u.beacon.capab_info),
1544 erp_valid, erp_value);
1547 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1548 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1549 struct sta_info *sta;
1550 struct ieee80211_supported_band *sband;
1551 u16 ap_ht_cap_flags;
1555 sta = sta_info_get(sdata, bssid);
1556 if (WARN_ON(!sta)) {
1561 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1563 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1564 elems.ht_cap_elem, &sta->sta.ht_cap);
1566 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1570 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1571 bssid, ap_ht_cap_flags);
1574 /* Note: country IE parsing is done for us by cfg80211 */
1575 if (elems.country_elem) {
1576 /* TODO: IBSS also needs this */
1577 if (elems.pwr_constr_elem)
1578 ieee80211_handle_pwr_constr(sdata,
1579 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1580 elems.pwr_constr_elem,
1581 elems.pwr_constr_elem_len);
1584 ieee80211_bss_info_change_notify(sdata, changed);
1587 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1588 struct sk_buff *skb)
1590 struct ieee80211_local *local = sdata->local;
1591 struct ieee80211_mgmt *mgmt;
1595 return RX_DROP_MONITOR;
1597 mgmt = (struct ieee80211_mgmt *) skb->data;
1598 fc = le16_to_cpu(mgmt->frame_control);
1600 switch (fc & IEEE80211_FCTL_STYPE) {
1601 case IEEE80211_STYPE_PROBE_RESP:
1602 case IEEE80211_STYPE_BEACON:
1603 case IEEE80211_STYPE_DEAUTH:
1604 case IEEE80211_STYPE_DISASSOC:
1605 case IEEE80211_STYPE_ACTION:
1606 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1607 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1611 return RX_DROP_MONITOR;
1614 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1615 struct sk_buff *skb)
1617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1618 struct ieee80211_rx_status *rx_status;
1619 struct ieee80211_mgmt *mgmt;
1620 enum rx_mgmt_action rma = RX_MGMT_NONE;
1623 rx_status = (struct ieee80211_rx_status *) skb->cb;
1624 mgmt = (struct ieee80211_mgmt *) skb->data;
1625 fc = le16_to_cpu(mgmt->frame_control);
1627 mutex_lock(&ifmgd->mtx);
1629 if (ifmgd->associated &&
1630 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1631 switch (fc & IEEE80211_FCTL_STYPE) {
1632 case IEEE80211_STYPE_BEACON:
1633 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1636 case IEEE80211_STYPE_PROBE_RESP:
1637 ieee80211_rx_mgmt_probe_resp(sdata, skb);
1639 case IEEE80211_STYPE_DEAUTH:
1640 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1642 case IEEE80211_STYPE_DISASSOC:
1643 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1645 case IEEE80211_STYPE_ACTION:
1646 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1649 ieee80211_sta_process_chanswitch(sdata,
1650 &mgmt->u.action.u.chan_switch.sw_elem,
1651 (void *)ifmgd->associated->priv);
1654 mutex_unlock(&ifmgd->mtx);
1660 case RX_MGMT_CFG80211_DEAUTH:
1661 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1663 case RX_MGMT_CFG80211_DISASSOC:
1664 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1667 WARN(1, "unexpected: %d", rma);
1672 mutex_unlock(&ifmgd->mtx);
1674 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
1675 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
1676 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1682 static void ieee80211_sta_timer(unsigned long data)
1684 struct ieee80211_sub_if_data *sdata =
1685 (struct ieee80211_sub_if_data *) data;
1686 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1687 struct ieee80211_local *local = sdata->local;
1689 if (local->quiescing) {
1690 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1694 ieee80211_queue_work(&local->hw, &ifmgd->work);
1697 static void ieee80211_sta_work(struct work_struct *work)
1699 struct ieee80211_sub_if_data *sdata =
1700 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1701 struct ieee80211_local *local = sdata->local;
1702 struct ieee80211_if_managed *ifmgd;
1703 struct sk_buff *skb;
1705 if (!ieee80211_sdata_running(sdata))
1708 if (local->scanning)
1711 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1715 * ieee80211_queue_work() should have picked up most cases,
1716 * here we'll pick the the rest.
1718 if (WARN(local->suspended, "STA MLME work scheduled while "
1719 "going to suspend\n"))
1722 ifmgd = &sdata->u.mgd;
1724 /* first process frames to avoid timing out while a frame is pending */
1725 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1726 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1728 /* then process the rest of the work */
1729 mutex_lock(&ifmgd->mtx);
1731 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1732 IEEE80211_STA_CONNECTION_POLL) &&
1733 ifmgd->associated) {
1736 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1737 if (time_is_after_jiffies(ifmgd->probe_timeout))
1738 run_again(ifmgd, ifmgd->probe_timeout);
1740 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1741 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1742 printk(KERN_DEBUG "No probe response from AP %pM"
1743 " after %dms, try %d\n", bssid,
1744 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1745 ifmgd->probe_send_count);
1747 ieee80211_mgd_probe_ap_send(sdata);
1750 * We actually lost the connection ... or did we?
1753 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1754 IEEE80211_STA_BEACON_POLL);
1755 printk(KERN_DEBUG "No probe response from AP %pM"
1756 " after %dms, disconnecting.\n",
1757 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
1758 ieee80211_set_disassoc(sdata, true);
1759 ieee80211_recalc_idle(local);
1760 mutex_unlock(&ifmgd->mtx);
1762 * must be outside lock due to cfg80211,
1763 * but that's not a problem.
1765 ieee80211_send_deauth_disassoc(sdata, bssid,
1766 IEEE80211_STYPE_DEAUTH,
1767 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1769 mutex_lock(&ifmgd->mtx);
1773 mutex_unlock(&ifmgd->mtx);
1776 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1778 struct ieee80211_sub_if_data *sdata =
1779 (struct ieee80211_sub_if_data *) data;
1780 struct ieee80211_local *local = sdata->local;
1782 if (local->quiescing)
1785 ieee80211_queue_work(&sdata->local->hw,
1786 &sdata->u.mgd.beacon_connection_loss_work);
1789 static void ieee80211_sta_conn_mon_timer(unsigned long data)
1791 struct ieee80211_sub_if_data *sdata =
1792 (struct ieee80211_sub_if_data *) data;
1793 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1794 struct ieee80211_local *local = sdata->local;
1796 if (local->quiescing)
1799 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
1802 static void ieee80211_sta_monitor_work(struct work_struct *work)
1804 struct ieee80211_sub_if_data *sdata =
1805 container_of(work, struct ieee80211_sub_if_data,
1806 u.mgd.monitor_work);
1808 ieee80211_mgd_probe_ap(sdata, false);
1811 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1813 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1814 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1815 IEEE80211_STA_CONNECTION_POLL);
1817 /* let's probe the connection once */
1818 ieee80211_queue_work(&sdata->local->hw,
1819 &sdata->u.mgd.monitor_work);
1820 /* and do all the other regular work too */
1821 ieee80211_queue_work(&sdata->local->hw,
1822 &sdata->u.mgd.work);
1827 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1829 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1832 * we need to use atomic bitops for the running bits
1833 * only because both timers might fire at the same
1834 * time -- the code here is properly synchronised.
1837 cancel_work_sync(&ifmgd->work);
1838 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
1839 if (del_timer_sync(&ifmgd->timer))
1840 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1842 cancel_work_sync(&ifmgd->chswitch_work);
1843 if (del_timer_sync(&ifmgd->chswitch_timer))
1844 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1846 cancel_work_sync(&ifmgd->monitor_work);
1847 /* these will just be re-established on connection */
1848 del_timer_sync(&ifmgd->conn_mon_timer);
1849 del_timer_sync(&ifmgd->bcn_mon_timer);
1852 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1854 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1856 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1857 add_timer(&ifmgd->timer);
1858 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1859 add_timer(&ifmgd->chswitch_timer);
1863 /* interface setup */
1864 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1866 struct ieee80211_if_managed *ifmgd;
1868 ifmgd = &sdata->u.mgd;
1869 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1870 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
1871 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1872 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1873 ieee80211_beacon_connection_loss_work);
1874 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1875 (unsigned long) sdata);
1876 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1877 (unsigned long) sdata);
1878 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1879 (unsigned long) sdata);
1880 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1881 (unsigned long) sdata);
1882 skb_queue_head_init(&ifmgd->skb_queue);
1886 mutex_init(&ifmgd->mtx);
1888 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1889 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1891 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1894 /* scan finished notification */
1895 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1897 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1899 /* Restart STA timers */
1901 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1902 ieee80211_restart_sta_timer(sdata);
1906 int ieee80211_max_network_latency(struct notifier_block *nb,
1907 unsigned long data, void *dummy)
1909 s32 latency_usec = (s32) data;
1910 struct ieee80211_local *local =
1911 container_of(nb, struct ieee80211_local,
1912 network_latency_notifier);
1914 mutex_lock(&local->iflist_mtx);
1915 ieee80211_recalc_ps(local, latency_usec);
1916 mutex_unlock(&local->iflist_mtx);
1922 static enum work_done_result
1923 ieee80211_probe_auth_done(struct ieee80211_work *wk,
1924 struct sk_buff *skb)
1927 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1928 return WORK_DONE_DESTROY;
1931 if (wk->type == IEEE80211_WORK_AUTH) {
1932 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1933 return WORK_DONE_DESTROY;
1936 mutex_lock(&wk->sdata->u.mgd.mtx);
1937 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1938 mutex_unlock(&wk->sdata->u.mgd.mtx);
1940 wk->type = IEEE80211_WORK_AUTH;
1941 wk->probe_auth.tries = 0;
1942 return WORK_DONE_REQUEUE;
1945 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1946 struct cfg80211_auth_request *req)
1949 struct ieee80211_work *wk;
1952 if (req->local_state_change)
1953 return 0; /* no need to update mac80211 state */
1955 switch (req->auth_type) {
1956 case NL80211_AUTHTYPE_OPEN_SYSTEM:
1957 auth_alg = WLAN_AUTH_OPEN;
1959 case NL80211_AUTHTYPE_SHARED_KEY:
1960 auth_alg = WLAN_AUTH_SHARED_KEY;
1962 case NL80211_AUTHTYPE_FT:
1963 auth_alg = WLAN_AUTH_FT;
1965 case NL80211_AUTHTYPE_NETWORK_EAP:
1966 auth_alg = WLAN_AUTH_LEAP;
1972 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1976 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
1978 if (req->ie && req->ie_len) {
1979 memcpy(wk->ie, req->ie, req->ie_len);
1980 wk->ie_len = req->ie_len;
1983 if (req->key && req->key_len) {
1984 wk->probe_auth.key_len = req->key_len;
1985 wk->probe_auth.key_idx = req->key_idx;
1986 memcpy(wk->probe_auth.key, req->key, req->key_len);
1989 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
1990 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
1991 wk->probe_auth.ssid_len = ssid[1];
1993 wk->probe_auth.algorithm = auth_alg;
1994 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
1996 /* if we already have a probe, don't probe again */
1997 if (req->bss->proberesp_ies)
1998 wk->type = IEEE80211_WORK_AUTH;
2000 wk->type = IEEE80211_WORK_DIRECT_PROBE;
2001 wk->chan = req->bss->channel;
2003 wk->done = ieee80211_probe_auth_done;
2005 ieee80211_add_work(wk);
2009 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2010 struct sk_buff *skb)
2012 struct ieee80211_mgmt *mgmt;
2016 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2017 return WORK_DONE_DESTROY;
2020 mgmt = (void *)skb->data;
2021 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2023 if (status == WLAN_STATUS_SUCCESS) {
2024 mutex_lock(&wk->sdata->u.mgd.mtx);
2025 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2026 mutex_unlock(&wk->sdata->u.mgd.mtx);
2027 /* oops -- internal error -- send timeout for now */
2028 cfg80211_send_assoc_timeout(wk->sdata->dev,
2030 return WORK_DONE_DESTROY;
2032 mutex_unlock(&wk->sdata->u.mgd.mtx);
2035 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2036 return WORK_DONE_DESTROY;
2039 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2040 struct cfg80211_assoc_request *req)
2042 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2043 struct ieee80211_bss *bss = (void *)req->bss->priv;
2044 struct ieee80211_work *wk;
2048 mutex_lock(&ifmgd->mtx);
2049 if (ifmgd->associated) {
2050 if (!req->prev_bssid ||
2051 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2054 * We are already associated and the request was not a
2055 * reassociation request from the current BSS, so
2058 mutex_unlock(&ifmgd->mtx);
2062 /* Trying to reassociate - clear previous association state */
2063 ieee80211_set_disassoc(sdata, true);
2065 mutex_unlock(&ifmgd->mtx);
2067 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2071 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2072 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2074 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2075 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2076 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2077 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2078 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2081 if (req->ie && req->ie_len) {
2082 memcpy(wk->ie, req->ie, req->ie_len);
2083 wk->ie_len = req->ie_len;
2087 wk->assoc.bss = req->bss;
2089 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2091 /* new association always uses requested smps mode */
2092 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2093 if (ifmgd->powersave)
2094 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2096 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2098 ifmgd->ap_smps = ifmgd->req_smps;
2100 wk->assoc.smps = ifmgd->ap_smps;
2102 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2103 * We still associate in non-HT mode (11a/b/g) if any one of these
2104 * ciphers is configured as pairwise.
2105 * We can set this to true for non-11n hardware, that'll be checked
2106 * separately along with the peer capabilities.
2108 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2109 wk->assoc.capability = req->bss->capability;
2110 wk->assoc.wmm_used = bss->wmm_used;
2111 wk->assoc.supp_rates = bss->supp_rates;
2112 wk->assoc.supp_rates_len = bss->supp_rates_len;
2113 wk->assoc.ht_information_ie =
2114 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2116 if (bss->wmm_used && bss->uapsd_supported &&
2117 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2118 wk->assoc.uapsd_used = true;
2119 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2121 wk->assoc.uapsd_used = false;
2122 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2125 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2126 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2127 wk->assoc.ssid_len = ssid[1];
2129 if (req->prev_bssid)
2130 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2132 wk->type = IEEE80211_WORK_ASSOC;
2133 wk->chan = req->bss->channel;
2135 wk->done = ieee80211_assoc_done;
2138 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2139 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2141 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2142 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2145 if (req->crypto.control_port)
2146 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2148 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2150 ieee80211_add_work(wk);
2154 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2155 struct cfg80211_deauth_request *req,
2158 struct ieee80211_local *local = sdata->local;
2159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2160 struct ieee80211_work *wk;
2161 const u8 *bssid = req->bss->bssid;
2163 mutex_lock(&ifmgd->mtx);
2165 if (ifmgd->associated == req->bss) {
2166 bssid = req->bss->bssid;
2167 ieee80211_set_disassoc(sdata, true);
2168 mutex_unlock(&ifmgd->mtx);
2170 bool not_auth_yet = false;
2172 mutex_unlock(&ifmgd->mtx);
2174 mutex_lock(&local->work_mtx);
2175 list_for_each_entry(wk, &local->work_list, list) {
2176 if (wk->sdata != sdata)
2179 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2180 wk->type != IEEE80211_WORK_AUTH)
2183 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2186 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2187 list_del_rcu(&wk->list);
2191 mutex_unlock(&local->work_mtx);
2194 * If somebody requests authentication and we haven't
2195 * sent out an auth frame yet there's no need to send
2196 * out a deauth frame either. If the state was PROBE,
2197 * then this is the case. If it's AUTH we have sent a
2198 * frame, and if it's IDLE we have completed the auth
2202 __cfg80211_auth_canceled(sdata->dev, bssid);
2207 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2208 sdata->name, bssid, req->reason_code);
2210 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2211 req->reason_code, cookie,
2212 !req->local_state_change);
2214 ieee80211_recalc_idle(sdata->local);
2219 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2220 struct cfg80211_disassoc_request *req,
2223 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2226 mutex_lock(&ifmgd->mtx);
2229 * cfg80211 should catch this ... but it's racy since
2230 * we can receive a disassoc frame, process it, hand it
2231 * to cfg80211 while that's in a locked section already
2232 * trying to tell us that the user wants to disconnect.
2234 if (ifmgd->associated != req->bss) {
2235 mutex_unlock(&ifmgd->mtx);
2239 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2240 sdata->name, req->bss->bssid, req->reason_code);
2242 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2243 ieee80211_set_disassoc(sdata, false);
2245 mutex_unlock(&ifmgd->mtx);
2247 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2248 IEEE80211_STYPE_DISASSOC, req->reason_code,
2249 cookie, !req->local_state_change);
2250 sta_info_destroy_addr(sdata, bssid);
2252 ieee80211_recalc_idle(sdata->local);
2257 int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
2258 struct ieee80211_channel *chan,
2259 enum nl80211_channel_type channel_type,
2260 const u8 *buf, size_t len, u64 *cookie)
2262 struct ieee80211_local *local = sdata->local;
2263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2264 struct sk_buff *skb;
2266 /* Check that we are on the requested channel for transmission */
2267 if ((chan != local->tmp_channel ||
2268 channel_type != local->tmp_channel_type) &&
2269 (chan != local->oper_channel ||
2270 channel_type != local->_oper_channel_type))
2273 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2276 skb_reserve(skb, local->hw.extra_tx_headroom);
2278 memcpy(skb_put(skb, len), buf, len);
2280 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
2281 IEEE80211_SKB_CB(skb)->flags |=
2282 IEEE80211_TX_INTFL_DONT_ENCRYPT;
2283 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2284 IEEE80211_TX_CTL_REQ_TX_STATUS;
2285 skb->dev = sdata->dev;
2286 ieee80211_tx_skb(sdata, skb);
2288 *cookie = (unsigned long) skb;
2292 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2293 enum nl80211_cqm_rssi_threshold_event rssi_event,
2296 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2298 trace_api_cqm_rssi_notify(sdata, rssi_event);
2300 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2302 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);