2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/pm_qos_params.h>
21 #include <linux/crc32.h>
22 #include <linux/slab.h>
23 #include <net/mac80211.h>
24 #include <asm/unaligned.h>
26 #include "ieee80211_i.h"
27 #include "driver-ops.h"
31 #define IEEE80211_MAX_PROBE_TRIES 5
34 * beacon loss detection timeout
35 * XXX: should depend on beacon interval
37 #define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
39 * Time the connection can be idle before we probe
40 * it to see if we can still talk to the AP.
42 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
44 * Time we wait for a probe response after sending
45 * a probe request because of beacon loss or for
46 * checking the connection still works.
48 #define IEEE80211_PROBE_WAIT (HZ / 2)
51 * Weight given to the latest Beacon frame when calculating average signal
52 * strength for Beacon frames received in the current BSS. This must be
55 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
57 #define TMR_RUNNING_TIMER 0
58 #define TMR_RUNNING_CHANSW 1
61 * All cfg80211 functions have to be called outside a locked
62 * section so that they can acquire a lock themselves... This
63 * is much simpler than queuing up things in cfg80211, but we
64 * do need some indirection for that here.
67 /* no action required */
70 /* caller must call cfg80211_send_rx_auth() */
71 RX_MGMT_CFG80211_AUTH,
73 /* caller must call cfg80211_send_rx_assoc() */
74 RX_MGMT_CFG80211_ASSOC,
76 /* caller must call cfg80211_send_deauth() */
77 RX_MGMT_CFG80211_DEAUTH,
79 /* caller must call cfg80211_send_disassoc() */
80 RX_MGMT_CFG80211_DISASSOC,
82 /* caller must tell cfg80211 about internal error */
83 RX_MGMT_CFG80211_ASSOC_ERROR,
87 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
89 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
93 * We can have multiple work items (and connection probing)
94 * scheduling this timer, but we need to take care to only
95 * reschedule it when it should fire _earlier_ than it was
96 * asked for before, or if it's not pending right now. This
97 * function ensures that. Note that it then is required to
98 * run this function for all timeouts after the first one
99 * has happened -- the work that runs from this timer will
102 static void run_again(struct ieee80211_if_managed *ifmgd,
103 unsigned long timeout)
105 ASSERT_MGD_MTX(ifmgd);
107 if (!timer_pending(&ifmgd->timer) ||
108 time_before(timeout, ifmgd->timer.expires))
109 mod_timer(&ifmgd->timer, timeout);
112 static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
114 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
117 mod_timer(&sdata->u.mgd.bcn_mon_timer,
118 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
121 static int ecw2cw(int ecw)
123 return (1 << ecw) - 1;
127 * ieee80211_enable_ht should be called only after the operating band
128 * has been determined as ht configuration depends on the hw's
129 * HT abilities for a specific band.
131 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
132 struct ieee80211_ht_info *hti,
133 const u8 *bssid, u16 ap_ht_cap_flags)
135 struct ieee80211_local *local = sdata->local;
136 struct ieee80211_supported_band *sband;
137 struct sta_info *sta;
140 bool enable_ht = true;
141 enum nl80211_channel_type prev_chantype;
142 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
144 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
146 prev_chantype = sdata->vif.bss_conf.channel_type;
148 /* HT is not supported */
149 if (!sband->ht_cap.ht_supported)
152 /* check that channel matches the right operating channel */
153 if (local->hw.conf.channel->center_freq !=
154 ieee80211_channel_to_frequency(hti->control_chan))
158 channel_type = NL80211_CHAN_HT20;
160 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
161 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
162 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
163 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
164 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
165 if (!(local->hw.conf.channel->flags &
166 IEEE80211_CHAN_NO_HT40PLUS))
167 channel_type = NL80211_CHAN_HT40PLUS;
169 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
170 if (!(local->hw.conf.channel->flags &
171 IEEE80211_CHAN_NO_HT40MINUS))
172 channel_type = NL80211_CHAN_HT40MINUS;
178 if (local->tmp_channel)
179 local->tmp_channel_type = channel_type;
181 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
182 /* can only fail due to HT40+/- mismatch */
183 channel_type = NL80211_CHAN_HT20;
184 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
187 /* channel_type change automatically detected */
188 ieee80211_hw_config(local, 0);
190 if (prev_chantype != channel_type) {
192 sta = sta_info_get(sdata, bssid);
194 rate_control_rate_update(local, sband, sta,
195 IEEE80211_RC_HT_CHANGED,
200 ht_opmode = le16_to_cpu(hti->operation_mode);
202 /* if bss configuration changed store the new one */
203 if (sdata->ht_opmode_valid != enable_ht ||
204 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
205 prev_chantype != channel_type) {
206 changed |= BSS_CHANGED_HT;
207 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
208 sdata->ht_opmode_valid = enable_ht;
214 /* frame sending functions */
216 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
217 const u8 *bssid, u16 stype, u16 reason,
218 void *cookie, bool send_frame)
220 struct ieee80211_local *local = sdata->local;
221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
223 struct ieee80211_mgmt *mgmt;
225 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
227 printk(KERN_DEBUG "%s: failed to allocate buffer for "
228 "deauth/disassoc frame\n", sdata->name);
231 skb_reserve(skb, local->hw.extra_tx_headroom);
233 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
235 memcpy(mgmt->da, bssid, ETH_ALEN);
236 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
237 memcpy(mgmt->bssid, bssid, ETH_ALEN);
238 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
240 /* u.deauth.reason_code == u.disassoc.reason_code */
241 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
243 if (stype == IEEE80211_STYPE_DEAUTH)
245 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
247 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
250 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
252 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
253 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
254 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
257 ieee80211_tx_skb(sdata, skb);
262 void ieee80211_send_pspoll(struct ieee80211_local *local,
263 struct ieee80211_sub_if_data *sdata)
265 struct ieee80211_pspoll *pspoll;
268 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
272 pspoll = (struct ieee80211_pspoll *) skb->data;
273 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
275 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
276 ieee80211_tx_skb(sdata, skb);
279 void ieee80211_send_nullfunc(struct ieee80211_local *local,
280 struct ieee80211_sub_if_data *sdata,
284 struct ieee80211_hdr_3addr *nullfunc;
286 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
290 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
292 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
294 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
295 ieee80211_tx_skb(sdata, skb);
298 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
299 struct ieee80211_sub_if_data *sdata)
302 struct ieee80211_hdr *nullfunc;
305 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
308 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
310 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
311 "nullfunc frame\n", sdata->name);
314 skb_reserve(skb, local->hw.extra_tx_headroom);
316 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
317 memset(nullfunc, 0, 30);
318 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
319 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
320 nullfunc->frame_control = fc;
321 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
322 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
323 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
324 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
326 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
327 ieee80211_tx_skb(sdata, skb);
330 /* spectrum management related things */
331 static void ieee80211_chswitch_work(struct work_struct *work)
333 struct ieee80211_sub_if_data *sdata =
334 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
335 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
337 if (!ieee80211_sdata_running(sdata))
340 mutex_lock(&ifmgd->mtx);
341 if (!ifmgd->associated)
344 sdata->local->oper_channel = sdata->local->csa_channel;
345 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
347 /* XXX: shouldn't really modify cfg80211-owned data! */
348 ifmgd->associated->channel = sdata->local->oper_channel;
350 ieee80211_wake_queues_by_reason(&sdata->local->hw,
351 IEEE80211_QUEUE_STOP_REASON_CSA);
353 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
354 mutex_unlock(&ifmgd->mtx);
357 static void ieee80211_chswitch_timer(unsigned long data)
359 struct ieee80211_sub_if_data *sdata =
360 (struct ieee80211_sub_if_data *) data;
361 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
363 if (sdata->local->quiescing) {
364 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
368 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
371 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
372 struct ieee80211_channel_sw_ie *sw_elem,
373 struct ieee80211_bss *bss)
375 struct cfg80211_bss *cbss =
376 container_of((void *)bss, struct cfg80211_bss, priv);
377 struct ieee80211_channel *new_ch;
378 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
379 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
381 ASSERT_MGD_MTX(ifmgd);
383 if (!ifmgd->associated)
386 if (sdata->local->scanning)
389 /* Disregard subsequent beacons if we are already running a timer
392 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
395 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
396 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
399 sdata->local->csa_channel = new_ch;
401 if (sw_elem->count <= 1) {
402 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
404 ieee80211_stop_queues_by_reason(&sdata->local->hw,
405 IEEE80211_QUEUE_STOP_REASON_CSA);
406 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
407 mod_timer(&ifmgd->chswitch_timer,
409 msecs_to_jiffies(sw_elem->count *
410 cbss->beacon_interval));
414 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
415 u16 capab_info, u8 *pwr_constr_elem,
416 u8 pwr_constr_elem_len)
418 struct ieee80211_conf *conf = &sdata->local->hw.conf;
420 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
423 /* Power constraint IE length should be 1 octet */
424 if (pwr_constr_elem_len != 1)
427 if ((*pwr_constr_elem <= conf->channel->max_power) &&
428 (*pwr_constr_elem != sdata->local->power_constr_level)) {
429 sdata->local->power_constr_level = *pwr_constr_elem;
430 ieee80211_hw_config(sdata->local, 0);
435 static void ieee80211_enable_ps(struct ieee80211_local *local,
436 struct ieee80211_sub_if_data *sdata)
438 struct ieee80211_conf *conf = &local->hw.conf;
441 * If we are scanning right now then the parameters will
442 * take effect when scan finishes.
447 if (conf->dynamic_ps_timeout > 0 &&
448 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
449 mod_timer(&local->dynamic_ps_timer, jiffies +
450 msecs_to_jiffies(conf->dynamic_ps_timeout));
452 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
453 ieee80211_send_nullfunc(local, sdata, 1);
455 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
456 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
459 conf->flags |= IEEE80211_CONF_PS;
460 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
464 static void ieee80211_change_ps(struct ieee80211_local *local)
466 struct ieee80211_conf *conf = &local->hw.conf;
468 if (local->ps_sdata) {
469 ieee80211_enable_ps(local, local->ps_sdata);
470 } else if (conf->flags & IEEE80211_CONF_PS) {
471 conf->flags &= ~IEEE80211_CONF_PS;
472 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
473 del_timer_sync(&local->dynamic_ps_timer);
474 cancel_work_sync(&local->dynamic_ps_enable_work);
478 /* need to hold RTNL or interface lock */
479 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
481 struct ieee80211_sub_if_data *sdata, *found = NULL;
485 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
486 local->ps_sdata = NULL;
490 if (!list_empty(&local->work_list)) {
491 local->ps_sdata = NULL;
495 list_for_each_entry(sdata, &local->interfaces, list) {
496 if (!ieee80211_sdata_running(sdata))
498 if (sdata->vif.type != NL80211_IFTYPE_STATION)
504 if (count == 1 && found->u.mgd.powersave &&
505 found->u.mgd.associated &&
506 found->u.mgd.associated->beacon_ies &&
507 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
508 IEEE80211_STA_CONNECTION_POLL))) {
512 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
514 beaconint_us = ieee80211_tu_to_usec(
515 found->vif.bss_conf.beacon_int);
517 timeout = local->hw.conf.dynamic_ps_forced_timeout;
520 * The 2 second value is there for compatibility until
521 * the PM_QOS_NETWORK_LATENCY is configured with real
524 if (latency == 2000000000)
526 else if (latency <= 50000)
528 else if (latency <= 100000)
530 else if (latency <= 500000)
535 local->hw.conf.dynamic_ps_timeout = timeout;
537 if (beaconint_us > latency) {
538 local->ps_sdata = NULL;
540 struct ieee80211_bss *bss;
544 bss = (void *)found->u.mgd.associated->priv;
545 dtimper = bss->dtim_period;
547 /* If the TIM IE is invalid, pretend the value is 1 */
550 else if (dtimper > 1)
551 maxslp = min_t(int, dtimper,
552 latency / beaconint_us);
554 local->hw.conf.max_sleep_period = maxslp;
555 local->hw.conf.ps_dtim_period = dtimper;
556 local->ps_sdata = found;
559 local->ps_sdata = NULL;
563 ieee80211_change_ps(local);
566 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
568 struct ieee80211_local *local =
569 container_of(work, struct ieee80211_local,
570 dynamic_ps_disable_work);
572 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
573 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
574 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
577 ieee80211_wake_queues_by_reason(&local->hw,
578 IEEE80211_QUEUE_STOP_REASON_PS);
581 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
583 struct ieee80211_local *local =
584 container_of(work, struct ieee80211_local,
585 dynamic_ps_enable_work);
586 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
587 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
589 /* can only happen when PS was just disabled anyway */
593 if (local->hw.conf.flags & IEEE80211_CONF_PS)
596 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
597 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
598 ieee80211_send_nullfunc(local, sdata, 1);
600 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
601 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
602 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
603 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
604 local->hw.conf.flags |= IEEE80211_CONF_PS;
605 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
609 void ieee80211_dynamic_ps_timer(unsigned long data)
611 struct ieee80211_local *local = (void *) data;
613 if (local->quiescing || local->suspended)
616 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
620 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
621 struct ieee80211_if_managed *ifmgd,
622 u8 *wmm_param, size_t wmm_param_len)
624 struct ieee80211_tx_queue_params params;
627 u8 *pos, uapsd_queues = 0;
629 if (!local->ops->conf_tx)
632 if (local->hw.queues < 4)
638 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
641 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
642 uapsd_queues = local->uapsd_queues;
644 count = wmm_param[6] & 0x0f;
645 if (count == ifmgd->wmm_last_param_set)
647 ifmgd->wmm_last_param_set = count;
650 left = wmm_param_len - 8;
652 memset(¶ms, 0, sizeof(params));
655 for (; left >= 4; left -= 4, pos += 4) {
656 int aci = (pos[0] >> 5) & 0x03;
657 int acm = (pos[0] >> 4) & 0x01;
665 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
666 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
672 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
673 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
679 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
680 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
687 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
688 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
693 params.aifs = pos[0] & 0x0f;
694 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
695 params.cw_min = ecw2cw(pos[1] & 0x0f);
696 params.txop = get_unaligned_le16(pos + 2);
697 params.uapsd = uapsd;
699 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
700 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
701 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
702 wiphy_name(local->hw.wiphy), queue, aci, acm,
703 params.aifs, params.cw_min, params.cw_max, params.txop,
706 if (drv_conf_tx(local, queue, ¶ms))
707 printk(KERN_DEBUG "%s: failed to set TX queue "
708 "parameters for queue %d\n",
709 wiphy_name(local->hw.wiphy), queue);
712 /* enable WMM or activate new settings */
713 local->hw.conf.flags |= IEEE80211_CONF_QOS;
714 drv_config(local, IEEE80211_CONF_CHANGE_QOS);
717 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
718 u16 capab, bool erp_valid, u8 erp)
720 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
723 bool use_short_preamble;
727 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
728 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
730 use_protection = false;
731 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
734 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
735 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
736 use_short_slot = true;
738 if (use_protection != bss_conf->use_cts_prot) {
739 bss_conf->use_cts_prot = use_protection;
740 changed |= BSS_CHANGED_ERP_CTS_PROT;
743 if (use_short_preamble != bss_conf->use_short_preamble) {
744 bss_conf->use_short_preamble = use_short_preamble;
745 changed |= BSS_CHANGED_ERP_PREAMBLE;
748 if (use_short_slot != bss_conf->use_short_slot) {
749 bss_conf->use_short_slot = use_short_slot;
750 changed |= BSS_CHANGED_ERP_SLOT;
756 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
757 struct cfg80211_bss *cbss,
758 u32 bss_info_changed)
760 struct ieee80211_bss *bss = (void *)cbss->priv;
761 struct ieee80211_local *local = sdata->local;
763 bss_info_changed |= BSS_CHANGED_ASSOC;
764 /* set timing information */
765 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
766 sdata->vif.bss_conf.timestamp = cbss->tsf;
768 bss_info_changed |= BSS_CHANGED_BEACON_INT;
769 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
770 cbss->capability, bss->has_erp_value, bss->erp_value);
772 sdata->u.mgd.associated = cbss;
773 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
775 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
777 /* just to be sure */
778 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
779 IEEE80211_STA_BEACON_POLL);
782 * Always handle WMM once after association regardless
783 * of the first value the AP uses. Setting -1 here has
784 * that effect because the AP values is an unsigned
787 sdata->u.mgd.wmm_last_param_set = -1;
789 ieee80211_led_assoc(local, 1);
791 sdata->vif.bss_conf.assoc = 1;
793 * For now just always ask the driver to update the basic rateset
794 * when we have associated, we aren't checking whether it actually
797 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
799 /* And the BSSID changed - we're associated now */
800 bss_info_changed |= BSS_CHANGED_BSSID;
802 /* Tell the driver to monitor connection quality (if supported) */
803 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
804 sdata->vif.bss_conf.cqm_rssi_thold)
805 bss_info_changed |= BSS_CHANGED_CQM;
807 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
809 mutex_lock(&local->iflist_mtx);
810 ieee80211_recalc_ps(local, -1);
811 ieee80211_recalc_smps(local, sdata);
812 mutex_unlock(&local->iflist_mtx);
814 netif_tx_start_all_queues(sdata->dev);
815 netif_carrier_on(sdata->dev);
818 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
821 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
822 struct ieee80211_local *local = sdata->local;
823 struct sta_info *sta;
824 u32 changed = 0, config_changed = 0;
827 ASSERT_MGD_MTX(ifmgd);
829 if (WARN_ON(!ifmgd->associated))
832 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
834 ifmgd->associated = NULL;
835 memset(ifmgd->bssid, 0, ETH_ALEN);
838 * we need to commit the associated = NULL change because the
839 * scan code uses that to determine whether this iface should
840 * go to/wake up from powersave or not -- and could otherwise
841 * wake the queues erroneously.
846 * Thus, we can only afterwards stop the queues -- to account
847 * for the case where another CPU is finishing a scan at this
848 * time -- we don't want the scan code to enable queues.
851 netif_tx_stop_all_queues(sdata->dev);
852 netif_carrier_off(sdata->dev);
855 sta = sta_info_get(sdata, bssid);
857 set_sta_flags(sta, WLAN_STA_DISASSOC);
858 ieee80211_sta_tear_down_BA_sessions(sta);
862 changed |= ieee80211_reset_erp_info(sdata);
864 ieee80211_led_assoc(local, 0);
865 changed |= BSS_CHANGED_ASSOC;
866 sdata->vif.bss_conf.assoc = false;
868 ieee80211_set_wmm_default(sdata);
870 /* channel(_type) changes are handled by ieee80211_hw_config */
871 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
873 /* on the next assoc, re-program HT parameters */
874 sdata->ht_opmode_valid = false;
876 local->power_constr_level = 0;
878 del_timer_sync(&local->dynamic_ps_timer);
879 cancel_work_sync(&local->dynamic_ps_enable_work);
881 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
882 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
883 config_changed |= IEEE80211_CONF_CHANGE_PS;
886 ieee80211_hw_config(local, config_changed);
888 /* The BSSID (not really interesting) and HT changed */
889 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
890 ieee80211_bss_info_change_notify(sdata, changed);
893 sta_info_destroy_addr(sdata, bssid);
896 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
897 struct ieee80211_hdr *hdr)
900 * We can postpone the mgd.timer whenever receiving unicast frames
901 * from AP because we know that the connection is working both ways
902 * at that time. But multicast frames (and hence also beacons) must
903 * be ignored here, because we need to trigger the timer during
904 * data idle periods for sending the periodic probe request to the
905 * AP we're connected to.
907 if (is_multicast_ether_addr(hdr->addr1))
910 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
913 mod_timer(&sdata->u.mgd.conn_mon_timer,
914 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
917 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
922 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
923 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
924 ssid + 2, ssid[1], NULL, 0);
926 ifmgd->probe_send_count++;
927 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
928 run_again(ifmgd, ifmgd->probe_timeout);
931 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
934 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
935 bool already = false;
937 if (!ieee80211_sdata_running(sdata))
940 if (sdata->local->scanning)
943 if (sdata->local->tmp_channel)
946 mutex_lock(&ifmgd->mtx);
948 if (!ifmgd->associated)
951 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
952 if (beacon && net_ratelimit())
953 printk(KERN_DEBUG "%s: detected beacon loss from AP "
954 "- sending probe request\n", sdata->name);
958 * The driver/our work has already reported this event or the
959 * connection monitoring has kicked in and we have already sent
960 * a probe request. Or maybe the AP died and the driver keeps
961 * reporting until we disassociate...
963 * In either case we have to ignore the current call to this
964 * function (except for setting the correct probe reason bit)
965 * because otherwise we would reset the timer every time and
966 * never check whether we received a probe response!
968 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
969 IEEE80211_STA_CONNECTION_POLL))
973 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
975 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
980 mutex_lock(&sdata->local->iflist_mtx);
981 ieee80211_recalc_ps(sdata->local, -1);
982 mutex_unlock(&sdata->local->iflist_mtx);
984 ifmgd->probe_send_count = 0;
985 ieee80211_mgd_probe_ap_send(sdata);
987 mutex_unlock(&ifmgd->mtx);
990 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
992 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
993 struct ieee80211_local *local = sdata->local;
996 mutex_lock(&ifmgd->mtx);
997 if (!ifmgd->associated) {
998 mutex_unlock(&ifmgd->mtx);
1002 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1004 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1006 ieee80211_set_disassoc(sdata, true);
1007 ieee80211_recalc_idle(local);
1008 mutex_unlock(&ifmgd->mtx);
1010 * must be outside lock due to cfg80211,
1011 * but that's not a problem.
1013 ieee80211_send_deauth_disassoc(sdata, bssid,
1014 IEEE80211_STYPE_DEAUTH,
1015 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1019 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1021 struct ieee80211_sub_if_data *sdata =
1022 container_of(work, struct ieee80211_sub_if_data,
1023 u.mgd.beacon_connection_loss_work);
1025 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1026 __ieee80211_connection_loss(sdata);
1028 ieee80211_mgd_probe_ap(sdata, true);
1031 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1033 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1034 struct ieee80211_hw *hw = &sdata->local->hw;
1036 trace_api_beacon_loss(sdata);
1038 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1039 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1041 EXPORT_SYMBOL(ieee80211_beacon_loss);
1043 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1045 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1046 struct ieee80211_hw *hw = &sdata->local->hw;
1048 trace_api_connection_loss(sdata);
1050 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1051 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1053 EXPORT_SYMBOL(ieee80211_connection_loss);
1056 static enum rx_mgmt_action __must_check
1057 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1058 struct ieee80211_mgmt *mgmt, size_t len)
1060 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1061 const u8 *bssid = NULL;
1065 return RX_MGMT_NONE;
1067 ASSERT_MGD_MTX(ifmgd);
1069 bssid = ifmgd->associated->bssid;
1071 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1073 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1074 sdata->name, bssid, reason_code);
1076 ieee80211_set_disassoc(sdata, true);
1077 ieee80211_recalc_idle(sdata->local);
1079 return RX_MGMT_CFG80211_DEAUTH;
1083 static enum rx_mgmt_action __must_check
1084 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1085 struct ieee80211_mgmt *mgmt, size_t len)
1087 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1091 return RX_MGMT_NONE;
1093 ASSERT_MGD_MTX(ifmgd);
1095 if (WARN_ON(!ifmgd->associated))
1096 return RX_MGMT_NONE;
1098 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1099 return RX_MGMT_NONE;
1101 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1103 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1104 sdata->name, mgmt->sa, reason_code);
1106 ieee80211_set_disassoc(sdata, true);
1107 ieee80211_recalc_idle(sdata->local);
1108 return RX_MGMT_CFG80211_DISASSOC;
1112 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1113 struct ieee80211_mgmt *mgmt, size_t len)
1115 struct ieee80211_sub_if_data *sdata = wk->sdata;
1116 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1117 struct ieee80211_local *local = sdata->local;
1118 struct ieee80211_supported_band *sband;
1119 struct sta_info *sta;
1120 struct cfg80211_bss *cbss = wk->assoc.bss;
1122 u32 rates, basic_rates;
1123 u16 capab_info, aid;
1124 struct ieee802_11_elems elems;
1125 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1128 bool have_higher_than_11mbit = false;
1129 u16 ap_ht_cap_flags;
1131 /* AssocResp and ReassocResp have identical structure */
1133 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1134 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1136 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1137 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1138 "set\n", sdata->name, aid);
1139 aid &= ~(BIT(15) | BIT(14));
1141 pos = mgmt->u.assoc_resp.variable;
1142 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1144 if (!elems.supp_rates) {
1145 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1152 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
1154 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1155 " the AP\n", sdata->name);
1159 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1161 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1162 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1166 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1168 for (i = 0; i < elems.supp_rates_len; i++) {
1169 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1170 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1173 have_higher_than_11mbit = true;
1175 for (j = 0; j < sband->n_bitrates; j++) {
1176 if (sband->bitrates[j].bitrate == rate) {
1179 basic_rates |= BIT(j);
1185 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1186 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1187 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1190 have_higher_than_11mbit = true;
1192 for (j = 0; j < sband->n_bitrates; j++) {
1193 if (sband->bitrates[j].bitrate == rate) {
1196 basic_rates |= BIT(j);
1202 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1203 sdata->vif.bss_conf.basic_rates = basic_rates;
1205 /* cf. IEEE 802.11 9.2.12 */
1206 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1207 have_higher_than_11mbit)
1208 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1210 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1212 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1213 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1214 elems.ht_cap_elem, &sta->sta.ht_cap);
1216 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1218 rate_control_rate_init(sta);
1220 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1221 set_sta_flags(sta, WLAN_STA_MFP);
1223 if (elems.wmm_param)
1224 set_sta_flags(sta, WLAN_STA_WME);
1226 err = sta_info_insert(sta);
1229 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1230 " the AP (error %d)\n", sdata->name, err);
1234 if (elems.wmm_param)
1235 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1236 elems.wmm_param_len);
1238 ieee80211_set_wmm_default(sdata);
1240 local->oper_channel = wk->chan;
1242 if (elems.ht_info_elem && elems.wmm_param &&
1243 (sdata->local->hw.queues >= 4) &&
1244 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1245 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1246 cbss->bssid, ap_ht_cap_flags);
1248 /* set AID and assoc capability,
1249 * ieee80211_set_associated() will tell the driver */
1250 bss_conf->aid = aid;
1251 bss_conf->assoc_capability = capab_info;
1252 ieee80211_set_associated(sdata, cbss, changed);
1255 * If we're using 4-addr mode, let the AP know that we're
1256 * doing so, so that it can create the STA VLAN on its side
1258 if (ifmgd->use_4addr)
1259 ieee80211_send_4addr_nullfunc(local, sdata);
1262 * Start timer to probe the connection to the AP now.
1263 * Also start the timer that will detect beacon loss.
1265 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1266 mod_beacon_timer(sdata);
1272 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1273 struct ieee80211_mgmt *mgmt,
1275 struct ieee80211_rx_status *rx_status,
1276 struct ieee802_11_elems *elems,
1279 struct ieee80211_local *local = sdata->local;
1281 struct ieee80211_bss *bss;
1282 struct ieee80211_channel *channel;
1283 bool need_ps = false;
1285 if (sdata->u.mgd.associated) {
1286 bss = (void *)sdata->u.mgd.associated->priv;
1287 /* not previously set so we may need to recalc */
1288 need_ps = !bss->dtim_period;
1291 if (elems->ds_params && elems->ds_params_len == 1)
1292 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1294 freq = rx_status->freq;
1296 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1298 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1301 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1304 ieee80211_rx_bss_put(local, bss);
1306 if (!sdata->u.mgd.associated)
1310 mutex_lock(&local->iflist_mtx);
1311 ieee80211_recalc_ps(local, -1);
1312 mutex_unlock(&local->iflist_mtx);
1315 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1316 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1318 struct ieee80211_channel_sw_ie *sw_elem =
1319 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1320 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1325 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1326 struct sk_buff *skb)
1328 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1329 struct ieee80211_if_managed *ifmgd;
1330 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1331 size_t baselen, len = skb->len;
1332 struct ieee802_11_elems elems;
1334 ifmgd = &sdata->u.mgd;
1336 ASSERT_MGD_MTX(ifmgd);
1338 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1339 return; /* ignore ProbeResp to foreign address */
1341 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1345 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1348 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1350 if (ifmgd->associated &&
1351 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
1352 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1353 IEEE80211_STA_CONNECTION_POLL)) {
1354 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1355 IEEE80211_STA_BEACON_POLL);
1356 mutex_lock(&sdata->local->iflist_mtx);
1357 ieee80211_recalc_ps(sdata->local, -1);
1358 mutex_unlock(&sdata->local->iflist_mtx);
1360 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1364 * We've received a probe response, but are not sure whether
1365 * we have or will be receiving any beacons or data, so let's
1366 * schedule the timers again, just in case.
1368 mod_beacon_timer(sdata);
1370 mod_timer(&ifmgd->conn_mon_timer,
1371 round_jiffies_up(jiffies +
1372 IEEE80211_CONNECTION_IDLE_TIME));
1377 * This is the canonical list of information elements we care about,
1378 * the filter code also gives us all changes to the Microsoft OUI
1379 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1381 * We implement beacon filtering in software since that means we can
1382 * avoid processing the frame here and in cfg80211, and userspace
1383 * will not be able to tell whether the hardware supports it or not.
1385 * XXX: This list needs to be dynamic -- userspace needs to be able to
1386 * add items it requires. It also needs to be able to tell us to
1387 * look out for other vendor IEs.
1389 static const u64 care_about_ies =
1390 (1ULL << WLAN_EID_COUNTRY) |
1391 (1ULL << WLAN_EID_ERP_INFO) |
1392 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1393 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1394 (1ULL << WLAN_EID_HT_CAPABILITY) |
1395 (1ULL << WLAN_EID_HT_INFORMATION);
1397 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1398 struct ieee80211_mgmt *mgmt,
1400 struct ieee80211_rx_status *rx_status)
1402 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1403 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1405 struct ieee802_11_elems elems;
1406 struct ieee80211_local *local = sdata->local;
1408 bool erp_valid, directed_tim = false;
1413 ASSERT_MGD_MTX(ifmgd);
1415 /* Process beacon from the current BSS */
1416 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1420 if (rx_status->freq != local->hw.conf.channel->center_freq)
1424 * We might have received a number of frames, among them a
1425 * disassoc frame and a beacon...
1427 if (!ifmgd->associated)
1430 bssid = ifmgd->associated->bssid;
1433 * And in theory even frames from a different AP we were just
1434 * associated to a split-second ago!
1436 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1439 /* Track average RSSI from the Beacon frames of the current AP */
1440 ifmgd->last_beacon_signal = rx_status->signal;
1441 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1442 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1443 ifmgd->ave_beacon_signal = rx_status->signal;
1444 ifmgd->last_cqm_event_signal = 0;
1446 ifmgd->ave_beacon_signal =
1447 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1448 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1449 ifmgd->ave_beacon_signal) / 16;
1451 if (bss_conf->cqm_rssi_thold &&
1452 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1453 int sig = ifmgd->ave_beacon_signal / 16;
1454 int last_event = ifmgd->last_cqm_event_signal;
1455 int thold = bss_conf->cqm_rssi_thold;
1456 int hyst = bss_conf->cqm_rssi_hyst;
1458 (last_event == 0 || sig < last_event - hyst)) {
1459 ifmgd->last_cqm_event_signal = sig;
1460 ieee80211_cqm_rssi_notify(
1462 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1464 } else if (sig > thold &&
1465 (last_event == 0 || sig > last_event + hyst)) {
1466 ifmgd->last_cqm_event_signal = sig;
1467 ieee80211_cqm_rssi_notify(
1469 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1474 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1475 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1476 if (net_ratelimit()) {
1477 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1478 "to a received beacon\n", sdata->name);
1481 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1482 mutex_lock(&local->iflist_mtx);
1483 ieee80211_recalc_ps(local, -1);
1484 mutex_unlock(&local->iflist_mtx);
1488 * Push the beacon loss detection into the future since
1489 * we are processing a beacon from the AP just now.
1491 mod_beacon_timer(sdata);
1493 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1494 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1495 len - baselen, &elems,
1496 care_about_ies, ncrc);
1498 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1499 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1502 if (ncrc != ifmgd->beacon_crc) {
1503 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1506 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1507 elems.wmm_param_len);
1510 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1512 if (local->hw.conf.dynamic_ps_timeout > 0) {
1513 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1514 ieee80211_hw_config(local,
1515 IEEE80211_CONF_CHANGE_PS);
1516 ieee80211_send_nullfunc(local, sdata, 0);
1518 local->pspolling = true;
1521 * Here is assumed that the driver will be
1522 * able to send ps-poll frame and receive a
1523 * response even though power save mode is
1524 * enabled, but some drivers might require
1525 * to disable power save here. This needs
1526 * to be investigated.
1528 ieee80211_send_pspoll(local, sdata);
1533 if (ncrc == ifmgd->beacon_crc)
1535 ifmgd->beacon_crc = ncrc;
1537 if (elems.erp_info && elems.erp_info_len >= 1) {
1539 erp_value = elems.erp_info[0];
1543 changed |= ieee80211_handle_bss_capability(sdata,
1544 le16_to_cpu(mgmt->u.beacon.capab_info),
1545 erp_valid, erp_value);
1548 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1549 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1550 struct sta_info *sta;
1551 struct ieee80211_supported_band *sband;
1552 u16 ap_ht_cap_flags;
1556 sta = sta_info_get(sdata, bssid);
1557 if (WARN_ON(!sta)) {
1562 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1564 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1565 elems.ht_cap_elem, &sta->sta.ht_cap);
1567 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1571 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1572 bssid, ap_ht_cap_flags);
1575 /* Note: country IE parsing is done for us by cfg80211 */
1576 if (elems.country_elem) {
1577 /* TODO: IBSS also needs this */
1578 if (elems.pwr_constr_elem)
1579 ieee80211_handle_pwr_constr(sdata,
1580 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1581 elems.pwr_constr_elem,
1582 elems.pwr_constr_elem_len);
1585 ieee80211_bss_info_change_notify(sdata, changed);
1588 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1589 struct sk_buff *skb)
1591 struct ieee80211_local *local = sdata->local;
1592 struct ieee80211_mgmt *mgmt;
1596 return RX_DROP_MONITOR;
1598 mgmt = (struct ieee80211_mgmt *) skb->data;
1599 fc = le16_to_cpu(mgmt->frame_control);
1601 switch (fc & IEEE80211_FCTL_STYPE) {
1602 case IEEE80211_STYPE_PROBE_RESP:
1603 case IEEE80211_STYPE_BEACON:
1604 case IEEE80211_STYPE_DEAUTH:
1605 case IEEE80211_STYPE_DISASSOC:
1606 case IEEE80211_STYPE_ACTION:
1607 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1608 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1612 return RX_DROP_MONITOR;
1615 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1616 struct sk_buff *skb)
1618 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1619 struct ieee80211_rx_status *rx_status;
1620 struct ieee80211_mgmt *mgmt;
1621 enum rx_mgmt_action rma = RX_MGMT_NONE;
1624 rx_status = (struct ieee80211_rx_status *) skb->cb;
1625 mgmt = (struct ieee80211_mgmt *) skb->data;
1626 fc = le16_to_cpu(mgmt->frame_control);
1628 mutex_lock(&ifmgd->mtx);
1630 if (ifmgd->associated &&
1631 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1632 switch (fc & IEEE80211_FCTL_STYPE) {
1633 case IEEE80211_STYPE_BEACON:
1634 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1637 case IEEE80211_STYPE_PROBE_RESP:
1638 ieee80211_rx_mgmt_probe_resp(sdata, skb);
1640 case IEEE80211_STYPE_DEAUTH:
1641 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1643 case IEEE80211_STYPE_DISASSOC:
1644 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1646 case IEEE80211_STYPE_ACTION:
1647 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1650 ieee80211_sta_process_chanswitch(sdata,
1651 &mgmt->u.action.u.chan_switch.sw_elem,
1652 (void *)ifmgd->associated->priv);
1655 mutex_unlock(&ifmgd->mtx);
1661 case RX_MGMT_CFG80211_DEAUTH:
1662 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1664 case RX_MGMT_CFG80211_DISASSOC:
1665 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1668 WARN(1, "unexpected: %d", rma);
1673 mutex_unlock(&ifmgd->mtx);
1675 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
1676 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
1677 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1683 static void ieee80211_sta_timer(unsigned long data)
1685 struct ieee80211_sub_if_data *sdata =
1686 (struct ieee80211_sub_if_data *) data;
1687 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1688 struct ieee80211_local *local = sdata->local;
1690 if (local->quiescing) {
1691 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1695 ieee80211_queue_work(&local->hw, &ifmgd->work);
1698 static void ieee80211_sta_work(struct work_struct *work)
1700 struct ieee80211_sub_if_data *sdata =
1701 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1702 struct ieee80211_local *local = sdata->local;
1703 struct ieee80211_if_managed *ifmgd;
1704 struct sk_buff *skb;
1706 if (!ieee80211_sdata_running(sdata))
1709 if (local->scanning)
1712 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1716 * ieee80211_queue_work() should have picked up most cases,
1717 * here we'll pick the the rest.
1719 if (WARN(local->suspended, "STA MLME work scheduled while "
1720 "going to suspend\n"))
1723 ifmgd = &sdata->u.mgd;
1725 /* first process frames to avoid timing out while a frame is pending */
1726 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1727 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1729 /* then process the rest of the work */
1730 mutex_lock(&ifmgd->mtx);
1732 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1733 IEEE80211_STA_CONNECTION_POLL) &&
1734 ifmgd->associated) {
1737 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1738 if (time_is_after_jiffies(ifmgd->probe_timeout))
1739 run_again(ifmgd, ifmgd->probe_timeout);
1741 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1742 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1743 printk(KERN_DEBUG "No probe response from AP %pM"
1744 " after %dms, try %d\n", bssid,
1745 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1746 ifmgd->probe_send_count);
1748 ieee80211_mgd_probe_ap_send(sdata);
1751 * We actually lost the connection ... or did we?
1754 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1755 IEEE80211_STA_BEACON_POLL);
1756 printk(KERN_DEBUG "No probe response from AP %pM"
1757 " after %dms, disconnecting.\n",
1758 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
1759 ieee80211_set_disassoc(sdata, true);
1760 ieee80211_recalc_idle(local);
1761 mutex_unlock(&ifmgd->mtx);
1763 * must be outside lock due to cfg80211,
1764 * but that's not a problem.
1766 ieee80211_send_deauth_disassoc(sdata, bssid,
1767 IEEE80211_STYPE_DEAUTH,
1768 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1770 mutex_lock(&ifmgd->mtx);
1774 mutex_unlock(&ifmgd->mtx);
1777 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1779 struct ieee80211_sub_if_data *sdata =
1780 (struct ieee80211_sub_if_data *) data;
1781 struct ieee80211_local *local = sdata->local;
1783 if (local->quiescing)
1786 ieee80211_queue_work(&sdata->local->hw,
1787 &sdata->u.mgd.beacon_connection_loss_work);
1790 static void ieee80211_sta_conn_mon_timer(unsigned long data)
1792 struct ieee80211_sub_if_data *sdata =
1793 (struct ieee80211_sub_if_data *) data;
1794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1795 struct ieee80211_local *local = sdata->local;
1797 if (local->quiescing)
1800 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
1803 static void ieee80211_sta_monitor_work(struct work_struct *work)
1805 struct ieee80211_sub_if_data *sdata =
1806 container_of(work, struct ieee80211_sub_if_data,
1807 u.mgd.monitor_work);
1809 ieee80211_mgd_probe_ap(sdata, false);
1812 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1814 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1815 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1816 IEEE80211_STA_CONNECTION_POLL);
1818 /* let's probe the connection once */
1819 ieee80211_queue_work(&sdata->local->hw,
1820 &sdata->u.mgd.monitor_work);
1821 /* and do all the other regular work too */
1822 ieee80211_queue_work(&sdata->local->hw,
1823 &sdata->u.mgd.work);
1828 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1830 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1833 * we need to use atomic bitops for the running bits
1834 * only because both timers might fire at the same
1835 * time -- the code here is properly synchronised.
1838 cancel_work_sync(&ifmgd->work);
1839 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
1840 if (del_timer_sync(&ifmgd->timer))
1841 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1843 cancel_work_sync(&ifmgd->chswitch_work);
1844 if (del_timer_sync(&ifmgd->chswitch_timer))
1845 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1847 cancel_work_sync(&ifmgd->monitor_work);
1848 /* these will just be re-established on connection */
1849 del_timer_sync(&ifmgd->conn_mon_timer);
1850 del_timer_sync(&ifmgd->bcn_mon_timer);
1853 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1855 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1857 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1858 add_timer(&ifmgd->timer);
1859 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1860 add_timer(&ifmgd->chswitch_timer);
1864 /* interface setup */
1865 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1867 struct ieee80211_if_managed *ifmgd;
1869 ifmgd = &sdata->u.mgd;
1870 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1871 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
1872 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1873 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1874 ieee80211_beacon_connection_loss_work);
1875 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1876 (unsigned long) sdata);
1877 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1878 (unsigned long) sdata);
1879 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1880 (unsigned long) sdata);
1881 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1882 (unsigned long) sdata);
1883 skb_queue_head_init(&ifmgd->skb_queue);
1887 mutex_init(&ifmgd->mtx);
1889 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1890 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1892 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1895 /* scan finished notification */
1896 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1898 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1900 /* Restart STA timers */
1902 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1903 ieee80211_restart_sta_timer(sdata);
1907 int ieee80211_max_network_latency(struct notifier_block *nb,
1908 unsigned long data, void *dummy)
1910 s32 latency_usec = (s32) data;
1911 struct ieee80211_local *local =
1912 container_of(nb, struct ieee80211_local,
1913 network_latency_notifier);
1915 mutex_lock(&local->iflist_mtx);
1916 ieee80211_recalc_ps(local, latency_usec);
1917 mutex_unlock(&local->iflist_mtx);
1923 static enum work_done_result
1924 ieee80211_probe_auth_done(struct ieee80211_work *wk,
1925 struct sk_buff *skb)
1928 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1929 return WORK_DONE_DESTROY;
1932 if (wk->type == IEEE80211_WORK_AUTH) {
1933 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1934 return WORK_DONE_DESTROY;
1937 mutex_lock(&wk->sdata->u.mgd.mtx);
1938 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1939 mutex_unlock(&wk->sdata->u.mgd.mtx);
1941 wk->type = IEEE80211_WORK_AUTH;
1942 wk->probe_auth.tries = 0;
1943 return WORK_DONE_REQUEUE;
1946 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1947 struct cfg80211_auth_request *req)
1950 struct ieee80211_work *wk;
1953 if (req->local_state_change)
1954 return 0; /* no need to update mac80211 state */
1956 switch (req->auth_type) {
1957 case NL80211_AUTHTYPE_OPEN_SYSTEM:
1958 auth_alg = WLAN_AUTH_OPEN;
1960 case NL80211_AUTHTYPE_SHARED_KEY:
1961 auth_alg = WLAN_AUTH_SHARED_KEY;
1963 case NL80211_AUTHTYPE_FT:
1964 auth_alg = WLAN_AUTH_FT;
1966 case NL80211_AUTHTYPE_NETWORK_EAP:
1967 auth_alg = WLAN_AUTH_LEAP;
1973 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1977 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
1979 if (req->ie && req->ie_len) {
1980 memcpy(wk->ie, req->ie, req->ie_len);
1981 wk->ie_len = req->ie_len;
1984 if (req->key && req->key_len) {
1985 wk->probe_auth.key_len = req->key_len;
1986 wk->probe_auth.key_idx = req->key_idx;
1987 memcpy(wk->probe_auth.key, req->key, req->key_len);
1990 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
1991 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
1992 wk->probe_auth.ssid_len = ssid[1];
1994 wk->probe_auth.algorithm = auth_alg;
1995 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
1997 /* if we already have a probe, don't probe again */
1998 if (req->bss->proberesp_ies)
1999 wk->type = IEEE80211_WORK_AUTH;
2001 wk->type = IEEE80211_WORK_DIRECT_PROBE;
2002 wk->chan = req->bss->channel;
2004 wk->done = ieee80211_probe_auth_done;
2006 ieee80211_add_work(wk);
2010 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2011 struct sk_buff *skb)
2013 struct ieee80211_mgmt *mgmt;
2017 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2018 return WORK_DONE_DESTROY;
2021 mgmt = (void *)skb->data;
2022 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2024 if (status == WLAN_STATUS_SUCCESS) {
2025 mutex_lock(&wk->sdata->u.mgd.mtx);
2026 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2027 mutex_unlock(&wk->sdata->u.mgd.mtx);
2028 /* oops -- internal error -- send timeout for now */
2029 cfg80211_send_assoc_timeout(wk->sdata->dev,
2031 return WORK_DONE_DESTROY;
2033 mutex_unlock(&wk->sdata->u.mgd.mtx);
2036 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2037 return WORK_DONE_DESTROY;
2040 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2041 struct cfg80211_assoc_request *req)
2043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2044 struct ieee80211_bss *bss = (void *)req->bss->priv;
2045 struct ieee80211_work *wk;
2049 mutex_lock(&ifmgd->mtx);
2050 if (ifmgd->associated) {
2051 if (!req->prev_bssid ||
2052 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2055 * We are already associated and the request was not a
2056 * reassociation request from the current BSS, so
2059 mutex_unlock(&ifmgd->mtx);
2063 /* Trying to reassociate - clear previous association state */
2064 ieee80211_set_disassoc(sdata, true);
2066 mutex_unlock(&ifmgd->mtx);
2068 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2072 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2073 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2075 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2076 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2077 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2078 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2079 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2082 if (req->ie && req->ie_len) {
2083 memcpy(wk->ie, req->ie, req->ie_len);
2084 wk->ie_len = req->ie_len;
2088 wk->assoc.bss = req->bss;
2090 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2092 /* new association always uses requested smps mode */
2093 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2094 if (ifmgd->powersave)
2095 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2097 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2099 ifmgd->ap_smps = ifmgd->req_smps;
2101 wk->assoc.smps = ifmgd->ap_smps;
2103 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2104 * We still associate in non-HT mode (11a/b/g) if any one of these
2105 * ciphers is configured as pairwise.
2106 * We can set this to true for non-11n hardware, that'll be checked
2107 * separately along with the peer capabilities.
2109 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2110 wk->assoc.capability = req->bss->capability;
2111 wk->assoc.wmm_used = bss->wmm_used;
2112 wk->assoc.supp_rates = bss->supp_rates;
2113 wk->assoc.supp_rates_len = bss->supp_rates_len;
2114 wk->assoc.ht_information_ie =
2115 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2117 if (bss->wmm_used && bss->uapsd_supported &&
2118 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2119 wk->assoc.uapsd_used = true;
2120 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2122 wk->assoc.uapsd_used = false;
2123 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2126 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2127 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2128 wk->assoc.ssid_len = ssid[1];
2130 if (req->prev_bssid)
2131 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2133 wk->type = IEEE80211_WORK_ASSOC;
2134 wk->chan = req->bss->channel;
2136 wk->done = ieee80211_assoc_done;
2139 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2140 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2142 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2143 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2146 if (req->crypto.control_port)
2147 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2149 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2151 ieee80211_add_work(wk);
2155 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2156 struct cfg80211_deauth_request *req,
2159 struct ieee80211_local *local = sdata->local;
2160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2161 struct ieee80211_work *wk;
2162 const u8 *bssid = req->bss->bssid;
2164 mutex_lock(&ifmgd->mtx);
2166 if (ifmgd->associated == req->bss) {
2167 bssid = req->bss->bssid;
2168 ieee80211_set_disassoc(sdata, true);
2169 mutex_unlock(&ifmgd->mtx);
2171 bool not_auth_yet = false;
2173 mutex_unlock(&ifmgd->mtx);
2175 mutex_lock(&local->work_mtx);
2176 list_for_each_entry(wk, &local->work_list, list) {
2177 if (wk->sdata != sdata)
2180 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2181 wk->type != IEEE80211_WORK_AUTH &&
2182 wk->type != IEEE80211_WORK_ASSOC)
2185 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2188 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2189 list_del_rcu(&wk->list);
2193 mutex_unlock(&local->work_mtx);
2196 * If somebody requests authentication and we haven't
2197 * sent out an auth frame yet there's no need to send
2198 * out a deauth frame either. If the state was PROBE,
2199 * then this is the case. If it's AUTH we have sent a
2200 * frame, and if it's IDLE we have completed the auth
2204 __cfg80211_auth_canceled(sdata->dev, bssid);
2209 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2210 sdata->name, bssid, req->reason_code);
2212 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2213 req->reason_code, cookie,
2214 !req->local_state_change);
2216 ieee80211_recalc_idle(sdata->local);
2221 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2222 struct cfg80211_disassoc_request *req,
2225 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2228 mutex_lock(&ifmgd->mtx);
2231 * cfg80211 should catch this ... but it's racy since
2232 * we can receive a disassoc frame, process it, hand it
2233 * to cfg80211 while that's in a locked section already
2234 * trying to tell us that the user wants to disconnect.
2236 if (ifmgd->associated != req->bss) {
2237 mutex_unlock(&ifmgd->mtx);
2241 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2242 sdata->name, req->bss->bssid, req->reason_code);
2244 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2245 ieee80211_set_disassoc(sdata, false);
2247 mutex_unlock(&ifmgd->mtx);
2249 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2250 IEEE80211_STYPE_DISASSOC, req->reason_code,
2251 cookie, !req->local_state_change);
2252 sta_info_destroy_addr(sdata, bssid);
2254 ieee80211_recalc_idle(sdata->local);
2259 int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
2260 struct ieee80211_channel *chan,
2261 enum nl80211_channel_type channel_type,
2262 const u8 *buf, size_t len, u64 *cookie)
2264 struct ieee80211_local *local = sdata->local;
2265 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2266 struct sk_buff *skb;
2268 /* Check that we are on the requested channel for transmission */
2269 if ((chan != local->tmp_channel ||
2270 channel_type != local->tmp_channel_type) &&
2271 (chan != local->oper_channel ||
2272 channel_type != local->_oper_channel_type))
2275 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2278 skb_reserve(skb, local->hw.extra_tx_headroom);
2280 memcpy(skb_put(skb, len), buf, len);
2282 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
2283 IEEE80211_SKB_CB(skb)->flags |=
2284 IEEE80211_TX_INTFL_DONT_ENCRYPT;
2285 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2286 IEEE80211_TX_CTL_REQ_TX_STATUS;
2287 skb->dev = sdata->dev;
2288 ieee80211_tx_skb(sdata, skb);
2290 *cookie = (unsigned long) skb;
2294 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2295 enum nl80211_cqm_rssi_threshold_event rssi_event,
2298 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2300 trace_api_cqm_rssi_notify(sdata, rssi_event);
2302 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2304 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);