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/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_MAX_TRIES 3
35 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37 #define IEEE80211_ASSOC_MAX_TRIES 3
39 static int max_nullfunc_tries = 2;
40 module_param(max_nullfunc_tries, int, 0644);
41 MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
44 static int max_probe_tries = 5;
45 module_param(max_probe_tries, int, 0644);
46 MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
57 #define IEEE80211_BEACON_LOSS_COUNT 7
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
63 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
69 static int probe_wait_ms = 500;
70 module_param(probe_wait_ms, int, 0644);
71 MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
80 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
86 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88 #define TMR_RUNNING_TIMER 0
89 #define TMR_RUNNING_CHANSW 1
91 #define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
100 /* no action required */
103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
120 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
122 lockdep_assert_held(&ifmgd->mtx);
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
135 static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
137 ASSERT_MGD_MTX(ifmgd);
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
144 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
149 mod_timer(&sdata->u.mgd.bcn_mon_timer,
150 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
153 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157 if (unlikely(!sdata->u.mgd.associated))
160 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
163 mod_timer(&sdata->u.mgd.conn_mon_timer,
164 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
166 ifmgd->probe_send_count = 0;
169 static int ecw2cw(int ecw)
171 return (1 << ecw) - 1;
174 static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
175 struct ieee80211_ht_operation *ht_oper,
176 const u8 *bssid, bool reconfig)
178 struct ieee80211_local *local = sdata->local;
179 struct ieee80211_supported_band *sband;
180 struct sta_info *sta;
183 bool disable_40 = false;
185 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
187 switch (sdata->vif.bss_conf.channel_type) {
188 case NL80211_CHAN_HT40PLUS:
189 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
192 case NL80211_CHAN_HT40MINUS:
193 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
204 mutex_lock(&local->sta_mtx);
205 sta = sta_info_get(sdata, bssid);
209 if (sta && !sta->supports_40mhz)
212 if (sta && (!reconfig ||
213 (disable_40 != !(sta->sta.ht_cap.cap &
214 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
217 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
219 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
221 rate_control_rate_update(local, sband, sta,
222 IEEE80211_RC_BW_CHANGED);
224 mutex_unlock(&local->sta_mtx);
226 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
228 /* if bss configuration changed store the new one */
229 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
230 changed |= BSS_CHANGED_HT;
231 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
237 /* frame sending functions */
239 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
240 struct ieee80211_supported_band *sband,
246 for (i = 0; i < supp_rates_len; i++) {
247 int rate = (supp_rates[i] & 0x7F) * 5;
249 for (j = 0; j < sband->n_bitrates; j++)
250 if (sband->bitrates[j].bitrate == rate) {
260 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
261 struct sk_buff *skb, const u8 *ht_oper_ie,
262 struct ieee80211_supported_band *sband,
263 struct ieee80211_channel *channel,
264 enum ieee80211_smps_mode smps)
266 struct ieee80211_ht_operation *ht_oper;
268 u32 flags = channel->flags;
270 struct ieee80211_sta_ht_cap ht_cap;
272 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
277 if (ht_oper_ie[1] < sizeof(struct ieee80211_ht_operation))
280 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
281 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
283 ht_oper = (struct ieee80211_ht_operation *)(ht_oper_ie + 2);
285 /* determine capability flags */
288 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
289 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
290 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
291 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
292 cap &= ~IEEE80211_HT_CAP_SGI_40;
295 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
296 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
297 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
298 cap &= ~IEEE80211_HT_CAP_SGI_40;
304 * If 40 MHz was disabled associate as though we weren't
305 * capable of 40 MHz -- some broken APs will never fall
306 * back to trying to transmit in 20 MHz.
308 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
309 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
310 cap &= ~IEEE80211_HT_CAP_SGI_40;
313 /* set SM PS mode properly */
314 cap &= ~IEEE80211_HT_CAP_SM_PS;
316 case IEEE80211_SMPS_AUTOMATIC:
317 case IEEE80211_SMPS_NUM_MODES:
319 case IEEE80211_SMPS_OFF:
320 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
321 IEEE80211_HT_CAP_SM_PS_SHIFT;
323 case IEEE80211_SMPS_STATIC:
324 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
325 IEEE80211_HT_CAP_SM_PS_SHIFT;
327 case IEEE80211_SMPS_DYNAMIC:
328 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
329 IEEE80211_HT_CAP_SM_PS_SHIFT;
333 /* reserve and fill IE */
334 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
335 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
338 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
340 struct ieee80211_local *local = sdata->local;
341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
342 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
344 struct ieee80211_mgmt *mgmt;
346 size_t offset = 0, noffset;
347 int i, count, rates_len, supp_rates_len;
349 struct ieee80211_supported_band *sband;
352 lockdep_assert_held(&ifmgd->mtx);
354 sband = local->hw.wiphy->bands[local->oper_channel->band];
356 if (assoc_data->supp_rates_len) {
358 * Get all rates supported by the device and the AP as
359 * some APs don't like getting a superset of their rates
360 * in the association request (e.g. D-Link DAP 1353 in
363 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
364 assoc_data->supp_rates_len,
368 * In case AP not provide any supported rates information
369 * before association, we send information element(s) with
370 * all rates that we support.
373 rates_len = sband->n_bitrates;
376 skb = alloc_skb(local->hw.extra_tx_headroom +
377 sizeof(*mgmt) + /* bit too much but doesn't matter */
378 2 + assoc_data->ssid_len + /* SSID */
379 4 + rates_len + /* (extended) rates */
380 4 + /* power capability */
381 2 + 2 * sband->n_channels + /* supported channels */
382 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
383 assoc_data->ie_len + /* extra IEs */
389 skb_reserve(skb, local->hw.extra_tx_headroom);
391 capab = WLAN_CAPABILITY_ESS;
393 if (sband->band == IEEE80211_BAND_2GHZ) {
394 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
395 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
396 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
397 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
400 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
401 capab |= WLAN_CAPABILITY_PRIVACY;
403 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
404 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
405 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
407 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
409 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
410 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
411 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
413 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
415 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
416 IEEE80211_STYPE_REASSOC_REQ);
417 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
418 mgmt->u.reassoc_req.listen_interval =
419 cpu_to_le16(local->hw.conf.listen_interval);
420 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
424 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
425 IEEE80211_STYPE_ASSOC_REQ);
426 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
427 mgmt->u.assoc_req.listen_interval =
428 cpu_to_le16(local->hw.conf.listen_interval);
432 pos = skb_put(skb, 2 + assoc_data->ssid_len);
433 *pos++ = WLAN_EID_SSID;
434 *pos++ = assoc_data->ssid_len;
435 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
437 /* add all rates which were marked to be used above */
438 supp_rates_len = rates_len;
439 if (supp_rates_len > 8)
442 pos = skb_put(skb, supp_rates_len + 2);
443 *pos++ = WLAN_EID_SUPP_RATES;
444 *pos++ = supp_rates_len;
447 for (i = 0; i < sband->n_bitrates; i++) {
448 if (BIT(i) & rates) {
449 int rate = sband->bitrates[i].bitrate;
450 *pos++ = (u8) (rate / 5);
456 if (rates_len > count) {
457 pos = skb_put(skb, rates_len - count + 2);
458 *pos++ = WLAN_EID_EXT_SUPP_RATES;
459 *pos++ = rates_len - count;
461 for (i++; i < sband->n_bitrates; i++) {
462 if (BIT(i) & rates) {
463 int rate = sband->bitrates[i].bitrate;
464 *pos++ = (u8) (rate / 5);
469 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
470 /* 1. power capabilities */
471 pos = skb_put(skb, 4);
472 *pos++ = WLAN_EID_PWR_CAPABILITY;
474 *pos++ = 0; /* min tx power */
475 *pos++ = local->oper_channel->max_power; /* max tx power */
477 /* 2. supported channels */
478 /* TODO: get this in reg domain format */
479 pos = skb_put(skb, 2 * sband->n_channels + 2);
480 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
481 *pos++ = 2 * sband->n_channels;
482 for (i = 0; i < sband->n_channels; i++) {
483 *pos++ = ieee80211_frequency_to_channel(
484 sband->channels[i].center_freq);
485 *pos++ = 1; /* one channel in the subband*/
489 /* if present, add any custom IEs that go before HT */
490 if (assoc_data->ie_len && assoc_data->ie) {
491 static const u8 before_ht[] = {
494 WLAN_EID_EXT_SUPP_RATES,
495 WLAN_EID_PWR_CAPABILITY,
496 WLAN_EID_SUPPORTED_CHANNELS,
499 WLAN_EID_RRM_ENABLED_CAPABILITIES,
500 WLAN_EID_MOBILITY_DOMAIN,
501 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
503 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
504 before_ht, ARRAY_SIZE(before_ht),
506 pos = skb_put(skb, noffset - offset);
507 memcpy(pos, assoc_data->ie + offset, noffset - offset);
511 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
512 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_operation_ie,
513 sband, local->oper_channel, ifmgd->ap_smps);
515 /* if present, add any custom non-vendor IEs that go after HT */
516 if (assoc_data->ie_len && assoc_data->ie) {
517 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
520 pos = skb_put(skb, noffset - offset);
521 memcpy(pos, assoc_data->ie + offset, noffset - offset);
525 if (assoc_data->wmm) {
526 if (assoc_data->uapsd) {
527 qos_info = ifmgd->uapsd_queues;
528 qos_info |= (ifmgd->uapsd_max_sp_len <<
529 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
534 pos = skb_put(skb, 9);
535 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
536 *pos++ = 7; /* len */
537 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
540 *pos++ = 2; /* WME */
541 *pos++ = 0; /* WME info */
542 *pos++ = 1; /* WME ver */
546 /* add any remaining custom (i.e. vendor specific here) IEs */
547 if (assoc_data->ie_len && assoc_data->ie) {
548 noffset = assoc_data->ie_len;
549 pos = skb_put(skb, noffset - offset);
550 memcpy(pos, assoc_data->ie + offset, noffset - offset);
553 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
554 ieee80211_tx_skb(sdata, skb);
557 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
558 const u8 *bssid, u16 stype,
559 u16 reason, bool send_frame,
562 struct ieee80211_local *local = sdata->local;
563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
565 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
568 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
569 mgmt->duration = 0; /* initialize only */
570 mgmt->seq_ctrl = 0; /* initialize only */
571 memcpy(mgmt->da, bssid, ETH_ALEN);
572 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
573 memcpy(mgmt->bssid, bssid, ETH_ALEN);
574 /* u.deauth.reason_code == u.disassoc.reason_code */
575 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
578 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
579 DEAUTH_DISASSOC_LEN);
583 skb_reserve(skb, local->hw.extra_tx_headroom);
586 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
587 mgmt, DEAUTH_DISASSOC_LEN);
589 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
590 IEEE80211_SKB_CB(skb)->flags |=
591 IEEE80211_TX_INTFL_DONT_ENCRYPT;
592 ieee80211_tx_skb(sdata, skb);
596 void ieee80211_send_pspoll(struct ieee80211_local *local,
597 struct ieee80211_sub_if_data *sdata)
599 struct ieee80211_pspoll *pspoll;
602 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
606 pspoll = (struct ieee80211_pspoll *) skb->data;
607 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
609 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
610 ieee80211_tx_skb(sdata, skb);
613 void ieee80211_send_nullfunc(struct ieee80211_local *local,
614 struct ieee80211_sub_if_data *sdata,
618 struct ieee80211_hdr_3addr *nullfunc;
619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
621 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
625 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
627 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
629 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
630 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
631 IEEE80211_STA_CONNECTION_POLL))
632 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
634 ieee80211_tx_skb(sdata, skb);
637 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
638 struct ieee80211_sub_if_data *sdata)
641 struct ieee80211_hdr *nullfunc;
644 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
647 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
651 skb_reserve(skb, local->hw.extra_tx_headroom);
653 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
654 memset(nullfunc, 0, 30);
655 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
656 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
657 nullfunc->frame_control = fc;
658 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
659 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
660 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
661 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
663 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
664 ieee80211_tx_skb(sdata, skb);
667 /* spectrum management related things */
668 static void ieee80211_chswitch_work(struct work_struct *work)
670 struct ieee80211_sub_if_data *sdata =
671 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
674 if (!ieee80211_sdata_running(sdata))
677 mutex_lock(&ifmgd->mtx);
678 if (!ifmgd->associated)
681 sdata->local->oper_channel = sdata->local->csa_channel;
682 if (!sdata->local->ops->channel_switch) {
683 /* call "hw_config" only if doing sw channel switch */
684 ieee80211_hw_config(sdata->local,
685 IEEE80211_CONF_CHANGE_CHANNEL);
687 /* update the device channel directly */
688 sdata->local->hw.conf.channel = sdata->local->oper_channel;
691 /* XXX: shouldn't really modify cfg80211-owned data! */
692 ifmgd->associated->channel = sdata->local->oper_channel;
694 ieee80211_wake_queues_by_reason(&sdata->local->hw,
695 IEEE80211_QUEUE_STOP_REASON_CSA);
697 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
698 mutex_unlock(&ifmgd->mtx);
701 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
703 struct ieee80211_sub_if_data *sdata;
704 struct ieee80211_if_managed *ifmgd;
706 sdata = vif_to_sdata(vif);
707 ifmgd = &sdata->u.mgd;
709 trace_api_chswitch_done(sdata, success);
712 * If the channel switch was not successful, stay
713 * around on the old channel. We currently lack
714 * good handling of this situation, possibly we
715 * should just drop the association.
717 sdata->local->csa_channel = sdata->local->oper_channel;
720 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
722 EXPORT_SYMBOL(ieee80211_chswitch_done);
724 static void ieee80211_chswitch_timer(unsigned long data)
726 struct ieee80211_sub_if_data *sdata =
727 (struct ieee80211_sub_if_data *) data;
728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
730 if (sdata->local->quiescing) {
731 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
735 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
738 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
739 struct ieee80211_channel_sw_ie *sw_elem,
740 struct ieee80211_bss *bss,
743 struct cfg80211_bss *cbss =
744 container_of((void *)bss, struct cfg80211_bss, priv);
745 struct ieee80211_channel *new_ch;
746 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
747 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
748 cbss->channel->band);
750 ASSERT_MGD_MTX(ifmgd);
752 if (!ifmgd->associated)
755 if (sdata->local->scanning)
758 /* Disregard subsequent beacons if we are already running a timer
761 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
764 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
765 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
768 sdata->local->csa_channel = new_ch;
770 if (sdata->local->ops->channel_switch) {
771 /* use driver's channel switch callback */
772 struct ieee80211_channel_switch ch_switch;
773 memset(&ch_switch, 0, sizeof(ch_switch));
774 ch_switch.timestamp = timestamp;
776 ch_switch.block_tx = true;
777 ieee80211_stop_queues_by_reason(&sdata->local->hw,
778 IEEE80211_QUEUE_STOP_REASON_CSA);
780 ch_switch.channel = new_ch;
781 ch_switch.count = sw_elem->count;
782 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
783 drv_channel_switch(sdata->local, &ch_switch);
787 /* channel switch handled in software */
788 if (sw_elem->count <= 1) {
789 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
792 ieee80211_stop_queues_by_reason(&sdata->local->hw,
793 IEEE80211_QUEUE_STOP_REASON_CSA);
794 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
795 mod_timer(&ifmgd->chswitch_timer,
797 msecs_to_jiffies(sw_elem->count *
798 cbss->beacon_interval));
802 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
803 u16 capab_info, u8 *pwr_constr_elem,
804 u8 pwr_constr_elem_len)
806 struct ieee80211_conf *conf = &sdata->local->hw.conf;
808 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
811 /* Power constraint IE length should be 1 octet */
812 if (pwr_constr_elem_len != 1)
815 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
816 (*pwr_constr_elem != sdata->local->power_constr_level)) {
817 sdata->local->power_constr_level = *pwr_constr_elem;
818 ieee80211_hw_config(sdata->local, 0);
822 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
824 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
825 struct ieee80211_local *local = sdata->local;
826 struct ieee80211_conf *conf = &local->hw.conf;
828 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
829 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
830 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
832 local->disable_dynamic_ps = false;
833 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
835 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
837 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
839 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
840 struct ieee80211_local *local = sdata->local;
841 struct ieee80211_conf *conf = &local->hw.conf;
843 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
844 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
845 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
847 local->disable_dynamic_ps = true;
848 conf->dynamic_ps_timeout = 0;
849 del_timer_sync(&local->dynamic_ps_timer);
850 ieee80211_queue_work(&local->hw,
851 &local->dynamic_ps_enable_work);
853 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
856 static void ieee80211_enable_ps(struct ieee80211_local *local,
857 struct ieee80211_sub_if_data *sdata)
859 struct ieee80211_conf *conf = &local->hw.conf;
862 * If we are scanning right now then the parameters will
863 * take effect when scan finishes.
868 if (conf->dynamic_ps_timeout > 0 &&
869 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
870 mod_timer(&local->dynamic_ps_timer, jiffies +
871 msecs_to_jiffies(conf->dynamic_ps_timeout));
873 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
874 ieee80211_send_nullfunc(local, sdata, 1);
876 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
877 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
880 conf->flags |= IEEE80211_CONF_PS;
881 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
885 static void ieee80211_change_ps(struct ieee80211_local *local)
887 struct ieee80211_conf *conf = &local->hw.conf;
889 if (local->ps_sdata) {
890 ieee80211_enable_ps(local, local->ps_sdata);
891 } else if (conf->flags & IEEE80211_CONF_PS) {
892 conf->flags &= ~IEEE80211_CONF_PS;
893 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
894 del_timer_sync(&local->dynamic_ps_timer);
895 cancel_work_sync(&local->dynamic_ps_enable_work);
899 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
901 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
902 struct sta_info *sta = NULL;
903 bool authorized = false;
911 if (!mgd->associated)
914 if (!mgd->associated->beacon_ies)
917 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
918 IEEE80211_STA_CONNECTION_POLL))
922 sta = sta_info_get(sdata, mgd->bssid);
924 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
930 /* need to hold RTNL or interface lock */
931 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
933 struct ieee80211_sub_if_data *sdata, *found = NULL;
937 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
938 local->ps_sdata = NULL;
942 if (!list_empty(&local->work_list)) {
943 local->ps_sdata = NULL;
947 list_for_each_entry(sdata, &local->interfaces, list) {
948 if (!ieee80211_sdata_running(sdata))
950 if (sdata->vif.type == NL80211_IFTYPE_AP) {
951 /* If an AP vif is found, then disable PS
952 * by setting the count to zero thereby setting
958 if (sdata->vif.type != NL80211_IFTYPE_STATION)
964 if (count == 1 && ieee80211_powersave_allowed(found)) {
965 struct ieee80211_conf *conf = &local->hw.conf;
969 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
971 beaconint_us = ieee80211_tu_to_usec(
972 found->vif.bss_conf.beacon_int);
974 timeout = local->dynamic_ps_forced_timeout;
977 * Go to full PSM if the user configures a very low
978 * latency requirement.
979 * The 2000 second value is there for compatibility
980 * until the PM_QOS_NETWORK_LATENCY is configured
983 if (latency > (1900 * USEC_PER_MSEC) &&
984 latency != (2000 * USEC_PER_SEC))
989 local->dynamic_ps_user_timeout = timeout;
990 if (!local->disable_dynamic_ps)
991 conf->dynamic_ps_timeout =
992 local->dynamic_ps_user_timeout;
994 if (beaconint_us > latency) {
995 local->ps_sdata = NULL;
997 struct ieee80211_bss *bss;
1001 bss = (void *)found->u.mgd.associated->priv;
1002 dtimper = bss->dtim_period;
1004 /* If the TIM IE is invalid, pretend the value is 1 */
1007 else if (dtimper > 1)
1008 maxslp = min_t(int, dtimper,
1009 latency / beaconint_us);
1011 local->hw.conf.max_sleep_period = maxslp;
1012 local->hw.conf.ps_dtim_period = dtimper;
1013 local->ps_sdata = found;
1016 local->ps_sdata = NULL;
1020 ieee80211_change_ps(local);
1023 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1025 struct ieee80211_local *local =
1026 container_of(work, struct ieee80211_local,
1027 dynamic_ps_disable_work);
1029 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1030 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1031 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1034 ieee80211_wake_queues_by_reason(&local->hw,
1035 IEEE80211_QUEUE_STOP_REASON_PS);
1038 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1040 struct ieee80211_local *local =
1041 container_of(work, struct ieee80211_local,
1042 dynamic_ps_enable_work);
1043 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1044 struct ieee80211_if_managed *ifmgd;
1045 unsigned long flags;
1048 /* can only happen when PS was just disabled anyway */
1052 ifmgd = &sdata->u.mgd;
1054 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1057 if (!local->disable_dynamic_ps &&
1058 local->hw.conf.dynamic_ps_timeout > 0) {
1059 /* don't enter PS if TX frames are pending */
1060 if (drv_tx_frames_pending(local)) {
1061 mod_timer(&local->dynamic_ps_timer, jiffies +
1063 local->hw.conf.dynamic_ps_timeout));
1068 * transmission can be stopped by others which leads to
1069 * dynamic_ps_timer expiry. Postpone the ps timer if it
1070 * is not the actual idle state.
1072 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1073 for (q = 0; q < local->hw.queues; q++) {
1074 if (local->queue_stop_reasons[q]) {
1075 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1077 mod_timer(&local->dynamic_ps_timer, jiffies +
1079 local->hw.conf.dynamic_ps_timeout));
1083 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1086 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1087 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1088 netif_tx_stop_all_queues(sdata->dev);
1090 if (drv_tx_frames_pending(local))
1091 mod_timer(&local->dynamic_ps_timer, jiffies +
1093 local->hw.conf.dynamic_ps_timeout));
1095 ieee80211_send_nullfunc(local, sdata, 1);
1096 /* Flush to get the tx status of nullfunc frame */
1097 drv_flush(local, false);
1101 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1102 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1103 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1104 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1105 local->hw.conf.flags |= IEEE80211_CONF_PS;
1106 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1109 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1110 netif_tx_wake_all_queues(sdata->dev);
1113 void ieee80211_dynamic_ps_timer(unsigned long data)
1115 struct ieee80211_local *local = (void *) data;
1117 if (local->quiescing || local->suspended)
1120 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1124 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
1125 struct ieee80211_sub_if_data *sdata,
1126 u8 *wmm_param, size_t wmm_param_len)
1128 struct ieee80211_tx_queue_params params;
1129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1132 u8 *pos, uapsd_queues = 0;
1134 if (!local->ops->conf_tx)
1137 if (local->hw.queues < IEEE80211_NUM_ACS)
1143 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1146 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1147 uapsd_queues = ifmgd->uapsd_queues;
1149 count = wmm_param[6] & 0x0f;
1150 if (count == ifmgd->wmm_last_param_set)
1152 ifmgd->wmm_last_param_set = count;
1154 pos = wmm_param + 8;
1155 left = wmm_param_len - 8;
1157 memset(¶ms, 0, sizeof(params));
1160 for (; left >= 4; left -= 4, pos += 4) {
1161 int aci = (pos[0] >> 5) & 0x03;
1162 int acm = (pos[0] >> 4) & 0x01;
1170 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1171 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1177 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1178 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1184 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1185 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1192 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1193 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1198 params.aifs = pos[0] & 0x0f;
1199 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1200 params.cw_min = ecw2cw(pos[1] & 0x0f);
1201 params.txop = get_unaligned_le16(pos + 2);
1202 params.uapsd = uapsd;
1204 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1205 wiphy_debug(local->hw.wiphy,
1206 "WMM queue=%d aci=%d acm=%d aifs=%d "
1207 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1209 params.aifs, params.cw_min, params.cw_max,
1210 params.txop, params.uapsd);
1212 sdata->tx_conf[queue] = params;
1213 if (drv_conf_tx(local, sdata, queue, ¶ms))
1214 wiphy_debug(local->hw.wiphy,
1215 "failed to set TX queue parameters for queue %d\n",
1219 /* enable WMM or activate new settings */
1220 sdata->vif.bss_conf.qos = true;
1223 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1225 lockdep_assert_held(&sdata->local->mtx);
1227 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1228 IEEE80211_STA_BEACON_POLL);
1229 ieee80211_run_deferred_scan(sdata->local);
1232 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1234 mutex_lock(&sdata->local->mtx);
1235 __ieee80211_stop_poll(sdata);
1236 mutex_unlock(&sdata->local->mtx);
1239 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1240 u16 capab, bool erp_valid, u8 erp)
1242 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1244 bool use_protection;
1245 bool use_short_preamble;
1246 bool use_short_slot;
1249 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1250 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1252 use_protection = false;
1253 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1256 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1257 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1258 use_short_slot = true;
1260 if (use_protection != bss_conf->use_cts_prot) {
1261 bss_conf->use_cts_prot = use_protection;
1262 changed |= BSS_CHANGED_ERP_CTS_PROT;
1265 if (use_short_preamble != bss_conf->use_short_preamble) {
1266 bss_conf->use_short_preamble = use_short_preamble;
1267 changed |= BSS_CHANGED_ERP_PREAMBLE;
1270 if (use_short_slot != bss_conf->use_short_slot) {
1271 bss_conf->use_short_slot = use_short_slot;
1272 changed |= BSS_CHANGED_ERP_SLOT;
1278 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1279 struct cfg80211_bss *cbss,
1280 u32 bss_info_changed)
1282 struct ieee80211_bss *bss = (void *)cbss->priv;
1283 struct ieee80211_local *local = sdata->local;
1284 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1286 bss_info_changed |= BSS_CHANGED_ASSOC;
1287 /* set timing information */
1288 bss_conf->beacon_int = cbss->beacon_interval;
1289 bss_conf->last_tsf = cbss->tsf;
1291 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1292 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1293 cbss->capability, bss->has_erp_value, bss->erp_value);
1295 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1296 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1298 sdata->u.mgd.associated = cbss;
1299 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1301 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1303 /* just to be sure */
1304 ieee80211_stop_poll(sdata);
1306 ieee80211_led_assoc(local, 1);
1308 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1309 bss_conf->dtim_period = bss->dtim_period;
1311 bss_conf->dtim_period = 0;
1313 bss_conf->assoc = 1;
1315 /* Tell the driver to monitor connection quality (if supported) */
1316 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1317 bss_conf->cqm_rssi_thold)
1318 bss_info_changed |= BSS_CHANGED_CQM;
1320 /* Enable ARP filtering */
1321 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1322 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1323 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1326 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1328 mutex_lock(&local->iflist_mtx);
1329 ieee80211_recalc_ps(local, -1);
1330 ieee80211_recalc_smps(local);
1331 mutex_unlock(&local->iflist_mtx);
1333 netif_tx_start_all_queues(sdata->dev);
1334 netif_carrier_on(sdata->dev);
1337 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1338 u16 stype, u16 reason, bool tx,
1341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1342 struct ieee80211_local *local = sdata->local;
1343 struct sta_info *sta;
1346 ASSERT_MGD_MTX(ifmgd);
1348 if (WARN_ON_ONCE(tx && !frame_buf))
1351 if (WARN_ON(!ifmgd->associated))
1354 ieee80211_stop_poll(sdata);
1356 ifmgd->associated = NULL;
1359 * we need to commit the associated = NULL change because the
1360 * scan code uses that to determine whether this iface should
1361 * go to/wake up from powersave or not -- and could otherwise
1362 * wake the queues erroneously.
1367 * Thus, we can only afterwards stop the queues -- to account
1368 * for the case where another CPU is finishing a scan at this
1369 * time -- we don't want the scan code to enable queues.
1372 netif_tx_stop_all_queues(sdata->dev);
1373 netif_carrier_off(sdata->dev);
1375 mutex_lock(&local->sta_mtx);
1376 sta = sta_info_get(sdata, ifmgd->bssid);
1378 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1379 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1381 mutex_unlock(&local->sta_mtx);
1383 /* deauthenticate/disassociate now */
1384 if (tx || frame_buf)
1385 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1386 reason, tx, frame_buf);
1388 /* flush out frame */
1390 drv_flush(local, false);
1392 /* clear bssid only after building the needed mgmt frames */
1393 memset(ifmgd->bssid, 0, ETH_ALEN);
1395 /* remove AP and TDLS peers */
1396 sta_info_flush(local, sdata);
1398 /* finally reset all BSS / config parameters */
1399 changed |= ieee80211_reset_erp_info(sdata);
1401 ieee80211_led_assoc(local, 0);
1402 changed |= BSS_CHANGED_ASSOC;
1403 sdata->vif.bss_conf.assoc = false;
1405 /* on the next assoc, re-program HT parameters */
1406 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1407 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1409 local->power_constr_level = 0;
1411 del_timer_sync(&local->dynamic_ps_timer);
1412 cancel_work_sync(&local->dynamic_ps_enable_work);
1414 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1415 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1416 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1418 local->ps_sdata = NULL;
1420 /* Disable ARP filtering */
1421 if (sdata->vif.bss_conf.arp_filter_enabled) {
1422 sdata->vif.bss_conf.arp_filter_enabled = false;
1423 changed |= BSS_CHANGED_ARP_FILTER;
1426 sdata->vif.bss_conf.qos = false;
1427 changed |= BSS_CHANGED_QOS;
1429 /* The BSSID (not really interesting) and HT changed */
1430 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1431 ieee80211_bss_info_change_notify(sdata, changed);
1433 /* channel(_type) changes are handled by ieee80211_hw_config */
1434 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1435 ieee80211_hw_config(local, 0);
1437 /* disassociated - set to defaults now */
1438 ieee80211_set_wmm_default(sdata, false);
1440 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1441 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1442 del_timer_sync(&sdata->u.mgd.timer);
1443 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1446 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1447 struct ieee80211_hdr *hdr)
1450 * We can postpone the mgd.timer whenever receiving unicast frames
1451 * from AP because we know that the connection is working both ways
1452 * at that time. But multicast frames (and hence also beacons) must
1453 * be ignored here, because we need to trigger the timer during
1454 * data idle periods for sending the periodic probe request to the
1455 * AP we're connected to.
1457 if (is_multicast_ether_addr(hdr->addr1))
1460 ieee80211_sta_reset_conn_monitor(sdata);
1463 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1465 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1466 struct ieee80211_local *local = sdata->local;
1468 mutex_lock(&local->mtx);
1469 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1470 IEEE80211_STA_CONNECTION_POLL))) {
1471 mutex_unlock(&local->mtx);
1475 __ieee80211_stop_poll(sdata);
1477 mutex_lock(&local->iflist_mtx);
1478 ieee80211_recalc_ps(local, -1);
1479 mutex_unlock(&local->iflist_mtx);
1481 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1485 * We've received a probe response, but are not sure whether
1486 * we have or will be receiving any beacons or data, so let's
1487 * schedule the timers again, just in case.
1489 ieee80211_sta_reset_beacon_monitor(sdata);
1491 mod_timer(&ifmgd->conn_mon_timer,
1492 round_jiffies_up(jiffies +
1493 IEEE80211_CONNECTION_IDLE_TIME));
1495 mutex_unlock(&local->mtx);
1498 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1499 struct ieee80211_hdr *hdr, bool ack)
1501 if (!ieee80211_is_data(hdr->frame_control))
1505 ieee80211_sta_reset_conn_monitor(sdata);
1507 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1508 sdata->u.mgd.probe_send_count > 0) {
1510 sdata->u.mgd.probe_send_count = 0;
1512 sdata->u.mgd.nullfunc_failed = true;
1513 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1517 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1521 u8 *dst = ifmgd->associated->bssid;
1522 u8 unicast_limit = max(1, max_probe_tries - 3);
1525 * Try sending broadcast probe requests for the last three
1526 * probe requests after the first ones failed since some
1527 * buggy APs only support broadcast probe requests.
1529 if (ifmgd->probe_send_count >= unicast_limit)
1533 * When the hardware reports an accurate Tx ACK status, it's
1534 * better to send a nullfunc frame instead of a probe request,
1535 * as it will kick us off the AP quickly if we aren't associated
1536 * anymore. The timeout will be reset if the frame is ACKed by
1539 ifmgd->probe_send_count++;
1541 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1542 ifmgd->nullfunc_failed = false;
1543 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1547 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1548 if (WARN_ON_ONCE(ssid == NULL))
1553 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1554 0, (u32) -1, true, false);
1557 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1558 run_again(ifmgd, ifmgd->probe_timeout);
1559 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1560 drv_flush(sdata->local, false);
1563 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1566 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1567 bool already = false;
1569 if (!ieee80211_sdata_running(sdata))
1572 mutex_lock(&ifmgd->mtx);
1574 if (!ifmgd->associated)
1577 mutex_lock(&sdata->local->mtx);
1579 if (sdata->local->tmp_channel || sdata->local->scanning) {
1580 mutex_unlock(&sdata->local->mtx);
1584 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1586 net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
1591 * The driver/our work has already reported this event or the
1592 * connection monitoring has kicked in and we have already sent
1593 * a probe request. Or maybe the AP died and the driver keeps
1594 * reporting until we disassociate...
1596 * In either case we have to ignore the current call to this
1597 * function (except for setting the correct probe reason bit)
1598 * because otherwise we would reset the timer every time and
1599 * never check whether we received a probe response!
1601 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1602 IEEE80211_STA_CONNECTION_POLL))
1606 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1608 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1610 mutex_unlock(&sdata->local->mtx);
1615 mutex_lock(&sdata->local->iflist_mtx);
1616 ieee80211_recalc_ps(sdata->local, -1);
1617 mutex_unlock(&sdata->local->iflist_mtx);
1619 ifmgd->probe_send_count = 0;
1620 ieee80211_mgd_probe_ap_send(sdata);
1622 mutex_unlock(&ifmgd->mtx);
1625 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1626 struct ieee80211_vif *vif)
1628 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1630 struct sk_buff *skb;
1634 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1637 ASSERT_MGD_MTX(ifmgd);
1639 if (!ifmgd->associated)
1642 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1643 if (WARN_ON_ONCE(ssid == NULL))
1648 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1649 (u32) -1, ssid + 2, ssid_len,
1654 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1656 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1658 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1659 struct ieee80211_local *local = sdata->local;
1661 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1663 mutex_lock(&ifmgd->mtx);
1664 if (!ifmgd->associated) {
1665 mutex_unlock(&ifmgd->mtx);
1669 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1671 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1672 sdata->name, bssid);
1674 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1675 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1677 mutex_unlock(&ifmgd->mtx);
1680 * must be outside lock due to cfg80211,
1681 * but that's not a problem.
1683 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
1685 mutex_lock(&local->mtx);
1686 ieee80211_recalc_idle(local);
1687 mutex_unlock(&local->mtx);
1690 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1692 struct ieee80211_sub_if_data *sdata =
1693 container_of(work, struct ieee80211_sub_if_data,
1694 u.mgd.beacon_connection_loss_work);
1695 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1696 struct sta_info *sta;
1698 if (ifmgd->associated) {
1700 sta = sta_info_get(sdata, ifmgd->bssid);
1702 sta->beacon_loss_count++;
1706 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1707 __ieee80211_connection_loss(sdata);
1709 ieee80211_mgd_probe_ap(sdata, true);
1712 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1714 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1715 struct ieee80211_hw *hw = &sdata->local->hw;
1717 trace_api_beacon_loss(sdata);
1719 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1720 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1722 EXPORT_SYMBOL(ieee80211_beacon_loss);
1724 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1726 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1727 struct ieee80211_hw *hw = &sdata->local->hw;
1729 trace_api_connection_loss(sdata);
1731 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1732 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1734 EXPORT_SYMBOL(ieee80211_connection_loss);
1737 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1740 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1742 lockdep_assert_held(&sdata->u.mgd.mtx);
1745 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1747 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1748 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1751 cfg80211_put_bss(auth_data->bss);
1753 sdata->u.mgd.auth_data = NULL;
1756 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1757 struct ieee80211_mgmt *mgmt, size_t len)
1759 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1761 struct ieee802_11_elems elems;
1763 pos = mgmt->u.auth.variable;
1764 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1765 if (!elems.challenge)
1767 auth_data->expected_transaction = 4;
1768 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1769 elems.challenge - 2, elems.challenge_len + 2,
1770 auth_data->bss->bssid, auth_data->bss->bssid,
1771 auth_data->key, auth_data->key_len,
1772 auth_data->key_idx);
1775 static enum rx_mgmt_action __must_check
1776 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1777 struct ieee80211_mgmt *mgmt, size_t len)
1779 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1781 u16 auth_alg, auth_transaction, status_code;
1782 struct sta_info *sta;
1784 lockdep_assert_held(&ifmgd->mtx);
1787 return RX_MGMT_NONE;
1789 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1790 return RX_MGMT_NONE;
1792 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1794 if (!ether_addr_equal(bssid, mgmt->bssid))
1795 return RX_MGMT_NONE;
1797 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1798 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1799 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1801 if (auth_alg != ifmgd->auth_data->algorithm ||
1802 auth_transaction != ifmgd->auth_data->expected_transaction)
1803 return RX_MGMT_NONE;
1805 if (status_code != WLAN_STATUS_SUCCESS) {
1806 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1807 sdata->name, mgmt->sa, status_code);
1811 switch (ifmgd->auth_data->algorithm) {
1812 case WLAN_AUTH_OPEN:
1813 case WLAN_AUTH_LEAP:
1816 case WLAN_AUTH_SHARED_KEY:
1817 if (ifmgd->auth_data->expected_transaction != 4) {
1818 ieee80211_auth_challenge(sdata, mgmt, len);
1819 /* need another frame */
1820 return RX_MGMT_NONE;
1824 WARN_ONCE(1, "invalid auth alg %d",
1825 ifmgd->auth_data->algorithm);
1826 return RX_MGMT_NONE;
1829 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1831 ifmgd->auth_data->done = true;
1832 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1833 run_again(ifmgd, ifmgd->auth_data->timeout);
1835 /* move station state to auth */
1836 mutex_lock(&sdata->local->sta_mtx);
1837 sta = sta_info_get(sdata, bssid);
1839 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1842 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1843 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1844 sdata->name, bssid);
1847 mutex_unlock(&sdata->local->sta_mtx);
1849 return RX_MGMT_CFG80211_RX_AUTH;
1851 mutex_unlock(&sdata->local->sta_mtx);
1852 /* ignore frame -- wait for timeout */
1853 return RX_MGMT_NONE;
1857 static enum rx_mgmt_action __must_check
1858 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1859 struct ieee80211_mgmt *mgmt, size_t len)
1861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1862 const u8 *bssid = NULL;
1865 lockdep_assert_held(&ifmgd->mtx);
1868 return RX_MGMT_NONE;
1870 if (!ifmgd->associated ||
1871 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1872 return RX_MGMT_NONE;
1874 bssid = ifmgd->associated->bssid;
1876 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1878 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1879 sdata->name, bssid, reason_code);
1881 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1883 mutex_lock(&sdata->local->mtx);
1884 ieee80211_recalc_idle(sdata->local);
1885 mutex_unlock(&sdata->local->mtx);
1887 return RX_MGMT_CFG80211_DEAUTH;
1891 static enum rx_mgmt_action __must_check
1892 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1893 struct ieee80211_mgmt *mgmt, size_t len)
1895 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1898 lockdep_assert_held(&ifmgd->mtx);
1901 return RX_MGMT_NONE;
1903 if (!ifmgd->associated ||
1904 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1905 return RX_MGMT_NONE;
1907 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1909 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1910 sdata->name, mgmt->sa, reason_code);
1912 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1914 mutex_lock(&sdata->local->mtx);
1915 ieee80211_recalc_idle(sdata->local);
1916 mutex_unlock(&sdata->local->mtx);
1918 return RX_MGMT_CFG80211_DISASSOC;
1921 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1922 u8 *supp_rates, unsigned int supp_rates_len,
1923 u32 *rates, u32 *basic_rates,
1924 bool *have_higher_than_11mbit,
1925 int *min_rate, int *min_rate_index)
1929 for (i = 0; i < supp_rates_len; i++) {
1930 int rate = (supp_rates[i] & 0x7f) * 5;
1931 bool is_basic = !!(supp_rates[i] & 0x80);
1934 *have_higher_than_11mbit = true;
1937 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1938 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1940 * Note: Even through the membership selector and the basic
1941 * rate flag share the same bit, they are not exactly
1944 if (!!(supp_rates[i] & 0x80) &&
1945 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1948 for (j = 0; j < sband->n_bitrates; j++) {
1949 if (sband->bitrates[j].bitrate == rate) {
1952 *basic_rates |= BIT(j);
1953 if (rate < *min_rate) {
1955 *min_rate_index = j;
1963 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1966 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1968 lockdep_assert_held(&sdata->u.mgd.mtx);
1971 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1973 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1974 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1978 sdata->u.mgd.assoc_data = NULL;
1981 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1982 struct cfg80211_bss *cbss,
1983 struct ieee80211_mgmt *mgmt, size_t len)
1985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1986 struct ieee80211_local *local = sdata->local;
1987 struct ieee80211_supported_band *sband;
1988 struct sta_info *sta;
1990 u16 capab_info, aid;
1991 struct ieee802_11_elems elems;
1992 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1996 /* AssocResp and ReassocResp have identical structure */
1998 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1999 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2001 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2003 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2005 aid &= ~(BIT(15) | BIT(14));
2007 ifmgd->broken_ap = false;
2009 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2011 "%s: invalid AID value %d (out of range), turn off PS\n",
2014 ifmgd->broken_ap = true;
2017 pos = mgmt->u.assoc_resp.variable;
2018 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2020 if (!elems.supp_rates) {
2021 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2028 mutex_lock(&sdata->local->sta_mtx);
2030 * station info was already allocated and inserted before
2031 * the association and should be available to us
2033 sta = sta_info_get(sdata, cbss->bssid);
2034 if (WARN_ON(!sta)) {
2035 mutex_unlock(&sdata->local->sta_mtx);
2039 sband = local->hw.wiphy->bands[local->oper_channel->band];
2041 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2042 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2043 elems.ht_cap_elem, &sta->sta.ht_cap);
2045 sta->supports_40mhz =
2046 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2048 rate_control_rate_init(sta);
2050 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2051 set_sta_flag(sta, WLAN_STA_MFP);
2053 if (elems.wmm_param)
2054 set_sta_flag(sta, WLAN_STA_WME);
2056 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2058 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2059 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2060 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2063 "%s: failed to move station %pM to desired state\n",
2064 sdata->name, sta->sta.addr);
2065 WARN_ON(__sta_info_destroy(sta));
2066 mutex_unlock(&sdata->local->sta_mtx);
2070 mutex_unlock(&sdata->local->sta_mtx);
2073 * Always handle WMM once after association regardless
2074 * of the first value the AP uses. Setting -1 here has
2075 * that effect because the AP values is an unsigned
2078 ifmgd->wmm_last_param_set = -1;
2080 if (elems.wmm_param)
2081 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2082 elems.wmm_param_len);
2084 ieee80211_set_wmm_default(sdata, false);
2085 changed |= BSS_CHANGED_QOS;
2087 if (elems.ht_operation && elems.wmm_param &&
2088 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2089 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2090 cbss->bssid, false);
2092 /* set AID and assoc capability,
2093 * ieee80211_set_associated() will tell the driver */
2094 bss_conf->aid = aid;
2095 bss_conf->assoc_capability = capab_info;
2096 ieee80211_set_associated(sdata, cbss, changed);
2099 * If we're using 4-addr mode, let the AP know that we're
2100 * doing so, so that it can create the STA VLAN on its side
2102 if (ifmgd->use_4addr)
2103 ieee80211_send_4addr_nullfunc(local, sdata);
2106 * Start timer to probe the connection to the AP now.
2107 * Also start the timer that will detect beacon loss.
2109 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2110 ieee80211_sta_reset_beacon_monitor(sdata);
2115 static enum rx_mgmt_action __must_check
2116 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2117 struct ieee80211_mgmt *mgmt, size_t len,
2118 struct cfg80211_bss **bss)
2120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2121 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2122 u16 capab_info, status_code, aid;
2123 struct ieee802_11_elems elems;
2127 lockdep_assert_held(&ifmgd->mtx);
2130 return RX_MGMT_NONE;
2131 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2132 return RX_MGMT_NONE;
2135 * AssocResp and ReassocResp have identical structure, so process both
2136 * of them in this function.
2140 return RX_MGMT_NONE;
2142 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2143 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2144 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2145 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2147 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2148 "status=%d aid=%d)\n",
2149 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2150 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2152 pos = mgmt->u.assoc_resp.variable;
2153 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2155 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2156 elems.timeout_int && elems.timeout_int_len == 5 &&
2157 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2159 tu = get_unaligned_le32(elems.timeout_int + 1);
2160 ms = tu * 1024 / 1000;
2161 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2162 "comeback duration %u TU (%u ms)\n",
2163 sdata->name, mgmt->sa, tu, ms);
2164 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2165 if (ms > IEEE80211_ASSOC_TIMEOUT)
2166 run_again(ifmgd, assoc_data->timeout);
2167 return RX_MGMT_NONE;
2170 *bss = assoc_data->bss;
2172 if (status_code != WLAN_STATUS_SUCCESS) {
2173 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2174 sdata->name, mgmt->sa, status_code);
2175 ieee80211_destroy_assoc_data(sdata, false);
2177 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2178 /* oops -- internal error -- send timeout for now */
2179 ieee80211_destroy_assoc_data(sdata, false);
2180 cfg80211_put_bss(*bss);
2181 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2183 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2186 * destroy assoc_data afterwards, as otherwise an idle
2187 * recalc after assoc_data is NULL but before associated
2188 * is set can cause the interface to go idle
2190 ieee80211_destroy_assoc_data(sdata, true);
2193 return RX_MGMT_CFG80211_RX_ASSOC;
2195 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2196 struct ieee80211_mgmt *mgmt,
2198 struct ieee80211_rx_status *rx_status,
2199 struct ieee802_11_elems *elems,
2202 struct ieee80211_local *local = sdata->local;
2204 struct ieee80211_bss *bss;
2205 struct ieee80211_channel *channel;
2206 bool need_ps = false;
2208 if (sdata->u.mgd.associated &&
2209 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
2210 bss = (void *)sdata->u.mgd.associated->priv;
2211 /* not previously set so we may need to recalc */
2212 need_ps = !bss->dtim_period;
2215 if (elems->ds_params && elems->ds_params_len == 1)
2216 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2219 freq = rx_status->freq;
2221 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2223 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2226 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2229 ieee80211_rx_bss_put(local, bss);
2231 if (!sdata->u.mgd.associated)
2235 mutex_lock(&local->iflist_mtx);
2236 ieee80211_recalc_ps(local, -1);
2237 mutex_unlock(&local->iflist_mtx);
2240 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
2241 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
2243 struct ieee80211_channel_sw_ie *sw_elem =
2244 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
2245 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2246 bss, rx_status->mactime);
2251 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2252 struct sk_buff *skb)
2254 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2255 struct ieee80211_if_managed *ifmgd;
2256 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2257 size_t baselen, len = skb->len;
2258 struct ieee802_11_elems elems;
2260 ifmgd = &sdata->u.mgd;
2262 ASSERT_MGD_MTX(ifmgd);
2264 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2265 return; /* ignore ProbeResp to foreign address */
2267 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2271 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2274 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2276 if (ifmgd->associated &&
2277 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2278 ieee80211_reset_ap_probe(sdata);
2280 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2281 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2282 /* got probe response, continue with auth */
2283 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2284 ifmgd->auth_data->tries = 0;
2285 ifmgd->auth_data->timeout = jiffies;
2286 run_again(ifmgd, ifmgd->auth_data->timeout);
2291 * This is the canonical list of information elements we care about,
2292 * the filter code also gives us all changes to the Microsoft OUI
2293 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2295 * We implement beacon filtering in software since that means we can
2296 * avoid processing the frame here and in cfg80211, and userspace
2297 * will not be able to tell whether the hardware supports it or not.
2299 * XXX: This list needs to be dynamic -- userspace needs to be able to
2300 * add items it requires. It also needs to be able to tell us to
2301 * look out for other vendor IEs.
2303 static const u64 care_about_ies =
2304 (1ULL << WLAN_EID_COUNTRY) |
2305 (1ULL << WLAN_EID_ERP_INFO) |
2306 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2307 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2308 (1ULL << WLAN_EID_HT_CAPABILITY) |
2309 (1ULL << WLAN_EID_HT_OPERATION);
2311 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2312 struct ieee80211_mgmt *mgmt,
2314 struct ieee80211_rx_status *rx_status)
2316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2317 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2319 struct ieee802_11_elems elems;
2320 struct ieee80211_local *local = sdata->local;
2322 bool erp_valid, directed_tim = false;
2327 lockdep_assert_held(&ifmgd->mtx);
2329 /* Process beacon from the current BSS */
2330 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2334 if (rx_status->freq != local->hw.conf.channel->center_freq)
2337 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2338 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2339 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2340 len - baselen, &elems);
2342 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2344 ifmgd->assoc_data->have_beacon = true;
2345 ifmgd->assoc_data->sent_assoc = false;
2346 /* continue assoc process */
2347 ifmgd->assoc_data->timeout = jiffies;
2348 run_again(ifmgd, ifmgd->assoc_data->timeout);
2352 if (!ifmgd->associated ||
2353 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2355 bssid = ifmgd->associated->bssid;
2357 /* Track average RSSI from the Beacon frames of the current AP */
2358 ifmgd->last_beacon_signal = rx_status->signal;
2359 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2360 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2361 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2362 ifmgd->last_cqm_event_signal = 0;
2363 ifmgd->count_beacon_signal = 1;
2364 ifmgd->last_ave_beacon_signal = 0;
2366 ifmgd->ave_beacon_signal =
2367 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2368 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2369 ifmgd->ave_beacon_signal) / 16;
2370 ifmgd->count_beacon_signal++;
2373 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2374 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2375 int sig = ifmgd->ave_beacon_signal;
2376 int last_sig = ifmgd->last_ave_beacon_signal;
2379 * if signal crosses either of the boundaries, invoke callback
2380 * with appropriate parameters
2382 if (sig > ifmgd->rssi_max_thold &&
2383 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2384 ifmgd->last_ave_beacon_signal = sig;
2385 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2386 } else if (sig < ifmgd->rssi_min_thold &&
2387 (last_sig >= ifmgd->rssi_max_thold ||
2389 ifmgd->last_ave_beacon_signal = sig;
2390 drv_rssi_callback(local, RSSI_EVENT_LOW);
2394 if (bss_conf->cqm_rssi_thold &&
2395 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2396 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2397 int sig = ifmgd->ave_beacon_signal / 16;
2398 int last_event = ifmgd->last_cqm_event_signal;
2399 int thold = bss_conf->cqm_rssi_thold;
2400 int hyst = bss_conf->cqm_rssi_hyst;
2402 (last_event == 0 || sig < last_event - hyst)) {
2403 ifmgd->last_cqm_event_signal = sig;
2404 ieee80211_cqm_rssi_notify(
2406 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2408 } else if (sig > thold &&
2409 (last_event == 0 || sig > last_event + hyst)) {
2410 ifmgd->last_cqm_event_signal = sig;
2411 ieee80211_cqm_rssi_notify(
2413 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2418 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2419 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2420 net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
2423 mutex_lock(&local->mtx);
2424 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2425 ieee80211_run_deferred_scan(local);
2426 mutex_unlock(&local->mtx);
2428 mutex_lock(&local->iflist_mtx);
2429 ieee80211_recalc_ps(local, -1);
2430 mutex_unlock(&local->iflist_mtx);
2434 * Push the beacon loss detection into the future since
2435 * we are processing a beacon from the AP just now.
2437 ieee80211_sta_reset_beacon_monitor(sdata);
2439 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2440 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2441 len - baselen, &elems,
2442 care_about_ies, ncrc);
2444 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2445 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2448 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
2449 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2452 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2453 elems.wmm_param_len);
2456 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2458 if (local->hw.conf.dynamic_ps_timeout > 0) {
2459 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2460 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2461 ieee80211_hw_config(local,
2462 IEEE80211_CONF_CHANGE_PS);
2464 ieee80211_send_nullfunc(local, sdata, 0);
2465 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2466 local->pspolling = true;
2469 * Here is assumed that the driver will be
2470 * able to send ps-poll frame and receive a
2471 * response even though power save mode is
2472 * enabled, but some drivers might require
2473 * to disable power save here. This needs
2474 * to be investigated.
2476 ieee80211_send_pspoll(local, sdata);
2481 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2483 ifmgd->beacon_crc = ncrc;
2484 ifmgd->beacon_crc_valid = true;
2486 if (elems.erp_info && elems.erp_info_len >= 1) {
2488 erp_value = elems.erp_info[0];
2492 changed |= ieee80211_handle_bss_capability(sdata,
2493 le16_to_cpu(mgmt->u.beacon.capab_info),
2494 erp_valid, erp_value);
2497 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
2498 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
2499 struct ieee80211_supported_band *sband;
2501 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2503 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2507 /* Note: country IE parsing is done for us by cfg80211 */
2508 if (elems.country_elem) {
2509 /* TODO: IBSS also needs this */
2510 if (elems.pwr_constr_elem)
2511 ieee80211_handle_pwr_constr(sdata,
2512 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2513 elems.pwr_constr_elem,
2514 elems.pwr_constr_elem_len);
2517 ieee80211_bss_info_change_notify(sdata, changed);
2520 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2521 struct sk_buff *skb)
2523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2524 struct ieee80211_rx_status *rx_status;
2525 struct ieee80211_mgmt *mgmt;
2526 struct cfg80211_bss *bss = NULL;
2527 enum rx_mgmt_action rma = RX_MGMT_NONE;
2530 rx_status = (struct ieee80211_rx_status *) skb->cb;
2531 mgmt = (struct ieee80211_mgmt *) skb->data;
2532 fc = le16_to_cpu(mgmt->frame_control);
2534 mutex_lock(&ifmgd->mtx);
2536 switch (fc & IEEE80211_FCTL_STYPE) {
2537 case IEEE80211_STYPE_BEACON:
2538 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2540 case IEEE80211_STYPE_PROBE_RESP:
2541 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2543 case IEEE80211_STYPE_AUTH:
2544 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2546 case IEEE80211_STYPE_DEAUTH:
2547 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2549 case IEEE80211_STYPE_DISASSOC:
2550 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2552 case IEEE80211_STYPE_ASSOC_RESP:
2553 case IEEE80211_STYPE_REASSOC_RESP:
2554 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2556 case IEEE80211_STYPE_ACTION:
2557 switch (mgmt->u.action.category) {
2558 case WLAN_CATEGORY_SPECTRUM_MGMT:
2559 ieee80211_sta_process_chanswitch(sdata,
2560 &mgmt->u.action.u.chan_switch.sw_elem,
2561 (void *)ifmgd->associated->priv,
2562 rx_status->mactime);
2566 mutex_unlock(&ifmgd->mtx);
2572 case RX_MGMT_CFG80211_DEAUTH:
2573 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2575 case RX_MGMT_CFG80211_DISASSOC:
2576 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2578 case RX_MGMT_CFG80211_RX_AUTH:
2579 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2581 case RX_MGMT_CFG80211_RX_ASSOC:
2582 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2584 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2585 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2588 WARN(1, "unexpected: %d", rma);
2592 static void ieee80211_sta_timer(unsigned long data)
2594 struct ieee80211_sub_if_data *sdata =
2595 (struct ieee80211_sub_if_data *) data;
2596 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2597 struct ieee80211_local *local = sdata->local;
2599 if (local->quiescing) {
2600 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2604 ieee80211_queue_work(&local->hw, &sdata->work);
2607 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2608 u8 *bssid, u8 reason)
2610 struct ieee80211_local *local = sdata->local;
2611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2612 u8 frame_buf[DEAUTH_DISASSOC_LEN];
2614 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2616 mutex_unlock(&ifmgd->mtx);
2619 * must be outside lock due to cfg80211,
2620 * but that's not a problem.
2622 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
2624 mutex_lock(&local->mtx);
2625 ieee80211_recalc_idle(local);
2626 mutex_unlock(&local->mtx);
2628 mutex_lock(&ifmgd->mtx);
2631 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2633 struct ieee80211_local *local = sdata->local;
2634 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2635 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2637 lockdep_assert_held(&ifmgd->mtx);
2639 if (WARN_ON_ONCE(!auth_data))
2644 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2645 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2646 sdata->name, auth_data->bss->bssid);
2649 * Most likely AP is not in the range so remove the
2650 * bss struct for that AP.
2652 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2657 if (auth_data->bss->proberesp_ies) {
2658 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2659 sdata->name, auth_data->bss->bssid, auth_data->tries,
2660 IEEE80211_AUTH_MAX_TRIES);
2662 auth_data->expected_transaction = 2;
2663 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2664 auth_data->ie, auth_data->ie_len,
2665 auth_data->bss->bssid,
2666 auth_data->bss->bssid, NULL, 0, 0);
2670 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2671 sdata->name, auth_data->bss->bssid, auth_data->tries,
2672 IEEE80211_AUTH_MAX_TRIES);
2674 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2678 * Direct probe is sent to broadcast address as some APs
2679 * will not answer to direct packet in unassociated state.
2681 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2682 NULL, 0, (u32) -1, true, false);
2685 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2686 run_again(ifmgd, auth_data->timeout);
2691 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2693 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2694 struct ieee80211_local *local = sdata->local;
2696 lockdep_assert_held(&sdata->u.mgd.mtx);
2698 assoc_data->tries++;
2699 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2700 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2701 sdata->name, assoc_data->bss->bssid);
2704 * Most likely AP is not in the range so remove the
2705 * bss struct for that AP.
2707 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2712 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2713 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2714 IEEE80211_ASSOC_MAX_TRIES);
2715 ieee80211_send_assoc(sdata);
2717 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2718 run_again(&sdata->u.mgd, assoc_data->timeout);
2723 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2725 struct ieee80211_local *local = sdata->local;
2726 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2728 mutex_lock(&ifmgd->mtx);
2730 if (ifmgd->auth_data &&
2731 time_after(jiffies, ifmgd->auth_data->timeout)) {
2732 if (ifmgd->auth_data->done) {
2734 * ok ... we waited for assoc but userspace didn't,
2735 * so let's just kill the auth data
2737 ieee80211_destroy_auth_data(sdata, false);
2738 } else if (ieee80211_probe_auth(sdata)) {
2741 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2743 ieee80211_destroy_auth_data(sdata, false);
2745 mutex_unlock(&ifmgd->mtx);
2746 cfg80211_send_auth_timeout(sdata->dev, bssid);
2747 mutex_lock(&ifmgd->mtx);
2749 } else if (ifmgd->auth_data)
2750 run_again(ifmgd, ifmgd->auth_data->timeout);
2752 if (ifmgd->assoc_data &&
2753 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2754 if (!ifmgd->assoc_data->have_beacon ||
2755 ieee80211_do_assoc(sdata)) {
2758 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2760 ieee80211_destroy_assoc_data(sdata, false);
2762 mutex_unlock(&ifmgd->mtx);
2763 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2764 mutex_lock(&ifmgd->mtx);
2766 } else if (ifmgd->assoc_data)
2767 run_again(ifmgd, ifmgd->assoc_data->timeout);
2769 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2770 IEEE80211_STA_CONNECTION_POLL) &&
2771 ifmgd->associated) {
2775 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2777 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2778 max_tries = max_nullfunc_tries;
2780 max_tries = max_probe_tries;
2782 /* ACK received for nullfunc probing frame */
2783 if (!ifmgd->probe_send_count)
2784 ieee80211_reset_ap_probe(sdata);
2785 else if (ifmgd->nullfunc_failed) {
2786 if (ifmgd->probe_send_count < max_tries) {
2787 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2788 wiphy_debug(local->hw.wiphy,
2789 "%s: No ack for nullfunc frame to"
2790 " AP %pM, try %d/%i\n",
2792 ifmgd->probe_send_count, max_tries);
2794 ieee80211_mgd_probe_ap_send(sdata);
2796 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2797 wiphy_debug(local->hw.wiphy,
2798 "%s: No ack for nullfunc frame to"
2799 " AP %pM, disconnecting.\n",
2800 sdata->name, bssid);
2802 ieee80211_sta_connection_lost(sdata, bssid,
2803 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2805 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2806 run_again(ifmgd, ifmgd->probe_timeout);
2807 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2808 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2809 wiphy_debug(local->hw.wiphy,
2810 "%s: Failed to send nullfunc to AP %pM"
2811 " after %dms, disconnecting.\n",
2813 bssid, probe_wait_ms);
2815 ieee80211_sta_connection_lost(sdata, bssid,
2816 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2817 } else if (ifmgd->probe_send_count < max_tries) {
2818 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2819 wiphy_debug(local->hw.wiphy,
2820 "%s: No probe response from AP %pM"
2821 " after %dms, try %d/%i\n",
2823 bssid, probe_wait_ms,
2824 ifmgd->probe_send_count, max_tries);
2826 ieee80211_mgd_probe_ap_send(sdata);
2829 * We actually lost the connection ... or did we?
2832 wiphy_debug(local->hw.wiphy,
2833 "%s: No probe response from AP %pM"
2834 " after %dms, disconnecting.\n",
2836 bssid, probe_wait_ms);
2838 ieee80211_sta_connection_lost(sdata, bssid,
2839 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2843 mutex_unlock(&ifmgd->mtx);
2845 mutex_lock(&local->mtx);
2846 ieee80211_recalc_idle(local);
2847 mutex_unlock(&local->mtx);
2850 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2852 struct ieee80211_sub_if_data *sdata =
2853 (struct ieee80211_sub_if_data *) data;
2854 struct ieee80211_local *local = sdata->local;
2856 if (local->quiescing)
2859 ieee80211_queue_work(&sdata->local->hw,
2860 &sdata->u.mgd.beacon_connection_loss_work);
2863 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2865 struct ieee80211_sub_if_data *sdata =
2866 (struct ieee80211_sub_if_data *) data;
2867 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2868 struct ieee80211_local *local = sdata->local;
2870 if (local->quiescing)
2873 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2876 static void ieee80211_sta_monitor_work(struct work_struct *work)
2878 struct ieee80211_sub_if_data *sdata =
2879 container_of(work, struct ieee80211_sub_if_data,
2880 u.mgd.monitor_work);
2882 ieee80211_mgd_probe_ap(sdata, false);
2885 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2889 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2890 __ieee80211_stop_poll(sdata);
2892 /* let's probe the connection once */
2893 flags = sdata->local->hw.flags;
2894 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2895 ieee80211_queue_work(&sdata->local->hw,
2896 &sdata->u.mgd.monitor_work);
2897 /* and do all the other regular work too */
2898 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2903 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2905 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2908 * we need to use atomic bitops for the running bits
2909 * only because both timers might fire at the same
2910 * time -- the code here is properly synchronised.
2913 cancel_work_sync(&ifmgd->request_smps_work);
2915 cancel_work_sync(&ifmgd->monitor_work);
2916 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
2917 if (del_timer_sync(&ifmgd->timer))
2918 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2920 cancel_work_sync(&ifmgd->chswitch_work);
2921 if (del_timer_sync(&ifmgd->chswitch_timer))
2922 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2924 /* these will just be re-established on connection */
2925 del_timer_sync(&ifmgd->conn_mon_timer);
2926 del_timer_sync(&ifmgd->bcn_mon_timer);
2929 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2933 if (!ifmgd->associated)
2936 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2937 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2938 mutex_lock(&ifmgd->mtx);
2939 if (ifmgd->associated) {
2940 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2941 wiphy_debug(sdata->local->hw.wiphy,
2942 "%s: driver requested disconnect after resume.\n",
2945 ieee80211_sta_connection_lost(sdata,
2946 ifmgd->associated->bssid,
2947 WLAN_REASON_UNSPECIFIED);
2948 mutex_unlock(&ifmgd->mtx);
2951 mutex_unlock(&ifmgd->mtx);
2954 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2955 add_timer(&ifmgd->timer);
2956 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2957 add_timer(&ifmgd->chswitch_timer);
2958 ieee80211_sta_reset_beacon_monitor(sdata);
2960 mutex_lock(&sdata->local->mtx);
2961 ieee80211_restart_sta_timer(sdata);
2962 mutex_unlock(&sdata->local->mtx);
2966 /* interface setup */
2967 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2969 struct ieee80211_if_managed *ifmgd;
2971 ifmgd = &sdata->u.mgd;
2972 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2973 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2974 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2975 ieee80211_beacon_connection_loss_work);
2976 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
2977 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2978 (unsigned long) sdata);
2979 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2980 (unsigned long) sdata);
2981 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2982 (unsigned long) sdata);
2983 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2984 (unsigned long) sdata);
2987 ifmgd->powersave = sdata->wdev.ps;
2988 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2989 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
2991 mutex_init(&ifmgd->mtx);
2993 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2994 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2996 ifmgd->req_smps = IEEE80211_SMPS_OFF;
2999 /* scan finished notification */
3000 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3002 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
3004 /* Restart STA timers */
3006 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3007 ieee80211_restart_sta_timer(sdata);
3011 int ieee80211_max_network_latency(struct notifier_block *nb,
3012 unsigned long data, void *dummy)
3014 s32 latency_usec = (s32) data;
3015 struct ieee80211_local *local =
3016 container_of(nb, struct ieee80211_local,
3017 network_latency_notifier);
3019 mutex_lock(&local->iflist_mtx);
3020 ieee80211_recalc_ps(local, latency_usec);
3021 mutex_unlock(&local->iflist_mtx);
3026 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3027 struct cfg80211_bss *cbss, bool assoc)
3029 struct ieee80211_local *local = sdata->local;
3030 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3031 struct ieee80211_bss *bss = (void *)cbss->priv;
3032 struct sta_info *sta;
3033 bool have_sta = false;
3036 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3037 const u8 *ht_oper_ie;
3038 const struct ieee80211_ht_operation *ht_oper = NULL;
3039 struct ieee80211_supported_band *sband;
3041 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3046 have_sta = sta_info_get(sdata, cbss->bssid);
3051 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3056 mutex_lock(&local->mtx);
3057 ieee80211_recalc_idle(sdata->local);
3058 mutex_unlock(&local->mtx);
3060 /* switch to the right channel */
3061 sband = local->hw.wiphy->bands[cbss->channel->band];
3063 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3065 if (sband->ht_cap.ht_supported) {
3066 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3067 cbss->information_elements,
3068 cbss->len_information_elements);
3069 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3070 ht_oper = (void *)(ht_oper_ie + 2);
3074 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3075 cbss->channel->band);
3076 /* check that channel matches the right operating channel */
3077 if (cbss->channel->center_freq != ht_cfreq) {
3079 * It's possible that some APs are confused here;
3080 * Netgear WNDR3700 sometimes reports 4 higher than
3081 * the actual channel in association responses, but
3082 * since we look at probe response/beacon data here
3086 "%s: Wrong control channel: center-freq: %d"
3087 " ht-cfreq: %d ht->primary_chan: %d"
3088 " band: %d. Disabling HT.\n",
3089 sdata->name, cbss->channel->center_freq,
3090 ht_cfreq, ht_oper->primary_chan,
3091 cbss->channel->band);
3097 channel_type = NL80211_CHAN_HT20;
3099 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3100 switch (ht_oper->ht_param &
3101 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3102 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3103 channel_type = NL80211_CHAN_HT40PLUS;
3105 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3106 channel_type = NL80211_CHAN_HT40MINUS;
3112 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3113 /* can only fail due to HT40+/- mismatch */
3114 channel_type = NL80211_CHAN_HT20;
3116 "%s: disabling 40 MHz due to multi-vif mismatch\n",
3118 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3119 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3123 local->oper_channel = cbss->channel;
3124 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3127 u32 rates = 0, basic_rates = 0;
3128 bool have_higher_than_11mbit;
3129 int min_rate = INT_MAX, min_rate_index = -1;
3131 ieee80211_get_rates(sband, bss->supp_rates,
3132 bss->supp_rates_len,
3133 &rates, &basic_rates,
3134 &have_higher_than_11mbit,
3135 &min_rate, &min_rate_index);
3138 * This used to be a workaround for basic rates missing
3139 * in the association response frame. Now that we no
3140 * longer use the basic rates from there, it probably
3141 * doesn't happen any more, but keep the workaround so
3142 * in case some *other* APs are buggy in different ways
3143 * we can connect -- with a warning.
3145 if (!basic_rates && min_rate_index >= 0) {
3147 "%s: No basic rates, using min rate instead.\n",
3149 basic_rates = BIT(min_rate_index);
3152 sta->sta.supp_rates[cbss->channel->band] = rates;
3153 sdata->vif.bss_conf.basic_rates = basic_rates;
3155 /* cf. IEEE 802.11 9.2.12 */
3156 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3157 have_higher_than_11mbit)
3158 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3160 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3162 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3164 /* tell driver about BSSID and basic rates */
3165 ieee80211_bss_info_change_notify(sdata,
3166 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
3169 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3171 err = sta_info_insert(sta);
3175 "%s: failed to insert STA entry for the AP (error %d)\n",
3180 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3186 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3187 struct cfg80211_auth_request *req)
3189 struct ieee80211_local *local = sdata->local;
3190 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3191 struct ieee80211_mgd_auth_data *auth_data;
3195 /* prepare auth data structure */
3197 switch (req->auth_type) {
3198 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3199 auth_alg = WLAN_AUTH_OPEN;
3201 case NL80211_AUTHTYPE_SHARED_KEY:
3202 if (IS_ERR(local->wep_tx_tfm))
3204 auth_alg = WLAN_AUTH_SHARED_KEY;
3206 case NL80211_AUTHTYPE_FT:
3207 auth_alg = WLAN_AUTH_FT;
3209 case NL80211_AUTHTYPE_NETWORK_EAP:
3210 auth_alg = WLAN_AUTH_LEAP;
3216 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3220 auth_data->bss = req->bss;
3222 if (req->ie && req->ie_len) {
3223 memcpy(auth_data->ie, req->ie, req->ie_len);
3224 auth_data->ie_len = req->ie_len;
3227 if (req->key && req->key_len) {
3228 auth_data->key_len = req->key_len;
3229 auth_data->key_idx = req->key_idx;
3230 memcpy(auth_data->key, req->key, req->key_len);
3233 auth_data->algorithm = auth_alg;
3235 /* try to authenticate/probe */
3237 mutex_lock(&ifmgd->mtx);
3239 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3240 ifmgd->assoc_data) {
3245 if (ifmgd->auth_data)
3246 ieee80211_destroy_auth_data(sdata, false);
3248 /* prep auth_data so we don't go into idle on disassoc */
3249 ifmgd->auth_data = auth_data;
3251 if (ifmgd->associated)
3252 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3254 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3255 sdata->name, req->bss->bssid);
3257 err = ieee80211_prep_connection(sdata, req->bss, false);
3261 err = ieee80211_probe_auth(sdata);
3263 sta_info_destroy_addr(sdata, req->bss->bssid);
3267 /* hold our own reference */
3268 cfg80211_ref_bss(auth_data->bss);
3273 ifmgd->auth_data = NULL;
3277 mutex_unlock(&ifmgd->mtx);
3282 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3283 struct cfg80211_assoc_request *req)
3285 struct ieee80211_local *local = sdata->local;
3286 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3287 struct ieee80211_bss *bss = (void *)req->bss->priv;
3288 struct ieee80211_mgd_assoc_data *assoc_data;
3289 struct ieee80211_supported_band *sband;
3293 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3297 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3301 mutex_lock(&ifmgd->mtx);
3303 if (ifmgd->associated)
3304 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3306 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3311 if (ifmgd->assoc_data) {
3316 if (ifmgd->auth_data) {
3319 /* keep sta info, bssid if matching */
3320 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3321 ieee80211_destroy_auth_data(sdata, match);
3324 /* prepare assoc data */
3326 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
3327 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
3329 ifmgd->beacon_crc_valid = false;
3332 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3333 * We still associate in non-HT mode (11a/b/g) if any one of these
3334 * ciphers is configured as pairwise.
3335 * We can set this to true for non-11n hardware, that'll be checked
3336 * separately along with the peer capabilities.
3338 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3339 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3340 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3341 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3342 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3344 if (req->flags & ASSOC_REQ_DISABLE_HT)
3345 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3347 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3348 sband = local->hw.wiphy->bands[req->bss->channel->band];
3349 if (!sband->ht_cap.ht_supported ||
3350 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used)
3351 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3353 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3354 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3355 sizeof(ifmgd->ht_capa_mask));
3357 if (req->ie && req->ie_len) {
3358 memcpy(assoc_data->ie, req->ie, req->ie_len);
3359 assoc_data->ie_len = req->ie_len;
3362 assoc_data->bss = req->bss;
3364 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3365 if (ifmgd->powersave)
3366 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3368 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3370 ifmgd->ap_smps = ifmgd->req_smps;
3372 assoc_data->capability = req->bss->capability;
3373 assoc_data->wmm = bss->wmm_used &&
3374 (local->hw.queues >= IEEE80211_NUM_ACS);
3375 assoc_data->supp_rates = bss->supp_rates;
3376 assoc_data->supp_rates_len = bss->supp_rates_len;
3377 assoc_data->ht_operation_ie =
3378 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3380 if (bss->wmm_used && bss->uapsd_supported &&
3381 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3382 assoc_data->uapsd = true;
3383 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3385 assoc_data->uapsd = false;
3386 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3389 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3390 assoc_data->ssid_len = ssidie[1];
3392 if (req->prev_bssid)
3393 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3396 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3397 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3399 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3400 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3403 if (req->crypto.control_port)
3404 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3406 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3408 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3409 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3411 /* kick off associate process */
3413 ifmgd->assoc_data = assoc_data;
3415 err = ieee80211_prep_connection(sdata, req->bss, true);
3419 if (!bss->dtim_period &&
3420 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3422 * Wait up to one beacon interval ...
3423 * should this be more if we miss one?
3425 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3426 sdata->name, ifmgd->bssid);
3427 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
3429 assoc_data->have_beacon = true;
3430 assoc_data->sent_assoc = false;
3431 assoc_data->timeout = jiffies;
3433 run_again(ifmgd, assoc_data->timeout);
3435 if (bss->corrupt_data) {
3436 char *corrupt_type = "data";
3437 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3438 if (bss->corrupt_data &
3439 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3440 corrupt_type = "beacon and probe response";
3442 corrupt_type = "beacon";
3443 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3444 corrupt_type = "probe response";
3445 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3446 sdata->name, corrupt_type);
3452 ifmgd->assoc_data = NULL;
3456 mutex_unlock(&ifmgd->mtx);
3461 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
3462 struct cfg80211_deauth_request *req)
3464 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3465 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3467 mutex_lock(&ifmgd->mtx);
3469 if (ifmgd->auth_data) {
3470 ieee80211_destroy_auth_data(sdata, false);
3471 mutex_unlock(&ifmgd->mtx);
3476 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
3477 sdata->name, req->bssid, req->reason_code);
3479 if (ifmgd->associated &&
3480 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
3481 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3482 req->reason_code, true, frame_buf);
3484 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3485 IEEE80211_STYPE_DEAUTH,
3486 req->reason_code, true,
3488 mutex_unlock(&ifmgd->mtx);
3490 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3492 mutex_lock(&sdata->local->mtx);
3493 ieee80211_recalc_idle(sdata->local);
3494 mutex_unlock(&sdata->local->mtx);
3499 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
3500 struct cfg80211_disassoc_request *req)
3502 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3504 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3506 mutex_lock(&ifmgd->mtx);
3509 * cfg80211 should catch this ... but it's racy since
3510 * we can receive a disassoc frame, process it, hand it
3511 * to cfg80211 while that's in a locked section already
3512 * trying to tell us that the user wants to disconnect.
3514 if (ifmgd->associated != req->bss) {
3515 mutex_unlock(&ifmgd->mtx);
3519 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
3520 sdata->name, req->bss->bssid, req->reason_code);
3522 memcpy(bssid, req->bss->bssid, ETH_ALEN);
3523 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3524 req->reason_code, !req->local_state_change,
3526 mutex_unlock(&ifmgd->mtx);
3528 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3530 mutex_lock(&sdata->local->mtx);
3531 ieee80211_recalc_idle(sdata->local);
3532 mutex_unlock(&sdata->local->mtx);
3537 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
3539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3541 mutex_lock(&ifmgd->mtx);
3542 if (ifmgd->assoc_data)
3543 ieee80211_destroy_assoc_data(sdata, false);
3544 if (ifmgd->auth_data)
3545 ieee80211_destroy_auth_data(sdata, false);
3546 del_timer_sync(&ifmgd->timer);
3547 mutex_unlock(&ifmgd->mtx);
3550 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3551 enum nl80211_cqm_rssi_threshold_event rssi_event,
3554 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3556 trace_api_cqm_rssi_notify(sdata, rssi_event);
3558 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3560 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
3562 unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3564 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3565 return sdata->dev->operstate;
3567 EXPORT_SYMBOL(ieee80211_get_operstate);