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 < 4)
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 u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1224 u16 capab, bool erp_valid, u8 erp)
1226 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1228 bool use_protection;
1229 bool use_short_preamble;
1230 bool use_short_slot;
1233 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1234 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1236 use_protection = false;
1237 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1240 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1241 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1242 use_short_slot = true;
1244 if (use_protection != bss_conf->use_cts_prot) {
1245 bss_conf->use_cts_prot = use_protection;
1246 changed |= BSS_CHANGED_ERP_CTS_PROT;
1249 if (use_short_preamble != bss_conf->use_short_preamble) {
1250 bss_conf->use_short_preamble = use_short_preamble;
1251 changed |= BSS_CHANGED_ERP_PREAMBLE;
1254 if (use_short_slot != bss_conf->use_short_slot) {
1255 bss_conf->use_short_slot = use_short_slot;
1256 changed |= BSS_CHANGED_ERP_SLOT;
1262 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1263 struct cfg80211_bss *cbss,
1264 u32 bss_info_changed)
1266 struct ieee80211_bss *bss = (void *)cbss->priv;
1267 struct ieee80211_local *local = sdata->local;
1268 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1270 bss_info_changed |= BSS_CHANGED_ASSOC;
1271 /* set timing information */
1272 bss_conf->beacon_int = cbss->beacon_interval;
1273 bss_conf->last_tsf = cbss->tsf;
1275 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1276 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1277 cbss->capability, bss->has_erp_value, bss->erp_value);
1279 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1280 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1282 sdata->u.mgd.associated = cbss;
1283 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1285 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1287 /* just to be sure */
1288 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1289 IEEE80211_STA_BEACON_POLL);
1291 ieee80211_led_assoc(local, 1);
1293 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1294 bss_conf->dtim_period = bss->dtim_period;
1296 bss_conf->dtim_period = 0;
1298 bss_conf->assoc = 1;
1300 /* Tell the driver to monitor connection quality (if supported) */
1301 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1302 bss_conf->cqm_rssi_thold)
1303 bss_info_changed |= BSS_CHANGED_CQM;
1305 /* Enable ARP filtering */
1306 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1307 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1308 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1311 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1313 mutex_lock(&local->iflist_mtx);
1314 ieee80211_recalc_ps(local, -1);
1315 ieee80211_recalc_smps(local);
1316 mutex_unlock(&local->iflist_mtx);
1318 netif_tx_start_all_queues(sdata->dev);
1319 netif_carrier_on(sdata->dev);
1322 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1323 u16 stype, u16 reason, bool tx,
1326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1327 struct ieee80211_local *local = sdata->local;
1328 struct sta_info *sta;
1332 ASSERT_MGD_MTX(ifmgd);
1334 if (WARN_ON_ONCE(tx && !frame_buf))
1337 if (WARN_ON(!ifmgd->associated))
1340 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1342 ifmgd->associated = NULL;
1343 memset(ifmgd->bssid, 0, ETH_ALEN);
1346 * we need to commit the associated = NULL change because the
1347 * scan code uses that to determine whether this iface should
1348 * go to/wake up from powersave or not -- and could otherwise
1349 * wake the queues erroneously.
1354 * Thus, we can only afterwards stop the queues -- to account
1355 * for the case where another CPU is finishing a scan at this
1356 * time -- we don't want the scan code to enable queues.
1359 netif_tx_stop_all_queues(sdata->dev);
1360 netif_carrier_off(sdata->dev);
1362 mutex_lock(&local->sta_mtx);
1363 sta = sta_info_get(sdata, bssid);
1365 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1366 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1368 mutex_unlock(&local->sta_mtx);
1370 /* deauthenticate/disassociate now */
1371 if (tx || frame_buf)
1372 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1375 /* flush out frame */
1377 drv_flush(local, false);
1379 /* remove AP and TDLS peers */
1380 sta_info_flush(local, sdata);
1382 /* finally reset all BSS / config parameters */
1383 changed |= ieee80211_reset_erp_info(sdata);
1385 ieee80211_led_assoc(local, 0);
1386 changed |= BSS_CHANGED_ASSOC;
1387 sdata->vif.bss_conf.assoc = false;
1389 /* on the next assoc, re-program HT parameters */
1390 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1391 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1393 local->power_constr_level = 0;
1395 del_timer_sync(&local->dynamic_ps_timer);
1396 cancel_work_sync(&local->dynamic_ps_enable_work);
1398 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1399 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1400 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1402 local->ps_sdata = NULL;
1404 /* Disable ARP filtering */
1405 if (sdata->vif.bss_conf.arp_filter_enabled) {
1406 sdata->vif.bss_conf.arp_filter_enabled = false;
1407 changed |= BSS_CHANGED_ARP_FILTER;
1410 sdata->vif.bss_conf.qos = false;
1411 changed |= BSS_CHANGED_QOS;
1413 /* The BSSID (not really interesting) and HT changed */
1414 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1415 ieee80211_bss_info_change_notify(sdata, changed);
1417 /* channel(_type) changes are handled by ieee80211_hw_config */
1418 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1419 ieee80211_hw_config(local, 0);
1421 /* disassociated - set to defaults now */
1422 ieee80211_set_wmm_default(sdata, false);
1424 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1425 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1426 del_timer_sync(&sdata->u.mgd.timer);
1427 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1430 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1431 struct ieee80211_hdr *hdr)
1434 * We can postpone the mgd.timer whenever receiving unicast frames
1435 * from AP because we know that the connection is working both ways
1436 * at that time. But multicast frames (and hence also beacons) must
1437 * be ignored here, because we need to trigger the timer during
1438 * data idle periods for sending the periodic probe request to the
1439 * AP we're connected to.
1441 if (is_multicast_ether_addr(hdr->addr1))
1444 ieee80211_sta_reset_conn_monitor(sdata);
1447 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1451 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1452 IEEE80211_STA_CONNECTION_POLL)))
1455 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1456 IEEE80211_STA_BEACON_POLL);
1457 mutex_lock(&sdata->local->iflist_mtx);
1458 ieee80211_recalc_ps(sdata->local, -1);
1459 mutex_unlock(&sdata->local->iflist_mtx);
1461 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1465 * We've received a probe response, but are not sure whether
1466 * we have or will be receiving any beacons or data, so let's
1467 * schedule the timers again, just in case.
1469 ieee80211_sta_reset_beacon_monitor(sdata);
1471 mod_timer(&ifmgd->conn_mon_timer,
1472 round_jiffies_up(jiffies +
1473 IEEE80211_CONNECTION_IDLE_TIME));
1476 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1477 struct ieee80211_hdr *hdr, bool ack)
1479 if (!ieee80211_is_data(hdr->frame_control))
1483 ieee80211_sta_reset_conn_monitor(sdata);
1485 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1486 sdata->u.mgd.probe_send_count > 0) {
1488 sdata->u.mgd.probe_send_count = 0;
1490 sdata->u.mgd.nullfunc_failed = true;
1491 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1495 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1497 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1499 u8 *dst = ifmgd->associated->bssid;
1500 u8 unicast_limit = max(1, max_probe_tries - 3);
1503 * Try sending broadcast probe requests for the last three
1504 * probe requests after the first ones failed since some
1505 * buggy APs only support broadcast probe requests.
1507 if (ifmgd->probe_send_count >= unicast_limit)
1511 * When the hardware reports an accurate Tx ACK status, it's
1512 * better to send a nullfunc frame instead of a probe request,
1513 * as it will kick us off the AP quickly if we aren't associated
1514 * anymore. The timeout will be reset if the frame is ACKed by
1517 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1518 ifmgd->nullfunc_failed = false;
1519 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1521 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1522 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
1523 (u32) -1, true, false);
1526 ifmgd->probe_send_count++;
1527 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1528 run_again(ifmgd, ifmgd->probe_timeout);
1529 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1530 drv_flush(sdata->local, false);
1533 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1536 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1537 bool already = false;
1539 if (!ieee80211_sdata_running(sdata))
1542 if (sdata->local->scanning)
1545 if (sdata->local->tmp_channel)
1548 mutex_lock(&ifmgd->mtx);
1550 if (!ifmgd->associated)
1553 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1554 if (beacon && net_ratelimit())
1555 printk(KERN_DEBUG "%s: detected beacon loss from AP "
1556 "- sending probe request\n", sdata->name);
1560 * The driver/our work has already reported this event or the
1561 * connection monitoring has kicked in and we have already sent
1562 * a probe request. Or maybe the AP died and the driver keeps
1563 * reporting until we disassociate...
1565 * In either case we have to ignore the current call to this
1566 * function (except for setting the correct probe reason bit)
1567 * because otherwise we would reset the timer every time and
1568 * never check whether we received a probe response!
1570 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1571 IEEE80211_STA_CONNECTION_POLL))
1575 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1577 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1582 mutex_lock(&sdata->local->iflist_mtx);
1583 ieee80211_recalc_ps(sdata->local, -1);
1584 mutex_unlock(&sdata->local->iflist_mtx);
1586 ifmgd->probe_send_count = 0;
1587 ieee80211_mgd_probe_ap_send(sdata);
1589 mutex_unlock(&ifmgd->mtx);
1592 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1593 struct ieee80211_vif *vif)
1595 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1596 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1597 struct sk_buff *skb;
1600 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1603 ASSERT_MGD_MTX(ifmgd);
1605 if (!ifmgd->associated)
1608 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1609 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1610 (u32) -1, ssid + 2, ssid[1],
1615 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1617 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1620 struct ieee80211_local *local = sdata->local;
1622 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1624 mutex_lock(&ifmgd->mtx);
1625 if (!ifmgd->associated) {
1626 mutex_unlock(&ifmgd->mtx);
1630 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1632 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1633 sdata->name, bssid);
1635 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1636 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1638 mutex_unlock(&ifmgd->mtx);
1641 * must be outside lock due to cfg80211,
1642 * but that's not a problem.
1644 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
1646 mutex_lock(&local->mtx);
1647 ieee80211_recalc_idle(local);
1648 mutex_unlock(&local->mtx);
1651 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1653 struct ieee80211_sub_if_data *sdata =
1654 container_of(work, struct ieee80211_sub_if_data,
1655 u.mgd.beacon_connection_loss_work);
1656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1657 struct sta_info *sta;
1659 if (ifmgd->associated) {
1661 sta = sta_info_get(sdata, ifmgd->bssid);
1663 sta->beacon_loss_count++;
1667 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1668 __ieee80211_connection_loss(sdata);
1670 ieee80211_mgd_probe_ap(sdata, true);
1673 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1675 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1676 struct ieee80211_hw *hw = &sdata->local->hw;
1678 trace_api_beacon_loss(sdata);
1680 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1681 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1683 EXPORT_SYMBOL(ieee80211_beacon_loss);
1685 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1687 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1688 struct ieee80211_hw *hw = &sdata->local->hw;
1690 trace_api_connection_loss(sdata);
1692 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1693 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1695 EXPORT_SYMBOL(ieee80211_connection_loss);
1698 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1701 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1703 lockdep_assert_held(&sdata->u.mgd.mtx);
1706 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1708 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1709 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1712 cfg80211_put_bss(auth_data->bss);
1714 sdata->u.mgd.auth_data = NULL;
1717 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1718 struct ieee80211_mgmt *mgmt, size_t len)
1720 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1722 struct ieee802_11_elems elems;
1724 pos = mgmt->u.auth.variable;
1725 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1726 if (!elems.challenge)
1728 auth_data->expected_transaction = 4;
1729 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1730 elems.challenge - 2, elems.challenge_len + 2,
1731 auth_data->bss->bssid, auth_data->bss->bssid,
1732 auth_data->key, auth_data->key_len,
1733 auth_data->key_idx);
1736 static enum rx_mgmt_action __must_check
1737 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1738 struct ieee80211_mgmt *mgmt, size_t len)
1740 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1742 u16 auth_alg, auth_transaction, status_code;
1743 struct sta_info *sta;
1745 lockdep_assert_held(&ifmgd->mtx);
1748 return RX_MGMT_NONE;
1750 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1751 return RX_MGMT_NONE;
1753 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1755 if (compare_ether_addr(bssid, mgmt->bssid))
1756 return RX_MGMT_NONE;
1758 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1759 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1760 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1762 if (auth_alg != ifmgd->auth_data->algorithm ||
1763 auth_transaction != ifmgd->auth_data->expected_transaction)
1764 return RX_MGMT_NONE;
1766 if (status_code != WLAN_STATUS_SUCCESS) {
1767 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1768 sdata->name, mgmt->sa, status_code);
1772 switch (ifmgd->auth_data->algorithm) {
1773 case WLAN_AUTH_OPEN:
1774 case WLAN_AUTH_LEAP:
1777 case WLAN_AUTH_SHARED_KEY:
1778 if (ifmgd->auth_data->expected_transaction != 4) {
1779 ieee80211_auth_challenge(sdata, mgmt, len);
1780 /* need another frame */
1781 return RX_MGMT_NONE;
1785 WARN_ONCE(1, "invalid auth alg %d",
1786 ifmgd->auth_data->algorithm);
1787 return RX_MGMT_NONE;
1790 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1792 ifmgd->auth_data->done = true;
1793 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1794 run_again(ifmgd, ifmgd->auth_data->timeout);
1796 /* move station state to auth */
1797 mutex_lock(&sdata->local->sta_mtx);
1798 sta = sta_info_get(sdata, bssid);
1800 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1803 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1804 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1805 sdata->name, bssid);
1808 mutex_unlock(&sdata->local->sta_mtx);
1810 return RX_MGMT_CFG80211_RX_AUTH;
1812 mutex_unlock(&sdata->local->sta_mtx);
1813 /* ignore frame -- wait for timeout */
1814 return RX_MGMT_NONE;
1818 static enum rx_mgmt_action __must_check
1819 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1820 struct ieee80211_mgmt *mgmt, size_t len)
1822 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1823 const u8 *bssid = NULL;
1826 lockdep_assert_held(&ifmgd->mtx);
1829 return RX_MGMT_NONE;
1831 if (!ifmgd->associated ||
1832 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
1833 return RX_MGMT_NONE;
1835 bssid = ifmgd->associated->bssid;
1837 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1839 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1840 sdata->name, bssid, reason_code);
1842 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1844 mutex_lock(&sdata->local->mtx);
1845 ieee80211_recalc_idle(sdata->local);
1846 mutex_unlock(&sdata->local->mtx);
1848 return RX_MGMT_CFG80211_DEAUTH;
1852 static enum rx_mgmt_action __must_check
1853 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1854 struct ieee80211_mgmt *mgmt, size_t len)
1856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1859 lockdep_assert_held(&ifmgd->mtx);
1862 return RX_MGMT_NONE;
1864 if (!ifmgd->associated ||
1865 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
1866 return RX_MGMT_NONE;
1868 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1870 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1871 sdata->name, mgmt->sa, reason_code);
1873 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1875 mutex_lock(&sdata->local->mtx);
1876 ieee80211_recalc_idle(sdata->local);
1877 mutex_unlock(&sdata->local->mtx);
1879 return RX_MGMT_CFG80211_DISASSOC;
1882 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1883 u8 *supp_rates, unsigned int supp_rates_len,
1884 u32 *rates, u32 *basic_rates,
1885 bool *have_higher_than_11mbit,
1886 int *min_rate, int *min_rate_index)
1890 for (i = 0; i < supp_rates_len; i++) {
1891 int rate = (supp_rates[i] & 0x7f) * 5;
1892 bool is_basic = !!(supp_rates[i] & 0x80);
1895 *have_higher_than_11mbit = true;
1898 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1899 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1901 * Note: Even through the membership selector and the basic
1902 * rate flag share the same bit, they are not exactly
1905 if (!!(supp_rates[i] & 0x80) &&
1906 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1909 for (j = 0; j < sband->n_bitrates; j++) {
1910 if (sband->bitrates[j].bitrate == rate) {
1913 *basic_rates |= BIT(j);
1914 if (rate < *min_rate) {
1916 *min_rate_index = j;
1924 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1927 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1929 lockdep_assert_held(&sdata->u.mgd.mtx);
1932 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1934 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1935 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1939 sdata->u.mgd.assoc_data = NULL;
1942 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1943 struct cfg80211_bss *cbss,
1944 struct ieee80211_mgmt *mgmt, size_t len)
1946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1947 struct ieee80211_local *local = sdata->local;
1948 struct ieee80211_supported_band *sband;
1949 struct sta_info *sta;
1951 u16 capab_info, aid;
1952 struct ieee802_11_elems elems;
1953 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1957 /* AssocResp and ReassocResp have identical structure */
1959 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1960 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1962 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1964 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1966 aid &= ~(BIT(15) | BIT(14));
1968 ifmgd->broken_ap = false;
1970 if (aid == 0 || aid > IEEE80211_MAX_AID) {
1972 "%s: invalid AID value %d (out of range), turn off PS\n",
1975 ifmgd->broken_ap = true;
1978 pos = mgmt->u.assoc_resp.variable;
1979 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1981 if (!elems.supp_rates) {
1982 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1989 mutex_lock(&sdata->local->sta_mtx);
1991 * station info was already allocated and inserted before
1992 * the association and should be available to us
1994 sta = sta_info_get(sdata, cbss->bssid);
1995 if (WARN_ON(!sta)) {
1996 mutex_unlock(&sdata->local->sta_mtx);
2000 sband = local->hw.wiphy->bands[local->oper_channel->band];
2002 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2003 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2004 elems.ht_cap_elem, &sta->sta.ht_cap);
2006 sta->supports_40mhz =
2007 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2009 rate_control_rate_init(sta);
2011 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2012 set_sta_flag(sta, WLAN_STA_MFP);
2014 if (elems.wmm_param)
2015 set_sta_flag(sta, WLAN_STA_WME);
2017 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2019 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2020 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2021 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2024 "%s: failed to move station %pM to desired state\n",
2025 sdata->name, sta->sta.addr);
2026 WARN_ON(__sta_info_destroy(sta));
2027 mutex_unlock(&sdata->local->sta_mtx);
2031 mutex_unlock(&sdata->local->sta_mtx);
2034 * Always handle WMM once after association regardless
2035 * of the first value the AP uses. Setting -1 here has
2036 * that effect because the AP values is an unsigned
2039 ifmgd->wmm_last_param_set = -1;
2041 if (elems.wmm_param)
2042 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2043 elems.wmm_param_len);
2045 ieee80211_set_wmm_default(sdata, false);
2046 changed |= BSS_CHANGED_QOS;
2048 if (elems.ht_operation && elems.wmm_param &&
2049 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2050 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2051 cbss->bssid, false);
2053 /* set AID and assoc capability,
2054 * ieee80211_set_associated() will tell the driver */
2055 bss_conf->aid = aid;
2056 bss_conf->assoc_capability = capab_info;
2057 ieee80211_set_associated(sdata, cbss, changed);
2060 * If we're using 4-addr mode, let the AP know that we're
2061 * doing so, so that it can create the STA VLAN on its side
2063 if (ifmgd->use_4addr)
2064 ieee80211_send_4addr_nullfunc(local, sdata);
2067 * Start timer to probe the connection to the AP now.
2068 * Also start the timer that will detect beacon loss.
2070 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2071 ieee80211_sta_reset_beacon_monitor(sdata);
2076 static enum rx_mgmt_action __must_check
2077 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2078 struct ieee80211_mgmt *mgmt, size_t len,
2079 struct cfg80211_bss **bss)
2081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2082 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2083 u16 capab_info, status_code, aid;
2084 struct ieee802_11_elems elems;
2088 lockdep_assert_held(&ifmgd->mtx);
2091 return RX_MGMT_NONE;
2092 if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
2093 return RX_MGMT_NONE;
2096 * AssocResp and ReassocResp have identical structure, so process both
2097 * of them in this function.
2101 return RX_MGMT_NONE;
2103 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2104 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2105 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2106 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2108 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2109 "status=%d aid=%d)\n",
2110 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2111 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2113 pos = mgmt->u.assoc_resp.variable;
2114 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2116 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2117 elems.timeout_int && elems.timeout_int_len == 5 &&
2118 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2120 tu = get_unaligned_le32(elems.timeout_int + 1);
2121 ms = tu * 1024 / 1000;
2122 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2123 "comeback duration %u TU (%u ms)\n",
2124 sdata->name, mgmt->sa, tu, ms);
2125 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2126 if (ms > IEEE80211_ASSOC_TIMEOUT)
2127 run_again(ifmgd, assoc_data->timeout);
2128 return RX_MGMT_NONE;
2131 *bss = assoc_data->bss;
2133 if (status_code != WLAN_STATUS_SUCCESS) {
2134 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2135 sdata->name, mgmt->sa, status_code);
2136 ieee80211_destroy_assoc_data(sdata, false);
2138 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2140 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2141 /* oops -- internal error -- send timeout for now */
2142 ieee80211_destroy_assoc_data(sdata, true);
2143 sta_info_destroy_addr(sdata, mgmt->bssid);
2144 cfg80211_put_bss(*bss);
2145 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2149 * destroy assoc_data afterwards, as otherwise an idle
2150 * recalc after assoc_data is NULL but before associated
2151 * is set can cause the interface to go idle
2153 ieee80211_destroy_assoc_data(sdata, true);
2156 return RX_MGMT_CFG80211_RX_ASSOC;
2158 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2159 struct ieee80211_mgmt *mgmt,
2161 struct ieee80211_rx_status *rx_status,
2162 struct ieee802_11_elems *elems,
2165 struct ieee80211_local *local = sdata->local;
2167 struct ieee80211_bss *bss;
2168 struct ieee80211_channel *channel;
2169 bool need_ps = false;
2171 if (sdata->u.mgd.associated &&
2172 compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
2174 bss = (void *)sdata->u.mgd.associated->priv;
2175 /* not previously set so we may need to recalc */
2176 need_ps = !bss->dtim_period;
2179 if (elems->ds_params && elems->ds_params_len == 1)
2180 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2183 freq = rx_status->freq;
2185 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2187 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2190 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2193 ieee80211_rx_bss_put(local, bss);
2195 if (!sdata->u.mgd.associated)
2199 mutex_lock(&local->iflist_mtx);
2200 ieee80211_recalc_ps(local, -1);
2201 mutex_unlock(&local->iflist_mtx);
2204 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
2205 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
2207 struct ieee80211_channel_sw_ie *sw_elem =
2208 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
2209 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2210 bss, rx_status->mactime);
2215 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2216 struct sk_buff *skb)
2218 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2219 struct ieee80211_if_managed *ifmgd;
2220 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2221 size_t baselen, len = skb->len;
2222 struct ieee802_11_elems elems;
2224 ifmgd = &sdata->u.mgd;
2226 ASSERT_MGD_MTX(ifmgd);
2228 if (compare_ether_addr(mgmt->da, sdata->vif.addr))
2229 return; /* ignore ProbeResp to foreign address */
2231 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2235 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2238 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2240 if (ifmgd->associated &&
2241 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
2242 ieee80211_reset_ap_probe(sdata);
2244 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2245 compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
2247 /* got probe response, continue with auth */
2248 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2249 ifmgd->auth_data->tries = 0;
2250 ifmgd->auth_data->timeout = jiffies;
2251 run_again(ifmgd, ifmgd->auth_data->timeout);
2256 * This is the canonical list of information elements we care about,
2257 * the filter code also gives us all changes to the Microsoft OUI
2258 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2260 * We implement beacon filtering in software since that means we can
2261 * avoid processing the frame here and in cfg80211, and userspace
2262 * will not be able to tell whether the hardware supports it or not.
2264 * XXX: This list needs to be dynamic -- userspace needs to be able to
2265 * add items it requires. It also needs to be able to tell us to
2266 * look out for other vendor IEs.
2268 static const u64 care_about_ies =
2269 (1ULL << WLAN_EID_COUNTRY) |
2270 (1ULL << WLAN_EID_ERP_INFO) |
2271 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2272 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2273 (1ULL << WLAN_EID_HT_CAPABILITY) |
2274 (1ULL << WLAN_EID_HT_OPERATION);
2276 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2277 struct ieee80211_mgmt *mgmt,
2279 struct ieee80211_rx_status *rx_status)
2281 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2282 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2284 struct ieee802_11_elems elems;
2285 struct ieee80211_local *local = sdata->local;
2287 bool erp_valid, directed_tim = false;
2292 lockdep_assert_held(&ifmgd->mtx);
2294 /* Process beacon from the current BSS */
2295 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2299 if (rx_status->freq != local->hw.conf.channel->center_freq)
2302 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2303 compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
2305 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2306 len - baselen, &elems);
2308 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2310 ifmgd->assoc_data->have_beacon = true;
2311 ifmgd->assoc_data->sent_assoc = false;
2312 /* continue assoc process */
2313 ifmgd->assoc_data->timeout = jiffies;
2314 run_again(ifmgd, ifmgd->assoc_data->timeout);
2318 if (!ifmgd->associated ||
2319 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
2321 bssid = ifmgd->associated->bssid;
2323 /* Track average RSSI from the Beacon frames of the current AP */
2324 ifmgd->last_beacon_signal = rx_status->signal;
2325 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2326 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2327 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2328 ifmgd->last_cqm_event_signal = 0;
2329 ifmgd->count_beacon_signal = 1;
2330 ifmgd->last_ave_beacon_signal = 0;
2332 ifmgd->ave_beacon_signal =
2333 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2334 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2335 ifmgd->ave_beacon_signal) / 16;
2336 ifmgd->count_beacon_signal++;
2339 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2340 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2341 int sig = ifmgd->ave_beacon_signal;
2342 int last_sig = ifmgd->last_ave_beacon_signal;
2345 * if signal crosses either of the boundaries, invoke callback
2346 * with appropriate parameters
2348 if (sig > ifmgd->rssi_max_thold &&
2349 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2350 ifmgd->last_ave_beacon_signal = sig;
2351 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2352 } else if (sig < ifmgd->rssi_min_thold &&
2353 (last_sig >= ifmgd->rssi_max_thold ||
2355 ifmgd->last_ave_beacon_signal = sig;
2356 drv_rssi_callback(local, RSSI_EVENT_LOW);
2360 if (bss_conf->cqm_rssi_thold &&
2361 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2362 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2363 int sig = ifmgd->ave_beacon_signal / 16;
2364 int last_event = ifmgd->last_cqm_event_signal;
2365 int thold = bss_conf->cqm_rssi_thold;
2366 int hyst = bss_conf->cqm_rssi_hyst;
2368 (last_event == 0 || sig < last_event - hyst)) {
2369 ifmgd->last_cqm_event_signal = sig;
2370 ieee80211_cqm_rssi_notify(
2372 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2374 } else if (sig > thold &&
2375 (last_event == 0 || sig > last_event + hyst)) {
2376 ifmgd->last_cqm_event_signal = sig;
2377 ieee80211_cqm_rssi_notify(
2379 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2384 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2385 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2386 if (net_ratelimit()) {
2387 printk(KERN_DEBUG "%s: cancelling probereq poll due "
2388 "to a received beacon\n", sdata->name);
2391 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2392 mutex_lock(&local->iflist_mtx);
2393 ieee80211_recalc_ps(local, -1);
2394 mutex_unlock(&local->iflist_mtx);
2398 * Push the beacon loss detection into the future since
2399 * we are processing a beacon from the AP just now.
2401 ieee80211_sta_reset_beacon_monitor(sdata);
2403 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2404 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2405 len - baselen, &elems,
2406 care_about_ies, ncrc);
2408 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2409 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2412 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
2413 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2416 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2417 elems.wmm_param_len);
2420 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2422 if (local->hw.conf.dynamic_ps_timeout > 0) {
2423 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2424 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2425 ieee80211_hw_config(local,
2426 IEEE80211_CONF_CHANGE_PS);
2428 ieee80211_send_nullfunc(local, sdata, 0);
2429 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2430 local->pspolling = true;
2433 * Here is assumed that the driver will be
2434 * able to send ps-poll frame and receive a
2435 * response even though power save mode is
2436 * enabled, but some drivers might require
2437 * to disable power save here. This needs
2438 * to be investigated.
2440 ieee80211_send_pspoll(local, sdata);
2445 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2447 ifmgd->beacon_crc = ncrc;
2448 ifmgd->beacon_crc_valid = true;
2450 if (elems.erp_info && elems.erp_info_len >= 1) {
2452 erp_value = elems.erp_info[0];
2456 changed |= ieee80211_handle_bss_capability(sdata,
2457 le16_to_cpu(mgmt->u.beacon.capab_info),
2458 erp_valid, erp_value);
2461 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
2462 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
2463 struct ieee80211_supported_band *sband;
2465 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2467 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2471 /* Note: country IE parsing is done for us by cfg80211 */
2472 if (elems.country_elem) {
2473 /* TODO: IBSS also needs this */
2474 if (elems.pwr_constr_elem)
2475 ieee80211_handle_pwr_constr(sdata,
2476 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2477 elems.pwr_constr_elem,
2478 elems.pwr_constr_elem_len);
2481 ieee80211_bss_info_change_notify(sdata, changed);
2484 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2485 struct sk_buff *skb)
2487 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2488 struct ieee80211_rx_status *rx_status;
2489 struct ieee80211_mgmt *mgmt;
2490 struct cfg80211_bss *bss = NULL;
2491 enum rx_mgmt_action rma = RX_MGMT_NONE;
2494 rx_status = (struct ieee80211_rx_status *) skb->cb;
2495 mgmt = (struct ieee80211_mgmt *) skb->data;
2496 fc = le16_to_cpu(mgmt->frame_control);
2498 mutex_lock(&ifmgd->mtx);
2500 switch (fc & IEEE80211_FCTL_STYPE) {
2501 case IEEE80211_STYPE_BEACON:
2502 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2504 case IEEE80211_STYPE_PROBE_RESP:
2505 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2507 case IEEE80211_STYPE_AUTH:
2508 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2510 case IEEE80211_STYPE_DEAUTH:
2511 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2513 case IEEE80211_STYPE_DISASSOC:
2514 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2516 case IEEE80211_STYPE_ASSOC_RESP:
2517 case IEEE80211_STYPE_REASSOC_RESP:
2518 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2520 case IEEE80211_STYPE_ACTION:
2521 switch (mgmt->u.action.category) {
2522 case WLAN_CATEGORY_SPECTRUM_MGMT:
2523 ieee80211_sta_process_chanswitch(sdata,
2524 &mgmt->u.action.u.chan_switch.sw_elem,
2525 (void *)ifmgd->associated->priv,
2526 rx_status->mactime);
2530 mutex_unlock(&ifmgd->mtx);
2536 case RX_MGMT_CFG80211_DEAUTH:
2537 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2539 case RX_MGMT_CFG80211_DISASSOC:
2540 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2542 case RX_MGMT_CFG80211_RX_AUTH:
2543 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2545 case RX_MGMT_CFG80211_RX_ASSOC:
2546 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2548 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2549 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2552 WARN(1, "unexpected: %d", rma);
2556 static void ieee80211_sta_timer(unsigned long data)
2558 struct ieee80211_sub_if_data *sdata =
2559 (struct ieee80211_sub_if_data *) data;
2560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2561 struct ieee80211_local *local = sdata->local;
2563 if (local->quiescing) {
2564 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2568 ieee80211_queue_work(&local->hw, &sdata->work);
2571 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2572 u8 *bssid, u8 reason)
2574 struct ieee80211_local *local = sdata->local;
2575 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2576 u8 frame_buf[DEAUTH_DISASSOC_LEN];
2578 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2579 IEEE80211_STA_BEACON_POLL);
2581 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2583 mutex_unlock(&ifmgd->mtx);
2586 * must be outside lock due to cfg80211,
2587 * but that's not a problem.
2589 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
2591 mutex_lock(&local->mtx);
2592 ieee80211_recalc_idle(local);
2593 mutex_unlock(&local->mtx);
2595 mutex_lock(&ifmgd->mtx);
2598 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2600 struct ieee80211_local *local = sdata->local;
2601 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2602 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2604 lockdep_assert_held(&ifmgd->mtx);
2606 if (WARN_ON_ONCE(!auth_data))
2611 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2612 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2613 sdata->name, auth_data->bss->bssid);
2616 * Most likely AP is not in the range so remove the
2617 * bss struct for that AP.
2619 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2624 if (auth_data->bss->proberesp_ies) {
2625 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2626 sdata->name, auth_data->bss->bssid, auth_data->tries,
2627 IEEE80211_AUTH_MAX_TRIES);
2629 auth_data->expected_transaction = 2;
2630 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2631 auth_data->ie, auth_data->ie_len,
2632 auth_data->bss->bssid,
2633 auth_data->bss->bssid, NULL, 0, 0);
2637 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2638 sdata->name, auth_data->bss->bssid, auth_data->tries,
2639 IEEE80211_AUTH_MAX_TRIES);
2641 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2645 * Direct probe is sent to broadcast address as some APs
2646 * will not answer to direct packet in unassociated state.
2648 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2649 NULL, 0, (u32) -1, true, false);
2652 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2653 run_again(ifmgd, auth_data->timeout);
2658 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2660 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2661 struct ieee80211_local *local = sdata->local;
2663 lockdep_assert_held(&sdata->u.mgd.mtx);
2665 assoc_data->tries++;
2666 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2667 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2668 sdata->name, assoc_data->bss->bssid);
2671 * Most likely AP is not in the range so remove the
2672 * bss struct for that AP.
2674 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2679 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2680 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2681 IEEE80211_ASSOC_MAX_TRIES);
2682 ieee80211_send_assoc(sdata);
2684 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2685 run_again(&sdata->u.mgd, assoc_data->timeout);
2690 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2692 struct ieee80211_local *local = sdata->local;
2693 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2695 mutex_lock(&ifmgd->mtx);
2697 if (ifmgd->auth_data &&
2698 time_after(jiffies, ifmgd->auth_data->timeout)) {
2699 if (ifmgd->auth_data->done) {
2701 * ok ... we waited for assoc but userspace didn't,
2702 * so let's just kill the auth data
2704 ieee80211_destroy_auth_data(sdata, false);
2705 } else if (ieee80211_probe_auth(sdata)) {
2708 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2710 ieee80211_destroy_auth_data(sdata, false);
2712 mutex_unlock(&ifmgd->mtx);
2713 cfg80211_send_auth_timeout(sdata->dev, bssid);
2714 mutex_lock(&ifmgd->mtx);
2716 } else if (ifmgd->auth_data)
2717 run_again(ifmgd, ifmgd->auth_data->timeout);
2719 if (ifmgd->assoc_data &&
2720 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2721 if (!ifmgd->assoc_data->have_beacon ||
2722 ieee80211_do_assoc(sdata)) {
2725 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2727 ieee80211_destroy_assoc_data(sdata, false);
2729 mutex_unlock(&ifmgd->mtx);
2730 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2731 mutex_lock(&ifmgd->mtx);
2733 } else if (ifmgd->assoc_data)
2734 run_again(ifmgd, ifmgd->assoc_data->timeout);
2736 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2737 IEEE80211_STA_CONNECTION_POLL) &&
2738 ifmgd->associated) {
2742 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2744 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2745 max_tries = max_nullfunc_tries;
2747 max_tries = max_probe_tries;
2749 /* ACK received for nullfunc probing frame */
2750 if (!ifmgd->probe_send_count)
2751 ieee80211_reset_ap_probe(sdata);
2752 else if (ifmgd->nullfunc_failed) {
2753 if (ifmgd->probe_send_count < max_tries) {
2754 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2755 wiphy_debug(local->hw.wiphy,
2756 "%s: No ack for nullfunc frame to"
2757 " AP %pM, try %d/%i\n",
2759 ifmgd->probe_send_count, max_tries);
2761 ieee80211_mgd_probe_ap_send(sdata);
2763 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2764 wiphy_debug(local->hw.wiphy,
2765 "%s: No ack for nullfunc frame to"
2766 " AP %pM, disconnecting.\n",
2767 sdata->name, bssid);
2769 ieee80211_sta_connection_lost(sdata, bssid,
2770 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2772 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2773 run_again(ifmgd, ifmgd->probe_timeout);
2774 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2775 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2776 wiphy_debug(local->hw.wiphy,
2777 "%s: Failed to send nullfunc to AP %pM"
2778 " after %dms, disconnecting.\n",
2780 bssid, probe_wait_ms);
2782 ieee80211_sta_connection_lost(sdata, bssid,
2783 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2784 } else if (ifmgd->probe_send_count < max_tries) {
2785 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2786 wiphy_debug(local->hw.wiphy,
2787 "%s: No probe response from AP %pM"
2788 " after %dms, try %d/%i\n",
2790 bssid, probe_wait_ms,
2791 ifmgd->probe_send_count, max_tries);
2793 ieee80211_mgd_probe_ap_send(sdata);
2796 * We actually lost the connection ... or did we?
2799 wiphy_debug(local->hw.wiphy,
2800 "%s: No probe response from AP %pM"
2801 " after %dms, disconnecting.\n",
2803 bssid, probe_wait_ms);
2805 ieee80211_sta_connection_lost(sdata, bssid,
2806 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2810 mutex_unlock(&ifmgd->mtx);
2812 mutex_lock(&local->mtx);
2813 ieee80211_recalc_idle(local);
2814 mutex_unlock(&local->mtx);
2817 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2819 struct ieee80211_sub_if_data *sdata =
2820 (struct ieee80211_sub_if_data *) data;
2821 struct ieee80211_local *local = sdata->local;
2823 if (local->quiescing)
2826 ieee80211_queue_work(&sdata->local->hw,
2827 &sdata->u.mgd.beacon_connection_loss_work);
2830 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2832 struct ieee80211_sub_if_data *sdata =
2833 (struct ieee80211_sub_if_data *) data;
2834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2835 struct ieee80211_local *local = sdata->local;
2837 if (local->quiescing)
2840 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2843 static void ieee80211_sta_monitor_work(struct work_struct *work)
2845 struct ieee80211_sub_if_data *sdata =
2846 container_of(work, struct ieee80211_sub_if_data,
2847 u.mgd.monitor_work);
2849 ieee80211_mgd_probe_ap(sdata, false);
2852 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2856 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2857 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2858 IEEE80211_STA_CONNECTION_POLL);
2860 /* let's probe the connection once */
2861 flags = sdata->local->hw.flags;
2862 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2863 ieee80211_queue_work(&sdata->local->hw,
2864 &sdata->u.mgd.monitor_work);
2865 /* and do all the other regular work too */
2866 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2871 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2873 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2876 * we need to use atomic bitops for the running bits
2877 * only because both timers might fire at the same
2878 * time -- the code here is properly synchronised.
2881 cancel_work_sync(&ifmgd->request_smps_work);
2883 cancel_work_sync(&ifmgd->monitor_work);
2884 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
2885 if (del_timer_sync(&ifmgd->timer))
2886 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2888 cancel_work_sync(&ifmgd->chswitch_work);
2889 if (del_timer_sync(&ifmgd->chswitch_timer))
2890 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2892 /* these will just be re-established on connection */
2893 del_timer_sync(&ifmgd->conn_mon_timer);
2894 del_timer_sync(&ifmgd->bcn_mon_timer);
2897 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2901 if (!ifmgd->associated)
2904 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2905 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2906 mutex_lock(&ifmgd->mtx);
2907 if (ifmgd->associated) {
2908 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2909 wiphy_debug(sdata->local->hw.wiphy,
2910 "%s: driver requested disconnect after resume.\n",
2913 ieee80211_sta_connection_lost(sdata,
2914 ifmgd->associated->bssid,
2915 WLAN_REASON_UNSPECIFIED);
2916 mutex_unlock(&ifmgd->mtx);
2919 mutex_unlock(&ifmgd->mtx);
2922 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2923 add_timer(&ifmgd->timer);
2924 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2925 add_timer(&ifmgd->chswitch_timer);
2926 ieee80211_sta_reset_beacon_monitor(sdata);
2927 ieee80211_restart_sta_timer(sdata);
2931 /* interface setup */
2932 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2934 struct ieee80211_if_managed *ifmgd;
2936 ifmgd = &sdata->u.mgd;
2937 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2938 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2939 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2940 ieee80211_beacon_connection_loss_work);
2941 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
2942 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2943 (unsigned long) sdata);
2944 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2945 (unsigned long) sdata);
2946 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2947 (unsigned long) sdata);
2948 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2949 (unsigned long) sdata);
2952 ifmgd->powersave = sdata->wdev.ps;
2953 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2954 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
2956 mutex_init(&ifmgd->mtx);
2958 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2959 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2961 ifmgd->req_smps = IEEE80211_SMPS_OFF;
2964 /* scan finished notification */
2965 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2967 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2969 /* Restart STA timers */
2971 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2972 ieee80211_restart_sta_timer(sdata);
2976 int ieee80211_max_network_latency(struct notifier_block *nb,
2977 unsigned long data, void *dummy)
2979 s32 latency_usec = (s32) data;
2980 struct ieee80211_local *local =
2981 container_of(nb, struct ieee80211_local,
2982 network_latency_notifier);
2984 mutex_lock(&local->iflist_mtx);
2985 ieee80211_recalc_ps(local, latency_usec);
2986 mutex_unlock(&local->iflist_mtx);
2991 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
2992 struct cfg80211_bss *cbss, bool assoc)
2994 struct ieee80211_local *local = sdata->local;
2995 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2996 struct ieee80211_bss *bss = (void *)cbss->priv;
2997 struct sta_info *sta;
2998 bool have_sta = false;
3001 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3002 const u8 *ht_oper_ie;
3003 const struct ieee80211_ht_operation *ht_oper = NULL;
3004 struct ieee80211_supported_band *sband;
3006 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3011 have_sta = sta_info_get(sdata, cbss->bssid);
3016 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3021 mutex_lock(&local->mtx);
3022 ieee80211_recalc_idle(sdata->local);
3023 mutex_unlock(&local->mtx);
3025 /* switch to the right channel */
3026 sband = local->hw.wiphy->bands[cbss->channel->band];
3028 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3030 if (sband->ht_cap.ht_supported) {
3031 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3032 cbss->information_elements,
3033 cbss->len_information_elements);
3034 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3035 ht_oper = (void *)(ht_oper_ie + 2);
3039 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3040 cbss->channel->band);
3041 /* check that channel matches the right operating channel */
3042 if (cbss->channel->center_freq != ht_cfreq) {
3044 * It's possible that some APs are confused here;
3045 * Netgear WNDR3700 sometimes reports 4 higher than
3046 * the actual channel in association responses, but
3047 * since we look at probe response/beacon data here
3051 "%s: Wrong control channel: center-freq: %d"
3052 " ht-cfreq: %d ht->primary_chan: %d"
3053 " band: %d. Disabling HT.\n",
3054 sdata->name, cbss->channel->center_freq,
3055 ht_cfreq, ht_oper->primary_chan,
3056 cbss->channel->band);
3062 channel_type = NL80211_CHAN_HT20;
3064 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3065 switch (ht_oper->ht_param &
3066 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3067 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3068 channel_type = NL80211_CHAN_HT40PLUS;
3070 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3071 channel_type = NL80211_CHAN_HT40MINUS;
3077 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3078 /* can only fail due to HT40+/- mismatch */
3079 channel_type = NL80211_CHAN_HT20;
3081 "%s: disabling 40 MHz due to multi-vif mismatch\n",
3083 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3084 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3088 local->oper_channel = cbss->channel;
3089 ieee80211_hw_config(local, 0);
3092 u32 rates = 0, basic_rates = 0;
3093 bool have_higher_than_11mbit;
3094 int min_rate = INT_MAX, min_rate_index = -1;
3096 ieee80211_get_rates(sband, bss->supp_rates,
3097 bss->supp_rates_len,
3098 &rates, &basic_rates,
3099 &have_higher_than_11mbit,
3100 &min_rate, &min_rate_index);
3103 * This used to be a workaround for basic rates missing
3104 * in the association response frame. Now that we no
3105 * longer use the basic rates from there, it probably
3106 * doesn't happen any more, but keep the workaround so
3107 * in case some *other* APs are buggy in different ways
3108 * we can connect -- with a warning.
3110 if (!basic_rates && min_rate_index >= 0) {
3112 "%s: No basic rates, using min rate instead.\n",
3114 basic_rates = BIT(min_rate_index);
3117 sta->sta.supp_rates[cbss->channel->band] = rates;
3118 sdata->vif.bss_conf.basic_rates = basic_rates;
3120 /* cf. IEEE 802.11 9.2.12 */
3121 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3122 have_higher_than_11mbit)
3123 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3125 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3127 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3129 /* tell driver about BSSID and basic rates */
3130 ieee80211_bss_info_change_notify(sdata,
3131 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
3134 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3136 err = sta_info_insert(sta);
3140 "%s: failed to insert STA entry for the AP (error %d)\n",
3145 WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, cbss->bssid));
3151 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3152 struct cfg80211_auth_request *req)
3154 struct ieee80211_local *local = sdata->local;
3155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3156 struct ieee80211_mgd_auth_data *auth_data;
3160 /* prepare auth data structure */
3162 switch (req->auth_type) {
3163 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3164 auth_alg = WLAN_AUTH_OPEN;
3166 case NL80211_AUTHTYPE_SHARED_KEY:
3167 if (IS_ERR(local->wep_tx_tfm))
3169 auth_alg = WLAN_AUTH_SHARED_KEY;
3171 case NL80211_AUTHTYPE_FT:
3172 auth_alg = WLAN_AUTH_FT;
3174 case NL80211_AUTHTYPE_NETWORK_EAP:
3175 auth_alg = WLAN_AUTH_LEAP;
3181 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3185 auth_data->bss = req->bss;
3187 if (req->ie && req->ie_len) {
3188 memcpy(auth_data->ie, req->ie, req->ie_len);
3189 auth_data->ie_len = req->ie_len;
3192 if (req->key && req->key_len) {
3193 auth_data->key_len = req->key_len;
3194 auth_data->key_idx = req->key_idx;
3195 memcpy(auth_data->key, req->key, req->key_len);
3198 auth_data->algorithm = auth_alg;
3200 /* try to authenticate/probe */
3202 mutex_lock(&ifmgd->mtx);
3204 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3205 ifmgd->assoc_data) {
3210 if (ifmgd->auth_data)
3211 ieee80211_destroy_auth_data(sdata, false);
3213 /* prep auth_data so we don't go into idle on disassoc */
3214 ifmgd->auth_data = auth_data;
3216 if (ifmgd->associated)
3217 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3219 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3220 sdata->name, req->bss->bssid);
3222 err = ieee80211_prep_connection(sdata, req->bss, false);
3226 err = ieee80211_probe_auth(sdata);
3228 sta_info_destroy_addr(sdata, req->bss->bssid);
3232 /* hold our own reference */
3233 cfg80211_ref_bss(auth_data->bss);
3238 ifmgd->auth_data = NULL;
3242 mutex_unlock(&ifmgd->mtx);
3247 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3248 struct cfg80211_assoc_request *req)
3250 struct ieee80211_local *local = sdata->local;
3251 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3252 struct ieee80211_bss *bss = (void *)req->bss->priv;
3253 struct ieee80211_mgd_assoc_data *assoc_data;
3254 struct ieee80211_supported_band *sband;
3258 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3262 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3266 mutex_lock(&ifmgd->mtx);
3268 if (ifmgd->associated)
3269 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3271 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3276 if (ifmgd->assoc_data) {
3281 if (ifmgd->auth_data) {
3284 /* keep sta info, bssid if matching */
3285 match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
3286 ieee80211_destroy_auth_data(sdata, match);
3289 /* prepare assoc data */
3291 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
3292 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
3294 ifmgd->beacon_crc_valid = false;
3297 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3298 * We still associate in non-HT mode (11a/b/g) if any one of these
3299 * ciphers is configured as pairwise.
3300 * We can set this to true for non-11n hardware, that'll be checked
3301 * separately along with the peer capabilities.
3303 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3304 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3305 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3306 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3307 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3309 if (req->flags & ASSOC_REQ_DISABLE_HT)
3310 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3312 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3313 sband = local->hw.wiphy->bands[req->bss->channel->band];
3314 if (!sband->ht_cap.ht_supported ||
3315 local->hw.queues < 4 || !bss->wmm_used)
3316 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3318 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3319 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3320 sizeof(ifmgd->ht_capa_mask));
3322 if (req->ie && req->ie_len) {
3323 memcpy(assoc_data->ie, req->ie, req->ie_len);
3324 assoc_data->ie_len = req->ie_len;
3327 assoc_data->bss = req->bss;
3329 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3330 if (ifmgd->powersave)
3331 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3333 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3335 ifmgd->ap_smps = ifmgd->req_smps;
3337 assoc_data->capability = req->bss->capability;
3338 assoc_data->wmm = bss->wmm_used && (local->hw.queues >= 4);
3339 assoc_data->supp_rates = bss->supp_rates;
3340 assoc_data->supp_rates_len = bss->supp_rates_len;
3341 assoc_data->ht_operation_ie =
3342 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3344 if (bss->wmm_used && bss->uapsd_supported &&
3345 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3346 assoc_data->uapsd = true;
3347 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3349 assoc_data->uapsd = false;
3350 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3353 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3354 assoc_data->ssid_len = ssidie[1];
3356 if (req->prev_bssid)
3357 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3360 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3361 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3363 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3364 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3367 if (req->crypto.control_port)
3368 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3370 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3372 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3373 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3375 /* kick off associate process */
3377 ifmgd->assoc_data = assoc_data;
3379 err = ieee80211_prep_connection(sdata, req->bss, true);
3383 if (!bss->dtim_period &&
3384 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3386 * Wait up to one beacon interval ...
3387 * should this be more if we miss one?
3389 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3390 sdata->name, ifmgd->bssid);
3391 assoc_data->timeout = jiffies +
3392 TU_TO_EXP_TIME(req->bss->beacon_interval);
3394 assoc_data->have_beacon = true;
3395 assoc_data->sent_assoc = false;
3396 assoc_data->timeout = jiffies;
3398 run_again(ifmgd, assoc_data->timeout);
3400 if (bss->corrupt_data) {
3401 char *corrupt_type = "data";
3402 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3403 if (bss->corrupt_data &
3404 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3405 corrupt_type = "beacon and probe response";
3407 corrupt_type = "beacon";
3408 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3409 corrupt_type = "probe response";
3410 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3411 sdata->name, corrupt_type);
3417 ifmgd->assoc_data = NULL;
3421 mutex_unlock(&ifmgd->mtx);
3426 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
3427 struct cfg80211_deauth_request *req)
3429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3430 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3432 mutex_lock(&ifmgd->mtx);
3434 if (ifmgd->auth_data) {
3435 ieee80211_destroy_auth_data(sdata, false);
3436 mutex_unlock(&ifmgd->mtx);
3441 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
3442 sdata->name, req->bssid, req->reason_code);
3444 if (ifmgd->associated &&
3445 compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
3446 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3447 req->reason_code, true, frame_buf);
3449 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3450 IEEE80211_STYPE_DEAUTH,
3451 req->reason_code, true,
3453 mutex_unlock(&ifmgd->mtx);
3455 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3457 mutex_lock(&sdata->local->mtx);
3458 ieee80211_recalc_idle(sdata->local);
3459 mutex_unlock(&sdata->local->mtx);
3464 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
3465 struct cfg80211_disassoc_request *req)
3467 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3469 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3471 mutex_lock(&ifmgd->mtx);
3474 * cfg80211 should catch this ... but it's racy since
3475 * we can receive a disassoc frame, process it, hand it
3476 * to cfg80211 while that's in a locked section already
3477 * trying to tell us that the user wants to disconnect.
3479 if (ifmgd->associated != req->bss) {
3480 mutex_unlock(&ifmgd->mtx);
3484 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
3485 sdata->name, req->bss->bssid, req->reason_code);
3487 memcpy(bssid, req->bss->bssid, ETH_ALEN);
3488 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3489 req->reason_code, !req->local_state_change,
3491 mutex_unlock(&ifmgd->mtx);
3493 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3495 mutex_lock(&sdata->local->mtx);
3496 ieee80211_recalc_idle(sdata->local);
3497 mutex_unlock(&sdata->local->mtx);
3502 void ieee80211_mgd_teardown(struct ieee80211_sub_if_data *sdata)
3504 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3506 mutex_lock(&ifmgd->mtx);
3507 if (ifmgd->assoc_data)
3508 ieee80211_destroy_assoc_data(sdata, false);
3509 if (ifmgd->auth_data)
3510 ieee80211_destroy_auth_data(sdata, false);
3511 del_timer_sync(&ifmgd->timer);
3512 mutex_unlock(&ifmgd->mtx);
3515 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3516 enum nl80211_cqm_rssi_threshold_event rssi_event,
3519 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3521 trace_api_cqm_rssi_notify(sdata, rssi_event);
3523 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3525 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
3527 unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3529 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3530 return sdata->dev->operstate;
3532 EXPORT_SYMBOL(ieee80211_get_operstate);