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;
175 * ieee80211_enable_ht should be called only after the operating band
176 * has been determined as ht configuration depends on the hw's
177 * HT abilities for a specific band.
179 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
180 struct ieee80211_ht_info *hti,
181 const u8 *bssid, u16 ap_ht_cap_flags,
182 bool beacon_htcap_ie)
184 struct ieee80211_local *local = sdata->local;
185 struct ieee80211_supported_band *sband;
186 struct sta_info *sta;
190 bool enable_ht = true;
191 enum nl80211_channel_type prev_chantype;
192 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
194 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
196 prev_chantype = sdata->vif.bss_conf.channel_type;
198 /* HT is not supported */
199 if (!sband->ht_cap.ht_supported)
203 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
205 /* check that channel matches the right operating channel */
206 if (local->hw.conf.channel->center_freq != hti_cfreq) {
207 /* Some APs mess this up, evidently.
208 * Netgear WNDR3700 sometimes reports 4 higher than
209 * the actual channel, for instance.
212 "%s: Wrong control channel in association"
213 " response: configured center-freq: %d"
214 " hti-cfreq: %d hti->control_chan: %d"
215 " band: %d. Disabling HT.\n",
217 local->hw.conf.channel->center_freq,
218 hti_cfreq, hti->control_chan,
225 channel_type = NL80211_CHAN_HT20;
227 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
228 !ieee80111_cfg_override_disables_ht40(sdata) &&
229 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
230 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
231 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
232 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
233 if (!(local->hw.conf.channel->flags &
234 IEEE80211_CHAN_NO_HT40PLUS))
235 channel_type = NL80211_CHAN_HT40PLUS;
237 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
238 if (!(local->hw.conf.channel->flags &
239 IEEE80211_CHAN_NO_HT40MINUS))
240 channel_type = NL80211_CHAN_HT40MINUS;
246 if (local->tmp_channel)
247 local->tmp_channel_type = channel_type;
249 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
250 /* can only fail due to HT40+/- mismatch */
251 channel_type = NL80211_CHAN_HT20;
252 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
255 if (beacon_htcap_ie && (prev_chantype != channel_type)) {
257 * Whenever the AP announces the HT mode change that can be
258 * 40MHz intolerant or etc., it would be safer to stop tx
259 * queues before doing hw config to avoid buffer overflow.
261 ieee80211_stop_queues_by_reason(&sdata->local->hw,
262 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
264 /* flush out all packets */
267 drv_flush(local, false);
270 /* channel_type change automatically detected */
271 ieee80211_hw_config(local, 0);
273 if (prev_chantype != channel_type) {
275 sta = sta_info_get(sdata, bssid);
277 rate_control_rate_update(local, sband, sta,
278 IEEE80211_RC_HT_CHANGED,
283 ieee80211_wake_queues_by_reason(&sdata->local->hw,
284 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
287 ht_opmode = le16_to_cpu(hti->operation_mode);
289 /* if bss configuration changed store the new one */
290 if (sdata->ht_opmode_valid != enable_ht ||
291 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
292 prev_chantype != channel_type) {
293 changed |= BSS_CHANGED_HT;
294 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
295 sdata->ht_opmode_valid = enable_ht;
301 /* frame sending functions */
303 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
304 struct ieee80211_supported_band *sband,
310 for (i = 0; i < supp_rates_len; i++) {
311 int rate = (supp_rates[i] & 0x7F) * 5;
313 for (j = 0; j < sband->n_bitrates; j++)
314 if (sband->bitrates[j].bitrate == rate) {
324 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
325 struct sk_buff *skb, const u8 *ht_info_ie,
326 struct ieee80211_supported_band *sband,
327 struct ieee80211_channel *channel,
328 enum ieee80211_smps_mode smps)
330 struct ieee80211_ht_info *ht_info;
332 u32 flags = channel->flags;
334 struct ieee80211_sta_ht_cap ht_cap;
336 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
338 if (!sband->ht_cap.ht_supported)
344 if (ht_info_ie[1] < sizeof(struct ieee80211_ht_info))
347 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
348 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
350 ht_info = (struct ieee80211_ht_info *)(ht_info_ie + 2);
352 /* determine capability flags */
355 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
356 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
357 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
358 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
359 cap &= ~IEEE80211_HT_CAP_SGI_40;
362 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
363 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
364 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
365 cap &= ~IEEE80211_HT_CAP_SGI_40;
370 /* set SM PS mode properly */
371 cap &= ~IEEE80211_HT_CAP_SM_PS;
373 case IEEE80211_SMPS_AUTOMATIC:
374 case IEEE80211_SMPS_NUM_MODES:
376 case IEEE80211_SMPS_OFF:
377 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
378 IEEE80211_HT_CAP_SM_PS_SHIFT;
380 case IEEE80211_SMPS_STATIC:
381 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
382 IEEE80211_HT_CAP_SM_PS_SHIFT;
384 case IEEE80211_SMPS_DYNAMIC:
385 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
386 IEEE80211_HT_CAP_SM_PS_SHIFT;
390 /* reserve and fill IE */
391 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
392 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
395 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
397 struct ieee80211_local *local = sdata->local;
398 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
399 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
401 struct ieee80211_mgmt *mgmt;
403 size_t offset = 0, noffset;
404 int i, count, rates_len, supp_rates_len;
406 struct ieee80211_supported_band *sband;
408 struct ieee80211_bss *bss = (void *)assoc_data->bss->priv;
410 lockdep_assert_held(&ifmgd->mtx);
412 sband = local->hw.wiphy->bands[local->oper_channel->band];
414 if (assoc_data->supp_rates_len) {
416 * Get all rates supported by the device and the AP as
417 * some APs don't like getting a superset of their rates
418 * in the association request (e.g. D-Link DAP 1353 in
421 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
422 assoc_data->supp_rates_len,
426 * In case AP not provide any supported rates information
427 * before association, we send information element(s) with
428 * all rates that we support.
431 rates_len = sband->n_bitrates;
434 skb = alloc_skb(local->hw.extra_tx_headroom +
435 sizeof(*mgmt) + /* bit too much but doesn't matter */
436 2 + assoc_data->ssid_len + /* SSID */
437 4 + rates_len + /* (extended) rates */
438 4 + /* power capability */
439 2 + 2 * sband->n_channels + /* supported channels */
440 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
441 assoc_data->ie_len + /* extra IEs */
447 skb_reserve(skb, local->hw.extra_tx_headroom);
449 capab = WLAN_CAPABILITY_ESS;
451 if (sband->band == IEEE80211_BAND_2GHZ) {
452 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
453 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
454 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
455 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
458 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
459 capab |= WLAN_CAPABILITY_PRIVACY;
461 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
462 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
463 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
465 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
467 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
468 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
469 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
471 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
473 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
474 IEEE80211_STYPE_REASSOC_REQ);
475 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
476 mgmt->u.reassoc_req.listen_interval =
477 cpu_to_le16(local->hw.conf.listen_interval);
478 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
482 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
483 IEEE80211_STYPE_ASSOC_REQ);
484 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
485 mgmt->u.assoc_req.listen_interval =
486 cpu_to_le16(local->hw.conf.listen_interval);
490 pos = skb_put(skb, 2 + assoc_data->ssid_len);
491 *pos++ = WLAN_EID_SSID;
492 *pos++ = assoc_data->ssid_len;
493 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
495 /* add all rates which were marked to be used above */
496 supp_rates_len = rates_len;
497 if (supp_rates_len > 8)
500 pos = skb_put(skb, supp_rates_len + 2);
501 *pos++ = WLAN_EID_SUPP_RATES;
502 *pos++ = supp_rates_len;
505 for (i = 0; i < sband->n_bitrates; i++) {
506 if (BIT(i) & rates) {
507 int rate = sband->bitrates[i].bitrate;
508 *pos++ = (u8) (rate / 5);
514 if (rates_len > count) {
515 pos = skb_put(skb, rates_len - count + 2);
516 *pos++ = WLAN_EID_EXT_SUPP_RATES;
517 *pos++ = rates_len - count;
519 for (i++; i < sband->n_bitrates; i++) {
520 if (BIT(i) & rates) {
521 int rate = sband->bitrates[i].bitrate;
522 *pos++ = (u8) (rate / 5);
527 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
528 /* 1. power capabilities */
529 pos = skb_put(skb, 4);
530 *pos++ = WLAN_EID_PWR_CAPABILITY;
532 *pos++ = 0; /* min tx power */
533 *pos++ = local->oper_channel->max_power; /* max tx power */
535 /* 2. supported channels */
536 /* TODO: get this in reg domain format */
537 pos = skb_put(skb, 2 * sband->n_channels + 2);
538 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
539 *pos++ = 2 * sband->n_channels;
540 for (i = 0; i < sband->n_channels; i++) {
541 *pos++ = ieee80211_frequency_to_channel(
542 sband->channels[i].center_freq);
543 *pos++ = 1; /* one channel in the subband*/
547 /* if present, add any custom IEs that go before HT */
548 if (assoc_data->ie_len && assoc_data->ie) {
549 static const u8 before_ht[] = {
552 WLAN_EID_EXT_SUPP_RATES,
553 WLAN_EID_PWR_CAPABILITY,
554 WLAN_EID_SUPPORTED_CHANNELS,
557 WLAN_EID_RRM_ENABLED_CAPABILITIES,
558 WLAN_EID_MOBILITY_DOMAIN,
559 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
561 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
562 before_ht, ARRAY_SIZE(before_ht),
564 pos = skb_put(skb, noffset - offset);
565 memcpy(pos, assoc_data->ie + offset, noffset - offset);
569 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N) &&
570 bss->wmm_used && local->hw.queues >= 4)
571 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_information_ie,
572 sband, local->oper_channel, ifmgd->ap_smps);
574 /* if present, add any custom non-vendor IEs that go after HT */
575 if (assoc_data->ie_len && assoc_data->ie) {
576 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
579 pos = skb_put(skb, noffset - offset);
580 memcpy(pos, assoc_data->ie + offset, noffset - offset);
584 if (assoc_data->wmm_used && local->hw.queues >= 4) {
585 if (assoc_data->uapsd_used) {
586 qos_info = local->uapsd_queues;
587 qos_info |= (local->uapsd_max_sp_len <<
588 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
593 pos = skb_put(skb, 9);
594 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
595 *pos++ = 7; /* len */
596 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
599 *pos++ = 2; /* WME */
600 *pos++ = 0; /* WME info */
601 *pos++ = 1; /* WME ver */
605 /* add any remaining custom (i.e. vendor specific here) IEs */
606 if (assoc_data->ie_len && assoc_data->ie) {
607 noffset = assoc_data->ie_len;
608 pos = skb_put(skb, noffset - offset);
609 memcpy(pos, assoc_data->ie + offset, noffset - offset);
612 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
613 ieee80211_tx_skb(sdata, skb);
616 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
617 const u8 *bssid, u16 stype,
618 u16 reason, bool send_frame,
621 struct ieee80211_local *local = sdata->local;
622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
624 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
627 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
628 mgmt->duration = 0; /* initialize only */
629 mgmt->seq_ctrl = 0; /* initialize only */
630 memcpy(mgmt->da, bssid, ETH_ALEN);
631 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
632 memcpy(mgmt->bssid, bssid, ETH_ALEN);
633 /* u.deauth.reason_code == u.disassoc.reason_code */
634 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
637 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
638 DEAUTH_DISASSOC_LEN);
642 skb_reserve(skb, local->hw.extra_tx_headroom);
645 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
646 mgmt, DEAUTH_DISASSOC_LEN);
648 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
649 IEEE80211_SKB_CB(skb)->flags |=
650 IEEE80211_TX_INTFL_DONT_ENCRYPT;
651 ieee80211_tx_skb(sdata, skb);
655 void ieee80211_send_pspoll(struct ieee80211_local *local,
656 struct ieee80211_sub_if_data *sdata)
658 struct ieee80211_pspoll *pspoll;
661 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
665 pspoll = (struct ieee80211_pspoll *) skb->data;
666 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
668 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
669 ieee80211_tx_skb(sdata, skb);
672 void ieee80211_send_nullfunc(struct ieee80211_local *local,
673 struct ieee80211_sub_if_data *sdata,
677 struct ieee80211_hdr_3addr *nullfunc;
678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
680 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
684 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
686 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
688 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
689 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
690 IEEE80211_STA_CONNECTION_POLL))
691 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
693 ieee80211_tx_skb(sdata, skb);
696 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
697 struct ieee80211_sub_if_data *sdata)
700 struct ieee80211_hdr *nullfunc;
703 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
706 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
710 skb_reserve(skb, local->hw.extra_tx_headroom);
712 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
713 memset(nullfunc, 0, 30);
714 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
715 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
716 nullfunc->frame_control = fc;
717 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
718 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
719 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
720 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
722 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
723 ieee80211_tx_skb(sdata, skb);
726 /* spectrum management related things */
727 static void ieee80211_chswitch_work(struct work_struct *work)
729 struct ieee80211_sub_if_data *sdata =
730 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
731 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
733 if (!ieee80211_sdata_running(sdata))
736 mutex_lock(&ifmgd->mtx);
737 if (!ifmgd->associated)
740 sdata->local->oper_channel = sdata->local->csa_channel;
741 if (!sdata->local->ops->channel_switch) {
742 /* call "hw_config" only if doing sw channel switch */
743 ieee80211_hw_config(sdata->local,
744 IEEE80211_CONF_CHANGE_CHANNEL);
746 /* update the device channel directly */
747 sdata->local->hw.conf.channel = sdata->local->oper_channel;
750 /* XXX: shouldn't really modify cfg80211-owned data! */
751 ifmgd->associated->channel = sdata->local->oper_channel;
753 ieee80211_wake_queues_by_reason(&sdata->local->hw,
754 IEEE80211_QUEUE_STOP_REASON_CSA);
756 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
757 mutex_unlock(&ifmgd->mtx);
760 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
762 struct ieee80211_sub_if_data *sdata;
763 struct ieee80211_if_managed *ifmgd;
765 sdata = vif_to_sdata(vif);
766 ifmgd = &sdata->u.mgd;
768 trace_api_chswitch_done(sdata, success);
771 * If the channel switch was not successful, stay
772 * around on the old channel. We currently lack
773 * good handling of this situation, possibly we
774 * should just drop the association.
776 sdata->local->csa_channel = sdata->local->oper_channel;
779 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
781 EXPORT_SYMBOL(ieee80211_chswitch_done);
783 static void ieee80211_chswitch_timer(unsigned long data)
785 struct ieee80211_sub_if_data *sdata =
786 (struct ieee80211_sub_if_data *) data;
787 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
789 if (sdata->local->quiescing) {
790 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
794 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
797 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
798 struct ieee80211_channel_sw_ie *sw_elem,
799 struct ieee80211_bss *bss,
802 struct cfg80211_bss *cbss =
803 container_of((void *)bss, struct cfg80211_bss, priv);
804 struct ieee80211_channel *new_ch;
805 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
806 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
807 cbss->channel->band);
809 ASSERT_MGD_MTX(ifmgd);
811 if (!ifmgd->associated)
814 if (sdata->local->scanning)
817 /* Disregard subsequent beacons if we are already running a timer
820 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
823 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
824 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
827 sdata->local->csa_channel = new_ch;
829 if (sdata->local->ops->channel_switch) {
830 /* use driver's channel switch callback */
831 struct ieee80211_channel_switch ch_switch;
832 memset(&ch_switch, 0, sizeof(ch_switch));
833 ch_switch.timestamp = timestamp;
835 ch_switch.block_tx = true;
836 ieee80211_stop_queues_by_reason(&sdata->local->hw,
837 IEEE80211_QUEUE_STOP_REASON_CSA);
839 ch_switch.channel = new_ch;
840 ch_switch.count = sw_elem->count;
841 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
842 drv_channel_switch(sdata->local, &ch_switch);
846 /* channel switch handled in software */
847 if (sw_elem->count <= 1) {
848 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
851 ieee80211_stop_queues_by_reason(&sdata->local->hw,
852 IEEE80211_QUEUE_STOP_REASON_CSA);
853 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
854 mod_timer(&ifmgd->chswitch_timer,
856 msecs_to_jiffies(sw_elem->count *
857 cbss->beacon_interval));
861 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
862 u16 capab_info, u8 *pwr_constr_elem,
863 u8 pwr_constr_elem_len)
865 struct ieee80211_conf *conf = &sdata->local->hw.conf;
867 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
870 /* Power constraint IE length should be 1 octet */
871 if (pwr_constr_elem_len != 1)
874 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
875 (*pwr_constr_elem != sdata->local->power_constr_level)) {
876 sdata->local->power_constr_level = *pwr_constr_elem;
877 ieee80211_hw_config(sdata->local, 0);
881 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
883 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
884 struct ieee80211_local *local = sdata->local;
885 struct ieee80211_conf *conf = &local->hw.conf;
887 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
888 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
889 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
891 local->disable_dynamic_ps = false;
892 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
894 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
896 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
898 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
899 struct ieee80211_local *local = sdata->local;
900 struct ieee80211_conf *conf = &local->hw.conf;
902 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
903 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
904 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
906 local->disable_dynamic_ps = true;
907 conf->dynamic_ps_timeout = 0;
908 del_timer_sync(&local->dynamic_ps_timer);
909 ieee80211_queue_work(&local->hw,
910 &local->dynamic_ps_enable_work);
912 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
915 static void ieee80211_enable_ps(struct ieee80211_local *local,
916 struct ieee80211_sub_if_data *sdata)
918 struct ieee80211_conf *conf = &local->hw.conf;
921 * If we are scanning right now then the parameters will
922 * take effect when scan finishes.
927 if (conf->dynamic_ps_timeout > 0 &&
928 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
929 mod_timer(&local->dynamic_ps_timer, jiffies +
930 msecs_to_jiffies(conf->dynamic_ps_timeout));
932 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
933 ieee80211_send_nullfunc(local, sdata, 1);
935 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
936 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
939 conf->flags |= IEEE80211_CONF_PS;
940 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
944 static void ieee80211_change_ps(struct ieee80211_local *local)
946 struct ieee80211_conf *conf = &local->hw.conf;
948 if (local->ps_sdata) {
949 ieee80211_enable_ps(local, local->ps_sdata);
950 } else if (conf->flags & IEEE80211_CONF_PS) {
951 conf->flags &= ~IEEE80211_CONF_PS;
952 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
953 del_timer_sync(&local->dynamic_ps_timer);
954 cancel_work_sync(&local->dynamic_ps_enable_work);
958 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
960 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
961 struct sta_info *sta = NULL;
962 bool authorized = false;
970 if (!mgd->associated)
973 if (!mgd->associated->beacon_ies)
976 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
977 IEEE80211_STA_CONNECTION_POLL))
981 sta = sta_info_get(sdata, mgd->bssid);
983 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
989 /* need to hold RTNL or interface lock */
990 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
992 struct ieee80211_sub_if_data *sdata, *found = NULL;
996 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
997 local->ps_sdata = NULL;
1001 if (!list_empty(&local->work_list)) {
1002 local->ps_sdata = NULL;
1006 list_for_each_entry(sdata, &local->interfaces, list) {
1007 if (!ieee80211_sdata_running(sdata))
1009 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1010 /* If an AP vif is found, then disable PS
1011 * by setting the count to zero thereby setting
1017 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1023 if (count == 1 && ieee80211_powersave_allowed(found)) {
1024 struct ieee80211_conf *conf = &local->hw.conf;
1028 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1030 beaconint_us = ieee80211_tu_to_usec(
1031 found->vif.bss_conf.beacon_int);
1033 timeout = local->dynamic_ps_forced_timeout;
1036 * Go to full PSM if the user configures a very low
1037 * latency requirement.
1038 * The 2000 second value is there for compatibility
1039 * until the PM_QOS_NETWORK_LATENCY is configured
1042 if (latency > (1900 * USEC_PER_MSEC) &&
1043 latency != (2000 * USEC_PER_SEC))
1048 local->dynamic_ps_user_timeout = timeout;
1049 if (!local->disable_dynamic_ps)
1050 conf->dynamic_ps_timeout =
1051 local->dynamic_ps_user_timeout;
1053 if (beaconint_us > latency) {
1054 local->ps_sdata = NULL;
1056 struct ieee80211_bss *bss;
1060 bss = (void *)found->u.mgd.associated->priv;
1061 dtimper = bss->dtim_period;
1063 /* If the TIM IE is invalid, pretend the value is 1 */
1066 else if (dtimper > 1)
1067 maxslp = min_t(int, dtimper,
1068 latency / beaconint_us);
1070 local->hw.conf.max_sleep_period = maxslp;
1071 local->hw.conf.ps_dtim_period = dtimper;
1072 local->ps_sdata = found;
1075 local->ps_sdata = NULL;
1079 ieee80211_change_ps(local);
1082 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1084 struct ieee80211_local *local =
1085 container_of(work, struct ieee80211_local,
1086 dynamic_ps_disable_work);
1088 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1089 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1090 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1093 ieee80211_wake_queues_by_reason(&local->hw,
1094 IEEE80211_QUEUE_STOP_REASON_PS);
1097 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1099 struct ieee80211_local *local =
1100 container_of(work, struct ieee80211_local,
1101 dynamic_ps_enable_work);
1102 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1103 struct ieee80211_if_managed *ifmgd;
1104 unsigned long flags;
1107 /* can only happen when PS was just disabled anyway */
1111 ifmgd = &sdata->u.mgd;
1113 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1116 if (!local->disable_dynamic_ps &&
1117 local->hw.conf.dynamic_ps_timeout > 0) {
1118 /* don't enter PS if TX frames are pending */
1119 if (drv_tx_frames_pending(local)) {
1120 mod_timer(&local->dynamic_ps_timer, jiffies +
1122 local->hw.conf.dynamic_ps_timeout));
1127 * transmission can be stopped by others which leads to
1128 * dynamic_ps_timer expiry. Postpone the ps timer if it
1129 * is not the actual idle state.
1131 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1132 for (q = 0; q < local->hw.queues; q++) {
1133 if (local->queue_stop_reasons[q]) {
1134 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1136 mod_timer(&local->dynamic_ps_timer, jiffies +
1138 local->hw.conf.dynamic_ps_timeout));
1142 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1145 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1146 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1147 netif_tx_stop_all_queues(sdata->dev);
1149 if (drv_tx_frames_pending(local))
1150 mod_timer(&local->dynamic_ps_timer, jiffies +
1152 local->hw.conf.dynamic_ps_timeout));
1154 ieee80211_send_nullfunc(local, sdata, 1);
1155 /* Flush to get the tx status of nullfunc frame */
1156 drv_flush(local, false);
1160 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1161 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1162 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1163 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1164 local->hw.conf.flags |= IEEE80211_CONF_PS;
1165 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1168 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1169 netif_tx_wake_all_queues(sdata->dev);
1172 void ieee80211_dynamic_ps_timer(unsigned long data)
1174 struct ieee80211_local *local = (void *) data;
1176 if (local->quiescing || local->suspended)
1179 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1183 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
1184 struct ieee80211_sub_if_data *sdata,
1185 u8 *wmm_param, size_t wmm_param_len)
1187 struct ieee80211_tx_queue_params params;
1188 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1191 u8 *pos, uapsd_queues = 0;
1193 if (!local->ops->conf_tx)
1196 if (local->hw.queues < 4)
1202 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1205 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1206 uapsd_queues = local->uapsd_queues;
1208 count = wmm_param[6] & 0x0f;
1209 if (count == ifmgd->wmm_last_param_set)
1211 ifmgd->wmm_last_param_set = count;
1213 pos = wmm_param + 8;
1214 left = wmm_param_len - 8;
1216 memset(¶ms, 0, sizeof(params));
1219 for (; left >= 4; left -= 4, pos += 4) {
1220 int aci = (pos[0] >> 5) & 0x03;
1221 int acm = (pos[0] >> 4) & 0x01;
1229 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1230 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1236 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1237 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1243 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1244 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1251 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1252 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1257 params.aifs = pos[0] & 0x0f;
1258 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1259 params.cw_min = ecw2cw(pos[1] & 0x0f);
1260 params.txop = get_unaligned_le16(pos + 2);
1261 params.uapsd = uapsd;
1263 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1264 wiphy_debug(local->hw.wiphy,
1265 "WMM queue=%d aci=%d acm=%d aifs=%d "
1266 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1268 params.aifs, params.cw_min, params.cw_max,
1269 params.txop, params.uapsd);
1271 sdata->tx_conf[queue] = params;
1272 if (drv_conf_tx(local, sdata, queue, ¶ms))
1273 wiphy_debug(local->hw.wiphy,
1274 "failed to set TX queue parameters for queue %d\n",
1278 /* enable WMM or activate new settings */
1279 sdata->vif.bss_conf.qos = true;
1280 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1283 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1284 u16 capab, bool erp_valid, u8 erp)
1286 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1288 bool use_protection;
1289 bool use_short_preamble;
1290 bool use_short_slot;
1293 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1294 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1296 use_protection = false;
1297 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1300 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1301 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1302 use_short_slot = true;
1304 if (use_protection != bss_conf->use_cts_prot) {
1305 bss_conf->use_cts_prot = use_protection;
1306 changed |= BSS_CHANGED_ERP_CTS_PROT;
1309 if (use_short_preamble != bss_conf->use_short_preamble) {
1310 bss_conf->use_short_preamble = use_short_preamble;
1311 changed |= BSS_CHANGED_ERP_PREAMBLE;
1314 if (use_short_slot != bss_conf->use_short_slot) {
1315 bss_conf->use_short_slot = use_short_slot;
1316 changed |= BSS_CHANGED_ERP_SLOT;
1322 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1323 struct cfg80211_bss *cbss,
1324 u32 bss_info_changed)
1326 struct ieee80211_bss *bss = (void *)cbss->priv;
1327 struct ieee80211_local *local = sdata->local;
1328 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1330 bss_info_changed |= BSS_CHANGED_ASSOC;
1331 /* set timing information */
1332 bss_conf->beacon_int = cbss->beacon_interval;
1333 bss_conf->timestamp = cbss->tsf;
1335 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1336 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1337 cbss->capability, bss->has_erp_value, bss->erp_value);
1339 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1340 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1342 sdata->u.mgd.associated = cbss;
1343 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1345 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1347 /* just to be sure */
1348 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1349 IEEE80211_STA_BEACON_POLL);
1351 ieee80211_led_assoc(local, 1);
1353 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1354 bss_conf->dtim_period = bss->dtim_period;
1356 bss_conf->dtim_period = 0;
1358 bss_conf->assoc = 1;
1360 * For now just always ask the driver to update the basic rateset
1361 * when we have associated, we aren't checking whether it actually
1364 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
1366 /* And the BSSID changed - we're associated now */
1367 bss_info_changed |= BSS_CHANGED_BSSID;
1369 /* Tell the driver to monitor connection quality (if supported) */
1370 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1371 bss_conf->cqm_rssi_thold)
1372 bss_info_changed |= BSS_CHANGED_CQM;
1374 /* Enable ARP filtering */
1375 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1376 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1377 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1380 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1382 mutex_lock(&local->iflist_mtx);
1383 ieee80211_recalc_ps(local, -1);
1384 ieee80211_recalc_smps(local);
1385 mutex_unlock(&local->iflist_mtx);
1387 netif_tx_start_all_queues(sdata->dev);
1388 netif_carrier_on(sdata->dev);
1391 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1392 u16 stype, u16 reason, bool tx,
1395 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1396 struct ieee80211_local *local = sdata->local;
1397 struct sta_info *sta;
1398 u32 changed = 0, config_changed = 0;
1401 ASSERT_MGD_MTX(ifmgd);
1403 if (WARN_ON_ONCE(tx && !frame_buf))
1406 if (WARN_ON(!ifmgd->associated))
1409 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1411 ifmgd->associated = NULL;
1412 memset(ifmgd->bssid, 0, ETH_ALEN);
1415 * we need to commit the associated = NULL change because the
1416 * scan code uses that to determine whether this iface should
1417 * go to/wake up from powersave or not -- and could otherwise
1418 * wake the queues erroneously.
1423 * Thus, we can only afterwards stop the queues -- to account
1424 * for the case where another CPU is finishing a scan at this
1425 * time -- we don't want the scan code to enable queues.
1428 netif_tx_stop_all_queues(sdata->dev);
1429 netif_carrier_off(sdata->dev);
1431 mutex_lock(&local->sta_mtx);
1432 sta = sta_info_get(sdata, bssid);
1434 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1435 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1437 mutex_unlock(&local->sta_mtx);
1439 /* deauthenticate/disassociate now */
1440 if (tx || frame_buf)
1441 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1444 /* flush out frame */
1446 drv_flush(local, false);
1448 /* remove AP and TDLS peers */
1449 sta_info_flush(local, sdata);
1451 /* finally reset all BSS / config parameters */
1452 changed |= ieee80211_reset_erp_info(sdata);
1454 ieee80211_led_assoc(local, 0);
1455 changed |= BSS_CHANGED_ASSOC;
1456 sdata->vif.bss_conf.assoc = false;
1458 ieee80211_set_wmm_default(sdata);
1460 /* channel(_type) changes are handled by ieee80211_hw_config */
1461 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1463 /* on the next assoc, re-program HT parameters */
1464 sdata->ht_opmode_valid = false;
1465 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1466 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1468 local->power_constr_level = 0;
1470 del_timer_sync(&local->dynamic_ps_timer);
1471 cancel_work_sync(&local->dynamic_ps_enable_work);
1473 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1474 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1475 config_changed |= IEEE80211_CONF_CHANGE_PS;
1477 local->ps_sdata = NULL;
1479 ieee80211_hw_config(local, config_changed);
1481 /* Disable ARP filtering */
1482 if (sdata->vif.bss_conf.arp_filter_enabled) {
1483 sdata->vif.bss_conf.arp_filter_enabled = false;
1484 changed |= BSS_CHANGED_ARP_FILTER;
1487 /* The BSSID (not really interesting) and HT changed */
1488 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1489 ieee80211_bss_info_change_notify(sdata, changed);
1491 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1492 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1493 del_timer_sync(&sdata->u.mgd.timer);
1494 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1497 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1498 struct ieee80211_hdr *hdr)
1501 * We can postpone the mgd.timer whenever receiving unicast frames
1502 * from AP because we know that the connection is working both ways
1503 * at that time. But multicast frames (and hence also beacons) must
1504 * be ignored here, because we need to trigger the timer during
1505 * data idle periods for sending the periodic probe request to the
1506 * AP we're connected to.
1508 if (is_multicast_ether_addr(hdr->addr1))
1511 ieee80211_sta_reset_conn_monitor(sdata);
1514 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1516 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1518 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1519 IEEE80211_STA_CONNECTION_POLL)))
1522 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1523 IEEE80211_STA_BEACON_POLL);
1524 mutex_lock(&sdata->local->iflist_mtx);
1525 ieee80211_recalc_ps(sdata->local, -1);
1526 mutex_unlock(&sdata->local->iflist_mtx);
1528 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1532 * We've received a probe response, but are not sure whether
1533 * we have or will be receiving any beacons or data, so let's
1534 * schedule the timers again, just in case.
1536 ieee80211_sta_reset_beacon_monitor(sdata);
1538 mod_timer(&ifmgd->conn_mon_timer,
1539 round_jiffies_up(jiffies +
1540 IEEE80211_CONNECTION_IDLE_TIME));
1543 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1544 struct ieee80211_hdr *hdr, bool ack)
1546 if (!ieee80211_is_data(hdr->frame_control))
1550 ieee80211_sta_reset_conn_monitor(sdata);
1552 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1553 sdata->u.mgd.probe_send_count > 0) {
1555 sdata->u.mgd.probe_send_count = 0;
1557 sdata->u.mgd.nullfunc_failed = true;
1558 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1562 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1564 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1566 u8 *dst = ifmgd->associated->bssid;
1567 u8 unicast_limit = max(1, max_probe_tries - 3);
1570 * Try sending broadcast probe requests for the last three
1571 * probe requests after the first ones failed since some
1572 * buggy APs only support broadcast probe requests.
1574 if (ifmgd->probe_send_count >= unicast_limit)
1578 * When the hardware reports an accurate Tx ACK status, it's
1579 * better to send a nullfunc frame instead of a probe request,
1580 * as it will kick us off the AP quickly if we aren't associated
1581 * anymore. The timeout will be reset if the frame is ACKed by
1584 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1585 ifmgd->nullfunc_failed = false;
1586 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1588 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1589 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
1590 (u32) -1, true, false);
1593 ifmgd->probe_send_count++;
1594 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1595 run_again(ifmgd, ifmgd->probe_timeout);
1598 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1601 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1602 bool already = false;
1604 if (!ieee80211_sdata_running(sdata))
1607 if (sdata->local->scanning)
1610 if (sdata->local->tmp_channel)
1613 mutex_lock(&ifmgd->mtx);
1615 if (!ifmgd->associated)
1618 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1619 if (beacon && net_ratelimit())
1620 printk(KERN_DEBUG "%s: detected beacon loss from AP "
1621 "- sending probe request\n", sdata->name);
1625 * The driver/our work has already reported this event or the
1626 * connection monitoring has kicked in and we have already sent
1627 * a probe request. Or maybe the AP died and the driver keeps
1628 * reporting until we disassociate...
1630 * In either case we have to ignore the current call to this
1631 * function (except for setting the correct probe reason bit)
1632 * because otherwise we would reset the timer every time and
1633 * never check whether we received a probe response!
1635 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1636 IEEE80211_STA_CONNECTION_POLL))
1640 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1642 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1647 mutex_lock(&sdata->local->iflist_mtx);
1648 ieee80211_recalc_ps(sdata->local, -1);
1649 mutex_unlock(&sdata->local->iflist_mtx);
1651 ifmgd->probe_send_count = 0;
1652 ieee80211_mgd_probe_ap_send(sdata);
1654 mutex_unlock(&ifmgd->mtx);
1657 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1658 struct ieee80211_vif *vif)
1660 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1661 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1662 struct sk_buff *skb;
1665 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1668 ASSERT_MGD_MTX(ifmgd);
1670 if (!ifmgd->associated)
1673 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1674 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1675 (u32) -1, ssid + 2, ssid[1],
1680 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1682 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1684 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1685 struct ieee80211_local *local = sdata->local;
1687 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1689 mutex_lock(&ifmgd->mtx);
1690 if (!ifmgd->associated) {
1691 mutex_unlock(&ifmgd->mtx);
1695 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1697 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1698 sdata->name, bssid);
1700 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1701 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1703 mutex_unlock(&ifmgd->mtx);
1706 * must be outside lock due to cfg80211,
1707 * but that's not a problem.
1709 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
1711 mutex_lock(&local->mtx);
1712 ieee80211_recalc_idle(local);
1713 mutex_unlock(&local->mtx);
1716 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1718 struct ieee80211_sub_if_data *sdata =
1719 container_of(work, struct ieee80211_sub_if_data,
1720 u.mgd.beacon_connection_loss_work);
1721 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1722 struct sta_info *sta;
1724 if (ifmgd->associated) {
1726 sta = sta_info_get(sdata, ifmgd->bssid);
1728 sta->beacon_loss_count++;
1732 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1733 __ieee80211_connection_loss(sdata);
1735 ieee80211_mgd_probe_ap(sdata, true);
1738 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1740 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1741 struct ieee80211_hw *hw = &sdata->local->hw;
1743 trace_api_beacon_loss(sdata);
1745 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1746 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1748 EXPORT_SYMBOL(ieee80211_beacon_loss);
1750 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1752 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1753 struct ieee80211_hw *hw = &sdata->local->hw;
1755 trace_api_connection_loss(sdata);
1757 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1758 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1760 EXPORT_SYMBOL(ieee80211_connection_loss);
1763 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1766 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1768 lockdep_assert_held(&sdata->u.mgd.mtx);
1770 if (auth_data->synced)
1771 drv_finish_tx_sync(sdata->local, sdata,
1772 auth_data->bss->bssid,
1773 IEEE80211_TX_SYNC_AUTH);
1776 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1778 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1779 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1782 cfg80211_put_bss(auth_data->bss);
1784 sdata->u.mgd.auth_data = NULL;
1787 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1788 struct ieee80211_mgmt *mgmt, size_t len)
1790 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1792 struct ieee802_11_elems elems;
1794 pos = mgmt->u.auth.variable;
1795 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1796 if (!elems.challenge)
1798 auth_data->expected_transaction = 4;
1799 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1800 elems.challenge - 2, elems.challenge_len + 2,
1801 auth_data->bss->bssid, auth_data->bss->bssid,
1802 auth_data->key, auth_data->key_len,
1803 auth_data->key_idx);
1806 static enum rx_mgmt_action __must_check
1807 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1808 struct ieee80211_mgmt *mgmt, size_t len)
1810 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1812 u16 auth_alg, auth_transaction, status_code;
1813 struct sta_info *sta;
1815 lockdep_assert_held(&ifmgd->mtx);
1818 return RX_MGMT_NONE;
1820 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1821 return RX_MGMT_NONE;
1823 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1825 if (memcmp(bssid, mgmt->bssid, ETH_ALEN))
1826 return RX_MGMT_NONE;
1828 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1829 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1830 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1832 if (auth_alg != ifmgd->auth_data->algorithm ||
1833 auth_transaction != ifmgd->auth_data->expected_transaction)
1834 return RX_MGMT_NONE;
1836 if (status_code != WLAN_STATUS_SUCCESS) {
1837 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1838 sdata->name, mgmt->sa, status_code);
1842 switch (ifmgd->auth_data->algorithm) {
1843 case WLAN_AUTH_OPEN:
1844 case WLAN_AUTH_LEAP:
1847 case WLAN_AUTH_SHARED_KEY:
1848 if (ifmgd->auth_data->expected_transaction != 4) {
1849 ieee80211_auth_challenge(sdata, mgmt, len);
1850 /* need another frame */
1851 return RX_MGMT_NONE;
1855 WARN_ONCE(1, "invalid auth alg %d",
1856 ifmgd->auth_data->algorithm);
1857 return RX_MGMT_NONE;
1860 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1862 if (ifmgd->auth_data->synced)
1863 drv_finish_tx_sync(sdata->local, sdata, bssid,
1864 IEEE80211_TX_SYNC_AUTH);
1865 ifmgd->auth_data->synced = false;
1866 ifmgd->auth_data->done = true;
1867 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1868 run_again(ifmgd, ifmgd->auth_data->timeout);
1870 /* move station state to auth */
1871 mutex_lock(&sdata->local->sta_mtx);
1872 sta = sta_info_get(sdata, bssid);
1874 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1877 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1878 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1879 sdata->name, bssid);
1882 mutex_unlock(&sdata->local->sta_mtx);
1884 return RX_MGMT_CFG80211_RX_AUTH;
1886 mutex_unlock(&sdata->local->sta_mtx);
1887 /* ignore frame -- wait for timeout */
1888 return RX_MGMT_NONE;
1892 static enum rx_mgmt_action __must_check
1893 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1894 struct ieee80211_mgmt *mgmt, size_t len)
1896 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1897 const u8 *bssid = NULL;
1900 lockdep_assert_held(&ifmgd->mtx);
1903 return RX_MGMT_NONE;
1905 if (!ifmgd->associated ||
1906 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
1907 return RX_MGMT_NONE;
1909 bssid = ifmgd->associated->bssid;
1911 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1913 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1914 sdata->name, bssid, reason_code);
1916 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1918 mutex_lock(&sdata->local->mtx);
1919 ieee80211_recalc_idle(sdata->local);
1920 mutex_unlock(&sdata->local->mtx);
1922 return RX_MGMT_CFG80211_DEAUTH;
1926 static enum rx_mgmt_action __must_check
1927 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1928 struct ieee80211_mgmt *mgmt, size_t len)
1930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1933 lockdep_assert_held(&ifmgd->mtx);
1936 return RX_MGMT_NONE;
1938 if (!ifmgd->associated ||
1939 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
1940 return RX_MGMT_NONE;
1942 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1944 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1945 sdata->name, mgmt->sa, reason_code);
1947 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1949 mutex_lock(&sdata->local->mtx);
1950 ieee80211_recalc_idle(sdata->local);
1951 mutex_unlock(&sdata->local->mtx);
1953 return RX_MGMT_CFG80211_DISASSOC;
1956 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1957 u8 *supp_rates, unsigned int supp_rates_len,
1958 u32 *rates, u32 *basic_rates,
1959 bool *have_higher_than_11mbit,
1960 int *min_rate, int *min_rate_index)
1964 for (i = 0; i < supp_rates_len; i++) {
1965 int rate = (supp_rates[i] & 0x7f) * 5;
1966 bool is_basic = !!(supp_rates[i] & 0x80);
1969 *have_higher_than_11mbit = true;
1972 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1973 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1975 * Note: Even through the membership selector and the basic
1976 * rate flag share the same bit, they are not exactly
1979 if (!!(supp_rates[i] & 0x80) &&
1980 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1983 for (j = 0; j < sband->n_bitrates; j++) {
1984 if (sband->bitrates[j].bitrate == rate) {
1987 *basic_rates |= BIT(j);
1988 if (rate < *min_rate) {
1990 *min_rate_index = j;
1998 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2001 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2003 lockdep_assert_held(&sdata->u.mgd.mtx);
2005 if (assoc_data->synced)
2006 drv_finish_tx_sync(sdata->local, sdata,
2007 assoc_data->bss->bssid,
2008 IEEE80211_TX_SYNC_ASSOC);
2011 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2013 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2014 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2018 sdata->u.mgd.assoc_data = NULL;
2021 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2022 struct cfg80211_bss *cbss,
2023 struct ieee80211_mgmt *mgmt, size_t len)
2025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2026 struct ieee80211_local *local = sdata->local;
2027 struct ieee80211_supported_band *sband;
2028 struct sta_info *sta;
2030 u32 rates, basic_rates;
2031 u16 capab_info, aid;
2032 struct ieee802_11_elems elems;
2033 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2036 bool have_higher_than_11mbit = false;
2037 u16 ap_ht_cap_flags;
2038 int min_rate = INT_MAX, min_rate_index = -1;
2040 /* AssocResp and ReassocResp have identical structure */
2042 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2043 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2045 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2047 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2049 aid &= ~(BIT(15) | BIT(14));
2051 ifmgd->broken_ap = false;
2053 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2055 "%s: invalid AID value %d (out of range), turn off PS\n",
2058 ifmgd->broken_ap = true;
2061 pos = mgmt->u.assoc_resp.variable;
2062 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2064 if (!elems.supp_rates) {
2065 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2072 mutex_lock(&sdata->local->sta_mtx);
2074 * station info was already allocated and inserted before
2075 * the association and should be available to us
2077 sta = sta_info_get(sdata, cbss->bssid);
2078 if (WARN_ON(!sta)) {
2079 mutex_unlock(&sdata->local->sta_mtx);
2085 sband = local->hw.wiphy->bands[local->oper_channel->band];
2087 ieee80211_get_rates(sband, elems.supp_rates, elems.supp_rates_len,
2088 &rates, &basic_rates, &have_higher_than_11mbit,
2089 &min_rate, &min_rate_index);
2091 ieee80211_get_rates(sband, elems.ext_supp_rates,
2092 elems.ext_supp_rates_len, &rates, &basic_rates,
2093 &have_higher_than_11mbit,
2094 &min_rate, &min_rate_index);
2097 * some buggy APs don't advertise basic_rates. use the lowest
2098 * supported rate instead.
2100 if (unlikely(!basic_rates) && min_rate_index >= 0) {
2101 printk(KERN_DEBUG "%s: No basic rates in AssocResp. "
2102 "Using min supported rate instead.\n", sdata->name);
2103 basic_rates = BIT(min_rate_index);
2106 sta->sta.supp_rates[local->oper_channel->band] = rates;
2107 sdata->vif.bss_conf.basic_rates = basic_rates;
2109 /* cf. IEEE 802.11 9.2.12 */
2110 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
2111 have_higher_than_11mbit)
2112 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2114 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2116 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2117 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2118 elems.ht_cap_elem, &sta->sta.ht_cap);
2120 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2122 rate_control_rate_init(sta);
2124 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2125 set_sta_flag(sta, WLAN_STA_MFP);
2127 if (elems.wmm_param)
2128 set_sta_flag(sta, WLAN_STA_WME);
2130 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2132 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2133 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2134 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2137 "%s: failed to move station %pM to desired state\n",
2138 sdata->name, sta->sta.addr);
2139 WARN_ON(__sta_info_destroy(sta));
2140 mutex_unlock(&sdata->local->sta_mtx);
2144 mutex_unlock(&sdata->local->sta_mtx);
2147 * Always handle WMM once after association regardless
2148 * of the first value the AP uses. Setting -1 here has
2149 * that effect because the AP values is an unsigned
2152 ifmgd->wmm_last_param_set = -1;
2154 if (elems.wmm_param)
2155 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2156 elems.wmm_param_len);
2158 ieee80211_set_wmm_default(sdata);
2160 if (elems.ht_info_elem && elems.wmm_param &&
2161 (sdata->local->hw.queues >= 4) &&
2162 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2163 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
2164 cbss->bssid, ap_ht_cap_flags,
2167 /* set AID and assoc capability,
2168 * ieee80211_set_associated() will tell the driver */
2169 bss_conf->aid = aid;
2170 bss_conf->assoc_capability = capab_info;
2171 ieee80211_set_associated(sdata, cbss, changed);
2174 * If we're using 4-addr mode, let the AP know that we're
2175 * doing so, so that it can create the STA VLAN on its side
2177 if (ifmgd->use_4addr)
2178 ieee80211_send_4addr_nullfunc(local, sdata);
2181 * Start timer to probe the connection to the AP now.
2182 * Also start the timer that will detect beacon loss.
2184 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2185 ieee80211_sta_reset_beacon_monitor(sdata);
2190 static enum rx_mgmt_action __must_check
2191 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2192 struct ieee80211_mgmt *mgmt, size_t len,
2193 struct cfg80211_bss **bss)
2195 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2196 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2197 u16 capab_info, status_code, aid;
2198 struct ieee802_11_elems elems;
2202 lockdep_assert_held(&ifmgd->mtx);
2205 return RX_MGMT_NONE;
2206 if (memcmp(assoc_data->bss->bssid, mgmt->bssid, ETH_ALEN))
2207 return RX_MGMT_NONE;
2210 * AssocResp and ReassocResp have identical structure, so process both
2211 * of them in this function.
2215 return RX_MGMT_NONE;
2217 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2218 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2219 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2220 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2222 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2223 "status=%d aid=%d)\n",
2224 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2225 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2227 pos = mgmt->u.assoc_resp.variable;
2228 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2230 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2231 elems.timeout_int && elems.timeout_int_len == 5 &&
2232 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2234 tu = get_unaligned_le32(elems.timeout_int + 1);
2235 ms = tu * 1024 / 1000;
2236 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2237 "comeback duration %u TU (%u ms)\n",
2238 sdata->name, mgmt->sa, tu, ms);
2239 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2240 if (ms > IEEE80211_ASSOC_TIMEOUT)
2241 run_again(ifmgd, assoc_data->timeout);
2242 return RX_MGMT_NONE;
2245 *bss = assoc_data->bss;
2247 if (status_code != WLAN_STATUS_SUCCESS) {
2248 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2249 sdata->name, mgmt->sa, status_code);
2250 ieee80211_destroy_assoc_data(sdata, false);
2252 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2254 /* tell driver about sync done first */
2255 if (assoc_data->synced) {
2256 drv_finish_tx_sync(sdata->local, sdata,
2257 assoc_data->bss->bssid,
2258 IEEE80211_TX_SYNC_ASSOC);
2259 assoc_data->synced = false;
2262 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2263 /* oops -- internal error -- send timeout for now */
2264 ieee80211_destroy_assoc_data(sdata, true);
2265 sta_info_destroy_addr(sdata, mgmt->bssid);
2266 cfg80211_put_bss(*bss);
2267 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2271 * destroy assoc_data afterwards, as otherwise an idle
2272 * recalc after assoc_data is NULL but before associated
2273 * is set can cause the interface to go idle
2275 ieee80211_destroy_assoc_data(sdata, true);
2278 return RX_MGMT_CFG80211_RX_ASSOC;
2280 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2281 struct ieee80211_mgmt *mgmt,
2283 struct ieee80211_rx_status *rx_status,
2284 struct ieee802_11_elems *elems,
2287 struct ieee80211_local *local = sdata->local;
2289 struct ieee80211_bss *bss;
2290 struct ieee80211_channel *channel;
2291 bool need_ps = false;
2293 if (sdata->u.mgd.associated &&
2294 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
2296 bss = (void *)sdata->u.mgd.associated->priv;
2297 /* not previously set so we may need to recalc */
2298 need_ps = !bss->dtim_period;
2301 if (elems->ds_params && elems->ds_params_len == 1)
2302 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2305 freq = rx_status->freq;
2307 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2309 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2312 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2315 ieee80211_rx_bss_put(local, bss);
2317 if (!sdata->u.mgd.associated)
2321 mutex_lock(&local->iflist_mtx);
2322 ieee80211_recalc_ps(local, -1);
2323 mutex_unlock(&local->iflist_mtx);
2326 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
2327 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
2329 struct ieee80211_channel_sw_ie *sw_elem =
2330 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
2331 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2332 bss, rx_status->mactime);
2337 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2338 struct sk_buff *skb)
2340 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2341 struct ieee80211_if_managed *ifmgd;
2342 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2343 size_t baselen, len = skb->len;
2344 struct ieee802_11_elems elems;
2346 ifmgd = &sdata->u.mgd;
2348 ASSERT_MGD_MTX(ifmgd);
2350 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
2351 return; /* ignore ProbeResp to foreign address */
2353 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2357 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2360 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2362 if (ifmgd->associated &&
2363 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
2364 ieee80211_reset_ap_probe(sdata);
2366 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2367 memcmp(mgmt->bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN) == 0) {
2368 /* got probe response, continue with auth */
2369 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2370 ifmgd->auth_data->tries = 0;
2371 ifmgd->auth_data->timeout = jiffies;
2372 run_again(ifmgd, ifmgd->auth_data->timeout);
2377 * This is the canonical list of information elements we care about,
2378 * the filter code also gives us all changes to the Microsoft OUI
2379 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2381 * We implement beacon filtering in software since that means we can
2382 * avoid processing the frame here and in cfg80211, and userspace
2383 * will not be able to tell whether the hardware supports it or not.
2385 * XXX: This list needs to be dynamic -- userspace needs to be able to
2386 * add items it requires. It also needs to be able to tell us to
2387 * look out for other vendor IEs.
2389 static const u64 care_about_ies =
2390 (1ULL << WLAN_EID_COUNTRY) |
2391 (1ULL << WLAN_EID_ERP_INFO) |
2392 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2393 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2394 (1ULL << WLAN_EID_HT_CAPABILITY) |
2395 (1ULL << WLAN_EID_HT_INFORMATION);
2397 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2398 struct ieee80211_mgmt *mgmt,
2400 struct ieee80211_rx_status *rx_status)
2402 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2403 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2405 struct ieee802_11_elems elems;
2406 struct ieee80211_local *local = sdata->local;
2408 bool erp_valid, directed_tim = false;
2413 lockdep_assert_held(&ifmgd->mtx);
2415 /* Process beacon from the current BSS */
2416 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2420 if (rx_status->freq != local->hw.conf.channel->center_freq)
2423 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2424 memcmp(mgmt->bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN) == 0) {
2425 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2426 len - baselen, &elems);
2428 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2430 ifmgd->assoc_data->have_beacon = true;
2431 ifmgd->assoc_data->sent_assoc = false;
2432 /* continue assoc process */
2433 ifmgd->assoc_data->timeout = jiffies;
2434 run_again(ifmgd, ifmgd->assoc_data->timeout);
2438 if (!ifmgd->associated ||
2439 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
2441 bssid = ifmgd->associated->bssid;
2443 /* Track average RSSI from the Beacon frames of the current AP */
2444 ifmgd->last_beacon_signal = rx_status->signal;
2445 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2446 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2447 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2448 ifmgd->last_cqm_event_signal = 0;
2449 ifmgd->count_beacon_signal = 1;
2450 ifmgd->last_ave_beacon_signal = 0;
2452 ifmgd->ave_beacon_signal =
2453 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2454 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2455 ifmgd->ave_beacon_signal) / 16;
2456 ifmgd->count_beacon_signal++;
2459 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2460 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2461 int sig = ifmgd->ave_beacon_signal;
2462 int last_sig = ifmgd->last_ave_beacon_signal;
2465 * if signal crosses either of the boundaries, invoke callback
2466 * with appropriate parameters
2468 if (sig > ifmgd->rssi_max_thold &&
2469 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2470 ifmgd->last_ave_beacon_signal = sig;
2471 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2472 } else if (sig < ifmgd->rssi_min_thold &&
2473 (last_sig >= ifmgd->rssi_max_thold ||
2475 ifmgd->last_ave_beacon_signal = sig;
2476 drv_rssi_callback(local, RSSI_EVENT_LOW);
2480 if (bss_conf->cqm_rssi_thold &&
2481 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2482 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2483 int sig = ifmgd->ave_beacon_signal / 16;
2484 int last_event = ifmgd->last_cqm_event_signal;
2485 int thold = bss_conf->cqm_rssi_thold;
2486 int hyst = bss_conf->cqm_rssi_hyst;
2488 (last_event == 0 || sig < last_event - hyst)) {
2489 ifmgd->last_cqm_event_signal = sig;
2490 ieee80211_cqm_rssi_notify(
2492 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2494 } else if (sig > thold &&
2495 (last_event == 0 || sig > last_event + hyst)) {
2496 ifmgd->last_cqm_event_signal = sig;
2497 ieee80211_cqm_rssi_notify(
2499 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2504 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2505 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2506 if (net_ratelimit()) {
2507 printk(KERN_DEBUG "%s: cancelling probereq poll due "
2508 "to a received beacon\n", sdata->name);
2511 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2512 mutex_lock(&local->iflist_mtx);
2513 ieee80211_recalc_ps(local, -1);
2514 mutex_unlock(&local->iflist_mtx);
2518 * Push the beacon loss detection into the future since
2519 * we are processing a beacon from the AP just now.
2521 ieee80211_sta_reset_beacon_monitor(sdata);
2523 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2524 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2525 len - baselen, &elems,
2526 care_about_ies, ncrc);
2528 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2529 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2532 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
2533 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2536 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2537 elems.wmm_param_len);
2540 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2542 if (local->hw.conf.dynamic_ps_timeout > 0) {
2543 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2544 ieee80211_hw_config(local,
2545 IEEE80211_CONF_CHANGE_PS);
2546 ieee80211_send_nullfunc(local, sdata, 0);
2548 local->pspolling = true;
2551 * Here is assumed that the driver will be
2552 * able to send ps-poll frame and receive a
2553 * response even though power save mode is
2554 * enabled, but some drivers might require
2555 * to disable power save here. This needs
2556 * to be investigated.
2558 ieee80211_send_pspoll(local, sdata);
2563 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2565 ifmgd->beacon_crc = ncrc;
2566 ifmgd->beacon_crc_valid = true;
2568 if (elems.erp_info && elems.erp_info_len >= 1) {
2570 erp_value = elems.erp_info[0];
2574 changed |= ieee80211_handle_bss_capability(sdata,
2575 le16_to_cpu(mgmt->u.beacon.capab_info),
2576 erp_valid, erp_value);
2579 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2580 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
2581 struct sta_info *sta;
2582 struct ieee80211_supported_band *sband;
2583 u16 ap_ht_cap_flags;
2587 sta = sta_info_get(sdata, bssid);
2588 if (WARN_ON(!sta)) {
2593 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2595 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2596 elems.ht_cap_elem, &sta->sta.ht_cap);
2598 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2602 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
2603 bssid, ap_ht_cap_flags, true);
2606 /* Note: country IE parsing is done for us by cfg80211 */
2607 if (elems.country_elem) {
2608 /* TODO: IBSS also needs this */
2609 if (elems.pwr_constr_elem)
2610 ieee80211_handle_pwr_constr(sdata,
2611 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2612 elems.pwr_constr_elem,
2613 elems.pwr_constr_elem_len);
2616 ieee80211_bss_info_change_notify(sdata, changed);
2619 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2620 struct sk_buff *skb)
2622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2623 struct ieee80211_rx_status *rx_status;
2624 struct ieee80211_mgmt *mgmt;
2625 struct cfg80211_bss *bss = NULL;
2626 enum rx_mgmt_action rma = RX_MGMT_NONE;
2629 rx_status = (struct ieee80211_rx_status *) skb->cb;
2630 mgmt = (struct ieee80211_mgmt *) skb->data;
2631 fc = le16_to_cpu(mgmt->frame_control);
2633 mutex_lock(&ifmgd->mtx);
2635 switch (fc & IEEE80211_FCTL_STYPE) {
2636 case IEEE80211_STYPE_BEACON:
2637 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2639 case IEEE80211_STYPE_PROBE_RESP:
2640 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2642 case IEEE80211_STYPE_AUTH:
2643 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2645 case IEEE80211_STYPE_DEAUTH:
2646 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2648 case IEEE80211_STYPE_DISASSOC:
2649 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2651 case IEEE80211_STYPE_ASSOC_RESP:
2652 case IEEE80211_STYPE_REASSOC_RESP:
2653 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2655 case IEEE80211_STYPE_ACTION:
2656 switch (mgmt->u.action.category) {
2657 case WLAN_CATEGORY_SPECTRUM_MGMT:
2658 ieee80211_sta_process_chanswitch(sdata,
2659 &mgmt->u.action.u.chan_switch.sw_elem,
2660 (void *)ifmgd->associated->priv,
2661 rx_status->mactime);
2665 mutex_unlock(&ifmgd->mtx);
2671 case RX_MGMT_CFG80211_DEAUTH:
2672 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2674 case RX_MGMT_CFG80211_DISASSOC:
2675 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2677 case RX_MGMT_CFG80211_RX_AUTH:
2678 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2680 case RX_MGMT_CFG80211_RX_ASSOC:
2681 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2683 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2684 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2687 WARN(1, "unexpected: %d", rma);
2691 static void ieee80211_sta_timer(unsigned long data)
2693 struct ieee80211_sub_if_data *sdata =
2694 (struct ieee80211_sub_if_data *) data;
2695 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2696 struct ieee80211_local *local = sdata->local;
2698 if (local->quiescing) {
2699 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2703 ieee80211_queue_work(&local->hw, &sdata->work);
2706 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2707 u8 *bssid, u8 reason)
2709 struct ieee80211_local *local = sdata->local;
2710 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2711 u8 frame_buf[DEAUTH_DISASSOC_LEN];
2713 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2714 IEEE80211_STA_BEACON_POLL);
2716 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2718 mutex_unlock(&ifmgd->mtx);
2721 * must be outside lock due to cfg80211,
2722 * but that's not a problem.
2724 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
2726 mutex_lock(&local->mtx);
2727 ieee80211_recalc_idle(local);
2728 mutex_unlock(&local->mtx);
2730 mutex_lock(&ifmgd->mtx);
2733 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2735 struct ieee80211_local *local = sdata->local;
2736 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2737 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2739 lockdep_assert_held(&ifmgd->mtx);
2741 if (WARN_ON_ONCE(!auth_data))
2744 if (!auth_data->synced) {
2745 int ret = drv_tx_sync(local, sdata, auth_data->bss->bssid,
2746 IEEE80211_TX_SYNC_AUTH);
2750 auth_data->synced = true;
2754 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2755 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2756 sdata->name, auth_data->bss->bssid);
2759 * Most likely AP is not in the range so remove the
2760 * bss struct for that AP.
2762 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2767 if (auth_data->bss->proberesp_ies) {
2768 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2769 sdata->name, auth_data->bss->bssid, auth_data->tries,
2770 IEEE80211_AUTH_MAX_TRIES);
2772 auth_data->expected_transaction = 2;
2773 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2774 auth_data->ie, auth_data->ie_len,
2775 auth_data->bss->bssid,
2776 auth_data->bss->bssid, NULL, 0, 0);
2780 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2781 sdata->name, auth_data->bss->bssid, auth_data->tries,
2782 IEEE80211_AUTH_MAX_TRIES);
2784 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2788 * Direct probe is sent to broadcast address as some APs
2789 * will not answer to direct packet in unassociated state.
2791 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2792 NULL, 0, (u32) -1, true, false);
2795 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2796 run_again(ifmgd, auth_data->timeout);
2801 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2803 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2804 struct ieee80211_local *local = sdata->local;
2806 lockdep_assert_held(&sdata->u.mgd.mtx);
2808 if (!assoc_data->synced) {
2809 int ret = drv_tx_sync(local, sdata, assoc_data->bss->bssid,
2810 IEEE80211_TX_SYNC_ASSOC);
2814 assoc_data->synced = true;
2816 assoc_data->tries++;
2817 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2818 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2819 sdata->name, assoc_data->bss->bssid);
2822 * Most likely AP is not in the range so remove the
2823 * bss struct for that AP.
2825 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2830 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2831 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2832 IEEE80211_ASSOC_MAX_TRIES);
2833 ieee80211_send_assoc(sdata);
2835 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2836 run_again(&sdata->u.mgd, assoc_data->timeout);
2841 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2843 struct ieee80211_local *local = sdata->local;
2844 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2846 mutex_lock(&ifmgd->mtx);
2848 if (ifmgd->auth_data &&
2849 time_after(jiffies, ifmgd->auth_data->timeout)) {
2850 if (ifmgd->auth_data->done) {
2852 * ok ... we waited for assoc but userspace didn't,
2853 * so let's just kill the auth data
2855 ieee80211_destroy_auth_data(sdata, false);
2856 } else if (ieee80211_probe_auth(sdata)) {
2859 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2861 ieee80211_destroy_auth_data(sdata, false);
2863 mutex_unlock(&ifmgd->mtx);
2864 cfg80211_send_auth_timeout(sdata->dev, bssid);
2865 mutex_lock(&ifmgd->mtx);
2867 } else if (ifmgd->auth_data)
2868 run_again(ifmgd, ifmgd->auth_data->timeout);
2870 if (ifmgd->assoc_data &&
2871 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2872 if (!ifmgd->assoc_data->have_beacon ||
2873 ieee80211_do_assoc(sdata)) {
2876 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2878 ieee80211_destroy_assoc_data(sdata, false);
2880 mutex_unlock(&ifmgd->mtx);
2881 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2882 mutex_lock(&ifmgd->mtx);
2884 } else if (ifmgd->assoc_data)
2885 run_again(ifmgd, ifmgd->assoc_data->timeout);
2887 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2888 IEEE80211_STA_CONNECTION_POLL) &&
2889 ifmgd->associated) {
2893 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2895 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2896 max_tries = max_nullfunc_tries;
2898 max_tries = max_probe_tries;
2900 /* ACK received for nullfunc probing frame */
2901 if (!ifmgd->probe_send_count)
2902 ieee80211_reset_ap_probe(sdata);
2903 else if (ifmgd->nullfunc_failed) {
2904 if (ifmgd->probe_send_count < max_tries) {
2905 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2906 wiphy_debug(local->hw.wiphy,
2907 "%s: No ack for nullfunc frame to"
2908 " AP %pM, try %d/%i\n",
2910 ifmgd->probe_send_count, max_tries);
2912 ieee80211_mgd_probe_ap_send(sdata);
2914 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2915 wiphy_debug(local->hw.wiphy,
2916 "%s: No ack for nullfunc frame to"
2917 " AP %pM, disconnecting.\n",
2918 sdata->name, bssid);
2920 ieee80211_sta_connection_lost(sdata, bssid,
2921 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2923 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2924 run_again(ifmgd, ifmgd->probe_timeout);
2925 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2926 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2927 wiphy_debug(local->hw.wiphy,
2928 "%s: Failed to send nullfunc to AP %pM"
2929 " after %dms, disconnecting.\n",
2931 bssid, probe_wait_ms);
2933 ieee80211_sta_connection_lost(sdata, bssid,
2934 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2935 } else if (ifmgd->probe_send_count < max_tries) {
2936 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2937 wiphy_debug(local->hw.wiphy,
2938 "%s: No probe response from AP %pM"
2939 " after %dms, try %d/%i\n",
2941 bssid, probe_wait_ms,
2942 ifmgd->probe_send_count, max_tries);
2944 ieee80211_mgd_probe_ap_send(sdata);
2947 * We actually lost the connection ... or did we?
2950 wiphy_debug(local->hw.wiphy,
2951 "%s: No probe response from AP %pM"
2952 " after %dms, disconnecting.\n",
2954 bssid, probe_wait_ms);
2956 ieee80211_sta_connection_lost(sdata, bssid,
2957 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2961 mutex_unlock(&ifmgd->mtx);
2963 mutex_lock(&local->mtx);
2964 ieee80211_recalc_idle(local);
2965 mutex_unlock(&local->mtx);
2968 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2970 struct ieee80211_sub_if_data *sdata =
2971 (struct ieee80211_sub_if_data *) data;
2972 struct ieee80211_local *local = sdata->local;
2974 if (local->quiescing)
2977 ieee80211_queue_work(&sdata->local->hw,
2978 &sdata->u.mgd.beacon_connection_loss_work);
2981 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2983 struct ieee80211_sub_if_data *sdata =
2984 (struct ieee80211_sub_if_data *) data;
2985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2986 struct ieee80211_local *local = sdata->local;
2988 if (local->quiescing)
2991 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2994 static void ieee80211_sta_monitor_work(struct work_struct *work)
2996 struct ieee80211_sub_if_data *sdata =
2997 container_of(work, struct ieee80211_sub_if_data,
2998 u.mgd.monitor_work);
3000 ieee80211_mgd_probe_ap(sdata, false);
3003 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3007 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3008 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
3009 IEEE80211_STA_CONNECTION_POLL);
3011 /* let's probe the connection once */
3012 flags = sdata->local->hw.flags;
3013 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3014 ieee80211_queue_work(&sdata->local->hw,
3015 &sdata->u.mgd.monitor_work);
3016 /* and do all the other regular work too */
3017 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3022 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3027 * we need to use atomic bitops for the running bits
3028 * only because both timers might fire at the same
3029 * time -- the code here is properly synchronised.
3032 cancel_work_sync(&ifmgd->request_smps_work);
3034 cancel_work_sync(&ifmgd->monitor_work);
3035 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
3036 if (del_timer_sync(&ifmgd->timer))
3037 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3039 cancel_work_sync(&ifmgd->chswitch_work);
3040 if (del_timer_sync(&ifmgd->chswitch_timer))
3041 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
3043 /* these will just be re-established on connection */
3044 del_timer_sync(&ifmgd->conn_mon_timer);
3045 del_timer_sync(&ifmgd->bcn_mon_timer);
3048 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3050 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3052 if (!ifmgd->associated)
3055 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3056 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3057 mutex_lock(&ifmgd->mtx);
3058 if (ifmgd->associated) {
3059 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
3060 wiphy_debug(sdata->local->hw.wiphy,
3061 "%s: driver requested disconnect after resume.\n",
3064 ieee80211_sta_connection_lost(sdata,
3065 ifmgd->associated->bssid,
3066 WLAN_REASON_UNSPECIFIED);
3067 mutex_unlock(&ifmgd->mtx);
3070 mutex_unlock(&ifmgd->mtx);
3073 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3074 add_timer(&ifmgd->timer);
3075 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3076 add_timer(&ifmgd->chswitch_timer);
3077 ieee80211_sta_reset_beacon_monitor(sdata);
3078 ieee80211_restart_sta_timer(sdata);
3082 /* interface setup */
3083 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3085 struct ieee80211_if_managed *ifmgd;
3087 ifmgd = &sdata->u.mgd;
3088 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3089 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3090 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3091 ieee80211_beacon_connection_loss_work);
3092 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3093 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3094 (unsigned long) sdata);
3095 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3096 (unsigned long) sdata);
3097 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3098 (unsigned long) sdata);
3099 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3100 (unsigned long) sdata);
3103 ifmgd->powersave = sdata->wdev.ps;
3105 mutex_init(&ifmgd->mtx);
3107 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3108 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3110 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3113 /* scan finished notification */
3114 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3116 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
3118 /* Restart STA timers */
3120 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3121 ieee80211_restart_sta_timer(sdata);
3125 int ieee80211_max_network_latency(struct notifier_block *nb,
3126 unsigned long data, void *dummy)
3128 s32 latency_usec = (s32) data;
3129 struct ieee80211_local *local =
3130 container_of(nb, struct ieee80211_local,
3131 network_latency_notifier);
3133 mutex_lock(&local->iflist_mtx);
3134 ieee80211_recalc_ps(local, latency_usec);
3135 mutex_unlock(&local->iflist_mtx);
3141 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3142 struct cfg80211_auth_request *req)
3144 struct ieee80211_local *local = sdata->local;
3145 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3146 struct ieee80211_mgd_auth_data *auth_data;
3147 struct sta_info *sta;
3151 /* prepare auth data structure */
3153 switch (req->auth_type) {
3154 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3155 auth_alg = WLAN_AUTH_OPEN;
3157 case NL80211_AUTHTYPE_SHARED_KEY:
3158 if (IS_ERR(local->wep_tx_tfm))
3160 auth_alg = WLAN_AUTH_SHARED_KEY;
3162 case NL80211_AUTHTYPE_FT:
3163 auth_alg = WLAN_AUTH_FT;
3165 case NL80211_AUTHTYPE_NETWORK_EAP:
3166 auth_alg = WLAN_AUTH_LEAP;
3172 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3176 auth_data->bss = req->bss;
3178 if (req->ie && req->ie_len) {
3179 memcpy(auth_data->ie, req->ie, req->ie_len);
3180 auth_data->ie_len = req->ie_len;
3183 if (req->key && req->key_len) {
3184 auth_data->key_len = req->key_len;
3185 auth_data->key_idx = req->key_idx;
3186 memcpy(auth_data->key, req->key, req->key_len);
3189 auth_data->algorithm = auth_alg;
3191 /* try to authenticate/probe */
3193 mutex_lock(&ifmgd->mtx);
3195 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3196 ifmgd->assoc_data) {
3201 if (ifmgd->auth_data)
3202 ieee80211_destroy_auth_data(sdata, false);
3204 /* prep auth_data so we don't go into idle on disassoc */
3205 ifmgd->auth_data = auth_data;
3207 if (ifmgd->associated)
3208 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3210 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3211 sdata->name, req->bss->bssid);
3213 mutex_lock(&local->mtx);
3214 ieee80211_recalc_idle(sdata->local);
3215 mutex_unlock(&local->mtx);
3217 /* switch to the right channel */
3218 local->oper_channel = req->bss->channel;
3219 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3222 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3223 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3225 /* add station entry */
3226 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3232 err = sta_info_insert(sta);
3235 "%s: failed to insert STA entry for the AP %pM (error %d)\n",
3236 sdata->name, req->bss->bssid, err);
3240 err = ieee80211_probe_auth(sdata);
3242 if (auth_data->synced)
3243 drv_finish_tx_sync(local, sdata, req->bss->bssid,
3244 IEEE80211_TX_SYNC_AUTH);
3245 sta_info_destroy_addr(sdata, req->bss->bssid);
3249 /* hold our own reference */
3250 cfg80211_ref_bss(auth_data->bss);
3255 ifmgd->auth_data = NULL;
3259 mutex_unlock(&ifmgd->mtx);
3264 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3265 struct cfg80211_assoc_request *req)
3267 struct ieee80211_local *local = sdata->local;
3268 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3269 struct ieee80211_bss *bss = (void *)req->bss->priv;
3270 struct ieee80211_mgd_assoc_data *assoc_data;
3271 struct sta_info *sta;
3275 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3279 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3283 mutex_lock(&ifmgd->mtx);
3285 if (ifmgd->associated)
3286 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3288 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3293 if (ifmgd->assoc_data) {
3298 if (ifmgd->auth_data) {
3301 /* keep sta info, bssid if matching */
3302 match = memcmp(ifmgd->bssid, req->bss->bssid, ETH_ALEN) == 0;
3303 ieee80211_destroy_auth_data(sdata, match);
3306 /* prepare assoc data */
3308 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
3309 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
3311 ifmgd->beacon_crc_valid = false;
3313 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3314 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3315 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3316 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3317 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3319 if (req->flags & ASSOC_REQ_DISABLE_HT)
3320 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3322 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3323 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3324 sizeof(ifmgd->ht_capa_mask));
3326 if (req->ie && req->ie_len) {
3327 memcpy(assoc_data->ie, req->ie, req->ie_len);
3328 assoc_data->ie_len = req->ie_len;
3331 assoc_data->bss = req->bss;
3333 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3334 if (ifmgd->powersave)
3335 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3337 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3339 ifmgd->ap_smps = ifmgd->req_smps;
3342 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3343 * We still associate in non-HT mode (11a/b/g) if any one of these
3344 * ciphers is configured as pairwise.
3345 * We can set this to true for non-11n hardware, that'll be checked
3346 * separately along with the peer capabilities.
3348 assoc_data->capability = req->bss->capability;
3349 assoc_data->wmm_used = bss->wmm_used;
3350 assoc_data->supp_rates = bss->supp_rates;
3351 assoc_data->supp_rates_len = bss->supp_rates_len;
3352 assoc_data->ht_information_ie =
3353 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
3355 if (bss->wmm_used && bss->uapsd_supported &&
3356 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3357 assoc_data->uapsd_used = true;
3358 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3360 assoc_data->uapsd_used = false;
3361 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3364 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3365 assoc_data->ssid_len = ssidie[1];
3367 if (req->prev_bssid)
3368 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3371 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3372 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3374 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3375 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3378 if (req->crypto.control_port)
3379 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3381 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3383 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3384 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3386 /* kick off associate process */
3388 ifmgd->assoc_data = assoc_data;
3390 mutex_lock(&local->mtx);
3391 ieee80211_recalc_idle(sdata->local);
3392 mutex_unlock(&local->mtx);
3394 /* switch to the right channel */
3395 local->oper_channel = req->bss->channel;
3396 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3399 sta = sta_info_get(sdata, req->bss->bssid);
3404 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3405 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3407 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3413 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3415 err = sta_info_insert(sta);
3419 "%s: failed to insert STA entry for the AP (error %d)\n",
3424 WARN_ON_ONCE(memcmp(ifmgd->bssid, req->bss->bssid, ETH_ALEN));
3426 if (!bss->dtim_period &&
3427 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3429 * Wait up to one beacon interval ...
3430 * should this be more if we miss one?
3432 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3433 sdata->name, ifmgd->bssid);
3434 assoc_data->timeout = jiffies +
3435 TU_TO_EXP_TIME(req->bss->beacon_interval);
3437 assoc_data->have_beacon = true;
3438 assoc_data->sent_assoc = false;
3439 assoc_data->timeout = jiffies;
3441 run_again(ifmgd, assoc_data->timeout);
3446 ifmgd->assoc_data = NULL;
3450 mutex_unlock(&ifmgd->mtx);
3455 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
3456 struct cfg80211_deauth_request *req)
3458 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3459 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3461 mutex_lock(&ifmgd->mtx);
3463 if (ifmgd->auth_data) {
3464 ieee80211_destroy_auth_data(sdata, false);
3465 mutex_unlock(&ifmgd->mtx);
3470 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
3471 sdata->name, req->bssid, req->reason_code);
3473 if (ifmgd->associated &&
3474 memcmp(ifmgd->associated->bssid, req->bssid, ETH_ALEN) == 0)
3475 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3476 req->reason_code, true, frame_buf);
3478 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3479 IEEE80211_STYPE_DEAUTH,
3480 req->reason_code, true,
3482 mutex_unlock(&ifmgd->mtx);
3484 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3486 mutex_lock(&sdata->local->mtx);
3487 ieee80211_recalc_idle(sdata->local);
3488 mutex_unlock(&sdata->local->mtx);
3493 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
3494 struct cfg80211_disassoc_request *req)
3496 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3498 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3500 mutex_lock(&ifmgd->mtx);
3503 * cfg80211 should catch this ... but it's racy since
3504 * we can receive a disassoc frame, process it, hand it
3505 * to cfg80211 while that's in a locked section already
3506 * trying to tell us that the user wants to disconnect.
3508 if (ifmgd->associated != req->bss) {
3509 mutex_unlock(&ifmgd->mtx);
3513 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
3514 sdata->name, req->bss->bssid, req->reason_code);
3516 memcpy(bssid, req->bss->bssid, ETH_ALEN);
3517 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3518 req->reason_code, !req->local_state_change,
3520 mutex_unlock(&ifmgd->mtx);
3522 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3524 mutex_lock(&sdata->local->mtx);
3525 ieee80211_recalc_idle(sdata->local);
3526 mutex_unlock(&sdata->local->mtx);
3531 void ieee80211_mgd_teardown(struct ieee80211_sub_if_data *sdata)
3533 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3535 mutex_lock(&ifmgd->mtx);
3536 if (ifmgd->assoc_data)
3537 ieee80211_destroy_assoc_data(sdata, false);
3538 if (ifmgd->auth_data)
3539 ieee80211_destroy_auth_data(sdata, false);
3540 del_timer_sync(&ifmgd->timer);
3541 mutex_unlock(&ifmgd->mtx);
3544 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3545 enum nl80211_cqm_rssi_threshold_event rssi_event,
3548 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3550 trace_api_cqm_rssi_notify(sdata, rssi_event);
3552 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3554 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
3556 unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3558 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3559 return sdata->dev->operstate;
3561 EXPORT_SYMBOL(ieee80211_get_operstate);