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;
1282 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1283 u16 capab, bool erp_valid, u8 erp)
1285 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1287 bool use_protection;
1288 bool use_short_preamble;
1289 bool use_short_slot;
1292 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1293 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1295 use_protection = false;
1296 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1299 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1300 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1301 use_short_slot = true;
1303 if (use_protection != bss_conf->use_cts_prot) {
1304 bss_conf->use_cts_prot = use_protection;
1305 changed |= BSS_CHANGED_ERP_CTS_PROT;
1308 if (use_short_preamble != bss_conf->use_short_preamble) {
1309 bss_conf->use_short_preamble = use_short_preamble;
1310 changed |= BSS_CHANGED_ERP_PREAMBLE;
1313 if (use_short_slot != bss_conf->use_short_slot) {
1314 bss_conf->use_short_slot = use_short_slot;
1315 changed |= BSS_CHANGED_ERP_SLOT;
1321 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1322 struct cfg80211_bss *cbss,
1323 u32 bss_info_changed)
1325 struct ieee80211_bss *bss = (void *)cbss->priv;
1326 struct ieee80211_local *local = sdata->local;
1327 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1329 bss_info_changed |= BSS_CHANGED_ASSOC;
1330 /* set timing information */
1331 bss_conf->beacon_int = cbss->beacon_interval;
1332 bss_conf->timestamp = cbss->tsf;
1334 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1335 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1336 cbss->capability, bss->has_erp_value, bss->erp_value);
1338 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1339 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1341 sdata->u.mgd.associated = cbss;
1342 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1344 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1346 /* just to be sure */
1347 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1348 IEEE80211_STA_BEACON_POLL);
1350 ieee80211_led_assoc(local, 1);
1352 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1353 bss_conf->dtim_period = bss->dtim_period;
1355 bss_conf->dtim_period = 0;
1357 bss_conf->assoc = 1;
1359 * For now just always ask the driver to update the basic rateset
1360 * when we have associated, we aren't checking whether it actually
1363 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
1365 /* And the BSSID changed - we're associated now */
1366 bss_info_changed |= BSS_CHANGED_BSSID;
1368 /* Tell the driver to monitor connection quality (if supported) */
1369 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1370 bss_conf->cqm_rssi_thold)
1371 bss_info_changed |= BSS_CHANGED_CQM;
1373 /* Enable ARP filtering */
1374 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1375 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1376 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1379 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1381 mutex_lock(&local->iflist_mtx);
1382 ieee80211_recalc_ps(local, -1);
1383 ieee80211_recalc_smps(local);
1384 mutex_unlock(&local->iflist_mtx);
1386 netif_tx_start_all_queues(sdata->dev);
1387 netif_carrier_on(sdata->dev);
1390 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1391 u16 stype, u16 reason, bool tx,
1394 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1395 struct ieee80211_local *local = sdata->local;
1396 struct sta_info *sta;
1397 u32 changed = 0, config_changed = 0;
1400 ASSERT_MGD_MTX(ifmgd);
1402 if (WARN_ON_ONCE(tx && !frame_buf))
1405 if (WARN_ON(!ifmgd->associated))
1408 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1410 ifmgd->associated = NULL;
1411 memset(ifmgd->bssid, 0, ETH_ALEN);
1414 * we need to commit the associated = NULL change because the
1415 * scan code uses that to determine whether this iface should
1416 * go to/wake up from powersave or not -- and could otherwise
1417 * wake the queues erroneously.
1422 * Thus, we can only afterwards stop the queues -- to account
1423 * for the case where another CPU is finishing a scan at this
1424 * time -- we don't want the scan code to enable queues.
1427 netif_tx_stop_all_queues(sdata->dev);
1428 netif_carrier_off(sdata->dev);
1430 mutex_lock(&local->sta_mtx);
1431 sta = sta_info_get(sdata, bssid);
1433 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1434 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1436 mutex_unlock(&local->sta_mtx);
1438 /* deauthenticate/disassociate now */
1439 if (tx || frame_buf)
1440 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1443 /* flush out frame */
1445 drv_flush(local, false);
1447 /* remove AP and TDLS peers */
1448 sta_info_flush(local, sdata);
1450 /* finally reset all BSS / config parameters */
1451 changed |= ieee80211_reset_erp_info(sdata);
1453 ieee80211_led_assoc(local, 0);
1454 changed |= BSS_CHANGED_ASSOC;
1455 sdata->vif.bss_conf.assoc = false;
1457 /* channel(_type) changes are handled by ieee80211_hw_config */
1458 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1460 /* on the next assoc, re-program HT parameters */
1461 sdata->ht_opmode_valid = false;
1462 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1463 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1465 local->power_constr_level = 0;
1467 del_timer_sync(&local->dynamic_ps_timer);
1468 cancel_work_sync(&local->dynamic_ps_enable_work);
1470 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1471 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1472 config_changed |= IEEE80211_CONF_CHANGE_PS;
1474 local->ps_sdata = NULL;
1476 ieee80211_hw_config(local, config_changed);
1478 /* Disable ARP filtering */
1479 if (sdata->vif.bss_conf.arp_filter_enabled) {
1480 sdata->vif.bss_conf.arp_filter_enabled = false;
1481 changed |= BSS_CHANGED_ARP_FILTER;
1484 sdata->vif.bss_conf.qos = false;
1485 changed |= BSS_CHANGED_QOS;
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 /* disassociated - set to defaults now */
1492 ieee80211_set_wmm_default(sdata, false);
1494 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1495 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1496 del_timer_sync(&sdata->u.mgd.timer);
1497 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1500 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1501 struct ieee80211_hdr *hdr)
1504 * We can postpone the mgd.timer whenever receiving unicast frames
1505 * from AP because we know that the connection is working both ways
1506 * at that time. But multicast frames (and hence also beacons) must
1507 * be ignored here, because we need to trigger the timer during
1508 * data idle periods for sending the periodic probe request to the
1509 * AP we're connected to.
1511 if (is_multicast_ether_addr(hdr->addr1))
1514 ieee80211_sta_reset_conn_monitor(sdata);
1517 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1521 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1522 IEEE80211_STA_CONNECTION_POLL)))
1525 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1526 IEEE80211_STA_BEACON_POLL);
1527 mutex_lock(&sdata->local->iflist_mtx);
1528 ieee80211_recalc_ps(sdata->local, -1);
1529 mutex_unlock(&sdata->local->iflist_mtx);
1531 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1535 * We've received a probe response, but are not sure whether
1536 * we have or will be receiving any beacons or data, so let's
1537 * schedule the timers again, just in case.
1539 ieee80211_sta_reset_beacon_monitor(sdata);
1541 mod_timer(&ifmgd->conn_mon_timer,
1542 round_jiffies_up(jiffies +
1543 IEEE80211_CONNECTION_IDLE_TIME));
1546 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1547 struct ieee80211_hdr *hdr, bool ack)
1549 if (!ieee80211_is_data(hdr->frame_control))
1553 ieee80211_sta_reset_conn_monitor(sdata);
1555 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1556 sdata->u.mgd.probe_send_count > 0) {
1558 sdata->u.mgd.probe_send_count = 0;
1560 sdata->u.mgd.nullfunc_failed = true;
1561 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1565 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1567 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1569 u8 *dst = ifmgd->associated->bssid;
1570 u8 unicast_limit = max(1, max_probe_tries - 3);
1573 * Try sending broadcast probe requests for the last three
1574 * probe requests after the first ones failed since some
1575 * buggy APs only support broadcast probe requests.
1577 if (ifmgd->probe_send_count >= unicast_limit)
1581 * When the hardware reports an accurate Tx ACK status, it's
1582 * better to send a nullfunc frame instead of a probe request,
1583 * as it will kick us off the AP quickly if we aren't associated
1584 * anymore. The timeout will be reset if the frame is ACKed by
1587 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1588 ifmgd->nullfunc_failed = false;
1589 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1591 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1592 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
1593 (u32) -1, true, false);
1596 ifmgd->probe_send_count++;
1597 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1598 run_again(ifmgd, ifmgd->probe_timeout);
1601 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1604 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1605 bool already = false;
1607 if (!ieee80211_sdata_running(sdata))
1610 if (sdata->local->scanning)
1613 if (sdata->local->tmp_channel)
1616 mutex_lock(&ifmgd->mtx);
1618 if (!ifmgd->associated)
1621 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1622 if (beacon && net_ratelimit())
1623 printk(KERN_DEBUG "%s: detected beacon loss from AP "
1624 "- sending probe request\n", sdata->name);
1628 * The driver/our work has already reported this event or the
1629 * connection monitoring has kicked in and we have already sent
1630 * a probe request. Or maybe the AP died and the driver keeps
1631 * reporting until we disassociate...
1633 * In either case we have to ignore the current call to this
1634 * function (except for setting the correct probe reason bit)
1635 * because otherwise we would reset the timer every time and
1636 * never check whether we received a probe response!
1638 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1639 IEEE80211_STA_CONNECTION_POLL))
1643 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1645 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1650 mutex_lock(&sdata->local->iflist_mtx);
1651 ieee80211_recalc_ps(sdata->local, -1);
1652 mutex_unlock(&sdata->local->iflist_mtx);
1654 ifmgd->probe_send_count = 0;
1655 ieee80211_mgd_probe_ap_send(sdata);
1657 mutex_unlock(&ifmgd->mtx);
1660 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1661 struct ieee80211_vif *vif)
1663 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1664 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1665 struct sk_buff *skb;
1668 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1671 ASSERT_MGD_MTX(ifmgd);
1673 if (!ifmgd->associated)
1676 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1677 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1678 (u32) -1, ssid + 2, ssid[1],
1683 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1685 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1687 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1688 struct ieee80211_local *local = sdata->local;
1690 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1692 mutex_lock(&ifmgd->mtx);
1693 if (!ifmgd->associated) {
1694 mutex_unlock(&ifmgd->mtx);
1698 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1700 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1701 sdata->name, bssid);
1703 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1704 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1706 mutex_unlock(&ifmgd->mtx);
1709 * must be outside lock due to cfg80211,
1710 * but that's not a problem.
1712 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
1714 mutex_lock(&local->mtx);
1715 ieee80211_recalc_idle(local);
1716 mutex_unlock(&local->mtx);
1719 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1721 struct ieee80211_sub_if_data *sdata =
1722 container_of(work, struct ieee80211_sub_if_data,
1723 u.mgd.beacon_connection_loss_work);
1724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1725 struct sta_info *sta;
1727 if (ifmgd->associated) {
1729 sta = sta_info_get(sdata, ifmgd->bssid);
1731 sta->beacon_loss_count++;
1735 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1736 __ieee80211_connection_loss(sdata);
1738 ieee80211_mgd_probe_ap(sdata, true);
1741 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1743 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1744 struct ieee80211_hw *hw = &sdata->local->hw;
1746 trace_api_beacon_loss(sdata);
1748 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1749 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1751 EXPORT_SYMBOL(ieee80211_beacon_loss);
1753 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1755 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1756 struct ieee80211_hw *hw = &sdata->local->hw;
1758 trace_api_connection_loss(sdata);
1760 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1761 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1763 EXPORT_SYMBOL(ieee80211_connection_loss);
1766 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1769 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1771 lockdep_assert_held(&sdata->u.mgd.mtx);
1773 if (auth_data->synced)
1774 drv_finish_tx_sync(sdata->local, sdata,
1775 auth_data->bss->bssid,
1776 IEEE80211_TX_SYNC_AUTH);
1779 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1781 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1782 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1785 cfg80211_put_bss(auth_data->bss);
1787 sdata->u.mgd.auth_data = NULL;
1790 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1791 struct ieee80211_mgmt *mgmt, size_t len)
1793 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1795 struct ieee802_11_elems elems;
1797 pos = mgmt->u.auth.variable;
1798 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1799 if (!elems.challenge)
1801 auth_data->expected_transaction = 4;
1802 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1803 elems.challenge - 2, elems.challenge_len + 2,
1804 auth_data->bss->bssid, auth_data->bss->bssid,
1805 auth_data->key, auth_data->key_len,
1806 auth_data->key_idx);
1809 static enum rx_mgmt_action __must_check
1810 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1811 struct ieee80211_mgmt *mgmt, size_t len)
1813 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1815 u16 auth_alg, auth_transaction, status_code;
1816 struct sta_info *sta;
1818 lockdep_assert_held(&ifmgd->mtx);
1821 return RX_MGMT_NONE;
1823 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1824 return RX_MGMT_NONE;
1826 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1828 if (compare_ether_addr(bssid, mgmt->bssid))
1829 return RX_MGMT_NONE;
1831 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1832 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1833 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1835 if (auth_alg != ifmgd->auth_data->algorithm ||
1836 auth_transaction != ifmgd->auth_data->expected_transaction)
1837 return RX_MGMT_NONE;
1839 if (status_code != WLAN_STATUS_SUCCESS) {
1840 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1841 sdata->name, mgmt->sa, status_code);
1845 switch (ifmgd->auth_data->algorithm) {
1846 case WLAN_AUTH_OPEN:
1847 case WLAN_AUTH_LEAP:
1850 case WLAN_AUTH_SHARED_KEY:
1851 if (ifmgd->auth_data->expected_transaction != 4) {
1852 ieee80211_auth_challenge(sdata, mgmt, len);
1853 /* need another frame */
1854 return RX_MGMT_NONE;
1858 WARN_ONCE(1, "invalid auth alg %d",
1859 ifmgd->auth_data->algorithm);
1860 return RX_MGMT_NONE;
1863 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1865 if (ifmgd->auth_data->synced)
1866 drv_finish_tx_sync(sdata->local, sdata, bssid,
1867 IEEE80211_TX_SYNC_AUTH);
1868 ifmgd->auth_data->synced = false;
1869 ifmgd->auth_data->done = true;
1870 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1871 run_again(ifmgd, ifmgd->auth_data->timeout);
1873 /* move station state to auth */
1874 mutex_lock(&sdata->local->sta_mtx);
1875 sta = sta_info_get(sdata, bssid);
1877 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1880 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1881 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1882 sdata->name, bssid);
1885 mutex_unlock(&sdata->local->sta_mtx);
1887 return RX_MGMT_CFG80211_RX_AUTH;
1889 mutex_unlock(&sdata->local->sta_mtx);
1890 /* ignore frame -- wait for timeout */
1891 return RX_MGMT_NONE;
1895 static enum rx_mgmt_action __must_check
1896 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1897 struct ieee80211_mgmt *mgmt, size_t len)
1899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1900 const u8 *bssid = NULL;
1903 lockdep_assert_held(&ifmgd->mtx);
1906 return RX_MGMT_NONE;
1908 if (!ifmgd->associated ||
1909 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
1910 return RX_MGMT_NONE;
1912 bssid = ifmgd->associated->bssid;
1914 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1916 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1917 sdata->name, bssid, reason_code);
1919 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1921 mutex_lock(&sdata->local->mtx);
1922 ieee80211_recalc_idle(sdata->local);
1923 mutex_unlock(&sdata->local->mtx);
1925 return RX_MGMT_CFG80211_DEAUTH;
1929 static enum rx_mgmt_action __must_check
1930 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1931 struct ieee80211_mgmt *mgmt, size_t len)
1933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1936 lockdep_assert_held(&ifmgd->mtx);
1939 return RX_MGMT_NONE;
1941 if (!ifmgd->associated ||
1942 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
1943 return RX_MGMT_NONE;
1945 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1947 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1948 sdata->name, mgmt->sa, reason_code);
1950 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1952 mutex_lock(&sdata->local->mtx);
1953 ieee80211_recalc_idle(sdata->local);
1954 mutex_unlock(&sdata->local->mtx);
1956 return RX_MGMT_CFG80211_DISASSOC;
1959 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1960 u8 *supp_rates, unsigned int supp_rates_len,
1961 u32 *rates, u32 *basic_rates,
1962 bool *have_higher_than_11mbit,
1963 int *min_rate, int *min_rate_index)
1967 for (i = 0; i < supp_rates_len; i++) {
1968 int rate = (supp_rates[i] & 0x7f) * 5;
1969 bool is_basic = !!(supp_rates[i] & 0x80);
1972 *have_higher_than_11mbit = true;
1975 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1976 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1978 * Note: Even through the membership selector and the basic
1979 * rate flag share the same bit, they are not exactly
1982 if (!!(supp_rates[i] & 0x80) &&
1983 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1986 for (j = 0; j < sband->n_bitrates; j++) {
1987 if (sband->bitrates[j].bitrate == rate) {
1990 *basic_rates |= BIT(j);
1991 if (rate < *min_rate) {
1993 *min_rate_index = j;
2001 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2004 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2006 lockdep_assert_held(&sdata->u.mgd.mtx);
2008 if (assoc_data->synced)
2009 drv_finish_tx_sync(sdata->local, sdata,
2010 assoc_data->bss->bssid,
2011 IEEE80211_TX_SYNC_ASSOC);
2014 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2016 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2017 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2021 sdata->u.mgd.assoc_data = NULL;
2024 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2025 struct cfg80211_bss *cbss,
2026 struct ieee80211_mgmt *mgmt, size_t len)
2028 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2029 struct ieee80211_local *local = sdata->local;
2030 struct ieee80211_supported_band *sband;
2031 struct sta_info *sta;
2033 u32 rates, basic_rates;
2034 u16 capab_info, aid;
2035 struct ieee802_11_elems elems;
2036 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2039 bool have_higher_than_11mbit = false;
2040 u16 ap_ht_cap_flags;
2041 int min_rate = INT_MAX, min_rate_index = -1;
2043 /* AssocResp and ReassocResp have identical structure */
2045 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2046 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2048 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2050 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2052 aid &= ~(BIT(15) | BIT(14));
2054 ifmgd->broken_ap = false;
2056 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2058 "%s: invalid AID value %d (out of range), turn off PS\n",
2061 ifmgd->broken_ap = true;
2064 pos = mgmt->u.assoc_resp.variable;
2065 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2067 if (!elems.supp_rates) {
2068 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2075 mutex_lock(&sdata->local->sta_mtx);
2077 * station info was already allocated and inserted before
2078 * the association and should be available to us
2080 sta = sta_info_get(sdata, cbss->bssid);
2081 if (WARN_ON(!sta)) {
2082 mutex_unlock(&sdata->local->sta_mtx);
2088 sband = local->hw.wiphy->bands[local->oper_channel->band];
2090 ieee80211_get_rates(sband, elems.supp_rates, elems.supp_rates_len,
2091 &rates, &basic_rates, &have_higher_than_11mbit,
2092 &min_rate, &min_rate_index);
2094 ieee80211_get_rates(sband, elems.ext_supp_rates,
2095 elems.ext_supp_rates_len, &rates, &basic_rates,
2096 &have_higher_than_11mbit,
2097 &min_rate, &min_rate_index);
2100 * some buggy APs don't advertise basic_rates. use the lowest
2101 * supported rate instead.
2103 if (unlikely(!basic_rates) && min_rate_index >= 0) {
2104 printk(KERN_DEBUG "%s: No basic rates in AssocResp. "
2105 "Using min supported rate instead.\n", sdata->name);
2106 basic_rates = BIT(min_rate_index);
2109 sta->sta.supp_rates[local->oper_channel->band] = rates;
2110 sdata->vif.bss_conf.basic_rates = basic_rates;
2112 /* cf. IEEE 802.11 9.2.12 */
2113 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
2114 have_higher_than_11mbit)
2115 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2117 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2119 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2120 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2121 elems.ht_cap_elem, &sta->sta.ht_cap);
2123 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2125 rate_control_rate_init(sta);
2127 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2128 set_sta_flag(sta, WLAN_STA_MFP);
2130 if (elems.wmm_param)
2131 set_sta_flag(sta, WLAN_STA_WME);
2133 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2135 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2136 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2137 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2140 "%s: failed to move station %pM to desired state\n",
2141 sdata->name, sta->sta.addr);
2142 WARN_ON(__sta_info_destroy(sta));
2143 mutex_unlock(&sdata->local->sta_mtx);
2147 mutex_unlock(&sdata->local->sta_mtx);
2150 * Always handle WMM once after association regardless
2151 * of the first value the AP uses. Setting -1 here has
2152 * that effect because the AP values is an unsigned
2155 ifmgd->wmm_last_param_set = -1;
2157 if (elems.wmm_param)
2158 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2159 elems.wmm_param_len);
2161 ieee80211_set_wmm_default(sdata, false);
2162 changed |= BSS_CHANGED_QOS;
2164 if (elems.ht_info_elem && elems.wmm_param &&
2165 (sdata->local->hw.queues >= 4) &&
2166 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2167 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
2168 cbss->bssid, ap_ht_cap_flags,
2171 /* set AID and assoc capability,
2172 * ieee80211_set_associated() will tell the driver */
2173 bss_conf->aid = aid;
2174 bss_conf->assoc_capability = capab_info;
2175 ieee80211_set_associated(sdata, cbss, changed);
2178 * If we're using 4-addr mode, let the AP know that we're
2179 * doing so, so that it can create the STA VLAN on its side
2181 if (ifmgd->use_4addr)
2182 ieee80211_send_4addr_nullfunc(local, sdata);
2185 * Start timer to probe the connection to the AP now.
2186 * Also start the timer that will detect beacon loss.
2188 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2189 ieee80211_sta_reset_beacon_monitor(sdata);
2194 static enum rx_mgmt_action __must_check
2195 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2196 struct ieee80211_mgmt *mgmt, size_t len,
2197 struct cfg80211_bss **bss)
2199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2200 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2201 u16 capab_info, status_code, aid;
2202 struct ieee802_11_elems elems;
2206 lockdep_assert_held(&ifmgd->mtx);
2209 return RX_MGMT_NONE;
2210 if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
2211 return RX_MGMT_NONE;
2214 * AssocResp and ReassocResp have identical structure, so process both
2215 * of them in this function.
2219 return RX_MGMT_NONE;
2221 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2222 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2223 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2224 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2226 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2227 "status=%d aid=%d)\n",
2228 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2229 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2231 pos = mgmt->u.assoc_resp.variable;
2232 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2234 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2235 elems.timeout_int && elems.timeout_int_len == 5 &&
2236 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2238 tu = get_unaligned_le32(elems.timeout_int + 1);
2239 ms = tu * 1024 / 1000;
2240 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2241 "comeback duration %u TU (%u ms)\n",
2242 sdata->name, mgmt->sa, tu, ms);
2243 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2244 if (ms > IEEE80211_ASSOC_TIMEOUT)
2245 run_again(ifmgd, assoc_data->timeout);
2246 return RX_MGMT_NONE;
2249 *bss = assoc_data->bss;
2251 if (status_code != WLAN_STATUS_SUCCESS) {
2252 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2253 sdata->name, mgmt->sa, status_code);
2254 ieee80211_destroy_assoc_data(sdata, false);
2256 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2258 /* tell driver about sync done first */
2259 if (assoc_data->synced) {
2260 drv_finish_tx_sync(sdata->local, sdata,
2261 assoc_data->bss->bssid,
2262 IEEE80211_TX_SYNC_ASSOC);
2263 assoc_data->synced = false;
2266 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2267 /* oops -- internal error -- send timeout for now */
2268 ieee80211_destroy_assoc_data(sdata, true);
2269 sta_info_destroy_addr(sdata, mgmt->bssid);
2270 cfg80211_put_bss(*bss);
2271 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2275 * destroy assoc_data afterwards, as otherwise an idle
2276 * recalc after assoc_data is NULL but before associated
2277 * is set can cause the interface to go idle
2279 ieee80211_destroy_assoc_data(sdata, true);
2282 return RX_MGMT_CFG80211_RX_ASSOC;
2284 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2285 struct ieee80211_mgmt *mgmt,
2287 struct ieee80211_rx_status *rx_status,
2288 struct ieee802_11_elems *elems,
2291 struct ieee80211_local *local = sdata->local;
2293 struct ieee80211_bss *bss;
2294 struct ieee80211_channel *channel;
2295 bool need_ps = false;
2297 if (sdata->u.mgd.associated &&
2298 compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
2300 bss = (void *)sdata->u.mgd.associated->priv;
2301 /* not previously set so we may need to recalc */
2302 need_ps = !bss->dtim_period;
2305 if (elems->ds_params && elems->ds_params_len == 1)
2306 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2309 freq = rx_status->freq;
2311 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2313 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2316 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2319 ieee80211_rx_bss_put(local, bss);
2321 if (!sdata->u.mgd.associated)
2325 mutex_lock(&local->iflist_mtx);
2326 ieee80211_recalc_ps(local, -1);
2327 mutex_unlock(&local->iflist_mtx);
2330 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
2331 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
2333 struct ieee80211_channel_sw_ie *sw_elem =
2334 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
2335 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2336 bss, rx_status->mactime);
2341 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2342 struct sk_buff *skb)
2344 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2345 struct ieee80211_if_managed *ifmgd;
2346 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2347 size_t baselen, len = skb->len;
2348 struct ieee802_11_elems elems;
2350 ifmgd = &sdata->u.mgd;
2352 ASSERT_MGD_MTX(ifmgd);
2354 if (compare_ether_addr(mgmt->da, sdata->vif.addr))
2355 return; /* ignore ProbeResp to foreign address */
2357 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2361 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2364 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2366 if (ifmgd->associated &&
2367 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
2368 ieee80211_reset_ap_probe(sdata);
2370 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2371 compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
2373 /* got probe response, continue with auth */
2374 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2375 ifmgd->auth_data->tries = 0;
2376 ifmgd->auth_data->timeout = jiffies;
2377 run_again(ifmgd, ifmgd->auth_data->timeout);
2382 * This is the canonical list of information elements we care about,
2383 * the filter code also gives us all changes to the Microsoft OUI
2384 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2386 * We implement beacon filtering in software since that means we can
2387 * avoid processing the frame here and in cfg80211, and userspace
2388 * will not be able to tell whether the hardware supports it or not.
2390 * XXX: This list needs to be dynamic -- userspace needs to be able to
2391 * add items it requires. It also needs to be able to tell us to
2392 * look out for other vendor IEs.
2394 static const u64 care_about_ies =
2395 (1ULL << WLAN_EID_COUNTRY) |
2396 (1ULL << WLAN_EID_ERP_INFO) |
2397 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2398 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2399 (1ULL << WLAN_EID_HT_CAPABILITY) |
2400 (1ULL << WLAN_EID_HT_INFORMATION);
2402 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2403 struct ieee80211_mgmt *mgmt,
2405 struct ieee80211_rx_status *rx_status)
2407 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2408 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2410 struct ieee802_11_elems elems;
2411 struct ieee80211_local *local = sdata->local;
2413 bool erp_valid, directed_tim = false;
2418 lockdep_assert_held(&ifmgd->mtx);
2420 /* Process beacon from the current BSS */
2421 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2425 if (rx_status->freq != local->hw.conf.channel->center_freq)
2428 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2429 compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
2431 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2432 len - baselen, &elems);
2434 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2436 ifmgd->assoc_data->have_beacon = true;
2437 ifmgd->assoc_data->sent_assoc = false;
2438 /* continue assoc process */
2439 ifmgd->assoc_data->timeout = jiffies;
2440 run_again(ifmgd, ifmgd->assoc_data->timeout);
2444 if (!ifmgd->associated ||
2445 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
2447 bssid = ifmgd->associated->bssid;
2449 /* Track average RSSI from the Beacon frames of the current AP */
2450 ifmgd->last_beacon_signal = rx_status->signal;
2451 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2452 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2453 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2454 ifmgd->last_cqm_event_signal = 0;
2455 ifmgd->count_beacon_signal = 1;
2456 ifmgd->last_ave_beacon_signal = 0;
2458 ifmgd->ave_beacon_signal =
2459 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2460 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2461 ifmgd->ave_beacon_signal) / 16;
2462 ifmgd->count_beacon_signal++;
2465 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2466 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2467 int sig = ifmgd->ave_beacon_signal;
2468 int last_sig = ifmgd->last_ave_beacon_signal;
2471 * if signal crosses either of the boundaries, invoke callback
2472 * with appropriate parameters
2474 if (sig > ifmgd->rssi_max_thold &&
2475 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2476 ifmgd->last_ave_beacon_signal = sig;
2477 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2478 } else if (sig < ifmgd->rssi_min_thold &&
2479 (last_sig >= ifmgd->rssi_max_thold ||
2481 ifmgd->last_ave_beacon_signal = sig;
2482 drv_rssi_callback(local, RSSI_EVENT_LOW);
2486 if (bss_conf->cqm_rssi_thold &&
2487 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2488 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2489 int sig = ifmgd->ave_beacon_signal / 16;
2490 int last_event = ifmgd->last_cqm_event_signal;
2491 int thold = bss_conf->cqm_rssi_thold;
2492 int hyst = bss_conf->cqm_rssi_hyst;
2494 (last_event == 0 || sig < last_event - hyst)) {
2495 ifmgd->last_cqm_event_signal = sig;
2496 ieee80211_cqm_rssi_notify(
2498 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2500 } else if (sig > thold &&
2501 (last_event == 0 || sig > last_event + hyst)) {
2502 ifmgd->last_cqm_event_signal = sig;
2503 ieee80211_cqm_rssi_notify(
2505 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2510 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2511 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2512 if (net_ratelimit()) {
2513 printk(KERN_DEBUG "%s: cancelling probereq poll due "
2514 "to a received beacon\n", sdata->name);
2517 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2518 mutex_lock(&local->iflist_mtx);
2519 ieee80211_recalc_ps(local, -1);
2520 mutex_unlock(&local->iflist_mtx);
2524 * Push the beacon loss detection into the future since
2525 * we are processing a beacon from the AP just now.
2527 ieee80211_sta_reset_beacon_monitor(sdata);
2529 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2530 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2531 len - baselen, &elems,
2532 care_about_ies, ncrc);
2534 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2535 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2538 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
2539 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2542 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2543 elems.wmm_param_len);
2546 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2548 if (local->hw.conf.dynamic_ps_timeout > 0) {
2549 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2550 ieee80211_hw_config(local,
2551 IEEE80211_CONF_CHANGE_PS);
2552 ieee80211_send_nullfunc(local, sdata, 0);
2554 local->pspolling = true;
2557 * Here is assumed that the driver will be
2558 * able to send ps-poll frame and receive a
2559 * response even though power save mode is
2560 * enabled, but some drivers might require
2561 * to disable power save here. This needs
2562 * to be investigated.
2564 ieee80211_send_pspoll(local, sdata);
2569 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2571 ifmgd->beacon_crc = ncrc;
2572 ifmgd->beacon_crc_valid = true;
2574 if (elems.erp_info && elems.erp_info_len >= 1) {
2576 erp_value = elems.erp_info[0];
2580 changed |= ieee80211_handle_bss_capability(sdata,
2581 le16_to_cpu(mgmt->u.beacon.capab_info),
2582 erp_valid, erp_value);
2585 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2586 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
2587 struct sta_info *sta;
2588 struct ieee80211_supported_band *sband;
2589 u16 ap_ht_cap_flags;
2593 sta = sta_info_get(sdata, bssid);
2594 if (WARN_ON(!sta)) {
2599 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2601 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2602 elems.ht_cap_elem, &sta->sta.ht_cap);
2604 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2608 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
2609 bssid, ap_ht_cap_flags, true);
2612 /* Note: country IE parsing is done for us by cfg80211 */
2613 if (elems.country_elem) {
2614 /* TODO: IBSS also needs this */
2615 if (elems.pwr_constr_elem)
2616 ieee80211_handle_pwr_constr(sdata,
2617 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2618 elems.pwr_constr_elem,
2619 elems.pwr_constr_elem_len);
2622 ieee80211_bss_info_change_notify(sdata, changed);
2625 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2626 struct sk_buff *skb)
2628 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2629 struct ieee80211_rx_status *rx_status;
2630 struct ieee80211_mgmt *mgmt;
2631 struct cfg80211_bss *bss = NULL;
2632 enum rx_mgmt_action rma = RX_MGMT_NONE;
2635 rx_status = (struct ieee80211_rx_status *) skb->cb;
2636 mgmt = (struct ieee80211_mgmt *) skb->data;
2637 fc = le16_to_cpu(mgmt->frame_control);
2639 mutex_lock(&ifmgd->mtx);
2641 switch (fc & IEEE80211_FCTL_STYPE) {
2642 case IEEE80211_STYPE_BEACON:
2643 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2645 case IEEE80211_STYPE_PROBE_RESP:
2646 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2648 case IEEE80211_STYPE_AUTH:
2649 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2651 case IEEE80211_STYPE_DEAUTH:
2652 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2654 case IEEE80211_STYPE_DISASSOC:
2655 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2657 case IEEE80211_STYPE_ASSOC_RESP:
2658 case IEEE80211_STYPE_REASSOC_RESP:
2659 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2661 case IEEE80211_STYPE_ACTION:
2662 switch (mgmt->u.action.category) {
2663 case WLAN_CATEGORY_SPECTRUM_MGMT:
2664 ieee80211_sta_process_chanswitch(sdata,
2665 &mgmt->u.action.u.chan_switch.sw_elem,
2666 (void *)ifmgd->associated->priv,
2667 rx_status->mactime);
2671 mutex_unlock(&ifmgd->mtx);
2677 case RX_MGMT_CFG80211_DEAUTH:
2678 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2680 case RX_MGMT_CFG80211_DISASSOC:
2681 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2683 case RX_MGMT_CFG80211_RX_AUTH:
2684 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2686 case RX_MGMT_CFG80211_RX_ASSOC:
2687 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2689 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2690 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2693 WARN(1, "unexpected: %d", rma);
2697 static void ieee80211_sta_timer(unsigned long data)
2699 struct ieee80211_sub_if_data *sdata =
2700 (struct ieee80211_sub_if_data *) data;
2701 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2702 struct ieee80211_local *local = sdata->local;
2704 if (local->quiescing) {
2705 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2709 ieee80211_queue_work(&local->hw, &sdata->work);
2712 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2713 u8 *bssid, u8 reason)
2715 struct ieee80211_local *local = sdata->local;
2716 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2717 u8 frame_buf[DEAUTH_DISASSOC_LEN];
2719 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2720 IEEE80211_STA_BEACON_POLL);
2722 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2724 mutex_unlock(&ifmgd->mtx);
2727 * must be outside lock due to cfg80211,
2728 * but that's not a problem.
2730 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
2732 mutex_lock(&local->mtx);
2733 ieee80211_recalc_idle(local);
2734 mutex_unlock(&local->mtx);
2736 mutex_lock(&ifmgd->mtx);
2739 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2741 struct ieee80211_local *local = sdata->local;
2742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2743 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2745 lockdep_assert_held(&ifmgd->mtx);
2747 if (WARN_ON_ONCE(!auth_data))
2750 if (!auth_data->synced) {
2751 int ret = drv_tx_sync(local, sdata, auth_data->bss->bssid,
2752 IEEE80211_TX_SYNC_AUTH);
2756 auth_data->synced = true;
2760 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2761 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2762 sdata->name, auth_data->bss->bssid);
2765 * Most likely AP is not in the range so remove the
2766 * bss struct for that AP.
2768 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2773 if (auth_data->bss->proberesp_ies) {
2774 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2775 sdata->name, auth_data->bss->bssid, auth_data->tries,
2776 IEEE80211_AUTH_MAX_TRIES);
2778 auth_data->expected_transaction = 2;
2779 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2780 auth_data->ie, auth_data->ie_len,
2781 auth_data->bss->bssid,
2782 auth_data->bss->bssid, NULL, 0, 0);
2786 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2787 sdata->name, auth_data->bss->bssid, auth_data->tries,
2788 IEEE80211_AUTH_MAX_TRIES);
2790 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2794 * Direct probe is sent to broadcast address as some APs
2795 * will not answer to direct packet in unassociated state.
2797 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2798 NULL, 0, (u32) -1, true, false);
2801 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2802 run_again(ifmgd, auth_data->timeout);
2807 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2809 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2810 struct ieee80211_local *local = sdata->local;
2812 lockdep_assert_held(&sdata->u.mgd.mtx);
2814 if (!assoc_data->synced) {
2815 int ret = drv_tx_sync(local, sdata, assoc_data->bss->bssid,
2816 IEEE80211_TX_SYNC_ASSOC);
2820 assoc_data->synced = true;
2822 assoc_data->tries++;
2823 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2824 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2825 sdata->name, assoc_data->bss->bssid);
2828 * Most likely AP is not in the range so remove the
2829 * bss struct for that AP.
2831 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2836 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2837 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2838 IEEE80211_ASSOC_MAX_TRIES);
2839 ieee80211_send_assoc(sdata);
2841 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2842 run_again(&sdata->u.mgd, assoc_data->timeout);
2847 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2849 struct ieee80211_local *local = sdata->local;
2850 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2852 mutex_lock(&ifmgd->mtx);
2854 if (ifmgd->auth_data &&
2855 time_after(jiffies, ifmgd->auth_data->timeout)) {
2856 if (ifmgd->auth_data->done) {
2858 * ok ... we waited for assoc but userspace didn't,
2859 * so let's just kill the auth data
2861 ieee80211_destroy_auth_data(sdata, false);
2862 } else if (ieee80211_probe_auth(sdata)) {
2865 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2867 ieee80211_destroy_auth_data(sdata, false);
2869 mutex_unlock(&ifmgd->mtx);
2870 cfg80211_send_auth_timeout(sdata->dev, bssid);
2871 mutex_lock(&ifmgd->mtx);
2873 } else if (ifmgd->auth_data)
2874 run_again(ifmgd, ifmgd->auth_data->timeout);
2876 if (ifmgd->assoc_data &&
2877 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2878 if (!ifmgd->assoc_data->have_beacon ||
2879 ieee80211_do_assoc(sdata)) {
2882 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2884 ieee80211_destroy_assoc_data(sdata, false);
2886 mutex_unlock(&ifmgd->mtx);
2887 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2888 mutex_lock(&ifmgd->mtx);
2890 } else if (ifmgd->assoc_data)
2891 run_again(ifmgd, ifmgd->assoc_data->timeout);
2893 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2894 IEEE80211_STA_CONNECTION_POLL) &&
2895 ifmgd->associated) {
2899 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2901 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2902 max_tries = max_nullfunc_tries;
2904 max_tries = max_probe_tries;
2906 /* ACK received for nullfunc probing frame */
2907 if (!ifmgd->probe_send_count)
2908 ieee80211_reset_ap_probe(sdata);
2909 else if (ifmgd->nullfunc_failed) {
2910 if (ifmgd->probe_send_count < max_tries) {
2911 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2912 wiphy_debug(local->hw.wiphy,
2913 "%s: No ack for nullfunc frame to"
2914 " AP %pM, try %d/%i\n",
2916 ifmgd->probe_send_count, max_tries);
2918 ieee80211_mgd_probe_ap_send(sdata);
2920 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2921 wiphy_debug(local->hw.wiphy,
2922 "%s: No ack for nullfunc frame to"
2923 " AP %pM, disconnecting.\n",
2924 sdata->name, bssid);
2926 ieee80211_sta_connection_lost(sdata, bssid,
2927 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2929 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2930 run_again(ifmgd, ifmgd->probe_timeout);
2931 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2932 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2933 wiphy_debug(local->hw.wiphy,
2934 "%s: Failed to send nullfunc to AP %pM"
2935 " after %dms, disconnecting.\n",
2937 bssid, probe_wait_ms);
2939 ieee80211_sta_connection_lost(sdata, bssid,
2940 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2941 } else if (ifmgd->probe_send_count < max_tries) {
2942 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2943 wiphy_debug(local->hw.wiphy,
2944 "%s: No probe response from AP %pM"
2945 " after %dms, try %d/%i\n",
2947 bssid, probe_wait_ms,
2948 ifmgd->probe_send_count, max_tries);
2950 ieee80211_mgd_probe_ap_send(sdata);
2953 * We actually lost the connection ... or did we?
2956 wiphy_debug(local->hw.wiphy,
2957 "%s: No probe response from AP %pM"
2958 " after %dms, disconnecting.\n",
2960 bssid, probe_wait_ms);
2962 ieee80211_sta_connection_lost(sdata, bssid,
2963 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2967 mutex_unlock(&ifmgd->mtx);
2969 mutex_lock(&local->mtx);
2970 ieee80211_recalc_idle(local);
2971 mutex_unlock(&local->mtx);
2974 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2976 struct ieee80211_sub_if_data *sdata =
2977 (struct ieee80211_sub_if_data *) data;
2978 struct ieee80211_local *local = sdata->local;
2980 if (local->quiescing)
2983 ieee80211_queue_work(&sdata->local->hw,
2984 &sdata->u.mgd.beacon_connection_loss_work);
2987 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2989 struct ieee80211_sub_if_data *sdata =
2990 (struct ieee80211_sub_if_data *) data;
2991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2992 struct ieee80211_local *local = sdata->local;
2994 if (local->quiescing)
2997 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3000 static void ieee80211_sta_monitor_work(struct work_struct *work)
3002 struct ieee80211_sub_if_data *sdata =
3003 container_of(work, struct ieee80211_sub_if_data,
3004 u.mgd.monitor_work);
3006 ieee80211_mgd_probe_ap(sdata, false);
3009 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3013 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3014 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
3015 IEEE80211_STA_CONNECTION_POLL);
3017 /* let's probe the connection once */
3018 flags = sdata->local->hw.flags;
3019 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3020 ieee80211_queue_work(&sdata->local->hw,
3021 &sdata->u.mgd.monitor_work);
3022 /* and do all the other regular work too */
3023 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3028 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3030 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3033 * we need to use atomic bitops for the running bits
3034 * only because both timers might fire at the same
3035 * time -- the code here is properly synchronised.
3038 cancel_work_sync(&ifmgd->request_smps_work);
3040 cancel_work_sync(&ifmgd->monitor_work);
3041 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
3042 if (del_timer_sync(&ifmgd->timer))
3043 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3045 cancel_work_sync(&ifmgd->chswitch_work);
3046 if (del_timer_sync(&ifmgd->chswitch_timer))
3047 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
3049 /* these will just be re-established on connection */
3050 del_timer_sync(&ifmgd->conn_mon_timer);
3051 del_timer_sync(&ifmgd->bcn_mon_timer);
3054 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3058 if (!ifmgd->associated)
3061 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3062 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3063 mutex_lock(&ifmgd->mtx);
3064 if (ifmgd->associated) {
3065 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
3066 wiphy_debug(sdata->local->hw.wiphy,
3067 "%s: driver requested disconnect after resume.\n",
3070 ieee80211_sta_connection_lost(sdata,
3071 ifmgd->associated->bssid,
3072 WLAN_REASON_UNSPECIFIED);
3073 mutex_unlock(&ifmgd->mtx);
3076 mutex_unlock(&ifmgd->mtx);
3079 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3080 add_timer(&ifmgd->timer);
3081 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3082 add_timer(&ifmgd->chswitch_timer);
3083 ieee80211_sta_reset_beacon_monitor(sdata);
3084 ieee80211_restart_sta_timer(sdata);
3088 /* interface setup */
3089 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3091 struct ieee80211_if_managed *ifmgd;
3093 ifmgd = &sdata->u.mgd;
3094 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3095 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3096 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3097 ieee80211_beacon_connection_loss_work);
3098 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3099 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3100 (unsigned long) sdata);
3101 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3102 (unsigned long) sdata);
3103 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3104 (unsigned long) sdata);
3105 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3106 (unsigned long) sdata);
3109 ifmgd->powersave = sdata->wdev.ps;
3111 mutex_init(&ifmgd->mtx);
3113 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3114 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3116 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3119 /* scan finished notification */
3120 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3122 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
3124 /* Restart STA timers */
3126 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3127 ieee80211_restart_sta_timer(sdata);
3131 int ieee80211_max_network_latency(struct notifier_block *nb,
3132 unsigned long data, void *dummy)
3134 s32 latency_usec = (s32) data;
3135 struct ieee80211_local *local =
3136 container_of(nb, struct ieee80211_local,
3137 network_latency_notifier);
3139 mutex_lock(&local->iflist_mtx);
3140 ieee80211_recalc_ps(local, latency_usec);
3141 mutex_unlock(&local->iflist_mtx);
3147 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3148 struct cfg80211_auth_request *req)
3150 struct ieee80211_local *local = sdata->local;
3151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3152 struct ieee80211_mgd_auth_data *auth_data;
3153 struct sta_info *sta;
3157 /* prepare auth data structure */
3159 switch (req->auth_type) {
3160 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3161 auth_alg = WLAN_AUTH_OPEN;
3163 case NL80211_AUTHTYPE_SHARED_KEY:
3164 if (IS_ERR(local->wep_tx_tfm))
3166 auth_alg = WLAN_AUTH_SHARED_KEY;
3168 case NL80211_AUTHTYPE_FT:
3169 auth_alg = WLAN_AUTH_FT;
3171 case NL80211_AUTHTYPE_NETWORK_EAP:
3172 auth_alg = WLAN_AUTH_LEAP;
3178 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3182 auth_data->bss = req->bss;
3184 if (req->ie && req->ie_len) {
3185 memcpy(auth_data->ie, req->ie, req->ie_len);
3186 auth_data->ie_len = req->ie_len;
3189 if (req->key && req->key_len) {
3190 auth_data->key_len = req->key_len;
3191 auth_data->key_idx = req->key_idx;
3192 memcpy(auth_data->key, req->key, req->key_len);
3195 auth_data->algorithm = auth_alg;
3197 /* try to authenticate/probe */
3199 mutex_lock(&ifmgd->mtx);
3201 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3202 ifmgd->assoc_data) {
3207 if (ifmgd->auth_data)
3208 ieee80211_destroy_auth_data(sdata, false);
3210 /* prep auth_data so we don't go into idle on disassoc */
3211 ifmgd->auth_data = auth_data;
3213 if (ifmgd->associated)
3214 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3216 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3217 sdata->name, req->bss->bssid);
3219 mutex_lock(&local->mtx);
3220 ieee80211_recalc_idle(sdata->local);
3221 mutex_unlock(&local->mtx);
3223 /* switch to the right channel */
3224 local->oper_channel = req->bss->channel;
3225 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3228 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3229 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3231 /* add station entry */
3232 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3238 err = sta_info_insert(sta);
3241 "%s: failed to insert STA entry for the AP %pM (error %d)\n",
3242 sdata->name, req->bss->bssid, err);
3246 err = ieee80211_probe_auth(sdata);
3248 if (auth_data->synced)
3249 drv_finish_tx_sync(local, sdata, req->bss->bssid,
3250 IEEE80211_TX_SYNC_AUTH);
3251 sta_info_destroy_addr(sdata, req->bss->bssid);
3255 /* hold our own reference */
3256 cfg80211_ref_bss(auth_data->bss);
3261 ifmgd->auth_data = NULL;
3265 mutex_unlock(&ifmgd->mtx);
3270 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3271 struct cfg80211_assoc_request *req)
3273 struct ieee80211_local *local = sdata->local;
3274 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3275 struct ieee80211_bss *bss = (void *)req->bss->priv;
3276 struct ieee80211_mgd_assoc_data *assoc_data;
3277 struct sta_info *sta;
3281 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3285 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3289 mutex_lock(&ifmgd->mtx);
3291 if (ifmgd->associated)
3292 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3294 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3299 if (ifmgd->assoc_data) {
3304 if (ifmgd->auth_data) {
3307 /* keep sta info, bssid if matching */
3308 match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
3309 ieee80211_destroy_auth_data(sdata, match);
3312 /* prepare assoc data */
3314 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
3315 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
3317 ifmgd->beacon_crc_valid = false;
3319 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3320 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3321 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3322 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3323 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3325 if (req->flags & ASSOC_REQ_DISABLE_HT)
3326 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3328 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3329 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3330 sizeof(ifmgd->ht_capa_mask));
3332 if (req->ie && req->ie_len) {
3333 memcpy(assoc_data->ie, req->ie, req->ie_len);
3334 assoc_data->ie_len = req->ie_len;
3337 assoc_data->bss = req->bss;
3339 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3340 if (ifmgd->powersave)
3341 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3343 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3345 ifmgd->ap_smps = ifmgd->req_smps;
3348 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3349 * We still associate in non-HT mode (11a/b/g) if any one of these
3350 * ciphers is configured as pairwise.
3351 * We can set this to true for non-11n hardware, that'll be checked
3352 * separately along with the peer capabilities.
3354 assoc_data->capability = req->bss->capability;
3355 assoc_data->wmm_used = bss->wmm_used;
3356 assoc_data->supp_rates = bss->supp_rates;
3357 assoc_data->supp_rates_len = bss->supp_rates_len;
3358 assoc_data->ht_information_ie =
3359 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
3361 if (bss->wmm_used && bss->uapsd_supported &&
3362 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3363 assoc_data->uapsd_used = true;
3364 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3366 assoc_data->uapsd_used = false;
3367 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3370 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3371 assoc_data->ssid_len = ssidie[1];
3373 if (req->prev_bssid)
3374 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3377 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3378 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3380 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3381 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3384 if (req->crypto.control_port)
3385 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3387 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3389 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3390 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3392 /* kick off associate process */
3394 ifmgd->assoc_data = assoc_data;
3396 mutex_lock(&local->mtx);
3397 ieee80211_recalc_idle(sdata->local);
3398 mutex_unlock(&local->mtx);
3400 /* switch to the right channel */
3401 local->oper_channel = req->bss->channel;
3402 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3405 sta = sta_info_get(sdata, req->bss->bssid);
3410 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3411 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3413 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3419 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3421 err = sta_info_insert(sta);
3425 "%s: failed to insert STA entry for the AP (error %d)\n",
3430 WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, req->bss->bssid));
3432 if (!bss->dtim_period &&
3433 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3435 * Wait up to one beacon interval ...
3436 * should this be more if we miss one?
3438 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3439 sdata->name, ifmgd->bssid);
3440 assoc_data->timeout = jiffies +
3441 TU_TO_EXP_TIME(req->bss->beacon_interval);
3443 assoc_data->have_beacon = true;
3444 assoc_data->sent_assoc = false;
3445 assoc_data->timeout = jiffies;
3447 run_again(ifmgd, assoc_data->timeout);
3449 if (bss->corrupt_data) {
3450 char *corrupt_type = "data";
3451 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3452 if (bss->corrupt_data &
3453 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3454 corrupt_type = "beacon and probe response";
3456 corrupt_type = "beacon";
3457 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3458 corrupt_type = "probe response";
3459 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3460 sdata->name, corrupt_type);
3466 ifmgd->assoc_data = NULL;
3470 mutex_unlock(&ifmgd->mtx);
3475 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
3476 struct cfg80211_deauth_request *req)
3478 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3479 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3481 mutex_lock(&ifmgd->mtx);
3483 if (ifmgd->auth_data) {
3484 ieee80211_destroy_auth_data(sdata, false);
3485 mutex_unlock(&ifmgd->mtx);
3490 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
3491 sdata->name, req->bssid, req->reason_code);
3493 if (ifmgd->associated &&
3494 compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
3495 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3496 req->reason_code, true, frame_buf);
3498 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3499 IEEE80211_STYPE_DEAUTH,
3500 req->reason_code, true,
3502 mutex_unlock(&ifmgd->mtx);
3504 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3506 mutex_lock(&sdata->local->mtx);
3507 ieee80211_recalc_idle(sdata->local);
3508 mutex_unlock(&sdata->local->mtx);
3513 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
3514 struct cfg80211_disassoc_request *req)
3516 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3518 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3520 mutex_lock(&ifmgd->mtx);
3523 * cfg80211 should catch this ... but it's racy since
3524 * we can receive a disassoc frame, process it, hand it
3525 * to cfg80211 while that's in a locked section already
3526 * trying to tell us that the user wants to disconnect.
3528 if (ifmgd->associated != req->bss) {
3529 mutex_unlock(&ifmgd->mtx);
3533 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
3534 sdata->name, req->bss->bssid, req->reason_code);
3536 memcpy(bssid, req->bss->bssid, ETH_ALEN);
3537 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3538 req->reason_code, !req->local_state_change,
3540 mutex_unlock(&ifmgd->mtx);
3542 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3544 mutex_lock(&sdata->local->mtx);
3545 ieee80211_recalc_idle(sdata->local);
3546 mutex_unlock(&sdata->local->mtx);
3551 void ieee80211_mgd_teardown(struct ieee80211_sub_if_data *sdata)
3553 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3555 mutex_lock(&ifmgd->mtx);
3556 if (ifmgd->assoc_data)
3557 ieee80211_destroy_assoc_data(sdata, false);
3558 if (ifmgd->auth_data)
3559 ieee80211_destroy_auth_data(sdata, false);
3560 del_timer_sync(&ifmgd->timer);
3561 mutex_unlock(&ifmgd->mtx);
3564 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3565 enum nl80211_cqm_rssi_threshold_event rssi_event,
3568 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3570 trace_api_cqm_rssi_notify(sdata, rssi_event);
3572 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3574 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
3576 unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3578 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3579 return sdata->dev->operstate;
3581 EXPORT_SYMBOL(ieee80211_get_operstate);