2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_MAX_TRIES 3
35 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37 #define IEEE80211_ASSOC_MAX_TRIES 3
39 static int max_nullfunc_tries = 2;
40 module_param(max_nullfunc_tries, int, 0644);
41 MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
44 static int max_probe_tries = 5;
45 module_param(max_probe_tries, int, 0644);
46 MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
57 #define IEEE80211_BEACON_LOSS_COUNT 7
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
63 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
69 static int probe_wait_ms = 500;
70 module_param(probe_wait_ms, int, 0644);
71 MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
80 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
86 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88 #define TMR_RUNNING_TIMER 0
89 #define TMR_RUNNING_CHANSW 1
91 #define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
100 /* no action required */
103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
120 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
122 lockdep_assert_held(&ifmgd->mtx);
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
135 static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
137 ASSERT_MGD_MTX(ifmgd);
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
144 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
149 mod_timer(&sdata->u.mgd.bcn_mon_timer,
150 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
153 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157 if (unlikely(!sdata->u.mgd.associated))
160 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
163 mod_timer(&sdata->u.mgd.conn_mon_timer,
164 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
166 ifmgd->probe_send_count = 0;
169 static int ecw2cw(int ecw)
171 return (1 << ecw) - 1;
174 static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
175 struct ieee80211_ht_operation *ht_oper,
176 const u8 *bssid, bool reconfig)
178 struct ieee80211_local *local = sdata->local;
179 struct ieee80211_supported_band *sband;
180 struct sta_info *sta;
183 bool disable_40 = false;
185 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
187 switch (sdata->vif.bss_conf.channel_type) {
188 case NL80211_CHAN_HT40PLUS:
189 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
192 case NL80211_CHAN_HT40MINUS:
193 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
204 mutex_lock(&local->sta_mtx);
205 sta = sta_info_get(sdata, bssid);
209 if (sta && !sta->supports_40mhz)
212 if (sta && (!reconfig ||
213 (disable_40 != !(sta->sta.ht_cap.cap &
214 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
217 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
219 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
221 rate_control_rate_update(local, sband, sta,
222 IEEE80211_RC_BW_CHANGED);
224 mutex_unlock(&local->sta_mtx);
226 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
228 /* if bss configuration changed store the new one */
229 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
230 changed |= BSS_CHANGED_HT;
231 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
237 /* frame sending functions */
239 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
240 struct ieee80211_supported_band *sband,
246 for (i = 0; i < supp_rates_len; i++) {
247 int rate = (supp_rates[i] & 0x7F) * 5;
249 for (j = 0; j < sband->n_bitrates; j++)
250 if (sband->bitrates[j].bitrate == rate) {
260 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
261 struct sk_buff *skb, const u8 *ht_oper_ie,
262 struct ieee80211_supported_band *sband,
263 struct ieee80211_channel *channel,
264 enum ieee80211_smps_mode smps)
266 struct ieee80211_ht_operation *ht_oper;
268 u32 flags = channel->flags;
270 struct ieee80211_sta_ht_cap ht_cap;
272 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
277 if (ht_oper_ie[1] < sizeof(struct ieee80211_ht_operation))
280 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
281 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
283 ht_oper = (struct ieee80211_ht_operation *)(ht_oper_ie + 2);
285 /* determine capability flags */
288 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
289 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
290 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
291 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
292 cap &= ~IEEE80211_HT_CAP_SGI_40;
295 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
296 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
297 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
298 cap &= ~IEEE80211_HT_CAP_SGI_40;
304 * If 40 MHz was disabled associate as though we weren't
305 * capable of 40 MHz -- some broken APs will never fall
306 * back to trying to transmit in 20 MHz.
308 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
309 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
310 cap &= ~IEEE80211_HT_CAP_SGI_40;
313 /* set SM PS mode properly */
314 cap &= ~IEEE80211_HT_CAP_SM_PS;
316 case IEEE80211_SMPS_AUTOMATIC:
317 case IEEE80211_SMPS_NUM_MODES:
319 case IEEE80211_SMPS_OFF:
320 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
321 IEEE80211_HT_CAP_SM_PS_SHIFT;
323 case IEEE80211_SMPS_STATIC:
324 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
325 IEEE80211_HT_CAP_SM_PS_SHIFT;
327 case IEEE80211_SMPS_DYNAMIC:
328 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
329 IEEE80211_HT_CAP_SM_PS_SHIFT;
333 /* reserve and fill IE */
334 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
335 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
338 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
340 struct ieee80211_local *local = sdata->local;
341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
342 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
344 struct ieee80211_mgmt *mgmt;
346 size_t offset = 0, noffset;
347 int i, count, rates_len, supp_rates_len;
349 struct ieee80211_supported_band *sband;
352 lockdep_assert_held(&ifmgd->mtx);
354 sband = local->hw.wiphy->bands[local->oper_channel->band];
356 if (assoc_data->supp_rates_len) {
358 * Get all rates supported by the device and the AP as
359 * some APs don't like getting a superset of their rates
360 * in the association request (e.g. D-Link DAP 1353 in
363 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
364 assoc_data->supp_rates_len,
368 * In case AP not provide any supported rates information
369 * before association, we send information element(s) with
370 * all rates that we support.
373 rates_len = sband->n_bitrates;
376 skb = alloc_skb(local->hw.extra_tx_headroom +
377 sizeof(*mgmt) + /* bit too much but doesn't matter */
378 2 + assoc_data->ssid_len + /* SSID */
379 4 + rates_len + /* (extended) rates */
380 4 + /* power capability */
381 2 + 2 * sband->n_channels + /* supported channels */
382 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
383 assoc_data->ie_len + /* extra IEs */
389 skb_reserve(skb, local->hw.extra_tx_headroom);
391 capab = WLAN_CAPABILITY_ESS;
393 if (sband->band == IEEE80211_BAND_2GHZ) {
394 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
395 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
396 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
397 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
400 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
401 capab |= WLAN_CAPABILITY_PRIVACY;
403 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
404 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
405 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
407 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
409 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
410 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
411 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
413 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
415 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
416 IEEE80211_STYPE_REASSOC_REQ);
417 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
418 mgmt->u.reassoc_req.listen_interval =
419 cpu_to_le16(local->hw.conf.listen_interval);
420 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
424 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
425 IEEE80211_STYPE_ASSOC_REQ);
426 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
427 mgmt->u.assoc_req.listen_interval =
428 cpu_to_le16(local->hw.conf.listen_interval);
432 pos = skb_put(skb, 2 + assoc_data->ssid_len);
433 *pos++ = WLAN_EID_SSID;
434 *pos++ = assoc_data->ssid_len;
435 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
437 /* add all rates which were marked to be used above */
438 supp_rates_len = rates_len;
439 if (supp_rates_len > 8)
442 pos = skb_put(skb, supp_rates_len + 2);
443 *pos++ = WLAN_EID_SUPP_RATES;
444 *pos++ = supp_rates_len;
447 for (i = 0; i < sband->n_bitrates; i++) {
448 if (BIT(i) & rates) {
449 int rate = sband->bitrates[i].bitrate;
450 *pos++ = (u8) (rate / 5);
456 if (rates_len > count) {
457 pos = skb_put(skb, rates_len - count + 2);
458 *pos++ = WLAN_EID_EXT_SUPP_RATES;
459 *pos++ = rates_len - count;
461 for (i++; i < sband->n_bitrates; i++) {
462 if (BIT(i) & rates) {
463 int rate = sband->bitrates[i].bitrate;
464 *pos++ = (u8) (rate / 5);
469 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
470 /* 1. power capabilities */
471 pos = skb_put(skb, 4);
472 *pos++ = WLAN_EID_PWR_CAPABILITY;
474 *pos++ = 0; /* min tx power */
475 *pos++ = local->oper_channel->max_power; /* max tx power */
477 /* 2. supported channels */
478 /* TODO: get this in reg domain format */
479 pos = skb_put(skb, 2 * sband->n_channels + 2);
480 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
481 *pos++ = 2 * sband->n_channels;
482 for (i = 0; i < sband->n_channels; i++) {
483 *pos++ = ieee80211_frequency_to_channel(
484 sband->channels[i].center_freq);
485 *pos++ = 1; /* one channel in the subband*/
489 /* if present, add any custom IEs that go before HT */
490 if (assoc_data->ie_len && assoc_data->ie) {
491 static const u8 before_ht[] = {
494 WLAN_EID_EXT_SUPP_RATES,
495 WLAN_EID_PWR_CAPABILITY,
496 WLAN_EID_SUPPORTED_CHANNELS,
499 WLAN_EID_RRM_ENABLED_CAPABILITIES,
500 WLAN_EID_MOBILITY_DOMAIN,
501 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
503 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
504 before_ht, ARRAY_SIZE(before_ht),
506 pos = skb_put(skb, noffset - offset);
507 memcpy(pos, assoc_data->ie + offset, noffset - offset);
511 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
512 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_operation_ie,
513 sband, local->oper_channel, ifmgd->ap_smps);
515 /* if present, add any custom non-vendor IEs that go after HT */
516 if (assoc_data->ie_len && assoc_data->ie) {
517 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
520 pos = skb_put(skb, noffset - offset);
521 memcpy(pos, assoc_data->ie + offset, noffset - offset);
525 if (assoc_data->wmm) {
526 if (assoc_data->uapsd) {
527 qos_info = ifmgd->uapsd_queues;
528 qos_info |= (ifmgd->uapsd_max_sp_len <<
529 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
534 pos = skb_put(skb, 9);
535 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
536 *pos++ = 7; /* len */
537 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
540 *pos++ = 2; /* WME */
541 *pos++ = 0; /* WME info */
542 *pos++ = 1; /* WME ver */
546 /* add any remaining custom (i.e. vendor specific here) IEs */
547 if (assoc_data->ie_len && assoc_data->ie) {
548 noffset = assoc_data->ie_len;
549 pos = skb_put(skb, noffset - offset);
550 memcpy(pos, assoc_data->ie + offset, noffset - offset);
553 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
554 ieee80211_tx_skb(sdata, skb);
557 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
558 const u8 *bssid, u16 stype,
559 u16 reason, bool send_frame,
562 struct ieee80211_local *local = sdata->local;
563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
565 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
568 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
569 mgmt->duration = 0; /* initialize only */
570 mgmt->seq_ctrl = 0; /* initialize only */
571 memcpy(mgmt->da, bssid, ETH_ALEN);
572 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
573 memcpy(mgmt->bssid, bssid, ETH_ALEN);
574 /* u.deauth.reason_code == u.disassoc.reason_code */
575 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
578 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
579 DEAUTH_DISASSOC_LEN);
583 skb_reserve(skb, local->hw.extra_tx_headroom);
586 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
587 mgmt, DEAUTH_DISASSOC_LEN);
589 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
590 IEEE80211_SKB_CB(skb)->flags |=
591 IEEE80211_TX_INTFL_DONT_ENCRYPT;
592 ieee80211_tx_skb(sdata, skb);
596 void ieee80211_send_pspoll(struct ieee80211_local *local,
597 struct ieee80211_sub_if_data *sdata)
599 struct ieee80211_pspoll *pspoll;
602 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
606 pspoll = (struct ieee80211_pspoll *) skb->data;
607 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
609 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
610 ieee80211_tx_skb(sdata, skb);
613 void ieee80211_send_nullfunc(struct ieee80211_local *local,
614 struct ieee80211_sub_if_data *sdata,
618 struct ieee80211_hdr_3addr *nullfunc;
619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
621 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
625 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
627 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
629 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
630 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
631 IEEE80211_STA_CONNECTION_POLL))
632 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
634 ieee80211_tx_skb(sdata, skb);
637 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
638 struct ieee80211_sub_if_data *sdata)
641 struct ieee80211_hdr *nullfunc;
644 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
647 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
651 skb_reserve(skb, local->hw.extra_tx_headroom);
653 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
654 memset(nullfunc, 0, 30);
655 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
656 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
657 nullfunc->frame_control = fc;
658 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
659 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
660 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
661 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
663 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
664 ieee80211_tx_skb(sdata, skb);
667 /* spectrum management related things */
668 static void ieee80211_chswitch_work(struct work_struct *work)
670 struct ieee80211_sub_if_data *sdata =
671 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
674 if (!ieee80211_sdata_running(sdata))
677 mutex_lock(&ifmgd->mtx);
678 if (!ifmgd->associated)
681 sdata->local->oper_channel = sdata->local->csa_channel;
682 if (!sdata->local->ops->channel_switch) {
683 /* call "hw_config" only if doing sw channel switch */
684 ieee80211_hw_config(sdata->local,
685 IEEE80211_CONF_CHANGE_CHANNEL);
687 /* update the device channel directly */
688 sdata->local->hw.conf.channel = sdata->local->oper_channel;
691 /* XXX: shouldn't really modify cfg80211-owned data! */
692 ifmgd->associated->channel = sdata->local->oper_channel;
694 ieee80211_wake_queues_by_reason(&sdata->local->hw,
695 IEEE80211_QUEUE_STOP_REASON_CSA);
697 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
698 mutex_unlock(&ifmgd->mtx);
701 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
703 struct ieee80211_sub_if_data *sdata;
704 struct ieee80211_if_managed *ifmgd;
706 sdata = vif_to_sdata(vif);
707 ifmgd = &sdata->u.mgd;
709 trace_api_chswitch_done(sdata, success);
712 * If the channel switch was not successful, stay
713 * around on the old channel. We currently lack
714 * good handling of this situation, possibly we
715 * should just drop the association.
717 sdata->local->csa_channel = sdata->local->oper_channel;
720 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
722 EXPORT_SYMBOL(ieee80211_chswitch_done);
724 static void ieee80211_chswitch_timer(unsigned long data)
726 struct ieee80211_sub_if_data *sdata =
727 (struct ieee80211_sub_if_data *) data;
728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
730 if (sdata->local->quiescing) {
731 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
735 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
738 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
739 struct ieee80211_channel_sw_ie *sw_elem,
740 struct ieee80211_bss *bss,
743 struct cfg80211_bss *cbss =
744 container_of((void *)bss, struct cfg80211_bss, priv);
745 struct ieee80211_channel *new_ch;
746 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
747 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
748 cbss->channel->band);
750 ASSERT_MGD_MTX(ifmgd);
752 if (!ifmgd->associated)
755 if (sdata->local->scanning)
758 /* Disregard subsequent beacons if we are already running a timer
761 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
764 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
765 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
768 sdata->local->csa_channel = new_ch;
770 if (sdata->local->ops->channel_switch) {
771 /* use driver's channel switch callback */
772 struct ieee80211_channel_switch ch_switch;
773 memset(&ch_switch, 0, sizeof(ch_switch));
774 ch_switch.timestamp = timestamp;
776 ch_switch.block_tx = true;
777 ieee80211_stop_queues_by_reason(&sdata->local->hw,
778 IEEE80211_QUEUE_STOP_REASON_CSA);
780 ch_switch.channel = new_ch;
781 ch_switch.count = sw_elem->count;
782 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
783 drv_channel_switch(sdata->local, &ch_switch);
787 /* channel switch handled in software */
788 if (sw_elem->count <= 1) {
789 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
792 ieee80211_stop_queues_by_reason(&sdata->local->hw,
793 IEEE80211_QUEUE_STOP_REASON_CSA);
794 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
795 mod_timer(&ifmgd->chswitch_timer,
797 msecs_to_jiffies(sw_elem->count *
798 cbss->beacon_interval));
802 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
803 u16 capab_info, u8 *pwr_constr_elem,
804 u8 pwr_constr_elem_len)
806 struct ieee80211_conf *conf = &sdata->local->hw.conf;
808 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
811 /* Power constraint IE length should be 1 octet */
812 if (pwr_constr_elem_len != 1)
815 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
816 (*pwr_constr_elem != sdata->local->power_constr_level)) {
817 sdata->local->power_constr_level = *pwr_constr_elem;
818 ieee80211_hw_config(sdata->local, 0);
822 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
824 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
825 struct ieee80211_local *local = sdata->local;
826 struct ieee80211_conf *conf = &local->hw.conf;
828 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
829 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
830 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
832 local->disable_dynamic_ps = false;
833 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
835 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
837 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
839 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
840 struct ieee80211_local *local = sdata->local;
841 struct ieee80211_conf *conf = &local->hw.conf;
843 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
844 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
845 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
847 local->disable_dynamic_ps = true;
848 conf->dynamic_ps_timeout = 0;
849 del_timer_sync(&local->dynamic_ps_timer);
850 ieee80211_queue_work(&local->hw,
851 &local->dynamic_ps_enable_work);
853 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
856 static void ieee80211_enable_ps(struct ieee80211_local *local,
857 struct ieee80211_sub_if_data *sdata)
859 struct ieee80211_conf *conf = &local->hw.conf;
862 * If we are scanning right now then the parameters will
863 * take effect when scan finishes.
868 if (conf->dynamic_ps_timeout > 0 &&
869 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
870 mod_timer(&local->dynamic_ps_timer, jiffies +
871 msecs_to_jiffies(conf->dynamic_ps_timeout));
873 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
874 ieee80211_send_nullfunc(local, sdata, 1);
876 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
877 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
880 conf->flags |= IEEE80211_CONF_PS;
881 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
885 static void ieee80211_change_ps(struct ieee80211_local *local)
887 struct ieee80211_conf *conf = &local->hw.conf;
889 if (local->ps_sdata) {
890 ieee80211_enable_ps(local, local->ps_sdata);
891 } else if (conf->flags & IEEE80211_CONF_PS) {
892 conf->flags &= ~IEEE80211_CONF_PS;
893 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
894 del_timer_sync(&local->dynamic_ps_timer);
895 cancel_work_sync(&local->dynamic_ps_enable_work);
899 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
901 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
902 struct sta_info *sta = NULL;
903 bool authorized = false;
911 if (!mgd->associated)
914 if (!mgd->associated->beacon_ies)
917 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
918 IEEE80211_STA_CONNECTION_POLL))
922 sta = sta_info_get(sdata, mgd->bssid);
924 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
930 /* need to hold RTNL or interface lock */
931 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
933 struct ieee80211_sub_if_data *sdata, *found = NULL;
937 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
938 local->ps_sdata = NULL;
942 if (!list_empty(&local->work_list)) {
943 local->ps_sdata = NULL;
947 list_for_each_entry(sdata, &local->interfaces, list) {
948 if (!ieee80211_sdata_running(sdata))
950 if (sdata->vif.type == NL80211_IFTYPE_AP) {
951 /* If an AP vif is found, then disable PS
952 * by setting the count to zero thereby setting
958 if (sdata->vif.type != NL80211_IFTYPE_STATION)
964 if (count == 1 && ieee80211_powersave_allowed(found)) {
965 struct ieee80211_conf *conf = &local->hw.conf;
969 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
971 beaconint_us = ieee80211_tu_to_usec(
972 found->vif.bss_conf.beacon_int);
974 timeout = local->dynamic_ps_forced_timeout;
977 * Go to full PSM if the user configures a very low
978 * latency requirement.
979 * The 2000 second value is there for compatibility
980 * until the PM_QOS_NETWORK_LATENCY is configured
983 if (latency > (1900 * USEC_PER_MSEC) &&
984 latency != (2000 * USEC_PER_SEC))
989 local->dynamic_ps_user_timeout = timeout;
990 if (!local->disable_dynamic_ps)
991 conf->dynamic_ps_timeout =
992 local->dynamic_ps_user_timeout;
994 if (beaconint_us > latency) {
995 local->ps_sdata = NULL;
997 struct ieee80211_bss *bss;
1001 bss = (void *)found->u.mgd.associated->priv;
1002 dtimper = bss->dtim_period;
1004 /* If the TIM IE is invalid, pretend the value is 1 */
1007 else if (dtimper > 1)
1008 maxslp = min_t(int, dtimper,
1009 latency / beaconint_us);
1011 local->hw.conf.max_sleep_period = maxslp;
1012 local->hw.conf.ps_dtim_period = dtimper;
1013 local->ps_sdata = found;
1016 local->ps_sdata = NULL;
1020 ieee80211_change_ps(local);
1023 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1025 struct ieee80211_local *local =
1026 container_of(work, struct ieee80211_local,
1027 dynamic_ps_disable_work);
1029 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1030 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1031 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1034 ieee80211_wake_queues_by_reason(&local->hw,
1035 IEEE80211_QUEUE_STOP_REASON_PS);
1038 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1040 struct ieee80211_local *local =
1041 container_of(work, struct ieee80211_local,
1042 dynamic_ps_enable_work);
1043 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1044 struct ieee80211_if_managed *ifmgd;
1045 unsigned long flags;
1048 /* can only happen when PS was just disabled anyway */
1052 ifmgd = &sdata->u.mgd;
1054 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1057 if (!local->disable_dynamic_ps &&
1058 local->hw.conf.dynamic_ps_timeout > 0) {
1059 /* don't enter PS if TX frames are pending */
1060 if (drv_tx_frames_pending(local)) {
1061 mod_timer(&local->dynamic_ps_timer, jiffies +
1063 local->hw.conf.dynamic_ps_timeout));
1068 * transmission can be stopped by others which leads to
1069 * dynamic_ps_timer expiry. Postpone the ps timer if it
1070 * is not the actual idle state.
1072 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1073 for (q = 0; q < local->hw.queues; q++) {
1074 if (local->queue_stop_reasons[q]) {
1075 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1077 mod_timer(&local->dynamic_ps_timer, jiffies +
1079 local->hw.conf.dynamic_ps_timeout));
1083 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1086 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1087 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1088 netif_tx_stop_all_queues(sdata->dev);
1090 if (drv_tx_frames_pending(local))
1091 mod_timer(&local->dynamic_ps_timer, jiffies +
1093 local->hw.conf.dynamic_ps_timeout));
1095 ieee80211_send_nullfunc(local, sdata, 1);
1096 /* Flush to get the tx status of nullfunc frame */
1097 drv_flush(local, false);
1101 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1102 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1103 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1104 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1105 local->hw.conf.flags |= IEEE80211_CONF_PS;
1106 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1109 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1110 netif_tx_wake_all_queues(sdata->dev);
1113 void ieee80211_dynamic_ps_timer(unsigned long data)
1115 struct ieee80211_local *local = (void *) data;
1117 if (local->quiescing || local->suspended)
1120 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1124 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
1125 struct ieee80211_sub_if_data *sdata,
1126 u8 *wmm_param, size_t wmm_param_len)
1128 struct ieee80211_tx_queue_params params;
1129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1132 u8 *pos, uapsd_queues = 0;
1134 if (!local->ops->conf_tx)
1137 if (local->hw.queues < IEEE80211_NUM_ACS)
1143 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1146 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1147 uapsd_queues = ifmgd->uapsd_queues;
1149 count = wmm_param[6] & 0x0f;
1150 if (count == ifmgd->wmm_last_param_set)
1152 ifmgd->wmm_last_param_set = count;
1154 pos = wmm_param + 8;
1155 left = wmm_param_len - 8;
1157 memset(¶ms, 0, sizeof(params));
1160 for (; left >= 4; left -= 4, pos += 4) {
1161 int aci = (pos[0] >> 5) & 0x03;
1162 int acm = (pos[0] >> 4) & 0x01;
1170 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1171 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1177 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1178 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1184 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1185 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1192 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1193 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1198 params.aifs = pos[0] & 0x0f;
1199 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1200 params.cw_min = ecw2cw(pos[1] & 0x0f);
1201 params.txop = get_unaligned_le16(pos + 2);
1202 params.uapsd = uapsd;
1204 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1205 wiphy_debug(local->hw.wiphy,
1206 "WMM queue=%d aci=%d acm=%d aifs=%d "
1207 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1209 params.aifs, params.cw_min, params.cw_max,
1210 params.txop, params.uapsd);
1212 sdata->tx_conf[queue] = params;
1213 if (drv_conf_tx(local, sdata, queue, ¶ms))
1214 wiphy_debug(local->hw.wiphy,
1215 "failed to set TX queue parameters for queue %d\n",
1219 /* enable WMM or activate new settings */
1220 sdata->vif.bss_conf.qos = true;
1223 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1224 u16 capab, bool erp_valid, u8 erp)
1226 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1228 bool use_protection;
1229 bool use_short_preamble;
1230 bool use_short_slot;
1233 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1234 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1236 use_protection = false;
1237 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1240 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1241 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1242 use_short_slot = true;
1244 if (use_protection != bss_conf->use_cts_prot) {
1245 bss_conf->use_cts_prot = use_protection;
1246 changed |= BSS_CHANGED_ERP_CTS_PROT;
1249 if (use_short_preamble != bss_conf->use_short_preamble) {
1250 bss_conf->use_short_preamble = use_short_preamble;
1251 changed |= BSS_CHANGED_ERP_PREAMBLE;
1254 if (use_short_slot != bss_conf->use_short_slot) {
1255 bss_conf->use_short_slot = use_short_slot;
1256 changed |= BSS_CHANGED_ERP_SLOT;
1262 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1263 struct cfg80211_bss *cbss,
1264 u32 bss_info_changed)
1266 struct ieee80211_bss *bss = (void *)cbss->priv;
1267 struct ieee80211_local *local = sdata->local;
1268 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1270 bss_info_changed |= BSS_CHANGED_ASSOC;
1271 /* set timing information */
1272 bss_conf->beacon_int = cbss->beacon_interval;
1273 bss_conf->last_tsf = cbss->tsf;
1275 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1276 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1277 cbss->capability, bss->has_erp_value, bss->erp_value);
1279 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1280 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1282 sdata->u.mgd.associated = cbss;
1283 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1285 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1287 /* just to be sure */
1288 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1289 IEEE80211_STA_BEACON_POLL);
1291 ieee80211_led_assoc(local, 1);
1293 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1294 bss_conf->dtim_period = bss->dtim_period;
1296 bss_conf->dtim_period = 0;
1298 bss_conf->assoc = 1;
1300 /* Tell the driver to monitor connection quality (if supported) */
1301 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1302 bss_conf->cqm_rssi_thold)
1303 bss_info_changed |= BSS_CHANGED_CQM;
1305 /* Enable ARP filtering */
1306 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1307 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1308 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1311 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1313 mutex_lock(&local->iflist_mtx);
1314 ieee80211_recalc_ps(local, -1);
1315 ieee80211_recalc_smps(local);
1316 mutex_unlock(&local->iflist_mtx);
1318 netif_tx_start_all_queues(sdata->dev);
1319 netif_carrier_on(sdata->dev);
1322 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1323 u16 stype, u16 reason, bool tx,
1326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1327 struct ieee80211_local *local = sdata->local;
1328 struct sta_info *sta;
1332 ASSERT_MGD_MTX(ifmgd);
1334 if (WARN_ON_ONCE(tx && !frame_buf))
1337 if (WARN_ON(!ifmgd->associated))
1340 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1342 ifmgd->associated = NULL;
1343 memset(ifmgd->bssid, 0, ETH_ALEN);
1346 * we need to commit the associated = NULL change because the
1347 * scan code uses that to determine whether this iface should
1348 * go to/wake up from powersave or not -- and could otherwise
1349 * wake the queues erroneously.
1354 * Thus, we can only afterwards stop the queues -- to account
1355 * for the case where another CPU is finishing a scan at this
1356 * time -- we don't want the scan code to enable queues.
1359 netif_tx_stop_all_queues(sdata->dev);
1360 netif_carrier_off(sdata->dev);
1362 mutex_lock(&local->sta_mtx);
1363 sta = sta_info_get(sdata, bssid);
1365 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1366 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1368 mutex_unlock(&local->sta_mtx);
1370 /* deauthenticate/disassociate now */
1371 if (tx || frame_buf)
1372 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1375 /* flush out frame */
1377 drv_flush(local, false);
1379 /* remove AP and TDLS peers */
1380 sta_info_flush(local, sdata);
1382 /* finally reset all BSS / config parameters */
1383 changed |= ieee80211_reset_erp_info(sdata);
1385 ieee80211_led_assoc(local, 0);
1386 changed |= BSS_CHANGED_ASSOC;
1387 sdata->vif.bss_conf.assoc = false;
1389 /* on the next assoc, re-program HT parameters */
1390 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1391 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1393 local->power_constr_level = 0;
1395 del_timer_sync(&local->dynamic_ps_timer);
1396 cancel_work_sync(&local->dynamic_ps_enable_work);
1398 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1399 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1400 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1402 local->ps_sdata = NULL;
1404 /* Disable ARP filtering */
1405 if (sdata->vif.bss_conf.arp_filter_enabled) {
1406 sdata->vif.bss_conf.arp_filter_enabled = false;
1407 changed |= BSS_CHANGED_ARP_FILTER;
1410 sdata->vif.bss_conf.qos = false;
1411 changed |= BSS_CHANGED_QOS;
1413 /* The BSSID (not really interesting) and HT changed */
1414 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1415 ieee80211_bss_info_change_notify(sdata, changed);
1417 /* channel(_type) changes are handled by ieee80211_hw_config */
1418 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1419 ieee80211_hw_config(local, 0);
1421 /* disassociated - set to defaults now */
1422 ieee80211_set_wmm_default(sdata, false);
1424 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1425 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1426 del_timer_sync(&sdata->u.mgd.timer);
1427 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1430 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1431 struct ieee80211_hdr *hdr)
1434 * We can postpone the mgd.timer whenever receiving unicast frames
1435 * from AP because we know that the connection is working both ways
1436 * at that time. But multicast frames (and hence also beacons) must
1437 * be ignored here, because we need to trigger the timer during
1438 * data idle periods for sending the periodic probe request to the
1439 * AP we're connected to.
1441 if (is_multicast_ether_addr(hdr->addr1))
1444 ieee80211_sta_reset_conn_monitor(sdata);
1447 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1450 struct ieee80211_local *local = sdata->local;
1452 mutex_lock(&local->mtx);
1453 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1454 IEEE80211_STA_CONNECTION_POLL))) {
1455 mutex_unlock(&local->mtx);
1459 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1460 IEEE80211_STA_BEACON_POLL);
1462 mutex_lock(&local->iflist_mtx);
1463 ieee80211_recalc_ps(local, -1);
1464 mutex_unlock(&local->iflist_mtx);
1466 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1470 * We've received a probe response, but are not sure whether
1471 * we have or will be receiving any beacons or data, so let's
1472 * schedule the timers again, just in case.
1474 ieee80211_sta_reset_beacon_monitor(sdata);
1476 mod_timer(&ifmgd->conn_mon_timer,
1477 round_jiffies_up(jiffies +
1478 IEEE80211_CONNECTION_IDLE_TIME));
1480 ieee80211_run_deferred_scan(local);
1481 mutex_unlock(&local->mtx);
1484 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1485 struct ieee80211_hdr *hdr, bool ack)
1487 if (!ieee80211_is_data(hdr->frame_control))
1491 ieee80211_sta_reset_conn_monitor(sdata);
1493 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1494 sdata->u.mgd.probe_send_count > 0) {
1496 sdata->u.mgd.probe_send_count = 0;
1498 sdata->u.mgd.nullfunc_failed = true;
1499 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1503 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1505 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1507 u8 *dst = ifmgd->associated->bssid;
1508 u8 unicast_limit = max(1, max_probe_tries - 3);
1511 * Try sending broadcast probe requests for the last three
1512 * probe requests after the first ones failed since some
1513 * buggy APs only support broadcast probe requests.
1515 if (ifmgd->probe_send_count >= unicast_limit)
1519 * When the hardware reports an accurate Tx ACK status, it's
1520 * better to send a nullfunc frame instead of a probe request,
1521 * as it will kick us off the AP quickly if we aren't associated
1522 * anymore. The timeout will be reset if the frame is ACKed by
1525 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1526 ifmgd->nullfunc_failed = false;
1527 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1531 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1532 if (WARN_ON_ONCE(ssid == NULL))
1537 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1538 0, (u32) -1, true, false);
1541 ifmgd->probe_send_count++;
1542 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1543 run_again(ifmgd, ifmgd->probe_timeout);
1544 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1545 drv_flush(sdata->local, false);
1548 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1551 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1552 bool already = false;
1554 if (!ieee80211_sdata_running(sdata))
1557 mutex_lock(&ifmgd->mtx);
1559 if (!ifmgd->associated)
1562 mutex_lock(&sdata->local->mtx);
1564 if (sdata->local->tmp_channel || sdata->local->scanning) {
1565 mutex_unlock(&sdata->local->mtx);
1569 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1571 net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
1576 * The driver/our work has already reported this event or the
1577 * connection monitoring has kicked in and we have already sent
1578 * a probe request. Or maybe the AP died and the driver keeps
1579 * reporting until we disassociate...
1581 * In either case we have to ignore the current call to this
1582 * function (except for setting the correct probe reason bit)
1583 * because otherwise we would reset the timer every time and
1584 * never check whether we received a probe response!
1586 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1587 IEEE80211_STA_CONNECTION_POLL))
1591 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1593 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1595 mutex_unlock(&sdata->local->mtx);
1600 mutex_lock(&sdata->local->iflist_mtx);
1601 ieee80211_recalc_ps(sdata->local, -1);
1602 mutex_unlock(&sdata->local->iflist_mtx);
1604 ifmgd->probe_send_count = 0;
1605 ieee80211_mgd_probe_ap_send(sdata);
1607 mutex_unlock(&ifmgd->mtx);
1610 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1611 struct ieee80211_vif *vif)
1613 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1615 struct sk_buff *skb;
1619 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1622 ASSERT_MGD_MTX(ifmgd);
1624 if (!ifmgd->associated)
1627 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1628 if (WARN_ON_ONCE(ssid == NULL))
1633 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1634 (u32) -1, ssid + 2, ssid_len,
1639 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1641 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1644 struct ieee80211_local *local = sdata->local;
1646 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1648 mutex_lock(&ifmgd->mtx);
1649 if (!ifmgd->associated) {
1650 mutex_unlock(&ifmgd->mtx);
1654 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1656 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1657 sdata->name, bssid);
1659 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1660 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1662 mutex_unlock(&ifmgd->mtx);
1665 * must be outside lock due to cfg80211,
1666 * but that's not a problem.
1668 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
1670 mutex_lock(&local->mtx);
1671 ieee80211_recalc_idle(local);
1672 mutex_unlock(&local->mtx);
1675 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1677 struct ieee80211_sub_if_data *sdata =
1678 container_of(work, struct ieee80211_sub_if_data,
1679 u.mgd.beacon_connection_loss_work);
1680 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1681 struct sta_info *sta;
1683 if (ifmgd->associated) {
1685 sta = sta_info_get(sdata, ifmgd->bssid);
1687 sta->beacon_loss_count++;
1691 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1692 __ieee80211_connection_loss(sdata);
1694 ieee80211_mgd_probe_ap(sdata, true);
1697 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1699 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1700 struct ieee80211_hw *hw = &sdata->local->hw;
1702 trace_api_beacon_loss(sdata);
1704 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1705 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1707 EXPORT_SYMBOL(ieee80211_beacon_loss);
1709 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1711 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1712 struct ieee80211_hw *hw = &sdata->local->hw;
1714 trace_api_connection_loss(sdata);
1716 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1717 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1719 EXPORT_SYMBOL(ieee80211_connection_loss);
1722 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1725 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1727 lockdep_assert_held(&sdata->u.mgd.mtx);
1730 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1732 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1733 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1736 cfg80211_put_bss(auth_data->bss);
1738 sdata->u.mgd.auth_data = NULL;
1741 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1742 struct ieee80211_mgmt *mgmt, size_t len)
1744 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1746 struct ieee802_11_elems elems;
1748 pos = mgmt->u.auth.variable;
1749 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1750 if (!elems.challenge)
1752 auth_data->expected_transaction = 4;
1753 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1754 elems.challenge - 2, elems.challenge_len + 2,
1755 auth_data->bss->bssid, auth_data->bss->bssid,
1756 auth_data->key, auth_data->key_len,
1757 auth_data->key_idx);
1760 static enum rx_mgmt_action __must_check
1761 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1762 struct ieee80211_mgmt *mgmt, size_t len)
1764 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1766 u16 auth_alg, auth_transaction, status_code;
1767 struct sta_info *sta;
1769 lockdep_assert_held(&ifmgd->mtx);
1772 return RX_MGMT_NONE;
1774 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1775 return RX_MGMT_NONE;
1777 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1779 if (!ether_addr_equal(bssid, mgmt->bssid))
1780 return RX_MGMT_NONE;
1782 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1783 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1784 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1786 if (auth_alg != ifmgd->auth_data->algorithm ||
1787 auth_transaction != ifmgd->auth_data->expected_transaction)
1788 return RX_MGMT_NONE;
1790 if (status_code != WLAN_STATUS_SUCCESS) {
1791 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1792 sdata->name, mgmt->sa, status_code);
1796 switch (ifmgd->auth_data->algorithm) {
1797 case WLAN_AUTH_OPEN:
1798 case WLAN_AUTH_LEAP:
1801 case WLAN_AUTH_SHARED_KEY:
1802 if (ifmgd->auth_data->expected_transaction != 4) {
1803 ieee80211_auth_challenge(sdata, mgmt, len);
1804 /* need another frame */
1805 return RX_MGMT_NONE;
1809 WARN_ONCE(1, "invalid auth alg %d",
1810 ifmgd->auth_data->algorithm);
1811 return RX_MGMT_NONE;
1814 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1816 ifmgd->auth_data->done = true;
1817 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1818 run_again(ifmgd, ifmgd->auth_data->timeout);
1820 /* move station state to auth */
1821 mutex_lock(&sdata->local->sta_mtx);
1822 sta = sta_info_get(sdata, bssid);
1824 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1827 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1828 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1829 sdata->name, bssid);
1832 mutex_unlock(&sdata->local->sta_mtx);
1834 return RX_MGMT_CFG80211_RX_AUTH;
1836 mutex_unlock(&sdata->local->sta_mtx);
1837 /* ignore frame -- wait for timeout */
1838 return RX_MGMT_NONE;
1842 static enum rx_mgmt_action __must_check
1843 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1844 struct ieee80211_mgmt *mgmt, size_t len)
1846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1847 const u8 *bssid = NULL;
1850 lockdep_assert_held(&ifmgd->mtx);
1853 return RX_MGMT_NONE;
1855 if (!ifmgd->associated ||
1856 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1857 return RX_MGMT_NONE;
1859 bssid = ifmgd->associated->bssid;
1861 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1863 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1864 sdata->name, bssid, reason_code);
1866 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1868 mutex_lock(&sdata->local->mtx);
1869 ieee80211_recalc_idle(sdata->local);
1870 mutex_unlock(&sdata->local->mtx);
1872 return RX_MGMT_CFG80211_DEAUTH;
1876 static enum rx_mgmt_action __must_check
1877 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1878 struct ieee80211_mgmt *mgmt, size_t len)
1880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1883 lockdep_assert_held(&ifmgd->mtx);
1886 return RX_MGMT_NONE;
1888 if (!ifmgd->associated ||
1889 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1890 return RX_MGMT_NONE;
1892 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1894 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1895 sdata->name, mgmt->sa, reason_code);
1897 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1899 mutex_lock(&sdata->local->mtx);
1900 ieee80211_recalc_idle(sdata->local);
1901 mutex_unlock(&sdata->local->mtx);
1903 return RX_MGMT_CFG80211_DISASSOC;
1906 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1907 u8 *supp_rates, unsigned int supp_rates_len,
1908 u32 *rates, u32 *basic_rates,
1909 bool *have_higher_than_11mbit,
1910 int *min_rate, int *min_rate_index)
1914 for (i = 0; i < supp_rates_len; i++) {
1915 int rate = (supp_rates[i] & 0x7f) * 5;
1916 bool is_basic = !!(supp_rates[i] & 0x80);
1919 *have_higher_than_11mbit = true;
1922 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1923 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1925 * Note: Even through the membership selector and the basic
1926 * rate flag share the same bit, they are not exactly
1929 if (!!(supp_rates[i] & 0x80) &&
1930 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1933 for (j = 0; j < sband->n_bitrates; j++) {
1934 if (sband->bitrates[j].bitrate == rate) {
1937 *basic_rates |= BIT(j);
1938 if (rate < *min_rate) {
1940 *min_rate_index = j;
1948 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1951 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1953 lockdep_assert_held(&sdata->u.mgd.mtx);
1956 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1958 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1959 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1963 sdata->u.mgd.assoc_data = NULL;
1966 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1967 struct cfg80211_bss *cbss,
1968 struct ieee80211_mgmt *mgmt, size_t len)
1970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1971 struct ieee80211_local *local = sdata->local;
1972 struct ieee80211_supported_band *sband;
1973 struct sta_info *sta;
1975 u16 capab_info, aid;
1976 struct ieee802_11_elems elems;
1977 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1981 /* AssocResp and ReassocResp have identical structure */
1983 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1984 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1986 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1988 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1990 aid &= ~(BIT(15) | BIT(14));
1992 ifmgd->broken_ap = false;
1994 if (aid == 0 || aid > IEEE80211_MAX_AID) {
1996 "%s: invalid AID value %d (out of range), turn off PS\n",
1999 ifmgd->broken_ap = true;
2002 pos = mgmt->u.assoc_resp.variable;
2003 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2005 if (!elems.supp_rates) {
2006 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2013 mutex_lock(&sdata->local->sta_mtx);
2015 * station info was already allocated and inserted before
2016 * the association and should be available to us
2018 sta = sta_info_get(sdata, cbss->bssid);
2019 if (WARN_ON(!sta)) {
2020 mutex_unlock(&sdata->local->sta_mtx);
2024 sband = local->hw.wiphy->bands[local->oper_channel->band];
2026 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2027 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2028 elems.ht_cap_elem, &sta->sta.ht_cap);
2030 sta->supports_40mhz =
2031 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2033 rate_control_rate_init(sta);
2035 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2036 set_sta_flag(sta, WLAN_STA_MFP);
2038 if (elems.wmm_param)
2039 set_sta_flag(sta, WLAN_STA_WME);
2041 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2043 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2044 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2045 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2048 "%s: failed to move station %pM to desired state\n",
2049 sdata->name, sta->sta.addr);
2050 WARN_ON(__sta_info_destroy(sta));
2051 mutex_unlock(&sdata->local->sta_mtx);
2055 mutex_unlock(&sdata->local->sta_mtx);
2058 * Always handle WMM once after association regardless
2059 * of the first value the AP uses. Setting -1 here has
2060 * that effect because the AP values is an unsigned
2063 ifmgd->wmm_last_param_set = -1;
2065 if (elems.wmm_param)
2066 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2067 elems.wmm_param_len);
2069 ieee80211_set_wmm_default(sdata, false);
2070 changed |= BSS_CHANGED_QOS;
2072 if (elems.ht_operation && elems.wmm_param &&
2073 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2074 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2075 cbss->bssid, false);
2077 /* set AID and assoc capability,
2078 * ieee80211_set_associated() will tell the driver */
2079 bss_conf->aid = aid;
2080 bss_conf->assoc_capability = capab_info;
2081 ieee80211_set_associated(sdata, cbss, changed);
2084 * If we're using 4-addr mode, let the AP know that we're
2085 * doing so, so that it can create the STA VLAN on its side
2087 if (ifmgd->use_4addr)
2088 ieee80211_send_4addr_nullfunc(local, sdata);
2091 * Start timer to probe the connection to the AP now.
2092 * Also start the timer that will detect beacon loss.
2094 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2095 ieee80211_sta_reset_beacon_monitor(sdata);
2100 static enum rx_mgmt_action __must_check
2101 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2102 struct ieee80211_mgmt *mgmt, size_t len,
2103 struct cfg80211_bss **bss)
2105 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2106 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2107 u16 capab_info, status_code, aid;
2108 struct ieee802_11_elems elems;
2112 lockdep_assert_held(&ifmgd->mtx);
2115 return RX_MGMT_NONE;
2116 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2117 return RX_MGMT_NONE;
2120 * AssocResp and ReassocResp have identical structure, so process both
2121 * of them in this function.
2125 return RX_MGMT_NONE;
2127 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2128 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2129 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2130 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2132 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2133 "status=%d aid=%d)\n",
2134 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2135 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2137 pos = mgmt->u.assoc_resp.variable;
2138 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2140 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2141 elems.timeout_int && elems.timeout_int_len == 5 &&
2142 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2144 tu = get_unaligned_le32(elems.timeout_int + 1);
2145 ms = tu * 1024 / 1000;
2146 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2147 "comeback duration %u TU (%u ms)\n",
2148 sdata->name, mgmt->sa, tu, ms);
2149 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2150 if (ms > IEEE80211_ASSOC_TIMEOUT)
2151 run_again(ifmgd, assoc_data->timeout);
2152 return RX_MGMT_NONE;
2155 *bss = assoc_data->bss;
2157 if (status_code != WLAN_STATUS_SUCCESS) {
2158 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2159 sdata->name, mgmt->sa, status_code);
2160 ieee80211_destroy_assoc_data(sdata, false);
2162 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2164 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2165 /* oops -- internal error -- send timeout for now */
2166 ieee80211_destroy_assoc_data(sdata, true);
2167 sta_info_destroy_addr(sdata, mgmt->bssid);
2168 cfg80211_put_bss(*bss);
2169 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2173 * destroy assoc_data afterwards, as otherwise an idle
2174 * recalc after assoc_data is NULL but before associated
2175 * is set can cause the interface to go idle
2177 ieee80211_destroy_assoc_data(sdata, true);
2180 return RX_MGMT_CFG80211_RX_ASSOC;
2182 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2183 struct ieee80211_mgmt *mgmt,
2185 struct ieee80211_rx_status *rx_status,
2186 struct ieee802_11_elems *elems,
2189 struct ieee80211_local *local = sdata->local;
2191 struct ieee80211_bss *bss;
2192 struct ieee80211_channel *channel;
2193 bool need_ps = false;
2195 if (sdata->u.mgd.associated &&
2196 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
2197 bss = (void *)sdata->u.mgd.associated->priv;
2198 /* not previously set so we may need to recalc */
2199 need_ps = !bss->dtim_period;
2202 if (elems->ds_params && elems->ds_params_len == 1)
2203 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2206 freq = rx_status->freq;
2208 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2210 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2213 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2216 ieee80211_rx_bss_put(local, bss);
2218 if (!sdata->u.mgd.associated)
2222 mutex_lock(&local->iflist_mtx);
2223 ieee80211_recalc_ps(local, -1);
2224 mutex_unlock(&local->iflist_mtx);
2227 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
2228 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
2230 struct ieee80211_channel_sw_ie *sw_elem =
2231 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
2232 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2233 bss, rx_status->mactime);
2238 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2239 struct sk_buff *skb)
2241 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2242 struct ieee80211_if_managed *ifmgd;
2243 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2244 size_t baselen, len = skb->len;
2245 struct ieee802_11_elems elems;
2247 ifmgd = &sdata->u.mgd;
2249 ASSERT_MGD_MTX(ifmgd);
2251 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2252 return; /* ignore ProbeResp to foreign address */
2254 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2258 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2261 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2263 if (ifmgd->associated &&
2264 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2265 ieee80211_reset_ap_probe(sdata);
2267 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2268 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2269 /* got probe response, continue with auth */
2270 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2271 ifmgd->auth_data->tries = 0;
2272 ifmgd->auth_data->timeout = jiffies;
2273 run_again(ifmgd, ifmgd->auth_data->timeout);
2278 * This is the canonical list of information elements we care about,
2279 * the filter code also gives us all changes to the Microsoft OUI
2280 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2282 * We implement beacon filtering in software since that means we can
2283 * avoid processing the frame here and in cfg80211, and userspace
2284 * will not be able to tell whether the hardware supports it or not.
2286 * XXX: This list needs to be dynamic -- userspace needs to be able to
2287 * add items it requires. It also needs to be able to tell us to
2288 * look out for other vendor IEs.
2290 static const u64 care_about_ies =
2291 (1ULL << WLAN_EID_COUNTRY) |
2292 (1ULL << WLAN_EID_ERP_INFO) |
2293 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2294 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2295 (1ULL << WLAN_EID_HT_CAPABILITY) |
2296 (1ULL << WLAN_EID_HT_OPERATION);
2298 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2299 struct ieee80211_mgmt *mgmt,
2301 struct ieee80211_rx_status *rx_status)
2303 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2304 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2306 struct ieee802_11_elems elems;
2307 struct ieee80211_local *local = sdata->local;
2309 bool erp_valid, directed_tim = false;
2314 lockdep_assert_held(&ifmgd->mtx);
2316 /* Process beacon from the current BSS */
2317 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2321 if (rx_status->freq != local->hw.conf.channel->center_freq)
2324 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2325 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2326 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2327 len - baselen, &elems);
2329 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2331 ifmgd->assoc_data->have_beacon = true;
2332 ifmgd->assoc_data->sent_assoc = false;
2333 /* continue assoc process */
2334 ifmgd->assoc_data->timeout = jiffies;
2335 run_again(ifmgd, ifmgd->assoc_data->timeout);
2339 if (!ifmgd->associated ||
2340 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2342 bssid = ifmgd->associated->bssid;
2344 /* Track average RSSI from the Beacon frames of the current AP */
2345 ifmgd->last_beacon_signal = rx_status->signal;
2346 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2347 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2348 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2349 ifmgd->last_cqm_event_signal = 0;
2350 ifmgd->count_beacon_signal = 1;
2351 ifmgd->last_ave_beacon_signal = 0;
2353 ifmgd->ave_beacon_signal =
2354 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2355 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2356 ifmgd->ave_beacon_signal) / 16;
2357 ifmgd->count_beacon_signal++;
2360 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2361 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2362 int sig = ifmgd->ave_beacon_signal;
2363 int last_sig = ifmgd->last_ave_beacon_signal;
2366 * if signal crosses either of the boundaries, invoke callback
2367 * with appropriate parameters
2369 if (sig > ifmgd->rssi_max_thold &&
2370 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2371 ifmgd->last_ave_beacon_signal = sig;
2372 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2373 } else if (sig < ifmgd->rssi_min_thold &&
2374 (last_sig >= ifmgd->rssi_max_thold ||
2376 ifmgd->last_ave_beacon_signal = sig;
2377 drv_rssi_callback(local, RSSI_EVENT_LOW);
2381 if (bss_conf->cqm_rssi_thold &&
2382 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2383 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2384 int sig = ifmgd->ave_beacon_signal / 16;
2385 int last_event = ifmgd->last_cqm_event_signal;
2386 int thold = bss_conf->cqm_rssi_thold;
2387 int hyst = bss_conf->cqm_rssi_hyst;
2389 (last_event == 0 || sig < last_event - hyst)) {
2390 ifmgd->last_cqm_event_signal = sig;
2391 ieee80211_cqm_rssi_notify(
2393 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2395 } else if (sig > thold &&
2396 (last_event == 0 || sig > last_event + hyst)) {
2397 ifmgd->last_cqm_event_signal = sig;
2398 ieee80211_cqm_rssi_notify(
2400 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2405 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2406 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2407 net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
2410 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2411 mutex_lock(&local->iflist_mtx);
2412 ieee80211_recalc_ps(local, -1);
2413 mutex_unlock(&local->iflist_mtx);
2417 * Push the beacon loss detection into the future since
2418 * we are processing a beacon from the AP just now.
2420 ieee80211_sta_reset_beacon_monitor(sdata);
2422 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2423 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2424 len - baselen, &elems,
2425 care_about_ies, ncrc);
2427 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2428 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2431 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
2432 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2435 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2436 elems.wmm_param_len);
2439 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2441 if (local->hw.conf.dynamic_ps_timeout > 0) {
2442 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2443 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2444 ieee80211_hw_config(local,
2445 IEEE80211_CONF_CHANGE_PS);
2447 ieee80211_send_nullfunc(local, sdata, 0);
2448 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2449 local->pspolling = true;
2452 * Here is assumed that the driver will be
2453 * able to send ps-poll frame and receive a
2454 * response even though power save mode is
2455 * enabled, but some drivers might require
2456 * to disable power save here. This needs
2457 * to be investigated.
2459 ieee80211_send_pspoll(local, sdata);
2464 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2466 ifmgd->beacon_crc = ncrc;
2467 ifmgd->beacon_crc_valid = true;
2469 if (elems.erp_info && elems.erp_info_len >= 1) {
2471 erp_value = elems.erp_info[0];
2475 changed |= ieee80211_handle_bss_capability(sdata,
2476 le16_to_cpu(mgmt->u.beacon.capab_info),
2477 erp_valid, erp_value);
2480 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
2481 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
2482 struct ieee80211_supported_band *sband;
2484 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2486 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2490 /* Note: country IE parsing is done for us by cfg80211 */
2491 if (elems.country_elem) {
2492 /* TODO: IBSS also needs this */
2493 if (elems.pwr_constr_elem)
2494 ieee80211_handle_pwr_constr(sdata,
2495 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2496 elems.pwr_constr_elem,
2497 elems.pwr_constr_elem_len);
2500 ieee80211_bss_info_change_notify(sdata, changed);
2503 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2504 struct sk_buff *skb)
2506 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2507 struct ieee80211_rx_status *rx_status;
2508 struct ieee80211_mgmt *mgmt;
2509 struct cfg80211_bss *bss = NULL;
2510 enum rx_mgmt_action rma = RX_MGMT_NONE;
2513 rx_status = (struct ieee80211_rx_status *) skb->cb;
2514 mgmt = (struct ieee80211_mgmt *) skb->data;
2515 fc = le16_to_cpu(mgmt->frame_control);
2517 mutex_lock(&ifmgd->mtx);
2519 switch (fc & IEEE80211_FCTL_STYPE) {
2520 case IEEE80211_STYPE_BEACON:
2521 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2523 case IEEE80211_STYPE_PROBE_RESP:
2524 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2526 case IEEE80211_STYPE_AUTH:
2527 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2529 case IEEE80211_STYPE_DEAUTH:
2530 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2532 case IEEE80211_STYPE_DISASSOC:
2533 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2535 case IEEE80211_STYPE_ASSOC_RESP:
2536 case IEEE80211_STYPE_REASSOC_RESP:
2537 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2539 case IEEE80211_STYPE_ACTION:
2540 switch (mgmt->u.action.category) {
2541 case WLAN_CATEGORY_SPECTRUM_MGMT:
2542 ieee80211_sta_process_chanswitch(sdata,
2543 &mgmt->u.action.u.chan_switch.sw_elem,
2544 (void *)ifmgd->associated->priv,
2545 rx_status->mactime);
2549 mutex_unlock(&ifmgd->mtx);
2555 case RX_MGMT_CFG80211_DEAUTH:
2556 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2558 case RX_MGMT_CFG80211_DISASSOC:
2559 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2561 case RX_MGMT_CFG80211_RX_AUTH:
2562 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2564 case RX_MGMT_CFG80211_RX_ASSOC:
2565 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2567 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2568 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2571 WARN(1, "unexpected: %d", rma);
2575 static void ieee80211_sta_timer(unsigned long data)
2577 struct ieee80211_sub_if_data *sdata =
2578 (struct ieee80211_sub_if_data *) data;
2579 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2580 struct ieee80211_local *local = sdata->local;
2582 if (local->quiescing) {
2583 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2587 ieee80211_queue_work(&local->hw, &sdata->work);
2590 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2591 u8 *bssid, u8 reason)
2593 struct ieee80211_local *local = sdata->local;
2594 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2595 u8 frame_buf[DEAUTH_DISASSOC_LEN];
2597 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2598 IEEE80211_STA_BEACON_POLL);
2600 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2602 mutex_unlock(&ifmgd->mtx);
2605 * must be outside lock due to cfg80211,
2606 * but that's not a problem.
2608 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
2610 mutex_lock(&local->mtx);
2611 ieee80211_recalc_idle(local);
2612 mutex_unlock(&local->mtx);
2614 mutex_lock(&ifmgd->mtx);
2617 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2619 struct ieee80211_local *local = sdata->local;
2620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2621 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2623 lockdep_assert_held(&ifmgd->mtx);
2625 if (WARN_ON_ONCE(!auth_data))
2630 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2631 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2632 sdata->name, auth_data->bss->bssid);
2635 * Most likely AP is not in the range so remove the
2636 * bss struct for that AP.
2638 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2643 if (auth_data->bss->proberesp_ies) {
2644 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2645 sdata->name, auth_data->bss->bssid, auth_data->tries,
2646 IEEE80211_AUTH_MAX_TRIES);
2648 auth_data->expected_transaction = 2;
2649 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2650 auth_data->ie, auth_data->ie_len,
2651 auth_data->bss->bssid,
2652 auth_data->bss->bssid, NULL, 0, 0);
2656 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2657 sdata->name, auth_data->bss->bssid, auth_data->tries,
2658 IEEE80211_AUTH_MAX_TRIES);
2660 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2664 * Direct probe is sent to broadcast address as some APs
2665 * will not answer to direct packet in unassociated state.
2667 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2668 NULL, 0, (u32) -1, true, false);
2671 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2672 run_again(ifmgd, auth_data->timeout);
2677 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2679 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2680 struct ieee80211_local *local = sdata->local;
2682 lockdep_assert_held(&sdata->u.mgd.mtx);
2684 assoc_data->tries++;
2685 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2686 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2687 sdata->name, assoc_data->bss->bssid);
2690 * Most likely AP is not in the range so remove the
2691 * bss struct for that AP.
2693 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2698 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2699 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2700 IEEE80211_ASSOC_MAX_TRIES);
2701 ieee80211_send_assoc(sdata);
2703 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2704 run_again(&sdata->u.mgd, assoc_data->timeout);
2709 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2711 struct ieee80211_local *local = sdata->local;
2712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2714 mutex_lock(&ifmgd->mtx);
2716 if (ifmgd->auth_data &&
2717 time_after(jiffies, ifmgd->auth_data->timeout)) {
2718 if (ifmgd->auth_data->done) {
2720 * ok ... we waited for assoc but userspace didn't,
2721 * so let's just kill the auth data
2723 ieee80211_destroy_auth_data(sdata, false);
2724 } else if (ieee80211_probe_auth(sdata)) {
2727 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2729 ieee80211_destroy_auth_data(sdata, false);
2731 mutex_unlock(&ifmgd->mtx);
2732 cfg80211_send_auth_timeout(sdata->dev, bssid);
2733 mutex_lock(&ifmgd->mtx);
2735 } else if (ifmgd->auth_data)
2736 run_again(ifmgd, ifmgd->auth_data->timeout);
2738 if (ifmgd->assoc_data &&
2739 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2740 if (!ifmgd->assoc_data->have_beacon ||
2741 ieee80211_do_assoc(sdata)) {
2744 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2746 ieee80211_destroy_assoc_data(sdata, false);
2748 mutex_unlock(&ifmgd->mtx);
2749 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2750 mutex_lock(&ifmgd->mtx);
2752 } else if (ifmgd->assoc_data)
2753 run_again(ifmgd, ifmgd->assoc_data->timeout);
2755 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2756 IEEE80211_STA_CONNECTION_POLL) &&
2757 ifmgd->associated) {
2761 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2763 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2764 max_tries = max_nullfunc_tries;
2766 max_tries = max_probe_tries;
2768 /* ACK received for nullfunc probing frame */
2769 if (!ifmgd->probe_send_count)
2770 ieee80211_reset_ap_probe(sdata);
2771 else if (ifmgd->nullfunc_failed) {
2772 if (ifmgd->probe_send_count < max_tries) {
2773 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2774 wiphy_debug(local->hw.wiphy,
2775 "%s: No ack for nullfunc frame to"
2776 " AP %pM, try %d/%i\n",
2778 ifmgd->probe_send_count, max_tries);
2780 ieee80211_mgd_probe_ap_send(sdata);
2782 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2783 wiphy_debug(local->hw.wiphy,
2784 "%s: No ack for nullfunc frame to"
2785 " AP %pM, disconnecting.\n",
2786 sdata->name, bssid);
2788 ieee80211_sta_connection_lost(sdata, bssid,
2789 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2791 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2792 run_again(ifmgd, ifmgd->probe_timeout);
2793 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2794 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2795 wiphy_debug(local->hw.wiphy,
2796 "%s: Failed to send nullfunc to AP %pM"
2797 " after %dms, disconnecting.\n",
2799 bssid, probe_wait_ms);
2801 ieee80211_sta_connection_lost(sdata, bssid,
2802 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2803 } else if (ifmgd->probe_send_count < max_tries) {
2804 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2805 wiphy_debug(local->hw.wiphy,
2806 "%s: No probe response from AP %pM"
2807 " after %dms, try %d/%i\n",
2809 bssid, probe_wait_ms,
2810 ifmgd->probe_send_count, max_tries);
2812 ieee80211_mgd_probe_ap_send(sdata);
2815 * We actually lost the connection ... or did we?
2818 wiphy_debug(local->hw.wiphy,
2819 "%s: No probe response from AP %pM"
2820 " after %dms, disconnecting.\n",
2822 bssid, probe_wait_ms);
2824 ieee80211_sta_connection_lost(sdata, bssid,
2825 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2829 mutex_unlock(&ifmgd->mtx);
2831 mutex_lock(&local->mtx);
2832 ieee80211_recalc_idle(local);
2833 mutex_unlock(&local->mtx);
2836 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2838 struct ieee80211_sub_if_data *sdata =
2839 (struct ieee80211_sub_if_data *) data;
2840 struct ieee80211_local *local = sdata->local;
2842 if (local->quiescing)
2845 ieee80211_queue_work(&sdata->local->hw,
2846 &sdata->u.mgd.beacon_connection_loss_work);
2849 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2851 struct ieee80211_sub_if_data *sdata =
2852 (struct ieee80211_sub_if_data *) data;
2853 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2854 struct ieee80211_local *local = sdata->local;
2856 if (local->quiescing)
2859 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2862 static void ieee80211_sta_monitor_work(struct work_struct *work)
2864 struct ieee80211_sub_if_data *sdata =
2865 container_of(work, struct ieee80211_sub_if_data,
2866 u.mgd.monitor_work);
2868 ieee80211_mgd_probe_ap(sdata, false);
2871 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2875 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2876 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2877 IEEE80211_STA_CONNECTION_POLL);
2879 /* let's probe the connection once */
2880 flags = sdata->local->hw.flags;
2881 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2882 ieee80211_queue_work(&sdata->local->hw,
2883 &sdata->u.mgd.monitor_work);
2884 /* and do all the other regular work too */
2885 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2890 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2895 * we need to use atomic bitops for the running bits
2896 * only because both timers might fire at the same
2897 * time -- the code here is properly synchronised.
2900 cancel_work_sync(&ifmgd->request_smps_work);
2902 cancel_work_sync(&ifmgd->monitor_work);
2903 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
2904 if (del_timer_sync(&ifmgd->timer))
2905 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2907 cancel_work_sync(&ifmgd->chswitch_work);
2908 if (del_timer_sync(&ifmgd->chswitch_timer))
2909 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2911 /* these will just be re-established on connection */
2912 del_timer_sync(&ifmgd->conn_mon_timer);
2913 del_timer_sync(&ifmgd->bcn_mon_timer);
2916 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2920 if (!ifmgd->associated)
2923 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2924 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2925 mutex_lock(&ifmgd->mtx);
2926 if (ifmgd->associated) {
2927 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2928 wiphy_debug(sdata->local->hw.wiphy,
2929 "%s: driver requested disconnect after resume.\n",
2932 ieee80211_sta_connection_lost(sdata,
2933 ifmgd->associated->bssid,
2934 WLAN_REASON_UNSPECIFIED);
2935 mutex_unlock(&ifmgd->mtx);
2938 mutex_unlock(&ifmgd->mtx);
2941 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2942 add_timer(&ifmgd->timer);
2943 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2944 add_timer(&ifmgd->chswitch_timer);
2945 ieee80211_sta_reset_beacon_monitor(sdata);
2946 ieee80211_restart_sta_timer(sdata);
2950 /* interface setup */
2951 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2953 struct ieee80211_if_managed *ifmgd;
2955 ifmgd = &sdata->u.mgd;
2956 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2957 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2958 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2959 ieee80211_beacon_connection_loss_work);
2960 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
2961 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2962 (unsigned long) sdata);
2963 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2964 (unsigned long) sdata);
2965 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2966 (unsigned long) sdata);
2967 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2968 (unsigned long) sdata);
2971 ifmgd->powersave = sdata->wdev.ps;
2972 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2973 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
2975 mutex_init(&ifmgd->mtx);
2977 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2978 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2980 ifmgd->req_smps = IEEE80211_SMPS_OFF;
2983 /* scan finished notification */
2984 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2986 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2988 /* Restart STA timers */
2990 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2991 ieee80211_restart_sta_timer(sdata);
2995 int ieee80211_max_network_latency(struct notifier_block *nb,
2996 unsigned long data, void *dummy)
2998 s32 latency_usec = (s32) data;
2999 struct ieee80211_local *local =
3000 container_of(nb, struct ieee80211_local,
3001 network_latency_notifier);
3003 mutex_lock(&local->iflist_mtx);
3004 ieee80211_recalc_ps(local, latency_usec);
3005 mutex_unlock(&local->iflist_mtx);
3010 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3011 struct cfg80211_bss *cbss, bool assoc)
3013 struct ieee80211_local *local = sdata->local;
3014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3015 struct ieee80211_bss *bss = (void *)cbss->priv;
3016 struct sta_info *sta;
3017 bool have_sta = false;
3020 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3021 const u8 *ht_oper_ie;
3022 const struct ieee80211_ht_operation *ht_oper = NULL;
3023 struct ieee80211_supported_band *sband;
3025 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3030 have_sta = sta_info_get(sdata, cbss->bssid);
3035 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3040 mutex_lock(&local->mtx);
3041 ieee80211_recalc_idle(sdata->local);
3042 mutex_unlock(&local->mtx);
3044 /* switch to the right channel */
3045 sband = local->hw.wiphy->bands[cbss->channel->band];
3047 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3049 if (sband->ht_cap.ht_supported) {
3050 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3051 cbss->information_elements,
3052 cbss->len_information_elements);
3053 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3054 ht_oper = (void *)(ht_oper_ie + 2);
3058 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3059 cbss->channel->band);
3060 /* check that channel matches the right operating channel */
3061 if (cbss->channel->center_freq != ht_cfreq) {
3063 * It's possible that some APs are confused here;
3064 * Netgear WNDR3700 sometimes reports 4 higher than
3065 * the actual channel in association responses, but
3066 * since we look at probe response/beacon data here
3070 "%s: Wrong control channel: center-freq: %d"
3071 " ht-cfreq: %d ht->primary_chan: %d"
3072 " band: %d. Disabling HT.\n",
3073 sdata->name, cbss->channel->center_freq,
3074 ht_cfreq, ht_oper->primary_chan,
3075 cbss->channel->band);
3081 channel_type = NL80211_CHAN_HT20;
3083 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3084 switch (ht_oper->ht_param &
3085 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3086 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3087 channel_type = NL80211_CHAN_HT40PLUS;
3089 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3090 channel_type = NL80211_CHAN_HT40MINUS;
3096 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3097 /* can only fail due to HT40+/- mismatch */
3098 channel_type = NL80211_CHAN_HT20;
3100 "%s: disabling 40 MHz due to multi-vif mismatch\n",
3102 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3103 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3107 local->oper_channel = cbss->channel;
3108 ieee80211_hw_config(local, 0);
3111 u32 rates = 0, basic_rates = 0;
3112 bool have_higher_than_11mbit;
3113 int min_rate = INT_MAX, min_rate_index = -1;
3115 ieee80211_get_rates(sband, bss->supp_rates,
3116 bss->supp_rates_len,
3117 &rates, &basic_rates,
3118 &have_higher_than_11mbit,
3119 &min_rate, &min_rate_index);
3122 * This used to be a workaround for basic rates missing
3123 * in the association response frame. Now that we no
3124 * longer use the basic rates from there, it probably
3125 * doesn't happen any more, but keep the workaround so
3126 * in case some *other* APs are buggy in different ways
3127 * we can connect -- with a warning.
3129 if (!basic_rates && min_rate_index >= 0) {
3131 "%s: No basic rates, using min rate instead.\n",
3133 basic_rates = BIT(min_rate_index);
3136 sta->sta.supp_rates[cbss->channel->band] = rates;
3137 sdata->vif.bss_conf.basic_rates = basic_rates;
3139 /* cf. IEEE 802.11 9.2.12 */
3140 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3141 have_higher_than_11mbit)
3142 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3144 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3146 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3148 /* tell driver about BSSID and basic rates */
3149 ieee80211_bss_info_change_notify(sdata,
3150 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
3153 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3155 err = sta_info_insert(sta);
3159 "%s: failed to insert STA entry for the AP (error %d)\n",
3164 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3170 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3171 struct cfg80211_auth_request *req)
3173 struct ieee80211_local *local = sdata->local;
3174 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3175 struct ieee80211_mgd_auth_data *auth_data;
3179 /* prepare auth data structure */
3181 switch (req->auth_type) {
3182 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3183 auth_alg = WLAN_AUTH_OPEN;
3185 case NL80211_AUTHTYPE_SHARED_KEY:
3186 if (IS_ERR(local->wep_tx_tfm))
3188 auth_alg = WLAN_AUTH_SHARED_KEY;
3190 case NL80211_AUTHTYPE_FT:
3191 auth_alg = WLAN_AUTH_FT;
3193 case NL80211_AUTHTYPE_NETWORK_EAP:
3194 auth_alg = WLAN_AUTH_LEAP;
3200 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3204 auth_data->bss = req->bss;
3206 if (req->ie && req->ie_len) {
3207 memcpy(auth_data->ie, req->ie, req->ie_len);
3208 auth_data->ie_len = req->ie_len;
3211 if (req->key && req->key_len) {
3212 auth_data->key_len = req->key_len;
3213 auth_data->key_idx = req->key_idx;
3214 memcpy(auth_data->key, req->key, req->key_len);
3217 auth_data->algorithm = auth_alg;
3219 /* try to authenticate/probe */
3221 mutex_lock(&ifmgd->mtx);
3223 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3224 ifmgd->assoc_data) {
3229 if (ifmgd->auth_data)
3230 ieee80211_destroy_auth_data(sdata, false);
3232 /* prep auth_data so we don't go into idle on disassoc */
3233 ifmgd->auth_data = auth_data;
3235 if (ifmgd->associated)
3236 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3238 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3239 sdata->name, req->bss->bssid);
3241 err = ieee80211_prep_connection(sdata, req->bss, false);
3245 err = ieee80211_probe_auth(sdata);
3247 sta_info_destroy_addr(sdata, req->bss->bssid);
3251 /* hold our own reference */
3252 cfg80211_ref_bss(auth_data->bss);
3257 ifmgd->auth_data = NULL;
3261 mutex_unlock(&ifmgd->mtx);
3266 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3267 struct cfg80211_assoc_request *req)
3269 struct ieee80211_local *local = sdata->local;
3270 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3271 struct ieee80211_bss *bss = (void *)req->bss->priv;
3272 struct ieee80211_mgd_assoc_data *assoc_data;
3273 struct ieee80211_supported_band *sband;
3277 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3281 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3285 mutex_lock(&ifmgd->mtx);
3287 if (ifmgd->associated)
3288 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3290 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3295 if (ifmgd->assoc_data) {
3300 if (ifmgd->auth_data) {
3303 /* keep sta info, bssid if matching */
3304 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3305 ieee80211_destroy_auth_data(sdata, match);
3308 /* prepare assoc data */
3310 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
3311 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
3313 ifmgd->beacon_crc_valid = false;
3316 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3317 * We still associate in non-HT mode (11a/b/g) if any one of these
3318 * ciphers is configured as pairwise.
3319 * We can set this to true for non-11n hardware, that'll be checked
3320 * separately along with the peer capabilities.
3322 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3323 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3324 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3325 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3326 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3328 if (req->flags & ASSOC_REQ_DISABLE_HT)
3329 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3331 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3332 sband = local->hw.wiphy->bands[req->bss->channel->band];
3333 if (!sband->ht_cap.ht_supported ||
3334 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used)
3335 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3337 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3338 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3339 sizeof(ifmgd->ht_capa_mask));
3341 if (req->ie && req->ie_len) {
3342 memcpy(assoc_data->ie, req->ie, req->ie_len);
3343 assoc_data->ie_len = req->ie_len;
3346 assoc_data->bss = req->bss;
3348 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3349 if (ifmgd->powersave)
3350 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3352 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3354 ifmgd->ap_smps = ifmgd->req_smps;
3356 assoc_data->capability = req->bss->capability;
3357 assoc_data->wmm = bss->wmm_used &&
3358 (local->hw.queues >= IEEE80211_NUM_ACS);
3359 assoc_data->supp_rates = bss->supp_rates;
3360 assoc_data->supp_rates_len = bss->supp_rates_len;
3361 assoc_data->ht_operation_ie =
3362 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3364 if (bss->wmm_used && bss->uapsd_supported &&
3365 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3366 assoc_data->uapsd = true;
3367 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3369 assoc_data->uapsd = false;
3370 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3373 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3374 assoc_data->ssid_len = ssidie[1];
3376 if (req->prev_bssid)
3377 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3380 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3381 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3383 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3384 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3387 if (req->crypto.control_port)
3388 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3390 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3392 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3393 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3395 /* kick off associate process */
3397 ifmgd->assoc_data = assoc_data;
3399 err = ieee80211_prep_connection(sdata, req->bss, true);
3403 if (!bss->dtim_period &&
3404 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3406 * Wait up to one beacon interval ...
3407 * should this be more if we miss one?
3409 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3410 sdata->name, ifmgd->bssid);
3411 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
3413 assoc_data->have_beacon = true;
3414 assoc_data->sent_assoc = false;
3415 assoc_data->timeout = jiffies;
3417 run_again(ifmgd, assoc_data->timeout);
3419 if (bss->corrupt_data) {
3420 char *corrupt_type = "data";
3421 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3422 if (bss->corrupt_data &
3423 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3424 corrupt_type = "beacon and probe response";
3426 corrupt_type = "beacon";
3427 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3428 corrupt_type = "probe response";
3429 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3430 sdata->name, corrupt_type);
3436 ifmgd->assoc_data = NULL;
3440 mutex_unlock(&ifmgd->mtx);
3445 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
3446 struct cfg80211_deauth_request *req)
3448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3449 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3451 mutex_lock(&ifmgd->mtx);
3453 if (ifmgd->auth_data) {
3454 ieee80211_destroy_auth_data(sdata, false);
3455 mutex_unlock(&ifmgd->mtx);
3460 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
3461 sdata->name, req->bssid, req->reason_code);
3463 if (ifmgd->associated &&
3464 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
3465 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3466 req->reason_code, true, frame_buf);
3468 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3469 IEEE80211_STYPE_DEAUTH,
3470 req->reason_code, true,
3472 mutex_unlock(&ifmgd->mtx);
3474 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3476 mutex_lock(&sdata->local->mtx);
3477 ieee80211_recalc_idle(sdata->local);
3478 mutex_unlock(&sdata->local->mtx);
3483 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
3484 struct cfg80211_disassoc_request *req)
3486 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3488 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3490 mutex_lock(&ifmgd->mtx);
3493 * cfg80211 should catch this ... but it's racy since
3494 * we can receive a disassoc frame, process it, hand it
3495 * to cfg80211 while that's in a locked section already
3496 * trying to tell us that the user wants to disconnect.
3498 if (ifmgd->associated != req->bss) {
3499 mutex_unlock(&ifmgd->mtx);
3503 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
3504 sdata->name, req->bss->bssid, req->reason_code);
3506 memcpy(bssid, req->bss->bssid, ETH_ALEN);
3507 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3508 req->reason_code, !req->local_state_change,
3510 mutex_unlock(&ifmgd->mtx);
3512 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3514 mutex_lock(&sdata->local->mtx);
3515 ieee80211_recalc_idle(sdata->local);
3516 mutex_unlock(&sdata->local->mtx);
3521 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
3523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3525 mutex_lock(&ifmgd->mtx);
3526 if (ifmgd->assoc_data)
3527 ieee80211_destroy_assoc_data(sdata, false);
3528 if (ifmgd->auth_data)
3529 ieee80211_destroy_auth_data(sdata, false);
3530 del_timer_sync(&ifmgd->timer);
3531 mutex_unlock(&ifmgd->mtx);
3534 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3535 enum nl80211_cqm_rssi_threshold_event rssi_event,
3538 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3540 trace_api_cqm_rssi_notify(sdata, rssi_event);
3542 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3544 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
3546 unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3548 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3549 return sdata->dev->operstate;
3551 EXPORT_SYMBOL(ieee80211_get_operstate);