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 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
152 mod_timer(&sdata->u.mgd.bcn_mon_timer,
153 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
156 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
160 if (unlikely(!sdata->u.mgd.associated))
163 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
166 mod_timer(&sdata->u.mgd.conn_mon_timer,
167 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
169 ifmgd->probe_send_count = 0;
172 static int ecw2cw(int ecw)
174 return (1 << ecw) - 1;
177 static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
178 struct ieee80211_ht_operation *ht_oper,
179 const u8 *bssid, bool reconfig)
181 struct ieee80211_local *local = sdata->local;
182 struct ieee80211_supported_band *sband;
183 struct sta_info *sta;
186 bool disable_40 = false;
188 sband = local->hw.wiphy->bands[local->oper_channel->band];
190 switch (sdata->vif.bss_conf.channel_type) {
191 case NL80211_CHAN_HT40PLUS:
192 if (local->oper_channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
195 case NL80211_CHAN_HT40MINUS:
196 if (local->oper_channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
203 /* This can change during the lifetime of the BSS */
204 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
207 mutex_lock(&local->sta_mtx);
208 sta = sta_info_get(sdata, bssid);
212 if (sta && !sta->supports_40mhz)
215 if (sta && (!reconfig ||
216 (disable_40 != !(sta->sta.ht_cap.cap &
217 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
220 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
222 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
224 rate_control_rate_update(local, sband, sta,
225 IEEE80211_RC_BW_CHANGED);
227 mutex_unlock(&local->sta_mtx);
229 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
231 /* if bss configuration changed store the new one */
232 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
233 changed |= BSS_CHANGED_HT;
234 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
240 /* frame sending functions */
242 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
243 struct ieee80211_supported_band *sband,
249 for (i = 0; i < supp_rates_len; i++) {
250 int rate = (supp_rates[i] & 0x7F) * 5;
252 for (j = 0; j < sband->n_bitrates; j++)
253 if (sband->bitrates[j].bitrate == rate) {
263 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
264 struct sk_buff *skb, u8 ap_ht_param,
265 struct ieee80211_supported_band *sband,
266 struct ieee80211_channel *channel,
267 enum ieee80211_smps_mode smps)
270 u32 flags = channel->flags;
272 struct ieee80211_sta_ht_cap ht_cap;
274 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
276 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
277 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
279 /* determine capability flags */
282 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
283 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
284 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
285 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
286 cap &= ~IEEE80211_HT_CAP_SGI_40;
289 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
290 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
291 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
292 cap &= ~IEEE80211_HT_CAP_SGI_40;
298 * If 40 MHz was disabled associate as though we weren't
299 * capable of 40 MHz -- some broken APs will never fall
300 * back to trying to transmit in 20 MHz.
302 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
303 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
304 cap &= ~IEEE80211_HT_CAP_SGI_40;
307 /* set SM PS mode properly */
308 cap &= ~IEEE80211_HT_CAP_SM_PS;
310 case IEEE80211_SMPS_AUTOMATIC:
311 case IEEE80211_SMPS_NUM_MODES:
313 case IEEE80211_SMPS_OFF:
314 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
315 IEEE80211_HT_CAP_SM_PS_SHIFT;
317 case IEEE80211_SMPS_STATIC:
318 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
319 IEEE80211_HT_CAP_SM_PS_SHIFT;
321 case IEEE80211_SMPS_DYNAMIC:
322 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
323 IEEE80211_HT_CAP_SM_PS_SHIFT;
327 /* reserve and fill IE */
328 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
329 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
332 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
334 struct ieee80211_supported_band *sband)
338 struct ieee80211_sta_vht_cap vht_cap;
340 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
342 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
344 /* determine capability flags */
347 /* reserve and fill IE */
348 pos = skb_put(skb, sizeof(struct ieee80211_vht_capabilities) + 2);
349 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
352 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
354 struct ieee80211_local *local = sdata->local;
355 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
356 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
358 struct ieee80211_mgmt *mgmt;
360 size_t offset = 0, noffset;
361 int i, count, rates_len, supp_rates_len;
363 struct ieee80211_supported_band *sband;
366 lockdep_assert_held(&ifmgd->mtx);
368 sband = local->hw.wiphy->bands[local->oper_channel->band];
370 if (assoc_data->supp_rates_len) {
372 * Get all rates supported by the device and the AP as
373 * some APs don't like getting a superset of their rates
374 * in the association request (e.g. D-Link DAP 1353 in
377 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
378 assoc_data->supp_rates_len,
382 * In case AP not provide any supported rates information
383 * before association, we send information element(s) with
384 * all rates that we support.
387 rates_len = sband->n_bitrates;
390 skb = alloc_skb(local->hw.extra_tx_headroom +
391 sizeof(*mgmt) + /* bit too much but doesn't matter */
392 2 + assoc_data->ssid_len + /* SSID */
393 4 + rates_len + /* (extended) rates */
394 4 + /* power capability */
395 2 + 2 * sband->n_channels + /* supported channels */
396 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
397 2 + sizeof(struct ieee80211_vht_capabilities) + /* VHT */
398 assoc_data->ie_len + /* extra IEs */
404 skb_reserve(skb, local->hw.extra_tx_headroom);
406 capab = WLAN_CAPABILITY_ESS;
408 if (sband->band == IEEE80211_BAND_2GHZ) {
409 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
410 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
411 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
412 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
415 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
416 capab |= WLAN_CAPABILITY_PRIVACY;
418 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
419 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
420 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
422 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
424 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
425 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
426 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
428 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
430 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
431 IEEE80211_STYPE_REASSOC_REQ);
432 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
433 mgmt->u.reassoc_req.listen_interval =
434 cpu_to_le16(local->hw.conf.listen_interval);
435 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
439 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
440 IEEE80211_STYPE_ASSOC_REQ);
441 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
442 mgmt->u.assoc_req.listen_interval =
443 cpu_to_le16(local->hw.conf.listen_interval);
447 pos = skb_put(skb, 2 + assoc_data->ssid_len);
448 *pos++ = WLAN_EID_SSID;
449 *pos++ = assoc_data->ssid_len;
450 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
452 /* add all rates which were marked to be used above */
453 supp_rates_len = rates_len;
454 if (supp_rates_len > 8)
457 pos = skb_put(skb, supp_rates_len + 2);
458 *pos++ = WLAN_EID_SUPP_RATES;
459 *pos++ = supp_rates_len;
462 for (i = 0; i < sband->n_bitrates; i++) {
463 if (BIT(i) & rates) {
464 int rate = sband->bitrates[i].bitrate;
465 *pos++ = (u8) (rate / 5);
471 if (rates_len > count) {
472 pos = skb_put(skb, rates_len - count + 2);
473 *pos++ = WLAN_EID_EXT_SUPP_RATES;
474 *pos++ = rates_len - count;
476 for (i++; i < sband->n_bitrates; i++) {
477 if (BIT(i) & rates) {
478 int rate = sband->bitrates[i].bitrate;
479 *pos++ = (u8) (rate / 5);
484 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
485 /* 1. power capabilities */
486 pos = skb_put(skb, 4);
487 *pos++ = WLAN_EID_PWR_CAPABILITY;
489 *pos++ = 0; /* min tx power */
490 *pos++ = local->oper_channel->max_power; /* max tx power */
492 /* 2. supported channels */
493 /* TODO: get this in reg domain format */
494 pos = skb_put(skb, 2 * sband->n_channels + 2);
495 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
496 *pos++ = 2 * sband->n_channels;
497 for (i = 0; i < sband->n_channels; i++) {
498 *pos++ = ieee80211_frequency_to_channel(
499 sband->channels[i].center_freq);
500 *pos++ = 1; /* one channel in the subband*/
504 /* if present, add any custom IEs that go before HT */
505 if (assoc_data->ie_len && assoc_data->ie) {
506 static const u8 before_ht[] = {
509 WLAN_EID_EXT_SUPP_RATES,
510 WLAN_EID_PWR_CAPABILITY,
511 WLAN_EID_SUPPORTED_CHANNELS,
514 WLAN_EID_RRM_ENABLED_CAPABILITIES,
515 WLAN_EID_MOBILITY_DOMAIN,
516 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
518 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
519 before_ht, ARRAY_SIZE(before_ht),
521 pos = skb_put(skb, noffset - offset);
522 memcpy(pos, assoc_data->ie + offset, noffset - offset);
526 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
527 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
528 sband, local->oper_channel, ifmgd->ap_smps);
530 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
531 ieee80211_add_vht_ie(sdata, skb, sband);
533 /* if present, add any custom non-vendor IEs that go after HT */
534 if (assoc_data->ie_len && assoc_data->ie) {
535 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
538 pos = skb_put(skb, noffset - offset);
539 memcpy(pos, assoc_data->ie + offset, noffset - offset);
543 if (assoc_data->wmm) {
544 if (assoc_data->uapsd) {
545 qos_info = ifmgd->uapsd_queues;
546 qos_info |= (ifmgd->uapsd_max_sp_len <<
547 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
552 pos = skb_put(skb, 9);
553 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
554 *pos++ = 7; /* len */
555 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
558 *pos++ = 2; /* WME */
559 *pos++ = 0; /* WME info */
560 *pos++ = 1; /* WME ver */
564 /* add any remaining custom (i.e. vendor specific here) IEs */
565 if (assoc_data->ie_len && assoc_data->ie) {
566 noffset = assoc_data->ie_len;
567 pos = skb_put(skb, noffset - offset);
568 memcpy(pos, assoc_data->ie + offset, noffset - offset);
571 drv_mgd_prepare_tx(local, sdata);
573 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
574 ieee80211_tx_skb(sdata, skb);
577 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
578 const u8 *bssid, u16 stype,
579 u16 reason, bool send_frame,
582 struct ieee80211_local *local = sdata->local;
583 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
585 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
588 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
589 mgmt->duration = 0; /* initialize only */
590 mgmt->seq_ctrl = 0; /* initialize only */
591 memcpy(mgmt->da, bssid, ETH_ALEN);
592 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
593 memcpy(mgmt->bssid, bssid, ETH_ALEN);
594 /* u.deauth.reason_code == u.disassoc.reason_code */
595 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
598 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
599 DEAUTH_DISASSOC_LEN);
603 skb_reserve(skb, local->hw.extra_tx_headroom);
606 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
607 mgmt, DEAUTH_DISASSOC_LEN);
609 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
610 IEEE80211_SKB_CB(skb)->flags |=
611 IEEE80211_TX_INTFL_DONT_ENCRYPT;
613 ieee80211_tx_skb(sdata, skb);
617 void ieee80211_send_pspoll(struct ieee80211_local *local,
618 struct ieee80211_sub_if_data *sdata)
620 struct ieee80211_pspoll *pspoll;
623 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
627 pspoll = (struct ieee80211_pspoll *) skb->data;
628 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
630 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
631 ieee80211_tx_skb(sdata, skb);
634 void ieee80211_send_nullfunc(struct ieee80211_local *local,
635 struct ieee80211_sub_if_data *sdata,
639 struct ieee80211_hdr_3addr *nullfunc;
640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
642 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
646 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
648 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
650 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
651 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
652 IEEE80211_STA_CONNECTION_POLL))
653 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
655 ieee80211_tx_skb(sdata, skb);
658 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
659 struct ieee80211_sub_if_data *sdata)
662 struct ieee80211_hdr *nullfunc;
665 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
668 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
672 skb_reserve(skb, local->hw.extra_tx_headroom);
674 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
675 memset(nullfunc, 0, 30);
676 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
677 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
678 nullfunc->frame_control = fc;
679 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
680 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
681 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
682 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
684 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
685 ieee80211_tx_skb(sdata, skb);
688 /* spectrum management related things */
689 static void ieee80211_chswitch_work(struct work_struct *work)
691 struct ieee80211_sub_if_data *sdata =
692 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
693 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
695 if (!ieee80211_sdata_running(sdata))
698 mutex_lock(&ifmgd->mtx);
699 if (!ifmgd->associated)
702 sdata->local->oper_channel = sdata->local->csa_channel;
703 if (!sdata->local->ops->channel_switch) {
704 /* call "hw_config" only if doing sw channel switch */
705 ieee80211_hw_config(sdata->local,
706 IEEE80211_CONF_CHANGE_CHANNEL);
708 /* update the device channel directly */
709 sdata->local->hw.conf.channel = sdata->local->oper_channel;
712 /* XXX: shouldn't really modify cfg80211-owned data! */
713 ifmgd->associated->channel = sdata->local->oper_channel;
715 /* XXX: wait for a beacon first? */
716 ieee80211_wake_queues_by_reason(&sdata->local->hw,
717 IEEE80211_QUEUE_STOP_REASON_CSA);
719 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
720 mutex_unlock(&ifmgd->mtx);
723 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
725 struct ieee80211_sub_if_data *sdata;
726 struct ieee80211_if_managed *ifmgd;
728 sdata = vif_to_sdata(vif);
729 ifmgd = &sdata->u.mgd;
731 trace_api_chswitch_done(sdata, success);
734 * If the channel switch was not successful, stay
735 * around on the old channel. We currently lack
736 * good handling of this situation, possibly we
737 * should just drop the association.
739 sdata->local->csa_channel = sdata->local->oper_channel;
742 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
744 EXPORT_SYMBOL(ieee80211_chswitch_done);
746 static void ieee80211_chswitch_timer(unsigned long data)
748 struct ieee80211_sub_if_data *sdata =
749 (struct ieee80211_sub_if_data *) data;
750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
752 if (sdata->local->quiescing) {
753 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
757 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
760 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
761 struct ieee80211_channel_sw_ie *sw_elem,
762 struct ieee80211_bss *bss,
765 struct cfg80211_bss *cbss =
766 container_of((void *)bss, struct cfg80211_bss, priv);
767 struct ieee80211_channel *new_ch;
768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
769 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
770 cbss->channel->band);
772 ASSERT_MGD_MTX(ifmgd);
774 if (!ifmgd->associated)
777 if (sdata->local->scanning)
780 /* Disregard subsequent beacons if we are already running a timer
783 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
786 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
787 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
790 sdata->local->csa_channel = new_ch;
792 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
795 ieee80211_stop_queues_by_reason(&sdata->local->hw,
796 IEEE80211_QUEUE_STOP_REASON_CSA);
798 if (sdata->local->ops->channel_switch) {
799 /* use driver's channel switch callback */
800 struct ieee80211_channel_switch ch_switch = {
801 .timestamp = timestamp,
802 .block_tx = sw_elem->mode,
804 .count = sw_elem->count,
807 drv_channel_switch(sdata->local, &ch_switch);
811 /* channel switch handled in software */
812 if (sw_elem->count <= 1)
813 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
815 mod_timer(&ifmgd->chswitch_timer,
816 TU_TO_EXP_TIME(sw_elem->count *
817 cbss->beacon_interval));
820 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
821 u16 capab_info, u8 *pwr_constr_elem,
822 u8 pwr_constr_elem_len)
824 struct ieee80211_conf *conf = &sdata->local->hw.conf;
826 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
829 /* Power constraint IE length should be 1 octet */
830 if (pwr_constr_elem_len != 1)
833 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
834 (*pwr_constr_elem != sdata->local->power_constr_level)) {
835 sdata->local->power_constr_level = *pwr_constr_elem;
836 ieee80211_hw_config(sdata->local, 0);
840 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
842 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
843 struct ieee80211_local *local = sdata->local;
844 struct ieee80211_conf *conf = &local->hw.conf;
846 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
847 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
848 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
850 local->disable_dynamic_ps = false;
851 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
853 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
855 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
857 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
858 struct ieee80211_local *local = sdata->local;
859 struct ieee80211_conf *conf = &local->hw.conf;
861 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
862 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
863 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
865 local->disable_dynamic_ps = true;
866 conf->dynamic_ps_timeout = 0;
867 del_timer_sync(&local->dynamic_ps_timer);
868 ieee80211_queue_work(&local->hw,
869 &local->dynamic_ps_enable_work);
871 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
874 static void ieee80211_enable_ps(struct ieee80211_local *local,
875 struct ieee80211_sub_if_data *sdata)
877 struct ieee80211_conf *conf = &local->hw.conf;
880 * If we are scanning right now then the parameters will
881 * take effect when scan finishes.
886 if (conf->dynamic_ps_timeout > 0 &&
887 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
888 mod_timer(&local->dynamic_ps_timer, jiffies +
889 msecs_to_jiffies(conf->dynamic_ps_timeout));
891 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
892 ieee80211_send_nullfunc(local, sdata, 1);
894 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
895 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
898 conf->flags |= IEEE80211_CONF_PS;
899 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
903 static void ieee80211_change_ps(struct ieee80211_local *local)
905 struct ieee80211_conf *conf = &local->hw.conf;
907 if (local->ps_sdata) {
908 ieee80211_enable_ps(local, local->ps_sdata);
909 } else if (conf->flags & IEEE80211_CONF_PS) {
910 conf->flags &= ~IEEE80211_CONF_PS;
911 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
912 del_timer_sync(&local->dynamic_ps_timer);
913 cancel_work_sync(&local->dynamic_ps_enable_work);
917 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
919 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
920 struct sta_info *sta = NULL;
921 bool authorized = false;
929 if (!mgd->associated)
932 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
933 IEEE80211_STA_CONNECTION_POLL))
937 sta = sta_info_get(sdata, mgd->bssid);
939 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
945 /* need to hold RTNL or interface lock */
946 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
948 struct ieee80211_sub_if_data *sdata, *found = NULL;
952 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
953 local->ps_sdata = NULL;
957 list_for_each_entry(sdata, &local->interfaces, list) {
958 if (!ieee80211_sdata_running(sdata))
960 if (sdata->vif.type == NL80211_IFTYPE_AP) {
961 /* If an AP vif is found, then disable PS
962 * by setting the count to zero thereby setting
968 if (sdata->vif.type != NL80211_IFTYPE_STATION)
974 if (count == 1 && ieee80211_powersave_allowed(found)) {
975 struct ieee80211_conf *conf = &local->hw.conf;
979 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
981 beaconint_us = ieee80211_tu_to_usec(
982 found->vif.bss_conf.beacon_int);
984 timeout = local->dynamic_ps_forced_timeout;
987 * Go to full PSM if the user configures a very low
988 * latency requirement.
989 * The 2000 second value is there for compatibility
990 * until the PM_QOS_NETWORK_LATENCY is configured
993 if (latency > (1900 * USEC_PER_MSEC) &&
994 latency != (2000 * USEC_PER_SEC))
999 local->dynamic_ps_user_timeout = timeout;
1000 if (!local->disable_dynamic_ps)
1001 conf->dynamic_ps_timeout =
1002 local->dynamic_ps_user_timeout;
1004 if (beaconint_us > latency) {
1005 local->ps_sdata = NULL;
1007 struct ieee80211_bss *bss;
1011 bss = (void *)found->u.mgd.associated->priv;
1012 dtimper = bss->dtim_period;
1014 /* If the TIM IE is invalid, pretend the value is 1 */
1017 else if (dtimper > 1)
1018 maxslp = min_t(int, dtimper,
1019 latency / beaconint_us);
1021 local->hw.conf.max_sleep_period = maxslp;
1022 local->hw.conf.ps_dtim_period = dtimper;
1023 local->ps_sdata = found;
1026 local->ps_sdata = NULL;
1029 ieee80211_change_ps(local);
1032 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1034 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1036 if (sdata->vif.bss_conf.ps != ps_allowed) {
1037 sdata->vif.bss_conf.ps = ps_allowed;
1038 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1042 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1044 struct ieee80211_local *local =
1045 container_of(work, struct ieee80211_local,
1046 dynamic_ps_disable_work);
1048 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1049 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1050 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1053 ieee80211_wake_queues_by_reason(&local->hw,
1054 IEEE80211_QUEUE_STOP_REASON_PS);
1057 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1059 struct ieee80211_local *local =
1060 container_of(work, struct ieee80211_local,
1061 dynamic_ps_enable_work);
1062 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1063 struct ieee80211_if_managed *ifmgd;
1064 unsigned long flags;
1067 /* can only happen when PS was just disabled anyway */
1071 ifmgd = &sdata->u.mgd;
1073 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1076 if (!local->disable_dynamic_ps &&
1077 local->hw.conf.dynamic_ps_timeout > 0) {
1078 /* don't enter PS if TX frames are pending */
1079 if (drv_tx_frames_pending(local)) {
1080 mod_timer(&local->dynamic_ps_timer, jiffies +
1082 local->hw.conf.dynamic_ps_timeout));
1087 * transmission can be stopped by others which leads to
1088 * dynamic_ps_timer expiry. Postpone the ps timer if it
1089 * is not the actual idle state.
1091 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1092 for (q = 0; q < local->hw.queues; q++) {
1093 if (local->queue_stop_reasons[q]) {
1094 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1096 mod_timer(&local->dynamic_ps_timer, jiffies +
1098 local->hw.conf.dynamic_ps_timeout));
1102 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1105 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1106 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1107 netif_tx_stop_all_queues(sdata->dev);
1109 if (drv_tx_frames_pending(local))
1110 mod_timer(&local->dynamic_ps_timer, jiffies +
1112 local->hw.conf.dynamic_ps_timeout));
1114 ieee80211_send_nullfunc(local, sdata, 1);
1115 /* Flush to get the tx status of nullfunc frame */
1116 drv_flush(local, false);
1120 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1121 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1122 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1123 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1124 local->hw.conf.flags |= IEEE80211_CONF_PS;
1125 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1128 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1129 netif_tx_wake_all_queues(sdata->dev);
1132 void ieee80211_dynamic_ps_timer(unsigned long data)
1134 struct ieee80211_local *local = (void *) data;
1136 if (local->quiescing || local->suspended)
1139 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1143 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1144 struct ieee80211_sub_if_data *sdata,
1145 u8 *wmm_param, size_t wmm_param_len)
1147 struct ieee80211_tx_queue_params params;
1148 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1151 u8 *pos, uapsd_queues = 0;
1153 if (!local->ops->conf_tx)
1156 if (local->hw.queues < IEEE80211_NUM_ACS)
1162 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1165 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1166 uapsd_queues = ifmgd->uapsd_queues;
1168 count = wmm_param[6] & 0x0f;
1169 if (count == ifmgd->wmm_last_param_set)
1171 ifmgd->wmm_last_param_set = count;
1173 pos = wmm_param + 8;
1174 left = wmm_param_len - 8;
1176 memset(¶ms, 0, sizeof(params));
1179 for (; left >= 4; left -= 4, pos += 4) {
1180 int aci = (pos[0] >> 5) & 0x03;
1181 int acm = (pos[0] >> 4) & 0x01;
1189 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1190 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1196 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1197 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1203 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1204 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1211 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1212 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1217 params.aifs = pos[0] & 0x0f;
1218 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1219 params.cw_min = ecw2cw(pos[1] & 0x0f);
1220 params.txop = get_unaligned_le16(pos + 2);
1221 params.uapsd = uapsd;
1224 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1226 params.aifs, params.cw_min, params.cw_max,
1227 params.txop, params.uapsd);
1228 sdata->tx_conf[queue] = params;
1229 if (drv_conf_tx(local, sdata, queue, ¶ms))
1231 "failed to set TX queue parameters for queue %d\n",
1235 /* enable WMM or activate new settings */
1236 sdata->vif.bss_conf.qos = true;
1240 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1242 lockdep_assert_held(&sdata->local->mtx);
1244 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1245 IEEE80211_STA_BEACON_POLL);
1246 ieee80211_run_deferred_scan(sdata->local);
1249 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1251 mutex_lock(&sdata->local->mtx);
1252 __ieee80211_stop_poll(sdata);
1253 mutex_unlock(&sdata->local->mtx);
1256 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1257 u16 capab, bool erp_valid, u8 erp)
1259 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1261 bool use_protection;
1262 bool use_short_preamble;
1263 bool use_short_slot;
1266 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1267 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1269 use_protection = false;
1270 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1273 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1274 if (sdata->local->oper_channel->band == IEEE80211_BAND_5GHZ)
1275 use_short_slot = true;
1277 if (use_protection != bss_conf->use_cts_prot) {
1278 bss_conf->use_cts_prot = use_protection;
1279 changed |= BSS_CHANGED_ERP_CTS_PROT;
1282 if (use_short_preamble != bss_conf->use_short_preamble) {
1283 bss_conf->use_short_preamble = use_short_preamble;
1284 changed |= BSS_CHANGED_ERP_PREAMBLE;
1287 if (use_short_slot != bss_conf->use_short_slot) {
1288 bss_conf->use_short_slot = use_short_slot;
1289 changed |= BSS_CHANGED_ERP_SLOT;
1295 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1296 struct cfg80211_bss *cbss,
1297 u32 bss_info_changed)
1299 struct ieee80211_bss *bss = (void *)cbss->priv;
1300 struct ieee80211_local *local = sdata->local;
1301 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1303 bss_info_changed |= BSS_CHANGED_ASSOC;
1304 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1305 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1307 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1308 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1310 sdata->u.mgd.associated = cbss;
1311 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1313 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1315 /* just to be sure */
1316 ieee80211_stop_poll(sdata);
1318 ieee80211_led_assoc(local, 1);
1320 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1321 bss_conf->dtim_period = bss->dtim_period;
1323 bss_conf->dtim_period = 0;
1325 bss_conf->assoc = 1;
1327 /* Tell the driver to monitor connection quality (if supported) */
1328 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1329 bss_conf->cqm_rssi_thold)
1330 bss_info_changed |= BSS_CHANGED_CQM;
1332 /* Enable ARP filtering */
1333 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1334 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1335 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1338 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1340 mutex_lock(&local->iflist_mtx);
1341 ieee80211_recalc_ps(local, -1);
1342 ieee80211_recalc_smps(local);
1343 mutex_unlock(&local->iflist_mtx);
1345 ieee80211_recalc_ps_vif(sdata);
1347 netif_tx_start_all_queues(sdata->dev);
1348 netif_carrier_on(sdata->dev);
1351 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1352 u16 stype, u16 reason, bool tx,
1355 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1356 struct ieee80211_local *local = sdata->local;
1357 struct sta_info *sta;
1360 ASSERT_MGD_MTX(ifmgd);
1362 if (WARN_ON_ONCE(tx && !frame_buf))
1365 if (WARN_ON(!ifmgd->associated))
1368 ieee80211_stop_poll(sdata);
1370 ifmgd->associated = NULL;
1373 * we need to commit the associated = NULL change because the
1374 * scan code uses that to determine whether this iface should
1375 * go to/wake up from powersave or not -- and could otherwise
1376 * wake the queues erroneously.
1381 * Thus, we can only afterwards stop the queues -- to account
1382 * for the case where another CPU is finishing a scan at this
1383 * time -- we don't want the scan code to enable queues.
1386 netif_tx_stop_all_queues(sdata->dev);
1387 netif_carrier_off(sdata->dev);
1389 mutex_lock(&local->sta_mtx);
1390 sta = sta_info_get(sdata, ifmgd->bssid);
1392 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1393 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1395 mutex_unlock(&local->sta_mtx);
1398 * if we want to get out of ps before disassoc (why?) we have
1399 * to do it before sending disassoc, as otherwise the null-packet
1402 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1403 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1404 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1406 local->ps_sdata = NULL;
1408 /* disable per-vif ps */
1409 ieee80211_recalc_ps_vif(sdata);
1411 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1413 drv_flush(local, false);
1415 /* deauthenticate/disassociate now */
1416 if (tx || frame_buf)
1417 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1418 reason, tx, frame_buf);
1420 /* flush out frame */
1422 drv_flush(local, false);
1424 /* clear bssid only after building the needed mgmt frames */
1425 memset(ifmgd->bssid, 0, ETH_ALEN);
1427 /* remove AP and TDLS peers */
1428 sta_info_flush(local, sdata);
1430 /* finally reset all BSS / config parameters */
1431 changed |= ieee80211_reset_erp_info(sdata);
1433 ieee80211_led_assoc(local, 0);
1434 changed |= BSS_CHANGED_ASSOC;
1435 sdata->vif.bss_conf.assoc = false;
1437 /* on the next assoc, re-program HT parameters */
1438 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1439 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1441 local->power_constr_level = 0;
1443 del_timer_sync(&local->dynamic_ps_timer);
1444 cancel_work_sync(&local->dynamic_ps_enable_work);
1446 /* Disable ARP filtering */
1447 if (sdata->vif.bss_conf.arp_filter_enabled) {
1448 sdata->vif.bss_conf.arp_filter_enabled = false;
1449 changed |= BSS_CHANGED_ARP_FILTER;
1452 sdata->vif.bss_conf.qos = false;
1453 changed |= BSS_CHANGED_QOS;
1455 /* The BSSID (not really interesting) and HT changed */
1456 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1457 ieee80211_bss_info_change_notify(sdata, changed);
1459 /* channel(_type) changes are handled by ieee80211_hw_config */
1460 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1461 ieee80211_hw_config(local, 0);
1463 /* disassociated - set to defaults now */
1464 ieee80211_set_wmm_default(sdata, false);
1466 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1467 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1468 del_timer_sync(&sdata->u.mgd.timer);
1469 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1471 sdata->u.mgd.timers_running = 0;
1474 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1475 struct ieee80211_hdr *hdr)
1478 * We can postpone the mgd.timer whenever receiving unicast frames
1479 * from AP because we know that the connection is working both ways
1480 * at that time. But multicast frames (and hence also beacons) must
1481 * be ignored here, because we need to trigger the timer during
1482 * data idle periods for sending the periodic probe request to the
1483 * AP we're connected to.
1485 if (is_multicast_ether_addr(hdr->addr1))
1488 ieee80211_sta_reset_conn_monitor(sdata);
1491 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1493 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1494 struct ieee80211_local *local = sdata->local;
1496 mutex_lock(&local->mtx);
1497 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1498 IEEE80211_STA_CONNECTION_POLL))) {
1499 mutex_unlock(&local->mtx);
1503 __ieee80211_stop_poll(sdata);
1505 mutex_lock(&local->iflist_mtx);
1506 ieee80211_recalc_ps(local, -1);
1507 mutex_unlock(&local->iflist_mtx);
1509 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1513 * We've received a probe response, but are not sure whether
1514 * we have or will be receiving any beacons or data, so let's
1515 * schedule the timers again, just in case.
1517 ieee80211_sta_reset_beacon_monitor(sdata);
1519 mod_timer(&ifmgd->conn_mon_timer,
1520 round_jiffies_up(jiffies +
1521 IEEE80211_CONNECTION_IDLE_TIME));
1523 mutex_unlock(&local->mtx);
1526 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1527 struct ieee80211_hdr *hdr, bool ack)
1529 if (!ieee80211_is_data(hdr->frame_control))
1533 ieee80211_sta_reset_conn_monitor(sdata);
1535 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1536 sdata->u.mgd.probe_send_count > 0) {
1538 sdata->u.mgd.probe_send_count = 0;
1540 sdata->u.mgd.nullfunc_failed = true;
1541 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1545 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1547 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1549 u8 *dst = ifmgd->associated->bssid;
1550 u8 unicast_limit = max(1, max_probe_tries - 3);
1553 * Try sending broadcast probe requests for the last three
1554 * probe requests after the first ones failed since some
1555 * buggy APs only support broadcast probe requests.
1557 if (ifmgd->probe_send_count >= unicast_limit)
1561 * When the hardware reports an accurate Tx ACK status, it's
1562 * better to send a nullfunc frame instead of a probe request,
1563 * as it will kick us off the AP quickly if we aren't associated
1564 * anymore. The timeout will be reset if the frame is ACKed by
1567 ifmgd->probe_send_count++;
1569 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1570 ifmgd->nullfunc_failed = false;
1571 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1575 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1576 if (WARN_ON_ONCE(ssid == NULL))
1581 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1582 0, (u32) -1, true, false,
1583 ifmgd->associated->channel);
1586 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1587 run_again(ifmgd, ifmgd->probe_timeout);
1588 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1589 drv_flush(sdata->local, false);
1592 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1596 bool already = false;
1598 if (!ieee80211_sdata_running(sdata))
1601 mutex_lock(&ifmgd->mtx);
1603 if (!ifmgd->associated)
1606 mutex_lock(&sdata->local->mtx);
1608 if (sdata->local->tmp_channel || sdata->local->scanning) {
1609 mutex_unlock(&sdata->local->mtx);
1614 mlme_dbg_ratelimited(sdata,
1615 "detected beacon loss from AP - sending probe request\n");
1617 ieee80211_cqm_rssi_notify(&sdata->vif,
1618 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
1621 * The driver/our work has already reported this event or the
1622 * connection monitoring has kicked in and we have already sent
1623 * a probe request. Or maybe the AP died and the driver keeps
1624 * reporting until we disassociate...
1626 * In either case we have to ignore the current call to this
1627 * function (except for setting the correct probe reason bit)
1628 * because otherwise we would reset the timer every time and
1629 * never check whether we received a probe response!
1631 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1632 IEEE80211_STA_CONNECTION_POLL))
1636 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1638 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1640 mutex_unlock(&sdata->local->mtx);
1645 mutex_lock(&sdata->local->iflist_mtx);
1646 ieee80211_recalc_ps(sdata->local, -1);
1647 mutex_unlock(&sdata->local->iflist_mtx);
1649 ifmgd->probe_send_count = 0;
1650 ieee80211_mgd_probe_ap_send(sdata);
1652 mutex_unlock(&ifmgd->mtx);
1655 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1656 struct ieee80211_vif *vif)
1658 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1659 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1660 struct cfg80211_bss *cbss;
1661 struct sk_buff *skb;
1665 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1668 ASSERT_MGD_MTX(ifmgd);
1670 if (ifmgd->associated)
1671 cbss = ifmgd->associated;
1672 else if (ifmgd->auth_data)
1673 cbss = ifmgd->auth_data->bss;
1674 else if (ifmgd->assoc_data)
1675 cbss = ifmgd->assoc_data->bss;
1679 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
1680 if (WARN_ON_ONCE(ssid == NULL))
1685 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
1687 sdata->local->oper_channel,
1693 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1695 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1697 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1698 struct ieee80211_local *local = sdata->local;
1699 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1701 mutex_lock(&ifmgd->mtx);
1702 if (!ifmgd->associated) {
1703 mutex_unlock(&ifmgd->mtx);
1707 sdata_info(sdata, "Connection to AP %pM lost\n",
1708 ifmgd->associated->bssid);
1710 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1711 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1713 mutex_unlock(&ifmgd->mtx);
1716 * must be outside lock due to cfg80211,
1717 * but that's not a problem.
1719 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
1721 mutex_lock(&local->mtx);
1722 ieee80211_recalc_idle(local);
1723 mutex_unlock(&local->mtx);
1726 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1728 struct ieee80211_sub_if_data *sdata =
1729 container_of(work, struct ieee80211_sub_if_data,
1730 u.mgd.beacon_connection_loss_work);
1731 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1732 struct sta_info *sta;
1734 if (ifmgd->associated) {
1736 sta = sta_info_get(sdata, ifmgd->bssid);
1738 sta->beacon_loss_count++;
1742 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1743 __ieee80211_connection_loss(sdata);
1745 ieee80211_mgd_probe_ap(sdata, true);
1748 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1750 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1751 struct ieee80211_hw *hw = &sdata->local->hw;
1753 trace_api_beacon_loss(sdata);
1755 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1756 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1758 EXPORT_SYMBOL(ieee80211_beacon_loss);
1760 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1762 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1763 struct ieee80211_hw *hw = &sdata->local->hw;
1765 trace_api_connection_loss(sdata);
1767 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1768 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1770 EXPORT_SYMBOL(ieee80211_connection_loss);
1773 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1776 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1778 lockdep_assert_held(&sdata->u.mgd.mtx);
1781 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1783 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1784 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1787 cfg80211_put_bss(auth_data->bss);
1789 sdata->u.mgd.auth_data = NULL;
1792 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1793 struct ieee80211_mgmt *mgmt, size_t len)
1795 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1797 struct ieee802_11_elems elems;
1799 pos = mgmt->u.auth.variable;
1800 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1801 if (!elems.challenge)
1803 auth_data->expected_transaction = 4;
1804 drv_mgd_prepare_tx(sdata->local, sdata);
1805 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1806 elems.challenge - 2, elems.challenge_len + 2,
1807 auth_data->bss->bssid, auth_data->bss->bssid,
1808 auth_data->key, auth_data->key_len,
1809 auth_data->key_idx);
1812 static enum rx_mgmt_action __must_check
1813 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1814 struct ieee80211_mgmt *mgmt, size_t len)
1816 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1818 u16 auth_alg, auth_transaction, status_code;
1819 struct sta_info *sta;
1821 lockdep_assert_held(&ifmgd->mtx);
1824 return RX_MGMT_NONE;
1826 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1827 return RX_MGMT_NONE;
1829 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1831 if (!ether_addr_equal(bssid, mgmt->bssid))
1832 return RX_MGMT_NONE;
1834 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1835 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1836 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1838 if (auth_alg != ifmgd->auth_data->algorithm ||
1839 auth_transaction != ifmgd->auth_data->expected_transaction)
1840 return RX_MGMT_NONE;
1842 if (status_code != WLAN_STATUS_SUCCESS) {
1843 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1844 mgmt->sa, status_code);
1845 ieee80211_destroy_auth_data(sdata, false);
1846 return RX_MGMT_CFG80211_RX_AUTH;
1849 switch (ifmgd->auth_data->algorithm) {
1850 case WLAN_AUTH_OPEN:
1851 case WLAN_AUTH_LEAP:
1854 case WLAN_AUTH_SHARED_KEY:
1855 if (ifmgd->auth_data->expected_transaction != 4) {
1856 ieee80211_auth_challenge(sdata, mgmt, len);
1857 /* need another frame */
1858 return RX_MGMT_NONE;
1862 WARN_ONCE(1, "invalid auth alg %d",
1863 ifmgd->auth_data->algorithm);
1864 return RX_MGMT_NONE;
1867 sdata_info(sdata, "authenticated\n");
1868 ifmgd->auth_data->done = true;
1869 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1870 run_again(ifmgd, ifmgd->auth_data->timeout);
1872 /* move station state to auth */
1873 mutex_lock(&sdata->local->sta_mtx);
1874 sta = sta_info_get(sdata, bssid);
1876 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1879 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1880 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
1883 mutex_unlock(&sdata->local->sta_mtx);
1885 return RX_MGMT_CFG80211_RX_AUTH;
1887 mutex_unlock(&sdata->local->sta_mtx);
1888 /* ignore frame -- wait for timeout */
1889 return RX_MGMT_NONE;
1893 static enum rx_mgmt_action __must_check
1894 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1895 struct ieee80211_mgmt *mgmt, size_t len)
1897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1898 const u8 *bssid = NULL;
1901 lockdep_assert_held(&ifmgd->mtx);
1904 return RX_MGMT_NONE;
1906 if (!ifmgd->associated ||
1907 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1908 return RX_MGMT_NONE;
1910 bssid = ifmgd->associated->bssid;
1912 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1914 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1915 bssid, reason_code);
1917 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1919 mutex_lock(&sdata->local->mtx);
1920 ieee80211_recalc_idle(sdata->local);
1921 mutex_unlock(&sdata->local->mtx);
1923 return RX_MGMT_CFG80211_DEAUTH;
1927 static enum rx_mgmt_action __must_check
1928 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1929 struct ieee80211_mgmt *mgmt, size_t len)
1931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1934 lockdep_assert_held(&ifmgd->mtx);
1937 return RX_MGMT_NONE;
1939 if (!ifmgd->associated ||
1940 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1941 return RX_MGMT_NONE;
1943 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1945 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
1946 mgmt->sa, reason_code);
1948 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1950 mutex_lock(&sdata->local->mtx);
1951 ieee80211_recalc_idle(sdata->local);
1952 mutex_unlock(&sdata->local->mtx);
1954 return RX_MGMT_CFG80211_DISASSOC;
1957 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1958 u8 *supp_rates, unsigned int supp_rates_len,
1959 u32 *rates, u32 *basic_rates,
1960 bool *have_higher_than_11mbit,
1961 int *min_rate, int *min_rate_index)
1965 for (i = 0; i < supp_rates_len; i++) {
1966 int rate = (supp_rates[i] & 0x7f) * 5;
1967 bool is_basic = !!(supp_rates[i] & 0x80);
1970 *have_higher_than_11mbit = true;
1973 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1974 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1976 * Note: Even through the membership selector and the basic
1977 * rate flag share the same bit, they are not exactly
1980 if (!!(supp_rates[i] & 0x80) &&
1981 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1984 for (j = 0; j < sband->n_bitrates; j++) {
1985 if (sband->bitrates[j].bitrate == rate) {
1988 *basic_rates |= BIT(j);
1989 if (rate < *min_rate) {
1991 *min_rate_index = j;
1999 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2002 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2004 lockdep_assert_held(&sdata->u.mgd.mtx);
2007 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2009 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2010 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2014 sdata->u.mgd.assoc_data = NULL;
2017 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2018 struct cfg80211_bss *cbss,
2019 struct ieee80211_mgmt *mgmt, size_t len)
2021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2022 struct ieee80211_local *local = sdata->local;
2023 struct ieee80211_supported_band *sband;
2024 struct sta_info *sta;
2026 u16 capab_info, aid;
2027 struct ieee802_11_elems elems;
2028 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2032 /* AssocResp and ReassocResp have identical structure */
2034 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2035 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2037 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2038 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2040 aid &= ~(BIT(15) | BIT(14));
2042 ifmgd->broken_ap = false;
2044 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2045 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2048 ifmgd->broken_ap = true;
2051 pos = mgmt->u.assoc_resp.variable;
2052 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2054 if (!elems.supp_rates) {
2055 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2061 mutex_lock(&sdata->local->sta_mtx);
2063 * station info was already allocated and inserted before
2064 * the association and should be available to us
2066 sta = sta_info_get(sdata, cbss->bssid);
2067 if (WARN_ON(!sta)) {
2068 mutex_unlock(&sdata->local->sta_mtx);
2072 sband = local->hw.wiphy->bands[local->oper_channel->band];
2074 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2075 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2076 elems.ht_cap_elem, &sta->sta.ht_cap);
2078 sta->supports_40mhz =
2079 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2081 rate_control_rate_init(sta);
2083 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2084 set_sta_flag(sta, WLAN_STA_MFP);
2086 if (elems.wmm_param)
2087 set_sta_flag(sta, WLAN_STA_WME);
2089 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2091 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2092 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2093 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2096 "failed to move station %pM to desired state\n",
2098 WARN_ON(__sta_info_destroy(sta));
2099 mutex_unlock(&sdata->local->sta_mtx);
2103 mutex_unlock(&sdata->local->sta_mtx);
2106 * Always handle WMM once after association regardless
2107 * of the first value the AP uses. Setting -1 here has
2108 * that effect because the AP values is an unsigned
2111 ifmgd->wmm_last_param_set = -1;
2113 if (elems.wmm_param)
2114 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2115 elems.wmm_param_len);
2117 ieee80211_set_wmm_default(sdata, false);
2118 changed |= BSS_CHANGED_QOS;
2120 if (elems.ht_operation && elems.wmm_param &&
2121 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2122 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2123 cbss->bssid, false);
2125 /* set AID and assoc capability,
2126 * ieee80211_set_associated() will tell the driver */
2127 bss_conf->aid = aid;
2128 bss_conf->assoc_capability = capab_info;
2129 ieee80211_set_associated(sdata, cbss, changed);
2132 * If we're using 4-addr mode, let the AP know that we're
2133 * doing so, so that it can create the STA VLAN on its side
2135 if (ifmgd->use_4addr)
2136 ieee80211_send_4addr_nullfunc(local, sdata);
2139 * Start timer to probe the connection to the AP now.
2140 * Also start the timer that will detect beacon loss.
2142 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2143 ieee80211_sta_reset_beacon_monitor(sdata);
2148 static enum rx_mgmt_action __must_check
2149 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2150 struct ieee80211_mgmt *mgmt, size_t len,
2151 struct cfg80211_bss **bss)
2153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2154 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2155 u16 capab_info, status_code, aid;
2156 struct ieee802_11_elems elems;
2160 lockdep_assert_held(&ifmgd->mtx);
2163 return RX_MGMT_NONE;
2164 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2165 return RX_MGMT_NONE;
2168 * AssocResp and ReassocResp have identical structure, so process both
2169 * of them in this function.
2173 return RX_MGMT_NONE;
2175 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2176 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2177 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2178 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2181 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2182 reassoc ? "Rea" : "A", mgmt->sa,
2183 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2185 pos = mgmt->u.assoc_resp.variable;
2186 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2188 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2189 elems.timeout_int && elems.timeout_int_len == 5 &&
2190 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2192 tu = get_unaligned_le32(elems.timeout_int + 1);
2193 ms = tu * 1024 / 1000;
2195 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2197 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2198 if (ms > IEEE80211_ASSOC_TIMEOUT)
2199 run_again(ifmgd, assoc_data->timeout);
2200 return RX_MGMT_NONE;
2203 *bss = assoc_data->bss;
2205 if (status_code != WLAN_STATUS_SUCCESS) {
2206 sdata_info(sdata, "%pM denied association (code=%d)\n",
2207 mgmt->sa, status_code);
2208 ieee80211_destroy_assoc_data(sdata, false);
2210 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2211 /* oops -- internal error -- send timeout for now */
2212 ieee80211_destroy_assoc_data(sdata, false);
2213 cfg80211_put_bss(*bss);
2214 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2216 sdata_info(sdata, "associated\n");
2219 * destroy assoc_data afterwards, as otherwise an idle
2220 * recalc after assoc_data is NULL but before associated
2221 * is set can cause the interface to go idle
2223 ieee80211_destroy_assoc_data(sdata, true);
2226 return RX_MGMT_CFG80211_RX_ASSOC;
2228 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2229 struct ieee80211_mgmt *mgmt,
2231 struct ieee80211_rx_status *rx_status,
2232 struct ieee802_11_elems *elems,
2235 struct ieee80211_local *local = sdata->local;
2237 struct ieee80211_bss *bss;
2238 struct ieee80211_channel *channel;
2239 bool need_ps = false;
2241 if (sdata->u.mgd.associated &&
2242 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
2243 bss = (void *)sdata->u.mgd.associated->priv;
2244 /* not previously set so we may need to recalc */
2245 need_ps = !bss->dtim_period;
2248 if (elems->ds_params && elems->ds_params_len == 1)
2249 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2252 freq = rx_status->freq;
2254 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2256 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2259 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2262 ieee80211_rx_bss_put(local, bss);
2264 if (!sdata->u.mgd.associated)
2268 mutex_lock(&local->iflist_mtx);
2269 ieee80211_recalc_ps(local, -1);
2270 mutex_unlock(&local->iflist_mtx);
2273 if (elems->ch_switch_ie &&
2274 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2275 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
2276 bss, rx_status->mactime);
2280 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2281 struct sk_buff *skb)
2283 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2284 struct ieee80211_if_managed *ifmgd;
2285 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2286 size_t baselen, len = skb->len;
2287 struct ieee802_11_elems elems;
2289 ifmgd = &sdata->u.mgd;
2291 ASSERT_MGD_MTX(ifmgd);
2293 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2294 return; /* ignore ProbeResp to foreign address */
2296 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2300 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2303 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2305 if (ifmgd->associated &&
2306 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2307 ieee80211_reset_ap_probe(sdata);
2309 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2310 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2311 /* got probe response, continue with auth */
2312 sdata_info(sdata, "direct probe responded\n");
2313 ifmgd->auth_data->tries = 0;
2314 ifmgd->auth_data->timeout = jiffies;
2315 run_again(ifmgd, ifmgd->auth_data->timeout);
2320 * This is the canonical list of information elements we care about,
2321 * the filter code also gives us all changes to the Microsoft OUI
2322 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2324 * We implement beacon filtering in software since that means we can
2325 * avoid processing the frame here and in cfg80211, and userspace
2326 * will not be able to tell whether the hardware supports it or not.
2328 * XXX: This list needs to be dynamic -- userspace needs to be able to
2329 * add items it requires. It also needs to be able to tell us to
2330 * look out for other vendor IEs.
2332 static const u64 care_about_ies =
2333 (1ULL << WLAN_EID_COUNTRY) |
2334 (1ULL << WLAN_EID_ERP_INFO) |
2335 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2336 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2337 (1ULL << WLAN_EID_HT_CAPABILITY) |
2338 (1ULL << WLAN_EID_HT_OPERATION);
2340 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2341 struct ieee80211_mgmt *mgmt,
2343 struct ieee80211_rx_status *rx_status)
2345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2346 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2348 struct ieee802_11_elems elems;
2349 struct ieee80211_local *local = sdata->local;
2351 bool erp_valid, directed_tim = false;
2356 lockdep_assert_held(&ifmgd->mtx);
2358 /* Process beacon from the current BSS */
2359 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2363 if (rx_status->freq != local->oper_channel->center_freq)
2366 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2367 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2368 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2369 len - baselen, &elems);
2371 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2373 ifmgd->assoc_data->have_beacon = true;
2374 ifmgd->assoc_data->sent_assoc = false;
2375 /* continue assoc process */
2376 ifmgd->assoc_data->timeout = jiffies;
2377 run_again(ifmgd, ifmgd->assoc_data->timeout);
2381 if (!ifmgd->associated ||
2382 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2384 bssid = ifmgd->associated->bssid;
2386 /* Track average RSSI from the Beacon frames of the current AP */
2387 ifmgd->last_beacon_signal = rx_status->signal;
2388 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2389 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2390 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2391 ifmgd->last_cqm_event_signal = 0;
2392 ifmgd->count_beacon_signal = 1;
2393 ifmgd->last_ave_beacon_signal = 0;
2395 ifmgd->ave_beacon_signal =
2396 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2397 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2398 ifmgd->ave_beacon_signal) / 16;
2399 ifmgd->count_beacon_signal++;
2402 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2403 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2404 int sig = ifmgd->ave_beacon_signal;
2405 int last_sig = ifmgd->last_ave_beacon_signal;
2408 * if signal crosses either of the boundaries, invoke callback
2409 * with appropriate parameters
2411 if (sig > ifmgd->rssi_max_thold &&
2412 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2413 ifmgd->last_ave_beacon_signal = sig;
2414 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2415 } else if (sig < ifmgd->rssi_min_thold &&
2416 (last_sig >= ifmgd->rssi_max_thold ||
2418 ifmgd->last_ave_beacon_signal = sig;
2419 drv_rssi_callback(local, RSSI_EVENT_LOW);
2423 if (bss_conf->cqm_rssi_thold &&
2424 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2425 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2426 int sig = ifmgd->ave_beacon_signal / 16;
2427 int last_event = ifmgd->last_cqm_event_signal;
2428 int thold = bss_conf->cqm_rssi_thold;
2429 int hyst = bss_conf->cqm_rssi_hyst;
2431 (last_event == 0 || sig < last_event - hyst)) {
2432 ifmgd->last_cqm_event_signal = sig;
2433 ieee80211_cqm_rssi_notify(
2435 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2437 } else if (sig > thold &&
2438 (last_event == 0 || sig > last_event + hyst)) {
2439 ifmgd->last_cqm_event_signal = sig;
2440 ieee80211_cqm_rssi_notify(
2442 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2447 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2448 mlme_dbg_ratelimited(sdata,
2449 "cancelling probereq poll due to a received beacon\n");
2450 mutex_lock(&local->mtx);
2451 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2452 ieee80211_run_deferred_scan(local);
2453 mutex_unlock(&local->mtx);
2455 mutex_lock(&local->iflist_mtx);
2456 ieee80211_recalc_ps(local, -1);
2457 mutex_unlock(&local->iflist_mtx);
2461 * Push the beacon loss detection into the future since
2462 * we are processing a beacon from the AP just now.
2464 ieee80211_sta_reset_beacon_monitor(sdata);
2466 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2467 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2468 len - baselen, &elems,
2469 care_about_ies, ncrc);
2471 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2472 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2475 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2477 if (local->hw.conf.dynamic_ps_timeout > 0) {
2478 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2479 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2480 ieee80211_hw_config(local,
2481 IEEE80211_CONF_CHANGE_PS);
2483 ieee80211_send_nullfunc(local, sdata, 0);
2484 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2485 local->pspolling = true;
2488 * Here is assumed that the driver will be
2489 * able to send ps-poll frame and receive a
2490 * response even though power save mode is
2491 * enabled, but some drivers might require
2492 * to disable power save here. This needs
2493 * to be investigated.
2495 ieee80211_send_pspoll(local, sdata);
2500 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2502 ifmgd->beacon_crc = ncrc;
2503 ifmgd->beacon_crc_valid = true;
2505 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2508 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2509 elems.wmm_param_len))
2510 changed |= BSS_CHANGED_QOS;
2512 if (elems.erp_info && elems.erp_info_len >= 1) {
2514 erp_value = elems.erp_info[0];
2518 changed |= ieee80211_handle_bss_capability(sdata,
2519 le16_to_cpu(mgmt->u.beacon.capab_info),
2520 erp_valid, erp_value);
2523 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
2524 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
2525 struct ieee80211_supported_band *sband;
2527 sband = local->hw.wiphy->bands[local->oper_channel->band];
2529 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2533 /* Note: country IE parsing is done for us by cfg80211 */
2534 if (elems.country_elem) {
2535 /* TODO: IBSS also needs this */
2536 if (elems.pwr_constr_elem)
2537 ieee80211_handle_pwr_constr(sdata,
2538 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2539 elems.pwr_constr_elem,
2540 elems.pwr_constr_elem_len);
2543 ieee80211_bss_info_change_notify(sdata, changed);
2546 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2547 struct sk_buff *skb)
2549 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2550 struct ieee80211_rx_status *rx_status;
2551 struct ieee80211_mgmt *mgmt;
2552 struct cfg80211_bss *bss = NULL;
2553 enum rx_mgmt_action rma = RX_MGMT_NONE;
2556 rx_status = (struct ieee80211_rx_status *) skb->cb;
2557 mgmt = (struct ieee80211_mgmt *) skb->data;
2558 fc = le16_to_cpu(mgmt->frame_control);
2560 mutex_lock(&ifmgd->mtx);
2562 switch (fc & IEEE80211_FCTL_STYPE) {
2563 case IEEE80211_STYPE_BEACON:
2564 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2566 case IEEE80211_STYPE_PROBE_RESP:
2567 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2569 case IEEE80211_STYPE_AUTH:
2570 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2572 case IEEE80211_STYPE_DEAUTH:
2573 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2575 case IEEE80211_STYPE_DISASSOC:
2576 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2578 case IEEE80211_STYPE_ASSOC_RESP:
2579 case IEEE80211_STYPE_REASSOC_RESP:
2580 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2582 case IEEE80211_STYPE_ACTION:
2583 switch (mgmt->u.action.category) {
2584 case WLAN_CATEGORY_SPECTRUM_MGMT:
2585 ieee80211_sta_process_chanswitch(sdata,
2586 &mgmt->u.action.u.chan_switch.sw_elem,
2587 (void *)ifmgd->associated->priv,
2588 rx_status->mactime);
2592 mutex_unlock(&ifmgd->mtx);
2598 case RX_MGMT_CFG80211_DEAUTH:
2599 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2601 case RX_MGMT_CFG80211_DISASSOC:
2602 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2604 case RX_MGMT_CFG80211_RX_AUTH:
2605 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2607 case RX_MGMT_CFG80211_RX_ASSOC:
2608 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2610 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2611 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2614 WARN(1, "unexpected: %d", rma);
2618 static void ieee80211_sta_timer(unsigned long data)
2620 struct ieee80211_sub_if_data *sdata =
2621 (struct ieee80211_sub_if_data *) data;
2622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2623 struct ieee80211_local *local = sdata->local;
2625 if (local->quiescing) {
2626 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2630 ieee80211_queue_work(&local->hw, &sdata->work);
2633 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2634 u8 *bssid, u8 reason)
2636 struct ieee80211_local *local = sdata->local;
2637 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2638 u8 frame_buf[DEAUTH_DISASSOC_LEN];
2640 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2642 mutex_unlock(&ifmgd->mtx);
2645 * must be outside lock due to cfg80211,
2646 * but that's not a problem.
2648 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
2650 mutex_lock(&local->mtx);
2651 ieee80211_recalc_idle(local);
2652 mutex_unlock(&local->mtx);
2654 mutex_lock(&ifmgd->mtx);
2657 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2659 struct ieee80211_local *local = sdata->local;
2660 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2661 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2663 lockdep_assert_held(&ifmgd->mtx);
2665 if (WARN_ON_ONCE(!auth_data))
2670 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2671 sdata_info(sdata, "authentication with %pM timed out\n",
2672 auth_data->bss->bssid);
2675 * Most likely AP is not in the range so remove the
2676 * bss struct for that AP.
2678 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2683 drv_mgd_prepare_tx(local, sdata);
2685 if (auth_data->bss->proberesp_ies) {
2686 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2687 auth_data->bss->bssid, auth_data->tries,
2688 IEEE80211_AUTH_MAX_TRIES);
2690 auth_data->expected_transaction = 2;
2691 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2692 auth_data->ie, auth_data->ie_len,
2693 auth_data->bss->bssid,
2694 auth_data->bss->bssid, NULL, 0, 0);
2698 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2699 auth_data->bss->bssid, auth_data->tries,
2700 IEEE80211_AUTH_MAX_TRIES);
2702 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2706 * Direct probe is sent to broadcast address as some APs
2707 * will not answer to direct packet in unassociated state.
2709 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2710 NULL, 0, (u32) -1, true, false,
2711 auth_data->bss->channel);
2714 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2715 run_again(ifmgd, auth_data->timeout);
2720 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2722 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2723 struct ieee80211_local *local = sdata->local;
2725 lockdep_assert_held(&sdata->u.mgd.mtx);
2727 assoc_data->tries++;
2728 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2729 sdata_info(sdata, "association with %pM timed out\n",
2730 assoc_data->bss->bssid);
2733 * Most likely AP is not in the range so remove the
2734 * bss struct for that AP.
2736 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2741 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2742 assoc_data->bss->bssid, assoc_data->tries,
2743 IEEE80211_ASSOC_MAX_TRIES);
2744 ieee80211_send_assoc(sdata);
2746 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2747 run_again(&sdata->u.mgd, assoc_data->timeout);
2752 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2754 struct ieee80211_local *local = sdata->local;
2755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2757 mutex_lock(&ifmgd->mtx);
2759 if (ifmgd->auth_data &&
2760 time_after(jiffies, ifmgd->auth_data->timeout)) {
2761 if (ifmgd->auth_data->done) {
2763 * ok ... we waited for assoc but userspace didn't,
2764 * so let's just kill the auth data
2766 ieee80211_destroy_auth_data(sdata, false);
2767 } else if (ieee80211_probe_auth(sdata)) {
2770 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2772 ieee80211_destroy_auth_data(sdata, false);
2774 mutex_unlock(&ifmgd->mtx);
2775 cfg80211_send_auth_timeout(sdata->dev, bssid);
2776 mutex_lock(&ifmgd->mtx);
2778 } else if (ifmgd->auth_data)
2779 run_again(ifmgd, ifmgd->auth_data->timeout);
2781 if (ifmgd->assoc_data &&
2782 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2783 if (!ifmgd->assoc_data->have_beacon ||
2784 ieee80211_do_assoc(sdata)) {
2787 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2789 ieee80211_destroy_assoc_data(sdata, false);
2791 mutex_unlock(&ifmgd->mtx);
2792 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2793 mutex_lock(&ifmgd->mtx);
2795 } else if (ifmgd->assoc_data)
2796 run_again(ifmgd, ifmgd->assoc_data->timeout);
2798 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2799 IEEE80211_STA_CONNECTION_POLL) &&
2800 ifmgd->associated) {
2804 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2806 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2807 max_tries = max_nullfunc_tries;
2809 max_tries = max_probe_tries;
2811 /* ACK received for nullfunc probing frame */
2812 if (!ifmgd->probe_send_count)
2813 ieee80211_reset_ap_probe(sdata);
2814 else if (ifmgd->nullfunc_failed) {
2815 if (ifmgd->probe_send_count < max_tries) {
2817 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2818 bssid, ifmgd->probe_send_count,
2820 ieee80211_mgd_probe_ap_send(sdata);
2823 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2825 ieee80211_sta_connection_lost(sdata, bssid,
2826 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2828 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2829 run_again(ifmgd, ifmgd->probe_timeout);
2830 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2832 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2833 bssid, probe_wait_ms);
2834 ieee80211_sta_connection_lost(sdata, bssid,
2835 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2836 } else if (ifmgd->probe_send_count < max_tries) {
2838 "No probe response from AP %pM after %dms, try %d/%i\n",
2839 bssid, probe_wait_ms,
2840 ifmgd->probe_send_count, max_tries);
2841 ieee80211_mgd_probe_ap_send(sdata);
2844 * We actually lost the connection ... or did we?
2847 wiphy_debug(local->hw.wiphy,
2848 "%s: No probe response from AP %pM"
2849 " after %dms, disconnecting.\n",
2851 bssid, probe_wait_ms);
2853 ieee80211_sta_connection_lost(sdata, bssid,
2854 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2858 mutex_unlock(&ifmgd->mtx);
2860 mutex_lock(&local->mtx);
2861 ieee80211_recalc_idle(local);
2862 mutex_unlock(&local->mtx);
2865 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2867 struct ieee80211_sub_if_data *sdata =
2868 (struct ieee80211_sub_if_data *) data;
2869 struct ieee80211_local *local = sdata->local;
2871 if (local->quiescing)
2874 ieee80211_queue_work(&sdata->local->hw,
2875 &sdata->u.mgd.beacon_connection_loss_work);
2878 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2880 struct ieee80211_sub_if_data *sdata =
2881 (struct ieee80211_sub_if_data *) data;
2882 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2883 struct ieee80211_local *local = sdata->local;
2885 if (local->quiescing)
2888 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2891 static void ieee80211_sta_monitor_work(struct work_struct *work)
2893 struct ieee80211_sub_if_data *sdata =
2894 container_of(work, struct ieee80211_sub_if_data,
2895 u.mgd.monitor_work);
2897 ieee80211_mgd_probe_ap(sdata, false);
2900 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2904 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2905 __ieee80211_stop_poll(sdata);
2907 /* let's probe the connection once */
2908 flags = sdata->local->hw.flags;
2909 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2910 ieee80211_queue_work(&sdata->local->hw,
2911 &sdata->u.mgd.monitor_work);
2912 /* and do all the other regular work too */
2913 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2918 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2920 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2923 * we need to use atomic bitops for the running bits
2924 * only because both timers might fire at the same
2925 * time -- the code here is properly synchronised.
2928 cancel_work_sync(&ifmgd->request_smps_work);
2930 cancel_work_sync(&ifmgd->monitor_work);
2931 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
2932 if (del_timer_sync(&ifmgd->timer))
2933 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2935 cancel_work_sync(&ifmgd->chswitch_work);
2936 if (del_timer_sync(&ifmgd->chswitch_timer))
2937 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2939 /* these will just be re-established on connection */
2940 del_timer_sync(&ifmgd->conn_mon_timer);
2941 del_timer_sync(&ifmgd->bcn_mon_timer);
2944 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2948 if (!ifmgd->associated)
2951 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2952 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2953 mutex_lock(&ifmgd->mtx);
2954 if (ifmgd->associated) {
2956 "driver requested disconnect after resume\n");
2957 ieee80211_sta_connection_lost(sdata,
2958 ifmgd->associated->bssid,
2959 WLAN_REASON_UNSPECIFIED);
2960 mutex_unlock(&ifmgd->mtx);
2963 mutex_unlock(&ifmgd->mtx);
2966 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2967 add_timer(&ifmgd->timer);
2968 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2969 add_timer(&ifmgd->chswitch_timer);
2970 ieee80211_sta_reset_beacon_monitor(sdata);
2972 mutex_lock(&sdata->local->mtx);
2973 ieee80211_restart_sta_timer(sdata);
2974 mutex_unlock(&sdata->local->mtx);
2978 /* interface setup */
2979 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2981 struct ieee80211_if_managed *ifmgd;
2983 ifmgd = &sdata->u.mgd;
2984 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2985 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2986 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2987 ieee80211_beacon_connection_loss_work);
2988 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
2989 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2990 (unsigned long) sdata);
2991 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2992 (unsigned long) sdata);
2993 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2994 (unsigned long) sdata);
2995 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2996 (unsigned long) sdata);
2999 ifmgd->powersave = sdata->wdev.ps;
3000 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3001 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
3003 mutex_init(&ifmgd->mtx);
3005 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3006 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3008 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3011 /* scan finished notification */
3012 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3014 struct ieee80211_sub_if_data *sdata;
3016 /* Restart STA timers */
3018 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3019 ieee80211_restart_sta_timer(sdata);
3023 int ieee80211_max_network_latency(struct notifier_block *nb,
3024 unsigned long data, void *dummy)
3026 s32 latency_usec = (s32) data;
3027 struct ieee80211_local *local =
3028 container_of(nb, struct ieee80211_local,
3029 network_latency_notifier);
3031 mutex_lock(&local->iflist_mtx);
3032 ieee80211_recalc_ps(local, latency_usec);
3033 mutex_unlock(&local->iflist_mtx);
3038 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3039 struct cfg80211_bss *cbss)
3041 struct ieee80211_local *local = sdata->local;
3042 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3044 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3045 const u8 *ht_oper_ie;
3046 const struct ieee80211_ht_operation *ht_oper = NULL;
3047 struct ieee80211_supported_band *sband;
3049 sband = local->hw.wiphy->bands[cbss->channel->band];
3051 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3053 if (sband->ht_cap.ht_supported) {
3054 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3055 cbss->information_elements,
3056 cbss->len_information_elements);
3057 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3058 ht_oper = (void *)(ht_oper_ie + 2);
3062 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3063 cbss->channel->band);
3064 /* check that channel matches the right operating channel */
3065 if (cbss->channel->center_freq != ht_cfreq) {
3067 * It's possible that some APs are confused here;
3068 * Netgear WNDR3700 sometimes reports 4 higher than
3069 * the actual channel in association responses, but
3070 * since we look at probe response/beacon data here
3074 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3075 cbss->channel->center_freq,
3076 ht_cfreq, ht_oper->primary_chan,
3077 cbss->channel->band);
3083 channel_type = NL80211_CHAN_HT20;
3085 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3086 switch (ht_oper->ht_param &
3087 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3088 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3089 channel_type = NL80211_CHAN_HT40PLUS;
3091 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3092 channel_type = NL80211_CHAN_HT40MINUS;
3098 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3099 /* can only fail due to HT40+/- mismatch */
3100 channel_type = NL80211_CHAN_HT20;
3102 "disabling 40 MHz due to multi-vif mismatch\n");
3103 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3104 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3108 local->oper_channel = cbss->channel;
3109 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3114 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3115 struct cfg80211_bss *cbss, bool assoc)
3117 struct ieee80211_local *local = sdata->local;
3118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3119 struct ieee80211_bss *bss = (void *)cbss->priv;
3120 struct sta_info *new_sta = NULL;
3121 bool have_sta = false;
3124 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3129 have_sta = sta_info_get(sdata, cbss->bssid);
3134 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3139 mutex_lock(&local->mtx);
3140 ieee80211_recalc_idle(sdata->local);
3141 mutex_unlock(&local->mtx);
3144 u32 rates = 0, basic_rates = 0;
3145 bool have_higher_than_11mbit;
3146 int min_rate = INT_MAX, min_rate_index = -1;
3147 struct ieee80211_supported_band *sband;
3149 sband = local->hw.wiphy->bands[cbss->channel->band];
3151 err = ieee80211_prep_channel(sdata, cbss);
3153 sta_info_free(local, new_sta);
3157 ieee80211_get_rates(sband, bss->supp_rates,
3158 bss->supp_rates_len,
3159 &rates, &basic_rates,
3160 &have_higher_than_11mbit,
3161 &min_rate, &min_rate_index);
3164 * This used to be a workaround for basic rates missing
3165 * in the association response frame. Now that we no
3166 * longer use the basic rates from there, it probably
3167 * doesn't happen any more, but keep the workaround so
3168 * in case some *other* APs are buggy in different ways
3169 * we can connect -- with a warning.
3171 if (!basic_rates && min_rate_index >= 0) {
3173 "No basic rates, using min rate instead\n");
3174 basic_rates = BIT(min_rate_index);
3177 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3178 sdata->vif.bss_conf.basic_rates = basic_rates;
3180 /* cf. IEEE 802.11 9.2.12 */
3181 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3182 have_higher_than_11mbit)
3183 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3185 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3187 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3189 /* set timing information */
3190 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3191 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3192 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3194 /* tell driver about BSSID, basic rates and timing */
3195 ieee80211_bss_info_change_notify(sdata,
3196 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3197 BSS_CHANGED_BEACON_INT);
3200 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3202 err = sta_info_insert(new_sta);
3206 "failed to insert STA entry for the AP (error %d)\n",
3211 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3217 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3218 struct cfg80211_auth_request *req)
3220 struct ieee80211_local *local = sdata->local;
3221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3222 struct ieee80211_mgd_auth_data *auth_data;
3226 /* prepare auth data structure */
3228 switch (req->auth_type) {
3229 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3230 auth_alg = WLAN_AUTH_OPEN;
3232 case NL80211_AUTHTYPE_SHARED_KEY:
3233 if (IS_ERR(local->wep_tx_tfm))
3235 auth_alg = WLAN_AUTH_SHARED_KEY;
3237 case NL80211_AUTHTYPE_FT:
3238 auth_alg = WLAN_AUTH_FT;
3240 case NL80211_AUTHTYPE_NETWORK_EAP:
3241 auth_alg = WLAN_AUTH_LEAP;
3247 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3251 auth_data->bss = req->bss;
3253 if (req->ie && req->ie_len) {
3254 memcpy(auth_data->ie, req->ie, req->ie_len);
3255 auth_data->ie_len = req->ie_len;
3258 if (req->key && req->key_len) {
3259 auth_data->key_len = req->key_len;
3260 auth_data->key_idx = req->key_idx;
3261 memcpy(auth_data->key, req->key, req->key_len);
3264 auth_data->algorithm = auth_alg;
3266 /* try to authenticate/probe */
3268 mutex_lock(&ifmgd->mtx);
3270 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3271 ifmgd->assoc_data) {
3276 if (ifmgd->auth_data)
3277 ieee80211_destroy_auth_data(sdata, false);
3279 /* prep auth_data so we don't go into idle on disassoc */
3280 ifmgd->auth_data = auth_data;
3282 if (ifmgd->associated)
3283 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3285 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
3287 err = ieee80211_prep_connection(sdata, req->bss, false);
3291 err = ieee80211_probe_auth(sdata);
3293 sta_info_destroy_addr(sdata, req->bss->bssid);
3297 /* hold our own reference */
3298 cfg80211_ref_bss(auth_data->bss);
3303 memset(ifmgd->bssid, 0, ETH_ALEN);
3304 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3305 ifmgd->auth_data = NULL;
3309 mutex_unlock(&ifmgd->mtx);
3314 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3315 struct cfg80211_assoc_request *req)
3317 struct ieee80211_local *local = sdata->local;
3318 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3319 struct ieee80211_bss *bss = (void *)req->bss->priv;
3320 struct ieee80211_mgd_assoc_data *assoc_data;
3321 struct ieee80211_supported_band *sband;
3322 const u8 *ssidie, *ht_ie;
3325 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3329 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3333 mutex_lock(&ifmgd->mtx);
3335 if (ifmgd->associated)
3336 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3338 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3343 if (ifmgd->assoc_data) {
3348 if (ifmgd->auth_data) {
3351 /* keep sta info, bssid if matching */
3352 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3353 ieee80211_destroy_auth_data(sdata, match);
3356 /* prepare assoc data */
3359 * keep only the 40 MHz disable bit set as it might have
3360 * been set during authentication already, all other bits
3361 * should be reset for a new connection
3363 ifmgd->flags &= IEEE80211_STA_DISABLE_40MHZ;
3365 ifmgd->beacon_crc_valid = false;
3368 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3369 * We still associate in non-HT mode (11a/b/g) if any one of these
3370 * ciphers is configured as pairwise.
3371 * We can set this to true for non-11n hardware, that'll be checked
3372 * separately along with the peer capabilities.
3374 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
3375 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3376 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3377 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
3378 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3379 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3380 netdev_info(sdata->dev,
3381 "disabling HT/VHT due to WEP/TKIP use\n");
3385 if (req->flags & ASSOC_REQ_DISABLE_HT) {
3386 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3387 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3390 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3391 sband = local->hw.wiphy->bands[req->bss->channel->band];
3392 if (!sband->ht_cap.ht_supported ||
3393 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3394 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3396 netdev_info(sdata->dev,
3397 "disabling HT as WMM/QoS is not supported by the AP\n");
3400 /* disable VHT if we don't support it or the AP doesn't use WMM */
3401 if (!sband->vht_cap.vht_supported ||
3402 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3403 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3405 netdev_info(sdata->dev,
3406 "disabling VHT as WMM/QoS is not supported by the AP\n");
3409 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3410 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3411 sizeof(ifmgd->ht_capa_mask));
3413 if (req->ie && req->ie_len) {
3414 memcpy(assoc_data->ie, req->ie, req->ie_len);
3415 assoc_data->ie_len = req->ie_len;
3418 assoc_data->bss = req->bss;
3420 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3421 if (ifmgd->powersave)
3422 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3424 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3426 ifmgd->ap_smps = ifmgd->req_smps;
3428 assoc_data->capability = req->bss->capability;
3429 assoc_data->wmm = bss->wmm_used &&
3430 (local->hw.queues >= IEEE80211_NUM_ACS);
3431 assoc_data->supp_rates = bss->supp_rates;
3432 assoc_data->supp_rates_len = bss->supp_rates_len;
3434 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3435 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3436 assoc_data->ap_ht_param =
3437 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3439 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3441 if (bss->wmm_used && bss->uapsd_supported &&
3442 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3443 assoc_data->uapsd = true;
3444 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3446 assoc_data->uapsd = false;
3447 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3450 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3451 assoc_data->ssid_len = ssidie[1];
3453 if (req->prev_bssid)
3454 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3457 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3458 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3460 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3461 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3464 if (req->crypto.control_port)
3465 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3467 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3469 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3470 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3472 /* kick off associate process */
3474 ifmgd->assoc_data = assoc_data;
3476 err = ieee80211_prep_connection(sdata, req->bss, true);
3480 if (!bss->dtim_period &&
3481 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3483 * Wait up to one beacon interval ...
3484 * should this be more if we miss one?
3486 sdata_info(sdata, "waiting for beacon from %pM\n",
3488 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
3490 assoc_data->have_beacon = true;
3491 assoc_data->sent_assoc = false;
3492 assoc_data->timeout = jiffies;
3494 run_again(ifmgd, assoc_data->timeout);
3496 if (bss->corrupt_data) {
3497 char *corrupt_type = "data";
3498 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3499 if (bss->corrupt_data &
3500 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3501 corrupt_type = "beacon and probe response";
3503 corrupt_type = "beacon";
3504 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3505 corrupt_type = "probe response";
3506 sdata_info(sdata, "associating with AP with corrupt %s\n",
3513 memset(ifmgd->bssid, 0, ETH_ALEN);
3514 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3515 ifmgd->assoc_data = NULL;
3519 mutex_unlock(&ifmgd->mtx);
3524 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
3525 struct cfg80211_deauth_request *req)
3527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3528 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3530 mutex_lock(&ifmgd->mtx);
3532 if (ifmgd->auth_data) {
3533 ieee80211_destroy_auth_data(sdata, false);
3534 mutex_unlock(&ifmgd->mtx);
3539 "deauthenticating from %pM by local choice (reason=%d)\n",
3540 req->bssid, req->reason_code);
3542 if (ifmgd->associated &&
3543 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
3544 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3545 req->reason_code, true, frame_buf);
3547 drv_mgd_prepare_tx(sdata->local, sdata);
3548 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3549 IEEE80211_STYPE_DEAUTH,
3550 req->reason_code, true,
3554 mutex_unlock(&ifmgd->mtx);
3556 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3558 mutex_lock(&sdata->local->mtx);
3559 ieee80211_recalc_idle(sdata->local);
3560 mutex_unlock(&sdata->local->mtx);
3565 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
3566 struct cfg80211_disassoc_request *req)
3568 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3570 u8 frame_buf[DEAUTH_DISASSOC_LEN];
3572 mutex_lock(&ifmgd->mtx);
3575 * cfg80211 should catch this ... but it's racy since
3576 * we can receive a disassoc frame, process it, hand it
3577 * to cfg80211 while that's in a locked section already
3578 * trying to tell us that the user wants to disconnect.
3580 if (ifmgd->associated != req->bss) {
3581 mutex_unlock(&ifmgd->mtx);
3586 "disassociating from %pM by local choice (reason=%d)\n",
3587 req->bss->bssid, req->reason_code);
3589 memcpy(bssid, req->bss->bssid, ETH_ALEN);
3590 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3591 req->reason_code, !req->local_state_change,
3593 mutex_unlock(&ifmgd->mtx);
3595 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3597 mutex_lock(&sdata->local->mtx);
3598 ieee80211_recalc_idle(sdata->local);
3599 mutex_unlock(&sdata->local->mtx);
3604 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
3606 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3608 mutex_lock(&ifmgd->mtx);
3609 if (ifmgd->assoc_data)
3610 ieee80211_destroy_assoc_data(sdata, false);
3611 if (ifmgd->auth_data)
3612 ieee80211_destroy_auth_data(sdata, false);
3613 del_timer_sync(&ifmgd->timer);
3614 mutex_unlock(&ifmgd->mtx);
3617 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3618 enum nl80211_cqm_rssi_threshold_event rssi_event,
3621 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3623 trace_api_cqm_rssi_notify(sdata, rssi_event);
3625 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3627 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);