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_TIMEOUT_SHORT (HZ / 10)
35 #define IEEE80211_AUTH_MAX_TRIES 3
36 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39 #define IEEE80211_ASSOC_MAX_TRIES 3
41 static int max_nullfunc_tries = 2;
42 module_param(max_nullfunc_tries, int, 0644);
43 MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
46 static int max_probe_tries = 5;
47 module_param(max_probe_tries, int, 0644);
48 MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
59 #define IEEE80211_BEACON_LOSS_COUNT 7
62 * Time the connection can be idle before we probe
63 * it to see if we can still talk to the AP.
65 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
67 * Time we wait for a probe response after sending
68 * a probe request because of beacon loss or for
69 * checking the connection still works.
71 static int probe_wait_ms = 500;
72 module_param(probe_wait_ms, int, 0644);
73 MODULE_PARM_DESC(probe_wait_ms,
74 "Maximum time(ms) to wait for probe response"
75 " before disconnecting (reason 4).");
78 * Weight given to the latest Beacon frame when calculating average signal
79 * strength for Beacon frames received in the current BSS. This must be
82 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
90 #define TMR_RUNNING_TIMER 0
91 #define TMR_RUNNING_CHANSW 1
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 ieee80211_chanctx_conf *chanctx_conf;
184 struct ieee80211_channel *chan;
185 struct sta_info *sta;
188 bool disable_40 = false;
191 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
192 if (WARN_ON(!chanctx_conf)) {
196 chan = chanctx_conf->def.chan;
198 sband = local->hw.wiphy->bands[chan->band];
200 switch (sdata->vif.bss_conf.chandef.width) {
201 case NL80211_CHAN_WIDTH_40:
202 if (sdata->vif.bss_conf.chandef.chan->center_freq >
203 sdata->vif.bss_conf.chandef.center_freq1 &&
204 chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
206 if (sdata->vif.bss_conf.chandef.chan->center_freq <
207 sdata->vif.bss_conf.chandef.center_freq1 &&
208 chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
215 /* This can change during the lifetime of the BSS */
216 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
219 mutex_lock(&local->sta_mtx);
220 sta = sta_info_get(sdata, bssid);
224 if (sta && !sta->supports_40mhz)
227 if (sta && (!reconfig ||
228 (disable_40 != !(sta->sta.ht_cap.cap &
229 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
232 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
234 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
236 rate_control_rate_update(local, sband, sta,
237 IEEE80211_RC_BW_CHANGED);
239 mutex_unlock(&local->sta_mtx);
241 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
243 /* if bss configuration changed store the new one */
244 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
245 changed |= BSS_CHANGED_HT;
246 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
252 /* frame sending functions */
254 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
255 struct ieee80211_supported_band *sband,
261 for (i = 0; i < supp_rates_len; i++) {
262 int rate = (supp_rates[i] & 0x7F) * 5;
264 for (j = 0; j < sband->n_bitrates; j++)
265 if (sband->bitrates[j].bitrate == rate) {
275 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
276 struct sk_buff *skb, u8 ap_ht_param,
277 struct ieee80211_supported_band *sband,
278 struct ieee80211_channel *channel,
279 enum ieee80211_smps_mode smps)
282 u32 flags = channel->flags;
284 struct ieee80211_sta_ht_cap ht_cap;
286 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
288 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
289 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
291 /* determine capability flags */
294 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
295 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
296 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
297 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
298 cap &= ~IEEE80211_HT_CAP_SGI_40;
301 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
302 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
303 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
304 cap &= ~IEEE80211_HT_CAP_SGI_40;
310 * If 40 MHz was disabled associate as though we weren't
311 * capable of 40 MHz -- some broken APs will never fall
312 * back to trying to transmit in 20 MHz.
314 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
315 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
316 cap &= ~IEEE80211_HT_CAP_SGI_40;
319 /* set SM PS mode properly */
320 cap &= ~IEEE80211_HT_CAP_SM_PS;
322 case IEEE80211_SMPS_AUTOMATIC:
323 case IEEE80211_SMPS_NUM_MODES:
325 case IEEE80211_SMPS_OFF:
326 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
327 IEEE80211_HT_CAP_SM_PS_SHIFT;
329 case IEEE80211_SMPS_STATIC:
330 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
331 IEEE80211_HT_CAP_SM_PS_SHIFT;
333 case IEEE80211_SMPS_DYNAMIC:
334 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
335 IEEE80211_HT_CAP_SM_PS_SHIFT;
339 /* reserve and fill IE */
340 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
341 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
344 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
346 struct ieee80211_supported_band *sband,
347 struct ieee80211_vht_cap *ap_vht_cap)
351 struct ieee80211_sta_vht_cap vht_cap;
354 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
356 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
358 /* determine capability flags */
361 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
362 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
363 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
366 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
367 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
368 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
372 * Some APs apparently get confused if our capabilities are better
373 * than theirs, so restrict what we advertise in the assoc request.
375 if (!(ap_vht_cap->vht_cap_info &
376 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
377 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
379 if (!(ap_vht_cap->vht_cap_info &
380 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
381 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
382 IEEE80211_VHT_CAP_RXSTBC_3 |
383 IEEE80211_VHT_CAP_RXSTBC_4);
385 for (i = 0; i < 8; i++) {
387 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
390 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
392 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
397 if (our_mcs <= ap_mcs)
400 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
401 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
402 vht_cap.vht_mcs.rx_mcs_map |=
403 cpu_to_le16(ap_mcs << shift);
407 /* reserve and fill IE */
408 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
409 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
412 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
414 struct ieee80211_local *local = sdata->local;
415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
416 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
418 struct ieee80211_mgmt *mgmt;
420 size_t offset = 0, noffset;
421 int i, count, rates_len, supp_rates_len;
423 struct ieee80211_supported_band *sband;
424 struct ieee80211_chanctx_conf *chanctx_conf;
425 struct ieee80211_channel *chan;
428 lockdep_assert_held(&ifmgd->mtx);
431 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
432 if (WARN_ON(!chanctx_conf)) {
436 chan = chanctx_conf->def.chan;
438 sband = local->hw.wiphy->bands[chan->band];
440 if (assoc_data->supp_rates_len) {
442 * Get all rates supported by the device and the AP as
443 * some APs don't like getting a superset of their rates
444 * in the association request (e.g. D-Link DAP 1353 in
447 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
448 assoc_data->supp_rates_len,
452 * In case AP not provide any supported rates information
453 * before association, we send information element(s) with
454 * all rates that we support.
457 rates_len = sband->n_bitrates;
460 skb = alloc_skb(local->hw.extra_tx_headroom +
461 sizeof(*mgmt) + /* bit too much but doesn't matter */
462 2 + assoc_data->ssid_len + /* SSID */
463 4 + rates_len + /* (extended) rates */
464 4 + /* power capability */
465 2 + 2 * sband->n_channels + /* supported channels */
466 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
467 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
468 assoc_data->ie_len + /* extra IEs */
474 skb_reserve(skb, local->hw.extra_tx_headroom);
476 capab = WLAN_CAPABILITY_ESS;
478 if (sband->band == IEEE80211_BAND_2GHZ) {
479 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
480 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
481 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
482 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
485 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
486 capab |= WLAN_CAPABILITY_PRIVACY;
488 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
489 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
490 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
492 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
494 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
495 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
496 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
498 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
500 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
501 IEEE80211_STYPE_REASSOC_REQ);
502 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
503 mgmt->u.reassoc_req.listen_interval =
504 cpu_to_le16(local->hw.conf.listen_interval);
505 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
509 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
510 IEEE80211_STYPE_ASSOC_REQ);
511 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
512 mgmt->u.assoc_req.listen_interval =
513 cpu_to_le16(local->hw.conf.listen_interval);
517 pos = skb_put(skb, 2 + assoc_data->ssid_len);
518 *pos++ = WLAN_EID_SSID;
519 *pos++ = assoc_data->ssid_len;
520 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
522 /* add all rates which were marked to be used above */
523 supp_rates_len = rates_len;
524 if (supp_rates_len > 8)
527 pos = skb_put(skb, supp_rates_len + 2);
528 *pos++ = WLAN_EID_SUPP_RATES;
529 *pos++ = supp_rates_len;
532 for (i = 0; i < sband->n_bitrates; i++) {
533 if (BIT(i) & rates) {
534 int rate = sband->bitrates[i].bitrate;
535 *pos++ = (u8) (rate / 5);
541 if (rates_len > count) {
542 pos = skb_put(skb, rates_len - count + 2);
543 *pos++ = WLAN_EID_EXT_SUPP_RATES;
544 *pos++ = rates_len - count;
546 for (i++; i < sband->n_bitrates; i++) {
547 if (BIT(i) & rates) {
548 int rate = sband->bitrates[i].bitrate;
549 *pos++ = (u8) (rate / 5);
554 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
555 /* 1. power capabilities */
556 pos = skb_put(skb, 4);
557 *pos++ = WLAN_EID_PWR_CAPABILITY;
559 *pos++ = 0; /* min tx power */
560 *pos++ = chan->max_power; /* max tx power */
562 /* 2. supported channels */
563 /* TODO: get this in reg domain format */
564 pos = skb_put(skb, 2 * sband->n_channels + 2);
565 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
566 *pos++ = 2 * sband->n_channels;
567 for (i = 0; i < sband->n_channels; i++) {
568 *pos++ = ieee80211_frequency_to_channel(
569 sband->channels[i].center_freq);
570 *pos++ = 1; /* one channel in the subband*/
574 /* if present, add any custom IEs that go before HT */
575 if (assoc_data->ie_len && assoc_data->ie) {
576 static const u8 before_ht[] = {
579 WLAN_EID_EXT_SUPP_RATES,
580 WLAN_EID_PWR_CAPABILITY,
581 WLAN_EID_SUPPORTED_CHANNELS,
584 WLAN_EID_RRM_ENABLED_CAPABILITIES,
585 WLAN_EID_MOBILITY_DOMAIN,
586 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
588 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
589 before_ht, ARRAY_SIZE(before_ht),
591 pos = skb_put(skb, noffset - offset);
592 memcpy(pos, assoc_data->ie + offset, noffset - offset);
596 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
597 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
598 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
600 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
601 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
602 sband, chan, sdata->smps_mode);
604 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
605 ieee80211_add_vht_ie(sdata, skb, sband,
606 &assoc_data->ap_vht_cap);
608 /* if present, add any custom non-vendor IEs that go after HT */
609 if (assoc_data->ie_len && assoc_data->ie) {
610 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
613 pos = skb_put(skb, noffset - offset);
614 memcpy(pos, assoc_data->ie + offset, noffset - offset);
618 if (assoc_data->wmm) {
619 if (assoc_data->uapsd) {
620 qos_info = ifmgd->uapsd_queues;
621 qos_info |= (ifmgd->uapsd_max_sp_len <<
622 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
627 pos = skb_put(skb, 9);
628 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
629 *pos++ = 7; /* len */
630 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
633 *pos++ = 2; /* WME */
634 *pos++ = 0; /* WME info */
635 *pos++ = 1; /* WME ver */
639 /* add any remaining custom (i.e. vendor specific here) IEs */
640 if (assoc_data->ie_len && assoc_data->ie) {
641 noffset = assoc_data->ie_len;
642 pos = skb_put(skb, noffset - offset);
643 memcpy(pos, assoc_data->ie + offset, noffset - offset);
646 drv_mgd_prepare_tx(local, sdata);
648 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
649 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
650 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
651 IEEE80211_TX_INTFL_MLME_CONN_TX;
652 ieee80211_tx_skb(sdata, skb);
655 void ieee80211_send_pspoll(struct ieee80211_local *local,
656 struct ieee80211_sub_if_data *sdata)
658 struct ieee80211_pspoll *pspoll;
661 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
665 pspoll = (struct ieee80211_pspoll *) skb->data;
666 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
668 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
669 ieee80211_tx_skb(sdata, skb);
672 void ieee80211_send_nullfunc(struct ieee80211_local *local,
673 struct ieee80211_sub_if_data *sdata,
677 struct ieee80211_hdr_3addr *nullfunc;
678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
680 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
684 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
686 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
688 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
689 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
690 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
691 IEEE80211_STA_CONNECTION_POLL))
692 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
694 ieee80211_tx_skb(sdata, skb);
697 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
698 struct ieee80211_sub_if_data *sdata)
701 struct ieee80211_hdr *nullfunc;
704 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
707 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
711 skb_reserve(skb, local->hw.extra_tx_headroom);
713 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
714 memset(nullfunc, 0, 30);
715 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
716 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
717 nullfunc->frame_control = fc;
718 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
719 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
720 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
721 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
723 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
724 ieee80211_tx_skb(sdata, skb);
727 /* spectrum management related things */
728 static void ieee80211_chswitch_work(struct work_struct *work)
730 struct ieee80211_sub_if_data *sdata =
731 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
734 if (!ieee80211_sdata_running(sdata))
737 mutex_lock(&ifmgd->mtx);
738 if (!ifmgd->associated)
741 sdata->local->_oper_channel = sdata->local->csa_channel;
742 if (!sdata->local->ops->channel_switch) {
743 /* call "hw_config" only if doing sw channel switch */
744 ieee80211_hw_config(sdata->local,
745 IEEE80211_CONF_CHANGE_CHANNEL);
747 /* update the device channel directly */
748 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
751 /* XXX: shouldn't really modify cfg80211-owned data! */
752 ifmgd->associated->channel = sdata->local->_oper_channel;
754 /* XXX: wait for a beacon first? */
755 ieee80211_wake_queues_by_reason(&sdata->local->hw,
756 IEEE80211_QUEUE_STOP_REASON_CSA);
758 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
759 mutex_unlock(&ifmgd->mtx);
762 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
764 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
765 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
767 trace_api_chswitch_done(sdata, success);
770 "driver channel switch failed, disconnecting\n");
771 ieee80211_queue_work(&sdata->local->hw,
772 &ifmgd->csa_connection_drop_work);
774 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
777 EXPORT_SYMBOL(ieee80211_chswitch_done);
779 static void ieee80211_chswitch_timer(unsigned long data)
781 struct ieee80211_sub_if_data *sdata =
782 (struct ieee80211_sub_if_data *) data;
783 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
785 if (sdata->local->quiescing) {
786 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
790 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
793 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
794 struct ieee80211_channel_sw_ie *sw_elem,
795 struct ieee80211_bss *bss,
798 struct cfg80211_bss *cbss =
799 container_of((void *)bss, struct cfg80211_bss, priv);
800 struct ieee80211_channel *new_ch;
801 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
802 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
803 cbss->channel->band);
804 struct ieee80211_chanctx *chanctx;
806 ASSERT_MGD_MTX(ifmgd);
808 if (!ifmgd->associated)
811 if (sdata->local->scanning)
814 /* Disregard subsequent beacons if we are already running a timer
817 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
820 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
821 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
823 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
824 ifmgd->associated->bssid, new_freq);
825 ieee80211_queue_work(&sdata->local->hw,
826 &ifmgd->csa_connection_drop_work);
830 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
832 if (sdata->local->use_chanctx) {
834 "not handling channel switch with channel contexts\n");
835 ieee80211_queue_work(&sdata->local->hw,
836 &ifmgd->csa_connection_drop_work);
840 mutex_lock(&sdata->local->chanctx_mtx);
841 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
842 mutex_unlock(&sdata->local->chanctx_mtx);
845 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
846 struct ieee80211_chanctx, conf);
847 if (chanctx->refcount > 1) {
849 "channel switch with multiple interfaces on the same channel, disconnecting\n");
850 ieee80211_queue_work(&sdata->local->hw,
851 &ifmgd->csa_connection_drop_work);
852 mutex_unlock(&sdata->local->chanctx_mtx);
855 mutex_unlock(&sdata->local->chanctx_mtx);
857 sdata->local->csa_channel = new_ch;
860 ieee80211_stop_queues_by_reason(&sdata->local->hw,
861 IEEE80211_QUEUE_STOP_REASON_CSA);
863 if (sdata->local->ops->channel_switch) {
864 /* use driver's channel switch callback */
865 struct ieee80211_channel_switch ch_switch = {
866 .timestamp = timestamp,
867 .block_tx = sw_elem->mode,
869 .count = sw_elem->count,
872 drv_channel_switch(sdata->local, &ch_switch);
876 /* channel switch handled in software */
877 if (sw_elem->count <= 1)
878 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
880 mod_timer(&ifmgd->chswitch_timer,
881 TU_TO_EXP_TIME(sw_elem->count *
882 cbss->beacon_interval));
885 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
886 struct ieee80211_channel *channel,
887 const u8 *country_ie, u8 country_ie_len,
888 const u8 *pwr_constr_elem)
890 struct ieee80211_country_ie_triplet *triplet;
891 int chan = ieee80211_frequency_to_channel(channel->center_freq);
892 int i, chan_pwr, chan_increment, new_ap_level;
893 bool have_chan_pwr = false;
896 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
899 triplet = (void *)(country_ie + 3);
902 switch (channel->band) {
906 case IEEE80211_BAND_2GHZ:
907 case IEEE80211_BAND_60GHZ:
910 case IEEE80211_BAND_5GHZ:
916 while (country_ie_len >= 3) {
917 u8 first_channel = triplet->chans.first_channel;
919 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
922 for (i = 0; i < triplet->chans.num_channels; i++) {
923 if (first_channel + i * chan_increment == chan) {
924 have_chan_pwr = true;
925 chan_pwr = triplet->chans.max_power;
940 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
942 if (sdata->ap_power_level == new_ap_level)
946 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
947 new_ap_level, chan_pwr, *pwr_constr_elem,
949 sdata->ap_power_level = new_ap_level;
950 if (__ieee80211_recalc_txpower(sdata))
951 return BSS_CHANGED_TXPOWER;
956 static void ieee80211_enable_ps(struct ieee80211_local *local,
957 struct ieee80211_sub_if_data *sdata)
959 struct ieee80211_conf *conf = &local->hw.conf;
962 * If we are scanning right now then the parameters will
963 * take effect when scan finishes.
968 if (conf->dynamic_ps_timeout > 0 &&
969 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
970 mod_timer(&local->dynamic_ps_timer, jiffies +
971 msecs_to_jiffies(conf->dynamic_ps_timeout));
973 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
974 ieee80211_send_nullfunc(local, sdata, 1);
976 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
977 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
980 conf->flags |= IEEE80211_CONF_PS;
981 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
985 static void ieee80211_change_ps(struct ieee80211_local *local)
987 struct ieee80211_conf *conf = &local->hw.conf;
989 if (local->ps_sdata) {
990 ieee80211_enable_ps(local, local->ps_sdata);
991 } else if (conf->flags & IEEE80211_CONF_PS) {
992 conf->flags &= ~IEEE80211_CONF_PS;
993 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
994 del_timer_sync(&local->dynamic_ps_timer);
995 cancel_work_sync(&local->dynamic_ps_enable_work);
999 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1001 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1002 struct sta_info *sta = NULL;
1003 bool authorized = false;
1005 if (!mgd->powersave)
1011 if (!mgd->associated)
1014 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1015 IEEE80211_STA_CONNECTION_POLL))
1019 sta = sta_info_get(sdata, mgd->bssid);
1021 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1027 /* need to hold RTNL or interface lock */
1028 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1030 struct ieee80211_sub_if_data *sdata, *found = NULL;
1034 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1035 local->ps_sdata = NULL;
1039 list_for_each_entry(sdata, &local->interfaces, list) {
1040 if (!ieee80211_sdata_running(sdata))
1042 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1043 /* If an AP vif is found, then disable PS
1044 * by setting the count to zero thereby setting
1050 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1056 if (count == 1 && ieee80211_powersave_allowed(found)) {
1060 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1062 beaconint_us = ieee80211_tu_to_usec(
1063 found->vif.bss_conf.beacon_int);
1065 timeout = local->dynamic_ps_forced_timeout;
1068 * Go to full PSM if the user configures a very low
1069 * latency requirement.
1070 * The 2000 second value is there for compatibility
1071 * until the PM_QOS_NETWORK_LATENCY is configured
1074 if (latency > (1900 * USEC_PER_MSEC) &&
1075 latency != (2000 * USEC_PER_SEC))
1080 local->hw.conf.dynamic_ps_timeout = timeout;
1082 if (beaconint_us > latency) {
1083 local->ps_sdata = NULL;
1086 u8 dtimper = found->u.mgd.dtim_period;
1088 /* If the TIM IE is invalid, pretend the value is 1 */
1091 else if (dtimper > 1)
1092 maxslp = min_t(int, dtimper,
1093 latency / beaconint_us);
1095 local->hw.conf.max_sleep_period = maxslp;
1096 local->hw.conf.ps_dtim_period = dtimper;
1097 local->ps_sdata = found;
1100 local->ps_sdata = NULL;
1103 ieee80211_change_ps(local);
1106 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1108 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1110 if (sdata->vif.bss_conf.ps != ps_allowed) {
1111 sdata->vif.bss_conf.ps = ps_allowed;
1112 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1116 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1118 struct ieee80211_local *local =
1119 container_of(work, struct ieee80211_local,
1120 dynamic_ps_disable_work);
1122 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1123 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1124 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1127 ieee80211_wake_queues_by_reason(&local->hw,
1128 IEEE80211_QUEUE_STOP_REASON_PS);
1131 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1133 struct ieee80211_local *local =
1134 container_of(work, struct ieee80211_local,
1135 dynamic_ps_enable_work);
1136 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1137 struct ieee80211_if_managed *ifmgd;
1138 unsigned long flags;
1141 /* can only happen when PS was just disabled anyway */
1145 ifmgd = &sdata->u.mgd;
1147 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1150 if (local->hw.conf.dynamic_ps_timeout > 0) {
1151 /* don't enter PS if TX frames are pending */
1152 if (drv_tx_frames_pending(local)) {
1153 mod_timer(&local->dynamic_ps_timer, jiffies +
1155 local->hw.conf.dynamic_ps_timeout));
1160 * transmission can be stopped by others which leads to
1161 * dynamic_ps_timer expiry. Postpone the ps timer if it
1162 * is not the actual idle state.
1164 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1165 for (q = 0; q < local->hw.queues; q++) {
1166 if (local->queue_stop_reasons[q]) {
1167 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1169 mod_timer(&local->dynamic_ps_timer, jiffies +
1171 local->hw.conf.dynamic_ps_timeout));
1175 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1178 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1179 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1180 netif_tx_stop_all_queues(sdata->dev);
1182 if (drv_tx_frames_pending(local))
1183 mod_timer(&local->dynamic_ps_timer, jiffies +
1185 local->hw.conf.dynamic_ps_timeout));
1187 ieee80211_send_nullfunc(local, sdata, 1);
1188 /* Flush to get the tx status of nullfunc frame */
1189 drv_flush(local, false);
1193 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1194 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1195 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1196 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1197 local->hw.conf.flags |= IEEE80211_CONF_PS;
1198 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1201 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1202 netif_tx_wake_all_queues(sdata->dev);
1205 void ieee80211_dynamic_ps_timer(unsigned long data)
1207 struct ieee80211_local *local = (void *) data;
1209 if (local->quiescing || local->suspended)
1212 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1215 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1217 struct delayed_work *delayed_work =
1218 container_of(work, struct delayed_work, work);
1219 struct ieee80211_sub_if_data *sdata =
1220 container_of(delayed_work, struct ieee80211_sub_if_data,
1221 dfs_cac_timer_work);
1223 ieee80211_vif_release_channel(sdata);
1225 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1229 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1230 struct ieee80211_sub_if_data *sdata,
1231 u8 *wmm_param, size_t wmm_param_len)
1233 struct ieee80211_tx_queue_params params;
1234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1237 u8 *pos, uapsd_queues = 0;
1239 if (!local->ops->conf_tx)
1242 if (local->hw.queues < IEEE80211_NUM_ACS)
1248 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1251 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1252 uapsd_queues = ifmgd->uapsd_queues;
1254 count = wmm_param[6] & 0x0f;
1255 if (count == ifmgd->wmm_last_param_set)
1257 ifmgd->wmm_last_param_set = count;
1259 pos = wmm_param + 8;
1260 left = wmm_param_len - 8;
1262 memset(¶ms, 0, sizeof(params));
1265 for (; left >= 4; left -= 4, pos += 4) {
1266 int aci = (pos[0] >> 5) & 0x03;
1267 int acm = (pos[0] >> 4) & 0x01;
1275 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1276 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1282 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1283 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1289 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1290 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1297 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1298 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1303 params.aifs = pos[0] & 0x0f;
1304 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1305 params.cw_min = ecw2cw(pos[1] & 0x0f);
1306 params.txop = get_unaligned_le16(pos + 2);
1307 params.uapsd = uapsd;
1310 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1312 params.aifs, params.cw_min, params.cw_max,
1313 params.txop, params.uapsd);
1314 sdata->tx_conf[queue] = params;
1315 if (drv_conf_tx(local, sdata, queue, ¶ms))
1317 "failed to set TX queue parameters for queue %d\n",
1321 /* enable WMM or activate new settings */
1322 sdata->vif.bss_conf.qos = true;
1326 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1328 lockdep_assert_held(&sdata->local->mtx);
1330 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1331 IEEE80211_STA_BEACON_POLL);
1332 ieee80211_run_deferred_scan(sdata->local);
1335 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1337 mutex_lock(&sdata->local->mtx);
1338 __ieee80211_stop_poll(sdata);
1339 mutex_unlock(&sdata->local->mtx);
1342 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1343 u16 capab, bool erp_valid, u8 erp)
1345 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1347 bool use_protection;
1348 bool use_short_preamble;
1349 bool use_short_slot;
1352 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1353 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1355 use_protection = false;
1356 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1359 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1360 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1361 use_short_slot = true;
1363 if (use_protection != bss_conf->use_cts_prot) {
1364 bss_conf->use_cts_prot = use_protection;
1365 changed |= BSS_CHANGED_ERP_CTS_PROT;
1368 if (use_short_preamble != bss_conf->use_short_preamble) {
1369 bss_conf->use_short_preamble = use_short_preamble;
1370 changed |= BSS_CHANGED_ERP_PREAMBLE;
1373 if (use_short_slot != bss_conf->use_short_slot) {
1374 bss_conf->use_short_slot = use_short_slot;
1375 changed |= BSS_CHANGED_ERP_SLOT;
1381 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1382 struct cfg80211_bss *cbss,
1383 u32 bss_info_changed)
1385 struct ieee80211_bss *bss = (void *)cbss->priv;
1386 struct ieee80211_local *local = sdata->local;
1387 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1389 bss_info_changed |= BSS_CHANGED_ASSOC;
1390 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1391 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1393 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1394 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1396 sdata->u.mgd.associated = cbss;
1397 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1399 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1401 if (sdata->vif.p2p) {
1402 const struct cfg80211_bss_ies *ies;
1405 ies = rcu_dereference(cbss->ies);
1410 ret = cfg80211_get_p2p_attr(
1411 ies->data, ies->len,
1412 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1415 bss_conf->p2p_oppps = noa[1] & 0x80;
1416 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1417 bss_info_changed |= BSS_CHANGED_P2P_PS;
1418 sdata->u.mgd.p2p_noa_index = noa[0];
1424 /* just to be sure */
1425 ieee80211_stop_poll(sdata);
1427 ieee80211_led_assoc(local, 1);
1429 if (sdata->u.mgd.assoc_data->have_beacon) {
1431 * If the AP is buggy we may get here with no DTIM period
1432 * known, so assume it's 1 which is the only safe assumption
1433 * in that case, although if the TIM IE is broken powersave
1434 * probably just won't work at all.
1436 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1437 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
1439 bss_conf->dtim_period = 0;
1442 bss_conf->assoc = 1;
1444 /* Tell the driver to monitor connection quality (if supported) */
1445 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1446 bss_conf->cqm_rssi_thold)
1447 bss_info_changed |= BSS_CHANGED_CQM;
1449 /* Enable ARP filtering */
1450 if (bss_conf->arp_addr_cnt)
1451 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1453 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1455 mutex_lock(&local->iflist_mtx);
1456 ieee80211_recalc_ps(local, -1);
1457 mutex_unlock(&local->iflist_mtx);
1459 ieee80211_recalc_smps(sdata);
1460 ieee80211_recalc_ps_vif(sdata);
1462 netif_tx_start_all_queues(sdata->dev);
1463 netif_carrier_on(sdata->dev);
1466 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1467 u16 stype, u16 reason, bool tx,
1470 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1471 struct ieee80211_local *local = sdata->local;
1474 ASSERT_MGD_MTX(ifmgd);
1476 if (WARN_ON_ONCE(tx && !frame_buf))
1479 if (WARN_ON(!ifmgd->associated))
1482 ieee80211_stop_poll(sdata);
1484 ifmgd->associated = NULL;
1487 * we need to commit the associated = NULL change because the
1488 * scan code uses that to determine whether this iface should
1489 * go to/wake up from powersave or not -- and could otherwise
1490 * wake the queues erroneously.
1495 * Thus, we can only afterwards stop the queues -- to account
1496 * for the case where another CPU is finishing a scan at this
1497 * time -- we don't want the scan code to enable queues.
1500 netif_tx_stop_all_queues(sdata->dev);
1501 netif_carrier_off(sdata->dev);
1504 * if we want to get out of ps before disassoc (why?) we have
1505 * to do it before sending disassoc, as otherwise the null-packet
1508 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1509 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1510 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1512 local->ps_sdata = NULL;
1514 /* disable per-vif ps */
1515 ieee80211_recalc_ps_vif(sdata);
1517 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1519 drv_flush(local, false);
1521 /* deauthenticate/disassociate now */
1522 if (tx || frame_buf)
1523 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1524 reason, tx, frame_buf);
1526 /* flush out frame */
1528 drv_flush(local, false);
1530 /* clear bssid only after building the needed mgmt frames */
1531 memset(ifmgd->bssid, 0, ETH_ALEN);
1533 /* remove AP and TDLS peers */
1534 sta_info_flush_defer(sdata);
1536 /* finally reset all BSS / config parameters */
1537 changed |= ieee80211_reset_erp_info(sdata);
1539 ieee80211_led_assoc(local, 0);
1540 changed |= BSS_CHANGED_ASSOC;
1541 sdata->vif.bss_conf.assoc = false;
1543 sdata->vif.bss_conf.p2p_ctwindow = 0;
1544 sdata->vif.bss_conf.p2p_oppps = false;
1546 /* on the next assoc, re-program HT parameters */
1547 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1548 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1550 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1552 del_timer_sync(&local->dynamic_ps_timer);
1553 cancel_work_sync(&local->dynamic_ps_enable_work);
1555 /* Disable ARP filtering */
1556 if (sdata->vif.bss_conf.arp_addr_cnt)
1557 changed |= BSS_CHANGED_ARP_FILTER;
1559 sdata->vif.bss_conf.qos = false;
1560 changed |= BSS_CHANGED_QOS;
1562 /* The BSSID (not really interesting) and HT changed */
1563 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1564 ieee80211_bss_info_change_notify(sdata, changed);
1566 /* disassociated - set to defaults now */
1567 ieee80211_set_wmm_default(sdata, false);
1569 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1570 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1571 del_timer_sync(&sdata->u.mgd.timer);
1572 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1574 sdata->u.mgd.timers_running = 0;
1576 sdata->vif.bss_conf.dtim_period = 0;
1579 ieee80211_vif_release_channel(sdata);
1582 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1583 struct ieee80211_hdr *hdr)
1586 * We can postpone the mgd.timer whenever receiving unicast frames
1587 * from AP because we know that the connection is working both ways
1588 * at that time. But multicast frames (and hence also beacons) must
1589 * be ignored here, because we need to trigger the timer during
1590 * data idle periods for sending the periodic probe request to the
1591 * AP we're connected to.
1593 if (is_multicast_ether_addr(hdr->addr1))
1596 ieee80211_sta_reset_conn_monitor(sdata);
1599 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1601 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1602 struct ieee80211_local *local = sdata->local;
1604 mutex_lock(&local->mtx);
1605 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1606 IEEE80211_STA_CONNECTION_POLL))) {
1607 mutex_unlock(&local->mtx);
1611 __ieee80211_stop_poll(sdata);
1613 mutex_lock(&local->iflist_mtx);
1614 ieee80211_recalc_ps(local, -1);
1615 mutex_unlock(&local->iflist_mtx);
1617 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1621 * We've received a probe response, but are not sure whether
1622 * we have or will be receiving any beacons or data, so let's
1623 * schedule the timers again, just in case.
1625 ieee80211_sta_reset_beacon_monitor(sdata);
1627 mod_timer(&ifmgd->conn_mon_timer,
1628 round_jiffies_up(jiffies +
1629 IEEE80211_CONNECTION_IDLE_TIME));
1631 mutex_unlock(&local->mtx);
1634 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1635 struct ieee80211_hdr *hdr, bool ack)
1637 if (!ieee80211_is_data(hdr->frame_control))
1640 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1641 sdata->u.mgd.probe_send_count > 0) {
1643 ieee80211_sta_reset_conn_monitor(sdata);
1645 sdata->u.mgd.nullfunc_failed = true;
1646 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1651 ieee80211_sta_reset_conn_monitor(sdata);
1654 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1658 u8 *dst = ifmgd->associated->bssid;
1659 u8 unicast_limit = max(1, max_probe_tries - 3);
1662 * Try sending broadcast probe requests for the last three
1663 * probe requests after the first ones failed since some
1664 * buggy APs only support broadcast probe requests.
1666 if (ifmgd->probe_send_count >= unicast_limit)
1670 * When the hardware reports an accurate Tx ACK status, it's
1671 * better to send a nullfunc frame instead of a probe request,
1672 * as it will kick us off the AP quickly if we aren't associated
1673 * anymore. The timeout will be reset if the frame is ACKed by
1676 ifmgd->probe_send_count++;
1678 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1679 ifmgd->nullfunc_failed = false;
1680 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1685 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1686 if (WARN_ON_ONCE(ssid == NULL))
1691 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1692 0, (u32) -1, true, 0,
1693 ifmgd->associated->channel, false);
1697 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1698 run_again(ifmgd, ifmgd->probe_timeout);
1699 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1700 drv_flush(sdata->local, false);
1703 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1706 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1707 bool already = false;
1709 if (!ieee80211_sdata_running(sdata))
1712 mutex_lock(&ifmgd->mtx);
1714 if (!ifmgd->associated)
1717 mutex_lock(&sdata->local->mtx);
1719 if (sdata->local->tmp_channel || sdata->local->scanning) {
1720 mutex_unlock(&sdata->local->mtx);
1725 mlme_dbg_ratelimited(sdata,
1726 "detected beacon loss from AP - probing\n");
1728 ieee80211_cqm_rssi_notify(&sdata->vif,
1729 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
1732 * The driver/our work has already reported this event or the
1733 * connection monitoring has kicked in and we have already sent
1734 * a probe request. Or maybe the AP died and the driver keeps
1735 * reporting until we disassociate...
1737 * In either case we have to ignore the current call to this
1738 * function (except for setting the correct probe reason bit)
1739 * because otherwise we would reset the timer every time and
1740 * never check whether we received a probe response!
1742 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1743 IEEE80211_STA_CONNECTION_POLL))
1747 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1749 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1751 mutex_unlock(&sdata->local->mtx);
1756 mutex_lock(&sdata->local->iflist_mtx);
1757 ieee80211_recalc_ps(sdata->local, -1);
1758 mutex_unlock(&sdata->local->iflist_mtx);
1760 ifmgd->probe_send_count = 0;
1761 ieee80211_mgd_probe_ap_send(sdata);
1763 mutex_unlock(&ifmgd->mtx);
1766 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1767 struct ieee80211_vif *vif)
1769 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1770 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1771 struct cfg80211_bss *cbss;
1772 struct sk_buff *skb;
1776 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1779 ASSERT_MGD_MTX(ifmgd);
1781 if (ifmgd->associated)
1782 cbss = ifmgd->associated;
1783 else if (ifmgd->auth_data)
1784 cbss = ifmgd->auth_data->bss;
1785 else if (ifmgd->assoc_data)
1786 cbss = ifmgd->assoc_data->bss;
1791 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
1792 if (WARN_ON_ONCE(ssid == NULL))
1797 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
1798 (u32) -1, cbss->channel,
1805 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1807 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1809 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1810 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1812 mutex_lock(&ifmgd->mtx);
1813 if (!ifmgd->associated) {
1814 mutex_unlock(&ifmgd->mtx);
1818 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1819 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1821 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1822 mutex_unlock(&ifmgd->mtx);
1825 * must be outside lock due to cfg80211,
1826 * but that's not a problem.
1828 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1831 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1833 struct ieee80211_sub_if_data *sdata =
1834 container_of(work, struct ieee80211_sub_if_data,
1835 u.mgd.beacon_connection_loss_work);
1836 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1837 struct sta_info *sta;
1839 if (ifmgd->associated) {
1841 sta = sta_info_get(sdata, ifmgd->bssid);
1843 sta->beacon_loss_count++;
1847 if (ifmgd->connection_loss) {
1848 sdata_info(sdata, "Connection to AP %pM lost\n",
1850 __ieee80211_disconnect(sdata);
1852 ieee80211_mgd_probe_ap(sdata, true);
1856 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1858 struct ieee80211_sub_if_data *sdata =
1859 container_of(work, struct ieee80211_sub_if_data,
1860 u.mgd.csa_connection_drop_work);
1862 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1863 IEEE80211_QUEUE_STOP_REASON_CSA);
1864 __ieee80211_disconnect(sdata);
1867 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1869 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1870 struct ieee80211_hw *hw = &sdata->local->hw;
1872 trace_api_beacon_loss(sdata);
1874 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1875 sdata->u.mgd.connection_loss = false;
1876 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1878 EXPORT_SYMBOL(ieee80211_beacon_loss);
1880 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1882 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1883 struct ieee80211_hw *hw = &sdata->local->hw;
1885 trace_api_connection_loss(sdata);
1887 sdata->u.mgd.connection_loss = true;
1888 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1890 EXPORT_SYMBOL(ieee80211_connection_loss);
1893 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1896 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1898 lockdep_assert_held(&sdata->u.mgd.mtx);
1901 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1903 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1904 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1905 sdata->u.mgd.flags = 0;
1906 ieee80211_vif_release_channel(sdata);
1909 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
1911 sdata->u.mgd.auth_data = NULL;
1914 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1915 struct ieee80211_mgmt *mgmt, size_t len)
1917 struct ieee80211_local *local = sdata->local;
1918 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1920 struct ieee802_11_elems elems;
1923 pos = mgmt->u.auth.variable;
1924 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1925 if (!elems.challenge)
1927 auth_data->expected_transaction = 4;
1928 drv_mgd_prepare_tx(sdata->local, sdata);
1929 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1930 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
1931 IEEE80211_TX_INTFL_MLME_CONN_TX;
1932 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
1933 elems.challenge - 2, elems.challenge_len + 2,
1934 auth_data->bss->bssid, auth_data->bss->bssid,
1935 auth_data->key, auth_data->key_len,
1936 auth_data->key_idx, tx_flags);
1939 static enum rx_mgmt_action __must_check
1940 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1941 struct ieee80211_mgmt *mgmt, size_t len)
1943 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1945 u16 auth_alg, auth_transaction, status_code;
1946 struct sta_info *sta;
1948 lockdep_assert_held(&ifmgd->mtx);
1951 return RX_MGMT_NONE;
1953 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1954 return RX_MGMT_NONE;
1956 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1958 if (!ether_addr_equal(bssid, mgmt->bssid))
1959 return RX_MGMT_NONE;
1961 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1962 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1963 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1965 if (auth_alg != ifmgd->auth_data->algorithm ||
1966 auth_transaction != ifmgd->auth_data->expected_transaction) {
1967 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1968 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1970 ifmgd->auth_data->expected_transaction);
1971 return RX_MGMT_NONE;
1974 if (status_code != WLAN_STATUS_SUCCESS) {
1975 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1976 mgmt->sa, status_code);
1977 ieee80211_destroy_auth_data(sdata, false);
1978 return RX_MGMT_CFG80211_RX_AUTH;
1981 switch (ifmgd->auth_data->algorithm) {
1982 case WLAN_AUTH_OPEN:
1983 case WLAN_AUTH_LEAP:
1987 case WLAN_AUTH_SHARED_KEY:
1988 if (ifmgd->auth_data->expected_transaction != 4) {
1989 ieee80211_auth_challenge(sdata, mgmt, len);
1990 /* need another frame */
1991 return RX_MGMT_NONE;
1995 WARN_ONCE(1, "invalid auth alg %d",
1996 ifmgd->auth_data->algorithm);
1997 return RX_MGMT_NONE;
2000 sdata_info(sdata, "authenticated\n");
2001 ifmgd->auth_data->done = true;
2002 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2003 ifmgd->auth_data->timeout_started = true;
2004 run_again(ifmgd, ifmgd->auth_data->timeout);
2006 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2007 ifmgd->auth_data->expected_transaction != 2) {
2009 * Report auth frame to user space for processing since another
2010 * round of Authentication frames is still needed.
2012 return RX_MGMT_CFG80211_RX_AUTH;
2015 /* move station state to auth */
2016 mutex_lock(&sdata->local->sta_mtx);
2017 sta = sta_info_get(sdata, bssid);
2019 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2022 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2023 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2026 mutex_unlock(&sdata->local->sta_mtx);
2028 return RX_MGMT_CFG80211_RX_AUTH;
2030 mutex_unlock(&sdata->local->sta_mtx);
2031 /* ignore frame -- wait for timeout */
2032 return RX_MGMT_NONE;
2036 static enum rx_mgmt_action __must_check
2037 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2038 struct ieee80211_mgmt *mgmt, size_t len)
2040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2041 const u8 *bssid = NULL;
2044 lockdep_assert_held(&ifmgd->mtx);
2047 return RX_MGMT_NONE;
2049 if (!ifmgd->associated ||
2050 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2051 return RX_MGMT_NONE;
2053 bssid = ifmgd->associated->bssid;
2055 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2057 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2058 bssid, reason_code);
2060 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2062 return RX_MGMT_CFG80211_DEAUTH;
2066 static enum rx_mgmt_action __must_check
2067 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2068 struct ieee80211_mgmt *mgmt, size_t len)
2070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2073 lockdep_assert_held(&ifmgd->mtx);
2076 return RX_MGMT_NONE;
2078 if (!ifmgd->associated ||
2079 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2080 return RX_MGMT_NONE;
2082 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2084 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2085 mgmt->sa, reason_code);
2087 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2089 return RX_MGMT_CFG80211_DISASSOC;
2092 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2093 u8 *supp_rates, unsigned int supp_rates_len,
2094 u32 *rates, u32 *basic_rates,
2095 bool *have_higher_than_11mbit,
2096 int *min_rate, int *min_rate_index)
2100 for (i = 0; i < supp_rates_len; i++) {
2101 int rate = (supp_rates[i] & 0x7f) * 5;
2102 bool is_basic = !!(supp_rates[i] & 0x80);
2105 *have_higher_than_11mbit = true;
2108 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2109 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2111 * Note: Even through the membership selector and the basic
2112 * rate flag share the same bit, they are not exactly
2115 if (!!(supp_rates[i] & 0x80) &&
2116 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2119 for (j = 0; j < sband->n_bitrates; j++) {
2120 if (sband->bitrates[j].bitrate == rate) {
2123 *basic_rates |= BIT(j);
2124 if (rate < *min_rate) {
2126 *min_rate_index = j;
2134 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2137 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2139 lockdep_assert_held(&sdata->u.mgd.mtx);
2142 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2144 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2145 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2146 sdata->u.mgd.flags = 0;
2147 ieee80211_vif_release_channel(sdata);
2151 sdata->u.mgd.assoc_data = NULL;
2154 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2155 struct cfg80211_bss *cbss,
2156 struct ieee80211_mgmt *mgmt, size_t len)
2158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2159 struct ieee80211_local *local = sdata->local;
2160 struct ieee80211_supported_band *sband;
2161 struct sta_info *sta;
2163 u16 capab_info, aid;
2164 struct ieee802_11_elems elems;
2165 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2169 /* AssocResp and ReassocResp have identical structure */
2171 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2172 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2174 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2175 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2177 aid &= ~(BIT(15) | BIT(14));
2179 ifmgd->broken_ap = false;
2181 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2182 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2185 ifmgd->broken_ap = true;
2188 pos = mgmt->u.assoc_resp.variable;
2189 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2191 if (!elems.supp_rates) {
2192 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2198 mutex_lock(&sdata->local->sta_mtx);
2200 * station info was already allocated and inserted before
2201 * the association and should be available to us
2203 sta = sta_info_get(sdata, cbss->bssid);
2204 if (WARN_ON(!sta)) {
2205 mutex_unlock(&sdata->local->sta_mtx);
2209 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2211 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2212 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2213 elems.ht_cap_elem, &sta->sta.ht_cap);
2215 sta->supports_40mhz =
2216 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2218 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2219 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2223 rate_control_rate_init(sta);
2225 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2226 set_sta_flag(sta, WLAN_STA_MFP);
2228 if (elems.wmm_param)
2229 set_sta_flag(sta, WLAN_STA_WME);
2231 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2232 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2233 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2236 "failed to move station %pM to desired state\n",
2238 WARN_ON(__sta_info_destroy(sta));
2239 mutex_unlock(&sdata->local->sta_mtx);
2243 mutex_unlock(&sdata->local->sta_mtx);
2246 * Always handle WMM once after association regardless
2247 * of the first value the AP uses. Setting -1 here has
2248 * that effect because the AP values is an unsigned
2251 ifmgd->wmm_last_param_set = -1;
2253 if (elems.wmm_param)
2254 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2255 elems.wmm_param_len);
2257 ieee80211_set_wmm_default(sdata, false);
2258 changed |= BSS_CHANGED_QOS;
2260 if (elems.ht_operation && elems.wmm_param &&
2261 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2262 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2263 cbss->bssid, false);
2265 /* set AID and assoc capability,
2266 * ieee80211_set_associated() will tell the driver */
2267 bss_conf->aid = aid;
2268 bss_conf->assoc_capability = capab_info;
2269 ieee80211_set_associated(sdata, cbss, changed);
2272 * If we're using 4-addr mode, let the AP know that we're
2273 * doing so, so that it can create the STA VLAN on its side
2275 if (ifmgd->use_4addr)
2276 ieee80211_send_4addr_nullfunc(local, sdata);
2279 * Start timer to probe the connection to the AP now.
2280 * Also start the timer that will detect beacon loss.
2282 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2283 ieee80211_sta_reset_beacon_monitor(sdata);
2288 static enum rx_mgmt_action __must_check
2289 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2290 struct ieee80211_mgmt *mgmt, size_t len,
2291 struct cfg80211_bss **bss)
2293 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2294 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2295 u16 capab_info, status_code, aid;
2296 struct ieee802_11_elems elems;
2300 lockdep_assert_held(&ifmgd->mtx);
2303 return RX_MGMT_NONE;
2304 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2305 return RX_MGMT_NONE;
2308 * AssocResp and ReassocResp have identical structure, so process both
2309 * of them in this function.
2313 return RX_MGMT_NONE;
2315 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2316 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2317 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2318 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2321 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2322 reassoc ? "Rea" : "A", mgmt->sa,
2323 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2325 pos = mgmt->u.assoc_resp.variable;
2326 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2328 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2329 elems.timeout_int && elems.timeout_int_len == 5 &&
2330 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2332 tu = get_unaligned_le32(elems.timeout_int + 1);
2333 ms = tu * 1024 / 1000;
2335 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2337 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2338 assoc_data->timeout_started = true;
2339 if (ms > IEEE80211_ASSOC_TIMEOUT)
2340 run_again(ifmgd, assoc_data->timeout);
2341 return RX_MGMT_NONE;
2344 *bss = assoc_data->bss;
2346 if (status_code != WLAN_STATUS_SUCCESS) {
2347 sdata_info(sdata, "%pM denied association (code=%d)\n",
2348 mgmt->sa, status_code);
2349 ieee80211_destroy_assoc_data(sdata, false);
2351 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2352 /* oops -- internal error -- send timeout for now */
2353 ieee80211_destroy_assoc_data(sdata, false);
2354 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
2355 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2357 sdata_info(sdata, "associated\n");
2360 * destroy assoc_data afterwards, as otherwise an idle
2361 * recalc after assoc_data is NULL but before associated
2362 * is set can cause the interface to go idle
2364 ieee80211_destroy_assoc_data(sdata, true);
2367 return RX_MGMT_CFG80211_RX_ASSOC;
2370 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2371 struct ieee80211_mgmt *mgmt, size_t len,
2372 struct ieee80211_rx_status *rx_status,
2373 struct ieee802_11_elems *elems)
2375 struct ieee80211_local *local = sdata->local;
2377 struct ieee80211_bss *bss;
2378 struct ieee80211_channel *channel;
2379 bool need_ps = false;
2381 if ((sdata->u.mgd.associated &&
2382 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2383 (sdata->u.mgd.assoc_data &&
2384 ether_addr_equal(mgmt->bssid,
2385 sdata->u.mgd.assoc_data->bss->bssid))) {
2386 /* not previously set so we may need to recalc */
2387 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2389 if (elems->tim && !elems->parse_error) {
2390 struct ieee80211_tim_ie *tim_ie = elems->tim;
2391 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2395 if (elems->ds_params && elems->ds_params_len == 1)
2396 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2399 freq = rx_status->freq;
2401 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2403 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2406 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2409 ieee80211_rx_bss_put(local, bss);
2411 if (!sdata->u.mgd.associated)
2415 mutex_lock(&local->iflist_mtx);
2416 ieee80211_recalc_ps(local, -1);
2417 mutex_unlock(&local->iflist_mtx);
2420 if (elems->ch_switch_ie &&
2421 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2422 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
2423 bss, rx_status->mactime);
2427 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2428 struct sk_buff *skb)
2430 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2431 struct ieee80211_if_managed *ifmgd;
2432 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2433 size_t baselen, len = skb->len;
2434 struct ieee802_11_elems elems;
2436 ifmgd = &sdata->u.mgd;
2438 ASSERT_MGD_MTX(ifmgd);
2440 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2441 return; /* ignore ProbeResp to foreign address */
2443 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2447 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2450 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2452 if (ifmgd->associated &&
2453 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2454 ieee80211_reset_ap_probe(sdata);
2456 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2457 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2458 /* got probe response, continue with auth */
2459 sdata_info(sdata, "direct probe responded\n");
2460 ifmgd->auth_data->tries = 0;
2461 ifmgd->auth_data->timeout = jiffies;
2462 ifmgd->auth_data->timeout_started = true;
2463 run_again(ifmgd, ifmgd->auth_data->timeout);
2468 * This is the canonical list of information elements we care about,
2469 * the filter code also gives us all changes to the Microsoft OUI
2470 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2472 * We implement beacon filtering in software since that means we can
2473 * avoid processing the frame here and in cfg80211, and userspace
2474 * will not be able to tell whether the hardware supports it or not.
2476 * XXX: This list needs to be dynamic -- userspace needs to be able to
2477 * add items it requires. It also needs to be able to tell us to
2478 * look out for other vendor IEs.
2480 static const u64 care_about_ies =
2481 (1ULL << WLAN_EID_COUNTRY) |
2482 (1ULL << WLAN_EID_ERP_INFO) |
2483 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2484 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2485 (1ULL << WLAN_EID_HT_CAPABILITY) |
2486 (1ULL << WLAN_EID_HT_OPERATION);
2488 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2489 struct ieee80211_mgmt *mgmt,
2491 struct ieee80211_rx_status *rx_status)
2493 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2494 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2496 struct ieee802_11_elems elems;
2497 struct ieee80211_local *local = sdata->local;
2498 struct ieee80211_chanctx_conf *chanctx_conf;
2499 struct ieee80211_channel *chan;
2506 lockdep_assert_held(&ifmgd->mtx);
2508 /* Process beacon from the current BSS */
2509 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2514 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2515 if (!chanctx_conf) {
2520 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2524 chan = chanctx_conf->def.chan;
2527 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2528 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2529 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2530 len - baselen, &elems);
2532 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2533 ifmgd->assoc_data->have_beacon = true;
2534 ifmgd->assoc_data->need_beacon = false;
2535 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2536 sdata->vif.bss_conf.sync_tsf =
2537 le64_to_cpu(mgmt->u.beacon.timestamp);
2538 sdata->vif.bss_conf.sync_device_ts =
2539 rx_status->device_timestamp;
2541 sdata->vif.bss_conf.sync_dtim_count =
2542 elems.tim->dtim_count;
2544 sdata->vif.bss_conf.sync_dtim_count = 0;
2546 /* continue assoc process */
2547 ifmgd->assoc_data->timeout = jiffies;
2548 ifmgd->assoc_data->timeout_started = true;
2549 run_again(ifmgd, ifmgd->assoc_data->timeout);
2553 if (!ifmgd->associated ||
2554 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2556 bssid = ifmgd->associated->bssid;
2558 /* Track average RSSI from the Beacon frames of the current AP */
2559 ifmgd->last_beacon_signal = rx_status->signal;
2560 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2561 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2562 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2563 ifmgd->last_cqm_event_signal = 0;
2564 ifmgd->count_beacon_signal = 1;
2565 ifmgd->last_ave_beacon_signal = 0;
2567 ifmgd->ave_beacon_signal =
2568 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2569 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2570 ifmgd->ave_beacon_signal) / 16;
2571 ifmgd->count_beacon_signal++;
2574 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2575 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2576 int sig = ifmgd->ave_beacon_signal;
2577 int last_sig = ifmgd->last_ave_beacon_signal;
2580 * if signal crosses either of the boundaries, invoke callback
2581 * with appropriate parameters
2583 if (sig > ifmgd->rssi_max_thold &&
2584 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2585 ifmgd->last_ave_beacon_signal = sig;
2586 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
2587 } else if (sig < ifmgd->rssi_min_thold &&
2588 (last_sig >= ifmgd->rssi_max_thold ||
2590 ifmgd->last_ave_beacon_signal = sig;
2591 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
2595 if (bss_conf->cqm_rssi_thold &&
2596 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2597 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2598 int sig = ifmgd->ave_beacon_signal / 16;
2599 int last_event = ifmgd->last_cqm_event_signal;
2600 int thold = bss_conf->cqm_rssi_thold;
2601 int hyst = bss_conf->cqm_rssi_hyst;
2603 (last_event == 0 || sig < last_event - hyst)) {
2604 ifmgd->last_cqm_event_signal = sig;
2605 ieee80211_cqm_rssi_notify(
2607 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2609 } else if (sig > thold &&
2610 (last_event == 0 || sig > last_event + hyst)) {
2611 ifmgd->last_cqm_event_signal = sig;
2612 ieee80211_cqm_rssi_notify(
2614 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2619 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2620 mlme_dbg_ratelimited(sdata,
2621 "cancelling AP probe due to a received beacon\n");
2622 mutex_lock(&local->mtx);
2623 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2624 ieee80211_run_deferred_scan(local);
2625 mutex_unlock(&local->mtx);
2627 mutex_lock(&local->iflist_mtx);
2628 ieee80211_recalc_ps(local, -1);
2629 mutex_unlock(&local->iflist_mtx);
2633 * Push the beacon loss detection into the future since
2634 * we are processing a beacon from the AP just now.
2636 ieee80211_sta_reset_beacon_monitor(sdata);
2638 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2639 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2640 len - baselen, &elems,
2641 care_about_ies, ncrc);
2643 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2644 bool directed_tim = ieee80211_check_tim(elems.tim,
2648 if (local->hw.conf.dynamic_ps_timeout > 0) {
2649 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2650 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2651 ieee80211_hw_config(local,
2652 IEEE80211_CONF_CHANGE_PS);
2654 ieee80211_send_nullfunc(local, sdata, 0);
2655 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2656 local->pspolling = true;
2659 * Here is assumed that the driver will be
2660 * able to send ps-poll frame and receive a
2661 * response even though power save mode is
2662 * enabled, but some drivers might require
2663 * to disable power save here. This needs
2664 * to be investigated.
2666 ieee80211_send_pspoll(local, sdata);
2671 if (sdata->vif.p2p) {
2675 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2677 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2679 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2680 bss_conf->p2p_oppps = noa[1] & 0x80;
2681 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2682 changed |= BSS_CHANGED_P2P_PS;
2683 sdata->u.mgd.p2p_noa_index = noa[0];
2685 * make sure we update all information, the CRC
2686 * mechanism doesn't look at P2P attributes.
2688 ifmgd->beacon_crc_valid = false;
2692 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2694 ifmgd->beacon_crc = ncrc;
2695 ifmgd->beacon_crc_valid = true;
2697 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2699 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2700 elems.wmm_param_len))
2701 changed |= BSS_CHANGED_QOS;
2704 * If we haven't had a beacon before, tell the driver about the
2705 * DTIM period (and beacon timing if desired) now.
2707 if (!bss_conf->dtim_period) {
2708 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2710 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2712 bss_conf->dtim_period = 1;
2714 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2715 sdata->vif.bss_conf.sync_tsf =
2716 le64_to_cpu(mgmt->u.beacon.timestamp);
2717 sdata->vif.bss_conf.sync_device_ts =
2718 rx_status->device_timestamp;
2720 sdata->vif.bss_conf.sync_dtim_count =
2721 elems.tim->dtim_count;
2723 sdata->vif.bss_conf.sync_dtim_count = 0;
2726 changed |= BSS_CHANGED_DTIM_PERIOD;
2729 if (elems.erp_info && elems.erp_info_len >= 1) {
2731 erp_value = elems.erp_info[0];
2735 changed |= ieee80211_handle_bss_capability(sdata,
2736 le16_to_cpu(mgmt->u.beacon.capab_info),
2737 erp_valid, erp_value);
2740 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
2741 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2742 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2745 if (elems.country_elem && elems.pwr_constr_elem &&
2746 mgmt->u.probe_resp.capab_info &
2747 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
2748 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2750 elems.country_elem_len,
2751 elems.pwr_constr_elem);
2753 ieee80211_bss_info_change_notify(sdata, changed);
2756 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2757 struct sk_buff *skb)
2759 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2760 struct ieee80211_rx_status *rx_status;
2761 struct ieee80211_mgmt *mgmt;
2762 struct cfg80211_bss *bss = NULL;
2763 enum rx_mgmt_action rma = RX_MGMT_NONE;
2766 rx_status = (struct ieee80211_rx_status *) skb->cb;
2767 mgmt = (struct ieee80211_mgmt *) skb->data;
2768 fc = le16_to_cpu(mgmt->frame_control);
2770 mutex_lock(&ifmgd->mtx);
2772 switch (fc & IEEE80211_FCTL_STYPE) {
2773 case IEEE80211_STYPE_BEACON:
2774 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2776 case IEEE80211_STYPE_PROBE_RESP:
2777 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2779 case IEEE80211_STYPE_AUTH:
2780 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2782 case IEEE80211_STYPE_DEAUTH:
2783 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2785 case IEEE80211_STYPE_DISASSOC:
2786 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2788 case IEEE80211_STYPE_ASSOC_RESP:
2789 case IEEE80211_STYPE_REASSOC_RESP:
2790 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2792 case IEEE80211_STYPE_ACTION:
2793 switch (mgmt->u.action.category) {
2794 case WLAN_CATEGORY_SPECTRUM_MGMT:
2795 ieee80211_sta_process_chanswitch(sdata,
2796 &mgmt->u.action.u.chan_switch.sw_elem,
2797 (void *)ifmgd->associated->priv,
2798 rx_status->mactime);
2802 mutex_unlock(&ifmgd->mtx);
2808 case RX_MGMT_CFG80211_DEAUTH:
2809 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2811 case RX_MGMT_CFG80211_DISASSOC:
2812 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2814 case RX_MGMT_CFG80211_RX_AUTH:
2815 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2817 case RX_MGMT_CFG80211_RX_ASSOC:
2818 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2820 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2821 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2824 WARN(1, "unexpected: %d", rma);
2828 static void ieee80211_sta_timer(unsigned long data)
2830 struct ieee80211_sub_if_data *sdata =
2831 (struct ieee80211_sub_if_data *) data;
2832 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2833 struct ieee80211_local *local = sdata->local;
2835 if (local->quiescing) {
2836 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2840 ieee80211_queue_work(&local->hw, &sdata->work);
2843 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2844 u8 *bssid, u8 reason, bool tx)
2846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2847 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2849 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2851 mutex_unlock(&ifmgd->mtx);
2854 * must be outside lock due to cfg80211,
2855 * but that's not a problem.
2857 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
2859 mutex_lock(&ifmgd->mtx);
2862 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2864 struct ieee80211_local *local = sdata->local;
2865 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2866 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2869 lockdep_assert_held(&ifmgd->mtx);
2871 if (WARN_ON_ONCE(!auth_data))
2874 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2875 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2876 IEEE80211_TX_INTFL_MLME_CONN_TX;
2880 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2881 sdata_info(sdata, "authentication with %pM timed out\n",
2882 auth_data->bss->bssid);
2885 * Most likely AP is not in the range so remove the
2886 * bss struct for that AP.
2888 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2893 drv_mgd_prepare_tx(local, sdata);
2895 if (auth_data->bss->proberesp_ies) {
2899 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2900 auth_data->bss->bssid, auth_data->tries,
2901 IEEE80211_AUTH_MAX_TRIES);
2903 auth_data->expected_transaction = 2;
2905 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2906 trans = auth_data->sae_trans;
2907 status = auth_data->sae_status;
2908 auth_data->expected_transaction = trans;
2911 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2912 auth_data->data, auth_data->data_len,
2913 auth_data->bss->bssid,
2914 auth_data->bss->bssid, NULL, 0, 0,
2919 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2920 auth_data->bss->bssid, auth_data->tries,
2921 IEEE80211_AUTH_MAX_TRIES);
2924 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2930 * Direct probe is sent to broadcast address as some APs
2931 * will not answer to direct packet in unassociated state.
2933 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2934 NULL, 0, (u32) -1, true, tx_flags,
2935 auth_data->bss->channel, false);
2939 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
2940 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2941 ifmgd->auth_data->timeout_started = true;
2942 run_again(ifmgd, auth_data->timeout);
2944 auth_data->timeout_started = false;
2950 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2952 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2953 struct ieee80211_local *local = sdata->local;
2955 lockdep_assert_held(&sdata->u.mgd.mtx);
2957 assoc_data->tries++;
2958 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2959 sdata_info(sdata, "association with %pM timed out\n",
2960 assoc_data->bss->bssid);
2963 * Most likely AP is not in the range so remove the
2964 * bss struct for that AP.
2966 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2971 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2972 assoc_data->bss->bssid, assoc_data->tries,
2973 IEEE80211_ASSOC_MAX_TRIES);
2974 ieee80211_send_assoc(sdata);
2976 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
2977 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2978 assoc_data->timeout_started = true;
2979 run_again(&sdata->u.mgd, assoc_data->timeout);
2981 assoc_data->timeout_started = false;
2987 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
2988 __le16 fc, bool acked)
2990 struct ieee80211_local *local = sdata->local;
2992 sdata->u.mgd.status_fc = fc;
2993 sdata->u.mgd.status_acked = acked;
2994 sdata->u.mgd.status_received = true;
2996 ieee80211_queue_work(&local->hw, &sdata->work);
2999 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3001 struct ieee80211_local *local = sdata->local;
3002 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3004 mutex_lock(&ifmgd->mtx);
3006 if (ifmgd->status_received) {
3007 __le16 fc = ifmgd->status_fc;
3008 bool status_acked = ifmgd->status_acked;
3010 ifmgd->status_received = false;
3011 if (ifmgd->auth_data &&
3012 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3014 ifmgd->auth_data->timeout =
3015 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3016 run_again(ifmgd, ifmgd->auth_data->timeout);
3018 ifmgd->auth_data->timeout = jiffies - 1;
3020 ifmgd->auth_data->timeout_started = true;
3021 } else if (ifmgd->assoc_data &&
3022 (ieee80211_is_assoc_req(fc) ||
3023 ieee80211_is_reassoc_req(fc))) {
3025 ifmgd->assoc_data->timeout =
3026 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3027 run_again(ifmgd, ifmgd->assoc_data->timeout);
3029 ifmgd->assoc_data->timeout = jiffies - 1;
3031 ifmgd->assoc_data->timeout_started = true;
3035 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3036 time_after(jiffies, ifmgd->auth_data->timeout)) {
3037 if (ifmgd->auth_data->done) {
3039 * ok ... we waited for assoc but userspace didn't,
3040 * so let's just kill the auth data
3042 ieee80211_destroy_auth_data(sdata, false);
3043 } else if (ieee80211_probe_auth(sdata)) {
3046 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3048 ieee80211_destroy_auth_data(sdata, false);
3050 mutex_unlock(&ifmgd->mtx);
3051 cfg80211_send_auth_timeout(sdata->dev, bssid);
3052 mutex_lock(&ifmgd->mtx);
3054 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3055 run_again(ifmgd, ifmgd->auth_data->timeout);
3057 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3058 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3059 if ((ifmgd->assoc_data->need_beacon &&
3060 !ifmgd->assoc_data->have_beacon) ||
3061 ieee80211_do_assoc(sdata)) {
3064 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3066 ieee80211_destroy_assoc_data(sdata, false);
3068 mutex_unlock(&ifmgd->mtx);
3069 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3070 mutex_lock(&ifmgd->mtx);
3072 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3073 run_again(ifmgd, ifmgd->assoc_data->timeout);
3075 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3076 IEEE80211_STA_CONNECTION_POLL) &&
3077 ifmgd->associated) {
3081 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3083 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3084 max_tries = max_nullfunc_tries;
3086 max_tries = max_probe_tries;
3088 /* ACK received for nullfunc probing frame */
3089 if (!ifmgd->probe_send_count)
3090 ieee80211_reset_ap_probe(sdata);
3091 else if (ifmgd->nullfunc_failed) {
3092 if (ifmgd->probe_send_count < max_tries) {
3094 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3095 bssid, ifmgd->probe_send_count,
3097 ieee80211_mgd_probe_ap_send(sdata);
3100 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3102 ieee80211_sta_connection_lost(sdata, bssid,
3103 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3106 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3107 run_again(ifmgd, ifmgd->probe_timeout);
3108 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3110 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3111 bssid, probe_wait_ms);
3112 ieee80211_sta_connection_lost(sdata, bssid,
3113 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3114 } else if (ifmgd->probe_send_count < max_tries) {
3116 "No probe response from AP %pM after %dms, try %d/%i\n",
3117 bssid, probe_wait_ms,
3118 ifmgd->probe_send_count, max_tries);
3119 ieee80211_mgd_probe_ap_send(sdata);
3122 * We actually lost the connection ... or did we?
3125 wiphy_debug(local->hw.wiphy,
3126 "%s: No probe response from AP %pM"
3127 " after %dms, disconnecting.\n",
3129 bssid, probe_wait_ms);
3131 ieee80211_sta_connection_lost(sdata, bssid,
3132 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3136 mutex_unlock(&ifmgd->mtx);
3139 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3141 struct ieee80211_sub_if_data *sdata =
3142 (struct ieee80211_sub_if_data *) data;
3143 struct ieee80211_local *local = sdata->local;
3145 if (local->quiescing)
3148 sdata->u.mgd.connection_loss = false;
3149 ieee80211_queue_work(&sdata->local->hw,
3150 &sdata->u.mgd.beacon_connection_loss_work);
3153 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3155 struct ieee80211_sub_if_data *sdata =
3156 (struct ieee80211_sub_if_data *) data;
3157 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3158 struct ieee80211_local *local = sdata->local;
3160 if (local->quiescing)
3163 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3166 static void ieee80211_sta_monitor_work(struct work_struct *work)
3168 struct ieee80211_sub_if_data *sdata =
3169 container_of(work, struct ieee80211_sub_if_data,
3170 u.mgd.monitor_work);
3172 ieee80211_mgd_probe_ap(sdata, false);
3175 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3179 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3180 __ieee80211_stop_poll(sdata);
3182 /* let's probe the connection once */
3183 flags = sdata->local->hw.flags;
3184 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3185 ieee80211_queue_work(&sdata->local->hw,
3186 &sdata->u.mgd.monitor_work);
3187 /* and do all the other regular work too */
3188 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3193 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3195 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3198 * we need to use atomic bitops for the running bits
3199 * only because both timers might fire at the same
3200 * time -- the code here is properly synchronised.
3203 cancel_work_sync(&ifmgd->request_smps_work);
3205 cancel_work_sync(&ifmgd->monitor_work);
3206 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
3207 cancel_work_sync(&ifmgd->csa_connection_drop_work);
3208 if (del_timer_sync(&ifmgd->timer))
3209 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3211 cancel_work_sync(&ifmgd->chswitch_work);
3212 if (del_timer_sync(&ifmgd->chswitch_timer))
3213 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
3215 /* these will just be re-established on connection */
3216 del_timer_sync(&ifmgd->conn_mon_timer);
3217 del_timer_sync(&ifmgd->bcn_mon_timer);
3220 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3222 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3224 mutex_lock(&ifmgd->mtx);
3225 if (!ifmgd->associated) {
3226 mutex_unlock(&ifmgd->mtx);
3230 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3231 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3232 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3233 ieee80211_sta_connection_lost(sdata,
3234 ifmgd->associated->bssid,
3235 WLAN_REASON_UNSPECIFIED,
3237 mutex_unlock(&ifmgd->mtx);
3240 mutex_unlock(&ifmgd->mtx);
3242 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3243 add_timer(&ifmgd->timer);
3244 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3245 add_timer(&ifmgd->chswitch_timer);
3246 ieee80211_sta_reset_beacon_monitor(sdata);
3248 mutex_lock(&sdata->local->mtx);
3249 ieee80211_restart_sta_timer(sdata);
3250 mutex_unlock(&sdata->local->mtx);
3254 /* interface setup */
3255 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3257 struct ieee80211_if_managed *ifmgd;
3259 ifmgd = &sdata->u.mgd;
3260 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3261 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3262 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3263 ieee80211_beacon_connection_loss_work);
3264 INIT_WORK(&ifmgd->csa_connection_drop_work,
3265 ieee80211_csa_connection_drop_work);
3266 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3267 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3268 (unsigned long) sdata);
3269 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3270 (unsigned long) sdata);
3271 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3272 (unsigned long) sdata);
3273 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3274 (unsigned long) sdata);
3277 ifmgd->powersave = sdata->wdev.ps;
3278 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3279 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
3281 mutex_init(&ifmgd->mtx);
3283 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3284 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3286 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3289 /* scan finished notification */
3290 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3292 struct ieee80211_sub_if_data *sdata;
3294 /* Restart STA timers */
3296 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3297 ieee80211_restart_sta_timer(sdata);
3301 int ieee80211_max_network_latency(struct notifier_block *nb,
3302 unsigned long data, void *dummy)
3304 s32 latency_usec = (s32) data;
3305 struct ieee80211_local *local =
3306 container_of(nb, struct ieee80211_local,
3307 network_latency_notifier);
3309 mutex_lock(&local->iflist_mtx);
3310 ieee80211_recalc_ps(local, latency_usec);
3311 mutex_unlock(&local->iflist_mtx);
3316 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
3322 case NL80211_CHAN_WIDTH_20:
3323 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3324 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3326 case NL80211_CHAN_WIDTH_40:
3327 c->width = NL80211_CHAN_WIDTH_20;
3328 c->center_freq1 = c->chan->center_freq;
3329 ret = IEEE80211_STA_DISABLE_40MHZ |
3330 IEEE80211_STA_DISABLE_VHT;
3332 case NL80211_CHAN_WIDTH_80:
3333 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3337 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3338 c->width = NL80211_CHAN_WIDTH_40;
3339 ret = IEEE80211_STA_DISABLE_VHT;
3341 case NL80211_CHAN_WIDTH_80P80:
3342 c->center_freq2 = 0;
3343 c->width = NL80211_CHAN_WIDTH_80;
3344 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3345 IEEE80211_STA_DISABLE_160MHZ;
3347 case NL80211_CHAN_WIDTH_160:
3349 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3352 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3353 c->width = NL80211_CHAN_WIDTH_80;
3354 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3355 IEEE80211_STA_DISABLE_160MHZ;
3358 case NL80211_CHAN_WIDTH_20_NOHT:
3360 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3361 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3365 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3371 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
3372 struct ieee80211_supported_band *sband,
3373 struct ieee80211_channel *channel,
3374 const struct ieee80211_ht_operation *ht_oper,
3375 const struct ieee80211_vht_operation *vht_oper,
3376 struct cfg80211_chan_def *chandef)
3378 struct cfg80211_chan_def vht_chandef;
3381 chandef->chan = channel;
3382 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
3383 chandef->center_freq1 = channel->center_freq;
3384 chandef->center_freq2 = 0;
3386 if (!ht_oper || !sband->ht_cap.ht_supported) {
3387 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3391 chandef->width = NL80211_CHAN_WIDTH_20;
3393 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3395 /* check that channel matches the right operating channel */
3396 if (channel->center_freq != ht_cfreq) {
3398 * It's possible that some APs are confused here;
3399 * Netgear WNDR3700 sometimes reports 4 higher than
3400 * the actual channel in association responses, but
3401 * since we look at probe response/beacon data here
3405 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3406 channel->center_freq, ht_cfreq,
3407 ht_oper->primary_chan, channel->band);
3408 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3412 /* check 40 MHz support, if we have it */
3413 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3414 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3415 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3416 chandef->width = NL80211_CHAN_WIDTH_40;
3417 chandef->center_freq1 += 10;
3419 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3420 chandef->width = NL80211_CHAN_WIDTH_40;
3421 chandef->center_freq1 -= 10;
3425 /* 40 MHz (and 80 MHz) must be supported for VHT */
3426 ret = IEEE80211_STA_DISABLE_VHT;
3430 if (!vht_oper || !sband->vht_cap.vht_supported) {
3431 ret = IEEE80211_STA_DISABLE_VHT;
3435 vht_chandef.chan = channel;
3436 vht_chandef.center_freq1 =
3437 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
3439 vht_chandef.center_freq2 = 0;
3441 if (vht_oper->center_freq_seg2_idx)
3442 vht_chandef.center_freq2 =
3443 ieee80211_channel_to_frequency(
3444 vht_oper->center_freq_seg2_idx,
3447 switch (vht_oper->chan_width) {
3448 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3449 vht_chandef.width = chandef->width;
3451 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3452 vht_chandef.width = NL80211_CHAN_WIDTH_80;
3454 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3455 vht_chandef.width = NL80211_CHAN_WIDTH_160;
3457 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3458 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
3462 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3463 vht_oper->chan_width);
3464 ret = IEEE80211_STA_DISABLE_VHT;
3468 if (!cfg80211_chandef_valid(&vht_chandef)) {
3470 "AP VHT information is invalid, disable VHT\n");
3471 ret = IEEE80211_STA_DISABLE_VHT;
3475 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
3480 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
3482 "AP VHT information doesn't match HT, disable VHT\n");
3483 ret = IEEE80211_STA_DISABLE_VHT;
3487 *chandef = vht_chandef;
3491 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
3492 IEEE80211_CHAN_DISABLED)) {
3493 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
3494 ret = IEEE80211_STA_DISABLE_HT |
3495 IEEE80211_STA_DISABLE_VHT;
3499 ret = chandef_downgrade(chandef);
3502 if (chandef->width != vht_chandef.width)
3504 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3507 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
3511 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3512 struct cfg80211_bss *cbss)
3514 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3515 const u8 *ht_cap_ie, *vht_cap_ie;
3516 const struct ieee80211_ht_cap *ht_cap;
3517 const struct ieee80211_vht_cap *vht_cap;
3520 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3523 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3524 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3525 ht_cap = (void *)(ht_cap_ie + 2);
3526 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3528 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3529 * "Tx Unequal Modulation Supported" fields.
3533 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3536 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3537 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3541 vht_cap = (void *)(vht_cap_ie + 2);
3542 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3543 for (nss = 8; nss > 0; nss--) {
3544 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3545 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3548 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3549 chains = max(chains, nss);
3555 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3556 struct cfg80211_bss *cbss)
3558 struct ieee80211_local *local = sdata->local;
3559 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3560 const struct ieee80211_ht_operation *ht_oper = NULL;
3561 const struct ieee80211_vht_operation *vht_oper = NULL;
3562 struct ieee80211_supported_band *sband;
3563 struct cfg80211_chan_def chandef;
3566 sband = local->hw.wiphy->bands[cbss->channel->band];
3568 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3569 IEEE80211_STA_DISABLE_80P80MHZ |
3570 IEEE80211_STA_DISABLE_160MHZ);
3574 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3575 sband->ht_cap.ht_supported) {
3576 const u8 *ht_oper_ie;
3578 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3579 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3580 ht_oper = (void *)(ht_oper_ie + 2);
3583 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3584 sband->vht_cap.vht_supported) {
3585 const u8 *vht_oper_ie;
3587 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3588 WLAN_EID_VHT_OPERATION);
3589 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3590 vht_oper = (void *)(vht_oper_ie + 2);
3591 if (vht_oper && !ht_oper) {
3594 "AP advertised VHT without HT, disabling both\n");
3595 sdata->flags |= IEEE80211_STA_DISABLE_HT;
3596 sdata->flags |= IEEE80211_STA_DISABLE_VHT;
3600 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3605 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3610 /* will change later if needed */
3611 sdata->smps_mode = IEEE80211_SMPS_OFF;
3614 * If this fails (possibly due to channel context sharing
3615 * on incompatible channels, e.g. 80+80 and 160 sharing the
3616 * same control channel) try to use a smaller bandwidth.
3618 ret = ieee80211_vif_use_channel(sdata, &chandef,
3619 IEEE80211_CHANCTX_SHARED);
3620 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
3621 ifmgd->flags |= chandef_downgrade(&chandef);
3625 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3626 struct cfg80211_bss *cbss, bool assoc)
3628 struct ieee80211_local *local = sdata->local;
3629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3630 struct ieee80211_bss *bss = (void *)cbss->priv;
3631 struct sta_info *new_sta = NULL;
3632 bool have_sta = false;
3635 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3640 have_sta = sta_info_get(sdata, cbss->bssid);
3645 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3651 u32 rates = 0, basic_rates = 0;
3652 bool have_higher_than_11mbit;
3653 int min_rate = INT_MAX, min_rate_index = -1;
3654 struct ieee80211_supported_band *sband;
3655 const struct cfg80211_bss_ies *ies;
3657 sband = local->hw.wiphy->bands[cbss->channel->band];
3659 err = ieee80211_prep_channel(sdata, cbss);
3661 sta_info_free(local, new_sta);
3665 ieee80211_get_rates(sband, bss->supp_rates,
3666 bss->supp_rates_len,
3667 &rates, &basic_rates,
3668 &have_higher_than_11mbit,
3669 &min_rate, &min_rate_index);
3672 * This used to be a workaround for basic rates missing
3673 * in the association response frame. Now that we no
3674 * longer use the basic rates from there, it probably
3675 * doesn't happen any more, but keep the workaround so
3676 * in case some *other* APs are buggy in different ways
3677 * we can connect -- with a warning.
3679 if (!basic_rates && min_rate_index >= 0) {
3681 "No basic rates, using min rate instead\n");
3682 basic_rates = BIT(min_rate_index);
3685 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3686 sdata->vif.bss_conf.basic_rates = basic_rates;
3688 /* cf. IEEE 802.11 9.2.12 */
3689 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3690 have_higher_than_11mbit)
3691 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3693 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3695 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3697 /* set timing information */
3698 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3700 ies = rcu_dereference(cbss->beacon_ies);
3704 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3705 sdata->vif.bss_conf.sync_device_ts =
3706 bss->device_ts_beacon;
3707 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3708 ies->data, ies->len);
3709 if (tim_ie && tim_ie[1] >= 2)
3710 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3712 sdata->vif.bss_conf.sync_dtim_count = 0;
3713 } else if (!(local->hw.flags &
3714 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3715 ies = rcu_dereference(cbss->proberesp_ies);
3716 /* must be non-NULL since beacon IEs were NULL */
3717 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3718 sdata->vif.bss_conf.sync_device_ts =
3719 bss->device_ts_presp;
3720 sdata->vif.bss_conf.sync_dtim_count = 0;
3722 sdata->vif.bss_conf.sync_tsf = 0;
3723 sdata->vif.bss_conf.sync_device_ts = 0;
3724 sdata->vif.bss_conf.sync_dtim_count = 0;
3728 /* tell driver about BSSID, basic rates and timing */
3729 ieee80211_bss_info_change_notify(sdata,
3730 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3731 BSS_CHANGED_BEACON_INT);
3734 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3736 err = sta_info_insert(new_sta);
3740 "failed to insert STA entry for the AP (error %d)\n",
3745 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3751 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3752 struct cfg80211_auth_request *req)
3754 struct ieee80211_local *local = sdata->local;
3755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3756 struct ieee80211_mgd_auth_data *auth_data;
3760 /* prepare auth data structure */
3762 switch (req->auth_type) {
3763 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3764 auth_alg = WLAN_AUTH_OPEN;
3766 case NL80211_AUTHTYPE_SHARED_KEY:
3767 if (IS_ERR(local->wep_tx_tfm))
3769 auth_alg = WLAN_AUTH_SHARED_KEY;
3771 case NL80211_AUTHTYPE_FT:
3772 auth_alg = WLAN_AUTH_FT;
3774 case NL80211_AUTHTYPE_NETWORK_EAP:
3775 auth_alg = WLAN_AUTH_LEAP;
3777 case NL80211_AUTHTYPE_SAE:
3778 auth_alg = WLAN_AUTH_SAE;
3784 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3785 req->ie_len, GFP_KERNEL);
3789 auth_data->bss = req->bss;
3791 if (req->sae_data_len >= 4) {
3792 __le16 *pos = (__le16 *) req->sae_data;
3793 auth_data->sae_trans = le16_to_cpu(pos[0]);
3794 auth_data->sae_status = le16_to_cpu(pos[1]);
3795 memcpy(auth_data->data, req->sae_data + 4,
3796 req->sae_data_len - 4);
3797 auth_data->data_len += req->sae_data_len - 4;
3800 if (req->ie && req->ie_len) {
3801 memcpy(&auth_data->data[auth_data->data_len],
3802 req->ie, req->ie_len);
3803 auth_data->data_len += req->ie_len;
3806 if (req->key && req->key_len) {
3807 auth_data->key_len = req->key_len;
3808 auth_data->key_idx = req->key_idx;
3809 memcpy(auth_data->key, req->key, req->key_len);
3812 auth_data->algorithm = auth_alg;
3814 /* try to authenticate/probe */
3816 mutex_lock(&ifmgd->mtx);
3818 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3819 ifmgd->assoc_data) {
3824 if (ifmgd->auth_data)
3825 ieee80211_destroy_auth_data(sdata, false);
3827 /* prep auth_data so we don't go into idle on disassoc */
3828 ifmgd->auth_data = auth_data;
3830 if (ifmgd->associated)
3831 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3833 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
3835 err = ieee80211_prep_connection(sdata, req->bss, false);
3839 err = ieee80211_probe_auth(sdata);
3841 sta_info_destroy_addr(sdata, req->bss->bssid);
3845 /* hold our own reference */
3846 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
3851 memset(ifmgd->bssid, 0, ETH_ALEN);
3852 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3853 ifmgd->auth_data = NULL;
3857 mutex_unlock(&ifmgd->mtx);
3862 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3863 struct cfg80211_assoc_request *req)
3865 struct ieee80211_local *local = sdata->local;
3866 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3867 struct ieee80211_bss *bss = (void *)req->bss->priv;
3868 struct ieee80211_mgd_assoc_data *assoc_data;
3869 const struct cfg80211_bss_ies *beacon_ies;
3870 struct ieee80211_supported_band *sband;
3871 const u8 *ssidie, *ht_ie, *vht_ie;
3874 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3879 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3885 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3886 assoc_data->ssid_len = ssidie[1];
3889 mutex_lock(&ifmgd->mtx);
3891 if (ifmgd->associated)
3892 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3894 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3899 if (ifmgd->assoc_data) {
3904 if (ifmgd->auth_data) {
3907 /* keep sta info, bssid if matching */
3908 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3909 ieee80211_destroy_auth_data(sdata, match);
3912 /* prepare assoc data */
3914 ifmgd->beacon_crc_valid = false;
3917 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3918 * We still associate in non-HT mode (11a/b/g) if any one of these
3919 * ciphers is configured as pairwise.
3920 * We can set this to true for non-11n hardware, that'll be checked
3921 * separately along with the peer capabilities.
3923 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
3924 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3925 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3926 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
3927 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3928 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3929 netdev_info(sdata->dev,
3930 "disabling HT/VHT due to WEP/TKIP use\n");
3934 if (req->flags & ASSOC_REQ_DISABLE_HT) {
3935 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3936 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3939 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3940 sband = local->hw.wiphy->bands[req->bss->channel->band];
3941 if (!sband->ht_cap.ht_supported ||
3942 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3943 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3945 netdev_info(sdata->dev,
3946 "disabling HT as WMM/QoS is not supported by the AP\n");
3949 /* disable VHT if we don't support it or the AP doesn't use WMM */
3950 if (!sband->vht_cap.vht_supported ||
3951 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3952 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3954 netdev_info(sdata->dev,
3955 "disabling VHT as WMM/QoS is not supported by the AP\n");
3958 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3959 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3960 sizeof(ifmgd->ht_capa_mask));
3962 if (req->ie && req->ie_len) {
3963 memcpy(assoc_data->ie, req->ie, req->ie_len);
3964 assoc_data->ie_len = req->ie_len;
3967 assoc_data->bss = req->bss;
3969 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3970 if (ifmgd->powersave)
3971 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
3973 sdata->smps_mode = IEEE80211_SMPS_OFF;
3975 sdata->smps_mode = ifmgd->req_smps;
3977 assoc_data->capability = req->bss->capability;
3978 assoc_data->wmm = bss->wmm_used &&
3979 (local->hw.queues >= IEEE80211_NUM_ACS);
3980 assoc_data->supp_rates = bss->supp_rates;
3981 assoc_data->supp_rates_len = bss->supp_rates_len;
3984 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3985 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3986 assoc_data->ap_ht_param =
3987 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3989 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3990 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
3991 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
3992 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
3993 sizeof(struct ieee80211_vht_cap));
3995 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3998 if (bss->wmm_used && bss->uapsd_supported &&
3999 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
4000 assoc_data->uapsd = true;
4001 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4003 assoc_data->uapsd = false;
4004 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4007 if (req->prev_bssid)
4008 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4011 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4012 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4014 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4015 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4018 if (req->crypto.control_port)
4019 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4021 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4023 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4024 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4026 /* kick off associate process */
4028 ifmgd->assoc_data = assoc_data;
4029 ifmgd->dtim_period = 0;
4031 err = ieee80211_prep_connection(sdata, req->bss, true);
4036 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4038 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4041 * Wait up to one beacon interval ...
4042 * should this be more if we miss one?
4044 sdata_info(sdata, "waiting for beacon from %pM\n",
4046 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4047 assoc_data->timeout_started = true;
4048 assoc_data->need_beacon = true;
4049 } else if (beacon_ies) {
4050 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4055 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4056 const struct ieee80211_tim_ie *tim;
4057 tim = (void *)(tim_ie + 2);
4058 ifmgd->dtim_period = tim->dtim_period;
4059 dtim_count = tim->dtim_count;
4061 assoc_data->have_beacon = true;
4062 assoc_data->timeout = jiffies;
4063 assoc_data->timeout_started = true;
4065 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4066 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4067 sdata->vif.bss_conf.sync_device_ts =
4068 bss->device_ts_beacon;
4069 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4072 assoc_data->timeout = jiffies;
4073 assoc_data->timeout_started = true;
4077 run_again(ifmgd, assoc_data->timeout);
4079 if (bss->corrupt_data) {
4080 char *corrupt_type = "data";
4081 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4082 if (bss->corrupt_data &
4083 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4084 corrupt_type = "beacon and probe response";
4086 corrupt_type = "beacon";
4087 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4088 corrupt_type = "probe response";
4089 sdata_info(sdata, "associating with AP with corrupt %s\n",
4096 memset(ifmgd->bssid, 0, ETH_ALEN);
4097 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4098 ifmgd->assoc_data = NULL;
4102 mutex_unlock(&ifmgd->mtx);
4107 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4108 struct cfg80211_deauth_request *req)
4110 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4111 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4112 bool tx = !req->local_state_change;
4113 bool sent_frame = false;
4115 mutex_lock(&ifmgd->mtx);
4118 "deauthenticating from %pM by local choice (reason=%d)\n",
4119 req->bssid, req->reason_code);
4121 if (ifmgd->auth_data) {
4122 drv_mgd_prepare_tx(sdata->local, sdata);
4123 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4124 IEEE80211_STYPE_DEAUTH,
4125 req->reason_code, tx,
4127 ieee80211_destroy_auth_data(sdata, false);
4128 mutex_unlock(&ifmgd->mtx);
4134 if (ifmgd->associated &&
4135 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4136 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4137 req->reason_code, tx, frame_buf);
4140 mutex_unlock(&ifmgd->mtx);
4144 __cfg80211_send_deauth(sdata->dev, frame_buf,
4145 IEEE80211_DEAUTH_FRAME_LEN);
4150 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4151 struct cfg80211_disassoc_request *req)
4153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4155 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4157 mutex_lock(&ifmgd->mtx);
4160 * cfg80211 should catch this ... but it's racy since
4161 * we can receive a disassoc frame, process it, hand it
4162 * to cfg80211 while that's in a locked section already
4163 * trying to tell us that the user wants to disconnect.
4165 if (ifmgd->associated != req->bss) {
4166 mutex_unlock(&ifmgd->mtx);
4171 "disassociating from %pM by local choice (reason=%d)\n",
4172 req->bss->bssid, req->reason_code);
4174 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4175 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4176 req->reason_code, !req->local_state_change,
4178 mutex_unlock(&ifmgd->mtx);
4180 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4181 IEEE80211_DEAUTH_FRAME_LEN);
4186 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4188 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4190 mutex_lock(&ifmgd->mtx);
4191 if (ifmgd->assoc_data)
4192 ieee80211_destroy_assoc_data(sdata, false);
4193 if (ifmgd->auth_data)
4194 ieee80211_destroy_auth_data(sdata, false);
4195 del_timer_sync(&ifmgd->timer);
4196 mutex_unlock(&ifmgd->mtx);
4199 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4200 enum nl80211_cqm_rssi_threshold_event rssi_event,
4203 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4205 trace_api_cqm_rssi_notify(sdata, rssi_event);
4207 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4209 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);