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 static int beacon_loss_count = 7;
60 module_param(beacon_loss_count, int, 0644);
61 MODULE_PARM_DESC(beacon_loss_count,
62 "Number of beacon intervals before we decide beacon was lost.");
65 * Time the connection can be idle before we probe
66 * it to see if we can still talk to the AP.
68 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
70 * Time we wait for a probe response after sending
71 * a probe request because of beacon loss or for
72 * checking the connection still works.
74 static int probe_wait_ms = 500;
75 module_param(probe_wait_ms, int, 0644);
76 MODULE_PARM_DESC(probe_wait_ms,
77 "Maximum time(ms) to wait for probe response"
78 " before disconnecting (reason 4).");
81 * Weight given to the latest Beacon frame when calculating average signal
82 * strength for Beacon frames received in the current BSS. This must be
85 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
88 * How many Beacon frames need to have been used in average signal strength
89 * before starting to indicate signal change events.
91 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
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,
118 /* used when a processed beacon causes a deauth */
119 RX_MGMT_CFG80211_TX_DEAUTH,
123 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
125 lockdep_assert_held(&ifmgd->mtx);
129 * We can have multiple work items (and connection probing)
130 * scheduling this timer, but we need to take care to only
131 * reschedule it when it should fire _earlier_ than it was
132 * asked for before, or if it's not pending right now. This
133 * function ensures that. Note that it then is required to
134 * run this function for all timeouts after the first one
135 * has happened -- the work that runs from this timer will
138 static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
140 ASSERT_MGD_MTX(ifmgd);
142 if (!timer_pending(&ifmgd->timer) ||
143 time_before(timeout, ifmgd->timer.expires))
144 mod_timer(&ifmgd->timer, timeout);
147 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
149 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
152 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
155 mod_timer(&sdata->u.mgd.bcn_mon_timer,
156 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
159 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
163 if (unlikely(!sdata->u.mgd.associated))
166 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
169 mod_timer(&sdata->u.mgd.conn_mon_timer,
170 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
172 ifmgd->probe_send_count = 0;
175 static int ecw2cw(int ecw)
177 return (1 << ecw) - 1;
180 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
186 case NL80211_CHAN_WIDTH_20:
187 c->width = NL80211_CHAN_WIDTH_20_NOHT;
188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
190 case NL80211_CHAN_WIDTH_40:
191 c->width = NL80211_CHAN_WIDTH_20;
192 c->center_freq1 = c->chan->center_freq;
193 ret = IEEE80211_STA_DISABLE_40MHZ |
194 IEEE80211_STA_DISABLE_VHT;
196 case NL80211_CHAN_WIDTH_80:
197 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
201 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
202 c->width = NL80211_CHAN_WIDTH_40;
203 ret = IEEE80211_STA_DISABLE_VHT;
205 case NL80211_CHAN_WIDTH_80P80:
207 c->width = NL80211_CHAN_WIDTH_80;
208 ret = IEEE80211_STA_DISABLE_80P80MHZ |
209 IEEE80211_STA_DISABLE_160MHZ;
211 case NL80211_CHAN_WIDTH_160:
213 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
216 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
217 c->width = NL80211_CHAN_WIDTH_80;
218 ret = IEEE80211_STA_DISABLE_80P80MHZ |
219 IEEE80211_STA_DISABLE_160MHZ;
222 case NL80211_CHAN_WIDTH_20_NOHT:
224 c->width = NL80211_CHAN_WIDTH_20_NOHT;
225 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
229 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
235 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
236 struct ieee80211_supported_band *sband,
237 struct ieee80211_channel *channel,
238 const struct ieee80211_ht_operation *ht_oper,
239 const struct ieee80211_vht_operation *vht_oper,
240 struct cfg80211_chan_def *chandef, bool verbose)
242 struct cfg80211_chan_def vht_chandef;
245 chandef->chan = channel;
246 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
247 chandef->center_freq1 = channel->center_freq;
248 chandef->center_freq2 = 0;
250 if (!ht_oper || !sband->ht_cap.ht_supported) {
251 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
255 chandef->width = NL80211_CHAN_WIDTH_20;
257 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
259 /* check that channel matches the right operating channel */
260 if (channel->center_freq != ht_cfreq) {
262 * It's possible that some APs are confused here;
263 * Netgear WNDR3700 sometimes reports 4 higher than
264 * the actual channel in association responses, but
265 * since we look at probe response/beacon data here
270 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
271 channel->center_freq, ht_cfreq,
272 ht_oper->primary_chan, channel->band);
273 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
277 /* check 40 MHz support, if we have it */
278 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
279 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 chandef->width = NL80211_CHAN_WIDTH_40;
282 chandef->center_freq1 += 10;
284 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
285 chandef->width = NL80211_CHAN_WIDTH_40;
286 chandef->center_freq1 -= 10;
290 /* 40 MHz (and 80 MHz) must be supported for VHT */
291 ret = IEEE80211_STA_DISABLE_VHT;
295 if (!vht_oper || !sband->vht_cap.vht_supported) {
296 ret = IEEE80211_STA_DISABLE_VHT;
300 vht_chandef.chan = channel;
301 vht_chandef.center_freq1 =
302 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
304 vht_chandef.center_freq2 = 0;
306 if (vht_oper->center_freq_seg2_idx)
307 vht_chandef.center_freq2 =
308 ieee80211_channel_to_frequency(
309 vht_oper->center_freq_seg2_idx,
312 switch (vht_oper->chan_width) {
313 case IEEE80211_VHT_CHANWIDTH_USE_HT:
314 vht_chandef.width = chandef->width;
316 case IEEE80211_VHT_CHANWIDTH_80MHZ:
317 vht_chandef.width = NL80211_CHAN_WIDTH_80;
319 case IEEE80211_VHT_CHANWIDTH_160MHZ:
320 vht_chandef.width = NL80211_CHAN_WIDTH_160;
322 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
323 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
328 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
329 vht_oper->chan_width);
330 ret = IEEE80211_STA_DISABLE_VHT;
334 if (!cfg80211_chandef_valid(&vht_chandef)) {
337 "AP VHT information is invalid, disable VHT\n");
338 ret = IEEE80211_STA_DISABLE_VHT;
342 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
347 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
350 "AP VHT information doesn't match HT, disable VHT\n");
351 ret = IEEE80211_STA_DISABLE_VHT;
355 *chandef = vht_chandef;
360 /* don't print the message below for VHT mismatch if VHT is disabled */
361 if (ret & IEEE80211_STA_DISABLE_VHT)
362 vht_chandef = *chandef;
364 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
365 IEEE80211_CHAN_DISABLED)) {
366 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
367 ret = IEEE80211_STA_DISABLE_HT |
368 IEEE80211_STA_DISABLE_VHT;
372 ret |= chandef_downgrade(chandef);
375 if (chandef->width != vht_chandef.width && verbose)
377 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
379 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
383 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
384 struct sta_info *sta,
385 const struct ieee80211_ht_operation *ht_oper,
386 const struct ieee80211_vht_operation *vht_oper,
387 const u8 *bssid, u32 *changed)
389 struct ieee80211_local *local = sdata->local;
390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
391 struct ieee80211_supported_band *sband;
392 struct ieee80211_channel *chan;
393 struct cfg80211_chan_def chandef;
396 enum ieee80211_sta_rx_bandwidth new_sta_bw;
399 /* if HT was/is disabled, don't track any bandwidth changes */
400 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
403 /* don't check VHT if we associated as non-VHT station */
404 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
407 if (WARN_ON_ONCE(!sta))
410 chan = sdata->vif.bss_conf.chandef.chan;
411 sband = local->hw.wiphy->bands[chan->band];
413 /* calculate new channel (type) based on HT/VHT operation IEs */
414 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
415 vht_oper, &chandef, false);
418 * Downgrade the new channel if we associated with restricted
419 * capabilities. For example, if we associated as a 20 MHz STA
420 * to a 40 MHz AP (due to regulatory, capabilities or config
421 * reasons) then switching to a 40 MHz channel now won't do us
422 * any good -- we couldn't use it with the AP.
424 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
425 chandef.width == NL80211_CHAN_WIDTH_80P80)
426 flags |= chandef_downgrade(&chandef);
427 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
428 chandef.width == NL80211_CHAN_WIDTH_160)
429 flags |= chandef_downgrade(&chandef);
430 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
431 chandef.width > NL80211_CHAN_WIDTH_20)
432 flags |= chandef_downgrade(&chandef);
434 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
438 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
439 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
440 chandef.center_freq1, chandef.center_freq2);
442 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
443 IEEE80211_STA_DISABLE_VHT |
444 IEEE80211_STA_DISABLE_40MHZ |
445 IEEE80211_STA_DISABLE_80P80MHZ |
446 IEEE80211_STA_DISABLE_160MHZ)) ||
447 !cfg80211_chandef_valid(&chandef)) {
449 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
454 switch (chandef.width) {
455 case NL80211_CHAN_WIDTH_20_NOHT:
456 case NL80211_CHAN_WIDTH_20:
457 new_sta_bw = IEEE80211_STA_RX_BW_20;
459 case NL80211_CHAN_WIDTH_40:
460 new_sta_bw = IEEE80211_STA_RX_BW_40;
462 case NL80211_CHAN_WIDTH_80:
463 new_sta_bw = IEEE80211_STA_RX_BW_80;
465 case NL80211_CHAN_WIDTH_80P80:
466 case NL80211_CHAN_WIDTH_160:
467 new_sta_bw = IEEE80211_STA_RX_BW_160;
473 if (new_sta_bw > sta->cur_max_bandwidth)
474 new_sta_bw = sta->cur_max_bandwidth;
476 if (new_sta_bw < sta->sta.bandwidth) {
477 sta->sta.bandwidth = new_sta_bw;
478 rate_control_rate_update(local, sband, sta,
479 IEEE80211_RC_BW_CHANGED);
482 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
485 "AP %pM changed bandwidth to incompatible one - disconnect\n",
490 if (new_sta_bw > sta->sta.bandwidth) {
491 sta->sta.bandwidth = new_sta_bw;
492 rate_control_rate_update(local, sband, sta,
493 IEEE80211_RC_BW_CHANGED);
496 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
498 /* if bss configuration changed store the new one */
499 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
500 *changed |= BSS_CHANGED_HT;
501 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
507 /* frame sending functions */
509 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
510 struct ieee80211_supported_band *sband,
516 for (i = 0; i < supp_rates_len; i++) {
517 int rate = (supp_rates[i] & 0x7F) * 5;
519 for (j = 0; j < sband->n_bitrates; j++)
520 if (sband->bitrates[j].bitrate == rate) {
530 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
531 struct sk_buff *skb, u8 ap_ht_param,
532 struct ieee80211_supported_band *sband,
533 struct ieee80211_channel *channel,
534 enum ieee80211_smps_mode smps)
537 u32 flags = channel->flags;
539 struct ieee80211_sta_ht_cap ht_cap;
541 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
543 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
544 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
546 /* determine capability flags */
549 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
550 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
551 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
552 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
553 cap &= ~IEEE80211_HT_CAP_SGI_40;
556 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
557 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
558 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
559 cap &= ~IEEE80211_HT_CAP_SGI_40;
565 * If 40 MHz was disabled associate as though we weren't
566 * capable of 40 MHz -- some broken APs will never fall
567 * back to trying to transmit in 20 MHz.
569 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
570 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
571 cap &= ~IEEE80211_HT_CAP_SGI_40;
574 /* set SM PS mode properly */
575 cap &= ~IEEE80211_HT_CAP_SM_PS;
577 case IEEE80211_SMPS_AUTOMATIC:
578 case IEEE80211_SMPS_NUM_MODES:
580 case IEEE80211_SMPS_OFF:
581 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
582 IEEE80211_HT_CAP_SM_PS_SHIFT;
584 case IEEE80211_SMPS_STATIC:
585 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
586 IEEE80211_HT_CAP_SM_PS_SHIFT;
588 case IEEE80211_SMPS_DYNAMIC:
589 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
590 IEEE80211_HT_CAP_SM_PS_SHIFT;
594 /* reserve and fill IE */
595 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
596 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
599 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
601 struct ieee80211_supported_band *sband,
602 struct ieee80211_vht_cap *ap_vht_cap)
606 struct ieee80211_sta_vht_cap vht_cap;
609 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
611 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
612 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
614 /* determine capability flags */
617 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
618 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
619 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
622 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
623 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
624 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
628 * Some APs apparently get confused if our capabilities are better
629 * than theirs, so restrict what we advertise in the assoc request.
631 if (!(ap_vht_cap->vht_cap_info &
632 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
633 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
635 if (!(ap_vht_cap->vht_cap_info &
636 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
637 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
638 IEEE80211_VHT_CAP_RXSTBC_3 |
639 IEEE80211_VHT_CAP_RXSTBC_4);
641 for (i = 0; i < 8; i++) {
643 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
646 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
648 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
651 if (our_mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED)
656 if (our_mcs <= ap_mcs)
659 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
660 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
661 vht_cap.vht_mcs.rx_mcs_map |=
662 cpu_to_le16(ap_mcs << shift);
666 /* reserve and fill IE */
667 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
668 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
671 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
673 struct ieee80211_local *local = sdata->local;
674 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
675 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
677 struct ieee80211_mgmt *mgmt;
679 size_t offset = 0, noffset;
680 int i, count, rates_len, supp_rates_len;
682 struct ieee80211_supported_band *sband;
683 struct ieee80211_chanctx_conf *chanctx_conf;
684 struct ieee80211_channel *chan;
687 lockdep_assert_held(&ifmgd->mtx);
690 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
691 if (WARN_ON(!chanctx_conf)) {
695 chan = chanctx_conf->def.chan;
697 sband = local->hw.wiphy->bands[chan->band];
699 if (assoc_data->supp_rates_len) {
701 * Get all rates supported by the device and the AP as
702 * some APs don't like getting a superset of their rates
703 * in the association request (e.g. D-Link DAP 1353 in
706 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
707 assoc_data->supp_rates_len,
711 * In case AP not provide any supported rates information
712 * before association, we send information element(s) with
713 * all rates that we support.
716 rates_len = sband->n_bitrates;
719 skb = alloc_skb(local->hw.extra_tx_headroom +
720 sizeof(*mgmt) + /* bit too much but doesn't matter */
721 2 + assoc_data->ssid_len + /* SSID */
722 4 + rates_len + /* (extended) rates */
723 4 + /* power capability */
724 2 + 2 * sband->n_channels + /* supported channels */
725 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
726 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
727 assoc_data->ie_len + /* extra IEs */
733 skb_reserve(skb, local->hw.extra_tx_headroom);
735 capab = WLAN_CAPABILITY_ESS;
737 if (sband->band == IEEE80211_BAND_2GHZ) {
738 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
739 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
740 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
741 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
744 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
745 capab |= WLAN_CAPABILITY_PRIVACY;
747 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
748 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
749 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
751 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
753 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
754 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
755 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
757 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
759 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
760 IEEE80211_STYPE_REASSOC_REQ);
761 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
762 mgmt->u.reassoc_req.listen_interval =
763 cpu_to_le16(local->hw.conf.listen_interval);
764 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
768 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
769 IEEE80211_STYPE_ASSOC_REQ);
770 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
771 mgmt->u.assoc_req.listen_interval =
772 cpu_to_le16(local->hw.conf.listen_interval);
776 pos = skb_put(skb, 2 + assoc_data->ssid_len);
777 *pos++ = WLAN_EID_SSID;
778 *pos++ = assoc_data->ssid_len;
779 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
781 /* add all rates which were marked to be used above */
782 supp_rates_len = rates_len;
783 if (supp_rates_len > 8)
786 pos = skb_put(skb, supp_rates_len + 2);
787 *pos++ = WLAN_EID_SUPP_RATES;
788 *pos++ = supp_rates_len;
791 for (i = 0; i < sband->n_bitrates; i++) {
792 if (BIT(i) & rates) {
793 int rate = sband->bitrates[i].bitrate;
794 *pos++ = (u8) (rate / 5);
800 if (rates_len > count) {
801 pos = skb_put(skb, rates_len - count + 2);
802 *pos++ = WLAN_EID_EXT_SUPP_RATES;
803 *pos++ = rates_len - count;
805 for (i++; i < sband->n_bitrates; i++) {
806 if (BIT(i) & rates) {
807 int rate = sband->bitrates[i].bitrate;
808 *pos++ = (u8) (rate / 5);
813 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
814 /* 1. power capabilities */
815 pos = skb_put(skb, 4);
816 *pos++ = WLAN_EID_PWR_CAPABILITY;
818 *pos++ = 0; /* min tx power */
819 *pos++ = chan->max_power; /* max tx power */
821 /* 2. supported channels */
822 /* TODO: get this in reg domain format */
823 pos = skb_put(skb, 2 * sband->n_channels + 2);
824 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
825 *pos++ = 2 * sband->n_channels;
826 for (i = 0; i < sband->n_channels; i++) {
827 *pos++ = ieee80211_frequency_to_channel(
828 sband->channels[i].center_freq);
829 *pos++ = 1; /* one channel in the subband*/
833 /* if present, add any custom IEs that go before HT */
834 if (assoc_data->ie_len && assoc_data->ie) {
835 static const u8 before_ht[] = {
838 WLAN_EID_EXT_SUPP_RATES,
839 WLAN_EID_PWR_CAPABILITY,
840 WLAN_EID_SUPPORTED_CHANNELS,
843 WLAN_EID_RRM_ENABLED_CAPABILITIES,
844 WLAN_EID_MOBILITY_DOMAIN,
845 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
847 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
848 before_ht, ARRAY_SIZE(before_ht),
850 pos = skb_put(skb, noffset - offset);
851 memcpy(pos, assoc_data->ie + offset, noffset - offset);
855 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
856 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
857 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
859 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
860 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
861 sband, chan, sdata->smps_mode);
863 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
864 ieee80211_add_vht_ie(sdata, skb, sband,
865 &assoc_data->ap_vht_cap);
867 /* if present, add any custom non-vendor IEs that go after HT */
868 if (assoc_data->ie_len && assoc_data->ie) {
869 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
872 pos = skb_put(skb, noffset - offset);
873 memcpy(pos, assoc_data->ie + offset, noffset - offset);
877 if (assoc_data->wmm) {
878 if (assoc_data->uapsd) {
879 qos_info = ifmgd->uapsd_queues;
880 qos_info |= (ifmgd->uapsd_max_sp_len <<
881 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
886 pos = skb_put(skb, 9);
887 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
888 *pos++ = 7; /* len */
889 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
892 *pos++ = 2; /* WME */
893 *pos++ = 0; /* WME info */
894 *pos++ = 1; /* WME ver */
898 /* add any remaining custom (i.e. vendor specific here) IEs */
899 if (assoc_data->ie_len && assoc_data->ie) {
900 noffset = assoc_data->ie_len;
901 pos = skb_put(skb, noffset - offset);
902 memcpy(pos, assoc_data->ie + offset, noffset - offset);
905 drv_mgd_prepare_tx(local, sdata);
907 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
908 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
909 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
910 IEEE80211_TX_INTFL_MLME_CONN_TX;
911 ieee80211_tx_skb(sdata, skb);
914 void ieee80211_send_pspoll(struct ieee80211_local *local,
915 struct ieee80211_sub_if_data *sdata)
917 struct ieee80211_pspoll *pspoll;
920 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
924 pspoll = (struct ieee80211_pspoll *) skb->data;
925 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
927 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
928 ieee80211_tx_skb(sdata, skb);
931 void ieee80211_send_nullfunc(struct ieee80211_local *local,
932 struct ieee80211_sub_if_data *sdata,
936 struct ieee80211_hdr_3addr *nullfunc;
937 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
939 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
943 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
945 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
947 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
948 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
949 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
950 IEEE80211_STA_CONNECTION_POLL))
951 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
953 ieee80211_tx_skb(sdata, skb);
956 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
957 struct ieee80211_sub_if_data *sdata)
960 struct ieee80211_hdr *nullfunc;
963 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
966 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
970 skb_reserve(skb, local->hw.extra_tx_headroom);
972 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
973 memset(nullfunc, 0, 30);
974 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
975 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
976 nullfunc->frame_control = fc;
977 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
978 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
979 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
980 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
982 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
983 ieee80211_tx_skb(sdata, skb);
986 /* spectrum management related things */
987 static void ieee80211_chswitch_work(struct work_struct *work)
989 struct ieee80211_sub_if_data *sdata =
990 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
991 struct ieee80211_local *local = sdata->local;
992 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
994 if (!ieee80211_sdata_running(sdata))
997 mutex_lock(&ifmgd->mtx);
998 if (!ifmgd->associated)
1002 * FIXME: Here we are downgrading to NL80211_CHAN_WIDTH_20_NOHT
1003 * and don't adjust our ht/vht settings
1004 * This is wrong - we should behave according to the CSA params
1006 local->_oper_chandef.chan = local->csa_channel;
1007 local->_oper_chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
1008 local->_oper_chandef.center_freq1 =
1009 local->_oper_chandef.chan->center_freq;
1010 local->_oper_chandef.center_freq2 = 0;
1012 if (!local->ops->channel_switch) {
1013 /* call "hw_config" only if doing sw channel switch */
1014 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1016 /* update the device channel directly */
1017 local->hw.conf.chandef = local->_oper_chandef;
1020 /* XXX: shouldn't really modify cfg80211-owned data! */
1021 ifmgd->associated->channel = local->_oper_chandef.chan;
1023 /* XXX: wait for a beacon first? */
1024 ieee80211_wake_queues_by_reason(&local->hw,
1025 IEEE80211_MAX_QUEUE_MAP,
1026 IEEE80211_QUEUE_STOP_REASON_CSA);
1028 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1029 mutex_unlock(&ifmgd->mtx);
1032 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1034 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1037 trace_api_chswitch_done(sdata, success);
1040 "driver channel switch failed, disconnecting\n");
1041 ieee80211_queue_work(&sdata->local->hw,
1042 &ifmgd->csa_connection_drop_work);
1044 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1047 EXPORT_SYMBOL(ieee80211_chswitch_done);
1049 static void ieee80211_chswitch_timer(unsigned long data)
1051 struct ieee80211_sub_if_data *sdata =
1052 (struct ieee80211_sub_if_data *) data;
1054 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1058 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1059 const struct ieee80211_channel_sw_ie *sw_elem,
1060 struct ieee80211_bss *bss, u64 timestamp)
1062 struct cfg80211_bss *cbss =
1063 container_of((void *)bss, struct cfg80211_bss, priv);
1064 struct ieee80211_channel *new_ch;
1065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1066 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
1067 cbss->channel->band);
1068 struct ieee80211_chanctx *chanctx;
1070 ASSERT_MGD_MTX(ifmgd);
1072 if (!ifmgd->associated)
1075 if (sdata->local->scanning)
1078 /* Disregard subsequent beacons if we are already running a timer
1081 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1084 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1085 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
1087 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1088 ifmgd->associated->bssid, new_freq);
1089 ieee80211_queue_work(&sdata->local->hw,
1090 &ifmgd->csa_connection_drop_work);
1094 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1096 if (sdata->local->use_chanctx) {
1098 "not handling channel switch with channel contexts\n");
1099 ieee80211_queue_work(&sdata->local->hw,
1100 &ifmgd->csa_connection_drop_work);
1104 mutex_lock(&sdata->local->chanctx_mtx);
1105 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1106 mutex_unlock(&sdata->local->chanctx_mtx);
1109 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1110 struct ieee80211_chanctx, conf);
1111 if (chanctx->refcount > 1) {
1113 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1114 ieee80211_queue_work(&sdata->local->hw,
1115 &ifmgd->csa_connection_drop_work);
1116 mutex_unlock(&sdata->local->chanctx_mtx);
1119 mutex_unlock(&sdata->local->chanctx_mtx);
1121 sdata->local->csa_channel = new_ch;
1124 ieee80211_stop_queues_by_reason(&sdata->local->hw,
1125 IEEE80211_MAX_QUEUE_MAP,
1126 IEEE80211_QUEUE_STOP_REASON_CSA);
1128 if (sdata->local->ops->channel_switch) {
1129 /* use driver's channel switch callback */
1130 struct ieee80211_channel_switch ch_switch = {
1131 .timestamp = timestamp,
1132 .block_tx = sw_elem->mode,
1134 .count = sw_elem->count,
1137 drv_channel_switch(sdata->local, &ch_switch);
1141 /* channel switch handled in software */
1142 if (sw_elem->count <= 1)
1143 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1145 mod_timer(&ifmgd->chswitch_timer,
1146 TU_TO_EXP_TIME(sw_elem->count *
1147 cbss->beacon_interval));
1150 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1151 struct ieee80211_channel *channel,
1152 const u8 *country_ie, u8 country_ie_len,
1153 const u8 *pwr_constr_elem)
1155 struct ieee80211_country_ie_triplet *triplet;
1156 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1157 int i, chan_pwr, chan_increment, new_ap_level;
1158 bool have_chan_pwr = false;
1161 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1164 triplet = (void *)(country_ie + 3);
1165 country_ie_len -= 3;
1167 switch (channel->band) {
1171 case IEEE80211_BAND_2GHZ:
1172 case IEEE80211_BAND_60GHZ:
1175 case IEEE80211_BAND_5GHZ:
1181 while (country_ie_len >= 3) {
1182 u8 first_channel = triplet->chans.first_channel;
1184 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1187 for (i = 0; i < triplet->chans.num_channels; i++) {
1188 if (first_channel + i * chan_increment == chan) {
1189 have_chan_pwr = true;
1190 chan_pwr = triplet->chans.max_power;
1199 country_ie_len -= 3;
1205 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1207 if (sdata->ap_power_level == new_ap_level)
1211 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1212 new_ap_level, chan_pwr, *pwr_constr_elem,
1213 sdata->u.mgd.bssid);
1214 sdata->ap_power_level = new_ap_level;
1215 if (__ieee80211_recalc_txpower(sdata))
1216 return BSS_CHANGED_TXPOWER;
1221 static void ieee80211_enable_ps(struct ieee80211_local *local,
1222 struct ieee80211_sub_if_data *sdata)
1224 struct ieee80211_conf *conf = &local->hw.conf;
1227 * If we are scanning right now then the parameters will
1228 * take effect when scan finishes.
1230 if (local->scanning)
1233 if (conf->dynamic_ps_timeout > 0 &&
1234 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1235 mod_timer(&local->dynamic_ps_timer, jiffies +
1236 msecs_to_jiffies(conf->dynamic_ps_timeout));
1238 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1239 ieee80211_send_nullfunc(local, sdata, 1);
1241 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1242 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1245 conf->flags |= IEEE80211_CONF_PS;
1246 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1250 static void ieee80211_change_ps(struct ieee80211_local *local)
1252 struct ieee80211_conf *conf = &local->hw.conf;
1254 if (local->ps_sdata) {
1255 ieee80211_enable_ps(local, local->ps_sdata);
1256 } else if (conf->flags & IEEE80211_CONF_PS) {
1257 conf->flags &= ~IEEE80211_CONF_PS;
1258 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1259 del_timer_sync(&local->dynamic_ps_timer);
1260 cancel_work_sync(&local->dynamic_ps_enable_work);
1264 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1266 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1267 struct sta_info *sta = NULL;
1268 bool authorized = false;
1270 if (!mgd->powersave)
1276 if (!mgd->associated)
1279 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1280 IEEE80211_STA_CONNECTION_POLL))
1284 sta = sta_info_get(sdata, mgd->bssid);
1286 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1292 /* need to hold RTNL or interface lock */
1293 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1295 struct ieee80211_sub_if_data *sdata, *found = NULL;
1299 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1300 local->ps_sdata = NULL;
1304 list_for_each_entry(sdata, &local->interfaces, list) {
1305 if (!ieee80211_sdata_running(sdata))
1307 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1308 /* If an AP vif is found, then disable PS
1309 * by setting the count to zero thereby setting
1315 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1321 if (count == 1 && ieee80211_powersave_allowed(found)) {
1325 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1327 beaconint_us = ieee80211_tu_to_usec(
1328 found->vif.bss_conf.beacon_int);
1330 timeout = local->dynamic_ps_forced_timeout;
1333 * Go to full PSM if the user configures a very low
1334 * latency requirement.
1335 * The 2000 second value is there for compatibility
1336 * until the PM_QOS_NETWORK_LATENCY is configured
1339 if (latency > (1900 * USEC_PER_MSEC) &&
1340 latency != (2000 * USEC_PER_SEC))
1345 local->hw.conf.dynamic_ps_timeout = timeout;
1347 if (beaconint_us > latency) {
1348 local->ps_sdata = NULL;
1351 u8 dtimper = found->u.mgd.dtim_period;
1353 /* If the TIM IE is invalid, pretend the value is 1 */
1356 else if (dtimper > 1)
1357 maxslp = min_t(int, dtimper,
1358 latency / beaconint_us);
1360 local->hw.conf.max_sleep_period = maxslp;
1361 local->hw.conf.ps_dtim_period = dtimper;
1362 local->ps_sdata = found;
1365 local->ps_sdata = NULL;
1368 ieee80211_change_ps(local);
1371 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1373 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1375 if (sdata->vif.bss_conf.ps != ps_allowed) {
1376 sdata->vif.bss_conf.ps = ps_allowed;
1377 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1381 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1383 struct ieee80211_local *local =
1384 container_of(work, struct ieee80211_local,
1385 dynamic_ps_disable_work);
1387 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1388 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1389 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1392 ieee80211_wake_queues_by_reason(&local->hw,
1393 IEEE80211_MAX_QUEUE_MAP,
1394 IEEE80211_QUEUE_STOP_REASON_PS);
1397 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1399 struct ieee80211_local *local =
1400 container_of(work, struct ieee80211_local,
1401 dynamic_ps_enable_work);
1402 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1403 struct ieee80211_if_managed *ifmgd;
1404 unsigned long flags;
1407 /* can only happen when PS was just disabled anyway */
1411 ifmgd = &sdata->u.mgd;
1413 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1416 if (local->hw.conf.dynamic_ps_timeout > 0) {
1417 /* don't enter PS if TX frames are pending */
1418 if (drv_tx_frames_pending(local)) {
1419 mod_timer(&local->dynamic_ps_timer, jiffies +
1421 local->hw.conf.dynamic_ps_timeout));
1426 * transmission can be stopped by others which leads to
1427 * dynamic_ps_timer expiry. Postpone the ps timer if it
1428 * is not the actual idle state.
1430 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1431 for (q = 0; q < local->hw.queues; q++) {
1432 if (local->queue_stop_reasons[q]) {
1433 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1435 mod_timer(&local->dynamic_ps_timer, jiffies +
1437 local->hw.conf.dynamic_ps_timeout));
1441 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1444 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1445 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1446 netif_tx_stop_all_queues(sdata->dev);
1448 if (drv_tx_frames_pending(local))
1449 mod_timer(&local->dynamic_ps_timer, jiffies +
1451 local->hw.conf.dynamic_ps_timeout));
1453 ieee80211_send_nullfunc(local, sdata, 1);
1454 /* Flush to get the tx status of nullfunc frame */
1455 ieee80211_flush_queues(local, sdata);
1459 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1460 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1461 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1462 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1463 local->hw.conf.flags |= IEEE80211_CONF_PS;
1464 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1467 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1468 netif_tx_wake_all_queues(sdata->dev);
1471 void ieee80211_dynamic_ps_timer(unsigned long data)
1473 struct ieee80211_local *local = (void *) data;
1475 if (local->quiescing || local->suspended)
1478 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1481 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1483 struct delayed_work *delayed_work =
1484 container_of(work, struct delayed_work, work);
1485 struct ieee80211_sub_if_data *sdata =
1486 container_of(delayed_work, struct ieee80211_sub_if_data,
1487 dfs_cac_timer_work);
1489 ieee80211_vif_release_channel(sdata);
1491 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1495 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1496 struct ieee80211_sub_if_data *sdata,
1497 const u8 *wmm_param, size_t wmm_param_len)
1499 struct ieee80211_tx_queue_params params;
1500 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1504 u8 uapsd_queues = 0;
1506 if (!local->ops->conf_tx)
1509 if (local->hw.queues < IEEE80211_NUM_ACS)
1515 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1518 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1519 uapsd_queues = ifmgd->uapsd_queues;
1521 count = wmm_param[6] & 0x0f;
1522 if (count == ifmgd->wmm_last_param_set)
1524 ifmgd->wmm_last_param_set = count;
1526 pos = wmm_param + 8;
1527 left = wmm_param_len - 8;
1529 memset(¶ms, 0, sizeof(params));
1532 for (; left >= 4; left -= 4, pos += 4) {
1533 int aci = (pos[0] >> 5) & 0x03;
1534 int acm = (pos[0] >> 4) & 0x01;
1542 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1543 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1549 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1550 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1556 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1557 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1564 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1565 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1570 params.aifs = pos[0] & 0x0f;
1571 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1572 params.cw_min = ecw2cw(pos[1] & 0x0f);
1573 params.txop = get_unaligned_le16(pos + 2);
1574 params.uapsd = uapsd;
1577 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1579 params.aifs, params.cw_min, params.cw_max,
1580 params.txop, params.uapsd);
1581 sdata->tx_conf[queue] = params;
1582 if (drv_conf_tx(local, sdata, queue, ¶ms))
1584 "failed to set TX queue parameters for queue %d\n",
1588 /* enable WMM or activate new settings */
1589 sdata->vif.bss_conf.qos = true;
1593 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1595 lockdep_assert_held(&sdata->local->mtx);
1597 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1598 IEEE80211_STA_BEACON_POLL);
1599 ieee80211_run_deferred_scan(sdata->local);
1602 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1604 mutex_lock(&sdata->local->mtx);
1605 __ieee80211_stop_poll(sdata);
1606 mutex_unlock(&sdata->local->mtx);
1609 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1610 u16 capab, bool erp_valid, u8 erp)
1612 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1614 bool use_protection;
1615 bool use_short_preamble;
1616 bool use_short_slot;
1619 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1620 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1622 use_protection = false;
1623 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1626 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1627 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1628 use_short_slot = true;
1630 if (use_protection != bss_conf->use_cts_prot) {
1631 bss_conf->use_cts_prot = use_protection;
1632 changed |= BSS_CHANGED_ERP_CTS_PROT;
1635 if (use_short_preamble != bss_conf->use_short_preamble) {
1636 bss_conf->use_short_preamble = use_short_preamble;
1637 changed |= BSS_CHANGED_ERP_PREAMBLE;
1640 if (use_short_slot != bss_conf->use_short_slot) {
1641 bss_conf->use_short_slot = use_short_slot;
1642 changed |= BSS_CHANGED_ERP_SLOT;
1648 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1649 struct cfg80211_bss *cbss,
1650 u32 bss_info_changed)
1652 struct ieee80211_bss *bss = (void *)cbss->priv;
1653 struct ieee80211_local *local = sdata->local;
1654 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1656 bss_info_changed |= BSS_CHANGED_ASSOC;
1657 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1658 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1660 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1661 beacon_loss_count * bss_conf->beacon_int));
1663 sdata->u.mgd.associated = cbss;
1664 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1666 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1668 if (sdata->vif.p2p) {
1669 const struct cfg80211_bss_ies *ies;
1672 ies = rcu_dereference(cbss->ies);
1676 ret = cfg80211_get_p2p_attr(
1677 ies->data, ies->len,
1678 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1679 (u8 *) &bss_conf->p2p_noa_attr,
1680 sizeof(bss_conf->p2p_noa_attr));
1682 sdata->u.mgd.p2p_noa_index =
1683 bss_conf->p2p_noa_attr.index;
1684 bss_info_changed |= BSS_CHANGED_P2P_PS;
1690 /* just to be sure */
1691 ieee80211_stop_poll(sdata);
1693 ieee80211_led_assoc(local, 1);
1695 if (sdata->u.mgd.assoc_data->have_beacon) {
1697 * If the AP is buggy we may get here with no DTIM period
1698 * known, so assume it's 1 which is the only safe assumption
1699 * in that case, although if the TIM IE is broken powersave
1700 * probably just won't work at all.
1702 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1703 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
1705 bss_conf->dtim_period = 0;
1708 bss_conf->assoc = 1;
1710 /* Tell the driver to monitor connection quality (if supported) */
1711 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1712 bss_conf->cqm_rssi_thold)
1713 bss_info_changed |= BSS_CHANGED_CQM;
1715 /* Enable ARP filtering */
1716 if (bss_conf->arp_addr_cnt)
1717 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1719 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1721 mutex_lock(&local->iflist_mtx);
1722 ieee80211_recalc_ps(local, -1);
1723 mutex_unlock(&local->iflist_mtx);
1725 ieee80211_recalc_smps(sdata);
1726 ieee80211_recalc_ps_vif(sdata);
1728 netif_tx_start_all_queues(sdata->dev);
1729 netif_carrier_on(sdata->dev);
1732 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1733 u16 stype, u16 reason, bool tx,
1736 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1737 struct ieee80211_local *local = sdata->local;
1740 ASSERT_MGD_MTX(ifmgd);
1742 if (WARN_ON_ONCE(tx && !frame_buf))
1745 if (WARN_ON(!ifmgd->associated))
1748 ieee80211_stop_poll(sdata);
1750 ifmgd->associated = NULL;
1753 * we need to commit the associated = NULL change because the
1754 * scan code uses that to determine whether this iface should
1755 * go to/wake up from powersave or not -- and could otherwise
1756 * wake the queues erroneously.
1761 * Thus, we can only afterwards stop the queues -- to account
1762 * for the case where another CPU is finishing a scan at this
1763 * time -- we don't want the scan code to enable queues.
1766 netif_tx_stop_all_queues(sdata->dev);
1767 netif_carrier_off(sdata->dev);
1770 * if we want to get out of ps before disassoc (why?) we have
1771 * to do it before sending disassoc, as otherwise the null-packet
1774 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1775 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1776 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1778 local->ps_sdata = NULL;
1780 /* disable per-vif ps */
1781 ieee80211_recalc_ps_vif(sdata);
1783 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1785 ieee80211_flush_queues(local, sdata);
1787 /* deauthenticate/disassociate now */
1788 if (tx || frame_buf)
1789 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1790 reason, tx, frame_buf);
1792 /* flush out frame */
1794 ieee80211_flush_queues(local, sdata);
1796 /* clear bssid only after building the needed mgmt frames */
1797 memset(ifmgd->bssid, 0, ETH_ALEN);
1799 /* remove AP and TDLS peers */
1800 sta_info_flush_defer(sdata);
1802 /* finally reset all BSS / config parameters */
1803 changed |= ieee80211_reset_erp_info(sdata);
1805 ieee80211_led_assoc(local, 0);
1806 changed |= BSS_CHANGED_ASSOC;
1807 sdata->vif.bss_conf.assoc = false;
1809 ifmgd->p2p_noa_index = -1;
1810 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1811 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1813 /* on the next assoc, re-program HT/VHT parameters */
1814 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1815 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1816 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1817 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1819 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1821 del_timer_sync(&local->dynamic_ps_timer);
1822 cancel_work_sync(&local->dynamic_ps_enable_work);
1824 /* Disable ARP filtering */
1825 if (sdata->vif.bss_conf.arp_addr_cnt)
1826 changed |= BSS_CHANGED_ARP_FILTER;
1828 sdata->vif.bss_conf.qos = false;
1829 changed |= BSS_CHANGED_QOS;
1831 /* The BSSID (not really interesting) and HT changed */
1832 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1833 ieee80211_bss_info_change_notify(sdata, changed);
1835 /* disassociated - set to defaults now */
1836 ieee80211_set_wmm_default(sdata, false);
1838 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1839 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1840 del_timer_sync(&sdata->u.mgd.timer);
1841 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1843 sdata->vif.bss_conf.dtim_period = 0;
1846 ieee80211_vif_release_channel(sdata);
1849 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1850 struct ieee80211_hdr *hdr)
1853 * We can postpone the mgd.timer whenever receiving unicast frames
1854 * from AP because we know that the connection is working both ways
1855 * at that time. But multicast frames (and hence also beacons) must
1856 * be ignored here, because we need to trigger the timer during
1857 * data idle periods for sending the periodic probe request to the
1858 * AP we're connected to.
1860 if (is_multicast_ether_addr(hdr->addr1))
1863 ieee80211_sta_reset_conn_monitor(sdata);
1866 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1868 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1869 struct ieee80211_local *local = sdata->local;
1871 mutex_lock(&local->mtx);
1872 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1873 IEEE80211_STA_CONNECTION_POLL))) {
1874 mutex_unlock(&local->mtx);
1878 __ieee80211_stop_poll(sdata);
1880 mutex_lock(&local->iflist_mtx);
1881 ieee80211_recalc_ps(local, -1);
1882 mutex_unlock(&local->iflist_mtx);
1884 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1888 * We've received a probe response, but are not sure whether
1889 * we have or will be receiving any beacons or data, so let's
1890 * schedule the timers again, just in case.
1892 ieee80211_sta_reset_beacon_monitor(sdata);
1894 mod_timer(&ifmgd->conn_mon_timer,
1895 round_jiffies_up(jiffies +
1896 IEEE80211_CONNECTION_IDLE_TIME));
1898 mutex_unlock(&local->mtx);
1901 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1902 struct ieee80211_hdr *hdr, bool ack)
1904 if (!ieee80211_is_data(hdr->frame_control))
1907 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1908 sdata->u.mgd.probe_send_count > 0) {
1910 ieee80211_sta_reset_conn_monitor(sdata);
1912 sdata->u.mgd.nullfunc_failed = true;
1913 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1918 ieee80211_sta_reset_conn_monitor(sdata);
1921 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1923 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1925 u8 *dst = ifmgd->associated->bssid;
1926 u8 unicast_limit = max(1, max_probe_tries - 3);
1929 * Try sending broadcast probe requests for the last three
1930 * probe requests after the first ones failed since some
1931 * buggy APs only support broadcast probe requests.
1933 if (ifmgd->probe_send_count >= unicast_limit)
1937 * When the hardware reports an accurate Tx ACK status, it's
1938 * better to send a nullfunc frame instead of a probe request,
1939 * as it will kick us off the AP quickly if we aren't associated
1940 * anymore. The timeout will be reset if the frame is ACKed by
1943 ifmgd->probe_send_count++;
1945 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1946 ifmgd->nullfunc_failed = false;
1947 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1952 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1953 if (WARN_ON_ONCE(ssid == NULL))
1958 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1959 0, (u32) -1, true, 0,
1960 ifmgd->associated->channel, false);
1964 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1965 run_again(ifmgd, ifmgd->probe_timeout);
1966 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1967 ieee80211_flush_queues(sdata->local, sdata);
1970 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1973 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1974 bool already = false;
1976 if (!ieee80211_sdata_running(sdata))
1979 mutex_lock(&ifmgd->mtx);
1981 if (!ifmgd->associated)
1984 mutex_lock(&sdata->local->mtx);
1986 if (sdata->local->tmp_channel || sdata->local->scanning) {
1987 mutex_unlock(&sdata->local->mtx);
1992 mlme_dbg_ratelimited(sdata,
1993 "detected beacon loss from AP (missed %d beacons) - probing\n",
1996 ieee80211_cqm_rssi_notify(&sdata->vif,
1997 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2002 * The driver/our work has already reported this event or the
2003 * connection monitoring has kicked in and we have already sent
2004 * a probe request. Or maybe the AP died and the driver keeps
2005 * reporting until we disassociate...
2007 * In either case we have to ignore the current call to this
2008 * function (except for setting the correct probe reason bit)
2009 * because otherwise we would reset the timer every time and
2010 * never check whether we received a probe response!
2012 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2013 IEEE80211_STA_CONNECTION_POLL))
2017 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2019 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2021 mutex_unlock(&sdata->local->mtx);
2026 mutex_lock(&sdata->local->iflist_mtx);
2027 ieee80211_recalc_ps(sdata->local, -1);
2028 mutex_unlock(&sdata->local->iflist_mtx);
2030 ifmgd->probe_send_count = 0;
2031 ieee80211_mgd_probe_ap_send(sdata);
2033 mutex_unlock(&ifmgd->mtx);
2036 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2037 struct ieee80211_vif *vif)
2039 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2041 struct cfg80211_bss *cbss;
2042 struct sk_buff *skb;
2046 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2049 ASSERT_MGD_MTX(ifmgd);
2051 if (ifmgd->associated)
2052 cbss = ifmgd->associated;
2053 else if (ifmgd->auth_data)
2054 cbss = ifmgd->auth_data->bss;
2055 else if (ifmgd->assoc_data)
2056 cbss = ifmgd->assoc_data->bss;
2061 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2062 if (WARN_ON_ONCE(ssid == NULL))
2067 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2068 (u32) -1, cbss->channel,
2075 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2077 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2080 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2082 mutex_lock(&ifmgd->mtx);
2083 if (!ifmgd->associated) {
2084 mutex_unlock(&ifmgd->mtx);
2088 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2089 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2091 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2092 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2093 IEEE80211_MAX_QUEUE_MAP,
2094 IEEE80211_QUEUE_STOP_REASON_CSA);
2095 mutex_unlock(&ifmgd->mtx);
2098 * must be outside lock due to cfg80211,
2099 * but that's not a problem.
2101 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
2104 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2106 struct ieee80211_sub_if_data *sdata =
2107 container_of(work, struct ieee80211_sub_if_data,
2108 u.mgd.beacon_connection_loss_work);
2109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2110 struct sta_info *sta;
2112 if (ifmgd->associated) {
2114 sta = sta_info_get(sdata, ifmgd->bssid);
2116 sta->beacon_loss_count++;
2120 if (ifmgd->connection_loss) {
2121 sdata_info(sdata, "Connection to AP %pM lost\n",
2123 __ieee80211_disconnect(sdata);
2125 ieee80211_mgd_probe_ap(sdata, true);
2129 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2131 struct ieee80211_sub_if_data *sdata =
2132 container_of(work, struct ieee80211_sub_if_data,
2133 u.mgd.csa_connection_drop_work);
2135 __ieee80211_disconnect(sdata);
2138 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2140 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2141 struct ieee80211_hw *hw = &sdata->local->hw;
2143 trace_api_beacon_loss(sdata);
2145 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
2146 sdata->u.mgd.connection_loss = false;
2147 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2149 EXPORT_SYMBOL(ieee80211_beacon_loss);
2151 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2153 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2154 struct ieee80211_hw *hw = &sdata->local->hw;
2156 trace_api_connection_loss(sdata);
2158 sdata->u.mgd.connection_loss = true;
2159 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2161 EXPORT_SYMBOL(ieee80211_connection_loss);
2164 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2167 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2169 lockdep_assert_held(&sdata->u.mgd.mtx);
2172 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2174 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2175 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2176 sdata->u.mgd.flags = 0;
2177 ieee80211_vif_release_channel(sdata);
2180 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2182 sdata->u.mgd.auth_data = NULL;
2185 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2186 struct ieee80211_mgmt *mgmt, size_t len)
2188 struct ieee80211_local *local = sdata->local;
2189 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2191 struct ieee802_11_elems elems;
2194 pos = mgmt->u.auth.variable;
2195 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2196 if (!elems.challenge)
2198 auth_data->expected_transaction = 4;
2199 drv_mgd_prepare_tx(sdata->local, sdata);
2200 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2201 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2202 IEEE80211_TX_INTFL_MLME_CONN_TX;
2203 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2204 elems.challenge - 2, elems.challenge_len + 2,
2205 auth_data->bss->bssid, auth_data->bss->bssid,
2206 auth_data->key, auth_data->key_len,
2207 auth_data->key_idx, tx_flags);
2210 static enum rx_mgmt_action __must_check
2211 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2212 struct ieee80211_mgmt *mgmt, size_t len)
2214 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2216 u16 auth_alg, auth_transaction, status_code;
2217 struct sta_info *sta;
2219 lockdep_assert_held(&ifmgd->mtx);
2222 return RX_MGMT_NONE;
2224 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2225 return RX_MGMT_NONE;
2227 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2229 if (!ether_addr_equal(bssid, mgmt->bssid))
2230 return RX_MGMT_NONE;
2232 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2233 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2234 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2236 if (auth_alg != ifmgd->auth_data->algorithm ||
2237 auth_transaction != ifmgd->auth_data->expected_transaction) {
2238 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2239 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2241 ifmgd->auth_data->expected_transaction);
2242 return RX_MGMT_NONE;
2245 if (status_code != WLAN_STATUS_SUCCESS) {
2246 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2247 mgmt->sa, status_code);
2248 ieee80211_destroy_auth_data(sdata, false);
2249 return RX_MGMT_CFG80211_RX_AUTH;
2252 switch (ifmgd->auth_data->algorithm) {
2253 case WLAN_AUTH_OPEN:
2254 case WLAN_AUTH_LEAP:
2258 case WLAN_AUTH_SHARED_KEY:
2259 if (ifmgd->auth_data->expected_transaction != 4) {
2260 ieee80211_auth_challenge(sdata, mgmt, len);
2261 /* need another frame */
2262 return RX_MGMT_NONE;
2266 WARN_ONCE(1, "invalid auth alg %d",
2267 ifmgd->auth_data->algorithm);
2268 return RX_MGMT_NONE;
2271 sdata_info(sdata, "authenticated\n");
2272 ifmgd->auth_data->done = true;
2273 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2274 ifmgd->auth_data->timeout_started = true;
2275 run_again(ifmgd, ifmgd->auth_data->timeout);
2277 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2278 ifmgd->auth_data->expected_transaction != 2) {
2280 * Report auth frame to user space for processing since another
2281 * round of Authentication frames is still needed.
2283 return RX_MGMT_CFG80211_RX_AUTH;
2286 /* move station state to auth */
2287 mutex_lock(&sdata->local->sta_mtx);
2288 sta = sta_info_get(sdata, bssid);
2290 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2293 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2294 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2297 mutex_unlock(&sdata->local->sta_mtx);
2299 return RX_MGMT_CFG80211_RX_AUTH;
2301 mutex_unlock(&sdata->local->sta_mtx);
2302 /* ignore frame -- wait for timeout */
2303 return RX_MGMT_NONE;
2307 static enum rx_mgmt_action __must_check
2308 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2309 struct ieee80211_mgmt *mgmt, size_t len)
2311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2312 const u8 *bssid = NULL;
2315 lockdep_assert_held(&ifmgd->mtx);
2318 return RX_MGMT_NONE;
2320 if (!ifmgd->associated ||
2321 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2322 return RX_MGMT_NONE;
2324 bssid = ifmgd->associated->bssid;
2326 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2328 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2329 bssid, reason_code);
2331 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2333 return RX_MGMT_CFG80211_DEAUTH;
2337 static enum rx_mgmt_action __must_check
2338 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2339 struct ieee80211_mgmt *mgmt, size_t len)
2341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2344 lockdep_assert_held(&ifmgd->mtx);
2347 return RX_MGMT_NONE;
2349 if (!ifmgd->associated ||
2350 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2351 return RX_MGMT_NONE;
2353 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2355 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2356 mgmt->sa, reason_code);
2358 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2360 return RX_MGMT_CFG80211_DISASSOC;
2363 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2364 u8 *supp_rates, unsigned int supp_rates_len,
2365 u32 *rates, u32 *basic_rates,
2366 bool *have_higher_than_11mbit,
2367 int *min_rate, int *min_rate_index)
2371 for (i = 0; i < supp_rates_len; i++) {
2372 int rate = (supp_rates[i] & 0x7f) * 5;
2373 bool is_basic = !!(supp_rates[i] & 0x80);
2376 *have_higher_than_11mbit = true;
2379 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2380 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2382 * Note: Even through the membership selector and the basic
2383 * rate flag share the same bit, they are not exactly
2386 if (!!(supp_rates[i] & 0x80) &&
2387 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2390 for (j = 0; j < sband->n_bitrates; j++) {
2391 if (sband->bitrates[j].bitrate == rate) {
2394 *basic_rates |= BIT(j);
2395 if (rate < *min_rate) {
2397 *min_rate_index = j;
2405 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2408 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2410 lockdep_assert_held(&sdata->u.mgd.mtx);
2413 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2415 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2416 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2417 sdata->u.mgd.flags = 0;
2418 ieee80211_vif_release_channel(sdata);
2422 sdata->u.mgd.assoc_data = NULL;
2425 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2426 struct cfg80211_bss *cbss,
2427 struct ieee80211_mgmt *mgmt, size_t len)
2429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2430 struct ieee80211_local *local = sdata->local;
2431 struct ieee80211_supported_band *sband;
2432 struct sta_info *sta;
2434 u16 capab_info, aid;
2435 struct ieee802_11_elems elems;
2436 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2440 /* AssocResp and ReassocResp have identical structure */
2442 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2443 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2445 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2446 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2448 aid &= ~(BIT(15) | BIT(14));
2450 ifmgd->broken_ap = false;
2452 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2453 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2456 ifmgd->broken_ap = true;
2459 pos = mgmt->u.assoc_resp.variable;
2460 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2462 if (!elems.supp_rates) {
2463 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2470 * We previously checked these in the beacon/probe response, so
2471 * they should be present here. This is just a safety net.
2473 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2474 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2476 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2480 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2481 (!elems.vht_cap_elem || !elems.vht_operation)) {
2483 "VHT AP is missing VHT capability/operation in AssocResp\n");
2487 mutex_lock(&sdata->local->sta_mtx);
2489 * station info was already allocated and inserted before
2490 * the association and should be available to us
2492 sta = sta_info_get(sdata, cbss->bssid);
2493 if (WARN_ON(!sta)) {
2494 mutex_unlock(&sdata->local->sta_mtx);
2498 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2500 /* Set up internal HT/VHT capabilities */
2501 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2502 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2503 elems.ht_cap_elem, sta);
2505 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2506 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2507 elems.vht_cap_elem, sta);
2510 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2511 * in their association response, so ignore that data for our own
2512 * configuration. If it changed since the last beacon, we'll get the
2513 * next beacon and update then.
2517 * If an operating mode notification IE is present, override the
2518 * NSS calculation (that would be done in rate_control_rate_init())
2519 * and use the # of streams from that element.
2521 if (elems.opmode_notif &&
2522 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2525 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2526 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2528 sta->sta.rx_nss = nss;
2531 rate_control_rate_init(sta);
2533 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2534 set_sta_flag(sta, WLAN_STA_MFP);
2536 if (elems.wmm_param)
2537 set_sta_flag(sta, WLAN_STA_WME);
2539 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2540 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2541 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2544 "failed to move station %pM to desired state\n",
2546 WARN_ON(__sta_info_destroy(sta));
2547 mutex_unlock(&sdata->local->sta_mtx);
2551 mutex_unlock(&sdata->local->sta_mtx);
2554 * Always handle WMM once after association regardless
2555 * of the first value the AP uses. Setting -1 here has
2556 * that effect because the AP values is an unsigned
2559 ifmgd->wmm_last_param_set = -1;
2561 if (elems.wmm_param)
2562 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2563 elems.wmm_param_len);
2565 ieee80211_set_wmm_default(sdata, false);
2566 changed |= BSS_CHANGED_QOS;
2568 /* set AID and assoc capability,
2569 * ieee80211_set_associated() will tell the driver */
2570 bss_conf->aid = aid;
2571 bss_conf->assoc_capability = capab_info;
2572 ieee80211_set_associated(sdata, cbss, changed);
2575 * If we're using 4-addr mode, let the AP know that we're
2576 * doing so, so that it can create the STA VLAN on its side
2578 if (ifmgd->use_4addr)
2579 ieee80211_send_4addr_nullfunc(local, sdata);
2582 * Start timer to probe the connection to the AP now.
2583 * Also start the timer that will detect beacon loss.
2585 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2586 ieee80211_sta_reset_beacon_monitor(sdata);
2591 static enum rx_mgmt_action __must_check
2592 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2593 struct ieee80211_mgmt *mgmt, size_t len,
2594 struct cfg80211_bss **bss)
2596 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2597 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2598 u16 capab_info, status_code, aid;
2599 struct ieee802_11_elems elems;
2603 lockdep_assert_held(&ifmgd->mtx);
2606 return RX_MGMT_NONE;
2607 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2608 return RX_MGMT_NONE;
2611 * AssocResp and ReassocResp have identical structure, so process both
2612 * of them in this function.
2616 return RX_MGMT_NONE;
2618 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2619 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2620 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2621 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2624 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2625 reassoc ? "Rea" : "A", mgmt->sa,
2626 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2628 pos = mgmt->u.assoc_resp.variable;
2629 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2631 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2632 elems.timeout_int && elems.timeout_int_len == 5 &&
2633 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2635 tu = get_unaligned_le32(elems.timeout_int + 1);
2636 ms = tu * 1024 / 1000;
2638 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2640 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2641 assoc_data->timeout_started = true;
2642 if (ms > IEEE80211_ASSOC_TIMEOUT)
2643 run_again(ifmgd, assoc_data->timeout);
2644 return RX_MGMT_NONE;
2647 *bss = assoc_data->bss;
2649 if (status_code != WLAN_STATUS_SUCCESS) {
2650 sdata_info(sdata, "%pM denied association (code=%d)\n",
2651 mgmt->sa, status_code);
2652 ieee80211_destroy_assoc_data(sdata, false);
2654 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2655 /* oops -- internal error -- send timeout for now */
2656 ieee80211_destroy_assoc_data(sdata, false);
2657 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
2658 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2660 sdata_info(sdata, "associated\n");
2663 * destroy assoc_data afterwards, as otherwise an idle
2664 * recalc after assoc_data is NULL but before associated
2665 * is set can cause the interface to go idle
2667 ieee80211_destroy_assoc_data(sdata, true);
2670 return RX_MGMT_CFG80211_RX_ASSOC;
2673 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2674 struct ieee80211_mgmt *mgmt, size_t len,
2675 struct ieee80211_rx_status *rx_status,
2676 struct ieee802_11_elems *elems)
2678 struct ieee80211_local *local = sdata->local;
2680 struct ieee80211_bss *bss;
2681 struct ieee80211_channel *channel;
2682 bool need_ps = false;
2684 if ((sdata->u.mgd.associated &&
2685 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2686 (sdata->u.mgd.assoc_data &&
2687 ether_addr_equal(mgmt->bssid,
2688 sdata->u.mgd.assoc_data->bss->bssid))) {
2689 /* not previously set so we may need to recalc */
2690 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2692 if (elems->tim && !elems->parse_error) {
2693 const struct ieee80211_tim_ie *tim_ie = elems->tim;
2694 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2698 if (elems->ds_params && elems->ds_params_len == 1)
2699 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2702 freq = rx_status->freq;
2704 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2706 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2709 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2712 ieee80211_rx_bss_put(local, bss);
2714 if (!sdata->u.mgd.associated)
2718 mutex_lock(&local->iflist_mtx);
2719 ieee80211_recalc_ps(local, -1);
2720 mutex_unlock(&local->iflist_mtx);
2723 if (elems->ch_switch_ie &&
2724 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2725 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
2726 bss, rx_status->mactime);
2730 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2731 struct sk_buff *skb)
2733 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2734 struct ieee80211_if_managed *ifmgd;
2735 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2736 size_t baselen, len = skb->len;
2737 struct ieee802_11_elems elems;
2739 ifmgd = &sdata->u.mgd;
2741 ASSERT_MGD_MTX(ifmgd);
2743 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2744 return; /* ignore ProbeResp to foreign address */
2746 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2750 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2753 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2755 if (ifmgd->associated &&
2756 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2757 ieee80211_reset_ap_probe(sdata);
2759 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2760 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2761 /* got probe response, continue with auth */
2762 sdata_info(sdata, "direct probe responded\n");
2763 ifmgd->auth_data->tries = 0;
2764 ifmgd->auth_data->timeout = jiffies;
2765 ifmgd->auth_data->timeout_started = true;
2766 run_again(ifmgd, ifmgd->auth_data->timeout);
2771 * This is the canonical list of information elements we care about,
2772 * the filter code also gives us all changes to the Microsoft OUI
2773 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2775 * We implement beacon filtering in software since that means we can
2776 * avoid processing the frame here and in cfg80211, and userspace
2777 * will not be able to tell whether the hardware supports it or not.
2779 * XXX: This list needs to be dynamic -- userspace needs to be able to
2780 * add items it requires. It also needs to be able to tell us to
2781 * look out for other vendor IEs.
2783 static const u64 care_about_ies =
2784 (1ULL << WLAN_EID_COUNTRY) |
2785 (1ULL << WLAN_EID_ERP_INFO) |
2786 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2787 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2788 (1ULL << WLAN_EID_HT_CAPABILITY) |
2789 (1ULL << WLAN_EID_HT_OPERATION);
2791 static enum rx_mgmt_action
2792 ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2793 struct ieee80211_mgmt *mgmt, size_t len,
2794 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
2796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2797 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2799 struct ieee802_11_elems elems;
2800 struct ieee80211_local *local = sdata->local;
2801 struct ieee80211_chanctx_conf *chanctx_conf;
2802 struct ieee80211_channel *chan;
2803 struct sta_info *sta;
2810 lockdep_assert_held(&ifmgd->mtx);
2812 /* Process beacon from the current BSS */
2813 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2815 return RX_MGMT_NONE;
2818 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2819 if (!chanctx_conf) {
2821 return RX_MGMT_NONE;
2824 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2826 return RX_MGMT_NONE;
2828 chan = chanctx_conf->def.chan;
2831 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2832 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2833 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2834 len - baselen, &elems);
2836 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2837 ifmgd->assoc_data->have_beacon = true;
2838 ifmgd->assoc_data->need_beacon = false;
2839 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2840 sdata->vif.bss_conf.sync_tsf =
2841 le64_to_cpu(mgmt->u.beacon.timestamp);
2842 sdata->vif.bss_conf.sync_device_ts =
2843 rx_status->device_timestamp;
2845 sdata->vif.bss_conf.sync_dtim_count =
2846 elems.tim->dtim_count;
2848 sdata->vif.bss_conf.sync_dtim_count = 0;
2850 /* continue assoc process */
2851 ifmgd->assoc_data->timeout = jiffies;
2852 ifmgd->assoc_data->timeout_started = true;
2853 run_again(ifmgd, ifmgd->assoc_data->timeout);
2854 return RX_MGMT_NONE;
2857 if (!ifmgd->associated ||
2858 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2859 return RX_MGMT_NONE;
2860 bssid = ifmgd->associated->bssid;
2862 /* Track average RSSI from the Beacon frames of the current AP */
2863 ifmgd->last_beacon_signal = rx_status->signal;
2864 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2865 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2866 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2867 ifmgd->last_cqm_event_signal = 0;
2868 ifmgd->count_beacon_signal = 1;
2869 ifmgd->last_ave_beacon_signal = 0;
2871 ifmgd->ave_beacon_signal =
2872 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2873 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2874 ifmgd->ave_beacon_signal) / 16;
2875 ifmgd->count_beacon_signal++;
2878 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2879 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2880 int sig = ifmgd->ave_beacon_signal;
2881 int last_sig = ifmgd->last_ave_beacon_signal;
2884 * if signal crosses either of the boundaries, invoke callback
2885 * with appropriate parameters
2887 if (sig > ifmgd->rssi_max_thold &&
2888 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2889 ifmgd->last_ave_beacon_signal = sig;
2890 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
2891 } else if (sig < ifmgd->rssi_min_thold &&
2892 (last_sig >= ifmgd->rssi_max_thold ||
2894 ifmgd->last_ave_beacon_signal = sig;
2895 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
2899 if (bss_conf->cqm_rssi_thold &&
2900 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2901 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2902 int sig = ifmgd->ave_beacon_signal / 16;
2903 int last_event = ifmgd->last_cqm_event_signal;
2904 int thold = bss_conf->cqm_rssi_thold;
2905 int hyst = bss_conf->cqm_rssi_hyst;
2907 (last_event == 0 || sig < last_event - hyst)) {
2908 ifmgd->last_cqm_event_signal = sig;
2909 ieee80211_cqm_rssi_notify(
2911 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2913 } else if (sig > thold &&
2914 (last_event == 0 || sig > last_event + hyst)) {
2915 ifmgd->last_cqm_event_signal = sig;
2916 ieee80211_cqm_rssi_notify(
2918 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2923 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2924 mlme_dbg_ratelimited(sdata,
2925 "cancelling AP probe due to a received beacon\n");
2926 mutex_lock(&local->mtx);
2927 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2928 ieee80211_run_deferred_scan(local);
2929 mutex_unlock(&local->mtx);
2931 mutex_lock(&local->iflist_mtx);
2932 ieee80211_recalc_ps(local, -1);
2933 mutex_unlock(&local->iflist_mtx);
2937 * Push the beacon loss detection into the future since
2938 * we are processing a beacon from the AP just now.
2940 ieee80211_sta_reset_beacon_monitor(sdata);
2942 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2943 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2944 len - baselen, &elems,
2945 care_about_ies, ncrc);
2947 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2948 bool directed_tim = ieee80211_check_tim(elems.tim,
2952 if (local->hw.conf.dynamic_ps_timeout > 0) {
2953 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2954 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2955 ieee80211_hw_config(local,
2956 IEEE80211_CONF_CHANGE_PS);
2958 ieee80211_send_nullfunc(local, sdata, 0);
2959 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2960 local->pspolling = true;
2963 * Here is assumed that the driver will be
2964 * able to send ps-poll frame and receive a
2965 * response even though power save mode is
2966 * enabled, but some drivers might require
2967 * to disable power save here. This needs
2968 * to be investigated.
2970 ieee80211_send_pspoll(local, sdata);
2975 if (sdata->vif.p2p) {
2976 struct ieee80211_p2p_noa_attr noa = {};
2979 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2981 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2982 (u8 *) &noa, sizeof(noa));
2984 if (sdata->u.mgd.p2p_noa_index != noa.index) {
2985 /* valid noa_attr and index changed */
2986 sdata->u.mgd.p2p_noa_index = noa.index;
2987 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
2988 changed |= BSS_CHANGED_P2P_PS;
2990 * make sure we update all information, the CRC
2991 * mechanism doesn't look at P2P attributes.
2993 ifmgd->beacon_crc_valid = false;
2995 } else if (sdata->u.mgd.p2p_noa_index != -1) {
2996 /* noa_attr not found and we had valid noa_attr before */
2997 sdata->u.mgd.p2p_noa_index = -1;
2998 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
2999 changed |= BSS_CHANGED_P2P_PS;
3000 ifmgd->beacon_crc_valid = false;
3004 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3005 return RX_MGMT_NONE;
3006 ifmgd->beacon_crc = ncrc;
3007 ifmgd->beacon_crc_valid = true;
3009 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3011 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3012 elems.wmm_param_len))
3013 changed |= BSS_CHANGED_QOS;
3016 * If we haven't had a beacon before, tell the driver about the
3017 * DTIM period (and beacon timing if desired) now.
3019 if (!bss_conf->dtim_period) {
3020 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3022 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3024 bss_conf->dtim_period = 1;
3026 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3027 sdata->vif.bss_conf.sync_tsf =
3028 le64_to_cpu(mgmt->u.beacon.timestamp);
3029 sdata->vif.bss_conf.sync_device_ts =
3030 rx_status->device_timestamp;
3032 sdata->vif.bss_conf.sync_dtim_count =
3033 elems.tim->dtim_count;
3035 sdata->vif.bss_conf.sync_dtim_count = 0;
3038 changed |= BSS_CHANGED_DTIM_PERIOD;
3041 if (elems.erp_info && elems.erp_info_len >= 1) {
3043 erp_value = elems.erp_info[0];
3047 changed |= ieee80211_handle_bss_capability(sdata,
3048 le16_to_cpu(mgmt->u.beacon.capab_info),
3049 erp_valid, erp_value);
3051 mutex_lock(&local->sta_mtx);
3052 sta = sta_info_get(sdata, bssid);
3054 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3055 elems.vht_operation, bssid, &changed)) {
3056 mutex_unlock(&local->sta_mtx);
3057 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3058 WLAN_REASON_DEAUTH_LEAVING,
3060 return RX_MGMT_CFG80211_TX_DEAUTH;
3063 if (sta && elems.opmode_notif)
3064 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3065 rx_status->band, true);
3066 mutex_unlock(&local->sta_mtx);
3068 if (elems.country_elem && elems.pwr_constr_elem &&
3069 mgmt->u.probe_resp.capab_info &
3070 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3071 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3073 elems.country_elem_len,
3074 elems.pwr_constr_elem);
3076 ieee80211_bss_info_change_notify(sdata, changed);
3078 return RX_MGMT_NONE;
3081 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3082 struct sk_buff *skb)
3084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3085 struct ieee80211_rx_status *rx_status;
3086 struct ieee80211_mgmt *mgmt;
3087 struct cfg80211_bss *bss = NULL;
3088 enum rx_mgmt_action rma = RX_MGMT_NONE;
3089 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3092 rx_status = (struct ieee80211_rx_status *) skb->cb;
3093 mgmt = (struct ieee80211_mgmt *) skb->data;
3094 fc = le16_to_cpu(mgmt->frame_control);
3096 mutex_lock(&ifmgd->mtx);
3098 switch (fc & IEEE80211_FCTL_STYPE) {
3099 case IEEE80211_STYPE_BEACON:
3100 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3101 deauth_buf, rx_status);
3103 case IEEE80211_STYPE_PROBE_RESP:
3104 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3106 case IEEE80211_STYPE_AUTH:
3107 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3109 case IEEE80211_STYPE_DEAUTH:
3110 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3112 case IEEE80211_STYPE_DISASSOC:
3113 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3115 case IEEE80211_STYPE_ASSOC_RESP:
3116 case IEEE80211_STYPE_REASSOC_RESP:
3117 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3119 case IEEE80211_STYPE_ACTION:
3120 switch (mgmt->u.action.category) {
3121 case WLAN_CATEGORY_SPECTRUM_MGMT:
3122 ieee80211_sta_process_chanswitch(sdata,
3123 &mgmt->u.action.u.chan_switch.sw_elem,
3124 (void *)ifmgd->associated->priv,
3125 rx_status->mactime);
3129 mutex_unlock(&ifmgd->mtx);
3135 case RX_MGMT_CFG80211_DEAUTH:
3136 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
3138 case RX_MGMT_CFG80211_DISASSOC:
3139 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3141 case RX_MGMT_CFG80211_RX_AUTH:
3142 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3144 case RX_MGMT_CFG80211_RX_ASSOC:
3145 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3147 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3148 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3150 case RX_MGMT_CFG80211_TX_DEAUTH:
3151 cfg80211_send_deauth(sdata->dev, deauth_buf,
3152 sizeof(deauth_buf));
3155 WARN(1, "unexpected: %d", rma);
3159 static void ieee80211_sta_timer(unsigned long data)
3161 struct ieee80211_sub_if_data *sdata =
3162 (struct ieee80211_sub_if_data *) data;
3164 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3167 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3168 u8 *bssid, u8 reason, bool tx)
3170 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3171 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3173 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3175 mutex_unlock(&ifmgd->mtx);
3178 * must be outside lock due to cfg80211,
3179 * but that's not a problem.
3181 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
3183 mutex_lock(&ifmgd->mtx);
3186 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3188 struct ieee80211_local *local = sdata->local;
3189 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3190 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3193 lockdep_assert_held(&ifmgd->mtx);
3195 if (WARN_ON_ONCE(!auth_data))
3198 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3199 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3200 IEEE80211_TX_INTFL_MLME_CONN_TX;
3204 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3205 sdata_info(sdata, "authentication with %pM timed out\n",
3206 auth_data->bss->bssid);
3209 * Most likely AP is not in the range so remove the
3210 * bss struct for that AP.
3212 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3217 drv_mgd_prepare_tx(local, sdata);
3219 if (auth_data->bss->proberesp_ies) {
3223 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3224 auth_data->bss->bssid, auth_data->tries,
3225 IEEE80211_AUTH_MAX_TRIES);
3227 auth_data->expected_transaction = 2;
3229 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3230 trans = auth_data->sae_trans;
3231 status = auth_data->sae_status;
3232 auth_data->expected_transaction = trans;
3235 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3236 auth_data->data, auth_data->data_len,
3237 auth_data->bss->bssid,
3238 auth_data->bss->bssid, NULL, 0, 0,
3243 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3244 auth_data->bss->bssid, auth_data->tries,
3245 IEEE80211_AUTH_MAX_TRIES);
3248 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3254 * Direct probe is sent to broadcast address as some APs
3255 * will not answer to direct packet in unassociated state.
3257 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3258 NULL, 0, (u32) -1, true, tx_flags,
3259 auth_data->bss->channel, false);
3263 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3264 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3265 ifmgd->auth_data->timeout_started = true;
3266 run_again(ifmgd, auth_data->timeout);
3268 auth_data->timeout_started = false;
3274 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3276 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3277 struct ieee80211_local *local = sdata->local;
3279 lockdep_assert_held(&sdata->u.mgd.mtx);
3281 assoc_data->tries++;
3282 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3283 sdata_info(sdata, "association with %pM timed out\n",
3284 assoc_data->bss->bssid);
3287 * Most likely AP is not in the range so remove the
3288 * bss struct for that AP.
3290 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3295 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3296 assoc_data->bss->bssid, assoc_data->tries,
3297 IEEE80211_ASSOC_MAX_TRIES);
3298 ieee80211_send_assoc(sdata);
3300 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3301 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3302 assoc_data->timeout_started = true;
3303 run_again(&sdata->u.mgd, assoc_data->timeout);
3305 assoc_data->timeout_started = false;
3311 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3312 __le16 fc, bool acked)
3314 struct ieee80211_local *local = sdata->local;
3316 sdata->u.mgd.status_fc = fc;
3317 sdata->u.mgd.status_acked = acked;
3318 sdata->u.mgd.status_received = true;
3320 ieee80211_queue_work(&local->hw, &sdata->work);
3323 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3325 struct ieee80211_local *local = sdata->local;
3326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3328 mutex_lock(&ifmgd->mtx);
3330 if (ifmgd->status_received) {
3331 __le16 fc = ifmgd->status_fc;
3332 bool status_acked = ifmgd->status_acked;
3334 ifmgd->status_received = false;
3335 if (ifmgd->auth_data &&
3336 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3338 ifmgd->auth_data->timeout =
3339 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3340 run_again(ifmgd, ifmgd->auth_data->timeout);
3342 ifmgd->auth_data->timeout = jiffies - 1;
3344 ifmgd->auth_data->timeout_started = true;
3345 } else if (ifmgd->assoc_data &&
3346 (ieee80211_is_assoc_req(fc) ||
3347 ieee80211_is_reassoc_req(fc))) {
3349 ifmgd->assoc_data->timeout =
3350 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3351 run_again(ifmgd, ifmgd->assoc_data->timeout);
3353 ifmgd->assoc_data->timeout = jiffies - 1;
3355 ifmgd->assoc_data->timeout_started = true;
3359 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3360 time_after(jiffies, ifmgd->auth_data->timeout)) {
3361 if (ifmgd->auth_data->done) {
3363 * ok ... we waited for assoc but userspace didn't,
3364 * so let's just kill the auth data
3366 ieee80211_destroy_auth_data(sdata, false);
3367 } else if (ieee80211_probe_auth(sdata)) {
3370 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3372 ieee80211_destroy_auth_data(sdata, false);
3374 mutex_unlock(&ifmgd->mtx);
3375 cfg80211_send_auth_timeout(sdata->dev, bssid);
3376 mutex_lock(&ifmgd->mtx);
3378 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3379 run_again(ifmgd, ifmgd->auth_data->timeout);
3381 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3382 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3383 if ((ifmgd->assoc_data->need_beacon &&
3384 !ifmgd->assoc_data->have_beacon) ||
3385 ieee80211_do_assoc(sdata)) {
3388 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3390 ieee80211_destroy_assoc_data(sdata, false);
3392 mutex_unlock(&ifmgd->mtx);
3393 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3394 mutex_lock(&ifmgd->mtx);
3396 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3397 run_again(ifmgd, ifmgd->assoc_data->timeout);
3399 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3400 IEEE80211_STA_CONNECTION_POLL) &&
3401 ifmgd->associated) {
3405 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3407 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3408 max_tries = max_nullfunc_tries;
3410 max_tries = max_probe_tries;
3412 /* ACK received for nullfunc probing frame */
3413 if (!ifmgd->probe_send_count)
3414 ieee80211_reset_ap_probe(sdata);
3415 else if (ifmgd->nullfunc_failed) {
3416 if (ifmgd->probe_send_count < max_tries) {
3418 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3419 bssid, ifmgd->probe_send_count,
3421 ieee80211_mgd_probe_ap_send(sdata);
3424 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3426 ieee80211_sta_connection_lost(sdata, bssid,
3427 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3430 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3431 run_again(ifmgd, ifmgd->probe_timeout);
3432 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3434 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3435 bssid, probe_wait_ms);
3436 ieee80211_sta_connection_lost(sdata, bssid,
3437 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3438 } else if (ifmgd->probe_send_count < max_tries) {
3440 "No probe response from AP %pM after %dms, try %d/%i\n",
3441 bssid, probe_wait_ms,
3442 ifmgd->probe_send_count, max_tries);
3443 ieee80211_mgd_probe_ap_send(sdata);
3446 * We actually lost the connection ... or did we?
3449 wiphy_debug(local->hw.wiphy,
3450 "%s: No probe response from AP %pM"
3451 " after %dms, disconnecting.\n",
3453 bssid, probe_wait_ms);
3455 ieee80211_sta_connection_lost(sdata, bssid,
3456 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3460 mutex_unlock(&ifmgd->mtx);
3463 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3465 struct ieee80211_sub_if_data *sdata =
3466 (struct ieee80211_sub_if_data *) data;
3467 struct ieee80211_local *local = sdata->local;
3469 if (local->quiescing)
3472 sdata->u.mgd.connection_loss = false;
3473 ieee80211_queue_work(&sdata->local->hw,
3474 &sdata->u.mgd.beacon_connection_loss_work);
3477 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3479 struct ieee80211_sub_if_data *sdata =
3480 (struct ieee80211_sub_if_data *) data;
3481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3482 struct ieee80211_local *local = sdata->local;
3484 if (local->quiescing)
3487 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3490 static void ieee80211_sta_monitor_work(struct work_struct *work)
3492 struct ieee80211_sub_if_data *sdata =
3493 container_of(work, struct ieee80211_sub_if_data,
3494 u.mgd.monitor_work);
3496 ieee80211_mgd_probe_ap(sdata, false);
3499 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3503 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3504 __ieee80211_stop_poll(sdata);
3506 /* let's probe the connection once */
3507 flags = sdata->local->hw.flags;
3508 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3509 ieee80211_queue_work(&sdata->local->hw,
3510 &sdata->u.mgd.monitor_work);
3511 /* and do all the other regular work too */
3512 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3516 /* interface setup */
3517 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3519 struct ieee80211_if_managed *ifmgd;
3521 ifmgd = &sdata->u.mgd;
3522 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3523 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3524 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3525 ieee80211_beacon_connection_loss_work);
3526 INIT_WORK(&ifmgd->csa_connection_drop_work,
3527 ieee80211_csa_connection_drop_work);
3528 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3529 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3530 (unsigned long) sdata);
3531 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3532 (unsigned long) sdata);
3533 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3534 (unsigned long) sdata);
3535 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3536 (unsigned long) sdata);
3539 ifmgd->powersave = sdata->wdev.ps;
3540 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3541 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3542 ifmgd->p2p_noa_index = -1;
3544 mutex_init(&ifmgd->mtx);
3546 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3547 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3549 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3552 /* scan finished notification */
3553 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3555 struct ieee80211_sub_if_data *sdata;
3557 /* Restart STA timers */
3559 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3560 ieee80211_restart_sta_timer(sdata);
3564 int ieee80211_max_network_latency(struct notifier_block *nb,
3565 unsigned long data, void *dummy)
3567 s32 latency_usec = (s32) data;
3568 struct ieee80211_local *local =
3569 container_of(nb, struct ieee80211_local,
3570 network_latency_notifier);
3572 mutex_lock(&local->iflist_mtx);
3573 ieee80211_recalc_ps(local, latency_usec);
3574 mutex_unlock(&local->iflist_mtx);
3579 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3580 struct cfg80211_bss *cbss)
3582 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3583 const u8 *ht_cap_ie, *vht_cap_ie;
3584 const struct ieee80211_ht_cap *ht_cap;
3585 const struct ieee80211_vht_cap *vht_cap;
3588 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3591 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3592 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3593 ht_cap = (void *)(ht_cap_ie + 2);
3594 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3596 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3597 * "Tx Unequal Modulation Supported" fields.
3601 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3604 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3605 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3609 vht_cap = (void *)(vht_cap_ie + 2);
3610 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3611 for (nss = 8; nss > 0; nss--) {
3612 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3613 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3616 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3617 chains = max(chains, nss);
3623 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3624 struct cfg80211_bss *cbss)
3626 struct ieee80211_local *local = sdata->local;
3627 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3628 const struct ieee80211_ht_operation *ht_oper = NULL;
3629 const struct ieee80211_vht_operation *vht_oper = NULL;
3630 struct ieee80211_supported_band *sband;
3631 struct cfg80211_chan_def chandef;
3634 sband = local->hw.wiphy->bands[cbss->channel->band];
3636 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3637 IEEE80211_STA_DISABLE_80P80MHZ |
3638 IEEE80211_STA_DISABLE_160MHZ);
3642 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3643 sband->ht_cap.ht_supported) {
3644 const u8 *ht_oper_ie, *ht_cap;
3646 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3647 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3648 ht_oper = (void *)(ht_oper_ie + 2);
3650 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3651 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3652 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3657 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3658 sband->vht_cap.vht_supported) {
3659 const u8 *vht_oper_ie, *vht_cap;
3661 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3662 WLAN_EID_VHT_OPERATION);
3663 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3664 vht_oper = (void *)(vht_oper_ie + 2);
3665 if (vht_oper && !ht_oper) {
3668 "AP advertised VHT without HT, disabling both\n");
3669 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3670 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3673 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3674 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3675 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3680 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3685 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3690 /* will change later if needed */
3691 sdata->smps_mode = IEEE80211_SMPS_OFF;
3694 * If this fails (possibly due to channel context sharing
3695 * on incompatible channels, e.g. 80+80 and 160 sharing the
3696 * same control channel) try to use a smaller bandwidth.
3698 ret = ieee80211_vif_use_channel(sdata, &chandef,
3699 IEEE80211_CHANCTX_SHARED);
3700 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3701 ifmgd->flags |= chandef_downgrade(&chandef);
3702 ret = ieee80211_vif_use_channel(sdata, &chandef,
3703 IEEE80211_CHANCTX_SHARED);
3708 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3709 struct cfg80211_bss *cbss, bool assoc)
3711 struct ieee80211_local *local = sdata->local;
3712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3713 struct ieee80211_bss *bss = (void *)cbss->priv;
3714 struct sta_info *new_sta = NULL;
3715 bool have_sta = false;
3718 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3723 have_sta = sta_info_get(sdata, cbss->bssid);
3728 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3734 u32 rates = 0, basic_rates = 0;
3735 bool have_higher_than_11mbit;
3736 int min_rate = INT_MAX, min_rate_index = -1;
3737 struct ieee80211_supported_band *sband;
3738 const struct cfg80211_bss_ies *ies;
3740 sband = local->hw.wiphy->bands[cbss->channel->band];
3742 err = ieee80211_prep_channel(sdata, cbss);
3744 sta_info_free(local, new_sta);
3748 ieee80211_get_rates(sband, bss->supp_rates,
3749 bss->supp_rates_len,
3750 &rates, &basic_rates,
3751 &have_higher_than_11mbit,
3752 &min_rate, &min_rate_index);
3755 * This used to be a workaround for basic rates missing
3756 * in the association response frame. Now that we no
3757 * longer use the basic rates from there, it probably
3758 * doesn't happen any more, but keep the workaround so
3759 * in case some *other* APs are buggy in different ways
3760 * we can connect -- with a warning.
3762 if (!basic_rates && min_rate_index >= 0) {
3764 "No basic rates, using min rate instead\n");
3765 basic_rates = BIT(min_rate_index);
3768 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3769 sdata->vif.bss_conf.basic_rates = basic_rates;
3771 /* cf. IEEE 802.11 9.2.12 */
3772 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3773 have_higher_than_11mbit)
3774 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3776 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3778 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3780 /* set timing information */
3781 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3783 ies = rcu_dereference(cbss->beacon_ies);
3787 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3788 sdata->vif.bss_conf.sync_device_ts =
3789 bss->device_ts_beacon;
3790 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3791 ies->data, ies->len);
3792 if (tim_ie && tim_ie[1] >= 2)
3793 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3795 sdata->vif.bss_conf.sync_dtim_count = 0;
3796 } else if (!(local->hw.flags &
3797 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3798 ies = rcu_dereference(cbss->proberesp_ies);
3799 /* must be non-NULL since beacon IEs were NULL */
3800 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3801 sdata->vif.bss_conf.sync_device_ts =
3802 bss->device_ts_presp;
3803 sdata->vif.bss_conf.sync_dtim_count = 0;
3805 sdata->vif.bss_conf.sync_tsf = 0;
3806 sdata->vif.bss_conf.sync_device_ts = 0;
3807 sdata->vif.bss_conf.sync_dtim_count = 0;
3811 /* tell driver about BSSID, basic rates and timing */
3812 ieee80211_bss_info_change_notify(sdata,
3813 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3814 BSS_CHANGED_BEACON_INT);
3817 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3819 err = sta_info_insert(new_sta);
3823 "failed to insert STA entry for the AP (error %d)\n",
3828 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3834 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3835 struct cfg80211_auth_request *req)
3837 struct ieee80211_local *local = sdata->local;
3838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3839 struct ieee80211_mgd_auth_data *auth_data;
3843 /* prepare auth data structure */
3845 switch (req->auth_type) {
3846 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3847 auth_alg = WLAN_AUTH_OPEN;
3849 case NL80211_AUTHTYPE_SHARED_KEY:
3850 if (IS_ERR(local->wep_tx_tfm))
3852 auth_alg = WLAN_AUTH_SHARED_KEY;
3854 case NL80211_AUTHTYPE_FT:
3855 auth_alg = WLAN_AUTH_FT;
3857 case NL80211_AUTHTYPE_NETWORK_EAP:
3858 auth_alg = WLAN_AUTH_LEAP;
3860 case NL80211_AUTHTYPE_SAE:
3861 auth_alg = WLAN_AUTH_SAE;
3867 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3868 req->ie_len, GFP_KERNEL);
3872 auth_data->bss = req->bss;
3874 if (req->sae_data_len >= 4) {
3875 __le16 *pos = (__le16 *) req->sae_data;
3876 auth_data->sae_trans = le16_to_cpu(pos[0]);
3877 auth_data->sae_status = le16_to_cpu(pos[1]);
3878 memcpy(auth_data->data, req->sae_data + 4,
3879 req->sae_data_len - 4);
3880 auth_data->data_len += req->sae_data_len - 4;
3883 if (req->ie && req->ie_len) {
3884 memcpy(&auth_data->data[auth_data->data_len],
3885 req->ie, req->ie_len);
3886 auth_data->data_len += req->ie_len;
3889 if (req->key && req->key_len) {
3890 auth_data->key_len = req->key_len;
3891 auth_data->key_idx = req->key_idx;
3892 memcpy(auth_data->key, req->key, req->key_len);
3895 auth_data->algorithm = auth_alg;
3897 /* try to authenticate/probe */
3899 mutex_lock(&ifmgd->mtx);
3901 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3902 ifmgd->assoc_data) {
3907 if (ifmgd->auth_data)
3908 ieee80211_destroy_auth_data(sdata, false);
3910 /* prep auth_data so we don't go into idle on disassoc */
3911 ifmgd->auth_data = auth_data;
3913 if (ifmgd->associated)
3914 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3916 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
3918 err = ieee80211_prep_connection(sdata, req->bss, false);
3922 err = ieee80211_probe_auth(sdata);
3924 sta_info_destroy_addr(sdata, req->bss->bssid);
3928 /* hold our own reference */
3929 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
3934 memset(ifmgd->bssid, 0, ETH_ALEN);
3935 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3936 ifmgd->auth_data = NULL;
3940 mutex_unlock(&ifmgd->mtx);
3945 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3946 struct cfg80211_assoc_request *req)
3948 struct ieee80211_local *local = sdata->local;
3949 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3950 struct ieee80211_bss *bss = (void *)req->bss->priv;
3951 struct ieee80211_mgd_assoc_data *assoc_data;
3952 const struct cfg80211_bss_ies *beacon_ies;
3953 struct ieee80211_supported_band *sband;
3954 const u8 *ssidie, *ht_ie, *vht_ie;
3957 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3962 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3968 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3969 assoc_data->ssid_len = ssidie[1];
3972 mutex_lock(&ifmgd->mtx);
3974 if (ifmgd->associated)
3975 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3977 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3982 if (ifmgd->assoc_data) {
3987 if (ifmgd->auth_data) {
3990 /* keep sta info, bssid if matching */
3991 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3992 ieee80211_destroy_auth_data(sdata, match);
3995 /* prepare assoc data */
3997 ifmgd->beacon_crc_valid = false;
4000 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4001 * We still associate in non-HT mode (11a/b/g) if any one of these
4002 * ciphers is configured as pairwise.
4003 * We can set this to true for non-11n hardware, that'll be checked
4004 * separately along with the peer capabilities.
4006 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4007 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4008 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4009 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4010 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4011 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4012 netdev_info(sdata->dev,
4013 "disabling HT/VHT due to WEP/TKIP use\n");
4017 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4018 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4019 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4022 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4023 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4025 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4026 sband = local->hw.wiphy->bands[req->bss->channel->band];
4027 if (!sband->ht_cap.ht_supported ||
4028 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4029 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4031 netdev_info(sdata->dev,
4032 "disabling HT as WMM/QoS is not supported by the AP\n");
4035 /* disable VHT if we don't support it or the AP doesn't use WMM */
4036 if (!sband->vht_cap.vht_supported ||
4037 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4038 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4040 netdev_info(sdata->dev,
4041 "disabling VHT as WMM/QoS is not supported by the AP\n");
4044 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4045 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4046 sizeof(ifmgd->ht_capa_mask));
4048 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4049 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4050 sizeof(ifmgd->vht_capa_mask));
4052 if (req->ie && req->ie_len) {
4053 memcpy(assoc_data->ie, req->ie, req->ie_len);
4054 assoc_data->ie_len = req->ie_len;
4057 assoc_data->bss = req->bss;
4059 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4060 if (ifmgd->powersave)
4061 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4063 sdata->smps_mode = IEEE80211_SMPS_OFF;
4065 sdata->smps_mode = ifmgd->req_smps;
4067 assoc_data->capability = req->bss->capability;
4068 assoc_data->wmm = bss->wmm_used &&
4069 (local->hw.queues >= IEEE80211_NUM_ACS);
4070 assoc_data->supp_rates = bss->supp_rates;
4071 assoc_data->supp_rates_len = bss->supp_rates_len;
4074 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4075 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4076 assoc_data->ap_ht_param =
4077 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4079 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4080 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4081 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4082 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4083 sizeof(struct ieee80211_vht_cap));
4085 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4088 if (bss->wmm_used && bss->uapsd_supported &&
4089 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
4090 assoc_data->uapsd = true;
4091 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4093 assoc_data->uapsd = false;
4094 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4097 if (req->prev_bssid)
4098 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4101 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4102 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4104 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4105 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4108 if (req->crypto.control_port)
4109 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4111 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4113 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4114 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4116 /* kick off associate process */
4118 ifmgd->assoc_data = assoc_data;
4119 ifmgd->dtim_period = 0;
4121 err = ieee80211_prep_connection(sdata, req->bss, true);
4126 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4128 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4131 * Wait up to one beacon interval ...
4132 * should this be more if we miss one?
4134 sdata_info(sdata, "waiting for beacon from %pM\n",
4136 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4137 assoc_data->timeout_started = true;
4138 assoc_data->need_beacon = true;
4139 } else if (beacon_ies) {
4140 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4145 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4146 const struct ieee80211_tim_ie *tim;
4147 tim = (void *)(tim_ie + 2);
4148 ifmgd->dtim_period = tim->dtim_period;
4149 dtim_count = tim->dtim_count;
4151 assoc_data->have_beacon = true;
4152 assoc_data->timeout = jiffies;
4153 assoc_data->timeout_started = true;
4155 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4156 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4157 sdata->vif.bss_conf.sync_device_ts =
4158 bss->device_ts_beacon;
4159 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4162 assoc_data->timeout = jiffies;
4163 assoc_data->timeout_started = true;
4167 run_again(ifmgd, assoc_data->timeout);
4169 if (bss->corrupt_data) {
4170 char *corrupt_type = "data";
4171 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4172 if (bss->corrupt_data &
4173 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4174 corrupt_type = "beacon and probe response";
4176 corrupt_type = "beacon";
4177 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4178 corrupt_type = "probe response";
4179 sdata_info(sdata, "associating with AP with corrupt %s\n",
4186 memset(ifmgd->bssid, 0, ETH_ALEN);
4187 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4188 ifmgd->assoc_data = NULL;
4192 mutex_unlock(&ifmgd->mtx);
4197 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4198 struct cfg80211_deauth_request *req)
4200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4201 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4202 bool tx = !req->local_state_change;
4203 bool sent_frame = false;
4205 mutex_lock(&ifmgd->mtx);
4208 "deauthenticating from %pM by local choice (reason=%d)\n",
4209 req->bssid, req->reason_code);
4211 if (ifmgd->auth_data) {
4212 drv_mgd_prepare_tx(sdata->local, sdata);
4213 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4214 IEEE80211_STYPE_DEAUTH,
4215 req->reason_code, tx,
4217 ieee80211_destroy_auth_data(sdata, false);
4218 mutex_unlock(&ifmgd->mtx);
4224 if (ifmgd->associated &&
4225 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4226 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4227 req->reason_code, tx, frame_buf);
4230 mutex_unlock(&ifmgd->mtx);
4234 __cfg80211_send_deauth(sdata->dev, frame_buf,
4235 IEEE80211_DEAUTH_FRAME_LEN);
4240 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4241 struct cfg80211_disassoc_request *req)
4243 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4245 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4247 mutex_lock(&ifmgd->mtx);
4250 * cfg80211 should catch this ... but it's racy since
4251 * we can receive a disassoc frame, process it, hand it
4252 * to cfg80211 while that's in a locked section already
4253 * trying to tell us that the user wants to disconnect.
4255 if (ifmgd->associated != req->bss) {
4256 mutex_unlock(&ifmgd->mtx);
4261 "disassociating from %pM by local choice (reason=%d)\n",
4262 req->bss->bssid, req->reason_code);
4264 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4265 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4266 req->reason_code, !req->local_state_change,
4268 mutex_unlock(&ifmgd->mtx);
4270 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4271 IEEE80211_DEAUTH_FRAME_LEN);
4276 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4281 * Make sure some work items will not run after this,
4282 * they will not do anything but might not have been
4283 * cancelled when disconnecting.
4285 cancel_work_sync(&ifmgd->monitor_work);
4286 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4287 cancel_work_sync(&ifmgd->request_smps_work);
4288 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4289 cancel_work_sync(&ifmgd->chswitch_work);
4291 mutex_lock(&ifmgd->mtx);
4292 if (ifmgd->assoc_data)
4293 ieee80211_destroy_assoc_data(sdata, false);
4294 if (ifmgd->auth_data)
4295 ieee80211_destroy_auth_data(sdata, false);
4296 del_timer_sync(&ifmgd->timer);
4297 mutex_unlock(&ifmgd->mtx);
4300 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4301 enum nl80211_cqm_rssi_threshold_event rssi_event,
4304 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4306 trace_api_cqm_rssi_notify(sdata, rssi_event);
4308 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4310 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);