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 * We can have multiple work items (and connection probing)
95 * scheduling this timer, but we need to take care to only
96 * reschedule it when it should fire _earlier_ than it was
97 * asked for before, or if it's not pending right now. This
98 * function ensures that. Note that it then is required to
99 * run this function for all timeouts after the first one
100 * has happened -- the work that runs from this timer will
103 static void run_again(struct ieee80211_sub_if_data *sdata,
104 unsigned long timeout)
106 sdata_assert_lock(sdata);
108 if (!timer_pending(&sdata->u.mgd.timer) ||
109 time_before(timeout, sdata->u.mgd.timer.expires))
110 mod_timer(&sdata->u.mgd.timer, timeout);
113 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
115 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
118 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
121 mod_timer(&sdata->u.mgd.bcn_mon_timer,
122 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
125 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
127 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
129 if (unlikely(!sdata->u.mgd.associated))
132 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
135 mod_timer(&sdata->u.mgd.conn_mon_timer,
136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
138 ifmgd->probe_send_count = 0;
141 static int ecw2cw(int ecw)
143 return (1 << ecw) - 1;
146 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
152 case NL80211_CHAN_WIDTH_20:
153 c->width = NL80211_CHAN_WIDTH_20_NOHT;
154 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
156 case NL80211_CHAN_WIDTH_40:
157 c->width = NL80211_CHAN_WIDTH_20;
158 c->center_freq1 = c->chan->center_freq;
159 ret = IEEE80211_STA_DISABLE_40MHZ |
160 IEEE80211_STA_DISABLE_VHT;
162 case NL80211_CHAN_WIDTH_80:
163 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
167 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
168 c->width = NL80211_CHAN_WIDTH_40;
169 ret = IEEE80211_STA_DISABLE_VHT;
171 case NL80211_CHAN_WIDTH_80P80:
173 c->width = NL80211_CHAN_WIDTH_80;
174 ret = IEEE80211_STA_DISABLE_80P80MHZ |
175 IEEE80211_STA_DISABLE_160MHZ;
177 case NL80211_CHAN_WIDTH_160:
179 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
182 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
183 c->width = NL80211_CHAN_WIDTH_80;
184 ret = IEEE80211_STA_DISABLE_80P80MHZ |
185 IEEE80211_STA_DISABLE_160MHZ;
188 case NL80211_CHAN_WIDTH_20_NOHT:
190 c->width = NL80211_CHAN_WIDTH_20_NOHT;
191 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
195 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
201 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
202 struct ieee80211_supported_band *sband,
203 struct ieee80211_channel *channel,
204 const struct ieee80211_ht_operation *ht_oper,
205 const struct ieee80211_vht_operation *vht_oper,
206 struct cfg80211_chan_def *chandef, bool verbose)
208 struct cfg80211_chan_def vht_chandef;
211 chandef->chan = channel;
212 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
213 chandef->center_freq1 = channel->center_freq;
214 chandef->center_freq2 = 0;
216 if (!ht_oper || !sband->ht_cap.ht_supported) {
217 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
221 chandef->width = NL80211_CHAN_WIDTH_20;
223 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
225 /* check that channel matches the right operating channel */
226 if (channel->center_freq != ht_cfreq) {
228 * It's possible that some APs are confused here;
229 * Netgear WNDR3700 sometimes reports 4 higher than
230 * the actual channel in association responses, but
231 * since we look at probe response/beacon data here
236 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
237 channel->center_freq, ht_cfreq,
238 ht_oper->primary_chan, channel->band);
239 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
243 /* check 40 MHz support, if we have it */
244 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
245 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
246 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
247 chandef->width = NL80211_CHAN_WIDTH_40;
248 chandef->center_freq1 += 10;
250 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
251 chandef->width = NL80211_CHAN_WIDTH_40;
252 chandef->center_freq1 -= 10;
256 /* 40 MHz (and 80 MHz) must be supported for VHT */
257 ret = IEEE80211_STA_DISABLE_VHT;
258 /* also mark 40 MHz disabled */
259 ret |= IEEE80211_STA_DISABLE_40MHZ;
263 if (!vht_oper || !sband->vht_cap.vht_supported) {
264 ret = IEEE80211_STA_DISABLE_VHT;
268 vht_chandef.chan = channel;
269 vht_chandef.center_freq1 =
270 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
272 vht_chandef.center_freq2 = 0;
274 switch (vht_oper->chan_width) {
275 case IEEE80211_VHT_CHANWIDTH_USE_HT:
276 vht_chandef.width = chandef->width;
278 case IEEE80211_VHT_CHANWIDTH_80MHZ:
279 vht_chandef.width = NL80211_CHAN_WIDTH_80;
281 case IEEE80211_VHT_CHANWIDTH_160MHZ:
282 vht_chandef.width = NL80211_CHAN_WIDTH_160;
284 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
285 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
286 vht_chandef.center_freq2 =
287 ieee80211_channel_to_frequency(
288 vht_oper->center_freq_seg2_idx,
294 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
295 vht_oper->chan_width);
296 ret = IEEE80211_STA_DISABLE_VHT;
300 if (!cfg80211_chandef_valid(&vht_chandef)) {
303 "AP VHT information is invalid, disable VHT\n");
304 ret = IEEE80211_STA_DISABLE_VHT;
308 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
313 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
316 "AP VHT information doesn't match HT, disable VHT\n");
317 ret = IEEE80211_STA_DISABLE_VHT;
321 *chandef = vht_chandef;
326 /* don't print the message below for VHT mismatch if VHT is disabled */
327 if (ret & IEEE80211_STA_DISABLE_VHT)
328 vht_chandef = *chandef;
330 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
331 IEEE80211_CHAN_DISABLED)) {
332 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
333 ret = IEEE80211_STA_DISABLE_HT |
334 IEEE80211_STA_DISABLE_VHT;
338 ret |= chandef_downgrade(chandef);
341 if (chandef->width != vht_chandef.width && verbose)
343 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
345 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
349 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
350 struct sta_info *sta,
351 const struct ieee80211_ht_operation *ht_oper,
352 const struct ieee80211_vht_operation *vht_oper,
353 const u8 *bssid, u32 *changed)
355 struct ieee80211_local *local = sdata->local;
356 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
357 struct ieee80211_supported_band *sband;
358 struct ieee80211_channel *chan;
359 struct cfg80211_chan_def chandef;
362 enum ieee80211_sta_rx_bandwidth new_sta_bw;
365 /* if HT was/is disabled, don't track any bandwidth changes */
366 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
369 /* don't check VHT if we associated as non-VHT station */
370 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
373 if (WARN_ON_ONCE(!sta))
376 chan = sdata->vif.bss_conf.chandef.chan;
377 sband = local->hw.wiphy->bands[chan->band];
379 /* calculate new channel (type) based on HT/VHT operation IEs */
380 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
381 vht_oper, &chandef, false);
384 * Downgrade the new channel if we associated with restricted
385 * capabilities. For example, if we associated as a 20 MHz STA
386 * to a 40 MHz AP (due to regulatory, capabilities or config
387 * reasons) then switching to a 40 MHz channel now won't do us
388 * any good -- we couldn't use it with the AP.
390 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
391 chandef.width == NL80211_CHAN_WIDTH_80P80)
392 flags |= chandef_downgrade(&chandef);
393 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
394 chandef.width == NL80211_CHAN_WIDTH_160)
395 flags |= chandef_downgrade(&chandef);
396 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
397 chandef.width > NL80211_CHAN_WIDTH_20)
398 flags |= chandef_downgrade(&chandef);
400 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
405 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
406 chandef.center_freq1, chandef.center_freq2);
408 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
409 IEEE80211_STA_DISABLE_VHT |
410 IEEE80211_STA_DISABLE_40MHZ |
411 IEEE80211_STA_DISABLE_80P80MHZ |
412 IEEE80211_STA_DISABLE_160MHZ)) ||
413 !cfg80211_chandef_valid(&chandef)) {
415 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
420 switch (chandef.width) {
421 case NL80211_CHAN_WIDTH_20_NOHT:
422 case NL80211_CHAN_WIDTH_20:
423 new_sta_bw = IEEE80211_STA_RX_BW_20;
425 case NL80211_CHAN_WIDTH_40:
426 new_sta_bw = IEEE80211_STA_RX_BW_40;
428 case NL80211_CHAN_WIDTH_80:
429 new_sta_bw = IEEE80211_STA_RX_BW_80;
431 case NL80211_CHAN_WIDTH_80P80:
432 case NL80211_CHAN_WIDTH_160:
433 new_sta_bw = IEEE80211_STA_RX_BW_160;
439 if (new_sta_bw > sta->cur_max_bandwidth)
440 new_sta_bw = sta->cur_max_bandwidth;
442 if (new_sta_bw < sta->sta.bandwidth) {
443 sta->sta.bandwidth = new_sta_bw;
444 rate_control_rate_update(local, sband, sta,
445 IEEE80211_RC_BW_CHANGED);
448 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
451 "AP %pM changed bandwidth to incompatible one - disconnect\n",
456 if (new_sta_bw > sta->sta.bandwidth) {
457 sta->sta.bandwidth = new_sta_bw;
458 rate_control_rate_update(local, sband, sta,
459 IEEE80211_RC_BW_CHANGED);
462 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
464 /* if bss configuration changed store the new one */
465 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
466 *changed |= BSS_CHANGED_HT;
467 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
473 /* frame sending functions */
475 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
476 struct ieee80211_supported_band *sband,
482 for (i = 0; i < supp_rates_len; i++) {
483 int rate = (supp_rates[i] & 0x7F) * 5;
485 for (j = 0; j < sband->n_bitrates; j++)
486 if (sband->bitrates[j].bitrate == rate) {
496 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
497 struct sk_buff *skb, u8 ap_ht_param,
498 struct ieee80211_supported_band *sband,
499 struct ieee80211_channel *channel,
500 enum ieee80211_smps_mode smps)
503 u32 flags = channel->flags;
505 struct ieee80211_sta_ht_cap ht_cap;
507 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
509 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
510 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
512 /* determine capability flags */
515 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
516 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
517 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
518 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
519 cap &= ~IEEE80211_HT_CAP_SGI_40;
522 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
523 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
524 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
525 cap &= ~IEEE80211_HT_CAP_SGI_40;
531 * If 40 MHz was disabled associate as though we weren't
532 * capable of 40 MHz -- some broken APs will never fall
533 * back to trying to transmit in 20 MHz.
535 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
536 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
537 cap &= ~IEEE80211_HT_CAP_SGI_40;
540 /* set SM PS mode properly */
541 cap &= ~IEEE80211_HT_CAP_SM_PS;
543 case IEEE80211_SMPS_AUTOMATIC:
544 case IEEE80211_SMPS_NUM_MODES:
546 case IEEE80211_SMPS_OFF:
547 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
548 IEEE80211_HT_CAP_SM_PS_SHIFT;
550 case IEEE80211_SMPS_STATIC:
551 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
552 IEEE80211_HT_CAP_SM_PS_SHIFT;
554 case IEEE80211_SMPS_DYNAMIC:
555 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
556 IEEE80211_HT_CAP_SM_PS_SHIFT;
560 /* reserve and fill IE */
561 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
562 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
565 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
567 struct ieee80211_supported_band *sband,
568 struct ieee80211_vht_cap *ap_vht_cap)
572 struct ieee80211_sta_vht_cap vht_cap;
574 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
576 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
577 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
579 /* determine capability flags */
582 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
583 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
584 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
587 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
588 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
589 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
593 * Some APs apparently get confused if our capabilities are better
594 * than theirs, so restrict what we advertise in the assoc request.
596 if (!(ap_vht_cap->vht_cap_info &
597 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
598 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
600 /* reserve and fill IE */
601 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
602 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
605 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
607 struct ieee80211_local *local = sdata->local;
608 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
609 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
611 struct ieee80211_mgmt *mgmt;
613 size_t offset = 0, noffset;
614 int i, count, rates_len, supp_rates_len;
616 struct ieee80211_supported_band *sband;
617 struct ieee80211_chanctx_conf *chanctx_conf;
618 struct ieee80211_channel *chan;
621 sdata_assert_lock(sdata);
624 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
625 if (WARN_ON(!chanctx_conf)) {
629 chan = chanctx_conf->def.chan;
631 sband = local->hw.wiphy->bands[chan->band];
633 if (assoc_data->supp_rates_len) {
635 * Get all rates supported by the device and the AP as
636 * some APs don't like getting a superset of their rates
637 * in the association request (e.g. D-Link DAP 1353 in
640 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
641 assoc_data->supp_rates_len,
645 * In case AP not provide any supported rates information
646 * before association, we send information element(s) with
647 * all rates that we support.
650 rates_len = sband->n_bitrates;
653 skb = alloc_skb(local->hw.extra_tx_headroom +
654 sizeof(*mgmt) + /* bit too much but doesn't matter */
655 2 + assoc_data->ssid_len + /* SSID */
656 4 + rates_len + /* (extended) rates */
657 4 + /* power capability */
658 2 + 2 * sband->n_channels + /* supported channels */
659 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
660 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
661 assoc_data->ie_len + /* extra IEs */
667 skb_reserve(skb, local->hw.extra_tx_headroom);
669 capab = WLAN_CAPABILITY_ESS;
671 if (sband->band == IEEE80211_BAND_2GHZ) {
672 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
673 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
674 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
675 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
678 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
679 capab |= WLAN_CAPABILITY_PRIVACY;
681 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
682 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
683 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
685 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
687 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
688 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
689 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
691 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
693 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
694 IEEE80211_STYPE_REASSOC_REQ);
695 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
696 mgmt->u.reassoc_req.listen_interval =
697 cpu_to_le16(local->hw.conf.listen_interval);
698 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
702 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
703 IEEE80211_STYPE_ASSOC_REQ);
704 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
705 mgmt->u.assoc_req.listen_interval =
706 cpu_to_le16(local->hw.conf.listen_interval);
710 pos = skb_put(skb, 2 + assoc_data->ssid_len);
711 *pos++ = WLAN_EID_SSID;
712 *pos++ = assoc_data->ssid_len;
713 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
715 /* add all rates which were marked to be used above */
716 supp_rates_len = rates_len;
717 if (supp_rates_len > 8)
720 pos = skb_put(skb, supp_rates_len + 2);
721 *pos++ = WLAN_EID_SUPP_RATES;
722 *pos++ = supp_rates_len;
725 for (i = 0; i < sband->n_bitrates; i++) {
726 if (BIT(i) & rates) {
727 int rate = sband->bitrates[i].bitrate;
728 *pos++ = (u8) (rate / 5);
734 if (rates_len > count) {
735 pos = skb_put(skb, rates_len - count + 2);
736 *pos++ = WLAN_EID_EXT_SUPP_RATES;
737 *pos++ = rates_len - count;
739 for (i++; i < sband->n_bitrates; i++) {
740 if (BIT(i) & rates) {
741 int rate = sband->bitrates[i].bitrate;
742 *pos++ = (u8) (rate / 5);
747 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
748 /* 1. power capabilities */
749 pos = skb_put(skb, 4);
750 *pos++ = WLAN_EID_PWR_CAPABILITY;
752 *pos++ = 0; /* min tx power */
753 *pos++ = chan->max_power; /* max tx power */
755 /* 2. supported channels */
756 /* TODO: get this in reg domain format */
757 pos = skb_put(skb, 2 * sband->n_channels + 2);
758 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
759 *pos++ = 2 * sband->n_channels;
760 for (i = 0; i < sband->n_channels; i++) {
761 *pos++ = ieee80211_frequency_to_channel(
762 sband->channels[i].center_freq);
763 *pos++ = 1; /* one channel in the subband*/
767 /* if present, add any custom IEs that go before HT */
768 if (assoc_data->ie_len && assoc_data->ie) {
769 static const u8 before_ht[] = {
772 WLAN_EID_EXT_SUPP_RATES,
773 WLAN_EID_PWR_CAPABILITY,
774 WLAN_EID_SUPPORTED_CHANNELS,
777 WLAN_EID_RRM_ENABLED_CAPABILITIES,
778 WLAN_EID_MOBILITY_DOMAIN,
779 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
781 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
782 before_ht, ARRAY_SIZE(before_ht),
784 pos = skb_put(skb, noffset - offset);
785 memcpy(pos, assoc_data->ie + offset, noffset - offset);
789 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
790 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
791 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
793 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
794 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
795 sband, chan, sdata->smps_mode);
797 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
798 ieee80211_add_vht_ie(sdata, skb, sband,
799 &assoc_data->ap_vht_cap);
801 /* if present, add any custom non-vendor IEs that go after HT */
802 if (assoc_data->ie_len && assoc_data->ie) {
803 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
806 pos = skb_put(skb, noffset - offset);
807 memcpy(pos, assoc_data->ie + offset, noffset - offset);
811 if (assoc_data->wmm) {
812 if (assoc_data->uapsd) {
813 qos_info = ifmgd->uapsd_queues;
814 qos_info |= (ifmgd->uapsd_max_sp_len <<
815 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
820 pos = skb_put(skb, 9);
821 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
822 *pos++ = 7; /* len */
823 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
826 *pos++ = 2; /* WME */
827 *pos++ = 0; /* WME info */
828 *pos++ = 1; /* WME ver */
832 /* add any remaining custom (i.e. vendor specific here) IEs */
833 if (assoc_data->ie_len && assoc_data->ie) {
834 noffset = assoc_data->ie_len;
835 pos = skb_put(skb, noffset - offset);
836 memcpy(pos, assoc_data->ie + offset, noffset - offset);
839 drv_mgd_prepare_tx(local, sdata);
841 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
842 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
843 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
844 IEEE80211_TX_INTFL_MLME_CONN_TX;
845 ieee80211_tx_skb(sdata, skb);
848 void ieee80211_send_pspoll(struct ieee80211_local *local,
849 struct ieee80211_sub_if_data *sdata)
851 struct ieee80211_pspoll *pspoll;
854 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
858 pspoll = (struct ieee80211_pspoll *) skb->data;
859 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
861 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
862 ieee80211_tx_skb(sdata, skb);
865 void ieee80211_send_nullfunc(struct ieee80211_local *local,
866 struct ieee80211_sub_if_data *sdata,
870 struct ieee80211_hdr_3addr *nullfunc;
871 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
873 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
877 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
879 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
881 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
882 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
884 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
885 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
887 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
888 IEEE80211_STA_CONNECTION_POLL))
889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
891 ieee80211_tx_skb(sdata, skb);
894 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
895 struct ieee80211_sub_if_data *sdata)
898 struct ieee80211_hdr *nullfunc;
901 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
904 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
908 skb_reserve(skb, local->hw.extra_tx_headroom);
910 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
911 memset(nullfunc, 0, 30);
912 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
913 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
914 nullfunc->frame_control = fc;
915 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
916 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
917 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
918 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
920 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
921 ieee80211_tx_skb(sdata, skb);
924 /* spectrum management related things */
925 static void ieee80211_chswitch_work(struct work_struct *work)
927 struct ieee80211_sub_if_data *sdata =
928 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
929 struct ieee80211_local *local = sdata->local;
930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
932 if (!ieee80211_sdata_running(sdata))
936 if (!ifmgd->associated)
939 local->_oper_chandef = local->csa_chandef;
941 if (!local->ops->channel_switch) {
942 /* call "hw_config" only if doing sw channel switch */
943 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
945 /* update the device channel directly */
946 local->hw.conf.chandef = local->_oper_chandef;
949 /* XXX: shouldn't really modify cfg80211-owned data! */
950 ifmgd->associated->channel = local->_oper_chandef.chan;
952 /* XXX: wait for a beacon first? */
953 ieee80211_wake_queues_by_reason(&local->hw,
954 IEEE80211_MAX_QUEUE_MAP,
955 IEEE80211_QUEUE_STOP_REASON_CSA);
957 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
961 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
963 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
964 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
966 trace_api_chswitch_done(sdata, success);
969 "driver channel switch failed, disconnecting\n");
970 ieee80211_queue_work(&sdata->local->hw,
971 &ifmgd->csa_connection_drop_work);
973 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
976 EXPORT_SYMBOL(ieee80211_chswitch_done);
978 static void ieee80211_chswitch_timer(unsigned long data)
980 struct ieee80211_sub_if_data *sdata =
981 (struct ieee80211_sub_if_data *) data;
983 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
987 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
988 u64 timestamp, struct ieee802_11_elems *elems,
991 struct ieee80211_local *local = sdata->local;
992 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
993 struct cfg80211_bss *cbss = ifmgd->associated;
994 struct ieee80211_bss *bss;
995 struct ieee80211_chanctx *chanctx;
996 enum ieee80211_band new_band;
1001 struct ieee80211_channel *new_chan;
1002 struct cfg80211_chan_def new_chandef = {};
1003 struct cfg80211_chan_def new_vht_chandef = {};
1004 const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1005 const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1006 const struct ieee80211_ht_operation *ht_oper;
1007 int secondary_channel_offset = -1;
1009 sdata_assert_lock(sdata);
1014 if (local->scanning)
1017 /* disregard subsequent announcements if we are already processing */
1018 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1021 sec_chan_offs = elems->sec_chan_offs;
1022 wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1023 ht_oper = elems->ht_operation;
1025 if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1026 IEEE80211_STA_DISABLE_40MHZ)) {
1027 sec_chan_offs = NULL;
1028 wide_bw_chansw_ie = NULL;
1029 /* only used for bandwidth here */
1033 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1034 wide_bw_chansw_ie = NULL;
1036 if (elems->ext_chansw_ie) {
1037 if (!ieee80211_operating_class_to_band(
1038 elems->ext_chansw_ie->new_operating_class,
1041 "cannot understand ECSA IE operating class %d, disconnecting\n",
1042 elems->ext_chansw_ie->new_operating_class);
1043 ieee80211_queue_work(&local->hw,
1044 &ifmgd->csa_connection_drop_work);
1046 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1047 count = elems->ext_chansw_ie->count;
1048 mode = elems->ext_chansw_ie->mode;
1049 } else if (elems->ch_switch_ie) {
1050 new_band = cbss->channel->band;
1051 new_chan_no = elems->ch_switch_ie->new_ch_num;
1052 count = elems->ch_switch_ie->count;
1053 mode = elems->ch_switch_ie->mode;
1055 /* nothing here we understand */
1059 bss = (void *)cbss->priv;
1061 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1062 new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1063 if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1065 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1066 ifmgd->associated->bssid, new_freq);
1067 ieee80211_queue_work(&local->hw,
1068 &ifmgd->csa_connection_drop_work);
1072 if (!beacon && sec_chan_offs) {
1073 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1074 } else if (beacon && ht_oper) {
1075 secondary_channel_offset =
1076 ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
1077 } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1079 * If it's not a beacon, HT is enabled and the IE not present,
1080 * it's 20 MHz, 802.11-2012 8.5.2.6:
1081 * This element [the Secondary Channel Offset Element] is
1082 * present when switching to a 40 MHz channel. It may be
1083 * present when switching to a 20 MHz channel (in which
1084 * case the secondary channel offset is set to SCN).
1086 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1089 switch (secondary_channel_offset) {
1091 /* secondary_channel_offset was present but is invalid */
1092 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1093 cfg80211_chandef_create(&new_chandef, new_chan,
1096 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1097 cfg80211_chandef_create(&new_chandef, new_chan,
1098 NL80211_CHAN_HT40PLUS);
1100 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1101 cfg80211_chandef_create(&new_chandef, new_chan,
1102 NL80211_CHAN_HT40MINUS);
1105 cfg80211_chandef_create(&new_chandef, new_chan,
1106 NL80211_CHAN_NO_HT);
1110 if (wide_bw_chansw_ie) {
1111 new_vht_chandef.chan = new_chan;
1112 new_vht_chandef.center_freq1 =
1113 ieee80211_channel_to_frequency(
1114 wide_bw_chansw_ie->new_center_freq_seg0,
1117 switch (wide_bw_chansw_ie->new_channel_width) {
1119 /* hmmm, ignore VHT and use HT if present */
1120 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1121 new_vht_chandef.chan = NULL;
1123 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1124 new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1126 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1127 new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1129 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1130 /* field is otherwise reserved */
1131 new_vht_chandef.center_freq2 =
1132 ieee80211_channel_to_frequency(
1133 wide_bw_chansw_ie->new_center_freq_seg1,
1135 new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1138 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1139 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1140 chandef_downgrade(&new_vht_chandef);
1141 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1142 new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1143 chandef_downgrade(&new_vht_chandef);
1144 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1145 new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1146 chandef_downgrade(&new_vht_chandef);
1149 /* if VHT data is there validate & use it */
1150 if (new_vht_chandef.chan) {
1151 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1154 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1155 ifmgd->associated->bssid);
1156 ieee80211_queue_work(&local->hw,
1157 &ifmgd->csa_connection_drop_work);
1160 new_chandef = new_vht_chandef;
1163 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1164 IEEE80211_CHAN_DISABLED)) {
1166 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1167 ifmgd->associated->bssid, new_freq,
1168 new_chandef.width, new_chandef.center_freq1,
1169 new_chandef.center_freq2);
1170 ieee80211_queue_work(&local->hw,
1171 &ifmgd->csa_connection_drop_work);
1175 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1177 if (local->use_chanctx) {
1179 "not handling channel switch with channel contexts\n");
1180 ieee80211_queue_work(&local->hw,
1181 &ifmgd->csa_connection_drop_work);
1185 mutex_lock(&local->chanctx_mtx);
1186 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1187 mutex_unlock(&local->chanctx_mtx);
1190 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1191 struct ieee80211_chanctx, conf);
1192 if (chanctx->refcount > 1) {
1194 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1195 ieee80211_queue_work(&local->hw,
1196 &ifmgd->csa_connection_drop_work);
1197 mutex_unlock(&local->chanctx_mtx);
1200 mutex_unlock(&local->chanctx_mtx);
1202 local->csa_chandef = new_chandef;
1205 ieee80211_stop_queues_by_reason(&local->hw,
1206 IEEE80211_MAX_QUEUE_MAP,
1207 IEEE80211_QUEUE_STOP_REASON_CSA);
1209 if (local->ops->channel_switch) {
1210 /* use driver's channel switch callback */
1211 struct ieee80211_channel_switch ch_switch = {
1212 .timestamp = timestamp,
1214 .chandef = new_chandef,
1218 drv_channel_switch(local, &ch_switch);
1222 /* channel switch handled in software */
1224 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1226 mod_timer(&ifmgd->chswitch_timer,
1227 TU_TO_EXP_TIME(count * cbss->beacon_interval));
1230 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1231 struct ieee80211_channel *channel,
1232 const u8 *country_ie, u8 country_ie_len,
1233 const u8 *pwr_constr_elem)
1235 struct ieee80211_country_ie_triplet *triplet;
1236 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1237 int i, chan_pwr, chan_increment, new_ap_level;
1238 bool have_chan_pwr = false;
1241 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1244 triplet = (void *)(country_ie + 3);
1245 country_ie_len -= 3;
1247 switch (channel->band) {
1251 case IEEE80211_BAND_2GHZ:
1252 case IEEE80211_BAND_60GHZ:
1255 case IEEE80211_BAND_5GHZ:
1261 while (country_ie_len >= 3) {
1262 u8 first_channel = triplet->chans.first_channel;
1264 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1267 for (i = 0; i < triplet->chans.num_channels; i++) {
1268 if (first_channel + i * chan_increment == chan) {
1269 have_chan_pwr = true;
1270 chan_pwr = triplet->chans.max_power;
1279 country_ie_len -= 3;
1285 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1287 if (sdata->ap_power_level == new_ap_level)
1291 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1292 new_ap_level, chan_pwr, *pwr_constr_elem,
1293 sdata->u.mgd.bssid);
1294 sdata->ap_power_level = new_ap_level;
1295 if (__ieee80211_recalc_txpower(sdata))
1296 return BSS_CHANGED_TXPOWER;
1301 static void ieee80211_enable_ps(struct ieee80211_local *local,
1302 struct ieee80211_sub_if_data *sdata)
1304 struct ieee80211_conf *conf = &local->hw.conf;
1307 * If we are scanning right now then the parameters will
1308 * take effect when scan finishes.
1310 if (local->scanning)
1313 if (conf->dynamic_ps_timeout > 0 &&
1314 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1315 mod_timer(&local->dynamic_ps_timer, jiffies +
1316 msecs_to_jiffies(conf->dynamic_ps_timeout));
1318 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1319 ieee80211_send_nullfunc(local, sdata, 1);
1321 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1322 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1325 conf->flags |= IEEE80211_CONF_PS;
1326 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1330 static void ieee80211_change_ps(struct ieee80211_local *local)
1332 struct ieee80211_conf *conf = &local->hw.conf;
1334 if (local->ps_sdata) {
1335 ieee80211_enable_ps(local, local->ps_sdata);
1336 } else if (conf->flags & IEEE80211_CONF_PS) {
1337 conf->flags &= ~IEEE80211_CONF_PS;
1338 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1339 del_timer_sync(&local->dynamic_ps_timer);
1340 cancel_work_sync(&local->dynamic_ps_enable_work);
1344 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1346 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1347 struct sta_info *sta = NULL;
1348 bool authorized = false;
1350 if (!mgd->powersave)
1356 if (!mgd->associated)
1359 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1360 IEEE80211_STA_CONNECTION_POLL))
1363 if (!mgd->have_beacon)
1367 sta = sta_info_get(sdata, mgd->bssid);
1369 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1375 /* need to hold RTNL or interface lock */
1376 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1378 struct ieee80211_sub_if_data *sdata, *found = NULL;
1382 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1383 local->ps_sdata = NULL;
1387 list_for_each_entry(sdata, &local->interfaces, list) {
1388 if (!ieee80211_sdata_running(sdata))
1390 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1391 /* If an AP vif is found, then disable PS
1392 * by setting the count to zero thereby setting
1398 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1404 if (count == 1 && ieee80211_powersave_allowed(found)) {
1408 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1410 beaconint_us = ieee80211_tu_to_usec(
1411 found->vif.bss_conf.beacon_int);
1413 timeout = local->dynamic_ps_forced_timeout;
1416 * Go to full PSM if the user configures a very low
1417 * latency requirement.
1418 * The 2000 second value is there for compatibility
1419 * until the PM_QOS_NETWORK_LATENCY is configured
1422 if (latency > (1900 * USEC_PER_MSEC) &&
1423 latency != (2000 * USEC_PER_SEC))
1428 local->hw.conf.dynamic_ps_timeout = timeout;
1430 if (beaconint_us > latency) {
1431 local->ps_sdata = NULL;
1434 u8 dtimper = found->u.mgd.dtim_period;
1436 /* If the TIM IE is invalid, pretend the value is 1 */
1439 else if (dtimper > 1)
1440 maxslp = min_t(int, dtimper,
1441 latency / beaconint_us);
1443 local->hw.conf.max_sleep_period = maxslp;
1444 local->hw.conf.ps_dtim_period = dtimper;
1445 local->ps_sdata = found;
1448 local->ps_sdata = NULL;
1451 ieee80211_change_ps(local);
1454 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1456 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1458 if (sdata->vif.bss_conf.ps != ps_allowed) {
1459 sdata->vif.bss_conf.ps = ps_allowed;
1460 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1464 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1466 struct ieee80211_local *local =
1467 container_of(work, struct ieee80211_local,
1468 dynamic_ps_disable_work);
1470 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1471 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1472 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1475 ieee80211_wake_queues_by_reason(&local->hw,
1476 IEEE80211_MAX_QUEUE_MAP,
1477 IEEE80211_QUEUE_STOP_REASON_PS);
1480 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1482 struct ieee80211_local *local =
1483 container_of(work, struct ieee80211_local,
1484 dynamic_ps_enable_work);
1485 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1486 struct ieee80211_if_managed *ifmgd;
1487 unsigned long flags;
1490 /* can only happen when PS was just disabled anyway */
1494 ifmgd = &sdata->u.mgd;
1496 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1499 if (local->hw.conf.dynamic_ps_timeout > 0) {
1500 /* don't enter PS if TX frames are pending */
1501 if (drv_tx_frames_pending(local)) {
1502 mod_timer(&local->dynamic_ps_timer, jiffies +
1504 local->hw.conf.dynamic_ps_timeout));
1509 * transmission can be stopped by others which leads to
1510 * dynamic_ps_timer expiry. Postpone the ps timer if it
1511 * is not the actual idle state.
1513 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1514 for (q = 0; q < local->hw.queues; q++) {
1515 if (local->queue_stop_reasons[q]) {
1516 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1518 mod_timer(&local->dynamic_ps_timer, jiffies +
1520 local->hw.conf.dynamic_ps_timeout));
1524 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1527 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1528 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1529 if (drv_tx_frames_pending(local)) {
1530 mod_timer(&local->dynamic_ps_timer, jiffies +
1532 local->hw.conf.dynamic_ps_timeout));
1534 ieee80211_send_nullfunc(local, sdata, 1);
1535 /* Flush to get the tx status of nullfunc frame */
1536 ieee80211_flush_queues(local, sdata);
1540 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1541 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1542 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1543 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1544 local->hw.conf.flags |= IEEE80211_CONF_PS;
1545 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1549 void ieee80211_dynamic_ps_timer(unsigned long data)
1551 struct ieee80211_local *local = (void *) data;
1553 if (local->quiescing || local->suspended)
1556 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1559 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1561 struct delayed_work *delayed_work =
1562 container_of(work, struct delayed_work, work);
1563 struct ieee80211_sub_if_data *sdata =
1564 container_of(delayed_work, struct ieee80211_sub_if_data,
1565 dfs_cac_timer_work);
1567 ieee80211_vif_release_channel(sdata);
1569 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1573 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1574 struct ieee80211_sub_if_data *sdata,
1575 const u8 *wmm_param, size_t wmm_param_len)
1577 struct ieee80211_tx_queue_params params;
1578 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1582 u8 uapsd_queues = 0;
1584 if (!local->ops->conf_tx)
1587 if (local->hw.queues < IEEE80211_NUM_ACS)
1593 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1596 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1597 uapsd_queues = ifmgd->uapsd_queues;
1599 count = wmm_param[6] & 0x0f;
1600 if (count == ifmgd->wmm_last_param_set)
1602 ifmgd->wmm_last_param_set = count;
1604 pos = wmm_param + 8;
1605 left = wmm_param_len - 8;
1607 memset(¶ms, 0, sizeof(params));
1610 for (; left >= 4; left -= 4, pos += 4) {
1611 int aci = (pos[0] >> 5) & 0x03;
1612 int acm = (pos[0] >> 4) & 0x01;
1620 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1621 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1627 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1628 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1634 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1635 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1642 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1643 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1648 params.aifs = pos[0] & 0x0f;
1649 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1650 params.cw_min = ecw2cw(pos[1] & 0x0f);
1651 params.txop = get_unaligned_le16(pos + 2);
1653 params.uapsd = uapsd;
1656 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1658 params.aifs, params.cw_min, params.cw_max,
1659 params.txop, params.uapsd);
1660 sdata->tx_conf[queue] = params;
1661 if (drv_conf_tx(local, sdata, queue, ¶ms))
1663 "failed to set TX queue parameters for queue %d\n",
1667 /* enable WMM or activate new settings */
1668 sdata->vif.bss_conf.qos = true;
1672 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1674 lockdep_assert_held(&sdata->local->mtx);
1676 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1677 IEEE80211_STA_BEACON_POLL);
1678 ieee80211_run_deferred_scan(sdata->local);
1681 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1683 mutex_lock(&sdata->local->mtx);
1684 __ieee80211_stop_poll(sdata);
1685 mutex_unlock(&sdata->local->mtx);
1688 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1689 u16 capab, bool erp_valid, u8 erp)
1691 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1693 bool use_protection;
1694 bool use_short_preamble;
1695 bool use_short_slot;
1698 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1699 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1701 use_protection = false;
1702 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1705 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1706 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1707 use_short_slot = true;
1709 if (use_protection != bss_conf->use_cts_prot) {
1710 bss_conf->use_cts_prot = use_protection;
1711 changed |= BSS_CHANGED_ERP_CTS_PROT;
1714 if (use_short_preamble != bss_conf->use_short_preamble) {
1715 bss_conf->use_short_preamble = use_short_preamble;
1716 changed |= BSS_CHANGED_ERP_PREAMBLE;
1719 if (use_short_slot != bss_conf->use_short_slot) {
1720 bss_conf->use_short_slot = use_short_slot;
1721 changed |= BSS_CHANGED_ERP_SLOT;
1727 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1728 struct cfg80211_bss *cbss,
1729 u32 bss_info_changed)
1731 struct ieee80211_bss *bss = (void *)cbss->priv;
1732 struct ieee80211_local *local = sdata->local;
1733 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1735 bss_info_changed |= BSS_CHANGED_ASSOC;
1736 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1737 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1739 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1740 beacon_loss_count * bss_conf->beacon_int));
1742 sdata->u.mgd.associated = cbss;
1743 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1745 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1747 if (sdata->vif.p2p) {
1748 const struct cfg80211_bss_ies *ies;
1751 ies = rcu_dereference(cbss->ies);
1755 ret = cfg80211_get_p2p_attr(
1756 ies->data, ies->len,
1757 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1758 (u8 *) &bss_conf->p2p_noa_attr,
1759 sizeof(bss_conf->p2p_noa_attr));
1761 sdata->u.mgd.p2p_noa_index =
1762 bss_conf->p2p_noa_attr.index;
1763 bss_info_changed |= BSS_CHANGED_P2P_PS;
1769 /* just to be sure */
1770 ieee80211_stop_poll(sdata);
1772 ieee80211_led_assoc(local, 1);
1774 if (sdata->u.mgd.have_beacon) {
1776 * If the AP is buggy we may get here with no DTIM period
1777 * known, so assume it's 1 which is the only safe assumption
1778 * in that case, although if the TIM IE is broken powersave
1779 * probably just won't work at all.
1781 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1782 bss_conf->beacon_rate = bss->beacon_rate;
1783 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1785 bss_conf->beacon_rate = NULL;
1786 bss_conf->dtim_period = 0;
1789 bss_conf->assoc = 1;
1791 /* Tell the driver to monitor connection quality (if supported) */
1792 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1793 bss_conf->cqm_rssi_thold)
1794 bss_info_changed |= BSS_CHANGED_CQM;
1796 /* Enable ARP filtering */
1797 if (bss_conf->arp_addr_cnt)
1798 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1800 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1802 mutex_lock(&local->iflist_mtx);
1803 ieee80211_recalc_ps(local, -1);
1804 mutex_unlock(&local->iflist_mtx);
1806 ieee80211_recalc_smps(sdata);
1807 ieee80211_recalc_ps_vif(sdata);
1809 netif_carrier_on(sdata->dev);
1812 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1813 u16 stype, u16 reason, bool tx,
1816 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1817 struct ieee80211_local *local = sdata->local;
1820 sdata_assert_lock(sdata);
1822 if (WARN_ON_ONCE(tx && !frame_buf))
1825 if (WARN_ON(!ifmgd->associated))
1828 ieee80211_stop_poll(sdata);
1830 ifmgd->associated = NULL;
1831 netif_carrier_off(sdata->dev);
1834 * if we want to get out of ps before disassoc (why?) we have
1835 * to do it before sending disassoc, as otherwise the null-packet
1838 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1839 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1840 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1842 local->ps_sdata = NULL;
1844 /* disable per-vif ps */
1845 ieee80211_recalc_ps_vif(sdata);
1847 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1849 ieee80211_flush_queues(local, sdata);
1851 /* deauthenticate/disassociate now */
1852 if (tx || frame_buf)
1853 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1854 reason, tx, frame_buf);
1856 /* flush out frame */
1858 ieee80211_flush_queues(local, sdata);
1860 /* clear bssid only after building the needed mgmt frames */
1861 memset(ifmgd->bssid, 0, ETH_ALEN);
1863 /* remove AP and TDLS peers */
1864 sta_info_flush_defer(sdata);
1866 /* finally reset all BSS / config parameters */
1867 changed |= ieee80211_reset_erp_info(sdata);
1869 ieee80211_led_assoc(local, 0);
1870 changed |= BSS_CHANGED_ASSOC;
1871 sdata->vif.bss_conf.assoc = false;
1873 ifmgd->p2p_noa_index = -1;
1874 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1875 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1877 /* on the next assoc, re-program HT/VHT parameters */
1878 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1879 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1880 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1881 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1883 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1885 del_timer_sync(&local->dynamic_ps_timer);
1886 cancel_work_sync(&local->dynamic_ps_enable_work);
1888 /* Disable ARP filtering */
1889 if (sdata->vif.bss_conf.arp_addr_cnt)
1890 changed |= BSS_CHANGED_ARP_FILTER;
1892 sdata->vif.bss_conf.qos = false;
1893 changed |= BSS_CHANGED_QOS;
1895 /* The BSSID (not really interesting) and HT changed */
1896 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1897 ieee80211_bss_info_change_notify(sdata, changed);
1899 /* disassociated - set to defaults now */
1900 ieee80211_set_wmm_default(sdata, false);
1902 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1903 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1904 del_timer_sync(&sdata->u.mgd.timer);
1905 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1907 sdata->vif.bss_conf.dtim_period = 0;
1908 sdata->vif.bss_conf.beacon_rate = NULL;
1910 ifmgd->have_beacon = false;
1913 ieee80211_vif_release_channel(sdata);
1916 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1917 struct ieee80211_hdr *hdr)
1920 * We can postpone the mgd.timer whenever receiving unicast frames
1921 * from AP because we know that the connection is working both ways
1922 * at that time. But multicast frames (and hence also beacons) must
1923 * be ignored here, because we need to trigger the timer during
1924 * data idle periods for sending the periodic probe request to the
1925 * AP we're connected to.
1927 if (is_multicast_ether_addr(hdr->addr1))
1930 ieee80211_sta_reset_conn_monitor(sdata);
1933 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1935 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1936 struct ieee80211_local *local = sdata->local;
1938 mutex_lock(&local->mtx);
1939 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1940 IEEE80211_STA_CONNECTION_POLL))) {
1941 mutex_unlock(&local->mtx);
1945 __ieee80211_stop_poll(sdata);
1947 mutex_lock(&local->iflist_mtx);
1948 ieee80211_recalc_ps(local, -1);
1949 mutex_unlock(&local->iflist_mtx);
1951 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1955 * We've received a probe response, but are not sure whether
1956 * we have or will be receiving any beacons or data, so let's
1957 * schedule the timers again, just in case.
1959 ieee80211_sta_reset_beacon_monitor(sdata);
1961 mod_timer(&ifmgd->conn_mon_timer,
1962 round_jiffies_up(jiffies +
1963 IEEE80211_CONNECTION_IDLE_TIME));
1965 mutex_unlock(&local->mtx);
1968 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1969 struct ieee80211_hdr *hdr, bool ack)
1971 if (!ieee80211_is_data(hdr->frame_control))
1974 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1975 sdata->u.mgd.probe_send_count > 0) {
1977 ieee80211_sta_reset_conn_monitor(sdata);
1979 sdata->u.mgd.nullfunc_failed = true;
1980 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1985 ieee80211_sta_reset_conn_monitor(sdata);
1988 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1992 u8 *dst = ifmgd->associated->bssid;
1993 u8 unicast_limit = max(1, max_probe_tries - 3);
1996 * Try sending broadcast probe requests for the last three
1997 * probe requests after the first ones failed since some
1998 * buggy APs only support broadcast probe requests.
2000 if (ifmgd->probe_send_count >= unicast_limit)
2004 * When the hardware reports an accurate Tx ACK status, it's
2005 * better to send a nullfunc frame instead of a probe request,
2006 * as it will kick us off the AP quickly if we aren't associated
2007 * anymore. The timeout will be reset if the frame is ACKed by
2010 ifmgd->probe_send_count++;
2012 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2013 ifmgd->nullfunc_failed = false;
2014 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2019 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2020 if (WARN_ON_ONCE(ssid == NULL))
2025 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2026 0, (u32) -1, true, 0,
2027 ifmgd->associated->channel, false);
2031 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2032 run_again(sdata, ifmgd->probe_timeout);
2033 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2034 ieee80211_flush_queues(sdata->local, sdata);
2037 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2041 bool already = false;
2043 if (!ieee80211_sdata_running(sdata))
2048 if (!ifmgd->associated)
2051 mutex_lock(&sdata->local->mtx);
2053 if (sdata->local->tmp_channel || sdata->local->scanning) {
2054 mutex_unlock(&sdata->local->mtx);
2059 mlme_dbg_ratelimited(sdata,
2060 "detected beacon loss from AP (missed %d beacons) - probing\n",
2063 ieee80211_cqm_rssi_notify(&sdata->vif,
2064 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2069 * The driver/our work has already reported this event or the
2070 * connection monitoring has kicked in and we have already sent
2071 * a probe request. Or maybe the AP died and the driver keeps
2072 * reporting until we disassociate...
2074 * In either case we have to ignore the current call to this
2075 * function (except for setting the correct probe reason bit)
2076 * because otherwise we would reset the timer every time and
2077 * never check whether we received a probe response!
2079 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2080 IEEE80211_STA_CONNECTION_POLL))
2084 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2086 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2088 mutex_unlock(&sdata->local->mtx);
2093 mutex_lock(&sdata->local->iflist_mtx);
2094 ieee80211_recalc_ps(sdata->local, -1);
2095 mutex_unlock(&sdata->local->iflist_mtx);
2097 ifmgd->probe_send_count = 0;
2098 ieee80211_mgd_probe_ap_send(sdata);
2100 sdata_unlock(sdata);
2103 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2104 struct ieee80211_vif *vif)
2106 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2108 struct cfg80211_bss *cbss;
2109 struct sk_buff *skb;
2113 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2116 sdata_assert_lock(sdata);
2118 if (ifmgd->associated)
2119 cbss = ifmgd->associated;
2120 else if (ifmgd->auth_data)
2121 cbss = ifmgd->auth_data->bss;
2122 else if (ifmgd->assoc_data)
2123 cbss = ifmgd->assoc_data->bss;
2128 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2129 if (WARN_ON_ONCE(ssid == NULL))
2134 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2135 (u32) -1, cbss->channel,
2142 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2144 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2147 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2150 if (!ifmgd->associated) {
2151 sdata_unlock(sdata);
2155 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2156 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2158 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2159 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2160 IEEE80211_MAX_QUEUE_MAP,
2161 IEEE80211_QUEUE_STOP_REASON_CSA);
2163 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2164 IEEE80211_DEAUTH_FRAME_LEN);
2165 sdata_unlock(sdata);
2168 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2170 struct ieee80211_sub_if_data *sdata =
2171 container_of(work, struct ieee80211_sub_if_data,
2172 u.mgd.beacon_connection_loss_work);
2173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2174 struct sta_info *sta;
2176 if (ifmgd->associated) {
2178 sta = sta_info_get(sdata, ifmgd->bssid);
2180 sta->beacon_loss_count++;
2184 if (ifmgd->connection_loss) {
2185 sdata_info(sdata, "Connection to AP %pM lost\n",
2187 __ieee80211_disconnect(sdata);
2189 ieee80211_mgd_probe_ap(sdata, true);
2193 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2195 struct ieee80211_sub_if_data *sdata =
2196 container_of(work, struct ieee80211_sub_if_data,
2197 u.mgd.csa_connection_drop_work);
2199 __ieee80211_disconnect(sdata);
2202 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2204 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2205 struct ieee80211_hw *hw = &sdata->local->hw;
2207 trace_api_beacon_loss(sdata);
2209 sdata->u.mgd.connection_loss = false;
2210 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2212 EXPORT_SYMBOL(ieee80211_beacon_loss);
2214 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2216 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2217 struct ieee80211_hw *hw = &sdata->local->hw;
2219 trace_api_connection_loss(sdata);
2221 sdata->u.mgd.connection_loss = true;
2222 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2224 EXPORT_SYMBOL(ieee80211_connection_loss);
2227 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2230 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2232 sdata_assert_lock(sdata);
2235 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2237 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2238 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2239 sdata->u.mgd.flags = 0;
2240 ieee80211_vif_release_channel(sdata);
2243 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2245 sdata->u.mgd.auth_data = NULL;
2248 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2249 struct ieee80211_mgmt *mgmt, size_t len)
2251 struct ieee80211_local *local = sdata->local;
2252 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2254 struct ieee802_11_elems elems;
2257 pos = mgmt->u.auth.variable;
2258 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2259 if (!elems.challenge)
2261 auth_data->expected_transaction = 4;
2262 drv_mgd_prepare_tx(sdata->local, sdata);
2263 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2264 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2265 IEEE80211_TX_INTFL_MLME_CONN_TX;
2266 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2267 elems.challenge - 2, elems.challenge_len + 2,
2268 auth_data->bss->bssid, auth_data->bss->bssid,
2269 auth_data->key, auth_data->key_len,
2270 auth_data->key_idx, tx_flags);
2273 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2274 struct ieee80211_mgmt *mgmt, size_t len)
2276 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2278 u16 auth_alg, auth_transaction, status_code;
2279 struct sta_info *sta;
2281 sdata_assert_lock(sdata);
2286 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2289 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2291 if (!ether_addr_equal(bssid, mgmt->bssid))
2294 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2295 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2296 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2298 if (auth_alg != ifmgd->auth_data->algorithm ||
2299 auth_transaction != ifmgd->auth_data->expected_transaction) {
2300 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2301 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2303 ifmgd->auth_data->expected_transaction);
2307 if (status_code != WLAN_STATUS_SUCCESS) {
2308 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2309 mgmt->sa, status_code);
2310 ieee80211_destroy_auth_data(sdata, false);
2311 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2315 switch (ifmgd->auth_data->algorithm) {
2316 case WLAN_AUTH_OPEN:
2317 case WLAN_AUTH_LEAP:
2321 case WLAN_AUTH_SHARED_KEY:
2322 if (ifmgd->auth_data->expected_transaction != 4) {
2323 ieee80211_auth_challenge(sdata, mgmt, len);
2324 /* need another frame */
2329 WARN_ONCE(1, "invalid auth alg %d",
2330 ifmgd->auth_data->algorithm);
2334 sdata_info(sdata, "authenticated\n");
2335 ifmgd->auth_data->done = true;
2336 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2337 ifmgd->auth_data->timeout_started = true;
2338 run_again(sdata, ifmgd->auth_data->timeout);
2340 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2341 ifmgd->auth_data->expected_transaction != 2) {
2343 * Report auth frame to user space for processing since another
2344 * round of Authentication frames is still needed.
2346 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2350 /* move station state to auth */
2351 mutex_lock(&sdata->local->sta_mtx);
2352 sta = sta_info_get(sdata, bssid);
2354 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2357 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2358 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2361 mutex_unlock(&sdata->local->sta_mtx);
2363 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2366 mutex_unlock(&sdata->local->sta_mtx);
2367 /* ignore frame -- wait for timeout */
2371 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2372 struct ieee80211_mgmt *mgmt, size_t len)
2374 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2375 const u8 *bssid = NULL;
2378 sdata_assert_lock(sdata);
2383 if (!ifmgd->associated ||
2384 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2387 bssid = ifmgd->associated->bssid;
2389 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2391 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2392 bssid, reason_code);
2394 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2396 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2400 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2401 struct ieee80211_mgmt *mgmt, size_t len)
2403 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2406 sdata_assert_lock(sdata);
2411 if (!ifmgd->associated ||
2412 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2415 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2417 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2418 mgmt->sa, reason_code);
2420 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2422 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2425 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2426 u8 *supp_rates, unsigned int supp_rates_len,
2427 u32 *rates, u32 *basic_rates,
2428 bool *have_higher_than_11mbit,
2429 int *min_rate, int *min_rate_index)
2433 for (i = 0; i < supp_rates_len; i++) {
2434 int rate = (supp_rates[i] & 0x7f) * 5;
2435 bool is_basic = !!(supp_rates[i] & 0x80);
2438 *have_higher_than_11mbit = true;
2441 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2442 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2444 * Note: Even through the membership selector and the basic
2445 * rate flag share the same bit, they are not exactly
2448 if (!!(supp_rates[i] & 0x80) &&
2449 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2452 for (j = 0; j < sband->n_bitrates; j++) {
2453 if (sband->bitrates[j].bitrate == rate) {
2456 *basic_rates |= BIT(j);
2457 if (rate < *min_rate) {
2459 *min_rate_index = j;
2467 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2470 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2472 sdata_assert_lock(sdata);
2475 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2477 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2478 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2479 sdata->u.mgd.flags = 0;
2480 ieee80211_vif_release_channel(sdata);
2484 sdata->u.mgd.assoc_data = NULL;
2487 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2488 struct cfg80211_bss *cbss,
2489 struct ieee80211_mgmt *mgmt, size_t len)
2491 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2492 struct ieee80211_local *local = sdata->local;
2493 struct ieee80211_supported_band *sband;
2494 struct sta_info *sta;
2496 u16 capab_info, aid;
2497 struct ieee802_11_elems elems;
2498 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2502 /* AssocResp and ReassocResp have identical structure */
2504 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2505 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2507 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2508 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2510 aid &= ~(BIT(15) | BIT(14));
2512 ifmgd->broken_ap = false;
2514 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2515 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2518 ifmgd->broken_ap = true;
2521 pos = mgmt->u.assoc_resp.variable;
2522 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2524 if (!elems.supp_rates) {
2525 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2532 * We previously checked these in the beacon/probe response, so
2533 * they should be present here. This is just a safety net.
2535 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2536 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2538 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2542 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2543 (!elems.vht_cap_elem || !elems.vht_operation)) {
2545 "VHT AP is missing VHT capability/operation in AssocResp\n");
2549 mutex_lock(&sdata->local->sta_mtx);
2551 * station info was already allocated and inserted before
2552 * the association and should be available to us
2554 sta = sta_info_get(sdata, cbss->bssid);
2555 if (WARN_ON(!sta)) {
2556 mutex_unlock(&sdata->local->sta_mtx);
2560 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2562 /* Set up internal HT/VHT capabilities */
2563 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2564 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2565 elems.ht_cap_elem, sta);
2567 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2568 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2569 elems.vht_cap_elem, sta);
2572 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2573 * in their association response, so ignore that data for our own
2574 * configuration. If it changed since the last beacon, we'll get the
2575 * next beacon and update then.
2579 * If an operating mode notification IE is present, override the
2580 * NSS calculation (that would be done in rate_control_rate_init())
2581 * and use the # of streams from that element.
2583 if (elems.opmode_notif &&
2584 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2587 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2588 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2590 sta->sta.rx_nss = nss;
2593 rate_control_rate_init(sta);
2595 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2596 set_sta_flag(sta, WLAN_STA_MFP);
2598 if (elems.wmm_param)
2599 set_sta_flag(sta, WLAN_STA_WME);
2601 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2602 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2603 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2606 "failed to move station %pM to desired state\n",
2608 WARN_ON(__sta_info_destroy(sta));
2609 mutex_unlock(&sdata->local->sta_mtx);
2613 mutex_unlock(&sdata->local->sta_mtx);
2616 * Always handle WMM once after association regardless
2617 * of the first value the AP uses. Setting -1 here has
2618 * that effect because the AP values is an unsigned
2621 ifmgd->wmm_last_param_set = -1;
2623 if (elems.wmm_param)
2624 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2625 elems.wmm_param_len);
2627 ieee80211_set_wmm_default(sdata, false);
2628 changed |= BSS_CHANGED_QOS;
2630 /* set AID and assoc capability,
2631 * ieee80211_set_associated() will tell the driver */
2632 bss_conf->aid = aid;
2633 bss_conf->assoc_capability = capab_info;
2634 ieee80211_set_associated(sdata, cbss, changed);
2637 * If we're using 4-addr mode, let the AP know that we're
2638 * doing so, so that it can create the STA VLAN on its side
2640 if (ifmgd->use_4addr)
2641 ieee80211_send_4addr_nullfunc(local, sdata);
2644 * Start timer to probe the connection to the AP now.
2645 * Also start the timer that will detect beacon loss.
2647 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2648 ieee80211_sta_reset_beacon_monitor(sdata);
2653 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2654 struct ieee80211_mgmt *mgmt,
2657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2658 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2659 u16 capab_info, status_code, aid;
2660 struct ieee802_11_elems elems;
2663 struct cfg80211_bss *bss;
2665 sdata_assert_lock(sdata);
2669 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2673 * AssocResp and ReassocResp have identical structure, so process both
2674 * of them in this function.
2680 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2681 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2682 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2683 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2686 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2687 reassoc ? "Rea" : "A", mgmt->sa,
2688 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2690 pos = mgmt->u.assoc_resp.variable;
2691 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2693 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2694 elems.timeout_int &&
2695 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2697 tu = le32_to_cpu(elems.timeout_int->value);
2698 ms = tu * 1024 / 1000;
2700 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2702 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2703 assoc_data->timeout_started = true;
2704 if (ms > IEEE80211_ASSOC_TIMEOUT)
2705 run_again(sdata, assoc_data->timeout);
2709 bss = assoc_data->bss;
2711 if (status_code != WLAN_STATUS_SUCCESS) {
2712 sdata_info(sdata, "%pM denied association (code=%d)\n",
2713 mgmt->sa, status_code);
2714 ieee80211_destroy_assoc_data(sdata, false);
2716 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2717 /* oops -- internal error -- send timeout for now */
2718 ieee80211_destroy_assoc_data(sdata, false);
2719 cfg80211_put_bss(sdata->local->hw.wiphy, bss);
2720 cfg80211_assoc_timeout(sdata->dev, mgmt->bssid);
2723 sdata_info(sdata, "associated\n");
2726 * destroy assoc_data afterwards, as otherwise an idle
2727 * recalc after assoc_data is NULL but before associated
2728 * is set can cause the interface to go idle
2730 ieee80211_destroy_assoc_data(sdata, true);
2733 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2736 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2737 struct ieee80211_mgmt *mgmt, size_t len,
2738 struct ieee80211_rx_status *rx_status,
2739 struct ieee802_11_elems *elems)
2741 struct ieee80211_local *local = sdata->local;
2743 struct ieee80211_bss *bss;
2744 struct ieee80211_channel *channel;
2746 sdata_assert_lock(sdata);
2748 if (elems->ds_params)
2749 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2752 freq = rx_status->freq;
2754 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2756 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2759 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2762 ieee80211_rx_bss_put(local, bss);
2763 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2766 if (!sdata->u.mgd.associated ||
2767 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
2770 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2776 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2777 struct sk_buff *skb)
2779 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2780 struct ieee80211_if_managed *ifmgd;
2781 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2782 size_t baselen, len = skb->len;
2783 struct ieee802_11_elems elems;
2785 ifmgd = &sdata->u.mgd;
2787 sdata_assert_lock(sdata);
2789 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2790 return; /* ignore ProbeResp to foreign address */
2792 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2796 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2799 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2801 if (ifmgd->associated &&
2802 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2803 ieee80211_reset_ap_probe(sdata);
2805 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2806 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2807 /* got probe response, continue with auth */
2808 sdata_info(sdata, "direct probe responded\n");
2809 ifmgd->auth_data->tries = 0;
2810 ifmgd->auth_data->timeout = jiffies;
2811 ifmgd->auth_data->timeout_started = true;
2812 run_again(sdata, ifmgd->auth_data->timeout);
2817 * This is the canonical list of information elements we care about,
2818 * the filter code also gives us all changes to the Microsoft OUI
2819 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2821 * We implement beacon filtering in software since that means we can
2822 * avoid processing the frame here and in cfg80211, and userspace
2823 * will not be able to tell whether the hardware supports it or not.
2825 * XXX: This list needs to be dynamic -- userspace needs to be able to
2826 * add items it requires. It also needs to be able to tell us to
2827 * look out for other vendor IEs.
2829 static const u64 care_about_ies =
2830 (1ULL << WLAN_EID_COUNTRY) |
2831 (1ULL << WLAN_EID_ERP_INFO) |
2832 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2833 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2834 (1ULL << WLAN_EID_HT_CAPABILITY) |
2835 (1ULL << WLAN_EID_HT_OPERATION);
2837 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2838 struct ieee80211_mgmt *mgmt, size_t len,
2839 struct ieee80211_rx_status *rx_status)
2841 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2842 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2844 struct ieee802_11_elems elems;
2845 struct ieee80211_local *local = sdata->local;
2846 struct ieee80211_chanctx_conf *chanctx_conf;
2847 struct ieee80211_channel *chan;
2848 struct sta_info *sta;
2854 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2856 sdata_assert_lock(sdata);
2858 /* Process beacon from the current BSS */
2859 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2864 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2865 if (!chanctx_conf) {
2870 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2874 chan = chanctx_conf->def.chan;
2877 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2878 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2879 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2880 len - baselen, false, &elems);
2882 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2883 if (elems.tim && !elems.parse_error) {
2884 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2885 ifmgd->dtim_period = tim_ie->dtim_period;
2887 ifmgd->have_beacon = true;
2888 ifmgd->assoc_data->need_beacon = false;
2889 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2890 sdata->vif.bss_conf.sync_tsf =
2891 le64_to_cpu(mgmt->u.beacon.timestamp);
2892 sdata->vif.bss_conf.sync_device_ts =
2893 rx_status->device_timestamp;
2895 sdata->vif.bss_conf.sync_dtim_count =
2896 elems.tim->dtim_count;
2898 sdata->vif.bss_conf.sync_dtim_count = 0;
2900 /* continue assoc process */
2901 ifmgd->assoc_data->timeout = jiffies;
2902 ifmgd->assoc_data->timeout_started = true;
2903 run_again(sdata, ifmgd->assoc_data->timeout);
2907 if (!ifmgd->associated ||
2908 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2910 bssid = ifmgd->associated->bssid;
2912 /* Track average RSSI from the Beacon frames of the current AP */
2913 ifmgd->last_beacon_signal = rx_status->signal;
2914 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2915 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2916 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2917 ifmgd->last_cqm_event_signal = 0;
2918 ifmgd->count_beacon_signal = 1;
2919 ifmgd->last_ave_beacon_signal = 0;
2921 ifmgd->ave_beacon_signal =
2922 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2923 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2924 ifmgd->ave_beacon_signal) / 16;
2925 ifmgd->count_beacon_signal++;
2928 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2929 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2930 int sig = ifmgd->ave_beacon_signal;
2931 int last_sig = ifmgd->last_ave_beacon_signal;
2934 * if signal crosses either of the boundaries, invoke callback
2935 * with appropriate parameters
2937 if (sig > ifmgd->rssi_max_thold &&
2938 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2939 ifmgd->last_ave_beacon_signal = sig;
2940 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
2941 } else if (sig < ifmgd->rssi_min_thold &&
2942 (last_sig >= ifmgd->rssi_max_thold ||
2944 ifmgd->last_ave_beacon_signal = sig;
2945 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
2949 if (bss_conf->cqm_rssi_thold &&
2950 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2951 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2952 int sig = ifmgd->ave_beacon_signal / 16;
2953 int last_event = ifmgd->last_cqm_event_signal;
2954 int thold = bss_conf->cqm_rssi_thold;
2955 int hyst = bss_conf->cqm_rssi_hyst;
2957 (last_event == 0 || sig < last_event - hyst)) {
2958 ifmgd->last_cqm_event_signal = sig;
2959 ieee80211_cqm_rssi_notify(
2961 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2963 } else if (sig > thold &&
2964 (last_event == 0 || sig > last_event + hyst)) {
2965 ifmgd->last_cqm_event_signal = sig;
2966 ieee80211_cqm_rssi_notify(
2968 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2973 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2974 mlme_dbg_ratelimited(sdata,
2975 "cancelling AP probe due to a received beacon\n");
2976 mutex_lock(&local->mtx);
2977 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2978 ieee80211_run_deferred_scan(local);
2979 mutex_unlock(&local->mtx);
2981 mutex_lock(&local->iflist_mtx);
2982 ieee80211_recalc_ps(local, -1);
2983 mutex_unlock(&local->iflist_mtx);
2987 * Push the beacon loss detection into the future since
2988 * we are processing a beacon from the AP just now.
2990 ieee80211_sta_reset_beacon_monitor(sdata);
2992 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2993 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2994 len - baselen, false, &elems,
2995 care_about_ies, ncrc);
2997 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2998 bool directed_tim = ieee80211_check_tim(elems.tim,
3002 if (local->hw.conf.dynamic_ps_timeout > 0) {
3003 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3004 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3005 ieee80211_hw_config(local,
3006 IEEE80211_CONF_CHANGE_PS);
3008 ieee80211_send_nullfunc(local, sdata, 0);
3009 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3010 local->pspolling = true;
3013 * Here is assumed that the driver will be
3014 * able to send ps-poll frame and receive a
3015 * response even though power save mode is
3016 * enabled, but some drivers might require
3017 * to disable power save here. This needs
3018 * to be investigated.
3020 ieee80211_send_pspoll(local, sdata);
3025 if (sdata->vif.p2p) {
3026 struct ieee80211_p2p_noa_attr noa = {};
3029 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3031 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3032 (u8 *) &noa, sizeof(noa));
3034 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3035 /* valid noa_attr and index changed */
3036 sdata->u.mgd.p2p_noa_index = noa.index;
3037 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3038 changed |= BSS_CHANGED_P2P_PS;
3040 * make sure we update all information, the CRC
3041 * mechanism doesn't look at P2P attributes.
3043 ifmgd->beacon_crc_valid = false;
3045 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3046 /* noa_attr not found and we had valid noa_attr before */
3047 sdata->u.mgd.p2p_noa_index = -1;
3048 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3049 changed |= BSS_CHANGED_P2P_PS;
3050 ifmgd->beacon_crc_valid = false;
3054 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3056 ifmgd->beacon_crc = ncrc;
3057 ifmgd->beacon_crc_valid = true;
3059 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3061 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3062 elems.wmm_param_len))
3063 changed |= BSS_CHANGED_QOS;
3066 * If we haven't had a beacon before, tell the driver about the
3067 * DTIM period (and beacon timing if desired) now.
3069 if (!ifmgd->have_beacon) {
3070 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3072 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3074 bss_conf->dtim_period = 1;
3076 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3077 sdata->vif.bss_conf.sync_tsf =
3078 le64_to_cpu(mgmt->u.beacon.timestamp);
3079 sdata->vif.bss_conf.sync_device_ts =
3080 rx_status->device_timestamp;
3082 sdata->vif.bss_conf.sync_dtim_count =
3083 elems.tim->dtim_count;
3085 sdata->vif.bss_conf.sync_dtim_count = 0;
3088 changed |= BSS_CHANGED_BEACON_INFO;
3089 ifmgd->have_beacon = true;
3091 mutex_lock(&local->iflist_mtx);
3092 ieee80211_recalc_ps(local, -1);
3093 mutex_unlock(&local->iflist_mtx);
3095 ieee80211_recalc_ps_vif(sdata);
3098 if (elems.erp_info) {
3100 erp_value = elems.erp_info[0];
3104 changed |= ieee80211_handle_bss_capability(sdata,
3105 le16_to_cpu(mgmt->u.beacon.capab_info),
3106 erp_valid, erp_value);
3108 mutex_lock(&local->sta_mtx);
3109 sta = sta_info_get(sdata, bssid);
3111 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3112 elems.vht_operation, bssid, &changed)) {
3113 mutex_unlock(&local->sta_mtx);
3114 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3115 WLAN_REASON_DEAUTH_LEAVING,
3117 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3118 sizeof(deauth_buf));
3122 if (sta && elems.opmode_notif)
3123 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3124 rx_status->band, true);
3125 mutex_unlock(&local->sta_mtx);
3127 if (elems.country_elem && elems.pwr_constr_elem &&
3128 mgmt->u.probe_resp.capab_info &
3129 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3130 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3132 elems.country_elem_len,
3133 elems.pwr_constr_elem);
3135 ieee80211_bss_info_change_notify(sdata, changed);
3138 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3139 struct sk_buff *skb)
3141 struct ieee80211_rx_status *rx_status;
3142 struct ieee80211_mgmt *mgmt;
3144 struct ieee802_11_elems elems;
3147 rx_status = (struct ieee80211_rx_status *) skb->cb;
3148 mgmt = (struct ieee80211_mgmt *) skb->data;
3149 fc = le16_to_cpu(mgmt->frame_control);
3153 switch (fc & IEEE80211_FCTL_STYPE) {
3154 case IEEE80211_STYPE_BEACON:
3155 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3157 case IEEE80211_STYPE_PROBE_RESP:
3158 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3160 case IEEE80211_STYPE_AUTH:
3161 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3163 case IEEE80211_STYPE_DEAUTH:
3164 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3166 case IEEE80211_STYPE_DISASSOC:
3167 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3169 case IEEE80211_STYPE_ASSOC_RESP:
3170 case IEEE80211_STYPE_REASSOC_RESP:
3171 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3173 case IEEE80211_STYPE_ACTION:
3174 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3175 ies_len = skb->len -
3176 offsetof(struct ieee80211_mgmt,
3177 u.action.u.chan_switch.variable);
3182 ieee802_11_parse_elems(
3183 mgmt->u.action.u.chan_switch.variable,
3184 ies_len, true, &elems);
3186 if (elems.parse_error)
3189 ieee80211_sta_process_chanswitch(sdata,
3192 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3193 ies_len = skb->len -
3194 offsetof(struct ieee80211_mgmt,
3195 u.action.u.ext_chan_switch.variable);
3200 ieee802_11_parse_elems(
3201 mgmt->u.action.u.ext_chan_switch.variable,
3202 ies_len, true, &elems);
3204 if (elems.parse_error)
3207 /* for the handling code pretend this was also an IE */
3208 elems.ext_chansw_ie =
3209 &mgmt->u.action.u.ext_chan_switch.data;
3211 ieee80211_sta_process_chanswitch(sdata,
3217 sdata_unlock(sdata);
3220 static void ieee80211_sta_timer(unsigned long data)
3222 struct ieee80211_sub_if_data *sdata =
3223 (struct ieee80211_sub_if_data *) data;
3225 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3228 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3229 u8 *bssid, u8 reason, bool tx)
3231 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3233 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3236 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3237 IEEE80211_DEAUTH_FRAME_LEN);
3240 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3242 struct ieee80211_local *local = sdata->local;
3243 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3244 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3247 sdata_assert_lock(sdata);
3249 if (WARN_ON_ONCE(!auth_data))
3254 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3255 sdata_info(sdata, "authentication with %pM timed out\n",
3256 auth_data->bss->bssid);
3259 * Most likely AP is not in the range so remove the
3260 * bss struct for that AP.
3262 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3267 drv_mgd_prepare_tx(local, sdata);
3269 if (auth_data->bss->proberesp_ies) {
3273 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3274 auth_data->bss->bssid, auth_data->tries,
3275 IEEE80211_AUTH_MAX_TRIES);
3277 auth_data->expected_transaction = 2;
3279 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3280 trans = auth_data->sae_trans;
3281 status = auth_data->sae_status;
3282 auth_data->expected_transaction = trans;
3285 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3286 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3287 IEEE80211_TX_INTFL_MLME_CONN_TX;
3289 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3290 auth_data->data, auth_data->data_len,
3291 auth_data->bss->bssid,
3292 auth_data->bss->bssid, NULL, 0, 0,
3297 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3298 auth_data->bss->bssid, auth_data->tries,
3299 IEEE80211_AUTH_MAX_TRIES);
3302 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3308 * Direct probe is sent to broadcast address as some APs
3309 * will not answer to direct packet in unassociated state.
3311 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3312 NULL, 0, (u32) -1, true, 0,
3313 auth_data->bss->channel, false);
3317 if (tx_flags == 0) {
3318 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3319 ifmgd->auth_data->timeout_started = true;
3320 run_again(sdata, auth_data->timeout);
3322 auth_data->timeout_started = false;
3328 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3330 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3331 struct ieee80211_local *local = sdata->local;
3333 sdata_assert_lock(sdata);
3335 assoc_data->tries++;
3336 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3337 sdata_info(sdata, "association with %pM timed out\n",
3338 assoc_data->bss->bssid);
3341 * Most likely AP is not in the range so remove the
3342 * bss struct for that AP.
3344 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3349 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3350 assoc_data->bss->bssid, assoc_data->tries,
3351 IEEE80211_ASSOC_MAX_TRIES);
3352 ieee80211_send_assoc(sdata);
3354 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3355 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3356 assoc_data->timeout_started = true;
3357 run_again(sdata, assoc_data->timeout);
3359 assoc_data->timeout_started = false;
3365 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3366 __le16 fc, bool acked)
3368 struct ieee80211_local *local = sdata->local;
3370 sdata->u.mgd.status_fc = fc;
3371 sdata->u.mgd.status_acked = acked;
3372 sdata->u.mgd.status_received = true;
3374 ieee80211_queue_work(&local->hw, &sdata->work);
3377 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3379 struct ieee80211_local *local = sdata->local;
3380 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3384 if (ifmgd->status_received) {
3385 __le16 fc = ifmgd->status_fc;
3386 bool status_acked = ifmgd->status_acked;
3388 ifmgd->status_received = false;
3389 if (ifmgd->auth_data &&
3390 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3392 ifmgd->auth_data->timeout =
3393 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3394 run_again(sdata, ifmgd->auth_data->timeout);
3396 ifmgd->auth_data->timeout = jiffies - 1;
3398 ifmgd->auth_data->timeout_started = true;
3399 } else if (ifmgd->assoc_data &&
3400 (ieee80211_is_assoc_req(fc) ||
3401 ieee80211_is_reassoc_req(fc))) {
3403 ifmgd->assoc_data->timeout =
3404 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3405 run_again(sdata, ifmgd->assoc_data->timeout);
3407 ifmgd->assoc_data->timeout = jiffies - 1;
3409 ifmgd->assoc_data->timeout_started = true;
3413 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3414 time_after(jiffies, ifmgd->auth_data->timeout)) {
3415 if (ifmgd->auth_data->done) {
3417 * ok ... we waited for assoc but userspace didn't,
3418 * so let's just kill the auth data
3420 ieee80211_destroy_auth_data(sdata, false);
3421 } else if (ieee80211_probe_auth(sdata)) {
3424 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3426 ieee80211_destroy_auth_data(sdata, false);
3428 cfg80211_auth_timeout(sdata->dev, bssid);
3430 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3431 run_again(sdata, ifmgd->auth_data->timeout);
3433 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3434 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3435 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3436 ieee80211_do_assoc(sdata)) {
3439 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3441 ieee80211_destroy_assoc_data(sdata, false);
3443 cfg80211_assoc_timeout(sdata->dev, bssid);
3445 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3446 run_again(sdata, ifmgd->assoc_data->timeout);
3448 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3449 IEEE80211_STA_CONNECTION_POLL) &&
3450 ifmgd->associated) {
3454 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3456 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3457 max_tries = max_nullfunc_tries;
3459 max_tries = max_probe_tries;
3461 /* ACK received for nullfunc probing frame */
3462 if (!ifmgd->probe_send_count)
3463 ieee80211_reset_ap_probe(sdata);
3464 else if (ifmgd->nullfunc_failed) {
3465 if (ifmgd->probe_send_count < max_tries) {
3467 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3468 bssid, ifmgd->probe_send_count,
3470 ieee80211_mgd_probe_ap_send(sdata);
3473 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3475 ieee80211_sta_connection_lost(sdata, bssid,
3476 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3479 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3480 run_again(sdata, ifmgd->probe_timeout);
3481 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3483 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3484 bssid, probe_wait_ms);
3485 ieee80211_sta_connection_lost(sdata, bssid,
3486 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3487 } else if (ifmgd->probe_send_count < max_tries) {
3489 "No probe response from AP %pM after %dms, try %d/%i\n",
3490 bssid, probe_wait_ms,
3491 ifmgd->probe_send_count, max_tries);
3492 ieee80211_mgd_probe_ap_send(sdata);
3495 * We actually lost the connection ... or did we?
3498 wiphy_debug(local->hw.wiphy,
3499 "%s: No probe response from AP %pM"
3500 " after %dms, disconnecting.\n",
3502 bssid, probe_wait_ms);
3504 ieee80211_sta_connection_lost(sdata, bssid,
3505 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3509 sdata_unlock(sdata);
3512 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3514 struct ieee80211_sub_if_data *sdata =
3515 (struct ieee80211_sub_if_data *) data;
3516 struct ieee80211_local *local = sdata->local;
3518 if (local->quiescing)
3521 sdata->u.mgd.connection_loss = false;
3522 ieee80211_queue_work(&sdata->local->hw,
3523 &sdata->u.mgd.beacon_connection_loss_work);
3526 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3528 struct ieee80211_sub_if_data *sdata =
3529 (struct ieee80211_sub_if_data *) data;
3530 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3531 struct ieee80211_local *local = sdata->local;
3533 if (local->quiescing)
3536 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3539 static void ieee80211_sta_monitor_work(struct work_struct *work)
3541 struct ieee80211_sub_if_data *sdata =
3542 container_of(work, struct ieee80211_sub_if_data,
3543 u.mgd.monitor_work);
3545 ieee80211_mgd_probe_ap(sdata, false);
3548 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3552 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3553 __ieee80211_stop_poll(sdata);
3555 /* let's probe the connection once */
3556 flags = sdata->local->hw.flags;
3557 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3558 ieee80211_queue_work(&sdata->local->hw,
3559 &sdata->u.mgd.monitor_work);
3560 /* and do all the other regular work too */
3561 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3566 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3568 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3571 if (!ifmgd->associated) {
3572 sdata_unlock(sdata);
3576 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3577 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3578 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3579 ieee80211_sta_connection_lost(sdata,
3580 ifmgd->associated->bssid,
3581 WLAN_REASON_UNSPECIFIED,
3583 sdata_unlock(sdata);
3586 sdata_unlock(sdata);
3590 /* interface setup */
3591 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3593 struct ieee80211_if_managed *ifmgd;
3595 ifmgd = &sdata->u.mgd;
3596 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3597 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3598 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3599 ieee80211_beacon_connection_loss_work);
3600 INIT_WORK(&ifmgd->csa_connection_drop_work,
3601 ieee80211_csa_connection_drop_work);
3602 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3603 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3604 (unsigned long) sdata);
3605 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3606 (unsigned long) sdata);
3607 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3608 (unsigned long) sdata);
3609 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3610 (unsigned long) sdata);
3613 ifmgd->powersave = sdata->wdev.ps;
3614 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3615 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3616 ifmgd->p2p_noa_index = -1;
3618 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3619 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3621 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3624 /* scan finished notification */
3625 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3627 struct ieee80211_sub_if_data *sdata;
3629 /* Restart STA timers */
3631 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3632 if (ieee80211_sdata_running(sdata))
3633 ieee80211_restart_sta_timer(sdata);
3638 int ieee80211_max_network_latency(struct notifier_block *nb,
3639 unsigned long data, void *dummy)
3641 s32 latency_usec = (s32) data;
3642 struct ieee80211_local *local =
3643 container_of(nb, struct ieee80211_local,
3644 network_latency_notifier);
3646 mutex_lock(&local->iflist_mtx);
3647 ieee80211_recalc_ps(local, latency_usec);
3648 mutex_unlock(&local->iflist_mtx);
3653 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3654 struct cfg80211_bss *cbss)
3656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3657 const u8 *ht_cap_ie, *vht_cap_ie;
3658 const struct ieee80211_ht_cap *ht_cap;
3659 const struct ieee80211_vht_cap *vht_cap;
3662 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3665 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3666 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3667 ht_cap = (void *)(ht_cap_ie + 2);
3668 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3670 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3671 * "Tx Unequal Modulation Supported" fields.
3675 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3678 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3679 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3683 vht_cap = (void *)(vht_cap_ie + 2);
3684 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3685 for (nss = 8; nss > 0; nss--) {
3686 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3687 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3690 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3691 chains = max(chains, nss);
3697 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3698 struct cfg80211_bss *cbss)
3700 struct ieee80211_local *local = sdata->local;
3701 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3702 const struct ieee80211_ht_operation *ht_oper = NULL;
3703 const struct ieee80211_vht_operation *vht_oper = NULL;
3704 struct ieee80211_supported_band *sband;
3705 struct cfg80211_chan_def chandef;
3708 sband = local->hw.wiphy->bands[cbss->channel->band];
3710 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3711 IEEE80211_STA_DISABLE_80P80MHZ |
3712 IEEE80211_STA_DISABLE_160MHZ);
3716 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3717 sband->ht_cap.ht_supported) {
3718 const u8 *ht_oper_ie, *ht_cap;
3720 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3721 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3722 ht_oper = (void *)(ht_oper_ie + 2);
3724 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3725 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3726 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3731 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3732 sband->vht_cap.vht_supported) {
3733 const u8 *vht_oper_ie, *vht_cap;
3735 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3736 WLAN_EID_VHT_OPERATION);
3737 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3738 vht_oper = (void *)(vht_oper_ie + 2);
3739 if (vht_oper && !ht_oper) {
3742 "AP advertised VHT without HT, disabling both\n");
3743 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3744 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3747 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3748 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3749 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3754 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3759 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3764 /* will change later if needed */
3765 sdata->smps_mode = IEEE80211_SMPS_OFF;
3768 * If this fails (possibly due to channel context sharing
3769 * on incompatible channels, e.g. 80+80 and 160 sharing the
3770 * same control channel) try to use a smaller bandwidth.
3772 ret = ieee80211_vif_use_channel(sdata, &chandef,
3773 IEEE80211_CHANCTX_SHARED);
3774 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3775 ifmgd->flags |= chandef_downgrade(&chandef);
3776 ret = ieee80211_vif_use_channel(sdata, &chandef,
3777 IEEE80211_CHANCTX_SHARED);
3782 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3783 struct cfg80211_bss *cbss, bool assoc)
3785 struct ieee80211_local *local = sdata->local;
3786 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3787 struct ieee80211_bss *bss = (void *)cbss->priv;
3788 struct sta_info *new_sta = NULL;
3789 bool have_sta = false;
3792 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3797 have_sta = sta_info_get(sdata, cbss->bssid);
3802 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3808 u32 rates = 0, basic_rates = 0;
3809 bool have_higher_than_11mbit;
3810 int min_rate = INT_MAX, min_rate_index = -1;
3811 struct ieee80211_supported_band *sband;
3812 const struct cfg80211_bss_ies *ies;
3814 sband = local->hw.wiphy->bands[cbss->channel->band];
3816 err = ieee80211_prep_channel(sdata, cbss);
3818 sta_info_free(local, new_sta);
3822 ieee80211_get_rates(sband, bss->supp_rates,
3823 bss->supp_rates_len,
3824 &rates, &basic_rates,
3825 &have_higher_than_11mbit,
3826 &min_rate, &min_rate_index);
3829 * This used to be a workaround for basic rates missing
3830 * in the association response frame. Now that we no
3831 * longer use the basic rates from there, it probably
3832 * doesn't happen any more, but keep the workaround so
3833 * in case some *other* APs are buggy in different ways
3834 * we can connect -- with a warning.
3836 if (!basic_rates && min_rate_index >= 0) {
3838 "No basic rates, using min rate instead\n");
3839 basic_rates = BIT(min_rate_index);
3842 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3843 sdata->vif.bss_conf.basic_rates = basic_rates;
3845 /* cf. IEEE 802.11 9.2.12 */
3846 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3847 have_higher_than_11mbit)
3848 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3850 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3852 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3854 /* set timing information */
3855 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3857 ies = rcu_dereference(cbss->beacon_ies);
3861 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3862 sdata->vif.bss_conf.sync_device_ts =
3863 bss->device_ts_beacon;
3864 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3865 ies->data, ies->len);
3866 if (tim_ie && tim_ie[1] >= 2)
3867 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3869 sdata->vif.bss_conf.sync_dtim_count = 0;
3870 } else if (!(local->hw.flags &
3871 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3872 ies = rcu_dereference(cbss->proberesp_ies);
3873 /* must be non-NULL since beacon IEs were NULL */
3874 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3875 sdata->vif.bss_conf.sync_device_ts =
3876 bss->device_ts_presp;
3877 sdata->vif.bss_conf.sync_dtim_count = 0;
3879 sdata->vif.bss_conf.sync_tsf = 0;
3880 sdata->vif.bss_conf.sync_device_ts = 0;
3881 sdata->vif.bss_conf.sync_dtim_count = 0;
3885 /* tell driver about BSSID, basic rates and timing */
3886 ieee80211_bss_info_change_notify(sdata,
3887 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3888 BSS_CHANGED_BEACON_INT);
3891 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3893 err = sta_info_insert(new_sta);
3897 "failed to insert STA entry for the AP (error %d)\n",
3902 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3908 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3909 struct cfg80211_auth_request *req)
3911 struct ieee80211_local *local = sdata->local;
3912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3913 struct ieee80211_mgd_auth_data *auth_data;
3917 /* prepare auth data structure */
3919 switch (req->auth_type) {
3920 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3921 auth_alg = WLAN_AUTH_OPEN;
3923 case NL80211_AUTHTYPE_SHARED_KEY:
3924 if (IS_ERR(local->wep_tx_tfm))
3926 auth_alg = WLAN_AUTH_SHARED_KEY;
3928 case NL80211_AUTHTYPE_FT:
3929 auth_alg = WLAN_AUTH_FT;
3931 case NL80211_AUTHTYPE_NETWORK_EAP:
3932 auth_alg = WLAN_AUTH_LEAP;
3934 case NL80211_AUTHTYPE_SAE:
3935 auth_alg = WLAN_AUTH_SAE;
3941 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3942 req->ie_len, GFP_KERNEL);
3946 auth_data->bss = req->bss;
3948 if (req->sae_data_len >= 4) {
3949 __le16 *pos = (__le16 *) req->sae_data;
3950 auth_data->sae_trans = le16_to_cpu(pos[0]);
3951 auth_data->sae_status = le16_to_cpu(pos[1]);
3952 memcpy(auth_data->data, req->sae_data + 4,
3953 req->sae_data_len - 4);
3954 auth_data->data_len += req->sae_data_len - 4;
3957 if (req->ie && req->ie_len) {
3958 memcpy(&auth_data->data[auth_data->data_len],
3959 req->ie, req->ie_len);
3960 auth_data->data_len += req->ie_len;
3963 if (req->key && req->key_len) {
3964 auth_data->key_len = req->key_len;
3965 auth_data->key_idx = req->key_idx;
3966 memcpy(auth_data->key, req->key, req->key_len);
3969 auth_data->algorithm = auth_alg;
3971 /* try to authenticate/probe */
3973 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3974 ifmgd->assoc_data) {
3979 if (ifmgd->auth_data)
3980 ieee80211_destroy_auth_data(sdata, false);
3982 /* prep auth_data so we don't go into idle on disassoc */
3983 ifmgd->auth_data = auth_data;
3985 if (ifmgd->associated) {
3986 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3988 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3989 WLAN_REASON_UNSPECIFIED,
3992 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3996 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
3998 err = ieee80211_prep_connection(sdata, req->bss, false);
4002 err = ieee80211_probe_auth(sdata);
4004 sta_info_destroy_addr(sdata, req->bss->bssid);
4008 /* hold our own reference */
4009 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4013 memset(ifmgd->bssid, 0, ETH_ALEN);
4014 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4015 ifmgd->auth_data = NULL;
4021 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4022 struct cfg80211_assoc_request *req)
4024 struct ieee80211_local *local = sdata->local;
4025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4026 struct ieee80211_bss *bss = (void *)req->bss->priv;
4027 struct ieee80211_mgd_assoc_data *assoc_data;
4028 const struct cfg80211_bss_ies *beacon_ies;
4029 struct ieee80211_supported_band *sband;
4030 const u8 *ssidie, *ht_ie, *vht_ie;
4033 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4038 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4044 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4045 assoc_data->ssid_len = ssidie[1];
4048 if (ifmgd->associated) {
4049 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4051 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4052 WLAN_REASON_UNSPECIFIED,
4055 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4059 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4064 if (ifmgd->assoc_data) {
4069 if (ifmgd->auth_data) {
4072 /* keep sta info, bssid if matching */
4073 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4074 ieee80211_destroy_auth_data(sdata, match);
4077 /* prepare assoc data */
4079 ifmgd->beacon_crc_valid = false;
4082 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4083 * We still associate in non-HT mode (11a/b/g) if any one of these
4084 * ciphers is configured as pairwise.
4085 * We can set this to true for non-11n hardware, that'll be checked
4086 * separately along with the peer capabilities.
4088 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4089 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4090 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4091 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4092 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4093 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4094 netdev_info(sdata->dev,
4095 "disabling HT/VHT due to WEP/TKIP use\n");
4099 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4100 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4101 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4104 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4105 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4107 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4108 sband = local->hw.wiphy->bands[req->bss->channel->band];
4109 if (!sband->ht_cap.ht_supported ||
4110 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4111 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4113 netdev_info(sdata->dev,
4114 "disabling HT as WMM/QoS is not supported by the AP\n");
4117 /* disable VHT if we don't support it or the AP doesn't use WMM */
4118 if (!sband->vht_cap.vht_supported ||
4119 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4120 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4122 netdev_info(sdata->dev,
4123 "disabling VHT as WMM/QoS is not supported by the AP\n");
4126 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4127 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4128 sizeof(ifmgd->ht_capa_mask));
4130 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4131 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4132 sizeof(ifmgd->vht_capa_mask));
4134 if (req->ie && req->ie_len) {
4135 memcpy(assoc_data->ie, req->ie, req->ie_len);
4136 assoc_data->ie_len = req->ie_len;
4139 assoc_data->bss = req->bss;
4141 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4142 if (ifmgd->powersave)
4143 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4145 sdata->smps_mode = IEEE80211_SMPS_OFF;
4147 sdata->smps_mode = ifmgd->req_smps;
4149 assoc_data->capability = req->bss->capability;
4150 assoc_data->wmm = bss->wmm_used &&
4151 (local->hw.queues >= IEEE80211_NUM_ACS);
4152 assoc_data->supp_rates = bss->supp_rates;
4153 assoc_data->supp_rates_len = bss->supp_rates_len;
4156 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4157 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4158 assoc_data->ap_ht_param =
4159 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4161 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4162 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4163 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4164 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4165 sizeof(struct ieee80211_vht_cap));
4167 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4170 if (bss->wmm_used && bss->uapsd_supported &&
4171 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4172 sdata->wmm_acm != 0xff) {
4173 assoc_data->uapsd = true;
4174 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4176 assoc_data->uapsd = false;
4177 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4180 if (req->prev_bssid)
4181 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4184 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4185 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4187 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4188 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4191 if (req->crypto.control_port)
4192 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4194 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4196 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4197 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4199 /* kick off associate process */
4201 ifmgd->assoc_data = assoc_data;
4202 ifmgd->dtim_period = 0;
4203 ifmgd->have_beacon = false;
4205 err = ieee80211_prep_connection(sdata, req->bss, true);
4210 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4212 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4215 * Wait up to one beacon interval ...
4216 * should this be more if we miss one?
4218 sdata_info(sdata, "waiting for beacon from %pM\n",
4220 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4221 assoc_data->timeout_started = true;
4222 assoc_data->need_beacon = true;
4223 } else if (beacon_ies) {
4224 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4229 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4230 const struct ieee80211_tim_ie *tim;
4231 tim = (void *)(tim_ie + 2);
4232 ifmgd->dtim_period = tim->dtim_period;
4233 dtim_count = tim->dtim_count;
4235 ifmgd->have_beacon = true;
4236 assoc_data->timeout = jiffies;
4237 assoc_data->timeout_started = true;
4239 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4240 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4241 sdata->vif.bss_conf.sync_device_ts =
4242 bss->device_ts_beacon;
4243 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4246 assoc_data->timeout = jiffies;
4247 assoc_data->timeout_started = true;
4251 run_again(sdata, assoc_data->timeout);
4253 if (bss->corrupt_data) {
4254 char *corrupt_type = "data";
4255 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4256 if (bss->corrupt_data &
4257 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4258 corrupt_type = "beacon and probe response";
4260 corrupt_type = "beacon";
4261 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4262 corrupt_type = "probe response";
4263 sdata_info(sdata, "associating with AP with corrupt %s\n",
4269 memset(ifmgd->bssid, 0, ETH_ALEN);
4270 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4271 ifmgd->assoc_data = NULL;
4277 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4278 struct cfg80211_deauth_request *req)
4280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4281 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4282 bool tx = !req->local_state_change;
4283 bool report_frame = false;
4286 "deauthenticating from %pM by local choice (reason=%d)\n",
4287 req->bssid, req->reason_code);
4289 if (ifmgd->auth_data) {
4290 drv_mgd_prepare_tx(sdata->local, sdata);
4291 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4292 IEEE80211_STYPE_DEAUTH,
4293 req->reason_code, tx,
4295 ieee80211_destroy_auth_data(sdata, false);
4297 report_frame = true;
4301 if (ifmgd->associated &&
4302 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4303 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4304 req->reason_code, tx, frame_buf);
4305 report_frame = true;
4310 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4311 IEEE80211_DEAUTH_FRAME_LEN);
4316 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4317 struct cfg80211_disassoc_request *req)
4319 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4321 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4324 * cfg80211 should catch this ... but it's racy since
4325 * we can receive a disassoc frame, process it, hand it
4326 * to cfg80211 while that's in a locked section already
4327 * trying to tell us that the user wants to disconnect.
4329 if (ifmgd->associated != req->bss)
4333 "disassociating from %pM by local choice (reason=%d)\n",
4334 req->bss->bssid, req->reason_code);
4336 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4337 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4338 req->reason_code, !req->local_state_change,
4341 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4342 IEEE80211_DEAUTH_FRAME_LEN);
4347 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4349 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4352 * Make sure some work items will not run after this,
4353 * they will not do anything but might not have been
4354 * cancelled when disconnecting.
4356 cancel_work_sync(&ifmgd->monitor_work);
4357 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4358 cancel_work_sync(&ifmgd->request_smps_work);
4359 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4360 cancel_work_sync(&ifmgd->chswitch_work);
4363 if (ifmgd->assoc_data)
4364 ieee80211_destroy_assoc_data(sdata, false);
4365 if (ifmgd->auth_data)
4366 ieee80211_destroy_auth_data(sdata, false);
4367 del_timer_sync(&ifmgd->timer);
4368 sdata_unlock(sdata);
4371 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4372 enum nl80211_cqm_rssi_threshold_event rssi_event,
4375 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4377 trace_api_cqm_rssi_notify(sdata, rssi_event);
4379 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4381 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);