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_LONG (HZ / 2)
35 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36 #define IEEE80211_AUTH_MAX_TRIES 3
37 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
40 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41 #define IEEE80211_ASSOC_MAX_TRIES 3
43 static int max_nullfunc_tries = 2;
44 module_param(max_nullfunc_tries, int, 0644);
45 MODULE_PARM_DESC(max_nullfunc_tries,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48 static int max_probe_tries = 5;
49 module_param(max_probe_tries, int, 0644);
50 MODULE_PARM_DESC(max_probe_tries,
51 "Maximum probe tries before disconnecting (reason 4).");
54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
61 static int beacon_loss_count = 7;
62 module_param(beacon_loss_count, int, 0644);
63 MODULE_PARM_DESC(beacon_loss_count,
64 "Number of beacon intervals before we decide beacon was lost.");
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
70 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
76 static int probe_wait_ms = 500;
77 module_param(probe_wait_ms, int, 0644);
78 MODULE_PARM_DESC(probe_wait_ms,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
87 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
105 static void run_again(struct ieee80211_sub_if_data *sdata,
106 unsigned long timeout)
108 sdata_assert_lock(sdata);
110 if (!timer_pending(&sdata->u.mgd.timer) ||
111 time_before(timeout, sdata->u.mgd.timer.expires))
112 mod_timer(&sdata->u.mgd.timer, timeout);
115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
117 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
120 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
123 mod_timer(&sdata->u.mgd.bcn_mon_timer,
124 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131 if (unlikely(!sdata->u.mgd.associated))
134 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
137 mod_timer(&sdata->u.mgd.conn_mon_timer,
138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
140 ifmgd->probe_send_count = 0;
143 static int ecw2cw(int ecw)
145 return (1 << ecw) - 1;
149 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
150 struct ieee80211_supported_band *sband,
151 struct ieee80211_channel *channel,
152 const struct ieee80211_ht_operation *ht_oper,
153 const struct ieee80211_vht_operation *vht_oper,
154 struct cfg80211_chan_def *chandef, bool tracking)
156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157 struct cfg80211_chan_def vht_chandef;
160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
165 if (!ht_oper || !sband->ht_cap.ht_supported) {
166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
170 chandef->width = NL80211_CHAN_WIDTH_20;
172 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
174 /* check that channel matches the right operating channel */
175 if (!tracking && channel->center_freq != ht_cfreq) {
177 * It's possible that some APs are confused here;
178 * Netgear WNDR3700 sometimes reports 4 higher than
179 * the actual channel in association responses, but
180 * since we look at probe response/beacon data here
184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
185 channel->center_freq, ht_cfreq,
186 ht_oper->primary_chan, channel->band);
187 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
191 /* check 40 MHz support, if we have it */
192 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
193 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
194 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
195 chandef->width = NL80211_CHAN_WIDTH_40;
196 chandef->center_freq1 += 10;
198 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
199 chandef->width = NL80211_CHAN_WIDTH_40;
200 chandef->center_freq1 -= 10;
204 /* 40 MHz (and 80 MHz) must be supported for VHT */
205 ret = IEEE80211_STA_DISABLE_VHT;
206 /* also mark 40 MHz disabled */
207 ret |= IEEE80211_STA_DISABLE_40MHZ;
211 if (!vht_oper || !sband->vht_cap.vht_supported) {
212 ret = IEEE80211_STA_DISABLE_VHT;
216 vht_chandef.chan = channel;
217 vht_chandef.center_freq1 =
218 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
220 vht_chandef.center_freq2 = 0;
222 switch (vht_oper->chan_width) {
223 case IEEE80211_VHT_CHANWIDTH_USE_HT:
224 vht_chandef.width = chandef->width;
226 case IEEE80211_VHT_CHANWIDTH_80MHZ:
227 vht_chandef.width = NL80211_CHAN_WIDTH_80;
229 case IEEE80211_VHT_CHANWIDTH_160MHZ:
230 vht_chandef.width = NL80211_CHAN_WIDTH_160;
232 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
233 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
234 vht_chandef.center_freq2 =
235 ieee80211_channel_to_frequency(
236 vht_oper->center_freq_seg2_idx,
240 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
242 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
243 vht_oper->chan_width);
244 ret = IEEE80211_STA_DISABLE_VHT;
248 if (!cfg80211_chandef_valid(&vht_chandef)) {
249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
251 "AP VHT information is invalid, disable VHT\n");
252 ret = IEEE80211_STA_DISABLE_VHT;
256 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
261 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
262 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
264 "AP VHT information doesn't match HT, disable VHT\n");
265 ret = IEEE80211_STA_DISABLE_VHT;
269 *chandef = vht_chandef;
274 /* don't print the message below for VHT mismatch if VHT is disabled */
275 if (ret & IEEE80211_STA_DISABLE_VHT)
276 vht_chandef = *chandef;
279 * Ignore the DISABLED flag when we're already connected and only
280 * tracking the APs beacon for bandwidth changes - otherwise we
281 * might get disconnected here if we connect to an AP, update our
282 * regulatory information based on the AP's country IE and the
283 * information we have is wrong/outdated and disables the channel
284 * that we're actually using for the connection to the AP.
286 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
288 IEEE80211_CHAN_DISABLED)) {
289 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
290 ret = IEEE80211_STA_DISABLE_HT |
291 IEEE80211_STA_DISABLE_VHT;
295 ret |= ieee80211_chandef_downgrade(chandef);
298 if (chandef->width != vht_chandef.width && !tracking)
300 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
302 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
306 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
307 struct sta_info *sta,
308 const struct ieee80211_ht_operation *ht_oper,
309 const struct ieee80211_vht_operation *vht_oper,
310 const u8 *bssid, u32 *changed)
312 struct ieee80211_local *local = sdata->local;
313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
314 struct ieee80211_supported_band *sband;
315 struct ieee80211_channel *chan;
316 struct cfg80211_chan_def chandef;
319 enum ieee80211_sta_rx_bandwidth new_sta_bw;
322 /* if HT was/is disabled, don't track any bandwidth changes */
323 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
326 /* don't check VHT if we associated as non-VHT station */
327 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
330 if (WARN_ON_ONCE(!sta))
333 chan = sdata->vif.bss_conf.chandef.chan;
334 sband = local->hw.wiphy->bands[chan->band];
336 /* calculate new channel (type) based on HT/VHT operation IEs */
337 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
338 vht_oper, &chandef, true);
341 * Downgrade the new channel if we associated with restricted
342 * capabilities. For example, if we associated as a 20 MHz STA
343 * to a 40 MHz AP (due to regulatory, capabilities or config
344 * reasons) then switching to a 40 MHz channel now won't do us
345 * any good -- we couldn't use it with the AP.
347 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
348 chandef.width == NL80211_CHAN_WIDTH_80P80)
349 flags |= ieee80211_chandef_downgrade(&chandef);
350 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
351 chandef.width == NL80211_CHAN_WIDTH_160)
352 flags |= ieee80211_chandef_downgrade(&chandef);
353 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
354 chandef.width > NL80211_CHAN_WIDTH_20)
355 flags |= ieee80211_chandef_downgrade(&chandef);
357 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
361 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
362 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
363 chandef.center_freq1, chandef.center_freq2);
365 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
366 IEEE80211_STA_DISABLE_VHT |
367 IEEE80211_STA_DISABLE_40MHZ |
368 IEEE80211_STA_DISABLE_80P80MHZ |
369 IEEE80211_STA_DISABLE_160MHZ)) ||
370 !cfg80211_chandef_valid(&chandef)) {
372 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
377 switch (chandef.width) {
378 case NL80211_CHAN_WIDTH_20_NOHT:
379 case NL80211_CHAN_WIDTH_20:
380 new_sta_bw = IEEE80211_STA_RX_BW_20;
382 case NL80211_CHAN_WIDTH_40:
383 new_sta_bw = IEEE80211_STA_RX_BW_40;
385 case NL80211_CHAN_WIDTH_80:
386 new_sta_bw = IEEE80211_STA_RX_BW_80;
388 case NL80211_CHAN_WIDTH_80P80:
389 case NL80211_CHAN_WIDTH_160:
390 new_sta_bw = IEEE80211_STA_RX_BW_160;
396 if (new_sta_bw > sta->cur_max_bandwidth)
397 new_sta_bw = sta->cur_max_bandwidth;
399 if (new_sta_bw < sta->sta.bandwidth) {
400 sta->sta.bandwidth = new_sta_bw;
401 rate_control_rate_update(local, sband, sta,
402 IEEE80211_RC_BW_CHANGED);
405 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
408 "AP %pM changed bandwidth to incompatible one - disconnect\n",
413 if (new_sta_bw > sta->sta.bandwidth) {
414 sta->sta.bandwidth = new_sta_bw;
415 rate_control_rate_update(local, sband, sta,
416 IEEE80211_RC_BW_CHANGED);
419 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
421 /* if bss configuration changed store the new one */
422 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
423 *changed |= BSS_CHANGED_HT;
424 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
430 /* frame sending functions */
432 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
433 struct sk_buff *skb, u8 ap_ht_param,
434 struct ieee80211_supported_band *sband,
435 struct ieee80211_channel *channel,
436 enum ieee80211_smps_mode smps)
439 u32 flags = channel->flags;
441 struct ieee80211_sta_ht_cap ht_cap;
443 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
445 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
446 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
448 /* determine capability flags */
451 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
452 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
453 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
454 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
455 cap &= ~IEEE80211_HT_CAP_SGI_40;
458 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
459 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
460 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
461 cap &= ~IEEE80211_HT_CAP_SGI_40;
467 * If 40 MHz was disabled associate as though we weren't
468 * capable of 40 MHz -- some broken APs will never fall
469 * back to trying to transmit in 20 MHz.
471 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
472 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
473 cap &= ~IEEE80211_HT_CAP_SGI_40;
476 /* set SM PS mode properly */
477 cap &= ~IEEE80211_HT_CAP_SM_PS;
479 case IEEE80211_SMPS_AUTOMATIC:
480 case IEEE80211_SMPS_NUM_MODES:
482 case IEEE80211_SMPS_OFF:
483 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
484 IEEE80211_HT_CAP_SM_PS_SHIFT;
486 case IEEE80211_SMPS_STATIC:
487 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
488 IEEE80211_HT_CAP_SM_PS_SHIFT;
490 case IEEE80211_SMPS_DYNAMIC:
491 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
492 IEEE80211_HT_CAP_SM_PS_SHIFT;
496 /* reserve and fill IE */
497 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
498 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
501 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
503 struct ieee80211_supported_band *sband,
504 struct ieee80211_vht_cap *ap_vht_cap)
508 struct ieee80211_sta_vht_cap vht_cap;
510 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
512 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
513 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
515 /* determine capability flags */
518 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
519 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
520 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
523 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
524 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
525 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
529 * Some APs apparently get confused if our capabilities are better
530 * than theirs, so restrict what we advertise in the assoc request.
532 if (!(ap_vht_cap->vht_cap_info &
533 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
534 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
536 /* reserve and fill IE */
537 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
538 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
541 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
543 struct ieee80211_local *local = sdata->local;
544 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
545 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
547 struct ieee80211_mgmt *mgmt;
549 size_t offset = 0, noffset;
550 int i, count, rates_len, supp_rates_len, shift;
552 struct ieee80211_supported_band *sband;
553 struct ieee80211_chanctx_conf *chanctx_conf;
554 struct ieee80211_channel *chan;
555 u32 rate_flags, rates = 0;
557 sdata_assert_lock(sdata);
560 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
561 if (WARN_ON(!chanctx_conf)) {
565 chan = chanctx_conf->def.chan;
566 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
568 sband = local->hw.wiphy->bands[chan->band];
569 shift = ieee80211_vif_get_shift(&sdata->vif);
571 if (assoc_data->supp_rates_len) {
573 * Get all rates supported by the device and the AP as
574 * some APs don't like getting a superset of their rates
575 * in the association request (e.g. D-Link DAP 1353 in
578 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
579 assoc_data->supp_rates,
580 assoc_data->supp_rates_len,
584 * In case AP not provide any supported rates information
585 * before association, we send information element(s) with
586 * all rates that we support.
589 for (i = 0; i < sband->n_bitrates; i++) {
590 if ((rate_flags & sband->bitrates[i].flags)
598 skb = alloc_skb(local->hw.extra_tx_headroom +
599 sizeof(*mgmt) + /* bit too much but doesn't matter */
600 2 + assoc_data->ssid_len + /* SSID */
601 4 + rates_len + /* (extended) rates */
602 4 + /* power capability */
603 2 + 2 * sband->n_channels + /* supported channels */
604 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
605 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
606 assoc_data->ie_len + /* extra IEs */
612 skb_reserve(skb, local->hw.extra_tx_headroom);
614 capab = WLAN_CAPABILITY_ESS;
616 if (sband->band == IEEE80211_BAND_2GHZ) {
617 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
618 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
619 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
620 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
623 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
624 capab |= WLAN_CAPABILITY_PRIVACY;
626 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
627 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
628 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
630 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
632 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
633 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
634 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
636 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
638 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
639 IEEE80211_STYPE_REASSOC_REQ);
640 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
641 mgmt->u.reassoc_req.listen_interval =
642 cpu_to_le16(local->hw.conf.listen_interval);
643 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
647 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
648 IEEE80211_STYPE_ASSOC_REQ);
649 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
650 mgmt->u.assoc_req.listen_interval =
651 cpu_to_le16(local->hw.conf.listen_interval);
655 pos = skb_put(skb, 2 + assoc_data->ssid_len);
656 *pos++ = WLAN_EID_SSID;
657 *pos++ = assoc_data->ssid_len;
658 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
660 /* add all rates which were marked to be used above */
661 supp_rates_len = rates_len;
662 if (supp_rates_len > 8)
665 pos = skb_put(skb, supp_rates_len + 2);
666 *pos++ = WLAN_EID_SUPP_RATES;
667 *pos++ = supp_rates_len;
670 for (i = 0; i < sband->n_bitrates; i++) {
671 if (BIT(i) & rates) {
672 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
680 if (rates_len > count) {
681 pos = skb_put(skb, rates_len - count + 2);
682 *pos++ = WLAN_EID_EXT_SUPP_RATES;
683 *pos++ = rates_len - count;
685 for (i++; i < sband->n_bitrates; i++) {
686 if (BIT(i) & rates) {
688 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
695 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
696 /* 1. power capabilities */
697 pos = skb_put(skb, 4);
698 *pos++ = WLAN_EID_PWR_CAPABILITY;
700 *pos++ = 0; /* min tx power */
702 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
704 /* 2. supported channels */
705 /* TODO: get this in reg domain format */
706 pos = skb_put(skb, 2 * sband->n_channels + 2);
707 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
708 *pos++ = 2 * sband->n_channels;
709 for (i = 0; i < sband->n_channels; i++) {
710 *pos++ = ieee80211_frequency_to_channel(
711 sband->channels[i].center_freq);
712 *pos++ = 1; /* one channel in the subband*/
716 /* if present, add any custom IEs that go before HT */
717 if (assoc_data->ie_len) {
718 static const u8 before_ht[] = {
721 WLAN_EID_EXT_SUPP_RATES,
722 WLAN_EID_PWR_CAPABILITY,
723 WLAN_EID_SUPPORTED_CHANNELS,
726 WLAN_EID_RRM_ENABLED_CAPABILITIES,
727 WLAN_EID_MOBILITY_DOMAIN,
728 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
730 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
731 before_ht, ARRAY_SIZE(before_ht),
733 pos = skb_put(skb, noffset - offset);
734 memcpy(pos, assoc_data->ie + offset, noffset - offset);
738 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
739 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
740 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
742 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
743 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
744 sband, chan, sdata->smps_mode);
746 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
747 ieee80211_add_vht_ie(sdata, skb, sband,
748 &assoc_data->ap_vht_cap);
750 /* if present, add any custom non-vendor IEs that go after HT */
751 if (assoc_data->ie_len) {
752 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
755 pos = skb_put(skb, noffset - offset);
756 memcpy(pos, assoc_data->ie + offset, noffset - offset);
760 if (assoc_data->wmm) {
761 if (assoc_data->uapsd) {
762 qos_info = ifmgd->uapsd_queues;
763 qos_info |= (ifmgd->uapsd_max_sp_len <<
764 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
769 pos = skb_put(skb, 9);
770 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
771 *pos++ = 7; /* len */
772 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
775 *pos++ = 2; /* WME */
776 *pos++ = 0; /* WME info */
777 *pos++ = 1; /* WME ver */
781 /* add any remaining custom (i.e. vendor specific here) IEs */
782 if (assoc_data->ie_len) {
783 noffset = assoc_data->ie_len;
784 pos = skb_put(skb, noffset - offset);
785 memcpy(pos, assoc_data->ie + offset, noffset - offset);
788 drv_mgd_prepare_tx(local, sdata);
790 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
791 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
792 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
793 IEEE80211_TX_INTFL_MLME_CONN_TX;
794 ieee80211_tx_skb(sdata, skb);
797 void ieee80211_send_pspoll(struct ieee80211_local *local,
798 struct ieee80211_sub_if_data *sdata)
800 struct ieee80211_pspoll *pspoll;
803 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
807 pspoll = (struct ieee80211_pspoll *) skb->data;
808 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
810 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
811 ieee80211_tx_skb(sdata, skb);
814 void ieee80211_send_nullfunc(struct ieee80211_local *local,
815 struct ieee80211_sub_if_data *sdata,
819 struct ieee80211_hdr_3addr *nullfunc;
820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
822 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
826 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
828 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
830 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
831 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
833 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
834 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
836 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
837 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
839 ieee80211_tx_skb(sdata, skb);
842 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
843 struct ieee80211_sub_if_data *sdata)
846 struct ieee80211_hdr *nullfunc;
849 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
852 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
856 skb_reserve(skb, local->hw.extra_tx_headroom);
858 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
859 memset(nullfunc, 0, 30);
860 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
861 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
862 nullfunc->frame_control = fc;
863 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
864 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
865 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
866 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
868 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
869 ieee80211_tx_skb(sdata, skb);
872 /* spectrum management related things */
873 static void ieee80211_chswitch_work(struct work_struct *work)
875 struct ieee80211_sub_if_data *sdata =
876 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
877 struct ieee80211_local *local = sdata->local;
878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
882 if (!ieee80211_sdata_running(sdata))
886 if (!ifmgd->associated)
889 ret = ieee80211_vif_change_channel(sdata, &local->csa_chandef,
893 "vif channel switch failed, disconnecting\n");
894 ieee80211_queue_work(&sdata->local->hw,
895 &ifmgd->csa_connection_drop_work);
899 if (!local->use_chanctx) {
900 local->_oper_chandef = local->csa_chandef;
901 /* Call "hw_config" only if doing sw channel switch.
902 * Otherwise update the channel directly
904 if (!local->ops->channel_switch)
905 ieee80211_hw_config(local, 0);
907 local->hw.conf.chandef = local->_oper_chandef;
910 /* XXX: shouldn't really modify cfg80211-owned data! */
911 ifmgd->associated->channel = local->csa_chandef.chan;
913 /* XXX: wait for a beacon first? */
914 ieee80211_wake_queues_by_reason(&local->hw,
915 IEEE80211_MAX_QUEUE_MAP,
916 IEEE80211_QUEUE_STOP_REASON_CSA);
918 ieee80211_bss_info_change_notify(sdata, changed);
921 sdata->vif.csa_active = false;
922 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
926 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
928 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
929 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
931 trace_api_chswitch_done(sdata, success);
934 "driver channel switch failed, disconnecting\n");
935 ieee80211_queue_work(&sdata->local->hw,
936 &ifmgd->csa_connection_drop_work);
938 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
941 EXPORT_SYMBOL(ieee80211_chswitch_done);
943 static void ieee80211_chswitch_timer(unsigned long data)
945 struct ieee80211_sub_if_data *sdata =
946 (struct ieee80211_sub_if_data *) data;
948 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
952 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
953 u64 timestamp, struct ieee802_11_elems *elems,
956 struct ieee80211_local *local = sdata->local;
957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
958 struct cfg80211_bss *cbss = ifmgd->associated;
959 struct ieee80211_chanctx *chanctx;
960 enum ieee80211_band current_band;
961 struct ieee80211_csa_ie csa_ie;
964 sdata_assert_lock(sdata);
972 /* disregard subsequent announcements if we are already processing */
973 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
976 current_band = cbss->channel->band;
977 memset(&csa_ie, 0, sizeof(csa_ie));
978 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
980 ifmgd->associated->bssid, &csa_ie);
982 ieee80211_queue_work(&local->hw,
983 &ifmgd->csa_connection_drop_work);
987 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
988 IEEE80211_CHAN_DISABLED)) {
990 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
991 ifmgd->associated->bssid,
992 csa_ie.chandef.chan->center_freq,
993 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
994 csa_ie.chandef.center_freq2);
995 ieee80211_queue_work(&local->hw,
996 &ifmgd->csa_connection_drop_work);
1000 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1001 sdata->vif.csa_active = true;
1003 mutex_lock(&local->chanctx_mtx);
1004 if (local->use_chanctx) {
1005 u32 num_chanctx = 0;
1006 list_for_each_entry(chanctx, &local->chanctx_list, list)
1009 if (num_chanctx > 1 ||
1010 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1012 "not handling chan-switch with channel contexts\n");
1013 ieee80211_queue_work(&local->hw,
1014 &ifmgd->csa_connection_drop_work);
1015 mutex_unlock(&local->chanctx_mtx);
1020 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1021 ieee80211_queue_work(&local->hw,
1022 &ifmgd->csa_connection_drop_work);
1023 mutex_unlock(&local->chanctx_mtx);
1026 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1027 struct ieee80211_chanctx, conf);
1028 if (chanctx->refcount > 1) {
1030 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1031 ieee80211_queue_work(&local->hw,
1032 &ifmgd->csa_connection_drop_work);
1033 mutex_unlock(&local->chanctx_mtx);
1036 mutex_unlock(&local->chanctx_mtx);
1038 local->csa_chandef = csa_ie.chandef;
1041 ieee80211_stop_queues_by_reason(&local->hw,
1042 IEEE80211_MAX_QUEUE_MAP,
1043 IEEE80211_QUEUE_STOP_REASON_CSA);
1045 if (local->ops->channel_switch) {
1046 /* use driver's channel switch callback */
1047 struct ieee80211_channel_switch ch_switch = {
1048 .timestamp = timestamp,
1049 .block_tx = csa_ie.mode,
1050 .chandef = csa_ie.chandef,
1051 .count = csa_ie.count,
1054 drv_channel_switch(local, &ch_switch);
1058 /* channel switch handled in software */
1059 if (csa_ie.count <= 1)
1060 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1062 mod_timer(&ifmgd->chswitch_timer,
1063 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
1066 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1067 struct ieee80211_channel *channel,
1068 const u8 *country_ie, u8 country_ie_len,
1069 const u8 *pwr_constr_elem)
1071 struct ieee80211_country_ie_triplet *triplet;
1072 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1073 int i, chan_pwr, chan_increment, new_ap_level;
1074 bool have_chan_pwr = false;
1077 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1080 triplet = (void *)(country_ie + 3);
1081 country_ie_len -= 3;
1083 switch (channel->band) {
1087 case IEEE80211_BAND_2GHZ:
1088 case IEEE80211_BAND_60GHZ:
1091 case IEEE80211_BAND_5GHZ:
1097 while (country_ie_len >= 3) {
1098 u8 first_channel = triplet->chans.first_channel;
1100 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1103 for (i = 0; i < triplet->chans.num_channels; i++) {
1104 if (first_channel + i * chan_increment == chan) {
1105 have_chan_pwr = true;
1106 chan_pwr = triplet->chans.max_power;
1115 country_ie_len -= 3;
1121 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1123 if (sdata->ap_power_level == new_ap_level)
1127 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1128 new_ap_level, chan_pwr, *pwr_constr_elem,
1129 sdata->u.mgd.bssid);
1130 sdata->ap_power_level = new_ap_level;
1131 if (__ieee80211_recalc_txpower(sdata))
1132 return BSS_CHANGED_TXPOWER;
1137 static void ieee80211_enable_ps(struct ieee80211_local *local,
1138 struct ieee80211_sub_if_data *sdata)
1140 struct ieee80211_conf *conf = &local->hw.conf;
1143 * If we are scanning right now then the parameters will
1144 * take effect when scan finishes.
1146 if (local->scanning)
1149 if (conf->dynamic_ps_timeout > 0 &&
1150 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1151 mod_timer(&local->dynamic_ps_timer, jiffies +
1152 msecs_to_jiffies(conf->dynamic_ps_timeout));
1154 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1155 ieee80211_send_nullfunc(local, sdata, 1);
1157 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1158 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1161 conf->flags |= IEEE80211_CONF_PS;
1162 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1166 static void ieee80211_change_ps(struct ieee80211_local *local)
1168 struct ieee80211_conf *conf = &local->hw.conf;
1170 if (local->ps_sdata) {
1171 ieee80211_enable_ps(local, local->ps_sdata);
1172 } else if (conf->flags & IEEE80211_CONF_PS) {
1173 conf->flags &= ~IEEE80211_CONF_PS;
1174 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1175 del_timer_sync(&local->dynamic_ps_timer);
1176 cancel_work_sync(&local->dynamic_ps_enable_work);
1180 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1182 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1183 struct sta_info *sta = NULL;
1184 bool authorized = false;
1186 if (!mgd->powersave)
1192 if (!mgd->associated)
1195 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1198 if (!mgd->have_beacon)
1202 sta = sta_info_get(sdata, mgd->bssid);
1204 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1210 /* need to hold RTNL or interface lock */
1211 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1213 struct ieee80211_sub_if_data *sdata, *found = NULL;
1217 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1218 local->ps_sdata = NULL;
1222 list_for_each_entry(sdata, &local->interfaces, list) {
1223 if (!ieee80211_sdata_running(sdata))
1225 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1226 /* If an AP vif is found, then disable PS
1227 * by setting the count to zero thereby setting
1233 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1239 if (count == 1 && ieee80211_powersave_allowed(found)) {
1243 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1245 beaconint_us = ieee80211_tu_to_usec(
1246 found->vif.bss_conf.beacon_int);
1248 timeout = local->dynamic_ps_forced_timeout;
1251 * Go to full PSM if the user configures a very low
1252 * latency requirement.
1253 * The 2000 second value is there for compatibility
1254 * until the PM_QOS_NETWORK_LATENCY is configured
1257 if (latency > (1900 * USEC_PER_MSEC) &&
1258 latency != (2000 * USEC_PER_SEC))
1263 local->hw.conf.dynamic_ps_timeout = timeout;
1265 if (beaconint_us > latency) {
1266 local->ps_sdata = NULL;
1269 u8 dtimper = found->u.mgd.dtim_period;
1271 /* If the TIM IE is invalid, pretend the value is 1 */
1274 else if (dtimper > 1)
1275 maxslp = min_t(int, dtimper,
1276 latency / beaconint_us);
1278 local->hw.conf.max_sleep_period = maxslp;
1279 local->hw.conf.ps_dtim_period = dtimper;
1280 local->ps_sdata = found;
1283 local->ps_sdata = NULL;
1286 ieee80211_change_ps(local);
1289 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1291 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1293 if (sdata->vif.bss_conf.ps != ps_allowed) {
1294 sdata->vif.bss_conf.ps = ps_allowed;
1295 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1299 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1301 struct ieee80211_local *local =
1302 container_of(work, struct ieee80211_local,
1303 dynamic_ps_disable_work);
1305 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1306 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1307 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1310 ieee80211_wake_queues_by_reason(&local->hw,
1311 IEEE80211_MAX_QUEUE_MAP,
1312 IEEE80211_QUEUE_STOP_REASON_PS);
1315 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1317 struct ieee80211_local *local =
1318 container_of(work, struct ieee80211_local,
1319 dynamic_ps_enable_work);
1320 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1321 struct ieee80211_if_managed *ifmgd;
1322 unsigned long flags;
1325 /* can only happen when PS was just disabled anyway */
1329 ifmgd = &sdata->u.mgd;
1331 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1334 if (local->hw.conf.dynamic_ps_timeout > 0) {
1335 /* don't enter PS if TX frames are pending */
1336 if (drv_tx_frames_pending(local)) {
1337 mod_timer(&local->dynamic_ps_timer, jiffies +
1339 local->hw.conf.dynamic_ps_timeout));
1344 * transmission can be stopped by others which leads to
1345 * dynamic_ps_timer expiry. Postpone the ps timer if it
1346 * is not the actual idle state.
1348 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1349 for (q = 0; q < local->hw.queues; q++) {
1350 if (local->queue_stop_reasons[q]) {
1351 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1353 mod_timer(&local->dynamic_ps_timer, jiffies +
1355 local->hw.conf.dynamic_ps_timeout));
1359 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1362 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1363 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1364 if (drv_tx_frames_pending(local)) {
1365 mod_timer(&local->dynamic_ps_timer, jiffies +
1367 local->hw.conf.dynamic_ps_timeout));
1369 ieee80211_send_nullfunc(local, sdata, 1);
1370 /* Flush to get the tx status of nullfunc frame */
1371 ieee80211_flush_queues(local, sdata);
1375 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1376 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1377 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1378 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1379 local->hw.conf.flags |= IEEE80211_CONF_PS;
1380 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1384 void ieee80211_dynamic_ps_timer(unsigned long data)
1386 struct ieee80211_local *local = (void *) data;
1388 if (local->quiescing || local->suspended)
1391 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1394 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1396 struct delayed_work *delayed_work =
1397 container_of(work, struct delayed_work, work);
1398 struct ieee80211_sub_if_data *sdata =
1399 container_of(delayed_work, struct ieee80211_sub_if_data,
1400 dfs_cac_timer_work);
1401 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1403 ieee80211_vif_release_channel(sdata);
1404 cfg80211_cac_event(sdata->dev, &chandef,
1405 NL80211_RADAR_CAC_FINISHED,
1410 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1411 struct ieee80211_sub_if_data *sdata,
1412 const u8 *wmm_param, size_t wmm_param_len)
1414 struct ieee80211_tx_queue_params params;
1415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1419 u8 uapsd_queues = 0;
1421 if (!local->ops->conf_tx)
1424 if (local->hw.queues < IEEE80211_NUM_ACS)
1430 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1433 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1434 uapsd_queues = ifmgd->uapsd_queues;
1436 count = wmm_param[6] & 0x0f;
1437 if (count == ifmgd->wmm_last_param_set)
1439 ifmgd->wmm_last_param_set = count;
1441 pos = wmm_param + 8;
1442 left = wmm_param_len - 8;
1444 memset(¶ms, 0, sizeof(params));
1447 for (; left >= 4; left -= 4, pos += 4) {
1448 int aci = (pos[0] >> 5) & 0x03;
1449 int acm = (pos[0] >> 4) & 0x01;
1457 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1458 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1464 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1465 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1471 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1472 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1479 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1480 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1485 params.aifs = pos[0] & 0x0f;
1486 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1487 params.cw_min = ecw2cw(pos[1] & 0x0f);
1488 params.txop = get_unaligned_le16(pos + 2);
1490 params.uapsd = uapsd;
1493 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1495 params.aifs, params.cw_min, params.cw_max,
1496 params.txop, params.uapsd);
1497 sdata->tx_conf[queue] = params;
1498 if (drv_conf_tx(local, sdata, queue, ¶ms))
1500 "failed to set TX queue parameters for queue %d\n",
1504 /* enable WMM or activate new settings */
1505 sdata->vif.bss_conf.qos = true;
1509 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1511 lockdep_assert_held(&sdata->local->mtx);
1513 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1514 ieee80211_run_deferred_scan(sdata->local);
1517 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1519 mutex_lock(&sdata->local->mtx);
1520 __ieee80211_stop_poll(sdata);
1521 mutex_unlock(&sdata->local->mtx);
1524 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1525 u16 capab, bool erp_valid, u8 erp)
1527 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1529 bool use_protection;
1530 bool use_short_preamble;
1531 bool use_short_slot;
1534 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1535 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1537 use_protection = false;
1538 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1541 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1542 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1543 use_short_slot = true;
1545 if (use_protection != bss_conf->use_cts_prot) {
1546 bss_conf->use_cts_prot = use_protection;
1547 changed |= BSS_CHANGED_ERP_CTS_PROT;
1550 if (use_short_preamble != bss_conf->use_short_preamble) {
1551 bss_conf->use_short_preamble = use_short_preamble;
1552 changed |= BSS_CHANGED_ERP_PREAMBLE;
1555 if (use_short_slot != bss_conf->use_short_slot) {
1556 bss_conf->use_short_slot = use_short_slot;
1557 changed |= BSS_CHANGED_ERP_SLOT;
1563 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1564 struct cfg80211_bss *cbss,
1565 u32 bss_info_changed)
1567 struct ieee80211_bss *bss = (void *)cbss->priv;
1568 struct ieee80211_local *local = sdata->local;
1569 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1571 bss_info_changed |= BSS_CHANGED_ASSOC;
1572 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1573 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1575 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1576 beacon_loss_count * bss_conf->beacon_int));
1578 sdata->u.mgd.associated = cbss;
1579 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1581 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1583 if (sdata->vif.p2p) {
1584 const struct cfg80211_bss_ies *ies;
1587 ies = rcu_dereference(cbss->ies);
1591 ret = cfg80211_get_p2p_attr(
1592 ies->data, ies->len,
1593 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1594 (u8 *) &bss_conf->p2p_noa_attr,
1595 sizeof(bss_conf->p2p_noa_attr));
1597 sdata->u.mgd.p2p_noa_index =
1598 bss_conf->p2p_noa_attr.index;
1599 bss_info_changed |= BSS_CHANGED_P2P_PS;
1605 /* just to be sure */
1606 ieee80211_stop_poll(sdata);
1608 ieee80211_led_assoc(local, 1);
1610 if (sdata->u.mgd.have_beacon) {
1612 * If the AP is buggy we may get here with no DTIM period
1613 * known, so assume it's 1 which is the only safe assumption
1614 * in that case, although if the TIM IE is broken powersave
1615 * probably just won't work at all.
1617 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1618 bss_conf->beacon_rate = bss->beacon_rate;
1619 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1621 bss_conf->beacon_rate = NULL;
1622 bss_conf->dtim_period = 0;
1625 bss_conf->assoc = 1;
1627 /* Tell the driver to monitor connection quality (if supported) */
1628 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1629 bss_conf->cqm_rssi_thold)
1630 bss_info_changed |= BSS_CHANGED_CQM;
1632 /* Enable ARP filtering */
1633 if (bss_conf->arp_addr_cnt)
1634 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1636 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1638 mutex_lock(&local->iflist_mtx);
1639 ieee80211_recalc_ps(local, -1);
1640 mutex_unlock(&local->iflist_mtx);
1642 ieee80211_recalc_smps(sdata);
1643 ieee80211_recalc_ps_vif(sdata);
1645 netif_carrier_on(sdata->dev);
1648 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1649 u16 stype, u16 reason, bool tx,
1652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1653 struct ieee80211_local *local = sdata->local;
1656 sdata_assert_lock(sdata);
1658 if (WARN_ON_ONCE(tx && !frame_buf))
1661 if (WARN_ON(!ifmgd->associated))
1664 ieee80211_stop_poll(sdata);
1666 ifmgd->associated = NULL;
1667 netif_carrier_off(sdata->dev);
1670 * if we want to get out of ps before disassoc (why?) we have
1671 * to do it before sending disassoc, as otherwise the null-packet
1674 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1675 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1676 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1678 local->ps_sdata = NULL;
1680 /* disable per-vif ps */
1681 ieee80211_recalc_ps_vif(sdata);
1683 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1685 ieee80211_flush_queues(local, sdata);
1687 /* deauthenticate/disassociate now */
1688 if (tx || frame_buf)
1689 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1690 reason, tx, frame_buf);
1692 /* flush out frame */
1694 ieee80211_flush_queues(local, sdata);
1696 /* clear bssid only after building the needed mgmt frames */
1697 memset(ifmgd->bssid, 0, ETH_ALEN);
1699 /* remove AP and TDLS peers */
1700 sta_info_flush_defer(sdata);
1702 /* finally reset all BSS / config parameters */
1703 changed |= ieee80211_reset_erp_info(sdata);
1705 ieee80211_led_assoc(local, 0);
1706 changed |= BSS_CHANGED_ASSOC;
1707 sdata->vif.bss_conf.assoc = false;
1709 ifmgd->p2p_noa_index = -1;
1710 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1711 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1713 /* on the next assoc, re-program HT/VHT parameters */
1714 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1715 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1716 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1717 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1719 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1721 del_timer_sync(&local->dynamic_ps_timer);
1722 cancel_work_sync(&local->dynamic_ps_enable_work);
1724 /* Disable ARP filtering */
1725 if (sdata->vif.bss_conf.arp_addr_cnt)
1726 changed |= BSS_CHANGED_ARP_FILTER;
1728 sdata->vif.bss_conf.qos = false;
1729 changed |= BSS_CHANGED_QOS;
1731 /* The BSSID (not really interesting) and HT changed */
1732 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1733 ieee80211_bss_info_change_notify(sdata, changed);
1735 /* disassociated - set to defaults now */
1736 ieee80211_set_wmm_default(sdata, false);
1738 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1739 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1740 del_timer_sync(&sdata->u.mgd.timer);
1741 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1743 sdata->vif.bss_conf.dtim_period = 0;
1744 sdata->vif.bss_conf.beacon_rate = NULL;
1746 ifmgd->have_beacon = false;
1749 ieee80211_vif_release_channel(sdata);
1751 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1754 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1755 struct ieee80211_hdr *hdr)
1758 * We can postpone the mgd.timer whenever receiving unicast frames
1759 * from AP because we know that the connection is working both ways
1760 * at that time. But multicast frames (and hence also beacons) must
1761 * be ignored here, because we need to trigger the timer during
1762 * data idle periods for sending the periodic probe request to the
1763 * AP we're connected to.
1765 if (is_multicast_ether_addr(hdr->addr1))
1768 ieee80211_sta_reset_conn_monitor(sdata);
1771 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1773 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1774 struct ieee80211_local *local = sdata->local;
1776 mutex_lock(&local->mtx);
1777 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1780 __ieee80211_stop_poll(sdata);
1782 mutex_lock(&local->iflist_mtx);
1783 ieee80211_recalc_ps(local, -1);
1784 mutex_unlock(&local->iflist_mtx);
1786 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1790 * We've received a probe response, but are not sure whether
1791 * we have or will be receiving any beacons or data, so let's
1792 * schedule the timers again, just in case.
1794 ieee80211_sta_reset_beacon_monitor(sdata);
1796 mod_timer(&ifmgd->conn_mon_timer,
1797 round_jiffies_up(jiffies +
1798 IEEE80211_CONNECTION_IDLE_TIME));
1800 mutex_unlock(&local->mtx);
1803 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1804 struct ieee80211_hdr *hdr, bool ack)
1806 if (!ieee80211_is_data(hdr->frame_control))
1809 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1810 sdata->u.mgd.probe_send_count > 0) {
1812 ieee80211_sta_reset_conn_monitor(sdata);
1814 sdata->u.mgd.nullfunc_failed = true;
1815 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1820 ieee80211_sta_reset_conn_monitor(sdata);
1823 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1825 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1827 u8 *dst = ifmgd->associated->bssid;
1828 u8 unicast_limit = max(1, max_probe_tries - 3);
1831 * Try sending broadcast probe requests for the last three
1832 * probe requests after the first ones failed since some
1833 * buggy APs only support broadcast probe requests.
1835 if (ifmgd->probe_send_count >= unicast_limit)
1839 * When the hardware reports an accurate Tx ACK status, it's
1840 * better to send a nullfunc frame instead of a probe request,
1841 * as it will kick us off the AP quickly if we aren't associated
1842 * anymore. The timeout will be reset if the frame is ACKed by
1845 ifmgd->probe_send_count++;
1847 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1848 ifmgd->nullfunc_failed = false;
1849 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1854 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1855 if (WARN_ON_ONCE(ssid == NULL))
1860 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1861 0, (u32) -1, true, 0,
1862 ifmgd->associated->channel, false);
1866 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1867 run_again(sdata, ifmgd->probe_timeout);
1868 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1869 ieee80211_flush_queues(sdata->local, sdata);
1872 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1876 bool already = false;
1878 if (!ieee80211_sdata_running(sdata))
1883 if (!ifmgd->associated)
1886 mutex_lock(&sdata->local->mtx);
1888 if (sdata->local->tmp_channel || sdata->local->scanning) {
1889 mutex_unlock(&sdata->local->mtx);
1894 mlme_dbg_ratelimited(sdata,
1895 "detected beacon loss from AP (missed %d beacons) - probing\n",
1898 ieee80211_cqm_rssi_notify(&sdata->vif,
1899 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
1904 * The driver/our work has already reported this event or the
1905 * connection monitoring has kicked in and we have already sent
1906 * a probe request. Or maybe the AP died and the driver keeps
1907 * reporting until we disassociate...
1909 * In either case we have to ignore the current call to this
1910 * function (except for setting the correct probe reason bit)
1911 * because otherwise we would reset the timer every time and
1912 * never check whether we received a probe response!
1914 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1917 mutex_unlock(&sdata->local->mtx);
1922 mutex_lock(&sdata->local->iflist_mtx);
1923 ieee80211_recalc_ps(sdata->local, -1);
1924 mutex_unlock(&sdata->local->iflist_mtx);
1926 ifmgd->probe_send_count = 0;
1927 ieee80211_mgd_probe_ap_send(sdata);
1929 sdata_unlock(sdata);
1932 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1933 struct ieee80211_vif *vif)
1935 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1936 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1937 struct cfg80211_bss *cbss;
1938 struct sk_buff *skb;
1942 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1945 sdata_assert_lock(sdata);
1947 if (ifmgd->associated)
1948 cbss = ifmgd->associated;
1949 else if (ifmgd->auth_data)
1950 cbss = ifmgd->auth_data->bss;
1951 else if (ifmgd->assoc_data)
1952 cbss = ifmgd->assoc_data->bss;
1957 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
1958 if (WARN_ON_ONCE(ssid == NULL))
1963 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
1964 (u32) -1, cbss->channel,
1971 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1973 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1975 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1976 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1979 if (!ifmgd->associated) {
1980 sdata_unlock(sdata);
1984 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1985 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1987 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1988 sdata->vif.csa_active = false;
1989 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1990 IEEE80211_MAX_QUEUE_MAP,
1991 IEEE80211_QUEUE_STOP_REASON_CSA);
1993 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
1994 IEEE80211_DEAUTH_FRAME_LEN);
1995 sdata_unlock(sdata);
1998 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2000 struct ieee80211_sub_if_data *sdata =
2001 container_of(work, struct ieee80211_sub_if_data,
2002 u.mgd.beacon_connection_loss_work);
2003 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2004 struct sta_info *sta;
2006 if (ifmgd->associated) {
2008 sta = sta_info_get(sdata, ifmgd->bssid);
2010 sta->beacon_loss_count++;
2014 if (ifmgd->connection_loss) {
2015 sdata_info(sdata, "Connection to AP %pM lost\n",
2017 __ieee80211_disconnect(sdata);
2019 ieee80211_mgd_probe_ap(sdata, true);
2023 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2025 struct ieee80211_sub_if_data *sdata =
2026 container_of(work, struct ieee80211_sub_if_data,
2027 u.mgd.csa_connection_drop_work);
2029 __ieee80211_disconnect(sdata);
2032 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2034 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2035 struct ieee80211_hw *hw = &sdata->local->hw;
2037 trace_api_beacon_loss(sdata);
2039 sdata->u.mgd.connection_loss = false;
2040 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2042 EXPORT_SYMBOL(ieee80211_beacon_loss);
2044 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2046 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2047 struct ieee80211_hw *hw = &sdata->local->hw;
2049 trace_api_connection_loss(sdata);
2051 sdata->u.mgd.connection_loss = true;
2052 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2054 EXPORT_SYMBOL(ieee80211_connection_loss);
2057 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2060 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2062 sdata_assert_lock(sdata);
2065 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2067 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2068 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2069 sdata->u.mgd.flags = 0;
2070 ieee80211_vif_release_channel(sdata);
2073 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2075 sdata->u.mgd.auth_data = NULL;
2078 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2079 struct ieee80211_mgmt *mgmt, size_t len)
2081 struct ieee80211_local *local = sdata->local;
2082 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2084 struct ieee802_11_elems elems;
2087 pos = mgmt->u.auth.variable;
2088 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2089 if (!elems.challenge)
2091 auth_data->expected_transaction = 4;
2092 drv_mgd_prepare_tx(sdata->local, sdata);
2093 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2094 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2095 IEEE80211_TX_INTFL_MLME_CONN_TX;
2096 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2097 elems.challenge - 2, elems.challenge_len + 2,
2098 auth_data->bss->bssid, auth_data->bss->bssid,
2099 auth_data->key, auth_data->key_len,
2100 auth_data->key_idx, tx_flags);
2103 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2104 struct ieee80211_mgmt *mgmt, size_t len)
2106 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2108 u16 auth_alg, auth_transaction, status_code;
2109 struct sta_info *sta;
2111 sdata_assert_lock(sdata);
2116 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2119 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2121 if (!ether_addr_equal(bssid, mgmt->bssid))
2124 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2125 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2126 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2128 if (auth_alg != ifmgd->auth_data->algorithm ||
2129 auth_transaction != ifmgd->auth_data->expected_transaction) {
2130 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2131 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2133 ifmgd->auth_data->expected_transaction);
2137 if (status_code != WLAN_STATUS_SUCCESS) {
2138 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2139 mgmt->sa, status_code);
2140 ieee80211_destroy_auth_data(sdata, false);
2141 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2145 switch (ifmgd->auth_data->algorithm) {
2146 case WLAN_AUTH_OPEN:
2147 case WLAN_AUTH_LEAP:
2151 case WLAN_AUTH_SHARED_KEY:
2152 if (ifmgd->auth_data->expected_transaction != 4) {
2153 ieee80211_auth_challenge(sdata, mgmt, len);
2154 /* need another frame */
2159 WARN_ONCE(1, "invalid auth alg %d",
2160 ifmgd->auth_data->algorithm);
2164 sdata_info(sdata, "authenticated\n");
2165 ifmgd->auth_data->done = true;
2166 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2167 ifmgd->auth_data->timeout_started = true;
2168 run_again(sdata, ifmgd->auth_data->timeout);
2170 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2171 ifmgd->auth_data->expected_transaction != 2) {
2173 * Report auth frame to user space for processing since another
2174 * round of Authentication frames is still needed.
2176 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2180 /* move station state to auth */
2181 mutex_lock(&sdata->local->sta_mtx);
2182 sta = sta_info_get(sdata, bssid);
2184 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2187 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2188 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2191 mutex_unlock(&sdata->local->sta_mtx);
2193 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2196 mutex_unlock(&sdata->local->sta_mtx);
2197 /* ignore frame -- wait for timeout */
2201 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2202 struct ieee80211_mgmt *mgmt, size_t len)
2204 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2205 const u8 *bssid = NULL;
2208 sdata_assert_lock(sdata);
2213 if (!ifmgd->associated ||
2214 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2217 bssid = ifmgd->associated->bssid;
2219 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2221 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2222 bssid, reason_code);
2224 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2226 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2230 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2231 struct ieee80211_mgmt *mgmt, size_t len)
2233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2236 sdata_assert_lock(sdata);
2241 if (!ifmgd->associated ||
2242 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2245 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2247 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2248 mgmt->sa, reason_code);
2250 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2252 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2255 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2256 u8 *supp_rates, unsigned int supp_rates_len,
2257 u32 *rates, u32 *basic_rates,
2258 bool *have_higher_than_11mbit,
2259 int *min_rate, int *min_rate_index,
2260 int shift, u32 rate_flags)
2264 for (i = 0; i < supp_rates_len; i++) {
2265 int rate = supp_rates[i] & 0x7f;
2266 bool is_basic = !!(supp_rates[i] & 0x80);
2268 if ((rate * 5 * (1 << shift)) > 110)
2269 *have_higher_than_11mbit = true;
2272 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2273 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2275 * Note: Even through the membership selector and the basic
2276 * rate flag share the same bit, they are not exactly
2279 if (!!(supp_rates[i] & 0x80) &&
2280 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2283 for (j = 0; j < sband->n_bitrates; j++) {
2284 struct ieee80211_rate *br;
2287 br = &sband->bitrates[j];
2288 if ((rate_flags & br->flags) != rate_flags)
2291 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2292 if (brate == rate) {
2295 *basic_rates |= BIT(j);
2296 if ((rate * 5) < *min_rate) {
2297 *min_rate = rate * 5;
2298 *min_rate_index = j;
2306 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2309 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2311 sdata_assert_lock(sdata);
2314 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2316 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2317 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2318 sdata->u.mgd.flags = 0;
2319 ieee80211_vif_release_channel(sdata);
2323 sdata->u.mgd.assoc_data = NULL;
2326 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2327 struct cfg80211_bss *cbss,
2328 struct ieee80211_mgmt *mgmt, size_t len)
2330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2331 struct ieee80211_local *local = sdata->local;
2332 struct ieee80211_supported_band *sband;
2333 struct sta_info *sta;
2335 u16 capab_info, aid;
2336 struct ieee802_11_elems elems;
2337 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2338 const struct cfg80211_bss_ies *bss_ies = NULL;
2339 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2344 /* AssocResp and ReassocResp have identical structure */
2346 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2347 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2349 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2350 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2352 aid &= ~(BIT(15) | BIT(14));
2354 ifmgd->broken_ap = false;
2356 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2357 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2360 ifmgd->broken_ap = true;
2363 pos = mgmt->u.assoc_resp.variable;
2364 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2366 if (!elems.supp_rates) {
2367 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2374 * Some APs are erroneously not including some information in their
2375 * (re)association response frames. Try to recover by using the data
2376 * from the beacon or probe response. This seems to afflict mobile
2377 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2378 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2380 if ((assoc_data->wmm && !elems.wmm_param) ||
2381 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2382 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2383 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2384 (!elems.vht_cap_elem || !elems.vht_operation))) {
2385 const struct cfg80211_bss_ies *ies;
2386 struct ieee802_11_elems bss_elems;
2389 ies = rcu_dereference(cbss->ies);
2391 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2397 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2399 if (assoc_data->wmm &&
2400 !elems.wmm_param && bss_elems.wmm_param) {
2401 elems.wmm_param = bss_elems.wmm_param;
2403 "AP bug: WMM param missing from AssocResp\n");
2407 * Also check if we requested HT/VHT, otherwise the AP doesn't
2408 * have to include the IEs in the (re)association response.
2410 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2411 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2412 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2414 "AP bug: HT capability missing from AssocResp\n");
2416 if (!elems.ht_operation && bss_elems.ht_operation &&
2417 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2418 elems.ht_operation = bss_elems.ht_operation;
2420 "AP bug: HT operation missing from AssocResp\n");
2422 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2423 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2424 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2426 "AP bug: VHT capa missing from AssocResp\n");
2428 if (!elems.vht_operation && bss_elems.vht_operation &&
2429 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2430 elems.vht_operation = bss_elems.vht_operation;
2432 "AP bug: VHT operation missing from AssocResp\n");
2437 * We previously checked these in the beacon/probe response, so
2438 * they should be present here. This is just a safety net.
2440 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2441 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2443 "HT AP is missing WMM params or HT capability/operation\n");
2448 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2449 (!elems.vht_cap_elem || !elems.vht_operation)) {
2451 "VHT AP is missing VHT capability/operation\n");
2456 mutex_lock(&sdata->local->sta_mtx);
2458 * station info was already allocated and inserted before
2459 * the association and should be available to us
2461 sta = sta_info_get(sdata, cbss->bssid);
2462 if (WARN_ON(!sta)) {
2463 mutex_unlock(&sdata->local->sta_mtx);
2468 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2470 /* Set up internal HT/VHT capabilities */
2471 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2472 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2473 elems.ht_cap_elem, sta);
2475 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2476 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2477 elems.vht_cap_elem, sta);
2480 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2481 * in their association response, so ignore that data for our own
2482 * configuration. If it changed since the last beacon, we'll get the
2483 * next beacon and update then.
2487 * If an operating mode notification IE is present, override the
2488 * NSS calculation (that would be done in rate_control_rate_init())
2489 * and use the # of streams from that element.
2491 if (elems.opmode_notif &&
2492 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2495 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2496 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2498 sta->sta.rx_nss = nss;
2501 rate_control_rate_init(sta);
2503 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2504 set_sta_flag(sta, WLAN_STA_MFP);
2506 if (elems.wmm_param)
2507 set_sta_flag(sta, WLAN_STA_WME);
2509 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2510 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2511 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2514 "failed to move station %pM to desired state\n",
2516 WARN_ON(__sta_info_destroy(sta));
2517 mutex_unlock(&sdata->local->sta_mtx);
2522 mutex_unlock(&sdata->local->sta_mtx);
2525 * Always handle WMM once after association regardless
2526 * of the first value the AP uses. Setting -1 here has
2527 * that effect because the AP values is an unsigned
2530 ifmgd->wmm_last_param_set = -1;
2532 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2533 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2534 elems.wmm_param_len);
2536 ieee80211_set_wmm_default(sdata, false);
2537 changed |= BSS_CHANGED_QOS;
2539 /* set AID and assoc capability,
2540 * ieee80211_set_associated() will tell the driver */
2541 bss_conf->aid = aid;
2542 bss_conf->assoc_capability = capab_info;
2543 ieee80211_set_associated(sdata, cbss, changed);
2546 * If we're using 4-addr mode, let the AP know that we're
2547 * doing so, so that it can create the STA VLAN on its side
2549 if (ifmgd->use_4addr)
2550 ieee80211_send_4addr_nullfunc(local, sdata);
2553 * Start timer to probe the connection to the AP now.
2554 * Also start the timer that will detect beacon loss.
2556 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2557 ieee80211_sta_reset_beacon_monitor(sdata);
2565 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2566 struct ieee80211_mgmt *mgmt,
2569 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2570 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2571 u16 capab_info, status_code, aid;
2572 struct ieee802_11_elems elems;
2575 struct cfg80211_bss *bss;
2577 sdata_assert_lock(sdata);
2581 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2585 * AssocResp and ReassocResp have identical structure, so process both
2586 * of them in this function.
2592 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2593 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2594 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2595 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2598 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2599 reassoc ? "Rea" : "A", mgmt->sa,
2600 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2602 pos = mgmt->u.assoc_resp.variable;
2603 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2605 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2606 elems.timeout_int &&
2607 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2609 tu = le32_to_cpu(elems.timeout_int->value);
2610 ms = tu * 1024 / 1000;
2612 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2614 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2615 assoc_data->timeout_started = true;
2616 if (ms > IEEE80211_ASSOC_TIMEOUT)
2617 run_again(sdata, assoc_data->timeout);
2621 bss = assoc_data->bss;
2623 if (status_code != WLAN_STATUS_SUCCESS) {
2624 sdata_info(sdata, "%pM denied association (code=%d)\n",
2625 mgmt->sa, status_code);
2626 ieee80211_destroy_assoc_data(sdata, false);
2628 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2629 /* oops -- internal error -- send timeout for now */
2630 ieee80211_destroy_assoc_data(sdata, false);
2631 cfg80211_assoc_timeout(sdata->dev, bss);
2634 sdata_info(sdata, "associated\n");
2637 * destroy assoc_data afterwards, as otherwise an idle
2638 * recalc after assoc_data is NULL but before associated
2639 * is set can cause the interface to go idle
2641 ieee80211_destroy_assoc_data(sdata, true);
2644 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2647 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2648 struct ieee80211_mgmt *mgmt, size_t len,
2649 struct ieee80211_rx_status *rx_status,
2650 struct ieee802_11_elems *elems)
2652 struct ieee80211_local *local = sdata->local;
2654 struct ieee80211_bss *bss;
2655 struct ieee80211_channel *channel;
2657 sdata_assert_lock(sdata);
2659 if (elems->ds_params)
2660 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2663 freq = rx_status->freq;
2665 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2667 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2670 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2673 ieee80211_rx_bss_put(local, bss);
2674 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2679 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2680 struct sk_buff *skb)
2682 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2683 struct ieee80211_if_managed *ifmgd;
2684 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2685 size_t baselen, len = skb->len;
2686 struct ieee802_11_elems elems;
2688 ifmgd = &sdata->u.mgd;
2690 sdata_assert_lock(sdata);
2692 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2693 return; /* ignore ProbeResp to foreign address */
2695 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2699 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2702 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2704 if (ifmgd->associated &&
2705 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2706 ieee80211_reset_ap_probe(sdata);
2708 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2709 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2710 /* got probe response, continue with auth */
2711 sdata_info(sdata, "direct probe responded\n");
2712 ifmgd->auth_data->tries = 0;
2713 ifmgd->auth_data->timeout = jiffies;
2714 ifmgd->auth_data->timeout_started = true;
2715 run_again(sdata, ifmgd->auth_data->timeout);
2720 * This is the canonical list of information elements we care about,
2721 * the filter code also gives us all changes to the Microsoft OUI
2722 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2724 * We implement beacon filtering in software since that means we can
2725 * avoid processing the frame here and in cfg80211, and userspace
2726 * will not be able to tell whether the hardware supports it or not.
2728 * XXX: This list needs to be dynamic -- userspace needs to be able to
2729 * add items it requires. It also needs to be able to tell us to
2730 * look out for other vendor IEs.
2732 static const u64 care_about_ies =
2733 (1ULL << WLAN_EID_COUNTRY) |
2734 (1ULL << WLAN_EID_ERP_INFO) |
2735 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2736 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2737 (1ULL << WLAN_EID_HT_CAPABILITY) |
2738 (1ULL << WLAN_EID_HT_OPERATION);
2740 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2741 struct ieee80211_mgmt *mgmt, size_t len,
2742 struct ieee80211_rx_status *rx_status)
2744 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2745 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2747 struct ieee802_11_elems elems;
2748 struct ieee80211_local *local = sdata->local;
2749 struct ieee80211_chanctx_conf *chanctx_conf;
2750 struct ieee80211_channel *chan;
2751 struct sta_info *sta;
2757 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2759 sdata_assert_lock(sdata);
2761 /* Process beacon from the current BSS */
2762 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2767 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2768 if (!chanctx_conf) {
2773 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2777 chan = chanctx_conf->def.chan;
2780 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2781 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2782 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2783 len - baselen, false, &elems);
2785 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2786 if (elems.tim && !elems.parse_error) {
2787 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2788 ifmgd->dtim_period = tim_ie->dtim_period;
2790 ifmgd->have_beacon = true;
2791 ifmgd->assoc_data->need_beacon = false;
2792 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2793 sdata->vif.bss_conf.sync_tsf =
2794 le64_to_cpu(mgmt->u.beacon.timestamp);
2795 sdata->vif.bss_conf.sync_device_ts =
2796 rx_status->device_timestamp;
2798 sdata->vif.bss_conf.sync_dtim_count =
2799 elems.tim->dtim_count;
2801 sdata->vif.bss_conf.sync_dtim_count = 0;
2803 /* continue assoc process */
2804 ifmgd->assoc_data->timeout = jiffies;
2805 ifmgd->assoc_data->timeout_started = true;
2806 run_again(sdata, ifmgd->assoc_data->timeout);
2810 if (!ifmgd->associated ||
2811 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2813 bssid = ifmgd->associated->bssid;
2815 /* Track average RSSI from the Beacon frames of the current AP */
2816 ifmgd->last_beacon_signal = rx_status->signal;
2817 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2818 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2819 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2820 ifmgd->last_cqm_event_signal = 0;
2821 ifmgd->count_beacon_signal = 1;
2822 ifmgd->last_ave_beacon_signal = 0;
2824 ifmgd->ave_beacon_signal =
2825 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2826 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2827 ifmgd->ave_beacon_signal) / 16;
2828 ifmgd->count_beacon_signal++;
2831 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2832 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2833 int sig = ifmgd->ave_beacon_signal;
2834 int last_sig = ifmgd->last_ave_beacon_signal;
2837 * if signal crosses either of the boundaries, invoke callback
2838 * with appropriate parameters
2840 if (sig > ifmgd->rssi_max_thold &&
2841 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2842 ifmgd->last_ave_beacon_signal = sig;
2843 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
2844 } else if (sig < ifmgd->rssi_min_thold &&
2845 (last_sig >= ifmgd->rssi_max_thold ||
2847 ifmgd->last_ave_beacon_signal = sig;
2848 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
2852 if (bss_conf->cqm_rssi_thold &&
2853 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2854 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2855 int sig = ifmgd->ave_beacon_signal / 16;
2856 int last_event = ifmgd->last_cqm_event_signal;
2857 int thold = bss_conf->cqm_rssi_thold;
2858 int hyst = bss_conf->cqm_rssi_hyst;
2860 (last_event == 0 || sig < last_event - hyst)) {
2861 ifmgd->last_cqm_event_signal = sig;
2862 ieee80211_cqm_rssi_notify(
2864 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2866 } else if (sig > thold &&
2867 (last_event == 0 || sig > last_event + hyst)) {
2868 ifmgd->last_cqm_event_signal = sig;
2869 ieee80211_cqm_rssi_notify(
2871 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2876 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
2877 mlme_dbg_ratelimited(sdata,
2878 "cancelling AP probe due to a received beacon\n");
2879 ieee80211_reset_ap_probe(sdata);
2883 * Push the beacon loss detection into the future since
2884 * we are processing a beacon from the AP just now.
2886 ieee80211_sta_reset_beacon_monitor(sdata);
2888 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2889 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2890 len - baselen, false, &elems,
2891 care_about_ies, ncrc);
2893 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2894 bool directed_tim = ieee80211_check_tim(elems.tim,
2898 if (local->hw.conf.dynamic_ps_timeout > 0) {
2899 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2900 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2901 ieee80211_hw_config(local,
2902 IEEE80211_CONF_CHANGE_PS);
2904 ieee80211_send_nullfunc(local, sdata, 0);
2905 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2906 local->pspolling = true;
2909 * Here is assumed that the driver will be
2910 * able to send ps-poll frame and receive a
2911 * response even though power save mode is
2912 * enabled, but some drivers might require
2913 * to disable power save here. This needs
2914 * to be investigated.
2916 ieee80211_send_pspoll(local, sdata);
2921 if (sdata->vif.p2p) {
2922 struct ieee80211_p2p_noa_attr noa = {};
2925 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2927 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2928 (u8 *) &noa, sizeof(noa));
2930 if (sdata->u.mgd.p2p_noa_index != noa.index) {
2931 /* valid noa_attr and index changed */
2932 sdata->u.mgd.p2p_noa_index = noa.index;
2933 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
2934 changed |= BSS_CHANGED_P2P_PS;
2936 * make sure we update all information, the CRC
2937 * mechanism doesn't look at P2P attributes.
2939 ifmgd->beacon_crc_valid = false;
2941 } else if (sdata->u.mgd.p2p_noa_index != -1) {
2942 /* noa_attr not found and we had valid noa_attr before */
2943 sdata->u.mgd.p2p_noa_index = -1;
2944 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
2945 changed |= BSS_CHANGED_P2P_PS;
2946 ifmgd->beacon_crc_valid = false;
2950 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2952 ifmgd->beacon_crc = ncrc;
2953 ifmgd->beacon_crc_valid = true;
2955 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2957 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2960 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
2961 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2962 elems.wmm_param_len))
2963 changed |= BSS_CHANGED_QOS;
2966 * If we haven't had a beacon before, tell the driver about the
2967 * DTIM period (and beacon timing if desired) now.
2969 if (!ifmgd->have_beacon) {
2970 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2972 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2974 bss_conf->dtim_period = 1;
2976 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2977 sdata->vif.bss_conf.sync_tsf =
2978 le64_to_cpu(mgmt->u.beacon.timestamp);
2979 sdata->vif.bss_conf.sync_device_ts =
2980 rx_status->device_timestamp;
2982 sdata->vif.bss_conf.sync_dtim_count =
2983 elems.tim->dtim_count;
2985 sdata->vif.bss_conf.sync_dtim_count = 0;
2988 changed |= BSS_CHANGED_BEACON_INFO;
2989 ifmgd->have_beacon = true;
2991 mutex_lock(&local->iflist_mtx);
2992 ieee80211_recalc_ps(local, -1);
2993 mutex_unlock(&local->iflist_mtx);
2995 ieee80211_recalc_ps_vif(sdata);
2998 if (elems.erp_info) {
3000 erp_value = elems.erp_info[0];
3004 changed |= ieee80211_handle_bss_capability(sdata,
3005 le16_to_cpu(mgmt->u.beacon.capab_info),
3006 erp_valid, erp_value);
3008 mutex_lock(&local->sta_mtx);
3009 sta = sta_info_get(sdata, bssid);
3011 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3012 elems.vht_operation, bssid, &changed)) {
3013 mutex_unlock(&local->sta_mtx);
3014 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3015 WLAN_REASON_DEAUTH_LEAVING,
3017 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3018 sizeof(deauth_buf));
3022 if (sta && elems.opmode_notif)
3023 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3024 rx_status->band, true);
3025 mutex_unlock(&local->sta_mtx);
3027 if (elems.country_elem && elems.pwr_constr_elem &&
3028 mgmt->u.probe_resp.capab_info &
3029 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3030 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3032 elems.country_elem_len,
3033 elems.pwr_constr_elem);
3035 ieee80211_bss_info_change_notify(sdata, changed);
3038 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3039 struct sk_buff *skb)
3041 struct ieee80211_rx_status *rx_status;
3042 struct ieee80211_mgmt *mgmt;
3044 struct ieee802_11_elems elems;
3047 rx_status = (struct ieee80211_rx_status *) skb->cb;
3048 mgmt = (struct ieee80211_mgmt *) skb->data;
3049 fc = le16_to_cpu(mgmt->frame_control);
3053 switch (fc & IEEE80211_FCTL_STYPE) {
3054 case IEEE80211_STYPE_BEACON:
3055 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3057 case IEEE80211_STYPE_PROBE_RESP:
3058 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3060 case IEEE80211_STYPE_AUTH:
3061 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3063 case IEEE80211_STYPE_DEAUTH:
3064 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3066 case IEEE80211_STYPE_DISASSOC:
3067 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3069 case IEEE80211_STYPE_ASSOC_RESP:
3070 case IEEE80211_STYPE_REASSOC_RESP:
3071 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3073 case IEEE80211_STYPE_ACTION:
3074 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3075 ies_len = skb->len -
3076 offsetof(struct ieee80211_mgmt,
3077 u.action.u.chan_switch.variable);
3082 ieee802_11_parse_elems(
3083 mgmt->u.action.u.chan_switch.variable,
3084 ies_len, true, &elems);
3086 if (elems.parse_error)
3089 ieee80211_sta_process_chanswitch(sdata,
3092 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3093 ies_len = skb->len -
3094 offsetof(struct ieee80211_mgmt,
3095 u.action.u.ext_chan_switch.variable);
3100 ieee802_11_parse_elems(
3101 mgmt->u.action.u.ext_chan_switch.variable,
3102 ies_len, true, &elems);
3104 if (elems.parse_error)
3107 /* for the handling code pretend this was also an IE */
3108 elems.ext_chansw_ie =
3109 &mgmt->u.action.u.ext_chan_switch.data;
3111 ieee80211_sta_process_chanswitch(sdata,
3117 sdata_unlock(sdata);
3120 static void ieee80211_sta_timer(unsigned long data)
3122 struct ieee80211_sub_if_data *sdata =
3123 (struct ieee80211_sub_if_data *) data;
3125 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3128 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3129 u8 *bssid, u8 reason, bool tx)
3131 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3133 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3136 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3137 IEEE80211_DEAUTH_FRAME_LEN);
3140 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3142 struct ieee80211_local *local = sdata->local;
3143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3144 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3147 sdata_assert_lock(sdata);
3149 if (WARN_ON_ONCE(!auth_data))
3154 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3155 sdata_info(sdata, "authentication with %pM timed out\n",
3156 auth_data->bss->bssid);
3159 * Most likely AP is not in the range so remove the
3160 * bss struct for that AP.
3162 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3167 drv_mgd_prepare_tx(local, sdata);
3169 if (auth_data->bss->proberesp_ies) {
3173 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3174 auth_data->bss->bssid, auth_data->tries,
3175 IEEE80211_AUTH_MAX_TRIES);
3177 auth_data->expected_transaction = 2;
3179 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3180 trans = auth_data->sae_trans;
3181 status = auth_data->sae_status;
3182 auth_data->expected_transaction = trans;
3185 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3186 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3187 IEEE80211_TX_INTFL_MLME_CONN_TX;
3189 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3190 auth_data->data, auth_data->data_len,
3191 auth_data->bss->bssid,
3192 auth_data->bss->bssid, NULL, 0, 0,
3197 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3198 auth_data->bss->bssid, auth_data->tries,
3199 IEEE80211_AUTH_MAX_TRIES);
3202 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3208 * Direct probe is sent to broadcast address as some APs
3209 * will not answer to direct packet in unassociated state.
3211 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3212 NULL, 0, (u32) -1, true, 0,
3213 auth_data->bss->channel, false);
3217 if (tx_flags == 0) {
3218 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3219 auth_data->timeout_started = true;
3220 run_again(sdata, auth_data->timeout);
3222 auth_data->timeout =
3223 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3224 auth_data->timeout_started = true;
3225 run_again(sdata, auth_data->timeout);
3231 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3233 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3234 struct ieee80211_local *local = sdata->local;
3236 sdata_assert_lock(sdata);
3238 assoc_data->tries++;
3239 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3240 sdata_info(sdata, "association with %pM timed out\n",
3241 assoc_data->bss->bssid);
3244 * Most likely AP is not in the range so remove the
3245 * bss struct for that AP.
3247 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3252 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3253 assoc_data->bss->bssid, assoc_data->tries,
3254 IEEE80211_ASSOC_MAX_TRIES);
3255 ieee80211_send_assoc(sdata);
3257 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3258 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3259 assoc_data->timeout_started = true;
3260 run_again(sdata, assoc_data->timeout);
3262 assoc_data->timeout =
3263 round_jiffies_up(jiffies +
3264 IEEE80211_ASSOC_TIMEOUT_LONG);
3265 assoc_data->timeout_started = true;
3266 run_again(sdata, assoc_data->timeout);
3272 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3273 __le16 fc, bool acked)
3275 struct ieee80211_local *local = sdata->local;
3277 sdata->u.mgd.status_fc = fc;
3278 sdata->u.mgd.status_acked = acked;
3279 sdata->u.mgd.status_received = true;
3281 ieee80211_queue_work(&local->hw, &sdata->work);
3284 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3286 struct ieee80211_local *local = sdata->local;
3287 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3291 if (ifmgd->status_received) {
3292 __le16 fc = ifmgd->status_fc;
3293 bool status_acked = ifmgd->status_acked;
3295 ifmgd->status_received = false;
3296 if (ifmgd->auth_data &&
3297 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3299 ifmgd->auth_data->timeout =
3300 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3301 run_again(sdata, ifmgd->auth_data->timeout);
3303 ifmgd->auth_data->timeout = jiffies - 1;
3305 ifmgd->auth_data->timeout_started = true;
3306 } else if (ifmgd->assoc_data &&
3307 (ieee80211_is_assoc_req(fc) ||
3308 ieee80211_is_reassoc_req(fc))) {
3310 ifmgd->assoc_data->timeout =
3311 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3312 run_again(sdata, ifmgd->assoc_data->timeout);
3314 ifmgd->assoc_data->timeout = jiffies - 1;
3316 ifmgd->assoc_data->timeout_started = true;
3320 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3321 time_after(jiffies, ifmgd->auth_data->timeout)) {
3322 if (ifmgd->auth_data->done) {
3324 * ok ... we waited for assoc but userspace didn't,
3325 * so let's just kill the auth data
3327 ieee80211_destroy_auth_data(sdata, false);
3328 } else if (ieee80211_probe_auth(sdata)) {
3331 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3333 ieee80211_destroy_auth_data(sdata, false);
3335 cfg80211_auth_timeout(sdata->dev, bssid);
3337 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3338 run_again(sdata, ifmgd->auth_data->timeout);
3340 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3341 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3342 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3343 ieee80211_do_assoc(sdata)) {
3344 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3346 ieee80211_destroy_assoc_data(sdata, false);
3347 cfg80211_assoc_timeout(sdata->dev, bss);
3349 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3350 run_again(sdata, ifmgd->assoc_data->timeout);
3352 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3353 ifmgd->associated) {
3357 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3359 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3360 max_tries = max_nullfunc_tries;
3362 max_tries = max_probe_tries;
3364 /* ACK received for nullfunc probing frame */
3365 if (!ifmgd->probe_send_count)
3366 ieee80211_reset_ap_probe(sdata);
3367 else if (ifmgd->nullfunc_failed) {
3368 if (ifmgd->probe_send_count < max_tries) {
3370 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3371 bssid, ifmgd->probe_send_count,
3373 ieee80211_mgd_probe_ap_send(sdata);
3376 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3378 ieee80211_sta_connection_lost(sdata, bssid,
3379 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3382 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3383 run_again(sdata, ifmgd->probe_timeout);
3384 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3386 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3387 bssid, probe_wait_ms);
3388 ieee80211_sta_connection_lost(sdata, bssid,
3389 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3390 } else if (ifmgd->probe_send_count < max_tries) {
3392 "No probe response from AP %pM after %dms, try %d/%i\n",
3393 bssid, probe_wait_ms,
3394 ifmgd->probe_send_count, max_tries);
3395 ieee80211_mgd_probe_ap_send(sdata);
3398 * We actually lost the connection ... or did we?
3401 wiphy_debug(local->hw.wiphy,
3402 "%s: No probe response from AP %pM"
3403 " after %dms, disconnecting.\n",
3405 bssid, probe_wait_ms);
3407 ieee80211_sta_connection_lost(sdata, bssid,
3408 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3412 sdata_unlock(sdata);
3415 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3417 struct ieee80211_sub_if_data *sdata =
3418 (struct ieee80211_sub_if_data *) data;
3419 struct ieee80211_local *local = sdata->local;
3421 if (local->quiescing)
3424 sdata->u.mgd.connection_loss = false;
3425 ieee80211_queue_work(&sdata->local->hw,
3426 &sdata->u.mgd.beacon_connection_loss_work);
3429 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3431 struct ieee80211_sub_if_data *sdata =
3432 (struct ieee80211_sub_if_data *) data;
3433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3434 struct ieee80211_local *local = sdata->local;
3436 if (local->quiescing)
3439 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3442 static void ieee80211_sta_monitor_work(struct work_struct *work)
3444 struct ieee80211_sub_if_data *sdata =
3445 container_of(work, struct ieee80211_sub_if_data,
3446 u.mgd.monitor_work);
3448 ieee80211_mgd_probe_ap(sdata, false);
3451 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3455 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3456 __ieee80211_stop_poll(sdata);
3458 /* let's probe the connection once */
3459 flags = sdata->local->hw.flags;
3460 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3461 ieee80211_queue_work(&sdata->local->hw,
3462 &sdata->u.mgd.monitor_work);
3463 /* and do all the other regular work too */
3464 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3469 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3471 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3474 if (!ifmgd->associated) {
3475 sdata_unlock(sdata);
3479 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3480 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3481 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3482 ieee80211_sta_connection_lost(sdata,
3483 ifmgd->associated->bssid,
3484 WLAN_REASON_UNSPECIFIED,
3486 sdata_unlock(sdata);
3489 sdata_unlock(sdata);
3493 /* interface setup */
3494 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3496 struct ieee80211_if_managed *ifmgd;
3498 ifmgd = &sdata->u.mgd;
3499 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3500 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3501 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3502 ieee80211_beacon_connection_loss_work);
3503 INIT_WORK(&ifmgd->csa_connection_drop_work,
3504 ieee80211_csa_connection_drop_work);
3505 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3506 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3507 (unsigned long) sdata);
3508 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3509 (unsigned long) sdata);
3510 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3511 (unsigned long) sdata);
3512 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3513 (unsigned long) sdata);
3516 ifmgd->powersave = sdata->wdev.ps;
3517 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3518 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3519 ifmgd->p2p_noa_index = -1;
3521 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3522 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3524 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3527 /* scan finished notification */
3528 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3530 struct ieee80211_sub_if_data *sdata;
3532 /* Restart STA timers */
3534 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3535 if (ieee80211_sdata_running(sdata))
3536 ieee80211_restart_sta_timer(sdata);
3541 int ieee80211_max_network_latency(struct notifier_block *nb,
3542 unsigned long data, void *dummy)
3544 s32 latency_usec = (s32) data;
3545 struct ieee80211_local *local =
3546 container_of(nb, struct ieee80211_local,
3547 network_latency_notifier);
3549 mutex_lock(&local->iflist_mtx);
3550 ieee80211_recalc_ps(local, latency_usec);
3551 mutex_unlock(&local->iflist_mtx);
3556 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3557 struct cfg80211_bss *cbss)
3559 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3560 const u8 *ht_cap_ie, *vht_cap_ie;
3561 const struct ieee80211_ht_cap *ht_cap;
3562 const struct ieee80211_vht_cap *vht_cap;
3565 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3568 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3569 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3570 ht_cap = (void *)(ht_cap_ie + 2);
3571 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3573 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3574 * "Tx Unequal Modulation Supported" fields.
3578 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3581 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3582 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3586 vht_cap = (void *)(vht_cap_ie + 2);
3587 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3588 for (nss = 8; nss > 0; nss--) {
3589 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3590 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3593 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3594 chains = max(chains, nss);
3600 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3601 struct cfg80211_bss *cbss)
3603 struct ieee80211_local *local = sdata->local;
3604 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3605 const struct ieee80211_ht_operation *ht_oper = NULL;
3606 const struct ieee80211_vht_operation *vht_oper = NULL;
3607 struct ieee80211_supported_band *sband;
3608 struct cfg80211_chan_def chandef;
3611 sband = local->hw.wiphy->bands[cbss->channel->band];
3613 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3614 IEEE80211_STA_DISABLE_80P80MHZ |
3615 IEEE80211_STA_DISABLE_160MHZ);
3619 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3620 sband->ht_cap.ht_supported) {
3621 const u8 *ht_oper_ie, *ht_cap;
3623 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3624 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3625 ht_oper = (void *)(ht_oper_ie + 2);
3627 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3628 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3629 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3634 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3635 sband->vht_cap.vht_supported) {
3636 const u8 *vht_oper_ie, *vht_cap;
3638 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3639 WLAN_EID_VHT_OPERATION);
3640 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3641 vht_oper = (void *)(vht_oper_ie + 2);
3642 if (vht_oper && !ht_oper) {
3645 "AP advertised VHT without HT, disabling both\n");
3646 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3647 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3650 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3651 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3652 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3657 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3662 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3667 /* will change later if needed */
3668 sdata->smps_mode = IEEE80211_SMPS_OFF;
3671 * If this fails (possibly due to channel context sharing
3672 * on incompatible channels, e.g. 80+80 and 160 sharing the
3673 * same control channel) try to use a smaller bandwidth.
3675 ret = ieee80211_vif_use_channel(sdata, &chandef,
3676 IEEE80211_CHANCTX_SHARED);
3678 /* don't downgrade for 5 and 10 MHz channels, though. */
3679 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3680 chandef.width == NL80211_CHAN_WIDTH_10)
3683 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3684 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
3685 ret = ieee80211_vif_use_channel(sdata, &chandef,
3686 IEEE80211_CHANCTX_SHARED);
3691 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3692 struct cfg80211_bss *cbss, bool assoc)
3694 struct ieee80211_local *local = sdata->local;
3695 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3696 struct ieee80211_bss *bss = (void *)cbss->priv;
3697 struct sta_info *new_sta = NULL;
3698 bool have_sta = false;
3701 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3706 have_sta = sta_info_get(sdata, cbss->bssid);
3711 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3716 u32 rates = 0, basic_rates = 0;
3717 bool have_higher_than_11mbit;
3718 int min_rate = INT_MAX, min_rate_index = -1;
3719 struct ieee80211_chanctx_conf *chanctx_conf;
3720 struct ieee80211_supported_band *sband;
3721 const struct cfg80211_bss_ies *ies;
3725 sband = local->hw.wiphy->bands[cbss->channel->band];
3727 err = ieee80211_prep_channel(sdata, cbss);
3729 sta_info_free(local, new_sta);
3732 shift = ieee80211_vif_get_shift(&sdata->vif);
3735 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3736 if (WARN_ON(!chanctx_conf)) {
3740 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3743 ieee80211_get_rates(sband, bss->supp_rates,
3744 bss->supp_rates_len,
3745 &rates, &basic_rates,
3746 &have_higher_than_11mbit,
3747 &min_rate, &min_rate_index,
3751 * This used to be a workaround for basic rates missing
3752 * in the association response frame. Now that we no
3753 * longer use the basic rates from there, it probably
3754 * doesn't happen any more, but keep the workaround so
3755 * in case some *other* APs are buggy in different ways
3756 * we can connect -- with a warning.
3758 if (!basic_rates && min_rate_index >= 0) {
3760 "No basic rates, using min rate instead\n");
3761 basic_rates = BIT(min_rate_index);
3764 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3765 sdata->vif.bss_conf.basic_rates = basic_rates;
3767 /* cf. IEEE 802.11 9.2.12 */
3768 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3769 have_higher_than_11mbit)
3770 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3772 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3774 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3776 /* set timing information */
3777 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3779 ies = rcu_dereference(cbss->beacon_ies);
3783 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3784 sdata->vif.bss_conf.sync_device_ts =
3785 bss->device_ts_beacon;
3786 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3787 ies->data, ies->len);
3788 if (tim_ie && tim_ie[1] >= 2)
3789 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3791 sdata->vif.bss_conf.sync_dtim_count = 0;
3792 } else if (!(local->hw.flags &
3793 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3794 ies = rcu_dereference(cbss->proberesp_ies);
3795 /* must be non-NULL since beacon IEs were NULL */
3796 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3797 sdata->vif.bss_conf.sync_device_ts =
3798 bss->device_ts_presp;
3799 sdata->vif.bss_conf.sync_dtim_count = 0;
3801 sdata->vif.bss_conf.sync_tsf = 0;
3802 sdata->vif.bss_conf.sync_device_ts = 0;
3803 sdata->vif.bss_conf.sync_dtim_count = 0;
3807 /* tell driver about BSSID, basic rates and timing */
3808 ieee80211_bss_info_change_notify(sdata,
3809 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3810 BSS_CHANGED_BEACON_INT);
3813 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3815 err = sta_info_insert(new_sta);
3819 "failed to insert STA entry for the AP (error %d)\n",
3824 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3830 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3831 struct cfg80211_auth_request *req)
3833 struct ieee80211_local *local = sdata->local;
3834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3835 struct ieee80211_mgd_auth_data *auth_data;
3839 /* prepare auth data structure */
3841 switch (req->auth_type) {
3842 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3843 auth_alg = WLAN_AUTH_OPEN;
3845 case NL80211_AUTHTYPE_SHARED_KEY:
3846 if (IS_ERR(local->wep_tx_tfm))
3848 auth_alg = WLAN_AUTH_SHARED_KEY;
3850 case NL80211_AUTHTYPE_FT:
3851 auth_alg = WLAN_AUTH_FT;
3853 case NL80211_AUTHTYPE_NETWORK_EAP:
3854 auth_alg = WLAN_AUTH_LEAP;
3856 case NL80211_AUTHTYPE_SAE:
3857 auth_alg = WLAN_AUTH_SAE;
3863 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3864 req->ie_len, GFP_KERNEL);
3868 auth_data->bss = req->bss;
3870 if (req->sae_data_len >= 4) {
3871 __le16 *pos = (__le16 *) req->sae_data;
3872 auth_data->sae_trans = le16_to_cpu(pos[0]);
3873 auth_data->sae_status = le16_to_cpu(pos[1]);
3874 memcpy(auth_data->data, req->sae_data + 4,
3875 req->sae_data_len - 4);
3876 auth_data->data_len += req->sae_data_len - 4;
3879 if (req->ie && req->ie_len) {
3880 memcpy(&auth_data->data[auth_data->data_len],
3881 req->ie, req->ie_len);
3882 auth_data->data_len += req->ie_len;
3885 if (req->key && req->key_len) {
3886 auth_data->key_len = req->key_len;
3887 auth_data->key_idx = req->key_idx;
3888 memcpy(auth_data->key, req->key, req->key_len);
3891 auth_data->algorithm = auth_alg;
3893 /* try to authenticate/probe */
3895 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3896 ifmgd->assoc_data) {
3901 if (ifmgd->auth_data)
3902 ieee80211_destroy_auth_data(sdata, false);
3904 /* prep auth_data so we don't go into idle on disassoc */
3905 ifmgd->auth_data = auth_data;
3907 if (ifmgd->associated) {
3908 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3910 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3911 WLAN_REASON_UNSPECIFIED,
3914 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3918 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
3920 err = ieee80211_prep_connection(sdata, req->bss, false);
3924 err = ieee80211_probe_auth(sdata);
3926 sta_info_destroy_addr(sdata, req->bss->bssid);
3930 /* hold our own reference */
3931 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
3935 memset(ifmgd->bssid, 0, ETH_ALEN);
3936 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3937 ifmgd->auth_data = NULL;
3943 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
3944 const u8 *wmm_param, int len)
3952 if (wmm_param[5] != 1 /* version */)
3955 pos = wmm_param + 8;
3958 for (; left >= 4; left -= 4, pos += 4) {
3959 u8 aifsn = pos[0] & 0x0f;
3960 u8 ecwmin = pos[1] & 0x0f;
3961 u8 ecwmax = (pos[1] & 0xf0) >> 4;
3962 int aci = (pos[0] >> 5) & 0x03;
3966 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
3970 if (ecwmin > ecwmax) {
3972 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
3973 ecwmin, ecwmax, aci);
3981 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3982 struct cfg80211_assoc_request *req)
3984 struct ieee80211_local *local = sdata->local;
3985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3986 struct ieee80211_bss *bss = (void *)req->bss->priv;
3987 struct ieee80211_mgd_assoc_data *assoc_data;
3988 const struct cfg80211_bss_ies *beacon_ies;
3989 struct ieee80211_supported_band *sband;
3990 const u8 *ssidie, *ht_ie, *vht_ie;
3993 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3998 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4004 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4005 assoc_data->ssid_len = ssidie[1];
4008 if (ifmgd->associated) {
4009 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4011 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4012 WLAN_REASON_UNSPECIFIED,
4015 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4019 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4024 if (ifmgd->assoc_data) {
4029 if (ifmgd->auth_data) {
4032 /* keep sta info, bssid if matching */
4033 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4034 ieee80211_destroy_auth_data(sdata, match);
4037 /* prepare assoc data */
4039 ifmgd->beacon_crc_valid = false;
4041 assoc_data->wmm = bss->wmm_used &&
4042 (local->hw.queues >= IEEE80211_NUM_ACS);
4043 if (assoc_data->wmm) {
4044 /* try to check validity of WMM params IE */
4045 const struct cfg80211_bss_ies *ies;
4046 const u8 *wp, *start, *end;
4049 ies = rcu_dereference(req->bss->ies);
4051 end = start + ies->len;
4054 wp = cfg80211_find_vendor_ie(
4056 WLAN_OUI_TYPE_MICROSOFT_WMM,
4057 start, end - start);
4060 start = wp + wp[1] + 2;
4061 /* if this IE is too short, try the next */
4064 /* if this IE is WMM params, we found what we wanted */
4069 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4071 assoc_data->wmm = false;
4072 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4078 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4079 * We still associate in non-HT mode (11a/b/g) if any one of these
4080 * ciphers is configured as pairwise.
4081 * We can set this to true for non-11n hardware, that'll be checked
4082 * separately along with the peer capabilities.
4084 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4085 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4086 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4087 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4088 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4089 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4090 netdev_info(sdata->dev,
4091 "disabling HT/VHT due to WEP/TKIP use\n");
4095 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4096 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4097 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4100 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4101 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4103 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4104 sband = local->hw.wiphy->bands[req->bss->channel->band];
4105 if (!sband->ht_cap.ht_supported ||
4106 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4107 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4108 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4109 if (!bss->wmm_used &&
4110 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4111 netdev_info(sdata->dev,
4112 "disabling HT as WMM/QoS is not supported by the AP\n");
4115 /* disable VHT if we don't support it or the AP doesn't use WMM */
4116 if (!sband->vht_cap.vht_supported ||
4117 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4118 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4119 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4120 if (!bss->wmm_used &&
4121 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
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->supp_rates = bss->supp_rates;
4151 assoc_data->supp_rates_len = bss->supp_rates_len;
4154 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4155 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4156 assoc_data->ap_ht_param =
4157 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4159 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4160 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4161 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4162 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4163 sizeof(struct ieee80211_vht_cap));
4165 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4168 if (bss->wmm_used && bss->uapsd_supported &&
4169 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4170 sdata->wmm_acm != 0xff) {
4171 assoc_data->uapsd = true;
4172 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4174 assoc_data->uapsd = false;
4175 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4178 if (req->prev_bssid)
4179 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4182 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4183 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4185 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4186 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4189 if (req->crypto.control_port)
4190 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4192 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4194 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4195 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4196 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
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 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4365 ieee80211_destroy_assoc_data(sdata, false);
4366 cfg80211_assoc_timeout(sdata->dev, bss);
4368 if (ifmgd->auth_data)
4369 ieee80211_destroy_auth_data(sdata, false);
4370 del_timer_sync(&ifmgd->timer);
4371 sdata_unlock(sdata);
4374 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4375 enum nl80211_cqm_rssi_threshold_event rssi_event,
4378 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4380 trace_api_cqm_rssi_notify(sdata, rssi_event);
4382 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4384 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);