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>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 Intel Deutschland GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42 #define IEEE80211_ASSOC_MAX_TRIES 3
44 static int max_nullfunc_tries = 2;
45 module_param(max_nullfunc_tries, int, 0644);
46 MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49 static int max_probe_tries = 5;
50 module_param(max_probe_tries, int, 0644);
51 MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
62 static int beacon_loss_count = 7;
63 module_param(beacon_loss_count, int, 0644);
64 MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
77 static int probe_wait_ms = 500;
78 module_param(probe_wait_ms, int, 0644);
79 MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
84 * How many Beacon frames need to have been used in average signal strength
85 * before starting to indicate signal change events.
87 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
90 * We can have multiple work items (and connection probing)
91 * scheduling this timer, but we need to take care to only
92 * reschedule it when it should fire _earlier_ than it was
93 * asked for before, or if it's not pending right now. This
94 * function ensures that. Note that it then is required to
95 * run this function for all timeouts after the first one
96 * has happened -- the work that runs from this timer will
99 static void run_again(struct ieee80211_sub_if_data *sdata,
100 unsigned long timeout)
102 sdata_assert_lock(sdata);
104 if (!timer_pending(&sdata->u.mgd.timer) ||
105 time_before(timeout, sdata->u.mgd.timer.expires))
106 mod_timer(&sdata->u.mgd.timer, timeout);
109 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
111 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
114 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
117 mod_timer(&sdata->u.mgd.bcn_mon_timer,
118 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
121 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
123 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
125 if (unlikely(!sdata->u.mgd.associated))
128 ifmgd->probe_send_count = 0;
130 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133 mod_timer(&sdata->u.mgd.conn_mon_timer,
134 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
137 static int ecw2cw(int ecw)
139 return (1 << ecw) - 1;
143 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
144 struct ieee80211_supported_band *sband,
145 struct ieee80211_channel *channel,
146 const struct ieee80211_ht_cap *ht_cap,
147 const struct ieee80211_ht_operation *ht_oper,
148 const struct ieee80211_vht_operation *vht_oper,
149 struct cfg80211_chan_def *chandef, bool tracking)
151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
152 struct cfg80211_chan_def vht_chandef;
153 struct ieee80211_sta_ht_cap sta_ht_cap;
156 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
157 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
159 chandef->chan = channel;
160 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
161 chandef->center_freq1 = channel->center_freq;
162 chandef->center_freq2 = 0;
164 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
165 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
169 chandef->width = NL80211_CHAN_WIDTH_20;
171 if (!(ht_cap->cap_info &
172 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
173 ret = IEEE80211_STA_DISABLE_40MHZ;
174 vht_chandef = *chandef;
178 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
180 /* check that channel matches the right operating channel */
181 if (!tracking && channel->center_freq != ht_cfreq) {
183 * It's possible that some APs are confused here;
184 * Netgear WNDR3700 sometimes reports 4 higher than
185 * the actual channel in association responses, but
186 * since we look at probe response/beacon data here
190 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
191 channel->center_freq, ht_cfreq,
192 ht_oper->primary_chan, channel->band);
193 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
197 /* check 40 MHz support, if we have it */
198 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
199 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
200 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
201 chandef->width = NL80211_CHAN_WIDTH_40;
202 chandef->center_freq1 += 10;
204 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
205 chandef->width = NL80211_CHAN_WIDTH_40;
206 chandef->center_freq1 -= 10;
210 /* 40 MHz (and 80 MHz) must be supported for VHT */
211 ret = IEEE80211_STA_DISABLE_VHT;
212 /* also mark 40 MHz disabled */
213 ret |= IEEE80211_STA_DISABLE_40MHZ;
217 if (!vht_oper || !sband->vht_cap.vht_supported) {
218 ret = IEEE80211_STA_DISABLE_VHT;
222 vht_chandef.chan = channel;
223 vht_chandef.center_freq1 =
224 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
226 vht_chandef.center_freq2 = 0;
228 switch (vht_oper->chan_width) {
229 case IEEE80211_VHT_CHANWIDTH_USE_HT:
230 vht_chandef.width = chandef->width;
231 vht_chandef.center_freq1 = chandef->center_freq1;
233 case IEEE80211_VHT_CHANWIDTH_80MHZ:
234 vht_chandef.width = NL80211_CHAN_WIDTH_80;
236 case IEEE80211_VHT_CHANWIDTH_160MHZ:
237 vht_chandef.width = NL80211_CHAN_WIDTH_160;
239 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
240 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
241 vht_chandef.center_freq2 =
242 ieee80211_channel_to_frequency(
243 vht_oper->center_freq_seg2_idx,
247 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
249 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
250 vht_oper->chan_width);
251 ret = IEEE80211_STA_DISABLE_VHT;
255 if (!cfg80211_chandef_valid(&vht_chandef)) {
256 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
258 "AP VHT information is invalid, disable VHT\n");
259 ret = IEEE80211_STA_DISABLE_VHT;
263 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
268 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
269 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
271 "AP VHT information doesn't match HT, disable VHT\n");
272 ret = IEEE80211_STA_DISABLE_VHT;
276 *chandef = vht_chandef;
282 * When tracking the current AP, don't do any further checks if the
283 * new chandef is identical to the one we're currently using for the
284 * connection. This keeps us from playing ping-pong with regulatory,
285 * without it the following can happen (for example):
286 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
287 * - AP advertises regdom US
288 * - CRDA loads regdom US with 80 MHz prohibited (old database)
289 * - the code below detects an unsupported channel, downgrades, and
290 * we disconnect from the AP in the caller
291 * - disconnect causes CRDA to reload world regdomain and the game
293 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
295 * It seems possible that there are still scenarios with CSA or real
296 * bandwidth changes where a this could happen, but those cases are
297 * less common and wouldn't completely prevent using the AP.
300 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
303 /* don't print the message below for VHT mismatch if VHT is disabled */
304 if (ret & IEEE80211_STA_DISABLE_VHT)
305 vht_chandef = *chandef;
308 * Ignore the DISABLED flag when we're already connected and only
309 * tracking the APs beacon for bandwidth changes - otherwise we
310 * might get disconnected here if we connect to an AP, update our
311 * regulatory information based on the AP's country IE and the
312 * information we have is wrong/outdated and disables the channel
313 * that we're actually using for the connection to the AP.
315 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
317 IEEE80211_CHAN_DISABLED)) {
318 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
319 ret = IEEE80211_STA_DISABLE_HT |
320 IEEE80211_STA_DISABLE_VHT;
324 ret |= ieee80211_chandef_downgrade(chandef);
327 if (chandef->width != vht_chandef.width && !tracking)
329 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
331 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
335 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
336 struct sta_info *sta,
337 const struct ieee80211_ht_cap *ht_cap,
338 const struct ieee80211_ht_operation *ht_oper,
339 const struct ieee80211_vht_operation *vht_oper,
340 const u8 *bssid, u32 *changed)
342 struct ieee80211_local *local = sdata->local;
343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
344 struct ieee80211_supported_band *sband;
345 struct ieee80211_channel *chan;
346 struct cfg80211_chan_def chandef;
349 enum ieee80211_sta_rx_bandwidth new_sta_bw;
352 /* if HT was/is disabled, don't track any bandwidth changes */
353 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
356 /* don't check VHT if we associated as non-VHT station */
357 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
360 if (WARN_ON_ONCE(!sta))
364 * if bss configuration changed store the new one -
365 * this may be applicable even if channel is identical
367 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
368 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
369 *changed |= BSS_CHANGED_HT;
370 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
373 chan = sdata->vif.bss_conf.chandef.chan;
374 sband = local->hw.wiphy->bands[chan->band];
376 /* calculate new channel (type) based on HT/VHT operation IEs */
377 flags = ieee80211_determine_chantype(sdata, sband, chan,
378 ht_cap, ht_oper, vht_oper,
382 * Downgrade the new channel if we associated with restricted
383 * capabilities. For example, if we associated as a 20 MHz STA
384 * to a 40 MHz AP (due to regulatory, capabilities or config
385 * reasons) then switching to a 40 MHz channel now won't do us
386 * any good -- we couldn't use it with the AP.
388 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
389 chandef.width == NL80211_CHAN_WIDTH_80P80)
390 flags |= ieee80211_chandef_downgrade(&chandef);
391 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
392 chandef.width == NL80211_CHAN_WIDTH_160)
393 flags |= ieee80211_chandef_downgrade(&chandef);
394 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
395 chandef.width > NL80211_CHAN_WIDTH_20)
396 flags |= ieee80211_chandef_downgrade(&chandef);
398 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
402 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
403 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
404 chandef.center_freq1, chandef.center_freq2);
406 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
407 IEEE80211_STA_DISABLE_VHT |
408 IEEE80211_STA_DISABLE_40MHZ |
409 IEEE80211_STA_DISABLE_80P80MHZ |
410 IEEE80211_STA_DISABLE_160MHZ)) ||
411 !cfg80211_chandef_valid(&chandef)) {
413 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
418 switch (chandef.width) {
419 case NL80211_CHAN_WIDTH_20_NOHT:
420 case NL80211_CHAN_WIDTH_20:
421 new_sta_bw = IEEE80211_STA_RX_BW_20;
423 case NL80211_CHAN_WIDTH_40:
424 new_sta_bw = IEEE80211_STA_RX_BW_40;
426 case NL80211_CHAN_WIDTH_80:
427 new_sta_bw = IEEE80211_STA_RX_BW_80;
429 case NL80211_CHAN_WIDTH_80P80:
430 case NL80211_CHAN_WIDTH_160:
431 new_sta_bw = IEEE80211_STA_RX_BW_160;
437 if (new_sta_bw > sta->cur_max_bandwidth)
438 new_sta_bw = sta->cur_max_bandwidth;
440 if (new_sta_bw < sta->sta.bandwidth) {
441 sta->sta.bandwidth = new_sta_bw;
442 rate_control_rate_update(local, sband, sta,
443 IEEE80211_RC_BW_CHANGED);
446 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
449 "AP %pM changed bandwidth to incompatible one - disconnect\n",
454 if (new_sta_bw > sta->sta.bandwidth) {
455 sta->sta.bandwidth = new_sta_bw;
456 rate_control_rate_update(local, sband, sta,
457 IEEE80211_RC_BW_CHANGED);
463 /* frame sending functions */
465 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
466 struct sk_buff *skb, u8 ap_ht_param,
467 struct ieee80211_supported_band *sband,
468 struct ieee80211_channel *channel,
469 enum ieee80211_smps_mode smps)
472 u32 flags = channel->flags;
474 struct ieee80211_sta_ht_cap ht_cap;
476 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
478 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
479 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
481 /* determine capability flags */
484 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
485 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
486 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
487 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
488 cap &= ~IEEE80211_HT_CAP_SGI_40;
491 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
492 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
493 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
494 cap &= ~IEEE80211_HT_CAP_SGI_40;
500 * If 40 MHz was disabled associate as though we weren't
501 * capable of 40 MHz -- some broken APs will never fall
502 * back to trying to transmit in 20 MHz.
504 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
505 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
506 cap &= ~IEEE80211_HT_CAP_SGI_40;
509 /* set SM PS mode properly */
510 cap &= ~IEEE80211_HT_CAP_SM_PS;
512 case IEEE80211_SMPS_AUTOMATIC:
513 case IEEE80211_SMPS_NUM_MODES:
515 case IEEE80211_SMPS_OFF:
516 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
517 IEEE80211_HT_CAP_SM_PS_SHIFT;
519 case IEEE80211_SMPS_STATIC:
520 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
521 IEEE80211_HT_CAP_SM_PS_SHIFT;
523 case IEEE80211_SMPS_DYNAMIC:
524 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
525 IEEE80211_HT_CAP_SM_PS_SHIFT;
529 /* reserve and fill IE */
530 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
531 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
534 /* This function determines vht capability flags for the association
536 * Note - the function may set the owner of the MU-MIMO capability
538 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
540 struct ieee80211_supported_band *sband,
541 struct ieee80211_vht_cap *ap_vht_cap)
543 struct ieee80211_local *local = sdata->local;
546 struct ieee80211_sta_vht_cap vht_cap;
547 u32 mask, ap_bf_sts, our_bf_sts;
549 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
551 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
552 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
554 /* determine capability flags */
557 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
558 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
560 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
561 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
562 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
563 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
566 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
567 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
568 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
572 * Some APs apparently get confused if our capabilities are better
573 * than theirs, so restrict what we advertise in the assoc request.
575 if (!(ap_vht_cap->vht_cap_info &
576 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
577 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
578 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
579 else if (!(ap_vht_cap->vht_cap_info &
580 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
581 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
584 * If some other vif is using the MU-MIMO capablity we cannot associate
585 * using MU-MIMO - this will lead to contradictions in the group-id
587 * Ownership is defined since association request, in order to avoid
588 * simultaneous associations with MU-MIMO.
590 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
591 bool disable_mu_mimo = false;
592 struct ieee80211_sub_if_data *other;
594 list_for_each_entry_rcu(other, &local->interfaces, list) {
595 if (other->flags & IEEE80211_SDATA_MU_MIMO_OWNER) {
596 disable_mu_mimo = true;
601 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
603 sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER;
606 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
608 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
609 our_bf_sts = cap & mask;
611 if (ap_bf_sts < our_bf_sts) {
616 /* reserve and fill IE */
617 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
618 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
621 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
623 struct ieee80211_local *local = sdata->local;
624 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
625 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
627 struct ieee80211_mgmt *mgmt;
629 size_t offset = 0, noffset;
630 int i, count, rates_len, supp_rates_len, shift;
632 struct ieee80211_supported_band *sband;
633 struct ieee80211_chanctx_conf *chanctx_conf;
634 struct ieee80211_channel *chan;
635 u32 rate_flags, rates = 0;
637 sdata_assert_lock(sdata);
640 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
641 if (WARN_ON(!chanctx_conf)) {
645 chan = chanctx_conf->def.chan;
646 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
648 sband = local->hw.wiphy->bands[chan->band];
649 shift = ieee80211_vif_get_shift(&sdata->vif);
651 if (assoc_data->supp_rates_len) {
653 * Get all rates supported by the device and the AP as
654 * some APs don't like getting a superset of their rates
655 * in the association request (e.g. D-Link DAP 1353 in
658 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
659 assoc_data->supp_rates,
660 assoc_data->supp_rates_len,
664 * In case AP not provide any supported rates information
665 * before association, we send information element(s) with
666 * all rates that we support.
669 for (i = 0; i < sband->n_bitrates; i++) {
670 if ((rate_flags & sband->bitrates[i].flags)
678 skb = alloc_skb(local->hw.extra_tx_headroom +
679 sizeof(*mgmt) + /* bit too much but doesn't matter */
680 2 + assoc_data->ssid_len + /* SSID */
681 4 + rates_len + /* (extended) rates */
682 4 + /* power capability */
683 2 + 2 * sband->n_channels + /* supported channels */
684 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
685 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
686 assoc_data->ie_len + /* extra IEs */
692 skb_reserve(skb, local->hw.extra_tx_headroom);
694 capab = WLAN_CAPABILITY_ESS;
696 if (sband->band == IEEE80211_BAND_2GHZ) {
697 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
698 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
701 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
702 capab |= WLAN_CAPABILITY_PRIVACY;
704 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
705 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
706 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
708 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
709 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
711 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
713 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
714 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
715 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
717 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
719 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
720 IEEE80211_STYPE_REASSOC_REQ);
721 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
722 mgmt->u.reassoc_req.listen_interval =
723 cpu_to_le16(local->hw.conf.listen_interval);
724 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
728 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
729 IEEE80211_STYPE_ASSOC_REQ);
730 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
731 mgmt->u.assoc_req.listen_interval =
732 cpu_to_le16(local->hw.conf.listen_interval);
736 pos = skb_put(skb, 2 + assoc_data->ssid_len);
737 *pos++ = WLAN_EID_SSID;
738 *pos++ = assoc_data->ssid_len;
739 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
741 /* add all rates which were marked to be used above */
742 supp_rates_len = rates_len;
743 if (supp_rates_len > 8)
746 pos = skb_put(skb, supp_rates_len + 2);
747 *pos++ = WLAN_EID_SUPP_RATES;
748 *pos++ = supp_rates_len;
751 for (i = 0; i < sband->n_bitrates; i++) {
752 if (BIT(i) & rates) {
753 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
761 if (rates_len > count) {
762 pos = skb_put(skb, rates_len - count + 2);
763 *pos++ = WLAN_EID_EXT_SUPP_RATES;
764 *pos++ = rates_len - count;
766 for (i++; i < sband->n_bitrates; i++) {
767 if (BIT(i) & rates) {
769 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
776 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
777 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
778 pos = skb_put(skb, 4);
779 *pos++ = WLAN_EID_PWR_CAPABILITY;
781 *pos++ = 0; /* min tx power */
783 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
786 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
787 /* TODO: get this in reg domain format */
788 pos = skb_put(skb, 2 * sband->n_channels + 2);
789 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
790 *pos++ = 2 * sband->n_channels;
791 for (i = 0; i < sband->n_channels; i++) {
792 *pos++ = ieee80211_frequency_to_channel(
793 sband->channels[i].center_freq);
794 *pos++ = 1; /* one channel in the subband*/
798 /* if present, add any custom IEs that go before HT */
799 if (assoc_data->ie_len) {
800 static const u8 before_ht[] = {
803 WLAN_EID_EXT_SUPP_RATES,
804 WLAN_EID_PWR_CAPABILITY,
805 WLAN_EID_SUPPORTED_CHANNELS,
808 WLAN_EID_RRM_ENABLED_CAPABILITIES,
809 WLAN_EID_MOBILITY_DOMAIN,
810 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
811 WLAN_EID_RIC_DATA, /* reassoc only */
812 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
814 static const u8 after_ric[] = {
815 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
816 WLAN_EID_HT_CAPABILITY,
817 WLAN_EID_BSS_COEX_2040,
818 WLAN_EID_EXT_CAPABILITY,
819 WLAN_EID_QOS_TRAFFIC_CAPA,
820 WLAN_EID_TIM_BCAST_REQ,
821 WLAN_EID_INTERWORKING,
822 /* 60GHz doesn't happen right now */
823 WLAN_EID_VHT_CAPABILITY,
824 WLAN_EID_OPMODE_NOTIF,
827 noffset = ieee80211_ie_split_ric(assoc_data->ie,
830 ARRAY_SIZE(before_ht),
832 ARRAY_SIZE(after_ric),
834 pos = skb_put(skb, noffset - offset);
835 memcpy(pos, assoc_data->ie + offset, noffset - offset);
839 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
840 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
841 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
843 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
844 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
845 sband, chan, sdata->smps_mode);
847 /* if present, add any custom IEs that go before VHT */
848 if (assoc_data->ie_len) {
849 static const u8 before_vht[] = {
852 WLAN_EID_EXT_SUPP_RATES,
853 WLAN_EID_PWR_CAPABILITY,
854 WLAN_EID_SUPPORTED_CHANNELS,
857 WLAN_EID_RRM_ENABLED_CAPABILITIES,
858 WLAN_EID_MOBILITY_DOMAIN,
859 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
860 WLAN_EID_HT_CAPABILITY,
861 WLAN_EID_BSS_COEX_2040,
862 WLAN_EID_EXT_CAPABILITY,
863 WLAN_EID_QOS_TRAFFIC_CAPA,
864 WLAN_EID_TIM_BCAST_REQ,
865 WLAN_EID_INTERWORKING,
868 /* RIC already taken above, so no need to handle here anymore */
869 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
870 before_vht, ARRAY_SIZE(before_vht),
872 pos = skb_put(skb, noffset - offset);
873 memcpy(pos, assoc_data->ie + offset, noffset - offset);
877 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
878 ieee80211_add_vht_ie(sdata, skb, sband,
879 &assoc_data->ap_vht_cap);
881 /* if present, add any custom non-vendor IEs that go after HT */
882 if (assoc_data->ie_len) {
883 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
886 pos = skb_put(skb, noffset - offset);
887 memcpy(pos, assoc_data->ie + offset, noffset - offset);
891 if (assoc_data->wmm) {
892 if (assoc_data->uapsd) {
893 qos_info = ifmgd->uapsd_queues;
894 qos_info |= (ifmgd->uapsd_max_sp_len <<
895 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
900 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
903 /* add any remaining custom (i.e. vendor specific here) IEs */
904 if (assoc_data->ie_len) {
905 noffset = assoc_data->ie_len;
906 pos = skb_put(skb, noffset - offset);
907 memcpy(pos, assoc_data->ie + offset, noffset - offset);
910 drv_mgd_prepare_tx(local, sdata);
912 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
913 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
914 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
915 IEEE80211_TX_INTFL_MLME_CONN_TX;
916 ieee80211_tx_skb(sdata, skb);
919 void ieee80211_send_pspoll(struct ieee80211_local *local,
920 struct ieee80211_sub_if_data *sdata)
922 struct ieee80211_pspoll *pspoll;
925 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
929 pspoll = (struct ieee80211_pspoll *) skb->data;
930 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
933 ieee80211_tx_skb(sdata, skb);
936 void ieee80211_send_nullfunc(struct ieee80211_local *local,
937 struct ieee80211_sub_if_data *sdata,
941 struct ieee80211_hdr_3addr *nullfunc;
942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
944 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
948 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
950 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
952 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
953 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
955 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
956 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
958 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
959 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
961 ieee80211_tx_skb(sdata, skb);
964 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
965 struct ieee80211_sub_if_data *sdata)
968 struct ieee80211_hdr *nullfunc;
971 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
974 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
978 skb_reserve(skb, local->hw.extra_tx_headroom);
980 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
981 memset(nullfunc, 0, 30);
982 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
983 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
984 nullfunc->frame_control = fc;
985 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
986 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
987 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
988 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
990 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
991 ieee80211_tx_skb(sdata, skb);
994 /* spectrum management related things */
995 static void ieee80211_chswitch_work(struct work_struct *work)
997 struct ieee80211_sub_if_data *sdata =
998 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
999 struct ieee80211_local *local = sdata->local;
1000 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1003 if (!ieee80211_sdata_running(sdata))
1007 mutex_lock(&local->mtx);
1008 mutex_lock(&local->chanctx_mtx);
1010 if (!ifmgd->associated)
1013 if (!sdata->vif.csa_active)
1017 * using reservation isn't immediate as it may be deferred until later
1018 * with multi-vif. once reservation is complete it will re-schedule the
1019 * work with no reserved_chanctx so verify chandef to check if it
1020 * completed successfully
1023 if (sdata->reserved_chanctx) {
1024 struct ieee80211_supported_band *sband = NULL;
1025 struct sta_info *mgd_sta = NULL;
1026 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1029 * with multi-vif csa driver may call ieee80211_csa_finish()
1030 * many times while waiting for other interfaces to use their
1033 if (sdata->reserved_ready)
1036 if (sdata->vif.bss_conf.chandef.width !=
1037 sdata->csa_chandef.width) {
1039 * For managed interface, we need to also update the AP
1040 * station bandwidth and align the rate scale algorithm
1041 * on the bandwidth change. Here we only consider the
1042 * bandwidth of the new channel definition (as channel
1043 * switch flow does not have the full HT/VHT/HE
1044 * information), assuming that if additional changes are
1045 * required they would be done as part of the processing
1046 * of the next beacon from the AP.
1048 switch (sdata->csa_chandef.width) {
1049 case NL80211_CHAN_WIDTH_20_NOHT:
1050 case NL80211_CHAN_WIDTH_20:
1052 bw = IEEE80211_STA_RX_BW_20;
1054 case NL80211_CHAN_WIDTH_40:
1055 bw = IEEE80211_STA_RX_BW_40;
1057 case NL80211_CHAN_WIDTH_80:
1058 bw = IEEE80211_STA_RX_BW_80;
1060 case NL80211_CHAN_WIDTH_80P80:
1061 case NL80211_CHAN_WIDTH_160:
1062 bw = IEEE80211_STA_RX_BW_160;
1066 mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1068 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1071 if (sdata->vif.bss_conf.chandef.width >
1072 sdata->csa_chandef.width) {
1073 mgd_sta->sta.bandwidth = bw;
1074 rate_control_rate_update(local, sband, mgd_sta,
1075 IEEE80211_RC_BW_CHANGED);
1078 ret = ieee80211_vif_use_reserved_context(sdata);
1081 "failed to use reserved channel context, disconnecting (err=%d)\n",
1083 ieee80211_queue_work(&sdata->local->hw,
1084 &ifmgd->csa_connection_drop_work);
1088 if (sdata->vif.bss_conf.chandef.width <
1089 sdata->csa_chandef.width) {
1090 mgd_sta->sta.bandwidth = bw;
1091 rate_control_rate_update(local, sband, mgd_sta,
1092 IEEE80211_RC_BW_CHANGED);
1098 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1099 &sdata->csa_chandef)) {
1101 "failed to finalize channel switch, disconnecting\n");
1102 ieee80211_queue_work(&sdata->local->hw,
1103 &ifmgd->csa_connection_drop_work);
1107 ifmgd->csa_waiting_bcn = true;
1109 ieee80211_sta_reset_beacon_monitor(sdata);
1110 ieee80211_sta_reset_conn_monitor(sdata);
1113 mutex_unlock(&local->chanctx_mtx);
1114 mutex_unlock(&local->mtx);
1115 sdata_unlock(sdata);
1118 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1120 struct ieee80211_local *local = sdata->local;
1121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1124 sdata_assert_lock(sdata);
1126 WARN_ON(!sdata->vif.csa_active);
1128 if (sdata->csa_block_tx) {
1129 ieee80211_wake_vif_queues(local, sdata,
1130 IEEE80211_QUEUE_STOP_REASON_CSA);
1131 sdata->csa_block_tx = false;
1134 sdata->vif.csa_active = false;
1135 ifmgd->csa_waiting_bcn = false;
1137 * If the CSA IE is still present on the beacon after the switch,
1138 * we need to consider it as a new CSA (possibly to self).
1140 ifmgd->beacon_crc_valid = false;
1142 ret = drv_post_channel_switch(sdata);
1145 "driver post channel switch failed, disconnecting\n");
1146 ieee80211_queue_work(&local->hw,
1147 &ifmgd->csa_connection_drop_work);
1151 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1154 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1156 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1157 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1159 trace_api_chswitch_done(sdata, success);
1162 "driver channel switch failed, disconnecting\n");
1163 ieee80211_queue_work(&sdata->local->hw,
1164 &ifmgd->csa_connection_drop_work);
1166 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1169 EXPORT_SYMBOL(ieee80211_chswitch_done);
1171 static void ieee80211_chswitch_timer(unsigned long data)
1173 struct ieee80211_sub_if_data *sdata =
1174 (struct ieee80211_sub_if_data *) data;
1176 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1180 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1181 u64 timestamp, u32 device_timestamp,
1182 struct ieee802_11_elems *elems,
1185 struct ieee80211_local *local = sdata->local;
1186 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1187 struct cfg80211_bss *cbss = ifmgd->associated;
1188 struct ieee80211_chanctx_conf *conf;
1189 struct ieee80211_chanctx *chanctx;
1190 enum ieee80211_band current_band;
1191 struct ieee80211_csa_ie csa_ie;
1192 struct ieee80211_channel_switch ch_switch;
1195 sdata_assert_lock(sdata);
1200 if (local->scanning)
1203 /* disregard subsequent announcements if we are already processing */
1204 if (sdata->vif.csa_active)
1207 current_band = cbss->channel->band;
1208 memset(&csa_ie, 0, sizeof(csa_ie));
1209 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1211 ifmgd->associated->bssid, &csa_ie);
1213 ieee80211_queue_work(&local->hw,
1214 &ifmgd->csa_connection_drop_work);
1218 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1219 IEEE80211_CHAN_DISABLED)) {
1221 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1222 ifmgd->associated->bssid,
1223 csa_ie.chandef.chan->center_freq,
1224 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1225 csa_ie.chandef.center_freq2);
1226 ieee80211_queue_work(&local->hw,
1227 &ifmgd->csa_connection_drop_work);
1231 if (cfg80211_chandef_identical(&csa_ie.chandef,
1232 &sdata->vif.bss_conf.chandef)) {
1233 if (ifmgd->csa_ignored_same_chan)
1236 "AP %pM tries to chanswitch to same channel, ignore\n",
1237 ifmgd->associated->bssid);
1238 ifmgd->csa_ignored_same_chan = true;
1243 * Drop all TDLS peers - either we disconnect or move to a different
1244 * channel from this point on. There's no telling what our peer will do.
1245 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1246 * have an incompatible wider chandef.
1248 ieee80211_teardown_tdls_peers(sdata);
1250 mutex_lock(&local->mtx);
1251 mutex_lock(&local->chanctx_mtx);
1252 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1253 lockdep_is_held(&local->chanctx_mtx));
1256 "no channel context assigned to vif?, disconnecting\n");
1257 goto drop_connection;
1260 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1262 if (local->use_chanctx &&
1263 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1265 "driver doesn't support chan-switch with channel contexts\n");
1266 goto drop_connection;
1269 ch_switch.timestamp = timestamp;
1270 ch_switch.device_timestamp = device_timestamp;
1271 ch_switch.block_tx = csa_ie.mode;
1272 ch_switch.chandef = csa_ie.chandef;
1273 ch_switch.count = csa_ie.count;
1275 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1277 "preparing for channel switch failed, disconnecting\n");
1278 goto drop_connection;
1281 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1282 chanctx->mode, false);
1285 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1287 goto drop_connection;
1289 mutex_unlock(&local->chanctx_mtx);
1291 sdata->vif.csa_active = true;
1292 sdata->csa_chandef = csa_ie.chandef;
1293 sdata->csa_block_tx = csa_ie.mode;
1294 ifmgd->csa_ignored_same_chan = false;
1296 if (sdata->csa_block_tx)
1297 ieee80211_stop_vif_queues(local, sdata,
1298 IEEE80211_QUEUE_STOP_REASON_CSA);
1299 mutex_unlock(&local->mtx);
1301 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1304 if (local->ops->channel_switch) {
1305 /* use driver's channel switch callback */
1306 drv_channel_switch(local, sdata, &ch_switch);
1310 /* channel switch handled in software */
1311 if (csa_ie.count <= 1)
1312 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1314 mod_timer(&ifmgd->chswitch_timer,
1315 TU_TO_EXP_TIME((csa_ie.count - 1) *
1316 cbss->beacon_interval));
1319 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1320 mutex_unlock(&local->chanctx_mtx);
1321 mutex_unlock(&local->mtx);
1325 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1326 struct ieee80211_channel *channel,
1327 const u8 *country_ie, u8 country_ie_len,
1328 const u8 *pwr_constr_elem,
1329 int *chan_pwr, int *pwr_reduction)
1331 struct ieee80211_country_ie_triplet *triplet;
1332 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1333 int i, chan_increment;
1334 bool have_chan_pwr = false;
1337 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1340 triplet = (void *)(country_ie + 3);
1341 country_ie_len -= 3;
1343 switch (channel->band) {
1347 case IEEE80211_BAND_2GHZ:
1348 case IEEE80211_BAND_60GHZ:
1351 case IEEE80211_BAND_5GHZ:
1357 while (country_ie_len >= 3) {
1358 u8 first_channel = triplet->chans.first_channel;
1360 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1363 for (i = 0; i < triplet->chans.num_channels; i++) {
1364 if (first_channel + i * chan_increment == chan) {
1365 have_chan_pwr = true;
1366 *chan_pwr = triplet->chans.max_power;
1375 country_ie_len -= 3;
1378 if (have_chan_pwr && pwr_constr_elem)
1379 *pwr_reduction = *pwr_constr_elem;
1383 return have_chan_pwr;
1386 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1387 struct ieee80211_channel *channel,
1388 const u8 *cisco_dtpc_ie,
1391 /* From practical testing, the first data byte of the DTPC element
1392 * seems to contain the requested dBm level, and the CLI on Cisco
1393 * APs clearly state the range is -127 to 127 dBm, which indicates
1394 * a signed byte, although it seemingly never actually goes negative.
1395 * The other byte seems to always be zero.
1397 *pwr_level = (__s8)cisco_dtpc_ie[4];
1400 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1401 struct ieee80211_channel *channel,
1402 struct ieee80211_mgmt *mgmt,
1403 const u8 *country_ie, u8 country_ie_len,
1404 const u8 *pwr_constr_ie,
1405 const u8 *cisco_dtpc_ie)
1407 bool has_80211h_pwr = false, has_cisco_pwr = false;
1408 int chan_pwr = 0, pwr_reduction_80211h = 0;
1409 int pwr_level_cisco, pwr_level_80211h;
1411 __le16 capab = mgmt->u.probe_resp.capab_info;
1414 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1415 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1416 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1417 sdata, channel, country_ie, country_ie_len,
1418 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1420 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1423 if (cisco_dtpc_ie) {
1424 ieee80211_find_cisco_dtpc(
1425 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1426 has_cisco_pwr = true;
1429 if (!has_80211h_pwr && !has_cisco_pwr)
1432 /* If we have both 802.11h and Cisco DTPC, apply both limits
1433 * by picking the smallest of the two power levels advertised.
1435 if (has_80211h_pwr &&
1436 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1437 new_ap_level = pwr_level_80211h;
1439 if (sdata->ap_power_level == new_ap_level)
1443 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1444 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1445 sdata->u.mgd.bssid);
1446 } else { /* has_cisco_pwr is always true here. */
1447 new_ap_level = pwr_level_cisco;
1449 if (sdata->ap_power_level == new_ap_level)
1453 "Limiting TX power to %d dBm as advertised by %pM\n",
1454 pwr_level_cisco, sdata->u.mgd.bssid);
1457 sdata->ap_power_level = new_ap_level;
1458 if (__ieee80211_recalc_txpower(sdata))
1459 return BSS_CHANGED_TXPOWER;
1464 static void ieee80211_enable_ps(struct ieee80211_local *local,
1465 struct ieee80211_sub_if_data *sdata)
1467 struct ieee80211_conf *conf = &local->hw.conf;
1470 * If we are scanning right now then the parameters will
1471 * take effect when scan finishes.
1473 if (local->scanning)
1476 if (conf->dynamic_ps_timeout > 0 &&
1477 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1478 mod_timer(&local->dynamic_ps_timer, jiffies +
1479 msecs_to_jiffies(conf->dynamic_ps_timeout));
1481 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1482 ieee80211_send_nullfunc(local, sdata, true);
1484 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1485 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1488 conf->flags |= IEEE80211_CONF_PS;
1489 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1493 static void ieee80211_change_ps(struct ieee80211_local *local)
1495 struct ieee80211_conf *conf = &local->hw.conf;
1497 if (local->ps_sdata) {
1498 ieee80211_enable_ps(local, local->ps_sdata);
1499 } else if (conf->flags & IEEE80211_CONF_PS) {
1500 conf->flags &= ~IEEE80211_CONF_PS;
1501 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1502 del_timer_sync(&local->dynamic_ps_timer);
1503 cancel_work_sync(&local->dynamic_ps_enable_work);
1507 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1509 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1510 struct sta_info *sta = NULL;
1511 bool authorized = false;
1513 if (!mgd->powersave)
1519 if (!mgd->associated)
1522 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1525 if (!mgd->have_beacon)
1529 sta = sta_info_get(sdata, mgd->bssid);
1531 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1537 /* need to hold RTNL or interface lock */
1538 void ieee80211_recalc_ps(struct ieee80211_local *local)
1540 struct ieee80211_sub_if_data *sdata, *found = NULL;
1544 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1545 local->ps_sdata = NULL;
1549 list_for_each_entry(sdata, &local->interfaces, list) {
1550 if (!ieee80211_sdata_running(sdata))
1552 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1553 /* If an AP vif is found, then disable PS
1554 * by setting the count to zero thereby setting
1560 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1566 if (count == 1 && ieee80211_powersave_allowed(found)) {
1567 u8 dtimper = found->u.mgd.dtim_period;
1570 beaconint_us = ieee80211_tu_to_usec(
1571 found->vif.bss_conf.beacon_int);
1573 timeout = local->dynamic_ps_forced_timeout;
1576 local->hw.conf.dynamic_ps_timeout = timeout;
1578 /* If the TIM IE is invalid, pretend the value is 1 */
1582 local->hw.conf.ps_dtim_period = dtimper;
1583 local->ps_sdata = found;
1585 local->ps_sdata = NULL;
1588 ieee80211_change_ps(local);
1591 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1593 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1595 if (sdata->vif.bss_conf.ps != ps_allowed) {
1596 sdata->vif.bss_conf.ps = ps_allowed;
1597 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1601 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1603 struct ieee80211_local *local =
1604 container_of(work, struct ieee80211_local,
1605 dynamic_ps_disable_work);
1607 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1608 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1609 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1612 ieee80211_wake_queues_by_reason(&local->hw,
1613 IEEE80211_MAX_QUEUE_MAP,
1614 IEEE80211_QUEUE_STOP_REASON_PS,
1618 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1620 struct ieee80211_local *local =
1621 container_of(work, struct ieee80211_local,
1622 dynamic_ps_enable_work);
1623 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1624 struct ieee80211_if_managed *ifmgd;
1625 unsigned long flags;
1628 /* can only happen when PS was just disabled anyway */
1632 ifmgd = &sdata->u.mgd;
1634 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1637 if (local->hw.conf.dynamic_ps_timeout > 0) {
1638 /* don't enter PS if TX frames are pending */
1639 if (drv_tx_frames_pending(local)) {
1640 mod_timer(&local->dynamic_ps_timer, jiffies +
1642 local->hw.conf.dynamic_ps_timeout));
1647 * transmission can be stopped by others which leads to
1648 * dynamic_ps_timer expiry. Postpone the ps timer if it
1649 * is not the actual idle state.
1651 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1652 for (q = 0; q < local->hw.queues; q++) {
1653 if (local->queue_stop_reasons[q]) {
1654 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1656 mod_timer(&local->dynamic_ps_timer, jiffies +
1658 local->hw.conf.dynamic_ps_timeout));
1662 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1665 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1666 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1667 if (drv_tx_frames_pending(local)) {
1668 mod_timer(&local->dynamic_ps_timer, jiffies +
1670 local->hw.conf.dynamic_ps_timeout));
1672 ieee80211_send_nullfunc(local, sdata, true);
1673 /* Flush to get the tx status of nullfunc frame */
1674 ieee80211_flush_queues(local, sdata, false);
1678 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1679 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1680 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1681 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1682 local->hw.conf.flags |= IEEE80211_CONF_PS;
1683 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1687 void ieee80211_dynamic_ps_timer(unsigned long data)
1689 struct ieee80211_local *local = (void *) data;
1691 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1694 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1696 struct delayed_work *delayed_work =
1697 container_of(work, struct delayed_work, work);
1698 struct ieee80211_sub_if_data *sdata =
1699 container_of(delayed_work, struct ieee80211_sub_if_data,
1700 dfs_cac_timer_work);
1701 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1703 mutex_lock(&sdata->local->mtx);
1704 if (sdata->wdev.cac_started) {
1705 ieee80211_vif_release_channel(sdata);
1706 cfg80211_cac_event(sdata->dev, &chandef,
1707 NL80211_RADAR_CAC_FINISHED,
1710 mutex_unlock(&sdata->local->mtx);
1714 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1716 struct ieee80211_local *local = sdata->local;
1717 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1721 if (local->hw.queues < IEEE80211_NUM_ACS)
1724 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1725 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1727 unsigned long now = jiffies;
1729 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1730 tx_tspec->admitted_time &&
1731 time_after(now, tx_tspec->time_slice_start + HZ)) {
1732 tx_tspec->consumed_tx_time = 0;
1733 tx_tspec->time_slice_start = now;
1735 if (tx_tspec->downgraded)
1737 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1740 switch (tx_tspec->action) {
1741 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1742 /* take the original parameters */
1743 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1745 "failed to set TX queue parameters for queue %d\n",
1747 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1748 tx_tspec->downgraded = false;
1751 case TX_TSPEC_ACTION_DOWNGRADE:
1752 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1753 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1757 /* downgrade next lower non-ACM AC */
1758 for (non_acm_ac = ac + 1;
1759 non_acm_ac < IEEE80211_NUM_ACS;
1761 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1763 /* The loop will result in using BK even if it requires
1764 * admission control, such configuration makes no sense
1765 * and we have to transmit somehow - the AC selection
1766 * does the same thing.
1768 if (drv_conf_tx(local, sdata, ac,
1769 &sdata->tx_conf[non_acm_ac]))
1771 "failed to set TX queue parameters for queue %d\n",
1773 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1775 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1776 tx_tspec->time_slice_start + HZ - now + 1);
1778 case TX_TSPEC_ACTION_NONE:
1787 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1789 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1790 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1793 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1795 struct ieee80211_sub_if_data *sdata;
1797 sdata = container_of(work, struct ieee80211_sub_if_data,
1798 u.mgd.tx_tspec_wk.work);
1799 ieee80211_sta_handle_tspec_ac_params(sdata);
1803 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1804 struct ieee80211_sub_if_data *sdata,
1805 const u8 *wmm_param, size_t wmm_param_len)
1807 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1808 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1812 u8 uapsd_queues = 0;
1814 if (!local->ops->conf_tx)
1817 if (local->hw.queues < IEEE80211_NUM_ACS)
1823 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1826 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1827 uapsd_queues = ifmgd->uapsd_queues;
1829 count = wmm_param[6] & 0x0f;
1830 if (count == ifmgd->wmm_last_param_set)
1832 ifmgd->wmm_last_param_set = count;
1834 pos = wmm_param + 8;
1835 left = wmm_param_len - 8;
1837 memset(¶ms, 0, sizeof(params));
1840 for (; left >= 4; left -= 4, pos += 4) {
1841 int aci = (pos[0] >> 5) & 0x03;
1842 int acm = (pos[0] >> 4) & 0x01;
1847 ac = IEEE80211_AC_BK;
1849 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1850 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1854 ac = IEEE80211_AC_VI;
1856 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1857 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1861 ac = IEEE80211_AC_VO;
1863 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1864 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1869 ac = IEEE80211_AC_BE;
1871 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1872 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1877 params[ac].aifs = pos[0] & 0x0f;
1879 if (params[ac].aifs < 2) {
1881 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1882 params[ac].aifs, aci);
1883 params[ac].aifs = 2;
1885 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1886 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1887 params[ac].txop = get_unaligned_le16(pos + 2);
1888 params[ac].acm = acm;
1889 params[ac].uapsd = uapsd;
1891 if (params[ac].cw_min == 0 ||
1892 params[ac].cw_min > params[ac].cw_max) {
1894 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1895 params[ac].cw_min, params[ac].cw_max, aci);
1900 /* WMM specification requires all 4 ACIs. */
1901 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1902 if (params[ac].cw_min == 0) {
1904 "AP has invalid WMM params (missing AC %d), using defaults\n",
1910 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1912 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1914 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1915 params[ac].txop, params[ac].uapsd,
1916 ifmgd->tx_tspec[ac].downgraded);
1917 sdata->tx_conf[ac] = params[ac];
1918 if (!ifmgd->tx_tspec[ac].downgraded &&
1919 drv_conf_tx(local, sdata, ac, ¶ms[ac]))
1921 "failed to set TX queue parameters for AC %d\n",
1925 /* enable WMM or activate new settings */
1926 sdata->vif.bss_conf.qos = true;
1930 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1932 lockdep_assert_held(&sdata->local->mtx);
1934 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1935 ieee80211_run_deferred_scan(sdata->local);
1938 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1940 mutex_lock(&sdata->local->mtx);
1941 __ieee80211_stop_poll(sdata);
1942 mutex_unlock(&sdata->local->mtx);
1945 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1946 u16 capab, bool erp_valid, u8 erp)
1948 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1950 bool use_protection;
1951 bool use_short_preamble;
1952 bool use_short_slot;
1955 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1956 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1958 use_protection = false;
1959 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1962 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1963 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1964 use_short_slot = true;
1966 if (use_protection != bss_conf->use_cts_prot) {
1967 bss_conf->use_cts_prot = use_protection;
1968 changed |= BSS_CHANGED_ERP_CTS_PROT;
1971 if (use_short_preamble != bss_conf->use_short_preamble) {
1972 bss_conf->use_short_preamble = use_short_preamble;
1973 changed |= BSS_CHANGED_ERP_PREAMBLE;
1976 if (use_short_slot != bss_conf->use_short_slot) {
1977 bss_conf->use_short_slot = use_short_slot;
1978 changed |= BSS_CHANGED_ERP_SLOT;
1984 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1985 struct cfg80211_bss *cbss,
1986 u32 bss_info_changed)
1988 struct ieee80211_bss *bss = (void *)cbss->priv;
1989 struct ieee80211_local *local = sdata->local;
1990 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1992 bss_info_changed |= BSS_CHANGED_ASSOC;
1993 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1994 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1996 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1997 beacon_loss_count * bss_conf->beacon_int));
1999 sdata->u.mgd.associated = cbss;
2000 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2002 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2004 if (sdata->vif.p2p) {
2005 const struct cfg80211_bss_ies *ies;
2008 ies = rcu_dereference(cbss->ies);
2012 ret = cfg80211_get_p2p_attr(
2013 ies->data, ies->len,
2014 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2015 (u8 *) &bss_conf->p2p_noa_attr,
2016 sizeof(bss_conf->p2p_noa_attr));
2018 sdata->u.mgd.p2p_noa_index =
2019 bss_conf->p2p_noa_attr.index;
2020 bss_info_changed |= BSS_CHANGED_P2P_PS;
2026 /* just to be sure */
2027 ieee80211_stop_poll(sdata);
2029 ieee80211_led_assoc(local, 1);
2031 if (sdata->u.mgd.have_beacon) {
2033 * If the AP is buggy we may get here with no DTIM period
2034 * known, so assume it's 1 which is the only safe assumption
2035 * in that case, although if the TIM IE is broken powersave
2036 * probably just won't work at all.
2038 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2039 bss_conf->beacon_rate = bss->beacon_rate;
2040 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2042 bss_conf->beacon_rate = NULL;
2043 bss_conf->dtim_period = 0;
2046 bss_conf->assoc = 1;
2048 /* Tell the driver to monitor connection quality (if supported) */
2049 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2050 bss_conf->cqm_rssi_thold)
2051 bss_info_changed |= BSS_CHANGED_CQM;
2053 /* Enable ARP filtering */
2054 if (bss_conf->arp_addr_cnt)
2055 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2057 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2059 mutex_lock(&local->iflist_mtx);
2060 ieee80211_recalc_ps(local);
2061 mutex_unlock(&local->iflist_mtx);
2063 ieee80211_recalc_smps(sdata);
2064 ieee80211_recalc_ps_vif(sdata);
2066 netif_carrier_on(sdata->dev);
2069 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2070 u16 stype, u16 reason, bool tx,
2073 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2074 struct ieee80211_local *local = sdata->local;
2077 sdata_assert_lock(sdata);
2079 if (WARN_ON_ONCE(tx && !frame_buf))
2082 if (WARN_ON(!ifmgd->associated))
2085 ieee80211_stop_poll(sdata);
2087 ifmgd->associated = NULL;
2088 netif_carrier_off(sdata->dev);
2091 * if we want to get out of ps before disassoc (why?) we have
2092 * to do it before sending disassoc, as otherwise the null-packet
2095 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2096 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2097 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2099 local->ps_sdata = NULL;
2101 /* disable per-vif ps */
2102 ieee80211_recalc_ps_vif(sdata);
2104 /* make sure ongoing transmission finishes */
2108 * drop any frame before deauth/disassoc, this can be data or
2109 * management frame. Since we are disconnecting, we should not
2110 * insist sending these frames which can take time and delay
2111 * the disconnection and possible the roaming.
2114 ieee80211_flush_queues(local, sdata, true);
2116 /* deauthenticate/disassociate now */
2117 if (tx || frame_buf)
2118 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2119 reason, tx, frame_buf);
2121 /* flush out frame - make sure the deauth was actually sent */
2123 ieee80211_flush_queues(local, sdata, false);
2125 /* clear bssid only after building the needed mgmt frames */
2126 eth_zero_addr(ifmgd->bssid);
2128 /* remove AP and TDLS peers */
2129 sta_info_flush(sdata);
2131 /* finally reset all BSS / config parameters */
2132 changed |= ieee80211_reset_erp_info(sdata);
2134 ieee80211_led_assoc(local, 0);
2135 changed |= BSS_CHANGED_ASSOC;
2136 sdata->vif.bss_conf.assoc = false;
2138 ifmgd->p2p_noa_index = -1;
2139 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2140 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2142 /* on the next assoc, re-program HT/VHT parameters */
2143 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2144 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2145 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2146 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2147 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2149 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2151 del_timer_sync(&local->dynamic_ps_timer);
2152 cancel_work_sync(&local->dynamic_ps_enable_work);
2154 /* Disable ARP filtering */
2155 if (sdata->vif.bss_conf.arp_addr_cnt)
2156 changed |= BSS_CHANGED_ARP_FILTER;
2158 sdata->vif.bss_conf.qos = false;
2159 changed |= BSS_CHANGED_QOS;
2161 /* The BSSID (not really interesting) and HT changed */
2162 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2163 ieee80211_bss_info_change_notify(sdata, changed);
2165 /* disassociated - set to defaults now */
2166 ieee80211_set_wmm_default(sdata, false, false);
2168 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2169 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2170 del_timer_sync(&sdata->u.mgd.timer);
2171 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2173 sdata->vif.bss_conf.dtim_period = 0;
2174 sdata->vif.bss_conf.beacon_rate = NULL;
2176 ifmgd->have_beacon = false;
2179 mutex_lock(&local->mtx);
2180 ieee80211_vif_release_channel(sdata);
2182 sdata->vif.csa_active = false;
2183 ifmgd->csa_waiting_bcn = false;
2184 ifmgd->csa_ignored_same_chan = false;
2185 if (sdata->csa_block_tx) {
2186 ieee80211_wake_vif_queues(local, sdata,
2187 IEEE80211_QUEUE_STOP_REASON_CSA);
2188 sdata->csa_block_tx = false;
2190 mutex_unlock(&local->mtx);
2192 /* existing TX TSPEC sessions no longer exist */
2193 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2194 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2196 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2199 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2200 struct ieee80211_hdr *hdr)
2203 * We can postpone the mgd.timer whenever receiving unicast frames
2204 * from AP because we know that the connection is working both ways
2205 * at that time. But multicast frames (and hence also beacons) must
2206 * be ignored here, because we need to trigger the timer during
2207 * data idle periods for sending the periodic probe request to the
2208 * AP we're connected to.
2210 if (is_multicast_ether_addr(hdr->addr1))
2213 ieee80211_sta_reset_conn_monitor(sdata);
2216 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2219 struct ieee80211_local *local = sdata->local;
2221 mutex_lock(&local->mtx);
2222 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2225 __ieee80211_stop_poll(sdata);
2227 mutex_lock(&local->iflist_mtx);
2228 ieee80211_recalc_ps(local);
2229 mutex_unlock(&local->iflist_mtx);
2231 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2235 * We've received a probe response, but are not sure whether
2236 * we have or will be receiving any beacons or data, so let's
2237 * schedule the timers again, just in case.
2239 ieee80211_sta_reset_beacon_monitor(sdata);
2241 mod_timer(&ifmgd->conn_mon_timer,
2242 round_jiffies_up(jiffies +
2243 IEEE80211_CONNECTION_IDLE_TIME));
2245 mutex_unlock(&local->mtx);
2248 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2249 struct ieee80211_hdr *hdr,
2252 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2253 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2254 int ac = ieee80211_ac_from_tid(tid);
2255 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2256 unsigned long now = jiffies;
2258 if (likely(!tx_tspec->admitted_time))
2261 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2262 tx_tspec->consumed_tx_time = 0;
2263 tx_tspec->time_slice_start = now;
2265 if (tx_tspec->downgraded) {
2266 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2267 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2271 if (tx_tspec->downgraded)
2274 tx_tspec->consumed_tx_time += tx_time;
2276 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2277 tx_tspec->downgraded = true;
2278 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2279 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2283 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2284 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2286 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2288 if (!ieee80211_is_data(hdr->frame_control))
2291 if (ieee80211_is_any_nullfunc(hdr->frame_control) &&
2292 sdata->u.mgd.probe_send_count > 0) {
2294 ieee80211_sta_reset_conn_monitor(sdata);
2296 sdata->u.mgd.nullfunc_failed = true;
2297 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2302 ieee80211_sta_reset_conn_monitor(sdata);
2305 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2307 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2309 u8 *dst = ifmgd->associated->bssid;
2310 u8 unicast_limit = max(1, max_probe_tries - 3);
2313 * Try sending broadcast probe requests for the last three
2314 * probe requests after the first ones failed since some
2315 * buggy APs only support broadcast probe requests.
2317 if (ifmgd->probe_send_count >= unicast_limit)
2321 * When the hardware reports an accurate Tx ACK status, it's
2322 * better to send a nullfunc frame instead of a probe request,
2323 * as it will kick us off the AP quickly if we aren't associated
2324 * anymore. The timeout will be reset if the frame is ACKed by
2327 ifmgd->probe_send_count++;
2329 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2330 ifmgd->nullfunc_failed = false;
2331 ieee80211_send_nullfunc(sdata->local, sdata, false);
2336 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2337 if (WARN_ON_ONCE(ssid == NULL))
2342 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2343 ssid + 2, ssid_len, NULL,
2344 0, (u32) -1, true, 0,
2345 ifmgd->associated->channel, false);
2349 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2350 run_again(sdata, ifmgd->probe_timeout);
2353 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2356 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2357 bool already = false;
2359 if (!ieee80211_sdata_running(sdata))
2364 if (!ifmgd->associated)
2367 mutex_lock(&sdata->local->mtx);
2369 if (sdata->local->tmp_channel || sdata->local->scanning) {
2370 mutex_unlock(&sdata->local->mtx);
2375 mlme_dbg_ratelimited(sdata,
2376 "detected beacon loss from AP (missed %d beacons) - probing\n",
2379 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2383 * The driver/our work has already reported this event or the
2384 * connection monitoring has kicked in and we have already sent
2385 * a probe request. Or maybe the AP died and the driver keeps
2386 * reporting until we disassociate...
2388 * In either case we have to ignore the current call to this
2389 * function (except for setting the correct probe reason bit)
2390 * because otherwise we would reset the timer every time and
2391 * never check whether we received a probe response!
2393 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2396 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2398 mutex_unlock(&sdata->local->mtx);
2403 mutex_lock(&sdata->local->iflist_mtx);
2404 ieee80211_recalc_ps(sdata->local);
2405 mutex_unlock(&sdata->local->iflist_mtx);
2407 ifmgd->probe_send_count = 0;
2408 ieee80211_mgd_probe_ap_send(sdata);
2410 sdata_unlock(sdata);
2413 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2414 struct ieee80211_vif *vif)
2416 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2417 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2418 struct cfg80211_bss *cbss;
2419 struct sk_buff *skb;
2423 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2426 sdata_assert_lock(sdata);
2428 if (ifmgd->associated)
2429 cbss = ifmgd->associated;
2430 else if (ifmgd->auth_data)
2431 cbss = ifmgd->auth_data->bss;
2432 else if (ifmgd->assoc_data)
2433 cbss = ifmgd->assoc_data->bss;
2438 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2439 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN,
2440 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1))
2445 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2446 (u32) -1, cbss->channel,
2453 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2455 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2456 const u8 *buf, size_t len, bool tx,
2459 struct ieee80211_event event = {
2461 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2462 .u.mlme.reason = reason,
2466 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2468 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2470 drv_event_callback(sdata->local, sdata, &event);
2473 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2475 struct ieee80211_local *local = sdata->local;
2476 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2477 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2480 if (!ifmgd->associated) {
2481 sdata_unlock(sdata);
2485 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2486 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2488 mutex_lock(&local->mtx);
2489 sdata->vif.csa_active = false;
2490 ifmgd->csa_waiting_bcn = false;
2491 if (sdata->csa_block_tx) {
2492 ieee80211_wake_vif_queues(local, sdata,
2493 IEEE80211_QUEUE_STOP_REASON_CSA);
2494 sdata->csa_block_tx = false;
2496 mutex_unlock(&local->mtx);
2498 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2499 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2501 sdata_unlock(sdata);
2504 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2506 struct ieee80211_sub_if_data *sdata =
2507 container_of(work, struct ieee80211_sub_if_data,
2508 u.mgd.beacon_connection_loss_work);
2509 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2511 if (ifmgd->associated)
2512 ifmgd->beacon_loss_count++;
2514 if (ifmgd->connection_loss) {
2515 sdata_info(sdata, "Connection to AP %pM lost\n",
2517 __ieee80211_disconnect(sdata);
2519 ieee80211_mgd_probe_ap(sdata, true);
2523 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2525 struct ieee80211_sub_if_data *sdata =
2526 container_of(work, struct ieee80211_sub_if_data,
2527 u.mgd.csa_connection_drop_work);
2529 __ieee80211_disconnect(sdata);
2532 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2534 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2535 struct ieee80211_hw *hw = &sdata->local->hw;
2537 trace_api_beacon_loss(sdata);
2539 sdata->u.mgd.connection_loss = false;
2540 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2542 EXPORT_SYMBOL(ieee80211_beacon_loss);
2544 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2546 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2547 struct ieee80211_hw *hw = &sdata->local->hw;
2549 trace_api_connection_loss(sdata);
2551 sdata->u.mgd.connection_loss = true;
2552 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2554 EXPORT_SYMBOL(ieee80211_connection_loss);
2557 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2560 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2562 sdata_assert_lock(sdata);
2566 * we are not authenticated yet, the only timer that could be
2567 * running is the timeout for the authentication response which
2568 * which is not relevant anymore.
2570 del_timer_sync(&sdata->u.mgd.timer);
2571 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2573 eth_zero_addr(sdata->u.mgd.bssid);
2574 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2575 sdata->u.mgd.flags = 0;
2576 mutex_lock(&sdata->local->mtx);
2577 ieee80211_vif_release_channel(sdata);
2578 mutex_unlock(&sdata->local->mtx);
2581 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2583 sdata->u.mgd.auth_data = NULL;
2586 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2587 bool assoc, bool abandon)
2589 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2591 sdata_assert_lock(sdata);
2595 * we are not associated yet, the only timer that could be
2596 * running is the timeout for the association response which
2597 * which is not relevant anymore.
2599 del_timer_sync(&sdata->u.mgd.timer);
2600 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2602 eth_zero_addr(sdata->u.mgd.bssid);
2603 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2604 sdata->u.mgd.flags = 0;
2605 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2606 mutex_lock(&sdata->local->mtx);
2607 ieee80211_vif_release_channel(sdata);
2608 mutex_unlock(&sdata->local->mtx);
2611 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2615 sdata->u.mgd.assoc_data = NULL;
2618 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2619 struct ieee80211_mgmt *mgmt, size_t len)
2621 struct ieee80211_local *local = sdata->local;
2622 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2624 struct ieee802_11_elems elems;
2627 pos = mgmt->u.auth.variable;
2628 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2629 if (!elems.challenge)
2631 auth_data->expected_transaction = 4;
2632 drv_mgd_prepare_tx(sdata->local, sdata);
2633 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2634 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2635 IEEE80211_TX_INTFL_MLME_CONN_TX;
2636 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2637 elems.challenge - 2, elems.challenge_len + 2,
2638 auth_data->bss->bssid, auth_data->bss->bssid,
2639 auth_data->key, auth_data->key_len,
2640 auth_data->key_idx, tx_flags);
2643 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2644 struct ieee80211_mgmt *mgmt, size_t len)
2646 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2648 u16 auth_alg, auth_transaction, status_code;
2649 struct sta_info *sta;
2650 struct ieee80211_event event = {
2652 .u.mlme.data = AUTH_EVENT,
2655 sdata_assert_lock(sdata);
2660 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2663 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2665 if (!ether_addr_equal(bssid, mgmt->bssid))
2668 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2669 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2670 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2672 if (auth_alg != ifmgd->auth_data->algorithm ||
2673 auth_transaction != ifmgd->auth_data->expected_transaction) {
2674 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2675 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2677 ifmgd->auth_data->expected_transaction);
2681 if (status_code != WLAN_STATUS_SUCCESS) {
2682 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2683 mgmt->sa, status_code);
2684 ieee80211_destroy_auth_data(sdata, false);
2685 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2686 event.u.mlme.status = MLME_DENIED;
2687 event.u.mlme.reason = status_code;
2688 drv_event_callback(sdata->local, sdata, &event);
2692 switch (ifmgd->auth_data->algorithm) {
2693 case WLAN_AUTH_OPEN:
2694 case WLAN_AUTH_LEAP:
2698 case WLAN_AUTH_SHARED_KEY:
2699 if (ifmgd->auth_data->expected_transaction != 4) {
2700 ieee80211_auth_challenge(sdata, mgmt, len);
2701 /* need another frame */
2706 WARN_ONCE(1, "invalid auth alg %d",
2707 ifmgd->auth_data->algorithm);
2711 event.u.mlme.status = MLME_SUCCESS;
2712 drv_event_callback(sdata->local, sdata, &event);
2713 sdata_info(sdata, "authenticated\n");
2714 ifmgd->auth_data->done = true;
2715 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2716 ifmgd->auth_data->timeout_started = true;
2717 run_again(sdata, ifmgd->auth_data->timeout);
2719 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2720 ifmgd->auth_data->expected_transaction != 2) {
2722 * Report auth frame to user space for processing since another
2723 * round of Authentication frames is still needed.
2725 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2729 /* move station state to auth */
2730 mutex_lock(&sdata->local->sta_mtx);
2731 sta = sta_info_get(sdata, bssid);
2733 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2736 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2737 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2740 mutex_unlock(&sdata->local->sta_mtx);
2742 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2745 mutex_unlock(&sdata->local->sta_mtx);
2746 /* ignore frame -- wait for timeout */
2749 #define case_WLAN(type) \
2750 case WLAN_REASON_##type: return #type
2752 const char *ieee80211_get_reason_code_string(u16 reason_code)
2754 switch (reason_code) {
2755 case_WLAN(UNSPECIFIED);
2756 case_WLAN(PREV_AUTH_NOT_VALID);
2757 case_WLAN(DEAUTH_LEAVING);
2758 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2759 case_WLAN(DISASSOC_AP_BUSY);
2760 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2761 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2762 case_WLAN(DISASSOC_STA_HAS_LEFT);
2763 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2764 case_WLAN(DISASSOC_BAD_POWER);
2765 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2766 case_WLAN(INVALID_IE);
2767 case_WLAN(MIC_FAILURE);
2768 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2769 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2770 case_WLAN(IE_DIFFERENT);
2771 case_WLAN(INVALID_GROUP_CIPHER);
2772 case_WLAN(INVALID_PAIRWISE_CIPHER);
2773 case_WLAN(INVALID_AKMP);
2774 case_WLAN(UNSUPP_RSN_VERSION);
2775 case_WLAN(INVALID_RSN_IE_CAP);
2776 case_WLAN(IEEE8021X_FAILED);
2777 case_WLAN(CIPHER_SUITE_REJECTED);
2778 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2779 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2780 case_WLAN(DISASSOC_LOW_ACK);
2781 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2782 case_WLAN(QSTA_LEAVE_QBSS);
2783 case_WLAN(QSTA_NOT_USE);
2784 case_WLAN(QSTA_REQUIRE_SETUP);
2785 case_WLAN(QSTA_TIMEOUT);
2786 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2787 case_WLAN(MESH_PEER_CANCELED);
2788 case_WLAN(MESH_MAX_PEERS);
2789 case_WLAN(MESH_CONFIG);
2790 case_WLAN(MESH_CLOSE);
2791 case_WLAN(MESH_MAX_RETRIES);
2792 case_WLAN(MESH_CONFIRM_TIMEOUT);
2793 case_WLAN(MESH_INVALID_GTK);
2794 case_WLAN(MESH_INCONSISTENT_PARAM);
2795 case_WLAN(MESH_INVALID_SECURITY);
2796 case_WLAN(MESH_PATH_ERROR);
2797 case_WLAN(MESH_PATH_NOFORWARD);
2798 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2799 case_WLAN(MAC_EXISTS_IN_MBSS);
2800 case_WLAN(MESH_CHAN_REGULATORY);
2801 case_WLAN(MESH_CHAN);
2802 default: return "<unknown>";
2806 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2807 struct ieee80211_mgmt *mgmt, size_t len)
2809 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2810 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2812 sdata_assert_lock(sdata);
2817 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
2818 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
2822 if (ifmgd->associated &&
2823 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2824 const u8 *bssid = ifmgd->associated->bssid;
2826 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2828 ieee80211_get_reason_code_string(reason_code));
2830 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2832 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2837 if (ifmgd->assoc_data &&
2838 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2839 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2842 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2844 ieee80211_get_reason_code_string(reason_code));
2846 ieee80211_destroy_assoc_data(sdata, false, true);
2848 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2854 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2855 struct ieee80211_mgmt *mgmt, size_t len)
2857 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2860 sdata_assert_lock(sdata);
2865 if (!ifmgd->associated ||
2866 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2869 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2871 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
2872 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
2876 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2877 mgmt->sa, reason_code,
2878 ieee80211_get_reason_code_string(reason_code));
2880 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2882 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2885 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2886 u8 *supp_rates, unsigned int supp_rates_len,
2887 u32 *rates, u32 *basic_rates,
2888 bool *have_higher_than_11mbit,
2889 int *min_rate, int *min_rate_index,
2890 int shift, u32 rate_flags)
2894 for (i = 0; i < supp_rates_len; i++) {
2895 int rate = supp_rates[i] & 0x7f;
2896 bool is_basic = !!(supp_rates[i] & 0x80);
2898 if ((rate * 5 * (1 << shift)) > 110)
2899 *have_higher_than_11mbit = true;
2902 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2903 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2905 * Note: Even through the membership selector and the basic
2906 * rate flag share the same bit, they are not exactly
2909 if (!!(supp_rates[i] & 0x80) &&
2910 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2913 for (j = 0; j < sband->n_bitrates; j++) {
2914 struct ieee80211_rate *br;
2917 br = &sband->bitrates[j];
2918 if ((rate_flags & br->flags) != rate_flags)
2921 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2922 if (brate == rate) {
2925 *basic_rates |= BIT(j);
2926 if ((rate * 5) < *min_rate) {
2927 *min_rate = rate * 5;
2928 *min_rate_index = j;
2936 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2937 struct cfg80211_bss *cbss,
2938 struct ieee80211_mgmt *mgmt, size_t len)
2940 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2941 struct ieee80211_local *local = sdata->local;
2942 struct ieee80211_supported_band *sband;
2943 struct sta_info *sta;
2945 u16 capab_info, aid;
2946 struct ieee802_11_elems elems;
2947 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2948 const struct cfg80211_bss_ies *bss_ies = NULL;
2949 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2954 /* AssocResp and ReassocResp have identical structure */
2956 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2957 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2959 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2960 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2962 aid &= ~(BIT(15) | BIT(14));
2964 ifmgd->broken_ap = false;
2966 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2967 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2970 ifmgd->broken_ap = true;
2973 pos = mgmt->u.assoc_resp.variable;
2974 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2976 if (!elems.supp_rates) {
2977 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2982 ifmgd->tdls_chan_switch_prohibited =
2983 elems.ext_capab && elems.ext_capab_len >= 5 &&
2984 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2987 * Some APs are erroneously not including some information in their
2988 * (re)association response frames. Try to recover by using the data
2989 * from the beacon or probe response. This seems to afflict mobile
2990 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2991 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2993 if ((assoc_data->wmm && !elems.wmm_param) ||
2994 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2995 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2996 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2997 (!elems.vht_cap_elem || !elems.vht_operation))) {
2998 const struct cfg80211_bss_ies *ies;
2999 struct ieee802_11_elems bss_elems;
3002 ies = rcu_dereference(cbss->ies);
3004 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3010 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3012 if (assoc_data->wmm &&
3013 !elems.wmm_param && bss_elems.wmm_param) {
3014 elems.wmm_param = bss_elems.wmm_param;
3016 "AP bug: WMM param missing from AssocResp\n");
3020 * Also check if we requested HT/VHT, otherwise the AP doesn't
3021 * have to include the IEs in the (re)association response.
3023 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3024 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3025 elems.ht_cap_elem = bss_elems.ht_cap_elem;
3027 "AP bug: HT capability missing from AssocResp\n");
3029 if (!elems.ht_operation && bss_elems.ht_operation &&
3030 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3031 elems.ht_operation = bss_elems.ht_operation;
3033 "AP bug: HT operation missing from AssocResp\n");
3035 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3036 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3037 elems.vht_cap_elem = bss_elems.vht_cap_elem;
3039 "AP bug: VHT capa missing from AssocResp\n");
3041 if (!elems.vht_operation && bss_elems.vht_operation &&
3042 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3043 elems.vht_operation = bss_elems.vht_operation;
3045 "AP bug: VHT operation missing from AssocResp\n");
3050 * We previously checked these in the beacon/probe response, so
3051 * they should be present here. This is just a safety net.
3053 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3054 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3056 "HT AP is missing WMM params or HT capability/operation\n");
3061 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3062 (!elems.vht_cap_elem || !elems.vht_operation)) {
3064 "VHT AP is missing VHT capability/operation\n");
3069 mutex_lock(&sdata->local->sta_mtx);
3071 * station info was already allocated and inserted before
3072 * the association and should be available to us
3074 sta = sta_info_get(sdata, cbss->bssid);
3075 if (WARN_ON(!sta)) {
3076 mutex_unlock(&sdata->local->sta_mtx);
3081 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
3083 /* Set up internal HT/VHT capabilities */
3084 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3085 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3086 elems.ht_cap_elem, sta);
3088 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3089 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3090 elems.vht_cap_elem, sta);
3093 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3094 * in their association response, so ignore that data for our own
3095 * configuration. If it changed since the last beacon, we'll get the
3096 * next beacon and update then.
3100 * If an operating mode notification IE is present, override the
3101 * NSS calculation (that would be done in rate_control_rate_init())
3102 * and use the # of streams from that element.
3104 if (elems.opmode_notif &&
3105 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3108 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3109 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3111 sta->sta.rx_nss = nss;
3114 rate_control_rate_init(sta);
3116 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3117 set_sta_flag(sta, WLAN_STA_MFP);
3118 sta->sta.mfp = true;
3120 sta->sta.mfp = false;
3123 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3125 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3126 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3127 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3130 "failed to move station %pM to desired state\n",
3132 WARN_ON(__sta_info_destroy(sta));
3133 mutex_unlock(&sdata->local->sta_mtx);
3138 mutex_unlock(&sdata->local->sta_mtx);
3141 * Always handle WMM once after association regardless
3142 * of the first value the AP uses. Setting -1 here has
3143 * that effect because the AP values is an unsigned
3146 ifmgd->wmm_last_param_set = -1;
3148 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3149 ieee80211_set_wmm_default(sdata, false, false);
3150 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3151 elems.wmm_param_len)) {
3152 /* still enable QoS since we might have HT/VHT */
3153 ieee80211_set_wmm_default(sdata, false, true);
3154 /* set the disable-WMM flag in this case to disable
3155 * tracking WMM parameter changes in the beacon if
3156 * the parameters weren't actually valid. Doing so
3157 * avoids changing parameters very strangely when
3158 * the AP is going back and forth between valid and
3159 * invalid parameters.
3161 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3163 changed |= BSS_CHANGED_QOS;
3165 /* set AID and assoc capability,
3166 * ieee80211_set_associated() will tell the driver */
3167 bss_conf->aid = aid;
3168 bss_conf->assoc_capability = capab_info;
3169 ieee80211_set_associated(sdata, cbss, changed);
3172 * If we're using 4-addr mode, let the AP know that we're
3173 * doing so, so that it can create the STA VLAN on its side
3175 if (ifmgd->use_4addr)
3176 ieee80211_send_4addr_nullfunc(local, sdata);
3179 * Start timer to probe the connection to the AP now.
3180 * Also start the timer that will detect beacon loss.
3182 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3183 ieee80211_sta_reset_beacon_monitor(sdata);
3191 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3192 struct ieee80211_mgmt *mgmt,
3195 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3196 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3197 u16 capab_info, status_code, aid;
3198 struct ieee802_11_elems elems;
3199 int ac, uapsd_queues = -1;
3202 struct cfg80211_bss *bss;
3203 struct ieee80211_event event = {
3205 .u.mlme.data = ASSOC_EVENT,
3208 sdata_assert_lock(sdata);
3212 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3216 * AssocResp and ReassocResp have identical structure, so process both
3217 * of them in this function.
3223 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3224 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3225 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3226 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3229 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3230 reassoc ? "Rea" : "A", mgmt->sa,
3231 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3233 pos = mgmt->u.assoc_resp.variable;
3234 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3236 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3237 elems.timeout_int &&
3238 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3240 tu = le32_to_cpu(elems.timeout_int->value);
3241 ms = tu * 1024 / 1000;
3243 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3245 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3246 assoc_data->timeout_started = true;
3247 if (ms > IEEE80211_ASSOC_TIMEOUT)
3248 run_again(sdata, assoc_data->timeout);
3252 bss = assoc_data->bss;
3254 if (status_code != WLAN_STATUS_SUCCESS) {
3255 sdata_info(sdata, "%pM denied association (code=%d)\n",
3256 mgmt->sa, status_code);
3257 ieee80211_destroy_assoc_data(sdata, false, false);
3258 event.u.mlme.status = MLME_DENIED;
3259 event.u.mlme.reason = status_code;
3260 drv_event_callback(sdata->local, sdata, &event);
3262 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3263 /* oops -- internal error -- send timeout for now */
3264 ieee80211_destroy_assoc_data(sdata, false, false);
3265 cfg80211_assoc_timeout(sdata->dev, bss);
3268 event.u.mlme.status = MLME_SUCCESS;
3269 drv_event_callback(sdata->local, sdata, &event);
3270 sdata_info(sdata, "associated\n");
3273 * destroy assoc_data afterwards, as otherwise an idle
3274 * recalc after assoc_data is NULL but before associated
3275 * is set can cause the interface to go idle
3277 ieee80211_destroy_assoc_data(sdata, true, false);
3279 /* get uapsd queues configuration */
3281 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3282 if (sdata->tx_conf[ac].uapsd)
3283 uapsd_queues |= BIT(ac);
3286 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3289 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3290 struct ieee80211_mgmt *mgmt, size_t len,
3291 struct ieee80211_rx_status *rx_status,
3292 struct ieee802_11_elems *elems)
3294 struct ieee80211_local *local = sdata->local;
3295 struct ieee80211_bss *bss;
3296 struct ieee80211_channel *channel;
3298 sdata_assert_lock(sdata);
3300 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3304 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3307 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3308 ieee80211_rx_bss_put(local, bss);
3313 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3314 struct sk_buff *skb)
3316 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3317 struct ieee80211_if_managed *ifmgd;
3318 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3319 size_t baselen, len = skb->len;
3320 struct ieee802_11_elems elems;
3322 ifmgd = &sdata->u.mgd;
3324 sdata_assert_lock(sdata);
3326 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3327 return; /* ignore ProbeResp to foreign address */
3329 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3333 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3336 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3338 if (ifmgd->associated &&
3339 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3340 ieee80211_reset_ap_probe(sdata);
3344 * This is the canonical list of information elements we care about,
3345 * the filter code also gives us all changes to the Microsoft OUI
3346 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3347 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3348 * changes to requested client power.
3350 * We implement beacon filtering in software since that means we can
3351 * avoid processing the frame here and in cfg80211, and userspace
3352 * will not be able to tell whether the hardware supports it or not.
3354 * XXX: This list needs to be dynamic -- userspace needs to be able to
3355 * add items it requires. It also needs to be able to tell us to
3356 * look out for other vendor IEs.
3358 static const u64 care_about_ies =
3359 (1ULL << WLAN_EID_COUNTRY) |
3360 (1ULL << WLAN_EID_ERP_INFO) |
3361 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3362 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3363 (1ULL << WLAN_EID_HT_CAPABILITY) |
3364 (1ULL << WLAN_EID_HT_OPERATION) |
3365 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3367 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3368 struct ieee80211_mgmt *mgmt, size_t len,
3369 struct ieee80211_rx_status *rx_status)
3371 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3372 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3374 struct ieee802_11_elems elems;
3375 struct ieee80211_local *local = sdata->local;
3376 struct ieee80211_chanctx_conf *chanctx_conf;
3377 struct ieee80211_channel *chan;
3378 struct sta_info *sta;
3384 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3386 sdata_assert_lock(sdata);
3388 /* Process beacon from the current BSS */
3389 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3394 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3395 if (!chanctx_conf) {
3400 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3404 chan = chanctx_conf->def.chan;
3407 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3408 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3409 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3410 len - baselen, false, &elems);
3412 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3413 if (elems.tim && !elems.parse_error) {
3414 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3415 ifmgd->dtim_period = tim_ie->dtim_period;
3417 ifmgd->have_beacon = true;
3418 ifmgd->assoc_data->need_beacon = false;
3419 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3420 sdata->vif.bss_conf.sync_tsf =
3421 le64_to_cpu(mgmt->u.beacon.timestamp);
3422 sdata->vif.bss_conf.sync_device_ts =
3423 rx_status->device_timestamp;
3425 sdata->vif.bss_conf.sync_dtim_count =
3426 elems.tim->dtim_count;
3428 sdata->vif.bss_conf.sync_dtim_count = 0;
3430 /* continue assoc process */
3431 ifmgd->assoc_data->timeout = jiffies;
3432 ifmgd->assoc_data->timeout_started = true;
3433 run_again(sdata, ifmgd->assoc_data->timeout);
3437 if (!ifmgd->associated ||
3438 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3440 bssid = ifmgd->associated->bssid;
3442 /* Track average RSSI from the Beacon frames of the current AP */
3443 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3444 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3445 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3446 ifmgd->last_cqm_event_signal = 0;
3447 ifmgd->count_beacon_signal = 1;
3448 ifmgd->last_ave_beacon_signal = 0;
3450 ifmgd->count_beacon_signal++;
3453 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3455 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3456 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3457 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3458 int last_sig = ifmgd->last_ave_beacon_signal;
3459 struct ieee80211_event event = {
3464 * if signal crosses either of the boundaries, invoke callback
3465 * with appropriate parameters
3467 if (sig > ifmgd->rssi_max_thold &&
3468 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3469 ifmgd->last_ave_beacon_signal = sig;
3470 event.u.rssi.data = RSSI_EVENT_HIGH;
3471 drv_event_callback(local, sdata, &event);
3472 } else if (sig < ifmgd->rssi_min_thold &&
3473 (last_sig >= ifmgd->rssi_max_thold ||
3475 ifmgd->last_ave_beacon_signal = sig;
3476 event.u.rssi.data = RSSI_EVENT_LOW;
3477 drv_event_callback(local, sdata, &event);
3481 if (bss_conf->cqm_rssi_thold &&
3482 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3483 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3484 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3485 int last_event = ifmgd->last_cqm_event_signal;
3486 int thold = bss_conf->cqm_rssi_thold;
3487 int hyst = bss_conf->cqm_rssi_hyst;
3490 (last_event == 0 || sig < last_event - hyst)) {
3491 ifmgd->last_cqm_event_signal = sig;
3492 ieee80211_cqm_rssi_notify(
3494 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3496 } else if (sig > thold &&
3497 (last_event == 0 || sig > last_event + hyst)) {
3498 ifmgd->last_cqm_event_signal = sig;
3499 ieee80211_cqm_rssi_notify(
3501 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3506 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3507 mlme_dbg_ratelimited(sdata,
3508 "cancelling AP probe due to a received beacon\n");
3509 ieee80211_reset_ap_probe(sdata);
3513 * Push the beacon loss detection into the future since
3514 * we are processing a beacon from the AP just now.
3516 ieee80211_sta_reset_beacon_monitor(sdata);
3518 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3519 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3520 len - baselen, false, &elems,
3521 care_about_ies, ncrc);
3523 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3524 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3525 if (local->hw.conf.dynamic_ps_timeout > 0) {
3526 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3527 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3528 ieee80211_hw_config(local,
3529 IEEE80211_CONF_CHANGE_PS);
3531 ieee80211_send_nullfunc(local, sdata, false);
3532 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3533 local->pspolling = true;
3536 * Here is assumed that the driver will be
3537 * able to send ps-poll frame and receive a
3538 * response even though power save mode is
3539 * enabled, but some drivers might require
3540 * to disable power save here. This needs
3541 * to be investigated.
3543 ieee80211_send_pspoll(local, sdata);
3547 if (sdata->vif.p2p) {
3548 struct ieee80211_p2p_noa_attr noa = {};
3551 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3553 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3554 (u8 *) &noa, sizeof(noa));
3556 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3557 /* valid noa_attr and index changed */
3558 sdata->u.mgd.p2p_noa_index = noa.index;
3559 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3560 changed |= BSS_CHANGED_P2P_PS;
3562 * make sure we update all information, the CRC
3563 * mechanism doesn't look at P2P attributes.
3565 ifmgd->beacon_crc_valid = false;
3567 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3568 /* noa_attr not found and we had valid noa_attr before */
3569 sdata->u.mgd.p2p_noa_index = -1;
3570 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3571 changed |= BSS_CHANGED_P2P_PS;
3572 ifmgd->beacon_crc_valid = false;
3576 if (ifmgd->csa_waiting_bcn)
3577 ieee80211_chswitch_post_beacon(sdata);
3580 * Update beacon timing and dtim count on every beacon appearance. This
3581 * will allow the driver to use the most updated values. Do it before
3582 * comparing this one with last received beacon.
3583 * IMPORTANT: These parameters would possibly be out of sync by the time
3584 * the driver will use them. The synchronized view is currently
3585 * guaranteed only in certain callbacks.
3587 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3588 sdata->vif.bss_conf.sync_tsf =
3589 le64_to_cpu(mgmt->u.beacon.timestamp);
3590 sdata->vif.bss_conf.sync_device_ts =
3591 rx_status->device_timestamp;
3593 sdata->vif.bss_conf.sync_dtim_count =
3594 elems.tim->dtim_count;
3596 sdata->vif.bss_conf.sync_dtim_count = 0;
3599 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3601 ifmgd->beacon_crc = ncrc;
3602 ifmgd->beacon_crc_valid = true;
3604 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3606 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3607 rx_status->device_timestamp,
3610 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3611 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3612 elems.wmm_param_len))
3613 changed |= BSS_CHANGED_QOS;
3616 * If we haven't had a beacon before, tell the driver about the
3617 * DTIM period (and beacon timing if desired) now.
3619 if (!ifmgd->have_beacon) {
3620 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3622 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3624 bss_conf->dtim_period = 1;
3626 changed |= BSS_CHANGED_BEACON_INFO;
3627 ifmgd->have_beacon = true;
3629 mutex_lock(&local->iflist_mtx);
3630 ieee80211_recalc_ps(local);
3631 mutex_unlock(&local->iflist_mtx);
3633 ieee80211_recalc_ps_vif(sdata);
3636 if (elems.erp_info) {
3638 erp_value = elems.erp_info[0];
3642 changed |= ieee80211_handle_bss_capability(sdata,
3643 le16_to_cpu(mgmt->u.beacon.capab_info),
3644 erp_valid, erp_value);
3646 mutex_lock(&local->sta_mtx);
3647 sta = sta_info_get(sdata, bssid);
3649 if (ieee80211_config_bw(sdata, sta,
3650 elems.ht_cap_elem, elems.ht_operation,
3651 elems.vht_operation, bssid, &changed)) {
3652 mutex_unlock(&local->sta_mtx);
3653 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3654 WLAN_REASON_DEAUTH_LEAVING,
3656 ieee80211_report_disconnect(sdata, deauth_buf,
3657 sizeof(deauth_buf), true,
3658 WLAN_REASON_DEAUTH_LEAVING);
3662 if (sta && elems.opmode_notif)
3663 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3665 mutex_unlock(&local->sta_mtx);
3667 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3669 elems.country_elem_len,
3670 elems.pwr_constr_elem,
3671 elems.cisco_dtpc_elem);
3673 ieee80211_bss_info_change_notify(sdata, changed);
3676 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3677 struct sk_buff *skb)
3679 struct ieee80211_rx_status *rx_status;
3680 struct ieee80211_mgmt *mgmt;
3682 struct ieee802_11_elems elems;
3685 rx_status = (struct ieee80211_rx_status *) skb->cb;
3686 mgmt = (struct ieee80211_mgmt *) skb->data;
3687 fc = le16_to_cpu(mgmt->frame_control);
3691 switch (fc & IEEE80211_FCTL_STYPE) {
3692 case IEEE80211_STYPE_BEACON:
3693 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3695 case IEEE80211_STYPE_PROBE_RESP:
3696 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3698 case IEEE80211_STYPE_AUTH:
3699 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3701 case IEEE80211_STYPE_DEAUTH:
3702 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3704 case IEEE80211_STYPE_DISASSOC:
3705 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3707 case IEEE80211_STYPE_ASSOC_RESP:
3708 case IEEE80211_STYPE_REASSOC_RESP:
3709 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3711 case IEEE80211_STYPE_ACTION:
3712 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3713 ies_len = skb->len -
3714 offsetof(struct ieee80211_mgmt,
3715 u.action.u.chan_switch.variable);
3720 ieee802_11_parse_elems(
3721 mgmt->u.action.u.chan_switch.variable,
3722 ies_len, true, &elems);
3724 if (elems.parse_error)
3727 ieee80211_sta_process_chanswitch(sdata,
3729 rx_status->device_timestamp,
3731 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3732 ies_len = skb->len -
3733 offsetof(struct ieee80211_mgmt,
3734 u.action.u.ext_chan_switch.variable);
3739 ieee802_11_parse_elems(
3740 mgmt->u.action.u.ext_chan_switch.variable,
3741 ies_len, true, &elems);
3743 if (elems.parse_error)
3746 /* for the handling code pretend this was also an IE */
3747 elems.ext_chansw_ie =
3748 &mgmt->u.action.u.ext_chan_switch.data;
3750 ieee80211_sta_process_chanswitch(sdata,
3752 rx_status->device_timestamp,
3757 sdata_unlock(sdata);
3760 static void ieee80211_sta_timer(unsigned long data)
3762 struct ieee80211_sub_if_data *sdata =
3763 (struct ieee80211_sub_if_data *) data;
3765 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3768 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3769 u8 *bssid, u8 reason, bool tx)
3771 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3773 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3776 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3780 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3782 struct ieee80211_local *local = sdata->local;
3783 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3784 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3789 sdata_assert_lock(sdata);
3791 if (WARN_ON_ONCE(!auth_data))
3796 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3797 sdata_info(sdata, "authentication with %pM timed out\n",
3798 auth_data->bss->bssid);
3801 * Most likely AP is not in the range so remove the
3802 * bss struct for that AP.
3804 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3809 drv_mgd_prepare_tx(local, sdata);
3811 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3812 auth_data->bss->bssid, auth_data->tries,
3813 IEEE80211_AUTH_MAX_TRIES);
3815 auth_data->expected_transaction = 2;
3817 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3818 trans = auth_data->sae_trans;
3819 status = auth_data->sae_status;
3820 auth_data->expected_transaction = trans;
3823 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3824 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3825 IEEE80211_TX_INTFL_MLME_CONN_TX;
3827 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3828 auth_data->data, auth_data->data_len,
3829 auth_data->bss->bssid,
3830 auth_data->bss->bssid, NULL, 0, 0,
3833 if (tx_flags == 0) {
3834 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3835 auth_data->timeout_started = true;
3836 run_again(sdata, auth_data->timeout);
3838 auth_data->timeout =
3839 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3840 auth_data->timeout_started = true;
3841 run_again(sdata, auth_data->timeout);
3847 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3849 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3850 struct ieee80211_local *local = sdata->local;
3852 sdata_assert_lock(sdata);
3854 assoc_data->tries++;
3855 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3856 sdata_info(sdata, "association with %pM timed out\n",
3857 assoc_data->bss->bssid);
3860 * Most likely AP is not in the range so remove the
3861 * bss struct for that AP.
3863 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3868 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3869 assoc_data->bss->bssid, assoc_data->tries,
3870 IEEE80211_ASSOC_MAX_TRIES);
3871 ieee80211_send_assoc(sdata);
3873 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3874 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3875 assoc_data->timeout_started = true;
3876 run_again(sdata, assoc_data->timeout);
3878 assoc_data->timeout =
3879 round_jiffies_up(jiffies +
3880 IEEE80211_ASSOC_TIMEOUT_LONG);
3881 assoc_data->timeout_started = true;
3882 run_again(sdata, assoc_data->timeout);
3888 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3889 __le16 fc, bool acked)
3891 struct ieee80211_local *local = sdata->local;
3893 sdata->u.mgd.status_fc = fc;
3894 sdata->u.mgd.status_acked = acked;
3895 sdata->u.mgd.status_received = true;
3897 ieee80211_queue_work(&local->hw, &sdata->work);
3900 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3902 struct ieee80211_local *local = sdata->local;
3903 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3907 if (ifmgd->status_received) {
3908 __le16 fc = ifmgd->status_fc;
3909 bool status_acked = ifmgd->status_acked;
3911 ifmgd->status_received = false;
3912 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3914 ifmgd->auth_data->timeout =
3915 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3916 run_again(sdata, ifmgd->auth_data->timeout);
3918 ifmgd->auth_data->timeout = jiffies - 1;
3920 ifmgd->auth_data->timeout_started = true;
3921 } else if (ifmgd->assoc_data &&
3922 (ieee80211_is_assoc_req(fc) ||
3923 ieee80211_is_reassoc_req(fc))) {
3925 ifmgd->assoc_data->timeout =
3926 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3927 run_again(sdata, ifmgd->assoc_data->timeout);
3929 ifmgd->assoc_data->timeout = jiffies - 1;
3931 ifmgd->assoc_data->timeout_started = true;
3935 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3936 time_after(jiffies, ifmgd->auth_data->timeout)) {
3937 if (ifmgd->auth_data->done) {
3939 * ok ... we waited for assoc but userspace didn't,
3940 * so let's just kill the auth data
3942 ieee80211_destroy_auth_data(sdata, false);
3943 } else if (ieee80211_auth(sdata)) {
3945 struct ieee80211_event event = {
3947 .u.mlme.data = AUTH_EVENT,
3948 .u.mlme.status = MLME_TIMEOUT,
3951 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3953 ieee80211_destroy_auth_data(sdata, false);
3955 cfg80211_auth_timeout(sdata->dev, bssid);
3956 drv_event_callback(sdata->local, sdata, &event);
3958 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3959 run_again(sdata, ifmgd->auth_data->timeout);
3961 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3962 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3963 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3964 ieee80211_do_assoc(sdata)) {
3965 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3966 struct ieee80211_event event = {
3968 .u.mlme.data = ASSOC_EVENT,
3969 .u.mlme.status = MLME_TIMEOUT,
3972 ieee80211_destroy_assoc_data(sdata, false, false);
3973 cfg80211_assoc_timeout(sdata->dev, bss);
3974 drv_event_callback(sdata->local, sdata, &event);
3976 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3977 run_again(sdata, ifmgd->assoc_data->timeout);
3979 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3980 ifmgd->associated) {
3984 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3986 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3987 max_tries = max_nullfunc_tries;
3989 max_tries = max_probe_tries;
3991 /* ACK received for nullfunc probing frame */
3992 if (!ifmgd->probe_send_count)
3993 ieee80211_reset_ap_probe(sdata);
3994 else if (ifmgd->nullfunc_failed) {
3995 if (ifmgd->probe_send_count < max_tries) {
3997 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3998 bssid, ifmgd->probe_send_count,
4000 ieee80211_mgd_probe_ap_send(sdata);
4003 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4005 ieee80211_sta_connection_lost(sdata, bssid,
4006 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4009 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4010 run_again(sdata, ifmgd->probe_timeout);
4011 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4013 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4014 bssid, probe_wait_ms);
4015 ieee80211_sta_connection_lost(sdata, bssid,
4016 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4017 } else if (ifmgd->probe_send_count < max_tries) {
4019 "No probe response from AP %pM after %dms, try %d/%i\n",
4020 bssid, probe_wait_ms,
4021 ifmgd->probe_send_count, max_tries);
4022 ieee80211_mgd_probe_ap_send(sdata);
4025 * We actually lost the connection ... or did we?
4028 wiphy_debug(local->hw.wiphy,
4029 "%s: No probe response from AP %pM"
4030 " after %dms, disconnecting.\n",
4032 bssid, probe_wait_ms);
4034 ieee80211_sta_connection_lost(sdata, bssid,
4035 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4039 sdata_unlock(sdata);
4042 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4044 struct ieee80211_sub_if_data *sdata =
4045 (struct ieee80211_sub_if_data *) data;
4046 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4048 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4051 sdata->u.mgd.connection_loss = false;
4052 ieee80211_queue_work(&sdata->local->hw,
4053 &sdata->u.mgd.beacon_connection_loss_work);
4056 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4058 struct ieee80211_sub_if_data *sdata =
4059 (struct ieee80211_sub_if_data *) data;
4060 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4061 struct ieee80211_local *local = sdata->local;
4063 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4066 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4069 static void ieee80211_sta_monitor_work(struct work_struct *work)
4071 struct ieee80211_sub_if_data *sdata =
4072 container_of(work, struct ieee80211_sub_if_data,
4073 u.mgd.monitor_work);
4075 ieee80211_mgd_probe_ap(sdata, false);
4078 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4080 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4081 __ieee80211_stop_poll(sdata);
4083 /* let's probe the connection once */
4084 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4085 ieee80211_queue_work(&sdata->local->hw,
4086 &sdata->u.mgd.monitor_work);
4091 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4093 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4094 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4098 if (ifmgd->auth_data || ifmgd->assoc_data) {
4099 const u8 *bssid = ifmgd->auth_data ?
4100 ifmgd->auth_data->bss->bssid :
4101 ifmgd->assoc_data->bss->bssid;
4104 * If we are trying to authenticate / associate while suspending,
4105 * cfg80211 won't know and won't actually abort those attempts,
4106 * thus we need to do that ourselves.
4108 ieee80211_send_deauth_disassoc(sdata, bssid,
4109 IEEE80211_STYPE_DEAUTH,
4110 WLAN_REASON_DEAUTH_LEAVING,
4112 if (ifmgd->assoc_data)
4113 ieee80211_destroy_assoc_data(sdata, false, true);
4114 if (ifmgd->auth_data)
4115 ieee80211_destroy_auth_data(sdata, false);
4116 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4117 IEEE80211_DEAUTH_FRAME_LEN);
4120 /* This is a bit of a hack - we should find a better and more generic
4121 * solution to this. Normally when suspending, cfg80211 will in fact
4122 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4123 * auth (not so important) or assoc (this is the problem) process.
4125 * As a consequence, it can happen that we are in the process of both
4126 * associating and suspending, and receive an association response
4127 * after cfg80211 has checked if it needs to disconnect, but before
4128 * we actually set the flag to drop incoming frames. This will then
4129 * cause the workqueue flush to process the association response in
4130 * the suspend, resulting in a successful association just before it
4131 * tries to remove the interface from the driver, which now though
4132 * has a channel context assigned ... this results in issues.
4134 * To work around this (for now) simply deauth here again if we're
4137 if (ifmgd->associated && !sdata->local->wowlan) {
4139 struct cfg80211_deauth_request req = {
4140 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4144 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4145 ieee80211_mgd_deauth(sdata, &req);
4148 sdata_unlock(sdata);
4151 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4156 if (!ifmgd->associated) {
4157 sdata_unlock(sdata);
4161 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4162 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4163 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4164 ieee80211_sta_connection_lost(sdata,
4165 ifmgd->associated->bssid,
4166 WLAN_REASON_UNSPECIFIED,
4168 sdata_unlock(sdata);
4171 sdata_unlock(sdata);
4175 /* interface setup */
4176 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4178 struct ieee80211_if_managed *ifmgd;
4180 ifmgd = &sdata->u.mgd;
4181 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4182 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4183 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4184 ieee80211_beacon_connection_loss_work);
4185 INIT_WORK(&ifmgd->csa_connection_drop_work,
4186 ieee80211_csa_connection_drop_work);
4187 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4188 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4189 ieee80211_tdls_peer_del_work);
4190 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4191 (unsigned long) sdata);
4192 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4193 (unsigned long) sdata);
4194 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4195 (unsigned long) sdata);
4196 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4197 (unsigned long) sdata);
4198 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4199 ieee80211_sta_handle_tspec_ac_params_wk);
4202 ifmgd->powersave = sdata->wdev.ps;
4203 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4204 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4205 ifmgd->p2p_noa_index = -1;
4207 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4208 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4210 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4212 /* Setup TDLS data */
4213 spin_lock_init(&ifmgd->teardown_lock);
4214 ifmgd->teardown_skb = NULL;
4215 ifmgd->orig_teardown_skb = NULL;
4218 /* scan finished notification */
4219 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4221 struct ieee80211_sub_if_data *sdata;
4223 /* Restart STA timers */
4225 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4226 if (ieee80211_sdata_running(sdata))
4227 ieee80211_restart_sta_timer(sdata);
4232 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4233 struct cfg80211_bss *cbss)
4235 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4236 const u8 *ht_cap_ie, *vht_cap_ie;
4237 const struct ieee80211_ht_cap *ht_cap;
4238 const struct ieee80211_vht_cap *vht_cap;
4241 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4244 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4245 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4246 ht_cap = (void *)(ht_cap_ie + 2);
4247 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4249 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4250 * "Tx Unequal Modulation Supported" fields.
4254 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4257 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4258 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4262 vht_cap = (void *)(vht_cap_ie + 2);
4263 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4264 for (nss = 8; nss > 0; nss--) {
4265 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4266 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4269 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4270 chains = max(chains, nss);
4276 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4277 struct cfg80211_bss *cbss)
4279 struct ieee80211_local *local = sdata->local;
4280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4281 const struct ieee80211_ht_cap *ht_cap = NULL;
4282 const struct ieee80211_ht_operation *ht_oper = NULL;
4283 const struct ieee80211_vht_operation *vht_oper = NULL;
4284 struct ieee80211_supported_band *sband;
4285 struct cfg80211_chan_def chandef;
4290 sband = local->hw.wiphy->bands[cbss->channel->band];
4292 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4293 IEEE80211_STA_DISABLE_80P80MHZ |
4294 IEEE80211_STA_DISABLE_160MHZ);
4298 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4299 sband->ht_cap.ht_supported) {
4300 const u8 *ht_oper_ie, *ht_cap_ie;
4302 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4303 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4304 ht_oper = (void *)(ht_oper_ie + 2);
4306 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4307 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4308 ht_cap = (void *)(ht_cap_ie + 2);
4311 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4316 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4317 sband->vht_cap.vht_supported) {
4318 const u8 *vht_oper_ie, *vht_cap;
4320 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4321 WLAN_EID_VHT_OPERATION);
4322 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4323 vht_oper = (void *)(vht_oper_ie + 2);
4324 if (vht_oper && !ht_oper) {
4327 "AP advertised VHT without HT, disabling both\n");
4328 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4329 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4332 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4333 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4334 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4339 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4341 for (i = 0; i < sband->n_channels; i++) {
4342 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4343 IEEE80211_CHAN_NO_80MHZ))
4351 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4353 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4355 ht_cap, ht_oper, vht_oper,
4358 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4363 /* will change later if needed */
4364 sdata->smps_mode = IEEE80211_SMPS_OFF;
4366 mutex_lock(&local->mtx);
4368 * If this fails (possibly due to channel context sharing
4369 * on incompatible channels, e.g. 80+80 and 160 sharing the
4370 * same control channel) try to use a smaller bandwidth.
4372 ret = ieee80211_vif_use_channel(sdata, &chandef,
4373 IEEE80211_CHANCTX_SHARED);
4375 /* don't downgrade for 5 and 10 MHz channels, though. */
4376 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4377 chandef.width == NL80211_CHAN_WIDTH_10)
4380 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4381 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4382 ret = ieee80211_vif_use_channel(sdata, &chandef,
4383 IEEE80211_CHANCTX_SHARED);
4386 mutex_unlock(&local->mtx);
4390 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4391 struct cfg80211_bss *cbss, bool assoc,
4394 struct ieee80211_local *local = sdata->local;
4395 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4396 struct ieee80211_bss *bss = (void *)cbss->priv;
4397 struct sta_info *new_sta = NULL;
4398 struct ieee80211_supported_band *sband;
4399 bool have_sta = false;
4402 sband = local->hw.wiphy->bands[cbss->channel->band];
4404 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4407 /* If a reconfig is happening, bail out */
4408 if (local->in_reconfig)
4413 have_sta = sta_info_get(sdata, cbss->bssid);
4418 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4423 if (new_sta || override) {
4424 err = ieee80211_prep_channel(sdata, cbss);
4427 sta_info_free(local, new_sta);
4433 u32 rates = 0, basic_rates = 0;
4434 bool have_higher_than_11mbit;
4435 int min_rate = INT_MAX, min_rate_index = -1;
4436 struct ieee80211_chanctx_conf *chanctx_conf;
4437 const struct cfg80211_bss_ies *ies;
4438 int shift = ieee80211_vif_get_shift(&sdata->vif);
4442 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4443 if (WARN_ON(!chanctx_conf)) {
4445 sta_info_free(local, new_sta);
4448 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4451 ieee80211_get_rates(sband, bss->supp_rates,
4452 bss->supp_rates_len,
4453 &rates, &basic_rates,
4454 &have_higher_than_11mbit,
4455 &min_rate, &min_rate_index,
4459 * This used to be a workaround for basic rates missing
4460 * in the association response frame. Now that we no
4461 * longer use the basic rates from there, it probably
4462 * doesn't happen any more, but keep the workaround so
4463 * in case some *other* APs are buggy in different ways
4464 * we can connect -- with a warning.
4466 if (!basic_rates && min_rate_index >= 0) {
4468 "No basic rates, using min rate instead\n");
4469 basic_rates = BIT(min_rate_index);
4472 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4473 sdata->vif.bss_conf.basic_rates = basic_rates;
4475 /* cf. IEEE 802.11 9.2.12 */
4476 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4477 have_higher_than_11mbit)
4478 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4480 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4482 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4484 /* set timing information */
4485 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4487 ies = rcu_dereference(cbss->beacon_ies);
4491 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4492 sdata->vif.bss_conf.sync_device_ts =
4493 bss->device_ts_beacon;
4494 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4495 ies->data, ies->len);
4496 if (tim_ie && tim_ie[1] >= 2)
4497 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4499 sdata->vif.bss_conf.sync_dtim_count = 0;
4500 } else if (!ieee80211_hw_check(&sdata->local->hw,
4501 TIMING_BEACON_ONLY)) {
4502 ies = rcu_dereference(cbss->proberesp_ies);
4503 /* must be non-NULL since beacon IEs were NULL */
4504 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4505 sdata->vif.bss_conf.sync_device_ts =
4506 bss->device_ts_presp;
4507 sdata->vif.bss_conf.sync_dtim_count = 0;
4509 sdata->vif.bss_conf.sync_tsf = 0;
4510 sdata->vif.bss_conf.sync_device_ts = 0;
4511 sdata->vif.bss_conf.sync_dtim_count = 0;
4515 /* tell driver about BSSID, basic rates and timing */
4516 ieee80211_bss_info_change_notify(sdata,
4517 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4518 BSS_CHANGED_BEACON_INT);
4521 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4523 err = sta_info_insert(new_sta);
4527 "failed to insert STA entry for the AP (error %d)\n",
4532 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4534 /* Cancel scan to ensure that nothing interferes with connection */
4535 if (local->scanning)
4536 ieee80211_scan_cancel(local);
4542 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4543 struct cfg80211_auth_request *req)
4545 struct ieee80211_local *local = sdata->local;
4546 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4547 struct ieee80211_mgd_auth_data *auth_data;
4551 /* prepare auth data structure */
4553 switch (req->auth_type) {
4554 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4555 auth_alg = WLAN_AUTH_OPEN;
4557 case NL80211_AUTHTYPE_SHARED_KEY:
4558 if (IS_ERR(local->wep_tx_tfm))
4560 auth_alg = WLAN_AUTH_SHARED_KEY;
4562 case NL80211_AUTHTYPE_FT:
4563 auth_alg = WLAN_AUTH_FT;
4565 case NL80211_AUTHTYPE_NETWORK_EAP:
4566 auth_alg = WLAN_AUTH_LEAP;
4568 case NL80211_AUTHTYPE_SAE:
4569 auth_alg = WLAN_AUTH_SAE;
4575 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4576 req->ie_len, GFP_KERNEL);
4580 auth_data->bss = req->bss;
4582 if (req->sae_data_len >= 4) {
4583 __le16 *pos = (__le16 *) req->sae_data;
4584 auth_data->sae_trans = le16_to_cpu(pos[0]);
4585 auth_data->sae_status = le16_to_cpu(pos[1]);
4586 memcpy(auth_data->data, req->sae_data + 4,
4587 req->sae_data_len - 4);
4588 auth_data->data_len += req->sae_data_len - 4;
4591 if (req->ie && req->ie_len) {
4592 memcpy(&auth_data->data[auth_data->data_len],
4593 req->ie, req->ie_len);
4594 auth_data->data_len += req->ie_len;
4597 if (req->key && req->key_len) {
4598 auth_data->key_len = req->key_len;
4599 auth_data->key_idx = req->key_idx;
4600 memcpy(auth_data->key, req->key, req->key_len);
4603 auth_data->algorithm = auth_alg;
4605 /* try to authenticate/probe */
4607 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4608 ifmgd->assoc_data) {
4613 if (ifmgd->auth_data)
4614 ieee80211_destroy_auth_data(sdata, false);
4616 /* prep auth_data so we don't go into idle on disassoc */
4617 ifmgd->auth_data = auth_data;
4619 if (ifmgd->associated) {
4620 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4622 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4623 WLAN_REASON_UNSPECIFIED,
4626 ieee80211_report_disconnect(sdata, frame_buf,
4627 sizeof(frame_buf), true,
4628 WLAN_REASON_UNSPECIFIED);
4631 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4633 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4637 err = ieee80211_auth(sdata);
4639 sta_info_destroy_addr(sdata, req->bss->bssid);
4643 /* hold our own reference */
4644 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4648 eth_zero_addr(ifmgd->bssid);
4649 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4650 ifmgd->auth_data = NULL;
4651 mutex_lock(&sdata->local->mtx);
4652 ieee80211_vif_release_channel(sdata);
4653 mutex_unlock(&sdata->local->mtx);
4659 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4660 struct cfg80211_assoc_request *req)
4662 struct ieee80211_local *local = sdata->local;
4663 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4664 struct ieee80211_bss *bss = (void *)req->bss->priv;
4665 struct ieee80211_mgd_assoc_data *assoc_data;
4666 const struct cfg80211_bss_ies *beacon_ies;
4667 struct ieee80211_supported_band *sband;
4668 const u8 *ssidie, *ht_ie, *vht_ie;
4670 bool override = false;
4672 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4677 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4678 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) {
4683 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4684 assoc_data->ssid_len = ssidie[1];
4687 if (ifmgd->associated) {
4688 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4690 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4691 WLAN_REASON_UNSPECIFIED,
4694 ieee80211_report_disconnect(sdata, frame_buf,
4695 sizeof(frame_buf), true,
4696 WLAN_REASON_UNSPECIFIED);
4699 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4704 if (ifmgd->assoc_data) {
4709 if (ifmgd->auth_data) {
4712 /* keep sta info, bssid if matching */
4713 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4714 ieee80211_destroy_auth_data(sdata, match);
4717 /* prepare assoc data */
4719 ifmgd->beacon_crc_valid = false;
4721 assoc_data->wmm = bss->wmm_used &&
4722 (local->hw.queues >= IEEE80211_NUM_ACS);
4725 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4726 * We still associate in non-HT mode (11a/b/g) if any one of these
4727 * ciphers is configured as pairwise.
4728 * We can set this to true for non-11n hardware, that'll be checked
4729 * separately along with the peer capabilities.
4731 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4732 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4733 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4734 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4735 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4736 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4737 netdev_info(sdata->dev,
4738 "disabling HT/VHT due to WEP/TKIP use\n");
4742 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4743 sband = local->hw.wiphy->bands[req->bss->channel->band];
4744 if (!sband->ht_cap.ht_supported ||
4745 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4746 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4747 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4748 if (!bss->wmm_used &&
4749 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4750 netdev_info(sdata->dev,
4751 "disabling HT as WMM/QoS is not supported by the AP\n");
4754 /* disable VHT if we don't support it or the AP doesn't use WMM */
4755 if (!sband->vht_cap.vht_supported ||
4756 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4757 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4758 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4759 if (!bss->wmm_used &&
4760 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4761 netdev_info(sdata->dev,
4762 "disabling VHT as WMM/QoS is not supported by the AP\n");
4765 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4766 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4767 sizeof(ifmgd->ht_capa_mask));
4769 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4770 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4771 sizeof(ifmgd->vht_capa_mask));
4773 if (req->ie && req->ie_len) {
4774 memcpy(assoc_data->ie, req->ie, req->ie_len);
4775 assoc_data->ie_len = req->ie_len;
4778 assoc_data->bss = req->bss;
4780 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4781 if (ifmgd->powersave)
4782 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4784 sdata->smps_mode = IEEE80211_SMPS_OFF;
4786 sdata->smps_mode = ifmgd->req_smps;
4788 assoc_data->capability = req->bss->capability;
4789 assoc_data->supp_rates = bss->supp_rates;
4790 assoc_data->supp_rates_len = bss->supp_rates_len;
4793 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4794 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4795 assoc_data->ap_ht_param =
4796 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4798 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4799 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4800 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4801 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4802 sizeof(struct ieee80211_vht_cap));
4804 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4807 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4808 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4809 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4810 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4812 if (bss->wmm_used && bss->uapsd_supported &&
4813 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4814 assoc_data->uapsd = true;
4815 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4817 assoc_data->uapsd = false;
4818 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4821 if (req->prev_bssid)
4822 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4825 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4826 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4828 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4829 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4832 if (req->flags & ASSOC_REQ_USE_RRM)
4833 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4835 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4837 if (req->crypto.control_port)
4838 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4840 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4842 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4843 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4844 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4847 /* kick off associate process */
4849 ifmgd->assoc_data = assoc_data;
4850 ifmgd->dtim_period = 0;
4851 ifmgd->have_beacon = false;
4853 /* override HT/VHT configuration only if the AP and we support it */
4854 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4855 struct ieee80211_sta_ht_cap sta_ht_cap;
4857 if (req->flags & ASSOC_REQ_DISABLE_HT)
4860 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4861 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4863 /* check for 40 MHz disable override */
4864 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4865 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4866 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4869 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4870 req->flags & ASSOC_REQ_DISABLE_VHT)
4874 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4875 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4876 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4879 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4880 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4882 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4887 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4889 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4892 * Wait up to one beacon interval ...
4893 * should this be more if we miss one?
4895 sdata_info(sdata, "waiting for beacon from %pM\n",
4897 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4898 assoc_data->timeout_started = true;
4899 assoc_data->need_beacon = true;
4900 } else if (beacon_ies) {
4901 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4906 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4907 const struct ieee80211_tim_ie *tim;
4908 tim = (void *)(tim_ie + 2);
4909 ifmgd->dtim_period = tim->dtim_period;
4910 dtim_count = tim->dtim_count;
4912 ifmgd->have_beacon = true;
4913 assoc_data->timeout = jiffies;
4914 assoc_data->timeout_started = true;
4916 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4917 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4918 sdata->vif.bss_conf.sync_device_ts =
4919 bss->device_ts_beacon;
4920 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4923 assoc_data->timeout = jiffies;
4924 assoc_data->timeout_started = true;
4928 run_again(sdata, assoc_data->timeout);
4930 if (bss->corrupt_data) {
4931 char *corrupt_type = "data";
4932 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4933 if (bss->corrupt_data &
4934 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4935 corrupt_type = "beacon and probe response";
4937 corrupt_type = "beacon";
4938 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4939 corrupt_type = "probe response";
4940 sdata_info(sdata, "associating with AP with corrupt %s\n",
4946 eth_zero_addr(ifmgd->bssid);
4947 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4948 ifmgd->assoc_data = NULL;
4954 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4955 struct cfg80211_deauth_request *req)
4957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4958 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4959 bool tx = !req->local_state_change;
4961 if (ifmgd->auth_data &&
4962 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4964 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4965 req->bssid, req->reason_code,
4966 ieee80211_get_reason_code_string(req->reason_code));
4968 drv_mgd_prepare_tx(sdata->local, sdata);
4969 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4970 IEEE80211_STYPE_DEAUTH,
4971 req->reason_code, tx,
4973 ieee80211_destroy_auth_data(sdata, false);
4974 ieee80211_report_disconnect(sdata, frame_buf,
4975 sizeof(frame_buf), true,
4981 if (ifmgd->assoc_data &&
4982 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4984 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4985 req->bssid, req->reason_code,
4986 ieee80211_get_reason_code_string(req->reason_code));
4988 drv_mgd_prepare_tx(sdata->local, sdata);
4989 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4990 IEEE80211_STYPE_DEAUTH,
4991 req->reason_code, tx,
4993 ieee80211_destroy_assoc_data(sdata, false, true);
4994 ieee80211_report_disconnect(sdata, frame_buf,
4995 sizeof(frame_buf), true,
5000 if (ifmgd->associated &&
5001 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5003 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5004 req->bssid, req->reason_code,
5005 ieee80211_get_reason_code_string(req->reason_code));
5007 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5008 req->reason_code, tx, frame_buf);
5009 ieee80211_report_disconnect(sdata, frame_buf,
5010 sizeof(frame_buf), true,
5018 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5019 struct cfg80211_disassoc_request *req)
5021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5023 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5026 * cfg80211 should catch this ... but it's racy since
5027 * we can receive a disassoc frame, process it, hand it
5028 * to cfg80211 while that's in a locked section already
5029 * trying to tell us that the user wants to disconnect.
5031 if (ifmgd->associated != req->bss)
5035 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5036 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5038 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5039 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5040 req->reason_code, !req->local_state_change,
5043 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5049 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5051 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5054 * Make sure some work items will not run after this,
5055 * they will not do anything but might not have been
5056 * cancelled when disconnecting.
5058 cancel_work_sync(&ifmgd->monitor_work);
5059 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5060 cancel_work_sync(&ifmgd->request_smps_work);
5061 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5062 cancel_work_sync(&ifmgd->chswitch_work);
5063 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5066 if (ifmgd->assoc_data) {
5067 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5068 ieee80211_destroy_assoc_data(sdata, false, false);
5069 cfg80211_assoc_timeout(sdata->dev, bss);
5071 if (ifmgd->auth_data)
5072 ieee80211_destroy_auth_data(sdata, false);
5073 spin_lock_bh(&ifmgd->teardown_lock);
5074 if (ifmgd->teardown_skb) {
5075 kfree_skb(ifmgd->teardown_skb);
5076 ifmgd->teardown_skb = NULL;
5077 ifmgd->orig_teardown_skb = NULL;
5079 spin_unlock_bh(&ifmgd->teardown_lock);
5080 del_timer_sync(&ifmgd->timer);
5081 sdata_unlock(sdata);
5084 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5085 enum nl80211_cqm_rssi_threshold_event rssi_event,
5088 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5090 trace_api_cqm_rssi_notify(sdata, rssi_event);
5092 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5094 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5096 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5098 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5100 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5102 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5104 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);