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 /* XXX: shouldn't really modify cfg80211-owned data! */
1108 ifmgd->associated->channel = sdata->csa_chandef.chan;
1110 ifmgd->csa_waiting_bcn = true;
1112 ieee80211_sta_reset_beacon_monitor(sdata);
1113 ieee80211_sta_reset_conn_monitor(sdata);
1116 mutex_unlock(&local->chanctx_mtx);
1117 mutex_unlock(&local->mtx);
1118 sdata_unlock(sdata);
1121 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1123 struct ieee80211_local *local = sdata->local;
1124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1127 sdata_assert_lock(sdata);
1129 WARN_ON(!sdata->vif.csa_active);
1131 if (sdata->csa_block_tx) {
1132 ieee80211_wake_vif_queues(local, sdata,
1133 IEEE80211_QUEUE_STOP_REASON_CSA);
1134 sdata->csa_block_tx = false;
1137 sdata->vif.csa_active = false;
1138 ifmgd->csa_waiting_bcn = false;
1140 ret = drv_post_channel_switch(sdata);
1143 "driver post channel switch failed, disconnecting\n");
1144 ieee80211_queue_work(&local->hw,
1145 &ifmgd->csa_connection_drop_work);
1149 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1152 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1154 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1157 trace_api_chswitch_done(sdata, success);
1160 "driver channel switch failed, disconnecting\n");
1161 ieee80211_queue_work(&sdata->local->hw,
1162 &ifmgd->csa_connection_drop_work);
1164 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1167 EXPORT_SYMBOL(ieee80211_chswitch_done);
1169 static void ieee80211_chswitch_timer(unsigned long data)
1171 struct ieee80211_sub_if_data *sdata =
1172 (struct ieee80211_sub_if_data *) data;
1174 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1178 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1179 u64 timestamp, u32 device_timestamp,
1180 struct ieee802_11_elems *elems,
1183 struct ieee80211_local *local = sdata->local;
1184 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1185 struct cfg80211_bss *cbss = ifmgd->associated;
1186 struct ieee80211_chanctx_conf *conf;
1187 struct ieee80211_chanctx *chanctx;
1188 enum ieee80211_band current_band;
1189 struct ieee80211_csa_ie csa_ie;
1190 struct ieee80211_channel_switch ch_switch;
1193 sdata_assert_lock(sdata);
1198 if (local->scanning)
1201 /* disregard subsequent announcements if we are already processing */
1202 if (sdata->vif.csa_active)
1205 current_band = cbss->channel->band;
1206 memset(&csa_ie, 0, sizeof(csa_ie));
1207 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1209 ifmgd->associated->bssid, &csa_ie);
1211 ieee80211_queue_work(&local->hw,
1212 &ifmgd->csa_connection_drop_work);
1216 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1217 IEEE80211_CHAN_DISABLED)) {
1219 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1220 ifmgd->associated->bssid,
1221 csa_ie.chandef.chan->center_freq,
1222 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1223 csa_ie.chandef.center_freq2);
1224 ieee80211_queue_work(&local->hw,
1225 &ifmgd->csa_connection_drop_work);
1229 if (cfg80211_chandef_identical(&csa_ie.chandef,
1230 &sdata->vif.bss_conf.chandef)) {
1231 if (ifmgd->csa_ignored_same_chan)
1234 "AP %pM tries to chanswitch to same channel, ignore\n",
1235 ifmgd->associated->bssid);
1236 ifmgd->csa_ignored_same_chan = true;
1241 * Drop all TDLS peers - either we disconnect or move to a different
1242 * channel from this point on. There's no telling what our peer will do.
1243 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1244 * have an incompatible wider chandef.
1246 ieee80211_teardown_tdls_peers(sdata);
1248 mutex_lock(&local->mtx);
1249 mutex_lock(&local->chanctx_mtx);
1250 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1251 lockdep_is_held(&local->chanctx_mtx));
1254 "no channel context assigned to vif?, disconnecting\n");
1255 goto drop_connection;
1258 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1260 if (local->use_chanctx &&
1261 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1263 "driver doesn't support chan-switch with channel contexts\n");
1264 goto drop_connection;
1267 ch_switch.timestamp = timestamp;
1268 ch_switch.device_timestamp = device_timestamp;
1269 ch_switch.block_tx = csa_ie.mode;
1270 ch_switch.chandef = csa_ie.chandef;
1271 ch_switch.count = csa_ie.count;
1273 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1275 "preparing for channel switch failed, disconnecting\n");
1276 goto drop_connection;
1279 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1280 chanctx->mode, false);
1283 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1285 goto drop_connection;
1287 mutex_unlock(&local->chanctx_mtx);
1289 sdata->vif.csa_active = true;
1290 sdata->csa_chandef = csa_ie.chandef;
1291 sdata->csa_block_tx = csa_ie.mode;
1292 ifmgd->csa_ignored_same_chan = false;
1294 if (sdata->csa_block_tx)
1295 ieee80211_stop_vif_queues(local, sdata,
1296 IEEE80211_QUEUE_STOP_REASON_CSA);
1297 mutex_unlock(&local->mtx);
1299 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1302 if (local->ops->channel_switch) {
1303 /* use driver's channel switch callback */
1304 drv_channel_switch(local, sdata, &ch_switch);
1308 /* channel switch handled in software */
1309 if (csa_ie.count <= 1)
1310 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1312 mod_timer(&ifmgd->chswitch_timer,
1313 TU_TO_EXP_TIME((csa_ie.count - 1) *
1314 cbss->beacon_interval));
1317 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1318 mutex_unlock(&local->chanctx_mtx);
1319 mutex_unlock(&local->mtx);
1323 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1324 struct ieee80211_channel *channel,
1325 const u8 *country_ie, u8 country_ie_len,
1326 const u8 *pwr_constr_elem,
1327 int *chan_pwr, int *pwr_reduction)
1329 struct ieee80211_country_ie_triplet *triplet;
1330 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1331 int i, chan_increment;
1332 bool have_chan_pwr = false;
1335 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1338 triplet = (void *)(country_ie + 3);
1339 country_ie_len -= 3;
1341 switch (channel->band) {
1345 case IEEE80211_BAND_2GHZ:
1346 case IEEE80211_BAND_60GHZ:
1349 case IEEE80211_BAND_5GHZ:
1355 while (country_ie_len >= 3) {
1356 u8 first_channel = triplet->chans.first_channel;
1358 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1361 for (i = 0; i < triplet->chans.num_channels; i++) {
1362 if (first_channel + i * chan_increment == chan) {
1363 have_chan_pwr = true;
1364 *chan_pwr = triplet->chans.max_power;
1373 country_ie_len -= 3;
1376 if (have_chan_pwr && pwr_constr_elem)
1377 *pwr_reduction = *pwr_constr_elem;
1381 return have_chan_pwr;
1384 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1385 struct ieee80211_channel *channel,
1386 const u8 *cisco_dtpc_ie,
1389 /* From practical testing, the first data byte of the DTPC element
1390 * seems to contain the requested dBm level, and the CLI on Cisco
1391 * APs clearly state the range is -127 to 127 dBm, which indicates
1392 * a signed byte, although it seemingly never actually goes negative.
1393 * The other byte seems to always be zero.
1395 *pwr_level = (__s8)cisco_dtpc_ie[4];
1398 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1399 struct ieee80211_channel *channel,
1400 struct ieee80211_mgmt *mgmt,
1401 const u8 *country_ie, u8 country_ie_len,
1402 const u8 *pwr_constr_ie,
1403 const u8 *cisco_dtpc_ie)
1405 bool has_80211h_pwr = false, has_cisco_pwr = false;
1406 int chan_pwr = 0, pwr_reduction_80211h = 0;
1407 int pwr_level_cisco, pwr_level_80211h;
1409 __le16 capab = mgmt->u.probe_resp.capab_info;
1412 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1413 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1414 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1415 sdata, channel, country_ie, country_ie_len,
1416 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1418 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1421 if (cisco_dtpc_ie) {
1422 ieee80211_find_cisco_dtpc(
1423 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1424 has_cisco_pwr = true;
1427 if (!has_80211h_pwr && !has_cisco_pwr)
1430 /* If we have both 802.11h and Cisco DTPC, apply both limits
1431 * by picking the smallest of the two power levels advertised.
1433 if (has_80211h_pwr &&
1434 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1435 new_ap_level = pwr_level_80211h;
1437 if (sdata->ap_power_level == new_ap_level)
1441 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1442 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1443 sdata->u.mgd.bssid);
1444 } else { /* has_cisco_pwr is always true here. */
1445 new_ap_level = pwr_level_cisco;
1447 if (sdata->ap_power_level == new_ap_level)
1451 "Limiting TX power to %d dBm as advertised by %pM\n",
1452 pwr_level_cisco, sdata->u.mgd.bssid);
1455 sdata->ap_power_level = new_ap_level;
1456 if (__ieee80211_recalc_txpower(sdata))
1457 return BSS_CHANGED_TXPOWER;
1462 static void ieee80211_enable_ps(struct ieee80211_local *local,
1463 struct ieee80211_sub_if_data *sdata)
1465 struct ieee80211_conf *conf = &local->hw.conf;
1468 * If we are scanning right now then the parameters will
1469 * take effect when scan finishes.
1471 if (local->scanning)
1474 if (conf->dynamic_ps_timeout > 0 &&
1475 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1476 mod_timer(&local->dynamic_ps_timer, jiffies +
1477 msecs_to_jiffies(conf->dynamic_ps_timeout));
1479 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1480 ieee80211_send_nullfunc(local, sdata, true);
1482 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1483 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1486 conf->flags |= IEEE80211_CONF_PS;
1487 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1491 static void ieee80211_change_ps(struct ieee80211_local *local)
1493 struct ieee80211_conf *conf = &local->hw.conf;
1495 if (local->ps_sdata) {
1496 ieee80211_enable_ps(local, local->ps_sdata);
1497 } else if (conf->flags & IEEE80211_CONF_PS) {
1498 conf->flags &= ~IEEE80211_CONF_PS;
1499 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1500 del_timer_sync(&local->dynamic_ps_timer);
1501 cancel_work_sync(&local->dynamic_ps_enable_work);
1505 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1507 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1508 struct sta_info *sta = NULL;
1509 bool authorized = false;
1511 if (!mgd->powersave)
1517 if (!mgd->associated)
1520 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1523 if (!mgd->have_beacon)
1527 sta = sta_info_get(sdata, mgd->bssid);
1529 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1535 /* need to hold RTNL or interface lock */
1536 void ieee80211_recalc_ps(struct ieee80211_local *local)
1538 struct ieee80211_sub_if_data *sdata, *found = NULL;
1542 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1543 local->ps_sdata = NULL;
1547 list_for_each_entry(sdata, &local->interfaces, list) {
1548 if (!ieee80211_sdata_running(sdata))
1550 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1551 /* If an AP vif is found, then disable PS
1552 * by setting the count to zero thereby setting
1558 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1564 if (count == 1 && ieee80211_powersave_allowed(found)) {
1565 u8 dtimper = found->u.mgd.dtim_period;
1568 beaconint_us = ieee80211_tu_to_usec(
1569 found->vif.bss_conf.beacon_int);
1571 timeout = local->dynamic_ps_forced_timeout;
1574 local->hw.conf.dynamic_ps_timeout = timeout;
1576 /* If the TIM IE is invalid, pretend the value is 1 */
1580 local->hw.conf.ps_dtim_period = dtimper;
1581 local->ps_sdata = found;
1583 local->ps_sdata = NULL;
1586 ieee80211_change_ps(local);
1589 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1591 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1593 if (sdata->vif.bss_conf.ps != ps_allowed) {
1594 sdata->vif.bss_conf.ps = ps_allowed;
1595 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1599 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1601 struct ieee80211_local *local =
1602 container_of(work, struct ieee80211_local,
1603 dynamic_ps_disable_work);
1605 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1606 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1607 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1610 ieee80211_wake_queues_by_reason(&local->hw,
1611 IEEE80211_MAX_QUEUE_MAP,
1612 IEEE80211_QUEUE_STOP_REASON_PS,
1616 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1618 struct ieee80211_local *local =
1619 container_of(work, struct ieee80211_local,
1620 dynamic_ps_enable_work);
1621 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1622 struct ieee80211_if_managed *ifmgd;
1623 unsigned long flags;
1626 /* can only happen when PS was just disabled anyway */
1630 ifmgd = &sdata->u.mgd;
1632 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1635 if (local->hw.conf.dynamic_ps_timeout > 0) {
1636 /* don't enter PS if TX frames are pending */
1637 if (drv_tx_frames_pending(local)) {
1638 mod_timer(&local->dynamic_ps_timer, jiffies +
1640 local->hw.conf.dynamic_ps_timeout));
1645 * transmission can be stopped by others which leads to
1646 * dynamic_ps_timer expiry. Postpone the ps timer if it
1647 * is not the actual idle state.
1649 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1650 for (q = 0; q < local->hw.queues; q++) {
1651 if (local->queue_stop_reasons[q]) {
1652 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1654 mod_timer(&local->dynamic_ps_timer, jiffies +
1656 local->hw.conf.dynamic_ps_timeout));
1660 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1663 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1664 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1665 if (drv_tx_frames_pending(local)) {
1666 mod_timer(&local->dynamic_ps_timer, jiffies +
1668 local->hw.conf.dynamic_ps_timeout));
1670 ieee80211_send_nullfunc(local, sdata, true);
1671 /* Flush to get the tx status of nullfunc frame */
1672 ieee80211_flush_queues(local, sdata, false);
1676 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1677 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1678 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1679 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1680 local->hw.conf.flags |= IEEE80211_CONF_PS;
1681 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1685 void ieee80211_dynamic_ps_timer(unsigned long data)
1687 struct ieee80211_local *local = (void *) data;
1689 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1692 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1694 struct delayed_work *delayed_work =
1695 container_of(work, struct delayed_work, work);
1696 struct ieee80211_sub_if_data *sdata =
1697 container_of(delayed_work, struct ieee80211_sub_if_data,
1698 dfs_cac_timer_work);
1699 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1701 mutex_lock(&sdata->local->mtx);
1702 if (sdata->wdev.cac_started) {
1703 ieee80211_vif_release_channel(sdata);
1704 cfg80211_cac_event(sdata->dev, &chandef,
1705 NL80211_RADAR_CAC_FINISHED,
1708 mutex_unlock(&sdata->local->mtx);
1712 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1714 struct ieee80211_local *local = sdata->local;
1715 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1719 if (local->hw.queues < IEEE80211_NUM_ACS)
1722 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1723 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1725 unsigned long now = jiffies;
1727 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1728 tx_tspec->admitted_time &&
1729 time_after(now, tx_tspec->time_slice_start + HZ)) {
1730 tx_tspec->consumed_tx_time = 0;
1731 tx_tspec->time_slice_start = now;
1733 if (tx_tspec->downgraded)
1735 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1738 switch (tx_tspec->action) {
1739 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1740 /* take the original parameters */
1741 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1743 "failed to set TX queue parameters for queue %d\n",
1745 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1746 tx_tspec->downgraded = false;
1749 case TX_TSPEC_ACTION_DOWNGRADE:
1750 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1751 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1755 /* downgrade next lower non-ACM AC */
1756 for (non_acm_ac = ac + 1;
1757 non_acm_ac < IEEE80211_NUM_ACS;
1759 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1761 /* The loop will result in using BK even if it requires
1762 * admission control, such configuration makes no sense
1763 * and we have to transmit somehow - the AC selection
1764 * does the same thing.
1766 if (drv_conf_tx(local, sdata, ac,
1767 &sdata->tx_conf[non_acm_ac]))
1769 "failed to set TX queue parameters for queue %d\n",
1771 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1773 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1774 tx_tspec->time_slice_start + HZ - now + 1);
1776 case TX_TSPEC_ACTION_NONE:
1785 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1787 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1788 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1791 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1793 struct ieee80211_sub_if_data *sdata;
1795 sdata = container_of(work, struct ieee80211_sub_if_data,
1796 u.mgd.tx_tspec_wk.work);
1797 ieee80211_sta_handle_tspec_ac_params(sdata);
1801 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1802 struct ieee80211_sub_if_data *sdata,
1803 const u8 *wmm_param, size_t wmm_param_len)
1805 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1806 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1810 u8 uapsd_queues = 0;
1812 if (!local->ops->conf_tx)
1815 if (local->hw.queues < IEEE80211_NUM_ACS)
1821 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1824 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1825 uapsd_queues = ifmgd->uapsd_queues;
1827 count = wmm_param[6] & 0x0f;
1828 if (count == ifmgd->wmm_last_param_set)
1830 ifmgd->wmm_last_param_set = count;
1832 pos = wmm_param + 8;
1833 left = wmm_param_len - 8;
1835 memset(¶ms, 0, sizeof(params));
1838 for (; left >= 4; left -= 4, pos += 4) {
1839 int aci = (pos[0] >> 5) & 0x03;
1840 int acm = (pos[0] >> 4) & 0x01;
1845 ac = IEEE80211_AC_BK;
1847 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1848 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1852 ac = IEEE80211_AC_VI;
1854 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1855 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1859 ac = IEEE80211_AC_VO;
1861 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1862 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1867 ac = IEEE80211_AC_BE;
1869 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1870 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1875 params[ac].aifs = pos[0] & 0x0f;
1877 if (params[ac].aifs < 2) {
1879 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1880 params[ac].aifs, aci);
1881 params[ac].aifs = 2;
1883 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1884 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1885 params[ac].txop = get_unaligned_le16(pos + 2);
1886 params[ac].acm = acm;
1887 params[ac].uapsd = uapsd;
1889 if (params[ac].cw_min > params[ac].cw_max) {
1891 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1892 params[ac].cw_min, params[ac].cw_max, aci);
1897 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1899 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1901 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1902 params[ac].txop, params[ac].uapsd,
1903 ifmgd->tx_tspec[ac].downgraded);
1904 sdata->tx_conf[ac] = params[ac];
1905 if (!ifmgd->tx_tspec[ac].downgraded &&
1906 drv_conf_tx(local, sdata, ac, ¶ms[ac]))
1908 "failed to set TX queue parameters for AC %d\n",
1912 /* enable WMM or activate new settings */
1913 sdata->vif.bss_conf.qos = true;
1917 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1919 lockdep_assert_held(&sdata->local->mtx);
1921 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1922 ieee80211_run_deferred_scan(sdata->local);
1925 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1927 mutex_lock(&sdata->local->mtx);
1928 __ieee80211_stop_poll(sdata);
1929 mutex_unlock(&sdata->local->mtx);
1932 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1933 u16 capab, bool erp_valid, u8 erp)
1935 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1937 bool use_protection;
1938 bool use_short_preamble;
1939 bool use_short_slot;
1942 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1943 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1945 use_protection = false;
1946 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1949 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1950 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1951 use_short_slot = true;
1953 if (use_protection != bss_conf->use_cts_prot) {
1954 bss_conf->use_cts_prot = use_protection;
1955 changed |= BSS_CHANGED_ERP_CTS_PROT;
1958 if (use_short_preamble != bss_conf->use_short_preamble) {
1959 bss_conf->use_short_preamble = use_short_preamble;
1960 changed |= BSS_CHANGED_ERP_PREAMBLE;
1963 if (use_short_slot != bss_conf->use_short_slot) {
1964 bss_conf->use_short_slot = use_short_slot;
1965 changed |= BSS_CHANGED_ERP_SLOT;
1971 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1972 struct cfg80211_bss *cbss,
1973 u32 bss_info_changed)
1975 struct ieee80211_bss *bss = (void *)cbss->priv;
1976 struct ieee80211_local *local = sdata->local;
1977 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1979 bss_info_changed |= BSS_CHANGED_ASSOC;
1980 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1981 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1983 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1984 beacon_loss_count * bss_conf->beacon_int));
1986 sdata->u.mgd.associated = cbss;
1987 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1989 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1991 if (sdata->vif.p2p) {
1992 const struct cfg80211_bss_ies *ies;
1995 ies = rcu_dereference(cbss->ies);
1999 ret = cfg80211_get_p2p_attr(
2000 ies->data, ies->len,
2001 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2002 (u8 *) &bss_conf->p2p_noa_attr,
2003 sizeof(bss_conf->p2p_noa_attr));
2005 sdata->u.mgd.p2p_noa_index =
2006 bss_conf->p2p_noa_attr.index;
2007 bss_info_changed |= BSS_CHANGED_P2P_PS;
2013 /* just to be sure */
2014 ieee80211_stop_poll(sdata);
2016 ieee80211_led_assoc(local, 1);
2018 if (sdata->u.mgd.have_beacon) {
2020 * If the AP is buggy we may get here with no DTIM period
2021 * known, so assume it's 1 which is the only safe assumption
2022 * in that case, although if the TIM IE is broken powersave
2023 * probably just won't work at all.
2025 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2026 bss_conf->beacon_rate = bss->beacon_rate;
2027 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2029 bss_conf->beacon_rate = NULL;
2030 bss_conf->dtim_period = 0;
2033 bss_conf->assoc = 1;
2035 /* Tell the driver to monitor connection quality (if supported) */
2036 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2037 bss_conf->cqm_rssi_thold)
2038 bss_info_changed |= BSS_CHANGED_CQM;
2040 /* Enable ARP filtering */
2041 if (bss_conf->arp_addr_cnt)
2042 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2044 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2046 mutex_lock(&local->iflist_mtx);
2047 ieee80211_recalc_ps(local);
2048 mutex_unlock(&local->iflist_mtx);
2050 ieee80211_recalc_smps(sdata);
2051 ieee80211_recalc_ps_vif(sdata);
2053 netif_carrier_on(sdata->dev);
2056 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2057 u16 stype, u16 reason, bool tx,
2060 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2061 struct ieee80211_local *local = sdata->local;
2064 sdata_assert_lock(sdata);
2066 if (WARN_ON_ONCE(tx && !frame_buf))
2069 if (WARN_ON(!ifmgd->associated))
2072 ieee80211_stop_poll(sdata);
2074 ifmgd->associated = NULL;
2075 netif_carrier_off(sdata->dev);
2078 * if we want to get out of ps before disassoc (why?) we have
2079 * to do it before sending disassoc, as otherwise the null-packet
2082 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2083 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2084 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2086 local->ps_sdata = NULL;
2088 /* disable per-vif ps */
2089 ieee80211_recalc_ps_vif(sdata);
2091 /* make sure ongoing transmission finishes */
2095 * drop any frame before deauth/disassoc, this can be data or
2096 * management frame. Since we are disconnecting, we should not
2097 * insist sending these frames which can take time and delay
2098 * the disconnection and possible the roaming.
2101 ieee80211_flush_queues(local, sdata, true);
2103 /* deauthenticate/disassociate now */
2104 if (tx || frame_buf)
2105 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2106 reason, tx, frame_buf);
2108 /* flush out frame - make sure the deauth was actually sent */
2110 ieee80211_flush_queues(local, sdata, false);
2112 /* clear bssid only after building the needed mgmt frames */
2113 eth_zero_addr(ifmgd->bssid);
2115 /* remove AP and TDLS peers */
2116 sta_info_flush(sdata);
2118 /* finally reset all BSS / config parameters */
2119 changed |= ieee80211_reset_erp_info(sdata);
2121 ieee80211_led_assoc(local, 0);
2122 changed |= BSS_CHANGED_ASSOC;
2123 sdata->vif.bss_conf.assoc = false;
2125 ifmgd->p2p_noa_index = -1;
2126 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2127 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2129 /* on the next assoc, re-program HT/VHT parameters */
2130 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2131 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2132 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2133 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2134 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2136 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2138 del_timer_sync(&local->dynamic_ps_timer);
2139 cancel_work_sync(&local->dynamic_ps_enable_work);
2141 /* Disable ARP filtering */
2142 if (sdata->vif.bss_conf.arp_addr_cnt)
2143 changed |= BSS_CHANGED_ARP_FILTER;
2145 sdata->vif.bss_conf.qos = false;
2146 changed |= BSS_CHANGED_QOS;
2148 /* The BSSID (not really interesting) and HT changed */
2149 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2150 ieee80211_bss_info_change_notify(sdata, changed);
2152 /* disassociated - set to defaults now */
2153 ieee80211_set_wmm_default(sdata, false, false);
2155 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2156 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2157 del_timer_sync(&sdata->u.mgd.timer);
2158 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2160 sdata->vif.bss_conf.dtim_period = 0;
2161 sdata->vif.bss_conf.beacon_rate = NULL;
2163 ifmgd->have_beacon = false;
2166 mutex_lock(&local->mtx);
2167 ieee80211_vif_release_channel(sdata);
2169 sdata->vif.csa_active = false;
2170 ifmgd->csa_waiting_bcn = false;
2171 ifmgd->csa_ignored_same_chan = false;
2172 if (sdata->csa_block_tx) {
2173 ieee80211_wake_vif_queues(local, sdata,
2174 IEEE80211_QUEUE_STOP_REASON_CSA);
2175 sdata->csa_block_tx = false;
2177 mutex_unlock(&local->mtx);
2179 /* existing TX TSPEC sessions no longer exist */
2180 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2181 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2183 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2186 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2187 struct ieee80211_hdr *hdr)
2190 * We can postpone the mgd.timer whenever receiving unicast frames
2191 * from AP because we know that the connection is working both ways
2192 * at that time. But multicast frames (and hence also beacons) must
2193 * be ignored here, because we need to trigger the timer during
2194 * data idle periods for sending the periodic probe request to the
2195 * AP we're connected to.
2197 if (is_multicast_ether_addr(hdr->addr1))
2200 ieee80211_sta_reset_conn_monitor(sdata);
2203 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2205 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2206 struct ieee80211_local *local = sdata->local;
2208 mutex_lock(&local->mtx);
2209 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2212 __ieee80211_stop_poll(sdata);
2214 mutex_lock(&local->iflist_mtx);
2215 ieee80211_recalc_ps(local);
2216 mutex_unlock(&local->iflist_mtx);
2218 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2222 * We've received a probe response, but are not sure whether
2223 * we have or will be receiving any beacons or data, so let's
2224 * schedule the timers again, just in case.
2226 ieee80211_sta_reset_beacon_monitor(sdata);
2228 mod_timer(&ifmgd->conn_mon_timer,
2229 round_jiffies_up(jiffies +
2230 IEEE80211_CONNECTION_IDLE_TIME));
2232 mutex_unlock(&local->mtx);
2235 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2236 struct ieee80211_hdr *hdr,
2239 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2240 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2241 int ac = ieee80211_ac_from_tid(tid);
2242 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2243 unsigned long now = jiffies;
2245 if (likely(!tx_tspec->admitted_time))
2248 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2249 tx_tspec->consumed_tx_time = 0;
2250 tx_tspec->time_slice_start = now;
2252 if (tx_tspec->downgraded) {
2253 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2254 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2258 if (tx_tspec->downgraded)
2261 tx_tspec->consumed_tx_time += tx_time;
2263 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2264 tx_tspec->downgraded = true;
2265 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2266 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2270 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2271 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2273 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2275 if (!ieee80211_is_data(hdr->frame_control))
2278 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2279 sdata->u.mgd.probe_send_count > 0) {
2281 ieee80211_sta_reset_conn_monitor(sdata);
2283 sdata->u.mgd.nullfunc_failed = true;
2284 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2289 ieee80211_sta_reset_conn_monitor(sdata);
2292 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2296 u8 *dst = ifmgd->associated->bssid;
2297 u8 unicast_limit = max(1, max_probe_tries - 3);
2300 * Try sending broadcast probe requests for the last three
2301 * probe requests after the first ones failed since some
2302 * buggy APs only support broadcast probe requests.
2304 if (ifmgd->probe_send_count >= unicast_limit)
2308 * When the hardware reports an accurate Tx ACK status, it's
2309 * better to send a nullfunc frame instead of a probe request,
2310 * as it will kick us off the AP quickly if we aren't associated
2311 * anymore. The timeout will be reset if the frame is ACKed by
2314 ifmgd->probe_send_count++;
2316 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2317 ifmgd->nullfunc_failed = false;
2318 ieee80211_send_nullfunc(sdata->local, sdata, false);
2323 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2324 if (WARN_ON_ONCE(ssid == NULL))
2329 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2330 ssid + 2, ssid_len, NULL,
2331 0, (u32) -1, true, 0,
2332 ifmgd->associated->channel, false);
2336 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2337 run_again(sdata, ifmgd->probe_timeout);
2340 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2344 bool already = false;
2346 if (!ieee80211_sdata_running(sdata))
2351 if (!ifmgd->associated)
2354 mutex_lock(&sdata->local->mtx);
2356 if (sdata->local->tmp_channel || sdata->local->scanning) {
2357 mutex_unlock(&sdata->local->mtx);
2362 mlme_dbg_ratelimited(sdata,
2363 "detected beacon loss from AP (missed %d beacons) - probing\n",
2366 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2370 * The driver/our work has already reported this event or the
2371 * connection monitoring has kicked in and we have already sent
2372 * a probe request. Or maybe the AP died and the driver keeps
2373 * reporting until we disassociate...
2375 * In either case we have to ignore the current call to this
2376 * function (except for setting the correct probe reason bit)
2377 * because otherwise we would reset the timer every time and
2378 * never check whether we received a probe response!
2380 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2383 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2385 mutex_unlock(&sdata->local->mtx);
2390 mutex_lock(&sdata->local->iflist_mtx);
2391 ieee80211_recalc_ps(sdata->local);
2392 mutex_unlock(&sdata->local->iflist_mtx);
2394 ifmgd->probe_send_count = 0;
2395 ieee80211_mgd_probe_ap_send(sdata);
2397 sdata_unlock(sdata);
2400 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2401 struct ieee80211_vif *vif)
2403 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2404 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2405 struct cfg80211_bss *cbss;
2406 struct sk_buff *skb;
2410 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2413 sdata_assert_lock(sdata);
2415 if (ifmgd->associated)
2416 cbss = ifmgd->associated;
2417 else if (ifmgd->auth_data)
2418 cbss = ifmgd->auth_data->bss;
2419 else if (ifmgd->assoc_data)
2420 cbss = ifmgd->assoc_data->bss;
2425 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2426 if (WARN_ON_ONCE(ssid == NULL))
2431 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2432 (u32) -1, cbss->channel,
2439 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2441 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2442 const u8 *buf, size_t len, bool tx,
2445 struct ieee80211_event event = {
2447 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2448 .u.mlme.reason = reason,
2452 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2454 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2456 drv_event_callback(sdata->local, sdata, &event);
2459 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2461 struct ieee80211_local *local = sdata->local;
2462 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2463 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2466 if (!ifmgd->associated) {
2467 sdata_unlock(sdata);
2471 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2472 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2474 mutex_lock(&local->mtx);
2475 sdata->vif.csa_active = false;
2476 ifmgd->csa_waiting_bcn = false;
2477 if (sdata->csa_block_tx) {
2478 ieee80211_wake_vif_queues(local, sdata,
2479 IEEE80211_QUEUE_STOP_REASON_CSA);
2480 sdata->csa_block_tx = false;
2482 mutex_unlock(&local->mtx);
2484 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2485 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2487 sdata_unlock(sdata);
2490 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2492 struct ieee80211_sub_if_data *sdata =
2493 container_of(work, struct ieee80211_sub_if_data,
2494 u.mgd.beacon_connection_loss_work);
2495 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2497 if (ifmgd->associated)
2498 ifmgd->beacon_loss_count++;
2500 if (ifmgd->connection_loss) {
2501 sdata_info(sdata, "Connection to AP %pM lost\n",
2503 __ieee80211_disconnect(sdata);
2505 ieee80211_mgd_probe_ap(sdata, true);
2509 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2511 struct ieee80211_sub_if_data *sdata =
2512 container_of(work, struct ieee80211_sub_if_data,
2513 u.mgd.csa_connection_drop_work);
2515 __ieee80211_disconnect(sdata);
2518 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2520 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2521 struct ieee80211_hw *hw = &sdata->local->hw;
2523 trace_api_beacon_loss(sdata);
2525 sdata->u.mgd.connection_loss = false;
2526 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2528 EXPORT_SYMBOL(ieee80211_beacon_loss);
2530 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2532 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2533 struct ieee80211_hw *hw = &sdata->local->hw;
2535 trace_api_connection_loss(sdata);
2537 sdata->u.mgd.connection_loss = true;
2538 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2540 EXPORT_SYMBOL(ieee80211_connection_loss);
2543 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2546 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2548 sdata_assert_lock(sdata);
2552 * we are not authenticated yet, the only timer that could be
2553 * running is the timeout for the authentication response which
2554 * which is not relevant anymore.
2556 del_timer_sync(&sdata->u.mgd.timer);
2557 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2559 eth_zero_addr(sdata->u.mgd.bssid);
2560 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2561 sdata->u.mgd.flags = 0;
2562 mutex_lock(&sdata->local->mtx);
2563 ieee80211_vif_release_channel(sdata);
2564 mutex_unlock(&sdata->local->mtx);
2567 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2569 sdata->u.mgd.auth_data = NULL;
2572 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2573 bool assoc, bool abandon)
2575 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2577 sdata_assert_lock(sdata);
2581 * we are not associated yet, the only timer that could be
2582 * running is the timeout for the association response which
2583 * which is not relevant anymore.
2585 del_timer_sync(&sdata->u.mgd.timer);
2586 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2588 eth_zero_addr(sdata->u.mgd.bssid);
2589 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2590 sdata->u.mgd.flags = 0;
2591 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2592 mutex_lock(&sdata->local->mtx);
2593 ieee80211_vif_release_channel(sdata);
2594 mutex_unlock(&sdata->local->mtx);
2597 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2601 sdata->u.mgd.assoc_data = NULL;
2604 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2605 struct ieee80211_mgmt *mgmt, size_t len)
2607 struct ieee80211_local *local = sdata->local;
2608 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2610 struct ieee802_11_elems elems;
2613 pos = mgmt->u.auth.variable;
2614 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2615 if (!elems.challenge)
2617 auth_data->expected_transaction = 4;
2618 drv_mgd_prepare_tx(sdata->local, sdata);
2619 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2620 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2621 IEEE80211_TX_INTFL_MLME_CONN_TX;
2622 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2623 elems.challenge - 2, elems.challenge_len + 2,
2624 auth_data->bss->bssid, auth_data->bss->bssid,
2625 auth_data->key, auth_data->key_len,
2626 auth_data->key_idx, tx_flags);
2629 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2630 struct ieee80211_mgmt *mgmt, size_t len)
2632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2634 u16 auth_alg, auth_transaction, status_code;
2635 struct sta_info *sta;
2636 struct ieee80211_event event = {
2638 .u.mlme.data = AUTH_EVENT,
2641 sdata_assert_lock(sdata);
2646 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2649 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2651 if (!ether_addr_equal(bssid, mgmt->bssid))
2654 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2655 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2656 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2658 if (auth_alg != ifmgd->auth_data->algorithm ||
2659 auth_transaction != ifmgd->auth_data->expected_transaction) {
2660 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2661 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2663 ifmgd->auth_data->expected_transaction);
2667 if (status_code != WLAN_STATUS_SUCCESS) {
2668 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2669 mgmt->sa, status_code);
2670 ieee80211_destroy_auth_data(sdata, false);
2671 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2672 event.u.mlme.status = MLME_DENIED;
2673 event.u.mlme.reason = status_code;
2674 drv_event_callback(sdata->local, sdata, &event);
2678 switch (ifmgd->auth_data->algorithm) {
2679 case WLAN_AUTH_OPEN:
2680 case WLAN_AUTH_LEAP:
2684 case WLAN_AUTH_SHARED_KEY:
2685 if (ifmgd->auth_data->expected_transaction != 4) {
2686 ieee80211_auth_challenge(sdata, mgmt, len);
2687 /* need another frame */
2692 WARN_ONCE(1, "invalid auth alg %d",
2693 ifmgd->auth_data->algorithm);
2697 event.u.mlme.status = MLME_SUCCESS;
2698 drv_event_callback(sdata->local, sdata, &event);
2699 sdata_info(sdata, "authenticated\n");
2700 ifmgd->auth_data->done = true;
2701 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2702 ifmgd->auth_data->timeout_started = true;
2703 run_again(sdata, ifmgd->auth_data->timeout);
2705 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2706 ifmgd->auth_data->expected_transaction != 2) {
2708 * Report auth frame to user space for processing since another
2709 * round of Authentication frames is still needed.
2711 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2715 /* move station state to auth */
2716 mutex_lock(&sdata->local->sta_mtx);
2717 sta = sta_info_get(sdata, bssid);
2719 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2722 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2723 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2726 mutex_unlock(&sdata->local->sta_mtx);
2728 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2731 mutex_unlock(&sdata->local->sta_mtx);
2732 /* ignore frame -- wait for timeout */
2735 #define case_WLAN(type) \
2736 case WLAN_REASON_##type: return #type
2738 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2740 switch (reason_code) {
2741 case_WLAN(UNSPECIFIED);
2742 case_WLAN(PREV_AUTH_NOT_VALID);
2743 case_WLAN(DEAUTH_LEAVING);
2744 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2745 case_WLAN(DISASSOC_AP_BUSY);
2746 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2747 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2748 case_WLAN(DISASSOC_STA_HAS_LEFT);
2749 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2750 case_WLAN(DISASSOC_BAD_POWER);
2751 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2752 case_WLAN(INVALID_IE);
2753 case_WLAN(MIC_FAILURE);
2754 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2755 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2756 case_WLAN(IE_DIFFERENT);
2757 case_WLAN(INVALID_GROUP_CIPHER);
2758 case_WLAN(INVALID_PAIRWISE_CIPHER);
2759 case_WLAN(INVALID_AKMP);
2760 case_WLAN(UNSUPP_RSN_VERSION);
2761 case_WLAN(INVALID_RSN_IE_CAP);
2762 case_WLAN(IEEE8021X_FAILED);
2763 case_WLAN(CIPHER_SUITE_REJECTED);
2764 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2765 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2766 case_WLAN(DISASSOC_LOW_ACK);
2767 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2768 case_WLAN(QSTA_LEAVE_QBSS);
2769 case_WLAN(QSTA_NOT_USE);
2770 case_WLAN(QSTA_REQUIRE_SETUP);
2771 case_WLAN(QSTA_TIMEOUT);
2772 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2773 case_WLAN(MESH_PEER_CANCELED);
2774 case_WLAN(MESH_MAX_PEERS);
2775 case_WLAN(MESH_CONFIG);
2776 case_WLAN(MESH_CLOSE);
2777 case_WLAN(MESH_MAX_RETRIES);
2778 case_WLAN(MESH_CONFIRM_TIMEOUT);
2779 case_WLAN(MESH_INVALID_GTK);
2780 case_WLAN(MESH_INCONSISTENT_PARAM);
2781 case_WLAN(MESH_INVALID_SECURITY);
2782 case_WLAN(MESH_PATH_ERROR);
2783 case_WLAN(MESH_PATH_NOFORWARD);
2784 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2785 case_WLAN(MAC_EXISTS_IN_MBSS);
2786 case_WLAN(MESH_CHAN_REGULATORY);
2787 case_WLAN(MESH_CHAN);
2788 default: return "<unknown>";
2792 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2793 struct ieee80211_mgmt *mgmt, size_t len)
2795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2796 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2798 sdata_assert_lock(sdata);
2803 if (ifmgd->associated &&
2804 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2805 const u8 *bssid = ifmgd->associated->bssid;
2807 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2809 ieee80211_get_reason_code_string(reason_code));
2811 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2813 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2818 if (ifmgd->assoc_data &&
2819 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2820 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2823 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2825 ieee80211_get_reason_code_string(reason_code));
2827 ieee80211_destroy_assoc_data(sdata, false, true);
2829 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2835 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2836 struct ieee80211_mgmt *mgmt, size_t len)
2838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2841 sdata_assert_lock(sdata);
2846 if (!ifmgd->associated ||
2847 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2850 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2852 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2853 mgmt->sa, reason_code);
2855 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2857 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2860 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2861 u8 *supp_rates, unsigned int supp_rates_len,
2862 u32 *rates, u32 *basic_rates,
2863 bool *have_higher_than_11mbit,
2864 int *min_rate, int *min_rate_index,
2865 int shift, u32 rate_flags)
2869 for (i = 0; i < supp_rates_len; i++) {
2870 int rate = supp_rates[i] & 0x7f;
2871 bool is_basic = !!(supp_rates[i] & 0x80);
2873 if ((rate * 5 * (1 << shift)) > 110)
2874 *have_higher_than_11mbit = true;
2877 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2878 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2880 * Note: Even through the membership selector and the basic
2881 * rate flag share the same bit, they are not exactly
2884 if (!!(supp_rates[i] & 0x80) &&
2885 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2888 for (j = 0; j < sband->n_bitrates; j++) {
2889 struct ieee80211_rate *br;
2892 br = &sband->bitrates[j];
2893 if ((rate_flags & br->flags) != rate_flags)
2896 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2897 if (brate == rate) {
2900 *basic_rates |= BIT(j);
2901 if ((rate * 5) < *min_rate) {
2902 *min_rate = rate * 5;
2903 *min_rate_index = j;
2911 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2912 struct cfg80211_bss *cbss,
2913 struct ieee80211_mgmt *mgmt, size_t len)
2915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2916 struct ieee80211_local *local = sdata->local;
2917 struct ieee80211_supported_band *sband;
2918 struct sta_info *sta;
2920 u16 capab_info, aid;
2921 struct ieee802_11_elems elems;
2922 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2923 const struct cfg80211_bss_ies *bss_ies = NULL;
2924 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2929 /* AssocResp and ReassocResp have identical structure */
2931 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2932 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2934 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2935 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2937 aid &= ~(BIT(15) | BIT(14));
2939 ifmgd->broken_ap = false;
2941 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2942 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2945 ifmgd->broken_ap = true;
2948 pos = mgmt->u.assoc_resp.variable;
2949 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2951 if (!elems.supp_rates) {
2952 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2957 ifmgd->tdls_chan_switch_prohibited =
2958 elems.ext_capab && elems.ext_capab_len >= 5 &&
2959 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2962 * Some APs are erroneously not including some information in their
2963 * (re)association response frames. Try to recover by using the data
2964 * from the beacon or probe response. This seems to afflict mobile
2965 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2966 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2968 if ((assoc_data->wmm && !elems.wmm_param) ||
2969 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2970 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2971 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2972 (!elems.vht_cap_elem || !elems.vht_operation))) {
2973 const struct cfg80211_bss_ies *ies;
2974 struct ieee802_11_elems bss_elems;
2977 ies = rcu_dereference(cbss->ies);
2979 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2985 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2987 if (assoc_data->wmm &&
2988 !elems.wmm_param && bss_elems.wmm_param) {
2989 elems.wmm_param = bss_elems.wmm_param;
2991 "AP bug: WMM param missing from AssocResp\n");
2995 * Also check if we requested HT/VHT, otherwise the AP doesn't
2996 * have to include the IEs in the (re)association response.
2998 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2999 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3000 elems.ht_cap_elem = bss_elems.ht_cap_elem;
3002 "AP bug: HT capability missing from AssocResp\n");
3004 if (!elems.ht_operation && bss_elems.ht_operation &&
3005 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3006 elems.ht_operation = bss_elems.ht_operation;
3008 "AP bug: HT operation missing from AssocResp\n");
3010 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3011 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3012 elems.vht_cap_elem = bss_elems.vht_cap_elem;
3014 "AP bug: VHT capa missing from AssocResp\n");
3016 if (!elems.vht_operation && bss_elems.vht_operation &&
3017 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3018 elems.vht_operation = bss_elems.vht_operation;
3020 "AP bug: VHT operation missing from AssocResp\n");
3025 * We previously checked these in the beacon/probe response, so
3026 * they should be present here. This is just a safety net.
3028 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3029 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3031 "HT AP is missing WMM params or HT capability/operation\n");
3036 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3037 (!elems.vht_cap_elem || !elems.vht_operation)) {
3039 "VHT AP is missing VHT capability/operation\n");
3044 mutex_lock(&sdata->local->sta_mtx);
3046 * station info was already allocated and inserted before
3047 * the association and should be available to us
3049 sta = sta_info_get(sdata, cbss->bssid);
3050 if (WARN_ON(!sta)) {
3051 mutex_unlock(&sdata->local->sta_mtx);
3056 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
3058 /* Set up internal HT/VHT capabilities */
3059 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3060 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3061 elems.ht_cap_elem, sta);
3063 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3064 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3065 elems.vht_cap_elem, sta);
3068 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3069 * in their association response, so ignore that data for our own
3070 * configuration. If it changed since the last beacon, we'll get the
3071 * next beacon and update then.
3075 * If an operating mode notification IE is present, override the
3076 * NSS calculation (that would be done in rate_control_rate_init())
3077 * and use the # of streams from that element.
3079 if (elems.opmode_notif &&
3080 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3083 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3084 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3086 sta->sta.rx_nss = nss;
3089 rate_control_rate_init(sta);
3091 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3092 set_sta_flag(sta, WLAN_STA_MFP);
3093 sta->sta.mfp = true;
3095 sta->sta.mfp = false;
3098 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3100 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3101 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3102 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3105 "failed to move station %pM to desired state\n",
3107 WARN_ON(__sta_info_destroy(sta));
3108 mutex_unlock(&sdata->local->sta_mtx);
3113 mutex_unlock(&sdata->local->sta_mtx);
3116 * Always handle WMM once after association regardless
3117 * of the first value the AP uses. Setting -1 here has
3118 * that effect because the AP values is an unsigned
3121 ifmgd->wmm_last_param_set = -1;
3123 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3124 ieee80211_set_wmm_default(sdata, false, false);
3125 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3126 elems.wmm_param_len)) {
3127 /* still enable QoS since we might have HT/VHT */
3128 ieee80211_set_wmm_default(sdata, false, true);
3129 /* set the disable-WMM flag in this case to disable
3130 * tracking WMM parameter changes in the beacon if
3131 * the parameters weren't actually valid. Doing so
3132 * avoids changing parameters very strangely when
3133 * the AP is going back and forth between valid and
3134 * invalid parameters.
3136 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3138 changed |= BSS_CHANGED_QOS;
3140 /* set AID and assoc capability,
3141 * ieee80211_set_associated() will tell the driver */
3142 bss_conf->aid = aid;
3143 bss_conf->assoc_capability = capab_info;
3144 ieee80211_set_associated(sdata, cbss, changed);
3147 * If we're using 4-addr mode, let the AP know that we're
3148 * doing so, so that it can create the STA VLAN on its side
3150 if (ifmgd->use_4addr)
3151 ieee80211_send_4addr_nullfunc(local, sdata);
3154 * Start timer to probe the connection to the AP now.
3155 * Also start the timer that will detect beacon loss.
3157 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3158 ieee80211_sta_reset_beacon_monitor(sdata);
3166 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3167 struct ieee80211_mgmt *mgmt,
3170 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3171 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3172 u16 capab_info, status_code, aid;
3173 struct ieee802_11_elems elems;
3174 int ac, uapsd_queues = -1;
3177 struct cfg80211_bss *bss;
3178 struct ieee80211_event event = {
3180 .u.mlme.data = ASSOC_EVENT,
3183 sdata_assert_lock(sdata);
3187 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3191 * AssocResp and ReassocResp have identical structure, so process both
3192 * of them in this function.
3198 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3199 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3200 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3201 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3204 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3205 reassoc ? "Rea" : "A", mgmt->sa,
3206 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3208 pos = mgmt->u.assoc_resp.variable;
3209 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3211 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3212 elems.timeout_int &&
3213 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3215 tu = le32_to_cpu(elems.timeout_int->value);
3216 ms = tu * 1024 / 1000;
3218 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3220 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3221 assoc_data->timeout_started = true;
3222 if (ms > IEEE80211_ASSOC_TIMEOUT)
3223 run_again(sdata, assoc_data->timeout);
3227 bss = assoc_data->bss;
3229 if (status_code != WLAN_STATUS_SUCCESS) {
3230 sdata_info(sdata, "%pM denied association (code=%d)\n",
3231 mgmt->sa, status_code);
3232 ieee80211_destroy_assoc_data(sdata, false, false);
3233 event.u.mlme.status = MLME_DENIED;
3234 event.u.mlme.reason = status_code;
3235 drv_event_callback(sdata->local, sdata, &event);
3237 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3238 /* oops -- internal error -- send timeout for now */
3239 ieee80211_destroy_assoc_data(sdata, false, false);
3240 cfg80211_assoc_timeout(sdata->dev, bss);
3243 event.u.mlme.status = MLME_SUCCESS;
3244 drv_event_callback(sdata->local, sdata, &event);
3245 sdata_info(sdata, "associated\n");
3248 * destroy assoc_data afterwards, as otherwise an idle
3249 * recalc after assoc_data is NULL but before associated
3250 * is set can cause the interface to go idle
3252 ieee80211_destroy_assoc_data(sdata, true, false);
3254 /* get uapsd queues configuration */
3256 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3257 if (sdata->tx_conf[ac].uapsd)
3258 uapsd_queues |= BIT(ac);
3261 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3264 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3265 struct ieee80211_mgmt *mgmt, size_t len,
3266 struct ieee80211_rx_status *rx_status,
3267 struct ieee802_11_elems *elems)
3269 struct ieee80211_local *local = sdata->local;
3270 struct ieee80211_bss *bss;
3271 struct ieee80211_channel *channel;
3273 sdata_assert_lock(sdata);
3275 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3279 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3282 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3283 ieee80211_rx_bss_put(local, bss);
3288 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3289 struct sk_buff *skb)
3291 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3292 struct ieee80211_if_managed *ifmgd;
3293 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3294 size_t baselen, len = skb->len;
3295 struct ieee802_11_elems elems;
3297 ifmgd = &sdata->u.mgd;
3299 sdata_assert_lock(sdata);
3301 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3302 return; /* ignore ProbeResp to foreign address */
3304 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3308 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3311 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3313 if (ifmgd->associated &&
3314 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3315 ieee80211_reset_ap_probe(sdata);
3319 * This is the canonical list of information elements we care about,
3320 * the filter code also gives us all changes to the Microsoft OUI
3321 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3322 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3323 * changes to requested client power.
3325 * We implement beacon filtering in software since that means we can
3326 * avoid processing the frame here and in cfg80211, and userspace
3327 * will not be able to tell whether the hardware supports it or not.
3329 * XXX: This list needs to be dynamic -- userspace needs to be able to
3330 * add items it requires. It also needs to be able to tell us to
3331 * look out for other vendor IEs.
3333 static const u64 care_about_ies =
3334 (1ULL << WLAN_EID_COUNTRY) |
3335 (1ULL << WLAN_EID_ERP_INFO) |
3336 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3337 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3338 (1ULL << WLAN_EID_HT_CAPABILITY) |
3339 (1ULL << WLAN_EID_HT_OPERATION) |
3340 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3342 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3343 struct ieee80211_mgmt *mgmt, size_t len,
3344 struct ieee80211_rx_status *rx_status)
3346 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3347 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3349 struct ieee802_11_elems elems;
3350 struct ieee80211_local *local = sdata->local;
3351 struct ieee80211_chanctx_conf *chanctx_conf;
3352 struct ieee80211_channel *chan;
3353 struct sta_info *sta;
3359 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3361 sdata_assert_lock(sdata);
3363 /* Process beacon from the current BSS */
3364 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3369 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3370 if (!chanctx_conf) {
3375 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3379 chan = chanctx_conf->def.chan;
3382 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3383 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3384 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3385 len - baselen, false, &elems);
3387 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3388 if (elems.tim && !elems.parse_error) {
3389 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3390 ifmgd->dtim_period = tim_ie->dtim_period;
3392 ifmgd->have_beacon = true;
3393 ifmgd->assoc_data->need_beacon = false;
3394 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3395 sdata->vif.bss_conf.sync_tsf =
3396 le64_to_cpu(mgmt->u.beacon.timestamp);
3397 sdata->vif.bss_conf.sync_device_ts =
3398 rx_status->device_timestamp;
3400 sdata->vif.bss_conf.sync_dtim_count =
3401 elems.tim->dtim_count;
3403 sdata->vif.bss_conf.sync_dtim_count = 0;
3405 /* continue assoc process */
3406 ifmgd->assoc_data->timeout = jiffies;
3407 ifmgd->assoc_data->timeout_started = true;
3408 run_again(sdata, ifmgd->assoc_data->timeout);
3412 if (!ifmgd->associated ||
3413 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3415 bssid = ifmgd->associated->bssid;
3417 /* Track average RSSI from the Beacon frames of the current AP */
3418 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3419 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3420 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3421 ifmgd->last_cqm_event_signal = 0;
3422 ifmgd->count_beacon_signal = 1;
3423 ifmgd->last_ave_beacon_signal = 0;
3425 ifmgd->count_beacon_signal++;
3428 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3430 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3431 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3432 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3433 int last_sig = ifmgd->last_ave_beacon_signal;
3434 struct ieee80211_event event = {
3439 * if signal crosses either of the boundaries, invoke callback
3440 * with appropriate parameters
3442 if (sig > ifmgd->rssi_max_thold &&
3443 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3444 ifmgd->last_ave_beacon_signal = sig;
3445 event.u.rssi.data = RSSI_EVENT_HIGH;
3446 drv_event_callback(local, sdata, &event);
3447 } else if (sig < ifmgd->rssi_min_thold &&
3448 (last_sig >= ifmgd->rssi_max_thold ||
3450 ifmgd->last_ave_beacon_signal = sig;
3451 event.u.rssi.data = RSSI_EVENT_LOW;
3452 drv_event_callback(local, sdata, &event);
3456 if (bss_conf->cqm_rssi_thold &&
3457 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3458 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3459 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3460 int last_event = ifmgd->last_cqm_event_signal;
3461 int thold = bss_conf->cqm_rssi_thold;
3462 int hyst = bss_conf->cqm_rssi_hyst;
3465 (last_event == 0 || sig < last_event - hyst)) {
3466 ifmgd->last_cqm_event_signal = sig;
3467 ieee80211_cqm_rssi_notify(
3469 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3471 } else if (sig > thold &&
3472 (last_event == 0 || sig > last_event + hyst)) {
3473 ifmgd->last_cqm_event_signal = sig;
3474 ieee80211_cqm_rssi_notify(
3476 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3481 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3482 mlme_dbg_ratelimited(sdata,
3483 "cancelling AP probe due to a received beacon\n");
3484 ieee80211_reset_ap_probe(sdata);
3488 * Push the beacon loss detection into the future since
3489 * we are processing a beacon from the AP just now.
3491 ieee80211_sta_reset_beacon_monitor(sdata);
3493 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3494 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3495 len - baselen, false, &elems,
3496 care_about_ies, ncrc);
3498 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3499 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3500 if (local->hw.conf.dynamic_ps_timeout > 0) {
3501 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3502 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3503 ieee80211_hw_config(local,
3504 IEEE80211_CONF_CHANGE_PS);
3506 ieee80211_send_nullfunc(local, sdata, false);
3507 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3508 local->pspolling = true;
3511 * Here is assumed that the driver will be
3512 * able to send ps-poll frame and receive a
3513 * response even though power save mode is
3514 * enabled, but some drivers might require
3515 * to disable power save here. This needs
3516 * to be investigated.
3518 ieee80211_send_pspoll(local, sdata);
3522 if (sdata->vif.p2p) {
3523 struct ieee80211_p2p_noa_attr noa = {};
3526 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3528 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3529 (u8 *) &noa, sizeof(noa));
3531 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3532 /* valid noa_attr and index changed */
3533 sdata->u.mgd.p2p_noa_index = noa.index;
3534 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3535 changed |= BSS_CHANGED_P2P_PS;
3537 * make sure we update all information, the CRC
3538 * mechanism doesn't look at P2P attributes.
3540 ifmgd->beacon_crc_valid = false;
3542 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3543 /* noa_attr not found and we had valid noa_attr before */
3544 sdata->u.mgd.p2p_noa_index = -1;
3545 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3546 changed |= BSS_CHANGED_P2P_PS;
3547 ifmgd->beacon_crc_valid = false;
3551 if (ifmgd->csa_waiting_bcn)
3552 ieee80211_chswitch_post_beacon(sdata);
3555 * Update beacon timing and dtim count on every beacon appearance. This
3556 * will allow the driver to use the most updated values. Do it before
3557 * comparing this one with last received beacon.
3558 * IMPORTANT: These parameters would possibly be out of sync by the time
3559 * the driver will use them. The synchronized view is currently
3560 * guaranteed only in certain callbacks.
3562 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3563 sdata->vif.bss_conf.sync_tsf =
3564 le64_to_cpu(mgmt->u.beacon.timestamp);
3565 sdata->vif.bss_conf.sync_device_ts =
3566 rx_status->device_timestamp;
3568 sdata->vif.bss_conf.sync_dtim_count =
3569 elems.tim->dtim_count;
3571 sdata->vif.bss_conf.sync_dtim_count = 0;
3574 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3576 ifmgd->beacon_crc = ncrc;
3577 ifmgd->beacon_crc_valid = true;
3579 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3581 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3582 rx_status->device_timestamp,
3585 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3586 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3587 elems.wmm_param_len))
3588 changed |= BSS_CHANGED_QOS;
3591 * If we haven't had a beacon before, tell the driver about the
3592 * DTIM period (and beacon timing if desired) now.
3594 if (!ifmgd->have_beacon) {
3595 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3597 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3599 bss_conf->dtim_period = 1;
3601 changed |= BSS_CHANGED_BEACON_INFO;
3602 ifmgd->have_beacon = true;
3604 mutex_lock(&local->iflist_mtx);
3605 ieee80211_recalc_ps(local);
3606 mutex_unlock(&local->iflist_mtx);
3608 ieee80211_recalc_ps_vif(sdata);
3611 if (elems.erp_info) {
3613 erp_value = elems.erp_info[0];
3617 changed |= ieee80211_handle_bss_capability(sdata,
3618 le16_to_cpu(mgmt->u.beacon.capab_info),
3619 erp_valid, erp_value);
3621 mutex_lock(&local->sta_mtx);
3622 sta = sta_info_get(sdata, bssid);
3624 if (ieee80211_config_bw(sdata, sta,
3625 elems.ht_cap_elem, elems.ht_operation,
3626 elems.vht_operation, bssid, &changed)) {
3627 mutex_unlock(&local->sta_mtx);
3628 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3629 WLAN_REASON_DEAUTH_LEAVING,
3631 ieee80211_report_disconnect(sdata, deauth_buf,
3632 sizeof(deauth_buf), true,
3633 WLAN_REASON_DEAUTH_LEAVING);
3637 if (sta && elems.opmode_notif)
3638 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3640 mutex_unlock(&local->sta_mtx);
3642 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3644 elems.country_elem_len,
3645 elems.pwr_constr_elem,
3646 elems.cisco_dtpc_elem);
3648 ieee80211_bss_info_change_notify(sdata, changed);
3651 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3652 struct sk_buff *skb)
3654 struct ieee80211_rx_status *rx_status;
3655 struct ieee80211_mgmt *mgmt;
3657 struct ieee802_11_elems elems;
3660 rx_status = (struct ieee80211_rx_status *) skb->cb;
3661 mgmt = (struct ieee80211_mgmt *) skb->data;
3662 fc = le16_to_cpu(mgmt->frame_control);
3666 switch (fc & IEEE80211_FCTL_STYPE) {
3667 case IEEE80211_STYPE_BEACON:
3668 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3670 case IEEE80211_STYPE_PROBE_RESP:
3671 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3673 case IEEE80211_STYPE_AUTH:
3674 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3676 case IEEE80211_STYPE_DEAUTH:
3677 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3679 case IEEE80211_STYPE_DISASSOC:
3680 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3682 case IEEE80211_STYPE_ASSOC_RESP:
3683 case IEEE80211_STYPE_REASSOC_RESP:
3684 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3686 case IEEE80211_STYPE_ACTION:
3687 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3688 ies_len = skb->len -
3689 offsetof(struct ieee80211_mgmt,
3690 u.action.u.chan_switch.variable);
3695 ieee802_11_parse_elems(
3696 mgmt->u.action.u.chan_switch.variable,
3697 ies_len, true, &elems);
3699 if (elems.parse_error)
3702 ieee80211_sta_process_chanswitch(sdata,
3704 rx_status->device_timestamp,
3706 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3707 ies_len = skb->len -
3708 offsetof(struct ieee80211_mgmt,
3709 u.action.u.ext_chan_switch.variable);
3714 ieee802_11_parse_elems(
3715 mgmt->u.action.u.ext_chan_switch.variable,
3716 ies_len, true, &elems);
3718 if (elems.parse_error)
3721 /* for the handling code pretend this was also an IE */
3722 elems.ext_chansw_ie =
3723 &mgmt->u.action.u.ext_chan_switch.data;
3725 ieee80211_sta_process_chanswitch(sdata,
3727 rx_status->device_timestamp,
3732 sdata_unlock(sdata);
3735 static void ieee80211_sta_timer(unsigned long data)
3737 struct ieee80211_sub_if_data *sdata =
3738 (struct ieee80211_sub_if_data *) data;
3740 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3743 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3744 u8 *bssid, u8 reason, bool tx)
3746 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3748 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3751 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3755 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3757 struct ieee80211_local *local = sdata->local;
3758 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3759 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3764 sdata_assert_lock(sdata);
3766 if (WARN_ON_ONCE(!auth_data))
3771 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3772 sdata_info(sdata, "authentication with %pM timed out\n",
3773 auth_data->bss->bssid);
3776 * Most likely AP is not in the range so remove the
3777 * bss struct for that AP.
3779 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3784 drv_mgd_prepare_tx(local, sdata);
3786 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3787 auth_data->bss->bssid, auth_data->tries,
3788 IEEE80211_AUTH_MAX_TRIES);
3790 auth_data->expected_transaction = 2;
3792 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3793 trans = auth_data->sae_trans;
3794 status = auth_data->sae_status;
3795 auth_data->expected_transaction = trans;
3798 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3799 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3800 IEEE80211_TX_INTFL_MLME_CONN_TX;
3802 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3803 auth_data->data, auth_data->data_len,
3804 auth_data->bss->bssid,
3805 auth_data->bss->bssid, NULL, 0, 0,
3808 if (tx_flags == 0) {
3809 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3810 auth_data->timeout_started = true;
3811 run_again(sdata, auth_data->timeout);
3813 auth_data->timeout =
3814 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3815 auth_data->timeout_started = true;
3816 run_again(sdata, auth_data->timeout);
3822 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3824 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3825 struct ieee80211_local *local = sdata->local;
3827 sdata_assert_lock(sdata);
3829 assoc_data->tries++;
3830 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3831 sdata_info(sdata, "association with %pM timed out\n",
3832 assoc_data->bss->bssid);
3835 * Most likely AP is not in the range so remove the
3836 * bss struct for that AP.
3838 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3843 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3844 assoc_data->bss->bssid, assoc_data->tries,
3845 IEEE80211_ASSOC_MAX_TRIES);
3846 ieee80211_send_assoc(sdata);
3848 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3849 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3850 assoc_data->timeout_started = true;
3851 run_again(sdata, assoc_data->timeout);
3853 assoc_data->timeout =
3854 round_jiffies_up(jiffies +
3855 IEEE80211_ASSOC_TIMEOUT_LONG);
3856 assoc_data->timeout_started = true;
3857 run_again(sdata, assoc_data->timeout);
3863 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3864 __le16 fc, bool acked)
3866 struct ieee80211_local *local = sdata->local;
3868 sdata->u.mgd.status_fc = fc;
3869 sdata->u.mgd.status_acked = acked;
3870 sdata->u.mgd.status_received = true;
3872 ieee80211_queue_work(&local->hw, &sdata->work);
3875 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3877 struct ieee80211_local *local = sdata->local;
3878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3882 if (ifmgd->status_received) {
3883 __le16 fc = ifmgd->status_fc;
3884 bool status_acked = ifmgd->status_acked;
3886 ifmgd->status_received = false;
3887 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3889 ifmgd->auth_data->timeout =
3890 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3891 run_again(sdata, ifmgd->auth_data->timeout);
3893 ifmgd->auth_data->timeout = jiffies - 1;
3895 ifmgd->auth_data->timeout_started = true;
3896 } else if (ifmgd->assoc_data &&
3897 (ieee80211_is_assoc_req(fc) ||
3898 ieee80211_is_reassoc_req(fc))) {
3900 ifmgd->assoc_data->timeout =
3901 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3902 run_again(sdata, ifmgd->assoc_data->timeout);
3904 ifmgd->assoc_data->timeout = jiffies - 1;
3906 ifmgd->assoc_data->timeout_started = true;
3910 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3911 time_after(jiffies, ifmgd->auth_data->timeout)) {
3912 if (ifmgd->auth_data->done) {
3914 * ok ... we waited for assoc but userspace didn't,
3915 * so let's just kill the auth data
3917 ieee80211_destroy_auth_data(sdata, false);
3918 } else if (ieee80211_auth(sdata)) {
3920 struct ieee80211_event event = {
3922 .u.mlme.data = AUTH_EVENT,
3923 .u.mlme.status = MLME_TIMEOUT,
3926 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3928 ieee80211_destroy_auth_data(sdata, false);
3930 cfg80211_auth_timeout(sdata->dev, bssid);
3931 drv_event_callback(sdata->local, sdata, &event);
3933 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3934 run_again(sdata, ifmgd->auth_data->timeout);
3936 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3937 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3938 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3939 ieee80211_do_assoc(sdata)) {
3940 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3941 struct ieee80211_event event = {
3943 .u.mlme.data = ASSOC_EVENT,
3944 .u.mlme.status = MLME_TIMEOUT,
3947 ieee80211_destroy_assoc_data(sdata, false, false);
3948 cfg80211_assoc_timeout(sdata->dev, bss);
3949 drv_event_callback(sdata->local, sdata, &event);
3951 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3952 run_again(sdata, ifmgd->assoc_data->timeout);
3954 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3955 ifmgd->associated) {
3959 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3961 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3962 max_tries = max_nullfunc_tries;
3964 max_tries = max_probe_tries;
3966 /* ACK received for nullfunc probing frame */
3967 if (!ifmgd->probe_send_count)
3968 ieee80211_reset_ap_probe(sdata);
3969 else if (ifmgd->nullfunc_failed) {
3970 if (ifmgd->probe_send_count < max_tries) {
3972 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3973 bssid, ifmgd->probe_send_count,
3975 ieee80211_mgd_probe_ap_send(sdata);
3978 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3980 ieee80211_sta_connection_lost(sdata, bssid,
3981 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3984 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3985 run_again(sdata, ifmgd->probe_timeout);
3986 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3988 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3989 bssid, probe_wait_ms);
3990 ieee80211_sta_connection_lost(sdata, bssid,
3991 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3992 } else if (ifmgd->probe_send_count < max_tries) {
3994 "No probe response from AP %pM after %dms, try %d/%i\n",
3995 bssid, probe_wait_ms,
3996 ifmgd->probe_send_count, max_tries);
3997 ieee80211_mgd_probe_ap_send(sdata);
4000 * We actually lost the connection ... or did we?
4003 wiphy_debug(local->hw.wiphy,
4004 "%s: No probe response from AP %pM"
4005 " after %dms, disconnecting.\n",
4007 bssid, probe_wait_ms);
4009 ieee80211_sta_connection_lost(sdata, bssid,
4010 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4014 sdata_unlock(sdata);
4017 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4019 struct ieee80211_sub_if_data *sdata =
4020 (struct ieee80211_sub_if_data *) data;
4021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4023 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4026 sdata->u.mgd.connection_loss = false;
4027 ieee80211_queue_work(&sdata->local->hw,
4028 &sdata->u.mgd.beacon_connection_loss_work);
4031 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4033 struct ieee80211_sub_if_data *sdata =
4034 (struct ieee80211_sub_if_data *) data;
4035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4036 struct ieee80211_local *local = sdata->local;
4038 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4041 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4044 static void ieee80211_sta_monitor_work(struct work_struct *work)
4046 struct ieee80211_sub_if_data *sdata =
4047 container_of(work, struct ieee80211_sub_if_data,
4048 u.mgd.monitor_work);
4050 ieee80211_mgd_probe_ap(sdata, false);
4053 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4055 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4056 __ieee80211_stop_poll(sdata);
4058 /* let's probe the connection once */
4059 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4060 ieee80211_queue_work(&sdata->local->hw,
4061 &sdata->u.mgd.monitor_work);
4066 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4069 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4073 if (ifmgd->auth_data || ifmgd->assoc_data) {
4074 const u8 *bssid = ifmgd->auth_data ?
4075 ifmgd->auth_data->bss->bssid :
4076 ifmgd->assoc_data->bss->bssid;
4079 * If we are trying to authenticate / associate while suspending,
4080 * cfg80211 won't know and won't actually abort those attempts,
4081 * thus we need to do that ourselves.
4083 ieee80211_send_deauth_disassoc(sdata, bssid,
4084 IEEE80211_STYPE_DEAUTH,
4085 WLAN_REASON_DEAUTH_LEAVING,
4087 if (ifmgd->assoc_data)
4088 ieee80211_destroy_assoc_data(sdata, false, true);
4089 if (ifmgd->auth_data)
4090 ieee80211_destroy_auth_data(sdata, false);
4091 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4092 IEEE80211_DEAUTH_FRAME_LEN);
4095 /* This is a bit of a hack - we should find a better and more generic
4096 * solution to this. Normally when suspending, cfg80211 will in fact
4097 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4098 * auth (not so important) or assoc (this is the problem) process.
4100 * As a consequence, it can happen that we are in the process of both
4101 * associating and suspending, and receive an association response
4102 * after cfg80211 has checked if it needs to disconnect, but before
4103 * we actually set the flag to drop incoming frames. This will then
4104 * cause the workqueue flush to process the association response in
4105 * the suspend, resulting in a successful association just before it
4106 * tries to remove the interface from the driver, which now though
4107 * has a channel context assigned ... this results in issues.
4109 * To work around this (for now) simply deauth here again if we're
4112 if (ifmgd->associated && !sdata->local->wowlan) {
4114 struct cfg80211_deauth_request req = {
4115 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4119 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4120 ieee80211_mgd_deauth(sdata, &req);
4123 sdata_unlock(sdata);
4126 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4128 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4131 if (!ifmgd->associated) {
4132 sdata_unlock(sdata);
4136 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4137 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4138 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4139 ieee80211_sta_connection_lost(sdata,
4140 ifmgd->associated->bssid,
4141 WLAN_REASON_UNSPECIFIED,
4143 sdata_unlock(sdata);
4146 sdata_unlock(sdata);
4150 /* interface setup */
4151 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4153 struct ieee80211_if_managed *ifmgd;
4155 ifmgd = &sdata->u.mgd;
4156 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4157 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4158 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4159 ieee80211_beacon_connection_loss_work);
4160 INIT_WORK(&ifmgd->csa_connection_drop_work,
4161 ieee80211_csa_connection_drop_work);
4162 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4163 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4164 ieee80211_tdls_peer_del_work);
4165 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4166 (unsigned long) sdata);
4167 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4168 (unsigned long) sdata);
4169 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4170 (unsigned long) sdata);
4171 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4172 (unsigned long) sdata);
4173 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4174 ieee80211_sta_handle_tspec_ac_params_wk);
4177 ifmgd->powersave = sdata->wdev.ps;
4178 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4179 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4180 ifmgd->p2p_noa_index = -1;
4182 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4183 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4185 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4187 /* Setup TDLS data */
4188 spin_lock_init(&ifmgd->teardown_lock);
4189 ifmgd->teardown_skb = NULL;
4190 ifmgd->orig_teardown_skb = NULL;
4193 /* scan finished notification */
4194 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4196 struct ieee80211_sub_if_data *sdata;
4198 /* Restart STA timers */
4200 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4201 if (ieee80211_sdata_running(sdata))
4202 ieee80211_restart_sta_timer(sdata);
4207 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4208 struct cfg80211_bss *cbss)
4210 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4211 const u8 *ht_cap_ie, *vht_cap_ie;
4212 const struct ieee80211_ht_cap *ht_cap;
4213 const struct ieee80211_vht_cap *vht_cap;
4216 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4219 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4220 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4221 ht_cap = (void *)(ht_cap_ie + 2);
4222 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4224 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4225 * "Tx Unequal Modulation Supported" fields.
4229 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4232 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4233 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4237 vht_cap = (void *)(vht_cap_ie + 2);
4238 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4239 for (nss = 8; nss > 0; nss--) {
4240 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4241 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4244 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4245 chains = max(chains, nss);
4251 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4252 struct cfg80211_bss *cbss)
4254 struct ieee80211_local *local = sdata->local;
4255 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4256 const struct ieee80211_ht_cap *ht_cap = NULL;
4257 const struct ieee80211_ht_operation *ht_oper = NULL;
4258 const struct ieee80211_vht_operation *vht_oper = NULL;
4259 struct ieee80211_supported_band *sband;
4260 struct cfg80211_chan_def chandef;
4265 sband = local->hw.wiphy->bands[cbss->channel->band];
4267 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4268 IEEE80211_STA_DISABLE_80P80MHZ |
4269 IEEE80211_STA_DISABLE_160MHZ);
4273 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4274 sband->ht_cap.ht_supported) {
4275 const u8 *ht_oper_ie, *ht_cap_ie;
4277 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4278 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4279 ht_oper = (void *)(ht_oper_ie + 2);
4281 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4282 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4283 ht_cap = (void *)(ht_cap_ie + 2);
4286 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4291 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4292 sband->vht_cap.vht_supported) {
4293 const u8 *vht_oper_ie, *vht_cap;
4295 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4296 WLAN_EID_VHT_OPERATION);
4297 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4298 vht_oper = (void *)(vht_oper_ie + 2);
4299 if (vht_oper && !ht_oper) {
4302 "AP advertised VHT without HT, disabling both\n");
4303 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4304 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4307 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4308 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4309 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4314 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4316 for (i = 0; i < sband->n_channels; i++) {
4317 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4318 IEEE80211_CHAN_NO_80MHZ))
4326 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4328 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4330 ht_cap, ht_oper, vht_oper,
4333 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4338 /* will change later if needed */
4339 sdata->smps_mode = IEEE80211_SMPS_OFF;
4341 mutex_lock(&local->mtx);
4343 * If this fails (possibly due to channel context sharing
4344 * on incompatible channels, e.g. 80+80 and 160 sharing the
4345 * same control channel) try to use a smaller bandwidth.
4347 ret = ieee80211_vif_use_channel(sdata, &chandef,
4348 IEEE80211_CHANCTX_SHARED);
4350 /* don't downgrade for 5 and 10 MHz channels, though. */
4351 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4352 chandef.width == NL80211_CHAN_WIDTH_10)
4355 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4356 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4357 ret = ieee80211_vif_use_channel(sdata, &chandef,
4358 IEEE80211_CHANCTX_SHARED);
4361 mutex_unlock(&local->mtx);
4365 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4366 struct cfg80211_bss *cbss, bool assoc,
4369 struct ieee80211_local *local = sdata->local;
4370 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4371 struct ieee80211_bss *bss = (void *)cbss->priv;
4372 struct sta_info *new_sta = NULL;
4373 struct ieee80211_supported_band *sband;
4374 bool have_sta = false;
4377 sband = local->hw.wiphy->bands[cbss->channel->band];
4379 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4382 /* If a reconfig is happening, bail out */
4383 if (local->in_reconfig)
4388 have_sta = sta_info_get(sdata, cbss->bssid);
4393 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4398 if (new_sta || override) {
4399 err = ieee80211_prep_channel(sdata, cbss);
4402 sta_info_free(local, new_sta);
4408 u32 rates = 0, basic_rates = 0;
4409 bool have_higher_than_11mbit;
4410 int min_rate = INT_MAX, min_rate_index = -1;
4411 struct ieee80211_chanctx_conf *chanctx_conf;
4412 const struct cfg80211_bss_ies *ies;
4413 int shift = ieee80211_vif_get_shift(&sdata->vif);
4417 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4418 if (WARN_ON(!chanctx_conf)) {
4420 sta_info_free(local, new_sta);
4423 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4426 ieee80211_get_rates(sband, bss->supp_rates,
4427 bss->supp_rates_len,
4428 &rates, &basic_rates,
4429 &have_higher_than_11mbit,
4430 &min_rate, &min_rate_index,
4434 * This used to be a workaround for basic rates missing
4435 * in the association response frame. Now that we no
4436 * longer use the basic rates from there, it probably
4437 * doesn't happen any more, but keep the workaround so
4438 * in case some *other* APs are buggy in different ways
4439 * we can connect -- with a warning.
4441 if (!basic_rates && min_rate_index >= 0) {
4443 "No basic rates, using min rate instead\n");
4444 basic_rates = BIT(min_rate_index);
4447 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4448 sdata->vif.bss_conf.basic_rates = basic_rates;
4450 /* cf. IEEE 802.11 9.2.12 */
4451 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4452 have_higher_than_11mbit)
4453 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4455 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4457 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4459 /* set timing information */
4460 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4462 ies = rcu_dereference(cbss->beacon_ies);
4466 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4467 sdata->vif.bss_conf.sync_device_ts =
4468 bss->device_ts_beacon;
4469 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4470 ies->data, ies->len);
4471 if (tim_ie && tim_ie[1] >= 2)
4472 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4474 sdata->vif.bss_conf.sync_dtim_count = 0;
4475 } else if (!ieee80211_hw_check(&sdata->local->hw,
4476 TIMING_BEACON_ONLY)) {
4477 ies = rcu_dereference(cbss->proberesp_ies);
4478 /* must be non-NULL since beacon IEs were NULL */
4479 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4480 sdata->vif.bss_conf.sync_device_ts =
4481 bss->device_ts_presp;
4482 sdata->vif.bss_conf.sync_dtim_count = 0;
4484 sdata->vif.bss_conf.sync_tsf = 0;
4485 sdata->vif.bss_conf.sync_device_ts = 0;
4486 sdata->vif.bss_conf.sync_dtim_count = 0;
4490 /* tell driver about BSSID, basic rates and timing */
4491 ieee80211_bss_info_change_notify(sdata,
4492 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4493 BSS_CHANGED_BEACON_INT);
4496 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4498 err = sta_info_insert(new_sta);
4502 "failed to insert STA entry for the AP (error %d)\n",
4507 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4509 /* Cancel scan to ensure that nothing interferes with connection */
4510 if (local->scanning)
4511 ieee80211_scan_cancel(local);
4517 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4518 struct cfg80211_auth_request *req)
4520 struct ieee80211_local *local = sdata->local;
4521 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4522 struct ieee80211_mgd_auth_data *auth_data;
4526 /* prepare auth data structure */
4528 switch (req->auth_type) {
4529 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4530 auth_alg = WLAN_AUTH_OPEN;
4532 case NL80211_AUTHTYPE_SHARED_KEY:
4533 if (IS_ERR(local->wep_tx_tfm))
4535 auth_alg = WLAN_AUTH_SHARED_KEY;
4537 case NL80211_AUTHTYPE_FT:
4538 auth_alg = WLAN_AUTH_FT;
4540 case NL80211_AUTHTYPE_NETWORK_EAP:
4541 auth_alg = WLAN_AUTH_LEAP;
4543 case NL80211_AUTHTYPE_SAE:
4544 auth_alg = WLAN_AUTH_SAE;
4550 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4551 req->ie_len, GFP_KERNEL);
4555 auth_data->bss = req->bss;
4557 if (req->auth_data_len >= 4) {
4558 __le16 *pos = (__le16 *) req->auth_data;
4559 auth_data->sae_trans = le16_to_cpu(pos[0]);
4560 auth_data->sae_status = le16_to_cpu(pos[1]);
4561 memcpy(auth_data->data, req->auth_data + 4,
4562 req->auth_data_len - 4);
4563 auth_data->data_len += req->auth_data_len - 4;
4566 if (req->ie && req->ie_len) {
4567 memcpy(&auth_data->data[auth_data->data_len],
4568 req->ie, req->ie_len);
4569 auth_data->data_len += req->ie_len;
4572 if (req->key && req->key_len) {
4573 auth_data->key_len = req->key_len;
4574 auth_data->key_idx = req->key_idx;
4575 memcpy(auth_data->key, req->key, req->key_len);
4578 auth_data->algorithm = auth_alg;
4580 /* try to authenticate/probe */
4582 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4583 ifmgd->assoc_data) {
4588 if (ifmgd->auth_data)
4589 ieee80211_destroy_auth_data(sdata, false);
4591 /* prep auth_data so we don't go into idle on disassoc */
4592 ifmgd->auth_data = auth_data;
4594 if (ifmgd->associated) {
4595 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4597 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4598 WLAN_REASON_UNSPECIFIED,
4601 ieee80211_report_disconnect(sdata, frame_buf,
4602 sizeof(frame_buf), true,
4603 WLAN_REASON_UNSPECIFIED);
4606 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4608 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4612 err = ieee80211_auth(sdata);
4614 sta_info_destroy_addr(sdata, req->bss->bssid);
4618 /* hold our own reference */
4619 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4623 eth_zero_addr(ifmgd->bssid);
4624 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4625 ifmgd->auth_data = NULL;
4626 mutex_lock(&sdata->local->mtx);
4627 ieee80211_vif_release_channel(sdata);
4628 mutex_unlock(&sdata->local->mtx);
4634 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4635 struct cfg80211_assoc_request *req)
4637 struct ieee80211_local *local = sdata->local;
4638 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4639 struct ieee80211_bss *bss = (void *)req->bss->priv;
4640 struct ieee80211_mgd_assoc_data *assoc_data;
4641 const struct cfg80211_bss_ies *beacon_ies;
4642 struct ieee80211_supported_band *sband;
4643 const u8 *ssidie, *ht_ie, *vht_ie;
4645 bool override = false;
4647 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4652 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4658 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4659 assoc_data->ssid_len = ssidie[1];
4662 if (ifmgd->associated) {
4663 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4665 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4666 WLAN_REASON_UNSPECIFIED,
4669 ieee80211_report_disconnect(sdata, frame_buf,
4670 sizeof(frame_buf), true,
4671 WLAN_REASON_UNSPECIFIED);
4674 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4679 if (ifmgd->assoc_data) {
4684 if (ifmgd->auth_data) {
4687 /* keep sta info, bssid if matching */
4688 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4689 ieee80211_destroy_auth_data(sdata, match);
4692 /* prepare assoc data */
4694 ifmgd->beacon_crc_valid = false;
4696 assoc_data->wmm = bss->wmm_used &&
4697 (local->hw.queues >= IEEE80211_NUM_ACS);
4700 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4701 * We still associate in non-HT mode (11a/b/g) if any one of these
4702 * ciphers is configured as pairwise.
4703 * We can set this to true for non-11n hardware, that'll be checked
4704 * separately along with the peer capabilities.
4706 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4707 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4708 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4709 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4710 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4711 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4712 netdev_info(sdata->dev,
4713 "disabling HT/VHT due to WEP/TKIP use\n");
4717 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4718 sband = local->hw.wiphy->bands[req->bss->channel->band];
4719 if (!sband->ht_cap.ht_supported ||
4720 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4721 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4722 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4723 if (!bss->wmm_used &&
4724 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4725 netdev_info(sdata->dev,
4726 "disabling HT as WMM/QoS is not supported by the AP\n");
4729 /* disable VHT if we don't support it or the AP doesn't use WMM */
4730 if (!sband->vht_cap.vht_supported ||
4731 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4732 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4733 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4734 if (!bss->wmm_used &&
4735 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4736 netdev_info(sdata->dev,
4737 "disabling VHT as WMM/QoS is not supported by the AP\n");
4740 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4741 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4742 sizeof(ifmgd->ht_capa_mask));
4744 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4745 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4746 sizeof(ifmgd->vht_capa_mask));
4748 if (req->ie && req->ie_len) {
4749 memcpy(assoc_data->ie, req->ie, req->ie_len);
4750 assoc_data->ie_len = req->ie_len;
4753 assoc_data->bss = req->bss;
4755 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4756 if (ifmgd->powersave)
4757 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4759 sdata->smps_mode = IEEE80211_SMPS_OFF;
4761 sdata->smps_mode = ifmgd->req_smps;
4763 assoc_data->capability = req->bss->capability;
4764 assoc_data->supp_rates = bss->supp_rates;
4765 assoc_data->supp_rates_len = bss->supp_rates_len;
4768 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4769 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4770 assoc_data->ap_ht_param =
4771 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4773 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4774 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4775 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4776 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4777 sizeof(struct ieee80211_vht_cap));
4779 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4782 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4783 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4784 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4785 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4787 if (bss->wmm_used && bss->uapsd_supported &&
4788 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4789 assoc_data->uapsd = true;
4790 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4792 assoc_data->uapsd = false;
4793 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4796 if (req->prev_bssid)
4797 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4800 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4801 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4803 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4804 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4807 if (req->flags & ASSOC_REQ_USE_RRM)
4808 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4810 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4812 if (req->crypto.control_port)
4813 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4815 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4817 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4818 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4819 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4822 /* kick off associate process */
4824 ifmgd->assoc_data = assoc_data;
4825 ifmgd->dtim_period = 0;
4826 ifmgd->have_beacon = false;
4828 /* override HT/VHT configuration only if the AP and we support it */
4829 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4830 struct ieee80211_sta_ht_cap sta_ht_cap;
4832 if (req->flags & ASSOC_REQ_DISABLE_HT)
4835 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4836 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4838 /* check for 40 MHz disable override */
4839 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4840 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4841 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4844 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4845 req->flags & ASSOC_REQ_DISABLE_VHT)
4849 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4850 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4851 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4854 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4855 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4857 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4862 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4864 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4867 * Wait up to one beacon interval ...
4868 * should this be more if we miss one?
4870 sdata_info(sdata, "waiting for beacon from %pM\n",
4872 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4873 assoc_data->timeout_started = true;
4874 assoc_data->need_beacon = true;
4875 } else if (beacon_ies) {
4876 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4881 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4882 const struct ieee80211_tim_ie *tim;
4883 tim = (void *)(tim_ie + 2);
4884 ifmgd->dtim_period = tim->dtim_period;
4885 dtim_count = tim->dtim_count;
4887 ifmgd->have_beacon = true;
4888 assoc_data->timeout = jiffies;
4889 assoc_data->timeout_started = true;
4891 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4892 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4893 sdata->vif.bss_conf.sync_device_ts =
4894 bss->device_ts_beacon;
4895 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4898 assoc_data->timeout = jiffies;
4899 assoc_data->timeout_started = true;
4903 run_again(sdata, assoc_data->timeout);
4905 if (bss->corrupt_data) {
4906 char *corrupt_type = "data";
4907 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4908 if (bss->corrupt_data &
4909 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4910 corrupt_type = "beacon and probe response";
4912 corrupt_type = "beacon";
4913 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4914 corrupt_type = "probe response";
4915 sdata_info(sdata, "associating with AP with corrupt %s\n",
4921 eth_zero_addr(ifmgd->bssid);
4922 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4923 ifmgd->assoc_data = NULL;
4929 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4930 struct cfg80211_deauth_request *req)
4932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4933 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4934 bool tx = !req->local_state_change;
4936 if (ifmgd->auth_data &&
4937 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4939 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4940 req->bssid, req->reason_code,
4941 ieee80211_get_reason_code_string(req->reason_code));
4943 drv_mgd_prepare_tx(sdata->local, sdata);
4944 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4945 IEEE80211_STYPE_DEAUTH,
4946 req->reason_code, tx,
4948 ieee80211_destroy_auth_data(sdata, false);
4949 ieee80211_report_disconnect(sdata, frame_buf,
4950 sizeof(frame_buf), true,
4956 if (ifmgd->assoc_data &&
4957 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4959 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4960 req->bssid, req->reason_code,
4961 ieee80211_get_reason_code_string(req->reason_code));
4963 drv_mgd_prepare_tx(sdata->local, sdata);
4964 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4965 IEEE80211_STYPE_DEAUTH,
4966 req->reason_code, tx,
4968 ieee80211_destroy_assoc_data(sdata, false, true);
4969 ieee80211_report_disconnect(sdata, frame_buf,
4970 sizeof(frame_buf), true,
4975 if (ifmgd->associated &&
4976 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4978 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4979 req->bssid, req->reason_code,
4980 ieee80211_get_reason_code_string(req->reason_code));
4982 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4983 req->reason_code, tx, frame_buf);
4984 ieee80211_report_disconnect(sdata, frame_buf,
4985 sizeof(frame_buf), true,
4993 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4994 struct cfg80211_disassoc_request *req)
4996 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4998 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5001 * cfg80211 should catch this ... but it's racy since
5002 * we can receive a disassoc frame, process it, hand it
5003 * to cfg80211 while that's in a locked section already
5004 * trying to tell us that the user wants to disconnect.
5006 if (ifmgd->associated != req->bss)
5010 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5011 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5013 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5014 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5015 req->reason_code, !req->local_state_change,
5018 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5024 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5029 * Make sure some work items will not run after this,
5030 * they will not do anything but might not have been
5031 * cancelled when disconnecting.
5033 cancel_work_sync(&ifmgd->monitor_work);
5034 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5035 cancel_work_sync(&ifmgd->request_smps_work);
5036 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5037 cancel_work_sync(&ifmgd->chswitch_work);
5038 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5041 if (ifmgd->assoc_data) {
5042 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5043 ieee80211_destroy_assoc_data(sdata, false, false);
5044 cfg80211_assoc_timeout(sdata->dev, bss);
5046 if (ifmgd->auth_data)
5047 ieee80211_destroy_auth_data(sdata, false);
5048 spin_lock_bh(&ifmgd->teardown_lock);
5049 if (ifmgd->teardown_skb) {
5050 kfree_skb(ifmgd->teardown_skb);
5051 ifmgd->teardown_skb = NULL;
5052 ifmgd->orig_teardown_skb = NULL;
5054 spin_unlock_bh(&ifmgd->teardown_lock);
5055 del_timer_sync(&ifmgd->timer);
5056 sdata_unlock(sdata);
5059 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5060 enum nl80211_cqm_rssi_threshold_event rssi_event,
5063 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5065 trace_api_cqm_rssi_notify(sdata, rssi_event);
5067 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5069 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5071 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5073 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5075 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5077 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5079 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);