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) {
1025 * with multi-vif csa driver may call ieee80211_csa_finish()
1026 * many times while waiting for other interfaces to use their
1029 if (sdata->reserved_ready)
1032 ret = ieee80211_vif_use_reserved_context(sdata);
1035 "failed to use reserved channel context, disconnecting (err=%d)\n",
1037 ieee80211_queue_work(&sdata->local->hw,
1038 &ifmgd->csa_connection_drop_work);
1045 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1046 &sdata->csa_chandef)) {
1048 "failed to finalize channel switch, disconnecting\n");
1049 ieee80211_queue_work(&sdata->local->hw,
1050 &ifmgd->csa_connection_drop_work);
1054 /* XXX: shouldn't really modify cfg80211-owned data! */
1055 ifmgd->associated->channel = sdata->csa_chandef.chan;
1057 ifmgd->csa_waiting_bcn = true;
1059 ieee80211_sta_reset_beacon_monitor(sdata);
1060 ieee80211_sta_reset_conn_monitor(sdata);
1063 mutex_unlock(&local->chanctx_mtx);
1064 mutex_unlock(&local->mtx);
1065 sdata_unlock(sdata);
1068 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1070 struct ieee80211_local *local = sdata->local;
1071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1074 sdata_assert_lock(sdata);
1076 WARN_ON(!sdata->vif.csa_active);
1078 if (sdata->csa_block_tx) {
1079 ieee80211_wake_vif_queues(local, sdata,
1080 IEEE80211_QUEUE_STOP_REASON_CSA);
1081 sdata->csa_block_tx = false;
1084 sdata->vif.csa_active = false;
1085 ifmgd->csa_waiting_bcn = false;
1087 ret = drv_post_channel_switch(sdata);
1090 "driver post channel switch failed, disconnecting\n");
1091 ieee80211_queue_work(&local->hw,
1092 &ifmgd->csa_connection_drop_work);
1096 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1099 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1101 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1102 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1104 trace_api_chswitch_done(sdata, success);
1107 "driver channel switch failed, disconnecting\n");
1108 ieee80211_queue_work(&sdata->local->hw,
1109 &ifmgd->csa_connection_drop_work);
1111 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1114 EXPORT_SYMBOL(ieee80211_chswitch_done);
1116 static void ieee80211_chswitch_timer(unsigned long data)
1118 struct ieee80211_sub_if_data *sdata =
1119 (struct ieee80211_sub_if_data *) data;
1121 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1125 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1126 u64 timestamp, u32 device_timestamp,
1127 struct ieee802_11_elems *elems,
1130 struct ieee80211_local *local = sdata->local;
1131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1132 struct cfg80211_bss *cbss = ifmgd->associated;
1133 struct ieee80211_chanctx_conf *conf;
1134 struct ieee80211_chanctx *chanctx;
1135 enum ieee80211_band current_band;
1136 struct ieee80211_csa_ie csa_ie;
1137 struct ieee80211_channel_switch ch_switch;
1140 sdata_assert_lock(sdata);
1145 if (local->scanning)
1148 /* disregard subsequent announcements if we are already processing */
1149 if (sdata->vif.csa_active)
1152 current_band = cbss->channel->band;
1153 memset(&csa_ie, 0, sizeof(csa_ie));
1154 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1156 ifmgd->associated->bssid, &csa_ie);
1158 ieee80211_queue_work(&local->hw,
1159 &ifmgd->csa_connection_drop_work);
1163 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1164 IEEE80211_CHAN_DISABLED)) {
1166 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1167 ifmgd->associated->bssid,
1168 csa_ie.chandef.chan->center_freq,
1169 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1170 csa_ie.chandef.center_freq2);
1171 ieee80211_queue_work(&local->hw,
1172 &ifmgd->csa_connection_drop_work);
1176 if (cfg80211_chandef_identical(&csa_ie.chandef,
1177 &sdata->vif.bss_conf.chandef)) {
1178 if (ifmgd->csa_ignored_same_chan)
1181 "AP %pM tries to chanswitch to same channel, ignore\n",
1182 ifmgd->associated->bssid);
1183 ifmgd->csa_ignored_same_chan = true;
1188 * Drop all TDLS peers - either we disconnect or move to a different
1189 * channel from this point on. There's no telling what our peer will do.
1190 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1191 * have an incompatible wider chandef.
1193 ieee80211_teardown_tdls_peers(sdata);
1195 mutex_lock(&local->mtx);
1196 mutex_lock(&local->chanctx_mtx);
1197 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1198 lockdep_is_held(&local->chanctx_mtx));
1201 "no channel context assigned to vif?, disconnecting\n");
1202 goto drop_connection;
1205 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1207 if (local->use_chanctx &&
1208 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1210 "driver doesn't support chan-switch with channel contexts\n");
1211 goto drop_connection;
1214 ch_switch.timestamp = timestamp;
1215 ch_switch.device_timestamp = device_timestamp;
1216 ch_switch.block_tx = csa_ie.mode;
1217 ch_switch.chandef = csa_ie.chandef;
1218 ch_switch.count = csa_ie.count;
1220 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1222 "preparing for channel switch failed, disconnecting\n");
1223 goto drop_connection;
1226 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1227 chanctx->mode, false);
1230 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1232 goto drop_connection;
1234 mutex_unlock(&local->chanctx_mtx);
1236 sdata->vif.csa_active = true;
1237 sdata->csa_chandef = csa_ie.chandef;
1238 sdata->csa_block_tx = csa_ie.mode;
1239 ifmgd->csa_ignored_same_chan = false;
1241 if (sdata->csa_block_tx)
1242 ieee80211_stop_vif_queues(local, sdata,
1243 IEEE80211_QUEUE_STOP_REASON_CSA);
1244 mutex_unlock(&local->mtx);
1246 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1249 if (local->ops->channel_switch) {
1250 /* use driver's channel switch callback */
1251 drv_channel_switch(local, sdata, &ch_switch);
1255 /* channel switch handled in software */
1256 if (csa_ie.count <= 1)
1257 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1259 mod_timer(&ifmgd->chswitch_timer,
1260 TU_TO_EXP_TIME((csa_ie.count - 1) *
1261 cbss->beacon_interval));
1264 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1265 mutex_unlock(&local->chanctx_mtx);
1266 mutex_unlock(&local->mtx);
1270 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1271 struct ieee80211_channel *channel,
1272 const u8 *country_ie, u8 country_ie_len,
1273 const u8 *pwr_constr_elem,
1274 int *chan_pwr, int *pwr_reduction)
1276 struct ieee80211_country_ie_triplet *triplet;
1277 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1278 int i, chan_increment;
1279 bool have_chan_pwr = false;
1282 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1285 triplet = (void *)(country_ie + 3);
1286 country_ie_len -= 3;
1288 switch (channel->band) {
1292 case IEEE80211_BAND_2GHZ:
1293 case IEEE80211_BAND_60GHZ:
1296 case IEEE80211_BAND_5GHZ:
1302 while (country_ie_len >= 3) {
1303 u8 first_channel = triplet->chans.first_channel;
1305 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1308 for (i = 0; i < triplet->chans.num_channels; i++) {
1309 if (first_channel + i * chan_increment == chan) {
1310 have_chan_pwr = true;
1311 *chan_pwr = triplet->chans.max_power;
1320 country_ie_len -= 3;
1323 if (have_chan_pwr && pwr_constr_elem)
1324 *pwr_reduction = *pwr_constr_elem;
1328 return have_chan_pwr;
1331 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1332 struct ieee80211_channel *channel,
1333 const u8 *cisco_dtpc_ie,
1336 /* From practical testing, the first data byte of the DTPC element
1337 * seems to contain the requested dBm level, and the CLI on Cisco
1338 * APs clearly state the range is -127 to 127 dBm, which indicates
1339 * a signed byte, although it seemingly never actually goes negative.
1340 * The other byte seems to always be zero.
1342 *pwr_level = (__s8)cisco_dtpc_ie[4];
1345 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1346 struct ieee80211_channel *channel,
1347 struct ieee80211_mgmt *mgmt,
1348 const u8 *country_ie, u8 country_ie_len,
1349 const u8 *pwr_constr_ie,
1350 const u8 *cisco_dtpc_ie)
1352 bool has_80211h_pwr = false, has_cisco_pwr = false;
1353 int chan_pwr = 0, pwr_reduction_80211h = 0;
1354 int pwr_level_cisco, pwr_level_80211h;
1356 __le16 capab = mgmt->u.probe_resp.capab_info;
1359 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1360 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1361 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1362 sdata, channel, country_ie, country_ie_len,
1363 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1365 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1368 if (cisco_dtpc_ie) {
1369 ieee80211_find_cisco_dtpc(
1370 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1371 has_cisco_pwr = true;
1374 if (!has_80211h_pwr && !has_cisco_pwr)
1377 /* If we have both 802.11h and Cisco DTPC, apply both limits
1378 * by picking the smallest of the two power levels advertised.
1380 if (has_80211h_pwr &&
1381 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1383 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1384 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1385 sdata->u.mgd.bssid);
1386 new_ap_level = pwr_level_80211h;
1387 } else { /* has_cisco_pwr is always true here. */
1389 "Limiting TX power to %d dBm as advertised by %pM\n",
1390 pwr_level_cisco, sdata->u.mgd.bssid);
1391 new_ap_level = pwr_level_cisco;
1394 if (sdata->ap_power_level == new_ap_level)
1397 sdata->ap_power_level = new_ap_level;
1398 if (__ieee80211_recalc_txpower(sdata))
1399 return BSS_CHANGED_TXPOWER;
1404 static void ieee80211_enable_ps(struct ieee80211_local *local,
1405 struct ieee80211_sub_if_data *sdata)
1407 struct ieee80211_conf *conf = &local->hw.conf;
1410 * If we are scanning right now then the parameters will
1411 * take effect when scan finishes.
1413 if (local->scanning)
1416 if (conf->dynamic_ps_timeout > 0 &&
1417 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1418 mod_timer(&local->dynamic_ps_timer, jiffies +
1419 msecs_to_jiffies(conf->dynamic_ps_timeout));
1421 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1422 ieee80211_send_nullfunc(local, sdata, true);
1424 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1425 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1428 conf->flags |= IEEE80211_CONF_PS;
1429 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1433 static void ieee80211_change_ps(struct ieee80211_local *local)
1435 struct ieee80211_conf *conf = &local->hw.conf;
1437 if (local->ps_sdata) {
1438 ieee80211_enable_ps(local, local->ps_sdata);
1439 } else if (conf->flags & IEEE80211_CONF_PS) {
1440 conf->flags &= ~IEEE80211_CONF_PS;
1441 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1442 del_timer_sync(&local->dynamic_ps_timer);
1443 cancel_work_sync(&local->dynamic_ps_enable_work);
1447 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1449 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1450 struct sta_info *sta = NULL;
1451 bool authorized = false;
1453 if (!mgd->powersave)
1459 if (!mgd->associated)
1462 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1465 if (!mgd->have_beacon)
1469 sta = sta_info_get(sdata, mgd->bssid);
1471 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1477 /* need to hold RTNL or interface lock */
1478 void ieee80211_recalc_ps(struct ieee80211_local *local)
1480 struct ieee80211_sub_if_data *sdata, *found = NULL;
1484 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1485 local->ps_sdata = NULL;
1489 list_for_each_entry(sdata, &local->interfaces, list) {
1490 if (!ieee80211_sdata_running(sdata))
1492 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1493 /* If an AP vif is found, then disable PS
1494 * by setting the count to zero thereby setting
1500 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1506 if (count == 1 && ieee80211_powersave_allowed(found)) {
1507 u8 dtimper = found->u.mgd.dtim_period;
1510 beaconint_us = ieee80211_tu_to_usec(
1511 found->vif.bss_conf.beacon_int);
1513 timeout = local->dynamic_ps_forced_timeout;
1516 local->hw.conf.dynamic_ps_timeout = timeout;
1518 /* If the TIM IE is invalid, pretend the value is 1 */
1522 local->hw.conf.ps_dtim_period = dtimper;
1523 local->ps_sdata = found;
1525 local->ps_sdata = NULL;
1528 ieee80211_change_ps(local);
1531 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1533 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1535 if (sdata->vif.bss_conf.ps != ps_allowed) {
1536 sdata->vif.bss_conf.ps = ps_allowed;
1537 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1541 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1543 struct ieee80211_local *local =
1544 container_of(work, struct ieee80211_local,
1545 dynamic_ps_disable_work);
1547 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1548 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1549 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1552 ieee80211_wake_queues_by_reason(&local->hw,
1553 IEEE80211_MAX_QUEUE_MAP,
1554 IEEE80211_QUEUE_STOP_REASON_PS,
1558 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1560 struct ieee80211_local *local =
1561 container_of(work, struct ieee80211_local,
1562 dynamic_ps_enable_work);
1563 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1564 struct ieee80211_if_managed *ifmgd;
1565 unsigned long flags;
1568 /* can only happen when PS was just disabled anyway */
1572 ifmgd = &sdata->u.mgd;
1574 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1577 if (local->hw.conf.dynamic_ps_timeout > 0) {
1578 /* don't enter PS if TX frames are pending */
1579 if (drv_tx_frames_pending(local)) {
1580 mod_timer(&local->dynamic_ps_timer, jiffies +
1582 local->hw.conf.dynamic_ps_timeout));
1587 * transmission can be stopped by others which leads to
1588 * dynamic_ps_timer expiry. Postpone the ps timer if it
1589 * is not the actual idle state.
1591 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1592 for (q = 0; q < local->hw.queues; q++) {
1593 if (local->queue_stop_reasons[q]) {
1594 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1596 mod_timer(&local->dynamic_ps_timer, jiffies +
1598 local->hw.conf.dynamic_ps_timeout));
1602 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1605 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1606 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1607 if (drv_tx_frames_pending(local)) {
1608 mod_timer(&local->dynamic_ps_timer, jiffies +
1610 local->hw.conf.dynamic_ps_timeout));
1612 ieee80211_send_nullfunc(local, sdata, true);
1613 /* Flush to get the tx status of nullfunc frame */
1614 ieee80211_flush_queues(local, sdata, false);
1618 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1619 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1620 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1621 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1622 local->hw.conf.flags |= IEEE80211_CONF_PS;
1623 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1627 void ieee80211_dynamic_ps_timer(unsigned long data)
1629 struct ieee80211_local *local = (void *) data;
1631 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1634 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1636 struct delayed_work *delayed_work =
1637 container_of(work, struct delayed_work, work);
1638 struct ieee80211_sub_if_data *sdata =
1639 container_of(delayed_work, struct ieee80211_sub_if_data,
1640 dfs_cac_timer_work);
1641 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1643 mutex_lock(&sdata->local->mtx);
1644 if (sdata->wdev.cac_started) {
1645 ieee80211_vif_release_channel(sdata);
1646 cfg80211_cac_event(sdata->dev, &chandef,
1647 NL80211_RADAR_CAC_FINISHED,
1650 mutex_unlock(&sdata->local->mtx);
1654 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1656 struct ieee80211_local *local = sdata->local;
1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1661 if (local->hw.queues < IEEE80211_NUM_ACS)
1664 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1665 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1667 unsigned long now = jiffies;
1669 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1670 tx_tspec->admitted_time &&
1671 time_after(now, tx_tspec->time_slice_start + HZ)) {
1672 tx_tspec->consumed_tx_time = 0;
1673 tx_tspec->time_slice_start = now;
1675 if (tx_tspec->downgraded)
1677 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1680 switch (tx_tspec->action) {
1681 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1682 /* take the original parameters */
1683 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1685 "failed to set TX queue parameters for queue %d\n",
1687 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1688 tx_tspec->downgraded = false;
1691 case TX_TSPEC_ACTION_DOWNGRADE:
1692 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1693 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1697 /* downgrade next lower non-ACM AC */
1698 for (non_acm_ac = ac + 1;
1699 non_acm_ac < IEEE80211_NUM_ACS;
1701 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1703 /* The loop will result in using BK even if it requires
1704 * admission control, such configuration makes no sense
1705 * and we have to transmit somehow - the AC selection
1706 * does the same thing.
1708 if (drv_conf_tx(local, sdata, ac,
1709 &sdata->tx_conf[non_acm_ac]))
1711 "failed to set TX queue parameters for queue %d\n",
1713 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1715 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1716 tx_tspec->time_slice_start + HZ - now + 1);
1718 case TX_TSPEC_ACTION_NONE:
1727 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1729 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1730 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1733 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1735 struct ieee80211_sub_if_data *sdata;
1737 sdata = container_of(work, struct ieee80211_sub_if_data,
1738 u.mgd.tx_tspec_wk.work);
1739 ieee80211_sta_handle_tspec_ac_params(sdata);
1743 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1744 struct ieee80211_sub_if_data *sdata,
1745 const u8 *wmm_param, size_t wmm_param_len)
1747 struct ieee80211_tx_queue_params params;
1748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1752 u8 uapsd_queues = 0;
1754 if (!local->ops->conf_tx)
1757 if (local->hw.queues < IEEE80211_NUM_ACS)
1763 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1766 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1767 uapsd_queues = ifmgd->uapsd_queues;
1769 count = wmm_param[6] & 0x0f;
1770 if (count == ifmgd->wmm_last_param_set)
1772 ifmgd->wmm_last_param_set = count;
1774 pos = wmm_param + 8;
1775 left = wmm_param_len - 8;
1777 memset(¶ms, 0, sizeof(params));
1780 for (; left >= 4; left -= 4, pos += 4) {
1781 int aci = (pos[0] >> 5) & 0x03;
1782 int acm = (pos[0] >> 4) & 0x01;
1790 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1791 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1797 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1798 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1804 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1805 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1812 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1813 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1818 params.aifs = pos[0] & 0x0f;
1820 if (params.aifs < 2) {
1822 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1826 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1827 params.cw_min = ecw2cw(pos[1] & 0x0f);
1828 params.txop = get_unaligned_le16(pos + 2);
1830 params.uapsd = uapsd;
1833 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1835 params.aifs, params.cw_min, params.cw_max,
1836 params.txop, params.uapsd,
1837 ifmgd->tx_tspec[queue].downgraded);
1838 sdata->tx_conf[queue] = params;
1839 if (!ifmgd->tx_tspec[queue].downgraded &&
1840 drv_conf_tx(local, sdata, queue, ¶ms))
1842 "failed to set TX queue parameters for queue %d\n",
1846 /* enable WMM or activate new settings */
1847 sdata->vif.bss_conf.qos = true;
1851 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1853 lockdep_assert_held(&sdata->local->mtx);
1855 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1856 ieee80211_run_deferred_scan(sdata->local);
1859 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1861 mutex_lock(&sdata->local->mtx);
1862 __ieee80211_stop_poll(sdata);
1863 mutex_unlock(&sdata->local->mtx);
1866 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1867 u16 capab, bool erp_valid, u8 erp)
1869 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1871 bool use_protection;
1872 bool use_short_preamble;
1873 bool use_short_slot;
1876 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1877 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1879 use_protection = false;
1880 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1883 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1884 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1885 use_short_slot = true;
1887 if (use_protection != bss_conf->use_cts_prot) {
1888 bss_conf->use_cts_prot = use_protection;
1889 changed |= BSS_CHANGED_ERP_CTS_PROT;
1892 if (use_short_preamble != bss_conf->use_short_preamble) {
1893 bss_conf->use_short_preamble = use_short_preamble;
1894 changed |= BSS_CHANGED_ERP_PREAMBLE;
1897 if (use_short_slot != bss_conf->use_short_slot) {
1898 bss_conf->use_short_slot = use_short_slot;
1899 changed |= BSS_CHANGED_ERP_SLOT;
1905 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1906 struct cfg80211_bss *cbss,
1907 u32 bss_info_changed)
1909 struct ieee80211_bss *bss = (void *)cbss->priv;
1910 struct ieee80211_local *local = sdata->local;
1911 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1913 bss_info_changed |= BSS_CHANGED_ASSOC;
1914 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1915 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1917 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1918 beacon_loss_count * bss_conf->beacon_int));
1920 sdata->u.mgd.associated = cbss;
1921 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1923 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1925 if (sdata->vif.p2p) {
1926 const struct cfg80211_bss_ies *ies;
1929 ies = rcu_dereference(cbss->ies);
1933 ret = cfg80211_get_p2p_attr(
1934 ies->data, ies->len,
1935 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1936 (u8 *) &bss_conf->p2p_noa_attr,
1937 sizeof(bss_conf->p2p_noa_attr));
1939 sdata->u.mgd.p2p_noa_index =
1940 bss_conf->p2p_noa_attr.index;
1941 bss_info_changed |= BSS_CHANGED_P2P_PS;
1947 /* just to be sure */
1948 ieee80211_stop_poll(sdata);
1950 ieee80211_led_assoc(local, 1);
1952 if (sdata->u.mgd.have_beacon) {
1954 * If the AP is buggy we may get here with no DTIM period
1955 * known, so assume it's 1 which is the only safe assumption
1956 * in that case, although if the TIM IE is broken powersave
1957 * probably just won't work at all.
1959 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1960 bss_conf->beacon_rate = bss->beacon_rate;
1961 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1963 bss_conf->beacon_rate = NULL;
1964 bss_conf->dtim_period = 0;
1967 bss_conf->assoc = 1;
1969 /* Tell the driver to monitor connection quality (if supported) */
1970 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1971 bss_conf->cqm_rssi_thold)
1972 bss_info_changed |= BSS_CHANGED_CQM;
1974 /* Enable ARP filtering */
1975 if (bss_conf->arp_addr_cnt)
1976 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1978 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1980 mutex_lock(&local->iflist_mtx);
1981 ieee80211_recalc_ps(local);
1982 mutex_unlock(&local->iflist_mtx);
1984 ieee80211_recalc_smps(sdata);
1985 ieee80211_recalc_ps_vif(sdata);
1987 netif_carrier_on(sdata->dev);
1990 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1991 u16 stype, u16 reason, bool tx,
1994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1995 struct ieee80211_local *local = sdata->local;
1998 sdata_assert_lock(sdata);
2000 if (WARN_ON_ONCE(tx && !frame_buf))
2003 if (WARN_ON(!ifmgd->associated))
2006 ieee80211_stop_poll(sdata);
2008 ifmgd->associated = NULL;
2009 netif_carrier_off(sdata->dev);
2012 * if we want to get out of ps before disassoc (why?) we have
2013 * to do it before sending disassoc, as otherwise the null-packet
2016 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2017 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2018 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2020 local->ps_sdata = NULL;
2022 /* disable per-vif ps */
2023 ieee80211_recalc_ps_vif(sdata);
2025 /* make sure ongoing transmission finishes */
2029 * drop any frame before deauth/disassoc, this can be data or
2030 * management frame. Since we are disconnecting, we should not
2031 * insist sending these frames which can take time and delay
2032 * the disconnection and possible the roaming.
2035 ieee80211_flush_queues(local, sdata, true);
2037 /* deauthenticate/disassociate now */
2038 if (tx || frame_buf)
2039 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2040 reason, tx, frame_buf);
2042 /* flush out frame - make sure the deauth was actually sent */
2044 ieee80211_flush_queues(local, sdata, false);
2046 /* clear bssid only after building the needed mgmt frames */
2047 eth_zero_addr(ifmgd->bssid);
2049 /* remove AP and TDLS peers */
2050 sta_info_flush(sdata);
2052 /* finally reset all BSS / config parameters */
2053 changed |= ieee80211_reset_erp_info(sdata);
2055 ieee80211_led_assoc(local, 0);
2056 changed |= BSS_CHANGED_ASSOC;
2057 sdata->vif.bss_conf.assoc = false;
2059 ifmgd->p2p_noa_index = -1;
2060 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2061 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2063 /* on the next assoc, re-program HT/VHT parameters */
2064 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2065 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2066 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2067 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2068 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2070 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2072 del_timer_sync(&local->dynamic_ps_timer);
2073 cancel_work_sync(&local->dynamic_ps_enable_work);
2075 /* Disable ARP filtering */
2076 if (sdata->vif.bss_conf.arp_addr_cnt)
2077 changed |= BSS_CHANGED_ARP_FILTER;
2079 sdata->vif.bss_conf.qos = false;
2080 changed |= BSS_CHANGED_QOS;
2082 /* The BSSID (not really interesting) and HT changed */
2083 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2084 ieee80211_bss_info_change_notify(sdata, changed);
2086 /* disassociated - set to defaults now */
2087 ieee80211_set_wmm_default(sdata, false, false);
2089 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2090 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2091 del_timer_sync(&sdata->u.mgd.timer);
2092 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2094 sdata->vif.bss_conf.dtim_period = 0;
2095 sdata->vif.bss_conf.beacon_rate = NULL;
2097 ifmgd->have_beacon = false;
2100 mutex_lock(&local->mtx);
2101 ieee80211_vif_release_channel(sdata);
2103 sdata->vif.csa_active = false;
2104 ifmgd->csa_waiting_bcn = false;
2105 ifmgd->csa_ignored_same_chan = false;
2106 if (sdata->csa_block_tx) {
2107 ieee80211_wake_vif_queues(local, sdata,
2108 IEEE80211_QUEUE_STOP_REASON_CSA);
2109 sdata->csa_block_tx = false;
2111 mutex_unlock(&local->mtx);
2113 /* existing TX TSPEC sessions no longer exist */
2114 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2115 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2117 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2120 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2121 struct ieee80211_hdr *hdr)
2124 * We can postpone the mgd.timer whenever receiving unicast frames
2125 * from AP because we know that the connection is working both ways
2126 * at that time. But multicast frames (and hence also beacons) must
2127 * be ignored here, because we need to trigger the timer during
2128 * data idle periods for sending the periodic probe request to the
2129 * AP we're connected to.
2131 if (is_multicast_ether_addr(hdr->addr1))
2134 ieee80211_sta_reset_conn_monitor(sdata);
2137 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2140 struct ieee80211_local *local = sdata->local;
2142 mutex_lock(&local->mtx);
2143 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2146 __ieee80211_stop_poll(sdata);
2148 mutex_lock(&local->iflist_mtx);
2149 ieee80211_recalc_ps(local);
2150 mutex_unlock(&local->iflist_mtx);
2152 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2156 * We've received a probe response, but are not sure whether
2157 * we have or will be receiving any beacons or data, so let's
2158 * schedule the timers again, just in case.
2160 ieee80211_sta_reset_beacon_monitor(sdata);
2162 mod_timer(&ifmgd->conn_mon_timer,
2163 round_jiffies_up(jiffies +
2164 IEEE80211_CONNECTION_IDLE_TIME));
2166 mutex_unlock(&local->mtx);
2169 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2170 struct ieee80211_hdr *hdr,
2173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2174 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2175 int ac = ieee80211_ac_from_tid(tid);
2176 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2177 unsigned long now = jiffies;
2179 if (likely(!tx_tspec->admitted_time))
2182 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2183 tx_tspec->consumed_tx_time = 0;
2184 tx_tspec->time_slice_start = now;
2186 if (tx_tspec->downgraded) {
2187 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2188 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2192 if (tx_tspec->downgraded)
2195 tx_tspec->consumed_tx_time += tx_time;
2197 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2198 tx_tspec->downgraded = true;
2199 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2200 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2204 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2205 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2207 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2209 if (!ieee80211_is_data(hdr->frame_control))
2212 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2213 sdata->u.mgd.probe_send_count > 0) {
2215 ieee80211_sta_reset_conn_monitor(sdata);
2217 sdata->u.mgd.nullfunc_failed = true;
2218 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2223 ieee80211_sta_reset_conn_monitor(sdata);
2226 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2230 u8 *dst = ifmgd->associated->bssid;
2231 u8 unicast_limit = max(1, max_probe_tries - 3);
2234 * Try sending broadcast probe requests for the last three
2235 * probe requests after the first ones failed since some
2236 * buggy APs only support broadcast probe requests.
2238 if (ifmgd->probe_send_count >= unicast_limit)
2242 * When the hardware reports an accurate Tx ACK status, it's
2243 * better to send a nullfunc frame instead of a probe request,
2244 * as it will kick us off the AP quickly if we aren't associated
2245 * anymore. The timeout will be reset if the frame is ACKed by
2248 ifmgd->probe_send_count++;
2250 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2251 ifmgd->nullfunc_failed = false;
2252 ieee80211_send_nullfunc(sdata->local, sdata, false);
2257 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2258 if (WARN_ON_ONCE(ssid == NULL))
2263 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2264 ssid + 2, ssid_len, NULL,
2265 0, (u32) -1, true, 0,
2266 ifmgd->associated->channel, false);
2270 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2271 run_again(sdata, ifmgd->probe_timeout);
2274 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2277 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2278 bool already = false;
2280 if (!ieee80211_sdata_running(sdata))
2285 if (!ifmgd->associated)
2288 mutex_lock(&sdata->local->mtx);
2290 if (sdata->local->tmp_channel || sdata->local->scanning) {
2291 mutex_unlock(&sdata->local->mtx);
2296 mlme_dbg_ratelimited(sdata,
2297 "detected beacon loss from AP (missed %d beacons) - probing\n",
2300 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2304 * The driver/our work has already reported this event or the
2305 * connection monitoring has kicked in and we have already sent
2306 * a probe request. Or maybe the AP died and the driver keeps
2307 * reporting until we disassociate...
2309 * In either case we have to ignore the current call to this
2310 * function (except for setting the correct probe reason bit)
2311 * because otherwise we would reset the timer every time and
2312 * never check whether we received a probe response!
2314 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2317 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2319 mutex_unlock(&sdata->local->mtx);
2324 mutex_lock(&sdata->local->iflist_mtx);
2325 ieee80211_recalc_ps(sdata->local);
2326 mutex_unlock(&sdata->local->iflist_mtx);
2328 ifmgd->probe_send_count = 0;
2329 ieee80211_mgd_probe_ap_send(sdata);
2331 sdata_unlock(sdata);
2334 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2335 struct ieee80211_vif *vif)
2337 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2338 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2339 struct cfg80211_bss *cbss;
2340 struct sk_buff *skb;
2344 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2347 sdata_assert_lock(sdata);
2349 if (ifmgd->associated)
2350 cbss = ifmgd->associated;
2351 else if (ifmgd->auth_data)
2352 cbss = ifmgd->auth_data->bss;
2353 else if (ifmgd->assoc_data)
2354 cbss = ifmgd->assoc_data->bss;
2359 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2360 if (WARN_ON_ONCE(ssid == NULL))
2365 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2366 (u32) -1, cbss->channel,
2373 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2375 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2376 const u8 *buf, size_t len, bool tx,
2379 struct ieee80211_event event = {
2381 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2382 .u.mlme.reason = reason,
2386 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2388 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2390 drv_event_callback(sdata->local, sdata, &event);
2393 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2395 struct ieee80211_local *local = sdata->local;
2396 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2397 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2400 if (!ifmgd->associated) {
2401 sdata_unlock(sdata);
2405 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2406 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2408 mutex_lock(&local->mtx);
2409 sdata->vif.csa_active = false;
2410 ifmgd->csa_waiting_bcn = false;
2411 if (sdata->csa_block_tx) {
2412 ieee80211_wake_vif_queues(local, sdata,
2413 IEEE80211_QUEUE_STOP_REASON_CSA);
2414 sdata->csa_block_tx = false;
2416 mutex_unlock(&local->mtx);
2418 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2419 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2421 sdata_unlock(sdata);
2424 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2426 struct ieee80211_sub_if_data *sdata =
2427 container_of(work, struct ieee80211_sub_if_data,
2428 u.mgd.beacon_connection_loss_work);
2429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2431 if (ifmgd->associated)
2432 ifmgd->beacon_loss_count++;
2434 if (ifmgd->connection_loss) {
2435 sdata_info(sdata, "Connection to AP %pM lost\n",
2437 __ieee80211_disconnect(sdata);
2439 ieee80211_mgd_probe_ap(sdata, true);
2443 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2445 struct ieee80211_sub_if_data *sdata =
2446 container_of(work, struct ieee80211_sub_if_data,
2447 u.mgd.csa_connection_drop_work);
2449 __ieee80211_disconnect(sdata);
2452 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2454 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2455 struct ieee80211_hw *hw = &sdata->local->hw;
2457 trace_api_beacon_loss(sdata);
2459 sdata->u.mgd.connection_loss = false;
2460 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2462 EXPORT_SYMBOL(ieee80211_beacon_loss);
2464 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2466 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2467 struct ieee80211_hw *hw = &sdata->local->hw;
2469 trace_api_connection_loss(sdata);
2471 sdata->u.mgd.connection_loss = true;
2472 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2474 EXPORT_SYMBOL(ieee80211_connection_loss);
2477 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2480 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2482 sdata_assert_lock(sdata);
2486 * we are not authenticated yet, the only timer that could be
2487 * running is the timeout for the authentication response which
2488 * which is not relevant anymore.
2490 del_timer_sync(&sdata->u.mgd.timer);
2491 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2493 eth_zero_addr(sdata->u.mgd.bssid);
2494 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2495 sdata->u.mgd.flags = 0;
2496 mutex_lock(&sdata->local->mtx);
2497 ieee80211_vif_release_channel(sdata);
2498 mutex_unlock(&sdata->local->mtx);
2501 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2503 sdata->u.mgd.auth_data = NULL;
2506 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2509 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2511 sdata_assert_lock(sdata);
2515 * we are not associated yet, the only timer that could be
2516 * running is the timeout for the association response which
2517 * which is not relevant anymore.
2519 del_timer_sync(&sdata->u.mgd.timer);
2520 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2522 eth_zero_addr(sdata->u.mgd.bssid);
2523 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2524 sdata->u.mgd.flags = 0;
2525 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2526 mutex_lock(&sdata->local->mtx);
2527 ieee80211_vif_release_channel(sdata);
2528 mutex_unlock(&sdata->local->mtx);
2532 sdata->u.mgd.assoc_data = NULL;
2535 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2536 struct ieee80211_mgmt *mgmt, size_t len)
2538 struct ieee80211_local *local = sdata->local;
2539 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2541 struct ieee802_11_elems elems;
2544 pos = mgmt->u.auth.variable;
2545 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2546 if (!elems.challenge)
2548 auth_data->expected_transaction = 4;
2549 drv_mgd_prepare_tx(sdata->local, sdata);
2550 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2551 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2552 IEEE80211_TX_INTFL_MLME_CONN_TX;
2553 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2554 elems.challenge - 2, elems.challenge_len + 2,
2555 auth_data->bss->bssid, auth_data->bss->bssid,
2556 auth_data->key, auth_data->key_len,
2557 auth_data->key_idx, tx_flags);
2560 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2561 struct ieee80211_mgmt *mgmt, size_t len)
2563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2565 u16 auth_alg, auth_transaction, status_code;
2566 struct sta_info *sta;
2567 struct ieee80211_event event = {
2569 .u.mlme.data = AUTH_EVENT,
2572 sdata_assert_lock(sdata);
2577 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2580 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2582 if (!ether_addr_equal(bssid, mgmt->bssid))
2585 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2586 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2587 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2589 if (auth_alg != ifmgd->auth_data->algorithm ||
2590 auth_transaction != ifmgd->auth_data->expected_transaction) {
2591 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2592 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2594 ifmgd->auth_data->expected_transaction);
2598 if (status_code != WLAN_STATUS_SUCCESS) {
2599 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2600 mgmt->sa, status_code);
2601 ieee80211_destroy_auth_data(sdata, false);
2602 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2603 event.u.mlme.status = MLME_DENIED;
2604 event.u.mlme.reason = status_code;
2605 drv_event_callback(sdata->local, sdata, &event);
2609 switch (ifmgd->auth_data->algorithm) {
2610 case WLAN_AUTH_OPEN:
2611 case WLAN_AUTH_LEAP:
2615 case WLAN_AUTH_SHARED_KEY:
2616 if (ifmgd->auth_data->expected_transaction != 4) {
2617 ieee80211_auth_challenge(sdata, mgmt, len);
2618 /* need another frame */
2623 WARN_ONCE(1, "invalid auth alg %d",
2624 ifmgd->auth_data->algorithm);
2628 event.u.mlme.status = MLME_SUCCESS;
2629 drv_event_callback(sdata->local, sdata, &event);
2630 sdata_info(sdata, "authenticated\n");
2631 ifmgd->auth_data->done = true;
2632 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2633 ifmgd->auth_data->timeout_started = true;
2634 run_again(sdata, ifmgd->auth_data->timeout);
2636 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2637 ifmgd->auth_data->expected_transaction != 2) {
2639 * Report auth frame to user space for processing since another
2640 * round of Authentication frames is still needed.
2642 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2646 /* move station state to auth */
2647 mutex_lock(&sdata->local->sta_mtx);
2648 sta = sta_info_get(sdata, bssid);
2650 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2653 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2654 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2657 mutex_unlock(&sdata->local->sta_mtx);
2659 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2662 mutex_unlock(&sdata->local->sta_mtx);
2663 /* ignore frame -- wait for timeout */
2666 #define case_WLAN(type) \
2667 case WLAN_REASON_##type: return #type
2669 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2671 switch (reason_code) {
2672 case_WLAN(UNSPECIFIED);
2673 case_WLAN(PREV_AUTH_NOT_VALID);
2674 case_WLAN(DEAUTH_LEAVING);
2675 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2676 case_WLAN(DISASSOC_AP_BUSY);
2677 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2678 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2679 case_WLAN(DISASSOC_STA_HAS_LEFT);
2680 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2681 case_WLAN(DISASSOC_BAD_POWER);
2682 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2683 case_WLAN(INVALID_IE);
2684 case_WLAN(MIC_FAILURE);
2685 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2686 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2687 case_WLAN(IE_DIFFERENT);
2688 case_WLAN(INVALID_GROUP_CIPHER);
2689 case_WLAN(INVALID_PAIRWISE_CIPHER);
2690 case_WLAN(INVALID_AKMP);
2691 case_WLAN(UNSUPP_RSN_VERSION);
2692 case_WLAN(INVALID_RSN_IE_CAP);
2693 case_WLAN(IEEE8021X_FAILED);
2694 case_WLAN(CIPHER_SUITE_REJECTED);
2695 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2696 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2697 case_WLAN(DISASSOC_LOW_ACK);
2698 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2699 case_WLAN(QSTA_LEAVE_QBSS);
2700 case_WLAN(QSTA_NOT_USE);
2701 case_WLAN(QSTA_REQUIRE_SETUP);
2702 case_WLAN(QSTA_TIMEOUT);
2703 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2704 case_WLAN(MESH_PEER_CANCELED);
2705 case_WLAN(MESH_MAX_PEERS);
2706 case_WLAN(MESH_CONFIG);
2707 case_WLAN(MESH_CLOSE);
2708 case_WLAN(MESH_MAX_RETRIES);
2709 case_WLAN(MESH_CONFIRM_TIMEOUT);
2710 case_WLAN(MESH_INVALID_GTK);
2711 case_WLAN(MESH_INCONSISTENT_PARAM);
2712 case_WLAN(MESH_INVALID_SECURITY);
2713 case_WLAN(MESH_PATH_ERROR);
2714 case_WLAN(MESH_PATH_NOFORWARD);
2715 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2716 case_WLAN(MAC_EXISTS_IN_MBSS);
2717 case_WLAN(MESH_CHAN_REGULATORY);
2718 case_WLAN(MESH_CHAN);
2719 default: return "<unknown>";
2723 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2724 struct ieee80211_mgmt *mgmt, size_t len)
2726 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2727 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2729 sdata_assert_lock(sdata);
2734 if (ifmgd->associated &&
2735 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2736 const u8 *bssid = ifmgd->associated->bssid;
2738 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2740 ieee80211_get_reason_code_string(reason_code));
2742 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2744 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2749 if (ifmgd->assoc_data &&
2750 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2751 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2754 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2756 ieee80211_get_reason_code_string(reason_code));
2758 ieee80211_destroy_assoc_data(sdata, false);
2760 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2766 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2767 struct ieee80211_mgmt *mgmt, size_t len)
2769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2772 sdata_assert_lock(sdata);
2777 if (!ifmgd->associated ||
2778 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2781 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2783 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2784 mgmt->sa, reason_code);
2786 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2788 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2791 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2792 u8 *supp_rates, unsigned int supp_rates_len,
2793 u32 *rates, u32 *basic_rates,
2794 bool *have_higher_than_11mbit,
2795 int *min_rate, int *min_rate_index,
2796 int shift, u32 rate_flags)
2800 for (i = 0; i < supp_rates_len; i++) {
2801 int rate = supp_rates[i] & 0x7f;
2802 bool is_basic = !!(supp_rates[i] & 0x80);
2804 if ((rate * 5 * (1 << shift)) > 110)
2805 *have_higher_than_11mbit = true;
2808 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2809 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2811 * Note: Even through the membership selector and the basic
2812 * rate flag share the same bit, they are not exactly
2815 if (!!(supp_rates[i] & 0x80) &&
2816 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2819 for (j = 0; j < sband->n_bitrates; j++) {
2820 struct ieee80211_rate *br;
2823 br = &sband->bitrates[j];
2824 if ((rate_flags & br->flags) != rate_flags)
2827 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2828 if (brate == rate) {
2831 *basic_rates |= BIT(j);
2832 if ((rate * 5) < *min_rate) {
2833 *min_rate = rate * 5;
2834 *min_rate_index = j;
2842 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2843 struct cfg80211_bss *cbss,
2844 struct ieee80211_mgmt *mgmt, size_t len)
2846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2847 struct ieee80211_local *local = sdata->local;
2848 struct ieee80211_supported_band *sband;
2849 struct sta_info *sta;
2851 u16 capab_info, aid;
2852 struct ieee802_11_elems elems;
2853 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2854 const struct cfg80211_bss_ies *bss_ies = NULL;
2855 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2860 /* AssocResp and ReassocResp have identical structure */
2862 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2863 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2865 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2866 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2868 aid &= ~(BIT(15) | BIT(14));
2870 ifmgd->broken_ap = false;
2872 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2873 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2876 ifmgd->broken_ap = true;
2879 pos = mgmt->u.assoc_resp.variable;
2880 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2882 if (!elems.supp_rates) {
2883 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2888 ifmgd->tdls_chan_switch_prohibited =
2889 elems.ext_capab && elems.ext_capab_len >= 5 &&
2890 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2893 * Some APs are erroneously not including some information in their
2894 * (re)association response frames. Try to recover by using the data
2895 * from the beacon or probe response. This seems to afflict mobile
2896 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2897 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2899 if ((assoc_data->wmm && !elems.wmm_param) ||
2900 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2901 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2902 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2903 (!elems.vht_cap_elem || !elems.vht_operation))) {
2904 const struct cfg80211_bss_ies *ies;
2905 struct ieee802_11_elems bss_elems;
2908 ies = rcu_dereference(cbss->ies);
2910 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2916 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2918 if (assoc_data->wmm &&
2919 !elems.wmm_param && bss_elems.wmm_param) {
2920 elems.wmm_param = bss_elems.wmm_param;
2922 "AP bug: WMM param missing from AssocResp\n");
2926 * Also check if we requested HT/VHT, otherwise the AP doesn't
2927 * have to include the IEs in the (re)association response.
2929 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2930 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2931 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2933 "AP bug: HT capability missing from AssocResp\n");
2935 if (!elems.ht_operation && bss_elems.ht_operation &&
2936 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2937 elems.ht_operation = bss_elems.ht_operation;
2939 "AP bug: HT operation missing from AssocResp\n");
2941 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2942 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2943 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2945 "AP bug: VHT capa missing from AssocResp\n");
2947 if (!elems.vht_operation && bss_elems.vht_operation &&
2948 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2949 elems.vht_operation = bss_elems.vht_operation;
2951 "AP bug: VHT operation missing from AssocResp\n");
2956 * We previously checked these in the beacon/probe response, so
2957 * they should be present here. This is just a safety net.
2959 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2960 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2962 "HT AP is missing WMM params or HT capability/operation\n");
2967 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2968 (!elems.vht_cap_elem || !elems.vht_operation)) {
2970 "VHT AP is missing VHT capability/operation\n");
2975 mutex_lock(&sdata->local->sta_mtx);
2977 * station info was already allocated and inserted before
2978 * the association and should be available to us
2980 sta = sta_info_get(sdata, cbss->bssid);
2981 if (WARN_ON(!sta)) {
2982 mutex_unlock(&sdata->local->sta_mtx);
2987 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2989 /* Set up internal HT/VHT capabilities */
2990 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2991 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2992 elems.ht_cap_elem, sta);
2994 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2995 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2996 elems.vht_cap_elem, sta);
2999 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3000 * in their association response, so ignore that data for our own
3001 * configuration. If it changed since the last beacon, we'll get the
3002 * next beacon and update then.
3006 * If an operating mode notification IE is present, override the
3007 * NSS calculation (that would be done in rate_control_rate_init())
3008 * and use the # of streams from that element.
3010 if (elems.opmode_notif &&
3011 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3014 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3015 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3017 sta->sta.rx_nss = nss;
3020 rate_control_rate_init(sta);
3022 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3023 set_sta_flag(sta, WLAN_STA_MFP);
3024 sta->sta.mfp = true;
3026 sta->sta.mfp = false;
3029 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3031 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3032 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3033 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3036 "failed to move station %pM to desired state\n",
3038 WARN_ON(__sta_info_destroy(sta));
3039 mutex_unlock(&sdata->local->sta_mtx);
3044 mutex_unlock(&sdata->local->sta_mtx);
3047 * Always handle WMM once after association regardless
3048 * of the first value the AP uses. Setting -1 here has
3049 * that effect because the AP values is an unsigned
3052 ifmgd->wmm_last_param_set = -1;
3054 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
3055 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3056 elems.wmm_param_len);
3058 ieee80211_set_wmm_default(sdata, false, false);
3059 changed |= BSS_CHANGED_QOS;
3061 /* set AID and assoc capability,
3062 * ieee80211_set_associated() will tell the driver */
3063 bss_conf->aid = aid;
3064 bss_conf->assoc_capability = capab_info;
3065 ieee80211_set_associated(sdata, cbss, changed);
3068 * If we're using 4-addr mode, let the AP know that we're
3069 * doing so, so that it can create the STA VLAN on its side
3071 if (ifmgd->use_4addr)
3072 ieee80211_send_4addr_nullfunc(local, sdata);
3075 * Start timer to probe the connection to the AP now.
3076 * Also start the timer that will detect beacon loss.
3078 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3079 ieee80211_sta_reset_beacon_monitor(sdata);
3087 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3088 struct ieee80211_mgmt *mgmt,
3091 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3092 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3093 u16 capab_info, status_code, aid;
3094 struct ieee802_11_elems elems;
3095 int ac, uapsd_queues = -1;
3098 struct cfg80211_bss *bss;
3099 struct ieee80211_event event = {
3101 .u.mlme.data = ASSOC_EVENT,
3104 sdata_assert_lock(sdata);
3108 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3112 * AssocResp and ReassocResp have identical structure, so process both
3113 * of them in this function.
3119 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3120 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3121 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3122 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3125 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3126 reassoc ? "Rea" : "A", mgmt->sa,
3127 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3129 pos = mgmt->u.assoc_resp.variable;
3130 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3132 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3133 elems.timeout_int &&
3134 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3136 tu = le32_to_cpu(elems.timeout_int->value);
3137 ms = tu * 1024 / 1000;
3139 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3141 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3142 assoc_data->timeout_started = true;
3143 if (ms > IEEE80211_ASSOC_TIMEOUT)
3144 run_again(sdata, assoc_data->timeout);
3148 bss = assoc_data->bss;
3150 if (status_code != WLAN_STATUS_SUCCESS) {
3151 sdata_info(sdata, "%pM denied association (code=%d)\n",
3152 mgmt->sa, status_code);
3153 ieee80211_destroy_assoc_data(sdata, false);
3154 event.u.mlme.status = MLME_DENIED;
3155 event.u.mlme.reason = status_code;
3156 drv_event_callback(sdata->local, sdata, &event);
3158 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3159 /* oops -- internal error -- send timeout for now */
3160 ieee80211_destroy_assoc_data(sdata, false);
3161 cfg80211_assoc_timeout(sdata->dev, bss);
3164 event.u.mlme.status = MLME_SUCCESS;
3165 drv_event_callback(sdata->local, sdata, &event);
3166 sdata_info(sdata, "associated\n");
3169 * destroy assoc_data afterwards, as otherwise an idle
3170 * recalc after assoc_data is NULL but before associated
3171 * is set can cause the interface to go idle
3173 ieee80211_destroy_assoc_data(sdata, true);
3175 /* get uapsd queues configuration */
3177 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3178 if (sdata->tx_conf[ac].uapsd)
3179 uapsd_queues |= BIT(ac);
3182 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3185 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3186 struct ieee80211_mgmt *mgmt, size_t len,
3187 struct ieee80211_rx_status *rx_status,
3188 struct ieee802_11_elems *elems)
3190 struct ieee80211_local *local = sdata->local;
3191 struct ieee80211_bss *bss;
3192 struct ieee80211_channel *channel;
3194 sdata_assert_lock(sdata);
3196 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3200 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3203 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3204 ieee80211_rx_bss_put(local, bss);
3209 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3210 struct sk_buff *skb)
3212 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3213 struct ieee80211_if_managed *ifmgd;
3214 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3215 size_t baselen, len = skb->len;
3216 struct ieee802_11_elems elems;
3218 ifmgd = &sdata->u.mgd;
3220 sdata_assert_lock(sdata);
3222 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3223 return; /* ignore ProbeResp to foreign address */
3225 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3229 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3232 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3234 if (ifmgd->associated &&
3235 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3236 ieee80211_reset_ap_probe(sdata);
3240 * This is the canonical list of information elements we care about,
3241 * the filter code also gives us all changes to the Microsoft OUI
3242 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3243 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3244 * changes to requested client power.
3246 * We implement beacon filtering in software since that means we can
3247 * avoid processing the frame here and in cfg80211, and userspace
3248 * will not be able to tell whether the hardware supports it or not.
3250 * XXX: This list needs to be dynamic -- userspace needs to be able to
3251 * add items it requires. It also needs to be able to tell us to
3252 * look out for other vendor IEs.
3254 static const u64 care_about_ies =
3255 (1ULL << WLAN_EID_COUNTRY) |
3256 (1ULL << WLAN_EID_ERP_INFO) |
3257 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3258 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3259 (1ULL << WLAN_EID_HT_CAPABILITY) |
3260 (1ULL << WLAN_EID_HT_OPERATION) |
3261 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3263 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3264 struct ieee80211_mgmt *mgmt, size_t len,
3265 struct ieee80211_rx_status *rx_status)
3267 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3268 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3270 struct ieee802_11_elems elems;
3271 struct ieee80211_local *local = sdata->local;
3272 struct ieee80211_chanctx_conf *chanctx_conf;
3273 struct ieee80211_channel *chan;
3274 struct sta_info *sta;
3280 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3282 sdata_assert_lock(sdata);
3284 /* Process beacon from the current BSS */
3285 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3290 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3291 if (!chanctx_conf) {
3296 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3300 chan = chanctx_conf->def.chan;
3303 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3304 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3305 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3306 len - baselen, false, &elems);
3308 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3309 if (elems.tim && !elems.parse_error) {
3310 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3311 ifmgd->dtim_period = tim_ie->dtim_period;
3313 ifmgd->have_beacon = true;
3314 ifmgd->assoc_data->need_beacon = false;
3315 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3316 sdata->vif.bss_conf.sync_tsf =
3317 le64_to_cpu(mgmt->u.beacon.timestamp);
3318 sdata->vif.bss_conf.sync_device_ts =
3319 rx_status->device_timestamp;
3321 sdata->vif.bss_conf.sync_dtim_count =
3322 elems.tim->dtim_count;
3324 sdata->vif.bss_conf.sync_dtim_count = 0;
3326 /* continue assoc process */
3327 ifmgd->assoc_data->timeout = jiffies;
3328 ifmgd->assoc_data->timeout_started = true;
3329 run_again(sdata, ifmgd->assoc_data->timeout);
3333 if (!ifmgd->associated ||
3334 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3336 bssid = ifmgd->associated->bssid;
3338 /* Track average RSSI from the Beacon frames of the current AP */
3339 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3340 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3341 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3342 ifmgd->last_cqm_event_signal = 0;
3343 ifmgd->count_beacon_signal = 1;
3344 ifmgd->last_ave_beacon_signal = 0;
3346 ifmgd->count_beacon_signal++;
3349 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3351 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3352 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3353 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3354 int last_sig = ifmgd->last_ave_beacon_signal;
3355 struct ieee80211_event event = {
3360 * if signal crosses either of the boundaries, invoke callback
3361 * with appropriate parameters
3363 if (sig > ifmgd->rssi_max_thold &&
3364 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3365 ifmgd->last_ave_beacon_signal = sig;
3366 event.u.rssi.data = RSSI_EVENT_HIGH;
3367 drv_event_callback(local, sdata, &event);
3368 } else if (sig < ifmgd->rssi_min_thold &&
3369 (last_sig >= ifmgd->rssi_max_thold ||
3371 ifmgd->last_ave_beacon_signal = sig;
3372 event.u.rssi.data = RSSI_EVENT_LOW;
3373 drv_event_callback(local, sdata, &event);
3377 if (bss_conf->cqm_rssi_thold &&
3378 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3379 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3380 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3381 int last_event = ifmgd->last_cqm_event_signal;
3382 int thold = bss_conf->cqm_rssi_thold;
3383 int hyst = bss_conf->cqm_rssi_hyst;
3386 (last_event == 0 || sig < last_event - hyst)) {
3387 ifmgd->last_cqm_event_signal = sig;
3388 ieee80211_cqm_rssi_notify(
3390 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3392 } else if (sig > thold &&
3393 (last_event == 0 || sig > last_event + hyst)) {
3394 ifmgd->last_cqm_event_signal = sig;
3395 ieee80211_cqm_rssi_notify(
3397 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3402 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3403 mlme_dbg_ratelimited(sdata,
3404 "cancelling AP probe due to a received beacon\n");
3405 ieee80211_reset_ap_probe(sdata);
3409 * Push the beacon loss detection into the future since
3410 * we are processing a beacon from the AP just now.
3412 ieee80211_sta_reset_beacon_monitor(sdata);
3414 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3415 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3416 len - baselen, false, &elems,
3417 care_about_ies, ncrc);
3419 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3420 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3421 if (local->hw.conf.dynamic_ps_timeout > 0) {
3422 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3423 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3424 ieee80211_hw_config(local,
3425 IEEE80211_CONF_CHANGE_PS);
3427 ieee80211_send_nullfunc(local, sdata, false);
3428 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3429 local->pspolling = true;
3432 * Here is assumed that the driver will be
3433 * able to send ps-poll frame and receive a
3434 * response even though power save mode is
3435 * enabled, but some drivers might require
3436 * to disable power save here. This needs
3437 * to be investigated.
3439 ieee80211_send_pspoll(local, sdata);
3443 if (sdata->vif.p2p) {
3444 struct ieee80211_p2p_noa_attr noa = {};
3447 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3449 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3450 (u8 *) &noa, sizeof(noa));
3452 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3453 /* valid noa_attr and index changed */
3454 sdata->u.mgd.p2p_noa_index = noa.index;
3455 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3456 changed |= BSS_CHANGED_P2P_PS;
3458 * make sure we update all information, the CRC
3459 * mechanism doesn't look at P2P attributes.
3461 ifmgd->beacon_crc_valid = false;
3463 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3464 /* noa_attr not found and we had valid noa_attr before */
3465 sdata->u.mgd.p2p_noa_index = -1;
3466 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3467 changed |= BSS_CHANGED_P2P_PS;
3468 ifmgd->beacon_crc_valid = false;
3472 if (ifmgd->csa_waiting_bcn)
3473 ieee80211_chswitch_post_beacon(sdata);
3476 * Update beacon timing and dtim count on every beacon appearance. This
3477 * will allow the driver to use the most updated values. Do it before
3478 * comparing this one with last received beacon.
3479 * IMPORTANT: These parameters would possibly be out of sync by the time
3480 * the driver will use them. The synchronized view is currently
3481 * guaranteed only in certain callbacks.
3483 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3484 sdata->vif.bss_conf.sync_tsf =
3485 le64_to_cpu(mgmt->u.beacon.timestamp);
3486 sdata->vif.bss_conf.sync_device_ts =
3487 rx_status->device_timestamp;
3489 sdata->vif.bss_conf.sync_dtim_count =
3490 elems.tim->dtim_count;
3492 sdata->vif.bss_conf.sync_dtim_count = 0;
3495 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3497 ifmgd->beacon_crc = ncrc;
3498 ifmgd->beacon_crc_valid = true;
3500 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3502 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3503 rx_status->device_timestamp,
3506 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3507 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3508 elems.wmm_param_len))
3509 changed |= BSS_CHANGED_QOS;
3512 * If we haven't had a beacon before, tell the driver about the
3513 * DTIM period (and beacon timing if desired) now.
3515 if (!ifmgd->have_beacon) {
3516 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3518 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3520 bss_conf->dtim_period = 1;
3522 changed |= BSS_CHANGED_BEACON_INFO;
3523 ifmgd->have_beacon = true;
3525 mutex_lock(&local->iflist_mtx);
3526 ieee80211_recalc_ps(local);
3527 mutex_unlock(&local->iflist_mtx);
3529 ieee80211_recalc_ps_vif(sdata);
3532 if (elems.erp_info) {
3534 erp_value = elems.erp_info[0];
3538 changed |= ieee80211_handle_bss_capability(sdata,
3539 le16_to_cpu(mgmt->u.beacon.capab_info),
3540 erp_valid, erp_value);
3542 mutex_lock(&local->sta_mtx);
3543 sta = sta_info_get(sdata, bssid);
3545 if (ieee80211_config_bw(sdata, sta,
3546 elems.ht_cap_elem, elems.ht_operation,
3547 elems.vht_operation, bssid, &changed)) {
3548 mutex_unlock(&local->sta_mtx);
3549 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3550 WLAN_REASON_DEAUTH_LEAVING,
3552 ieee80211_report_disconnect(sdata, deauth_buf,
3553 sizeof(deauth_buf), true,
3554 WLAN_REASON_DEAUTH_LEAVING);
3558 if (sta && elems.opmode_notif)
3559 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3560 rx_status->band, true);
3561 mutex_unlock(&local->sta_mtx);
3563 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3565 elems.country_elem_len,
3566 elems.pwr_constr_elem,
3567 elems.cisco_dtpc_elem);
3569 ieee80211_bss_info_change_notify(sdata, changed);
3572 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3573 struct sk_buff *skb)
3575 struct ieee80211_rx_status *rx_status;
3576 struct ieee80211_mgmt *mgmt;
3578 struct ieee802_11_elems elems;
3581 rx_status = (struct ieee80211_rx_status *) skb->cb;
3582 mgmt = (struct ieee80211_mgmt *) skb->data;
3583 fc = le16_to_cpu(mgmt->frame_control);
3587 switch (fc & IEEE80211_FCTL_STYPE) {
3588 case IEEE80211_STYPE_BEACON:
3589 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3591 case IEEE80211_STYPE_PROBE_RESP:
3592 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3594 case IEEE80211_STYPE_AUTH:
3595 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3597 case IEEE80211_STYPE_DEAUTH:
3598 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3600 case IEEE80211_STYPE_DISASSOC:
3601 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3603 case IEEE80211_STYPE_ASSOC_RESP:
3604 case IEEE80211_STYPE_REASSOC_RESP:
3605 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3607 case IEEE80211_STYPE_ACTION:
3608 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3609 ies_len = skb->len -
3610 offsetof(struct ieee80211_mgmt,
3611 u.action.u.chan_switch.variable);
3616 ieee802_11_parse_elems(
3617 mgmt->u.action.u.chan_switch.variable,
3618 ies_len, true, &elems);
3620 if (elems.parse_error)
3623 ieee80211_sta_process_chanswitch(sdata,
3625 rx_status->device_timestamp,
3627 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3628 ies_len = skb->len -
3629 offsetof(struct ieee80211_mgmt,
3630 u.action.u.ext_chan_switch.variable);
3635 ieee802_11_parse_elems(
3636 mgmt->u.action.u.ext_chan_switch.variable,
3637 ies_len, true, &elems);
3639 if (elems.parse_error)
3642 /* for the handling code pretend this was also an IE */
3643 elems.ext_chansw_ie =
3644 &mgmt->u.action.u.ext_chan_switch.data;
3646 ieee80211_sta_process_chanswitch(sdata,
3648 rx_status->device_timestamp,
3653 sdata_unlock(sdata);
3656 static void ieee80211_sta_timer(unsigned long data)
3658 struct ieee80211_sub_if_data *sdata =
3659 (struct ieee80211_sub_if_data *) data;
3661 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3664 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3665 u8 *bssid, u8 reason, bool tx)
3667 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3669 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3672 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3676 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3678 struct ieee80211_local *local = sdata->local;
3679 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3680 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3685 sdata_assert_lock(sdata);
3687 if (WARN_ON_ONCE(!auth_data))
3692 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3693 sdata_info(sdata, "authentication with %pM timed out\n",
3694 auth_data->bss->bssid);
3697 * Most likely AP is not in the range so remove the
3698 * bss struct for that AP.
3700 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3705 drv_mgd_prepare_tx(local, sdata);
3707 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3708 auth_data->bss->bssid, auth_data->tries,
3709 IEEE80211_AUTH_MAX_TRIES);
3711 auth_data->expected_transaction = 2;
3713 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3714 trans = auth_data->sae_trans;
3715 status = auth_data->sae_status;
3716 auth_data->expected_transaction = trans;
3719 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3720 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3721 IEEE80211_TX_INTFL_MLME_CONN_TX;
3723 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3724 auth_data->data, auth_data->data_len,
3725 auth_data->bss->bssid,
3726 auth_data->bss->bssid, NULL, 0, 0,
3729 if (tx_flags == 0) {
3730 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3731 auth_data->timeout_started = true;
3732 run_again(sdata, auth_data->timeout);
3734 auth_data->timeout =
3735 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3736 auth_data->timeout_started = true;
3737 run_again(sdata, auth_data->timeout);
3743 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3745 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3746 struct ieee80211_local *local = sdata->local;
3748 sdata_assert_lock(sdata);
3750 assoc_data->tries++;
3751 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3752 sdata_info(sdata, "association with %pM timed out\n",
3753 assoc_data->bss->bssid);
3756 * Most likely AP is not in the range so remove the
3757 * bss struct for that AP.
3759 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3764 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3765 assoc_data->bss->bssid, assoc_data->tries,
3766 IEEE80211_ASSOC_MAX_TRIES);
3767 ieee80211_send_assoc(sdata);
3769 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3770 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3771 assoc_data->timeout_started = true;
3772 run_again(sdata, assoc_data->timeout);
3774 assoc_data->timeout =
3775 round_jiffies_up(jiffies +
3776 IEEE80211_ASSOC_TIMEOUT_LONG);
3777 assoc_data->timeout_started = true;
3778 run_again(sdata, assoc_data->timeout);
3784 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3785 __le16 fc, bool acked)
3787 struct ieee80211_local *local = sdata->local;
3789 sdata->u.mgd.status_fc = fc;
3790 sdata->u.mgd.status_acked = acked;
3791 sdata->u.mgd.status_received = true;
3793 ieee80211_queue_work(&local->hw, &sdata->work);
3796 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3798 struct ieee80211_local *local = sdata->local;
3799 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3803 if (ifmgd->status_received) {
3804 __le16 fc = ifmgd->status_fc;
3805 bool status_acked = ifmgd->status_acked;
3807 ifmgd->status_received = false;
3808 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3810 ifmgd->auth_data->timeout =
3811 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3812 run_again(sdata, ifmgd->auth_data->timeout);
3814 ifmgd->auth_data->timeout = jiffies - 1;
3816 ifmgd->auth_data->timeout_started = true;
3817 } else if (ifmgd->assoc_data &&
3818 (ieee80211_is_assoc_req(fc) ||
3819 ieee80211_is_reassoc_req(fc))) {
3821 ifmgd->assoc_data->timeout =
3822 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3823 run_again(sdata, ifmgd->assoc_data->timeout);
3825 ifmgd->assoc_data->timeout = jiffies - 1;
3827 ifmgd->assoc_data->timeout_started = true;
3831 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3832 time_after(jiffies, ifmgd->auth_data->timeout)) {
3833 if (ifmgd->auth_data->done) {
3835 * ok ... we waited for assoc but userspace didn't,
3836 * so let's just kill the auth data
3838 ieee80211_destroy_auth_data(sdata, false);
3839 } else if (ieee80211_auth(sdata)) {
3841 struct ieee80211_event event = {
3843 .u.mlme.data = AUTH_EVENT,
3844 .u.mlme.status = MLME_TIMEOUT,
3847 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3849 ieee80211_destroy_auth_data(sdata, false);
3851 cfg80211_auth_timeout(sdata->dev, bssid);
3852 drv_event_callback(sdata->local, sdata, &event);
3854 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3855 run_again(sdata, ifmgd->auth_data->timeout);
3857 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3858 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3859 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3860 ieee80211_do_assoc(sdata)) {
3861 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3862 struct ieee80211_event event = {
3864 .u.mlme.data = ASSOC_EVENT,
3865 .u.mlme.status = MLME_TIMEOUT,
3868 ieee80211_destroy_assoc_data(sdata, false);
3869 cfg80211_assoc_timeout(sdata->dev, bss);
3870 drv_event_callback(sdata->local, sdata, &event);
3872 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3873 run_again(sdata, ifmgd->assoc_data->timeout);
3875 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3876 ifmgd->associated) {
3880 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3882 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3883 max_tries = max_nullfunc_tries;
3885 max_tries = max_probe_tries;
3887 /* ACK received for nullfunc probing frame */
3888 if (!ifmgd->probe_send_count)
3889 ieee80211_reset_ap_probe(sdata);
3890 else if (ifmgd->nullfunc_failed) {
3891 if (ifmgd->probe_send_count < max_tries) {
3893 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3894 bssid, ifmgd->probe_send_count,
3896 ieee80211_mgd_probe_ap_send(sdata);
3899 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3901 ieee80211_sta_connection_lost(sdata, bssid,
3902 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3905 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3906 run_again(sdata, ifmgd->probe_timeout);
3907 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3909 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3910 bssid, probe_wait_ms);
3911 ieee80211_sta_connection_lost(sdata, bssid,
3912 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3913 } else if (ifmgd->probe_send_count < max_tries) {
3915 "No probe response from AP %pM after %dms, try %d/%i\n",
3916 bssid, probe_wait_ms,
3917 ifmgd->probe_send_count, max_tries);
3918 ieee80211_mgd_probe_ap_send(sdata);
3921 * We actually lost the connection ... or did we?
3924 wiphy_debug(local->hw.wiphy,
3925 "%s: No probe response from AP %pM"
3926 " after %dms, disconnecting.\n",
3928 bssid, probe_wait_ms);
3930 ieee80211_sta_connection_lost(sdata, bssid,
3931 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3935 sdata_unlock(sdata);
3938 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3940 struct ieee80211_sub_if_data *sdata =
3941 (struct ieee80211_sub_if_data *) data;
3942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3944 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3947 sdata->u.mgd.connection_loss = false;
3948 ieee80211_queue_work(&sdata->local->hw,
3949 &sdata->u.mgd.beacon_connection_loss_work);
3952 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3954 struct ieee80211_sub_if_data *sdata =
3955 (struct ieee80211_sub_if_data *) data;
3956 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3957 struct ieee80211_local *local = sdata->local;
3959 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3962 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3965 static void ieee80211_sta_monitor_work(struct work_struct *work)
3967 struct ieee80211_sub_if_data *sdata =
3968 container_of(work, struct ieee80211_sub_if_data,
3969 u.mgd.monitor_work);
3971 ieee80211_mgd_probe_ap(sdata, false);
3974 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3976 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3977 __ieee80211_stop_poll(sdata);
3979 /* let's probe the connection once */
3980 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
3981 ieee80211_queue_work(&sdata->local->hw,
3982 &sdata->u.mgd.monitor_work);
3983 /* and do all the other regular work too */
3984 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3989 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3992 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3996 if (ifmgd->auth_data || ifmgd->assoc_data) {
3997 const u8 *bssid = ifmgd->auth_data ?
3998 ifmgd->auth_data->bss->bssid :
3999 ifmgd->assoc_data->bss->bssid;
4002 * If we are trying to authenticate / associate while suspending,
4003 * cfg80211 won't know and won't actually abort those attempts,
4004 * thus we need to do that ourselves.
4006 ieee80211_send_deauth_disassoc(sdata, bssid,
4007 IEEE80211_STYPE_DEAUTH,
4008 WLAN_REASON_DEAUTH_LEAVING,
4010 if (ifmgd->assoc_data)
4011 ieee80211_destroy_assoc_data(sdata, false);
4012 if (ifmgd->auth_data)
4013 ieee80211_destroy_auth_data(sdata, false);
4014 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4015 IEEE80211_DEAUTH_FRAME_LEN);
4018 /* This is a bit of a hack - we should find a better and more generic
4019 * solution to this. Normally when suspending, cfg80211 will in fact
4020 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4021 * auth (not so important) or assoc (this is the problem) process.
4023 * As a consequence, it can happen that we are in the process of both
4024 * associating and suspending, and receive an association response
4025 * after cfg80211 has checked if it needs to disconnect, but before
4026 * we actually set the flag to drop incoming frames. This will then
4027 * cause the workqueue flush to process the association response in
4028 * the suspend, resulting in a successful association just before it
4029 * tries to remove the interface from the driver, which now though
4030 * has a channel context assigned ... this results in issues.
4032 * To work around this (for now) simply deauth here again if we're
4035 if (ifmgd->associated && !sdata->local->wowlan) {
4037 struct cfg80211_deauth_request req = {
4038 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4042 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4043 ieee80211_mgd_deauth(sdata, &req);
4046 sdata_unlock(sdata);
4049 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4051 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4054 if (!ifmgd->associated) {
4055 sdata_unlock(sdata);
4059 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4060 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4061 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4062 ieee80211_sta_connection_lost(sdata,
4063 ifmgd->associated->bssid,
4064 WLAN_REASON_UNSPECIFIED,
4066 sdata_unlock(sdata);
4069 sdata_unlock(sdata);
4073 /* interface setup */
4074 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4076 struct ieee80211_if_managed *ifmgd;
4078 ifmgd = &sdata->u.mgd;
4079 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4080 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4081 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4082 ieee80211_beacon_connection_loss_work);
4083 INIT_WORK(&ifmgd->csa_connection_drop_work,
4084 ieee80211_csa_connection_drop_work);
4085 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4086 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4087 ieee80211_tdls_peer_del_work);
4088 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4089 (unsigned long) sdata);
4090 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4091 (unsigned long) sdata);
4092 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4093 (unsigned long) sdata);
4094 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4095 (unsigned long) sdata);
4096 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4097 ieee80211_sta_handle_tspec_ac_params_wk);
4100 ifmgd->powersave = sdata->wdev.ps;
4101 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4102 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4103 ifmgd->p2p_noa_index = -1;
4105 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4106 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4108 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4110 /* Setup TDLS data */
4111 spin_lock_init(&ifmgd->teardown_lock);
4112 ifmgd->teardown_skb = NULL;
4113 ifmgd->orig_teardown_skb = NULL;
4116 /* scan finished notification */
4117 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4119 struct ieee80211_sub_if_data *sdata;
4121 /* Restart STA timers */
4123 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4124 if (ieee80211_sdata_running(sdata))
4125 ieee80211_restart_sta_timer(sdata);
4130 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4131 struct cfg80211_bss *cbss)
4133 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4134 const u8 *ht_cap_ie, *vht_cap_ie;
4135 const struct ieee80211_ht_cap *ht_cap;
4136 const struct ieee80211_vht_cap *vht_cap;
4139 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4142 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4143 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4144 ht_cap = (void *)(ht_cap_ie + 2);
4145 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4147 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4148 * "Tx Unequal Modulation Supported" fields.
4152 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4155 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4156 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4160 vht_cap = (void *)(vht_cap_ie + 2);
4161 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4162 for (nss = 8; nss > 0; nss--) {
4163 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4164 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4167 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4168 chains = max(chains, nss);
4174 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4175 struct cfg80211_bss *cbss)
4177 struct ieee80211_local *local = sdata->local;
4178 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4179 const struct ieee80211_ht_cap *ht_cap = NULL;
4180 const struct ieee80211_ht_operation *ht_oper = NULL;
4181 const struct ieee80211_vht_operation *vht_oper = NULL;
4182 struct ieee80211_supported_band *sband;
4183 struct cfg80211_chan_def chandef;
4188 sband = local->hw.wiphy->bands[cbss->channel->band];
4190 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4191 IEEE80211_STA_DISABLE_80P80MHZ |
4192 IEEE80211_STA_DISABLE_160MHZ);
4196 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4197 sband->ht_cap.ht_supported) {
4198 const u8 *ht_oper_ie, *ht_cap_ie;
4200 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4201 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4202 ht_oper = (void *)(ht_oper_ie + 2);
4204 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4205 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4206 ht_cap = (void *)(ht_cap_ie + 2);
4209 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4214 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4215 sband->vht_cap.vht_supported) {
4216 const u8 *vht_oper_ie, *vht_cap;
4218 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4219 WLAN_EID_VHT_OPERATION);
4220 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4221 vht_oper = (void *)(vht_oper_ie + 2);
4222 if (vht_oper && !ht_oper) {
4225 "AP advertised VHT without HT, disabling both\n");
4226 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4227 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4230 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4231 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4232 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4237 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4239 for (i = 0; i < sband->n_channels; i++) {
4240 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4241 IEEE80211_CHAN_NO_80MHZ))
4249 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4251 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4253 ht_cap, ht_oper, vht_oper,
4256 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4261 /* will change later if needed */
4262 sdata->smps_mode = IEEE80211_SMPS_OFF;
4264 mutex_lock(&local->mtx);
4266 * If this fails (possibly due to channel context sharing
4267 * on incompatible channels, e.g. 80+80 and 160 sharing the
4268 * same control channel) try to use a smaller bandwidth.
4270 ret = ieee80211_vif_use_channel(sdata, &chandef,
4271 IEEE80211_CHANCTX_SHARED);
4273 /* don't downgrade for 5 and 10 MHz channels, though. */
4274 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4275 chandef.width == NL80211_CHAN_WIDTH_10)
4278 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4279 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4280 ret = ieee80211_vif_use_channel(sdata, &chandef,
4281 IEEE80211_CHANCTX_SHARED);
4284 mutex_unlock(&local->mtx);
4288 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4289 struct cfg80211_bss *cbss, bool assoc,
4292 struct ieee80211_local *local = sdata->local;
4293 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4294 struct ieee80211_bss *bss = (void *)cbss->priv;
4295 struct sta_info *new_sta = NULL;
4296 struct ieee80211_supported_band *sband;
4297 bool have_sta = false;
4300 sband = local->hw.wiphy->bands[cbss->channel->band];
4302 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4307 have_sta = sta_info_get(sdata, cbss->bssid);
4312 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4317 if (new_sta || override) {
4318 err = ieee80211_prep_channel(sdata, cbss);
4321 sta_info_free(local, new_sta);
4327 u32 rates = 0, basic_rates = 0;
4328 bool have_higher_than_11mbit;
4329 int min_rate = INT_MAX, min_rate_index = -1;
4330 struct ieee80211_chanctx_conf *chanctx_conf;
4331 const struct cfg80211_bss_ies *ies;
4332 int shift = ieee80211_vif_get_shift(&sdata->vif);
4336 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4337 if (WARN_ON(!chanctx_conf)) {
4339 sta_info_free(local, new_sta);
4342 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4345 ieee80211_get_rates(sband, bss->supp_rates,
4346 bss->supp_rates_len,
4347 &rates, &basic_rates,
4348 &have_higher_than_11mbit,
4349 &min_rate, &min_rate_index,
4353 * This used to be a workaround for basic rates missing
4354 * in the association response frame. Now that we no
4355 * longer use the basic rates from there, it probably
4356 * doesn't happen any more, but keep the workaround so
4357 * in case some *other* APs are buggy in different ways
4358 * we can connect -- with a warning.
4360 if (!basic_rates && min_rate_index >= 0) {
4362 "No basic rates, using min rate instead\n");
4363 basic_rates = BIT(min_rate_index);
4366 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4367 sdata->vif.bss_conf.basic_rates = basic_rates;
4369 /* cf. IEEE 802.11 9.2.12 */
4370 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4371 have_higher_than_11mbit)
4372 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4374 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4376 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4378 /* set timing information */
4379 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4381 ies = rcu_dereference(cbss->beacon_ies);
4385 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4386 sdata->vif.bss_conf.sync_device_ts =
4387 bss->device_ts_beacon;
4388 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4389 ies->data, ies->len);
4390 if (tim_ie && tim_ie[1] >= 2)
4391 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4393 sdata->vif.bss_conf.sync_dtim_count = 0;
4394 } else if (!ieee80211_hw_check(&sdata->local->hw,
4395 TIMING_BEACON_ONLY)) {
4396 ies = rcu_dereference(cbss->proberesp_ies);
4397 /* must be non-NULL since beacon IEs were NULL */
4398 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4399 sdata->vif.bss_conf.sync_device_ts =
4400 bss->device_ts_presp;
4401 sdata->vif.bss_conf.sync_dtim_count = 0;
4403 sdata->vif.bss_conf.sync_tsf = 0;
4404 sdata->vif.bss_conf.sync_device_ts = 0;
4405 sdata->vif.bss_conf.sync_dtim_count = 0;
4409 /* tell driver about BSSID, basic rates and timing */
4410 ieee80211_bss_info_change_notify(sdata,
4411 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4412 BSS_CHANGED_BEACON_INT);
4415 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4417 err = sta_info_insert(new_sta);
4421 "failed to insert STA entry for the AP (error %d)\n",
4426 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4428 /* Cancel scan to ensure that nothing interferes with connection */
4429 if (local->scanning)
4430 ieee80211_scan_cancel(local);
4436 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4437 struct cfg80211_auth_request *req)
4439 struct ieee80211_local *local = sdata->local;
4440 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4441 struct ieee80211_mgd_auth_data *auth_data;
4445 /* prepare auth data structure */
4447 switch (req->auth_type) {
4448 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4449 auth_alg = WLAN_AUTH_OPEN;
4451 case NL80211_AUTHTYPE_SHARED_KEY:
4452 if (IS_ERR(local->wep_tx_tfm))
4454 auth_alg = WLAN_AUTH_SHARED_KEY;
4456 case NL80211_AUTHTYPE_FT:
4457 auth_alg = WLAN_AUTH_FT;
4459 case NL80211_AUTHTYPE_NETWORK_EAP:
4460 auth_alg = WLAN_AUTH_LEAP;
4462 case NL80211_AUTHTYPE_SAE:
4463 auth_alg = WLAN_AUTH_SAE;
4469 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4470 req->ie_len, GFP_KERNEL);
4474 auth_data->bss = req->bss;
4476 if (req->sae_data_len >= 4) {
4477 __le16 *pos = (__le16 *) req->sae_data;
4478 auth_data->sae_trans = le16_to_cpu(pos[0]);
4479 auth_data->sae_status = le16_to_cpu(pos[1]);
4480 memcpy(auth_data->data, req->sae_data + 4,
4481 req->sae_data_len - 4);
4482 auth_data->data_len += req->sae_data_len - 4;
4485 if (req->ie && req->ie_len) {
4486 memcpy(&auth_data->data[auth_data->data_len],
4487 req->ie, req->ie_len);
4488 auth_data->data_len += req->ie_len;
4491 if (req->key && req->key_len) {
4492 auth_data->key_len = req->key_len;
4493 auth_data->key_idx = req->key_idx;
4494 memcpy(auth_data->key, req->key, req->key_len);
4497 auth_data->algorithm = auth_alg;
4499 /* try to authenticate/probe */
4501 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4502 ifmgd->assoc_data) {
4507 if (ifmgd->auth_data)
4508 ieee80211_destroy_auth_data(sdata, false);
4510 /* prep auth_data so we don't go into idle on disassoc */
4511 ifmgd->auth_data = auth_data;
4513 if (ifmgd->associated) {
4514 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4516 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4517 WLAN_REASON_UNSPECIFIED,
4520 ieee80211_report_disconnect(sdata, frame_buf,
4521 sizeof(frame_buf), true,
4522 WLAN_REASON_UNSPECIFIED);
4525 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4527 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4531 err = ieee80211_auth(sdata);
4533 sta_info_destroy_addr(sdata, req->bss->bssid);
4537 /* hold our own reference */
4538 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4542 eth_zero_addr(ifmgd->bssid);
4543 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4544 ifmgd->auth_data = NULL;
4545 mutex_lock(&sdata->local->mtx);
4546 ieee80211_vif_release_channel(sdata);
4547 mutex_unlock(&sdata->local->mtx);
4553 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4554 const u8 *wmm_param, int len)
4562 if (wmm_param[5] != 1 /* version */)
4565 pos = wmm_param + 8;
4568 for (; left >= 4; left -= 4, pos += 4) {
4569 u8 ecwmin = pos[1] & 0x0f;
4570 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4571 int aci = (pos[0] >> 5) & 0x03;
4573 if (ecwmin > ecwmax) {
4575 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4576 ecwmin, ecwmax, aci);
4584 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4585 struct cfg80211_assoc_request *req)
4587 struct ieee80211_local *local = sdata->local;
4588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4589 struct ieee80211_bss *bss = (void *)req->bss->priv;
4590 struct ieee80211_mgd_assoc_data *assoc_data;
4591 const struct cfg80211_bss_ies *beacon_ies;
4592 struct ieee80211_supported_band *sband;
4593 const u8 *ssidie, *ht_ie, *vht_ie;
4595 bool override = false;
4597 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4602 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4608 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4609 assoc_data->ssid_len = ssidie[1];
4612 if (ifmgd->associated) {
4613 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4615 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4616 WLAN_REASON_UNSPECIFIED,
4619 ieee80211_report_disconnect(sdata, frame_buf,
4620 sizeof(frame_buf), true,
4621 WLAN_REASON_UNSPECIFIED);
4624 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4629 if (ifmgd->assoc_data) {
4634 if (ifmgd->auth_data) {
4637 /* keep sta info, bssid if matching */
4638 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4639 ieee80211_destroy_auth_data(sdata, match);
4642 /* prepare assoc data */
4644 ifmgd->beacon_crc_valid = false;
4646 assoc_data->wmm = bss->wmm_used &&
4647 (local->hw.queues >= IEEE80211_NUM_ACS);
4648 if (assoc_data->wmm) {
4649 /* try to check validity of WMM params IE */
4650 const struct cfg80211_bss_ies *ies;
4651 const u8 *wp, *start, *end;
4654 ies = rcu_dereference(req->bss->ies);
4656 end = start + ies->len;
4659 wp = cfg80211_find_vendor_ie(
4661 WLAN_OUI_TYPE_MICROSOFT_WMM,
4662 start, end - start);
4665 start = wp + wp[1] + 2;
4666 /* if this IE is too short, try the next */
4669 /* if this IE is WMM params, we found what we wanted */
4674 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4676 assoc_data->wmm = false;
4677 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4683 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4684 * We still associate in non-HT mode (11a/b/g) if any one of these
4685 * ciphers is configured as pairwise.
4686 * We can set this to true for non-11n hardware, that'll be checked
4687 * separately along with the peer capabilities.
4689 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4690 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4691 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4692 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4693 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4694 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4695 netdev_info(sdata->dev,
4696 "disabling HT/VHT due to WEP/TKIP use\n");
4700 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4701 sband = local->hw.wiphy->bands[req->bss->channel->band];
4702 if (!sband->ht_cap.ht_supported ||
4703 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4704 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4705 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4706 if (!bss->wmm_used &&
4707 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4708 netdev_info(sdata->dev,
4709 "disabling HT as WMM/QoS is not supported by the AP\n");
4712 /* disable VHT if we don't support it or the AP doesn't use WMM */
4713 if (!sband->vht_cap.vht_supported ||
4714 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4715 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4716 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4717 if (!bss->wmm_used &&
4718 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4719 netdev_info(sdata->dev,
4720 "disabling VHT as WMM/QoS is not supported by the AP\n");
4723 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4724 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4725 sizeof(ifmgd->ht_capa_mask));
4727 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4728 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4729 sizeof(ifmgd->vht_capa_mask));
4731 if (req->ie && req->ie_len) {
4732 memcpy(assoc_data->ie, req->ie, req->ie_len);
4733 assoc_data->ie_len = req->ie_len;
4736 assoc_data->bss = req->bss;
4738 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4739 if (ifmgd->powersave)
4740 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4742 sdata->smps_mode = IEEE80211_SMPS_OFF;
4744 sdata->smps_mode = ifmgd->req_smps;
4746 assoc_data->capability = req->bss->capability;
4747 assoc_data->supp_rates = bss->supp_rates;
4748 assoc_data->supp_rates_len = bss->supp_rates_len;
4751 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4752 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4753 assoc_data->ap_ht_param =
4754 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4756 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4757 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4758 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4759 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4760 sizeof(struct ieee80211_vht_cap));
4762 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4765 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4766 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4767 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4768 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4770 if (bss->wmm_used && bss->uapsd_supported &&
4771 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4772 assoc_data->uapsd = true;
4773 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4775 assoc_data->uapsd = false;
4776 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4779 if (req->prev_bssid)
4780 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4783 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4784 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4786 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4787 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4790 if (req->flags & ASSOC_REQ_USE_RRM)
4791 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4793 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4795 if (req->crypto.control_port)
4796 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4798 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4800 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4801 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4802 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4805 /* kick off associate process */
4807 ifmgd->assoc_data = assoc_data;
4808 ifmgd->dtim_period = 0;
4809 ifmgd->have_beacon = false;
4811 /* override HT/VHT configuration only if the AP and we support it */
4812 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4813 struct ieee80211_sta_ht_cap sta_ht_cap;
4815 if (req->flags & ASSOC_REQ_DISABLE_HT)
4818 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4819 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4821 /* check for 40 MHz disable override */
4822 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4823 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4824 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4827 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4828 req->flags & ASSOC_REQ_DISABLE_VHT)
4832 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4833 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4834 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4837 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4838 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4840 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4845 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4847 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4850 * Wait up to one beacon interval ...
4851 * should this be more if we miss one?
4853 sdata_info(sdata, "waiting for beacon from %pM\n",
4855 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4856 assoc_data->timeout_started = true;
4857 assoc_data->need_beacon = true;
4858 } else if (beacon_ies) {
4859 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4864 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4865 const struct ieee80211_tim_ie *tim;
4866 tim = (void *)(tim_ie + 2);
4867 ifmgd->dtim_period = tim->dtim_period;
4868 dtim_count = tim->dtim_count;
4870 ifmgd->have_beacon = true;
4871 assoc_data->timeout = jiffies;
4872 assoc_data->timeout_started = true;
4874 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4875 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4876 sdata->vif.bss_conf.sync_device_ts =
4877 bss->device_ts_beacon;
4878 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4881 assoc_data->timeout = jiffies;
4882 assoc_data->timeout_started = true;
4886 run_again(sdata, assoc_data->timeout);
4888 if (bss->corrupt_data) {
4889 char *corrupt_type = "data";
4890 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4891 if (bss->corrupt_data &
4892 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4893 corrupt_type = "beacon and probe response";
4895 corrupt_type = "beacon";
4896 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4897 corrupt_type = "probe response";
4898 sdata_info(sdata, "associating with AP with corrupt %s\n",
4904 eth_zero_addr(ifmgd->bssid);
4905 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4906 ifmgd->assoc_data = NULL;
4912 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4913 struct cfg80211_deauth_request *req)
4915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4916 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4917 bool tx = !req->local_state_change;
4919 if (ifmgd->auth_data &&
4920 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4922 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4923 req->bssid, req->reason_code,
4924 ieee80211_get_reason_code_string(req->reason_code));
4926 drv_mgd_prepare_tx(sdata->local, sdata);
4927 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4928 IEEE80211_STYPE_DEAUTH,
4929 req->reason_code, tx,
4931 ieee80211_destroy_auth_data(sdata, false);
4932 ieee80211_report_disconnect(sdata, frame_buf,
4933 sizeof(frame_buf), true,
4939 if (ifmgd->assoc_data &&
4940 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4942 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4943 req->bssid, req->reason_code,
4944 ieee80211_get_reason_code_string(req->reason_code));
4946 drv_mgd_prepare_tx(sdata->local, sdata);
4947 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4948 IEEE80211_STYPE_DEAUTH,
4949 req->reason_code, tx,
4951 ieee80211_destroy_assoc_data(sdata, false);
4952 ieee80211_report_disconnect(sdata, frame_buf,
4953 sizeof(frame_buf), true,
4958 if (ifmgd->associated &&
4959 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4961 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4962 req->bssid, req->reason_code,
4963 ieee80211_get_reason_code_string(req->reason_code));
4965 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4966 req->reason_code, tx, frame_buf);
4967 ieee80211_report_disconnect(sdata, frame_buf,
4968 sizeof(frame_buf), true,
4976 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4977 struct cfg80211_disassoc_request *req)
4979 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4981 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4984 * cfg80211 should catch this ... but it's racy since
4985 * we can receive a disassoc frame, process it, hand it
4986 * to cfg80211 while that's in a locked section already
4987 * trying to tell us that the user wants to disconnect.
4989 if (ifmgd->associated != req->bss)
4993 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4994 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4996 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4997 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4998 req->reason_code, !req->local_state_change,
5001 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5007 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5012 * Make sure some work items will not run after this,
5013 * they will not do anything but might not have been
5014 * cancelled when disconnecting.
5016 cancel_work_sync(&ifmgd->monitor_work);
5017 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5018 cancel_work_sync(&ifmgd->request_smps_work);
5019 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5020 cancel_work_sync(&ifmgd->chswitch_work);
5021 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5024 if (ifmgd->assoc_data) {
5025 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5026 ieee80211_destroy_assoc_data(sdata, false);
5027 cfg80211_assoc_timeout(sdata->dev, bss);
5029 if (ifmgd->auth_data)
5030 ieee80211_destroy_auth_data(sdata, false);
5031 spin_lock_bh(&ifmgd->teardown_lock);
5032 if (ifmgd->teardown_skb) {
5033 kfree_skb(ifmgd->teardown_skb);
5034 ifmgd->teardown_skb = NULL;
5035 ifmgd->orig_teardown_skb = NULL;
5037 spin_unlock_bh(&ifmgd->teardown_lock);
5038 del_timer_sync(&ifmgd->timer);
5039 sdata_unlock(sdata);
5042 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5043 enum nl80211_cqm_rssi_threshold_event rssi_event,
5046 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5048 trace_api_cqm_rssi_notify(sdata, rssi_event);
5050 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5052 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5054 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5056 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5058 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5060 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5062 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);