2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
35 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36 #define IEEE80211_AUTH_MAX_TRIES 3
37 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
40 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41 #define IEEE80211_ASSOC_MAX_TRIES 3
43 static int max_nullfunc_tries = 2;
44 module_param(max_nullfunc_tries, int, 0644);
45 MODULE_PARM_DESC(max_nullfunc_tries,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48 static int max_probe_tries = 5;
49 module_param(max_probe_tries, int, 0644);
50 MODULE_PARM_DESC(max_probe_tries,
51 "Maximum probe tries before disconnecting (reason 4).");
54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
61 static int beacon_loss_count = 7;
62 module_param(beacon_loss_count, int, 0644);
63 MODULE_PARM_DESC(beacon_loss_count,
64 "Number of beacon intervals before we decide beacon was lost.");
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
70 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
76 static int probe_wait_ms = 500;
77 module_param(probe_wait_ms, int, 0644);
78 MODULE_PARM_DESC(probe_wait_ms,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
87 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
105 static void run_again(struct ieee80211_sub_if_data *sdata,
106 unsigned long timeout)
108 sdata_assert_lock(sdata);
110 if (!timer_pending(&sdata->u.mgd.timer) ||
111 time_before(timeout, sdata->u.mgd.timer.expires))
112 mod_timer(&sdata->u.mgd.timer, timeout);
115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
117 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
120 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
123 mod_timer(&sdata->u.mgd.bcn_mon_timer,
124 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131 if (unlikely(!sdata->u.mgd.associated))
134 ifmgd->probe_send_count = 0;
136 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
139 mod_timer(&sdata->u.mgd.conn_mon_timer,
140 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
143 static int ecw2cw(int ecw)
145 return (1 << ecw) - 1;
149 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
150 struct ieee80211_supported_band *sband,
151 struct ieee80211_channel *channel,
152 const struct ieee80211_ht_operation *ht_oper,
153 const struct ieee80211_vht_operation *vht_oper,
154 struct cfg80211_chan_def *chandef, bool tracking)
156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157 struct cfg80211_chan_def vht_chandef;
160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
165 if (!ht_oper || !sband->ht_cap.ht_supported) {
166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
170 chandef->width = NL80211_CHAN_WIDTH_20;
172 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
174 /* check that channel matches the right operating channel */
175 if (!tracking && channel->center_freq != ht_cfreq) {
177 * It's possible that some APs are confused here;
178 * Netgear WNDR3700 sometimes reports 4 higher than
179 * the actual channel in association responses, but
180 * since we look at probe response/beacon data here
184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
185 channel->center_freq, ht_cfreq,
186 ht_oper->primary_chan, channel->band);
187 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
191 /* check 40 MHz support, if we have it */
192 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
193 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
194 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
195 chandef->width = NL80211_CHAN_WIDTH_40;
196 chandef->center_freq1 += 10;
198 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
199 chandef->width = NL80211_CHAN_WIDTH_40;
200 chandef->center_freq1 -= 10;
204 /* 40 MHz (and 80 MHz) must be supported for VHT */
205 ret = IEEE80211_STA_DISABLE_VHT;
206 /* also mark 40 MHz disabled */
207 ret |= IEEE80211_STA_DISABLE_40MHZ;
211 if (!vht_oper || !sband->vht_cap.vht_supported) {
212 ret = IEEE80211_STA_DISABLE_VHT;
216 vht_chandef.chan = channel;
217 vht_chandef.center_freq1 =
218 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
220 vht_chandef.center_freq2 = 0;
222 switch (vht_oper->chan_width) {
223 case IEEE80211_VHT_CHANWIDTH_USE_HT:
224 vht_chandef.width = chandef->width;
225 vht_chandef.center_freq1 = chandef->center_freq1;
227 case IEEE80211_VHT_CHANWIDTH_80MHZ:
228 vht_chandef.width = NL80211_CHAN_WIDTH_80;
230 case IEEE80211_VHT_CHANWIDTH_160MHZ:
231 vht_chandef.width = NL80211_CHAN_WIDTH_160;
233 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
234 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
235 vht_chandef.center_freq2 =
236 ieee80211_channel_to_frequency(
237 vht_oper->center_freq_seg2_idx,
241 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
243 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
244 vht_oper->chan_width);
245 ret = IEEE80211_STA_DISABLE_VHT;
249 if (!cfg80211_chandef_valid(&vht_chandef)) {
250 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
252 "AP VHT information is invalid, disable VHT\n");
253 ret = IEEE80211_STA_DISABLE_VHT;
257 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
262 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
265 "AP VHT information doesn't match HT, disable VHT\n");
266 ret = IEEE80211_STA_DISABLE_VHT;
270 *chandef = vht_chandef;
276 * When tracking the current AP, don't do any further checks if the
277 * new chandef is identical to the one we're currently using for the
278 * connection. This keeps us from playing ping-pong with regulatory,
279 * without it the following can happen (for example):
280 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
281 * - AP advertises regdom US
282 * - CRDA loads regdom US with 80 MHz prohibited (old database)
283 * - the code below detects an unsupported channel, downgrades, and
284 * we disconnect from the AP in the caller
285 * - disconnect causes CRDA to reload world regdomain and the game
287 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
289 * It seems possible that there are still scenarios with CSA or real
290 * bandwidth changes where a this could happen, but those cases are
291 * less common and wouldn't completely prevent using the AP.
294 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
297 /* don't print the message below for VHT mismatch if VHT is disabled */
298 if (ret & IEEE80211_STA_DISABLE_VHT)
299 vht_chandef = *chandef;
302 * Ignore the DISABLED flag when we're already connected and only
303 * tracking the APs beacon for bandwidth changes - otherwise we
304 * might get disconnected here if we connect to an AP, update our
305 * regulatory information based on the AP's country IE and the
306 * information we have is wrong/outdated and disables the channel
307 * that we're actually using for the connection to the AP.
309 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
311 IEEE80211_CHAN_DISABLED)) {
312 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
313 ret = IEEE80211_STA_DISABLE_HT |
314 IEEE80211_STA_DISABLE_VHT;
318 ret |= ieee80211_chandef_downgrade(chandef);
321 if (chandef->width != vht_chandef.width && !tracking)
323 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
325 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
329 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
330 struct sta_info *sta,
331 const struct ieee80211_ht_operation *ht_oper,
332 const struct ieee80211_vht_operation *vht_oper,
333 const u8 *bssid, u32 *changed)
335 struct ieee80211_local *local = sdata->local;
336 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
337 struct ieee80211_supported_band *sband;
338 struct ieee80211_channel *chan;
339 struct cfg80211_chan_def chandef;
342 enum ieee80211_sta_rx_bandwidth new_sta_bw;
345 /* if HT was/is disabled, don't track any bandwidth changes */
346 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
349 /* don't check VHT if we associated as non-VHT station */
350 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
353 if (WARN_ON_ONCE(!sta))
357 * if bss configuration changed store the new one -
358 * this may be applicable even if channel is identical
360 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
361 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
362 *changed |= BSS_CHANGED_HT;
363 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
366 chan = sdata->vif.bss_conf.chandef.chan;
367 sband = local->hw.wiphy->bands[chan->band];
369 /* calculate new channel (type) based on HT/VHT operation IEs */
370 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
371 vht_oper, &chandef, true);
374 * Downgrade the new channel if we associated with restricted
375 * capabilities. For example, if we associated as a 20 MHz STA
376 * to a 40 MHz AP (due to regulatory, capabilities or config
377 * reasons) then switching to a 40 MHz channel now won't do us
378 * any good -- we couldn't use it with the AP.
380 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
381 chandef.width == NL80211_CHAN_WIDTH_80P80)
382 flags |= ieee80211_chandef_downgrade(&chandef);
383 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
384 chandef.width == NL80211_CHAN_WIDTH_160)
385 flags |= ieee80211_chandef_downgrade(&chandef);
386 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
387 chandef.width > NL80211_CHAN_WIDTH_20)
388 flags |= ieee80211_chandef_downgrade(&chandef);
390 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
394 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
395 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
396 chandef.center_freq1, chandef.center_freq2);
398 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
399 IEEE80211_STA_DISABLE_VHT |
400 IEEE80211_STA_DISABLE_40MHZ |
401 IEEE80211_STA_DISABLE_80P80MHZ |
402 IEEE80211_STA_DISABLE_160MHZ)) ||
403 !cfg80211_chandef_valid(&chandef)) {
405 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
410 switch (chandef.width) {
411 case NL80211_CHAN_WIDTH_20_NOHT:
412 case NL80211_CHAN_WIDTH_20:
413 new_sta_bw = IEEE80211_STA_RX_BW_20;
415 case NL80211_CHAN_WIDTH_40:
416 new_sta_bw = IEEE80211_STA_RX_BW_40;
418 case NL80211_CHAN_WIDTH_80:
419 new_sta_bw = IEEE80211_STA_RX_BW_80;
421 case NL80211_CHAN_WIDTH_80P80:
422 case NL80211_CHAN_WIDTH_160:
423 new_sta_bw = IEEE80211_STA_RX_BW_160;
429 if (new_sta_bw > sta->cur_max_bandwidth)
430 new_sta_bw = sta->cur_max_bandwidth;
432 if (new_sta_bw < sta->sta.bandwidth) {
433 sta->sta.bandwidth = new_sta_bw;
434 rate_control_rate_update(local, sband, sta,
435 IEEE80211_RC_BW_CHANGED);
438 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
441 "AP %pM changed bandwidth to incompatible one - disconnect\n",
446 if (new_sta_bw > sta->sta.bandwidth) {
447 sta->sta.bandwidth = new_sta_bw;
448 rate_control_rate_update(local, sband, sta,
449 IEEE80211_RC_BW_CHANGED);
455 /* frame sending functions */
457 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
458 struct sk_buff *skb, u8 ap_ht_param,
459 struct ieee80211_supported_band *sband,
460 struct ieee80211_channel *channel,
461 enum ieee80211_smps_mode smps)
464 u32 flags = channel->flags;
466 struct ieee80211_sta_ht_cap ht_cap;
468 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
470 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
471 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
473 /* determine capability flags */
476 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
477 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
478 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
479 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
480 cap &= ~IEEE80211_HT_CAP_SGI_40;
483 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
484 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
485 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
486 cap &= ~IEEE80211_HT_CAP_SGI_40;
492 * If 40 MHz was disabled associate as though we weren't
493 * capable of 40 MHz -- some broken APs will never fall
494 * back to trying to transmit in 20 MHz.
496 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
497 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
498 cap &= ~IEEE80211_HT_CAP_SGI_40;
501 /* set SM PS mode properly */
502 cap &= ~IEEE80211_HT_CAP_SM_PS;
504 case IEEE80211_SMPS_AUTOMATIC:
505 case IEEE80211_SMPS_NUM_MODES:
507 case IEEE80211_SMPS_OFF:
508 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
509 IEEE80211_HT_CAP_SM_PS_SHIFT;
511 case IEEE80211_SMPS_STATIC:
512 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
513 IEEE80211_HT_CAP_SM_PS_SHIFT;
515 case IEEE80211_SMPS_DYNAMIC:
516 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
517 IEEE80211_HT_CAP_SM_PS_SHIFT;
521 /* reserve and fill IE */
522 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
523 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
526 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
528 struct ieee80211_supported_band *sband,
529 struct ieee80211_vht_cap *ap_vht_cap)
533 struct ieee80211_sta_vht_cap vht_cap;
534 u32 mask, ap_bf_sts, our_bf_sts;
536 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
538 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
539 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
541 /* determine capability flags */
544 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
545 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
546 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
549 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
550 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
551 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
555 * Some APs apparently get confused if our capabilities are better
556 * than theirs, so restrict what we advertise in the assoc request.
558 if (!(ap_vht_cap->vht_cap_info &
559 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
560 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
562 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
564 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
565 our_bf_sts = cap & mask;
567 if (ap_bf_sts < our_bf_sts) {
572 /* reserve and fill IE */
573 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
574 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
577 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
579 struct ieee80211_local *local = sdata->local;
580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
581 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
583 struct ieee80211_mgmt *mgmt;
585 size_t offset = 0, noffset;
586 int i, count, rates_len, supp_rates_len, shift;
588 struct ieee80211_supported_band *sband;
589 struct ieee80211_chanctx_conf *chanctx_conf;
590 struct ieee80211_channel *chan;
591 u32 rate_flags, rates = 0;
593 sdata_assert_lock(sdata);
596 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
597 if (WARN_ON(!chanctx_conf)) {
601 chan = chanctx_conf->def.chan;
602 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
604 sband = local->hw.wiphy->bands[chan->band];
605 shift = ieee80211_vif_get_shift(&sdata->vif);
607 if (assoc_data->supp_rates_len) {
609 * Get all rates supported by the device and the AP as
610 * some APs don't like getting a superset of their rates
611 * in the association request (e.g. D-Link DAP 1353 in
614 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
615 assoc_data->supp_rates,
616 assoc_data->supp_rates_len,
620 * In case AP not provide any supported rates information
621 * before association, we send information element(s) with
622 * all rates that we support.
625 for (i = 0; i < sband->n_bitrates; i++) {
626 if ((rate_flags & sband->bitrates[i].flags)
634 skb = alloc_skb(local->hw.extra_tx_headroom +
635 sizeof(*mgmt) + /* bit too much but doesn't matter */
636 2 + assoc_data->ssid_len + /* SSID */
637 4 + rates_len + /* (extended) rates */
638 4 + /* power capability */
639 2 + 2 * sband->n_channels + /* supported channels */
640 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
641 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
642 assoc_data->ie_len + /* extra IEs */
648 skb_reserve(skb, local->hw.extra_tx_headroom);
650 capab = WLAN_CAPABILITY_ESS;
652 if (sband->band == IEEE80211_BAND_2GHZ) {
653 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
654 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
655 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
656 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
659 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
660 capab |= WLAN_CAPABILITY_PRIVACY;
662 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
663 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
664 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
666 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
668 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
669 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
670 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
672 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
674 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
675 IEEE80211_STYPE_REASSOC_REQ);
676 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
677 mgmt->u.reassoc_req.listen_interval =
678 cpu_to_le16(local->hw.conf.listen_interval);
679 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
683 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
684 IEEE80211_STYPE_ASSOC_REQ);
685 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
686 mgmt->u.assoc_req.listen_interval =
687 cpu_to_le16(local->hw.conf.listen_interval);
691 pos = skb_put(skb, 2 + assoc_data->ssid_len);
692 *pos++ = WLAN_EID_SSID;
693 *pos++ = assoc_data->ssid_len;
694 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
696 /* add all rates which were marked to be used above */
697 supp_rates_len = rates_len;
698 if (supp_rates_len > 8)
701 pos = skb_put(skb, supp_rates_len + 2);
702 *pos++ = WLAN_EID_SUPP_RATES;
703 *pos++ = supp_rates_len;
706 for (i = 0; i < sband->n_bitrates; i++) {
707 if (BIT(i) & rates) {
708 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
716 if (rates_len > count) {
717 pos = skb_put(skb, rates_len - count + 2);
718 *pos++ = WLAN_EID_EXT_SUPP_RATES;
719 *pos++ = rates_len - count;
721 for (i++; i < sband->n_bitrates; i++) {
722 if (BIT(i) & rates) {
724 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
731 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
732 /* 1. power capabilities */
733 pos = skb_put(skb, 4);
734 *pos++ = WLAN_EID_PWR_CAPABILITY;
736 *pos++ = 0; /* min tx power */
738 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
740 /* 2. supported channels */
741 /* TODO: get this in reg domain format */
742 pos = skb_put(skb, 2 * sband->n_channels + 2);
743 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
744 *pos++ = 2 * sband->n_channels;
745 for (i = 0; i < sband->n_channels; i++) {
746 *pos++ = ieee80211_frequency_to_channel(
747 sband->channels[i].center_freq);
748 *pos++ = 1; /* one channel in the subband*/
752 /* if present, add any custom IEs that go before HT */
753 if (assoc_data->ie_len) {
754 static const u8 before_ht[] = {
757 WLAN_EID_EXT_SUPP_RATES,
758 WLAN_EID_PWR_CAPABILITY,
759 WLAN_EID_SUPPORTED_CHANNELS,
762 WLAN_EID_RRM_ENABLED_CAPABILITIES,
763 WLAN_EID_MOBILITY_DOMAIN,
764 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
766 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
767 before_ht, ARRAY_SIZE(before_ht),
769 pos = skb_put(skb, noffset - offset);
770 memcpy(pos, assoc_data->ie + offset, noffset - offset);
774 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
775 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
776 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
778 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
779 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
780 sband, chan, sdata->smps_mode);
782 /* if present, add any custom IEs that go before VHT */
783 if (assoc_data->ie_len) {
784 static const u8 before_vht[] = {
787 WLAN_EID_EXT_SUPP_RATES,
788 WLAN_EID_PWR_CAPABILITY,
789 WLAN_EID_SUPPORTED_CHANNELS,
792 WLAN_EID_RRM_ENABLED_CAPABILITIES,
793 WLAN_EID_MOBILITY_DOMAIN,
794 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
795 WLAN_EID_HT_CAPABILITY,
796 WLAN_EID_BSS_COEX_2040,
797 WLAN_EID_EXT_CAPABILITY,
798 WLAN_EID_QOS_TRAFFIC_CAPA,
799 WLAN_EID_TIM_BCAST_REQ,
800 WLAN_EID_INTERWORKING,
802 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
803 before_vht, ARRAY_SIZE(before_vht),
805 pos = skb_put(skb, noffset - offset);
806 memcpy(pos, assoc_data->ie + offset, noffset - offset);
810 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
811 ieee80211_add_vht_ie(sdata, skb, sband,
812 &assoc_data->ap_vht_cap);
814 /* if present, add any custom non-vendor IEs that go after HT */
815 if (assoc_data->ie_len) {
816 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
819 pos = skb_put(skb, noffset - offset);
820 memcpy(pos, assoc_data->ie + offset, noffset - offset);
824 if (assoc_data->wmm) {
825 if (assoc_data->uapsd) {
826 qos_info = ifmgd->uapsd_queues;
827 qos_info |= (ifmgd->uapsd_max_sp_len <<
828 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
833 pos = skb_put(skb, 9);
834 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
835 *pos++ = 7; /* len */
836 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
839 *pos++ = 2; /* WME */
840 *pos++ = 0; /* WME info */
841 *pos++ = 1; /* WME ver */
845 /* add any remaining custom (i.e. vendor specific here) IEs */
846 if (assoc_data->ie_len) {
847 noffset = assoc_data->ie_len;
848 pos = skb_put(skb, noffset - offset);
849 memcpy(pos, assoc_data->ie + offset, noffset - offset);
852 drv_mgd_prepare_tx(local, sdata);
854 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
855 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
856 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
857 IEEE80211_TX_INTFL_MLME_CONN_TX;
858 ieee80211_tx_skb(sdata, skb);
861 void ieee80211_send_pspoll(struct ieee80211_local *local,
862 struct ieee80211_sub_if_data *sdata)
864 struct ieee80211_pspoll *pspoll;
867 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
871 pspoll = (struct ieee80211_pspoll *) skb->data;
872 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
874 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
875 ieee80211_tx_skb(sdata, skb);
878 void ieee80211_send_nullfunc(struct ieee80211_local *local,
879 struct ieee80211_sub_if_data *sdata,
883 struct ieee80211_hdr_3addr *nullfunc;
884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
886 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
890 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
892 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
894 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
895 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
897 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
898 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
900 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
901 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
903 ieee80211_tx_skb(sdata, skb);
906 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
907 struct ieee80211_sub_if_data *sdata)
910 struct ieee80211_hdr *nullfunc;
913 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
916 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
920 skb_reserve(skb, local->hw.extra_tx_headroom);
922 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
923 memset(nullfunc, 0, 30);
924 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
925 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
926 nullfunc->frame_control = fc;
927 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
928 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
929 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
930 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
933 ieee80211_tx_skb(sdata, skb);
936 /* spectrum management related things */
937 static void ieee80211_chswitch_work(struct work_struct *work)
939 struct ieee80211_sub_if_data *sdata =
940 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
941 struct ieee80211_local *local = sdata->local;
942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
945 if (!ieee80211_sdata_running(sdata))
949 mutex_lock(&local->mtx);
950 mutex_lock(&local->chanctx_mtx);
952 if (!ifmgd->associated)
955 if (!sdata->vif.csa_active)
959 * using reservation isn't immediate as it may be deferred until later
960 * with multi-vif. once reservation is complete it will re-schedule the
961 * work with no reserved_chanctx so verify chandef to check if it
962 * completed successfully
965 if (sdata->reserved_chanctx) {
967 * with multi-vif csa driver may call ieee80211_csa_finish()
968 * many times while waiting for other interfaces to use their
971 if (sdata->reserved_ready)
974 ret = ieee80211_vif_use_reserved_context(sdata);
977 "failed to use reserved channel context, disconnecting (err=%d)\n",
979 ieee80211_queue_work(&sdata->local->hw,
980 &ifmgd->csa_connection_drop_work);
987 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
988 &sdata->csa_chandef)) {
990 "failed to finalize channel switch, disconnecting\n");
991 ieee80211_queue_work(&sdata->local->hw,
992 &ifmgd->csa_connection_drop_work);
996 /* XXX: shouldn't really modify cfg80211-owned data! */
997 ifmgd->associated->channel = sdata->csa_chandef.chan;
999 sdata->vif.csa_active = false;
1001 /* XXX: wait for a beacon first? */
1002 if (sdata->csa_block_tx) {
1003 ieee80211_wake_vif_queues(local, sdata,
1004 IEEE80211_QUEUE_STOP_REASON_CSA);
1005 sdata->csa_block_tx = false;
1008 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1010 ieee80211_sta_reset_beacon_monitor(sdata);
1011 ieee80211_sta_reset_conn_monitor(sdata);
1014 mutex_unlock(&local->chanctx_mtx);
1015 mutex_unlock(&local->mtx);
1016 sdata_unlock(sdata);
1019 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1021 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1022 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1024 trace_api_chswitch_done(sdata, success);
1027 "driver channel switch failed, disconnecting\n");
1028 ieee80211_queue_work(&sdata->local->hw,
1029 &ifmgd->csa_connection_drop_work);
1031 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1034 EXPORT_SYMBOL(ieee80211_chswitch_done);
1036 static void ieee80211_chswitch_timer(unsigned long data)
1038 struct ieee80211_sub_if_data *sdata =
1039 (struct ieee80211_sub_if_data *) data;
1041 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1045 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1046 u64 timestamp, struct ieee802_11_elems *elems,
1049 struct ieee80211_local *local = sdata->local;
1050 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1051 struct cfg80211_bss *cbss = ifmgd->associated;
1052 struct ieee80211_chanctx_conf *conf;
1053 struct ieee80211_chanctx *chanctx;
1054 enum ieee80211_band current_band;
1055 struct ieee80211_csa_ie csa_ie;
1058 sdata_assert_lock(sdata);
1063 if (local->scanning)
1066 /* disregard subsequent announcements if we are already processing */
1067 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1070 current_band = cbss->channel->band;
1071 memset(&csa_ie, 0, sizeof(csa_ie));
1072 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1074 ifmgd->associated->bssid, &csa_ie);
1076 ieee80211_queue_work(&local->hw,
1077 &ifmgd->csa_connection_drop_work);
1081 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1082 IEEE80211_CHAN_DISABLED)) {
1084 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1085 ifmgd->associated->bssid,
1086 csa_ie.chandef.chan->center_freq,
1087 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1088 csa_ie.chandef.center_freq2);
1089 ieee80211_queue_work(&local->hw,
1090 &ifmgd->csa_connection_drop_work);
1094 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1096 mutex_lock(&local->mtx);
1097 mutex_lock(&local->chanctx_mtx);
1098 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1099 lockdep_is_held(&local->chanctx_mtx));
1102 "no channel context assigned to vif?, disconnecting\n");
1103 ieee80211_queue_work(&local->hw,
1104 &ifmgd->csa_connection_drop_work);
1105 mutex_unlock(&local->chanctx_mtx);
1106 mutex_unlock(&local->mtx);
1110 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1112 if (local->use_chanctx) {
1113 u32 num_chanctx = 0;
1114 list_for_each_entry(chanctx, &local->chanctx_list, list)
1117 if (num_chanctx > 1 ||
1118 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1120 "not handling chan-switch with channel contexts\n");
1121 ieee80211_queue_work(&local->hw,
1122 &ifmgd->csa_connection_drop_work);
1123 mutex_unlock(&local->chanctx_mtx);
1124 mutex_unlock(&local->mtx);
1129 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1130 chanctx->mode, false);
1133 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1135 ieee80211_queue_work(&local->hw,
1136 &ifmgd->csa_connection_drop_work);
1137 mutex_unlock(&local->chanctx_mtx);
1138 mutex_unlock(&local->mtx);
1141 mutex_unlock(&local->chanctx_mtx);
1143 sdata->vif.csa_active = true;
1144 sdata->csa_chandef = csa_ie.chandef;
1145 sdata->csa_block_tx = csa_ie.mode;
1147 if (sdata->csa_block_tx)
1148 ieee80211_stop_vif_queues(local, sdata,
1149 IEEE80211_QUEUE_STOP_REASON_CSA);
1150 mutex_unlock(&local->mtx);
1152 if (local->ops->channel_switch) {
1153 /* use driver's channel switch callback */
1154 struct ieee80211_channel_switch ch_switch = {
1155 .timestamp = timestamp,
1156 .block_tx = csa_ie.mode,
1157 .chandef = csa_ie.chandef,
1158 .count = csa_ie.count,
1161 drv_channel_switch(local, &ch_switch);
1165 /* channel switch handled in software */
1166 if (csa_ie.count <= 1)
1167 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1169 mod_timer(&ifmgd->chswitch_timer,
1170 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
1173 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1174 struct ieee80211_channel *channel,
1175 const u8 *country_ie, u8 country_ie_len,
1176 const u8 *pwr_constr_elem)
1178 struct ieee80211_country_ie_triplet *triplet;
1179 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1180 int i, chan_pwr, chan_increment, new_ap_level;
1181 bool have_chan_pwr = false;
1184 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1187 triplet = (void *)(country_ie + 3);
1188 country_ie_len -= 3;
1190 switch (channel->band) {
1194 case IEEE80211_BAND_2GHZ:
1195 case IEEE80211_BAND_60GHZ:
1198 case IEEE80211_BAND_5GHZ:
1204 while (country_ie_len >= 3) {
1205 u8 first_channel = triplet->chans.first_channel;
1207 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1210 for (i = 0; i < triplet->chans.num_channels; i++) {
1211 if (first_channel + i * chan_increment == chan) {
1212 have_chan_pwr = true;
1213 chan_pwr = triplet->chans.max_power;
1222 country_ie_len -= 3;
1228 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1230 if (sdata->ap_power_level == new_ap_level)
1234 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1235 new_ap_level, chan_pwr, *pwr_constr_elem,
1236 sdata->u.mgd.bssid);
1237 sdata->ap_power_level = new_ap_level;
1238 if (__ieee80211_recalc_txpower(sdata))
1239 return BSS_CHANGED_TXPOWER;
1244 static void ieee80211_enable_ps(struct ieee80211_local *local,
1245 struct ieee80211_sub_if_data *sdata)
1247 struct ieee80211_conf *conf = &local->hw.conf;
1250 * If we are scanning right now then the parameters will
1251 * take effect when scan finishes.
1253 if (local->scanning)
1256 if (conf->dynamic_ps_timeout > 0 &&
1257 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1258 mod_timer(&local->dynamic_ps_timer, jiffies +
1259 msecs_to_jiffies(conf->dynamic_ps_timeout));
1261 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1262 ieee80211_send_nullfunc(local, sdata, 1);
1264 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1265 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1268 conf->flags |= IEEE80211_CONF_PS;
1269 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1273 static void ieee80211_change_ps(struct ieee80211_local *local)
1275 struct ieee80211_conf *conf = &local->hw.conf;
1277 if (local->ps_sdata) {
1278 ieee80211_enable_ps(local, local->ps_sdata);
1279 } else if (conf->flags & IEEE80211_CONF_PS) {
1280 conf->flags &= ~IEEE80211_CONF_PS;
1281 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1282 del_timer_sync(&local->dynamic_ps_timer);
1283 cancel_work_sync(&local->dynamic_ps_enable_work);
1287 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1289 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1290 struct sta_info *sta = NULL;
1291 bool authorized = false;
1293 if (!mgd->powersave)
1299 if (!mgd->associated)
1302 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1305 if (!mgd->have_beacon)
1309 sta = sta_info_get(sdata, mgd->bssid);
1311 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1317 /* need to hold RTNL or interface lock */
1318 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1320 struct ieee80211_sub_if_data *sdata, *found = NULL;
1324 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1325 local->ps_sdata = NULL;
1329 list_for_each_entry(sdata, &local->interfaces, list) {
1330 if (!ieee80211_sdata_running(sdata))
1332 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1333 /* If an AP vif is found, then disable PS
1334 * by setting the count to zero thereby setting
1340 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1346 if (count == 1 && ieee80211_powersave_allowed(found)) {
1350 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1352 beaconint_us = ieee80211_tu_to_usec(
1353 found->vif.bss_conf.beacon_int);
1355 timeout = local->dynamic_ps_forced_timeout;
1358 * Go to full PSM if the user configures a very low
1359 * latency requirement.
1360 * The 2000 second value is there for compatibility
1361 * until the PM_QOS_NETWORK_LATENCY is configured
1364 if (latency > (1900 * USEC_PER_MSEC) &&
1365 latency != (2000 * USEC_PER_SEC))
1370 local->hw.conf.dynamic_ps_timeout = timeout;
1372 if (beaconint_us > latency) {
1373 local->ps_sdata = NULL;
1376 u8 dtimper = found->u.mgd.dtim_period;
1378 /* If the TIM IE is invalid, pretend the value is 1 */
1381 else if (dtimper > 1)
1382 maxslp = min_t(int, dtimper,
1383 latency / beaconint_us);
1385 local->hw.conf.max_sleep_period = maxslp;
1386 local->hw.conf.ps_dtim_period = dtimper;
1387 local->ps_sdata = found;
1390 local->ps_sdata = NULL;
1393 ieee80211_change_ps(local);
1396 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1398 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1400 if (sdata->vif.bss_conf.ps != ps_allowed) {
1401 sdata->vif.bss_conf.ps = ps_allowed;
1402 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1406 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1408 struct ieee80211_local *local =
1409 container_of(work, struct ieee80211_local,
1410 dynamic_ps_disable_work);
1412 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1413 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1414 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1417 ieee80211_wake_queues_by_reason(&local->hw,
1418 IEEE80211_MAX_QUEUE_MAP,
1419 IEEE80211_QUEUE_STOP_REASON_PS,
1423 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1425 struct ieee80211_local *local =
1426 container_of(work, struct ieee80211_local,
1427 dynamic_ps_enable_work);
1428 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1429 struct ieee80211_if_managed *ifmgd;
1430 unsigned long flags;
1433 /* can only happen when PS was just disabled anyway */
1437 ifmgd = &sdata->u.mgd;
1439 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1442 if (local->hw.conf.dynamic_ps_timeout > 0) {
1443 /* don't enter PS if TX frames are pending */
1444 if (drv_tx_frames_pending(local)) {
1445 mod_timer(&local->dynamic_ps_timer, jiffies +
1447 local->hw.conf.dynamic_ps_timeout));
1452 * transmission can be stopped by others which leads to
1453 * dynamic_ps_timer expiry. Postpone the ps timer if it
1454 * is not the actual idle state.
1456 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1457 for (q = 0; q < local->hw.queues; q++) {
1458 if (local->queue_stop_reasons[q]) {
1459 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1461 mod_timer(&local->dynamic_ps_timer, jiffies +
1463 local->hw.conf.dynamic_ps_timeout));
1467 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1470 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1471 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1472 if (drv_tx_frames_pending(local)) {
1473 mod_timer(&local->dynamic_ps_timer, jiffies +
1475 local->hw.conf.dynamic_ps_timeout));
1477 ieee80211_send_nullfunc(local, sdata, 1);
1478 /* Flush to get the tx status of nullfunc frame */
1479 ieee80211_flush_queues(local, sdata);
1483 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1484 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1485 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1486 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1487 local->hw.conf.flags |= IEEE80211_CONF_PS;
1488 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1492 void ieee80211_dynamic_ps_timer(unsigned long data)
1494 struct ieee80211_local *local = (void *) data;
1496 if (local->quiescing || local->suspended)
1499 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1502 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1504 struct delayed_work *delayed_work =
1505 container_of(work, struct delayed_work, work);
1506 struct ieee80211_sub_if_data *sdata =
1507 container_of(delayed_work, struct ieee80211_sub_if_data,
1508 dfs_cac_timer_work);
1509 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1511 mutex_lock(&sdata->local->mtx);
1512 if (sdata->wdev.cac_started) {
1513 ieee80211_vif_release_channel(sdata);
1514 cfg80211_cac_event(sdata->dev, &chandef,
1515 NL80211_RADAR_CAC_FINISHED,
1518 mutex_unlock(&sdata->local->mtx);
1522 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1523 struct ieee80211_sub_if_data *sdata,
1524 const u8 *wmm_param, size_t wmm_param_len)
1526 struct ieee80211_tx_queue_params params;
1527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1531 u8 uapsd_queues = 0;
1533 if (!local->ops->conf_tx)
1536 if (local->hw.queues < IEEE80211_NUM_ACS)
1542 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1545 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1546 uapsd_queues = ifmgd->uapsd_queues;
1548 count = wmm_param[6] & 0x0f;
1549 if (count == ifmgd->wmm_last_param_set)
1551 ifmgd->wmm_last_param_set = count;
1553 pos = wmm_param + 8;
1554 left = wmm_param_len - 8;
1556 memset(¶ms, 0, sizeof(params));
1559 for (; left >= 4; left -= 4, pos += 4) {
1560 int aci = (pos[0] >> 5) & 0x03;
1561 int acm = (pos[0] >> 4) & 0x01;
1569 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1570 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1576 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1577 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1583 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1584 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1591 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1592 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1597 params.aifs = pos[0] & 0x0f;
1598 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1599 params.cw_min = ecw2cw(pos[1] & 0x0f);
1600 params.txop = get_unaligned_le16(pos + 2);
1602 params.uapsd = uapsd;
1605 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1607 params.aifs, params.cw_min, params.cw_max,
1608 params.txop, params.uapsd);
1609 sdata->tx_conf[queue] = params;
1610 if (drv_conf_tx(local, sdata, queue, ¶ms))
1612 "failed to set TX queue parameters for queue %d\n",
1616 /* enable WMM or activate new settings */
1617 sdata->vif.bss_conf.qos = true;
1621 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1623 lockdep_assert_held(&sdata->local->mtx);
1625 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1626 ieee80211_run_deferred_scan(sdata->local);
1629 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1631 mutex_lock(&sdata->local->mtx);
1632 __ieee80211_stop_poll(sdata);
1633 mutex_unlock(&sdata->local->mtx);
1636 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1637 u16 capab, bool erp_valid, u8 erp)
1639 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1641 bool use_protection;
1642 bool use_short_preamble;
1643 bool use_short_slot;
1646 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1647 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1649 use_protection = false;
1650 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1653 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1654 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1655 use_short_slot = true;
1657 if (use_protection != bss_conf->use_cts_prot) {
1658 bss_conf->use_cts_prot = use_protection;
1659 changed |= BSS_CHANGED_ERP_CTS_PROT;
1662 if (use_short_preamble != bss_conf->use_short_preamble) {
1663 bss_conf->use_short_preamble = use_short_preamble;
1664 changed |= BSS_CHANGED_ERP_PREAMBLE;
1667 if (use_short_slot != bss_conf->use_short_slot) {
1668 bss_conf->use_short_slot = use_short_slot;
1669 changed |= BSS_CHANGED_ERP_SLOT;
1675 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1676 struct cfg80211_bss *cbss,
1677 u32 bss_info_changed)
1679 struct ieee80211_bss *bss = (void *)cbss->priv;
1680 struct ieee80211_local *local = sdata->local;
1681 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1683 bss_info_changed |= BSS_CHANGED_ASSOC;
1684 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1685 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1687 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1688 beacon_loss_count * bss_conf->beacon_int));
1690 sdata->u.mgd.associated = cbss;
1691 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1693 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1695 if (sdata->vif.p2p) {
1696 const struct cfg80211_bss_ies *ies;
1699 ies = rcu_dereference(cbss->ies);
1703 ret = cfg80211_get_p2p_attr(
1704 ies->data, ies->len,
1705 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1706 (u8 *) &bss_conf->p2p_noa_attr,
1707 sizeof(bss_conf->p2p_noa_attr));
1709 sdata->u.mgd.p2p_noa_index =
1710 bss_conf->p2p_noa_attr.index;
1711 bss_info_changed |= BSS_CHANGED_P2P_PS;
1717 /* just to be sure */
1718 ieee80211_stop_poll(sdata);
1720 ieee80211_led_assoc(local, 1);
1722 if (sdata->u.mgd.have_beacon) {
1724 * If the AP is buggy we may get here with no DTIM period
1725 * known, so assume it's 1 which is the only safe assumption
1726 * in that case, although if the TIM IE is broken powersave
1727 * probably just won't work at all.
1729 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1730 bss_conf->beacon_rate = bss->beacon_rate;
1731 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1733 bss_conf->beacon_rate = NULL;
1734 bss_conf->dtim_period = 0;
1737 bss_conf->assoc = 1;
1739 /* Tell the driver to monitor connection quality (if supported) */
1740 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1741 bss_conf->cqm_rssi_thold)
1742 bss_info_changed |= BSS_CHANGED_CQM;
1744 /* Enable ARP filtering */
1745 if (bss_conf->arp_addr_cnt)
1746 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1748 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1750 mutex_lock(&local->iflist_mtx);
1751 ieee80211_recalc_ps(local, -1);
1752 mutex_unlock(&local->iflist_mtx);
1754 ieee80211_recalc_smps(sdata);
1755 ieee80211_recalc_ps_vif(sdata);
1757 netif_carrier_on(sdata->dev);
1760 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1761 u16 stype, u16 reason, bool tx,
1764 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1765 struct ieee80211_local *local = sdata->local;
1768 sdata_assert_lock(sdata);
1770 if (WARN_ON_ONCE(tx && !frame_buf))
1773 if (WARN_ON(!ifmgd->associated))
1776 ieee80211_stop_poll(sdata);
1778 ifmgd->associated = NULL;
1779 netif_carrier_off(sdata->dev);
1782 * if we want to get out of ps before disassoc (why?) we have
1783 * to do it before sending disassoc, as otherwise the null-packet
1786 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1787 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1788 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1790 local->ps_sdata = NULL;
1792 /* disable per-vif ps */
1793 ieee80211_recalc_ps_vif(sdata);
1795 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1797 ieee80211_flush_queues(local, sdata);
1799 /* deauthenticate/disassociate now */
1800 if (tx || frame_buf)
1801 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1802 reason, tx, frame_buf);
1804 /* flush out frame */
1806 ieee80211_flush_queues(local, sdata);
1808 /* clear bssid only after building the needed mgmt frames */
1809 memset(ifmgd->bssid, 0, ETH_ALEN);
1811 /* remove AP and TDLS peers */
1812 sta_info_flush(sdata);
1814 /* finally reset all BSS / config parameters */
1815 changed |= ieee80211_reset_erp_info(sdata);
1817 ieee80211_led_assoc(local, 0);
1818 changed |= BSS_CHANGED_ASSOC;
1819 sdata->vif.bss_conf.assoc = false;
1821 ifmgd->p2p_noa_index = -1;
1822 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1823 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1825 /* on the next assoc, re-program HT/VHT parameters */
1826 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1827 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1828 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1829 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1831 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1833 del_timer_sync(&local->dynamic_ps_timer);
1834 cancel_work_sync(&local->dynamic_ps_enable_work);
1836 /* Disable ARP filtering */
1837 if (sdata->vif.bss_conf.arp_addr_cnt)
1838 changed |= BSS_CHANGED_ARP_FILTER;
1840 sdata->vif.bss_conf.qos = false;
1841 changed |= BSS_CHANGED_QOS;
1843 /* The BSSID (not really interesting) and HT changed */
1844 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1845 ieee80211_bss_info_change_notify(sdata, changed);
1847 /* disassociated - set to defaults now */
1848 ieee80211_set_wmm_default(sdata, false);
1850 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1851 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1852 del_timer_sync(&sdata->u.mgd.timer);
1853 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1855 sdata->vif.bss_conf.dtim_period = 0;
1856 sdata->vif.bss_conf.beacon_rate = NULL;
1858 ifmgd->have_beacon = false;
1861 mutex_lock(&local->mtx);
1862 ieee80211_vif_release_channel(sdata);
1864 sdata->vif.csa_active = false;
1865 if (sdata->csa_block_tx) {
1866 ieee80211_wake_vif_queues(local, sdata,
1867 IEEE80211_QUEUE_STOP_REASON_CSA);
1868 sdata->csa_block_tx = false;
1870 mutex_unlock(&local->mtx);
1872 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1875 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1876 struct ieee80211_hdr *hdr)
1879 * We can postpone the mgd.timer whenever receiving unicast frames
1880 * from AP because we know that the connection is working both ways
1881 * at that time. But multicast frames (and hence also beacons) must
1882 * be ignored here, because we need to trigger the timer during
1883 * data idle periods for sending the periodic probe request to the
1884 * AP we're connected to.
1886 if (is_multicast_ether_addr(hdr->addr1))
1889 ieee80211_sta_reset_conn_monitor(sdata);
1892 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1894 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1895 struct ieee80211_local *local = sdata->local;
1897 mutex_lock(&local->mtx);
1898 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1901 __ieee80211_stop_poll(sdata);
1903 mutex_lock(&local->iflist_mtx);
1904 ieee80211_recalc_ps(local, -1);
1905 mutex_unlock(&local->iflist_mtx);
1907 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1911 * We've received a probe response, but are not sure whether
1912 * we have or will be receiving any beacons or data, so let's
1913 * schedule the timers again, just in case.
1915 ieee80211_sta_reset_beacon_monitor(sdata);
1917 mod_timer(&ifmgd->conn_mon_timer,
1918 round_jiffies_up(jiffies +
1919 IEEE80211_CONNECTION_IDLE_TIME));
1921 mutex_unlock(&local->mtx);
1924 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1925 struct ieee80211_hdr *hdr, bool ack)
1927 if (!ieee80211_is_data(hdr->frame_control))
1930 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1931 sdata->u.mgd.probe_send_count > 0) {
1933 ieee80211_sta_reset_conn_monitor(sdata);
1935 sdata->u.mgd.nullfunc_failed = true;
1936 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1941 ieee80211_sta_reset_conn_monitor(sdata);
1944 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1948 u8 *dst = ifmgd->associated->bssid;
1949 u8 unicast_limit = max(1, max_probe_tries - 3);
1952 * Try sending broadcast probe requests for the last three
1953 * probe requests after the first ones failed since some
1954 * buggy APs only support broadcast probe requests.
1956 if (ifmgd->probe_send_count >= unicast_limit)
1960 * When the hardware reports an accurate Tx ACK status, it's
1961 * better to send a nullfunc frame instead of a probe request,
1962 * as it will kick us off the AP quickly if we aren't associated
1963 * anymore. The timeout will be reset if the frame is ACKed by
1966 ifmgd->probe_send_count++;
1968 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1969 ifmgd->nullfunc_failed = false;
1970 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1975 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1976 if (WARN_ON_ONCE(ssid == NULL))
1981 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1982 0, (u32) -1, true, 0,
1983 ifmgd->associated->channel, false);
1987 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1988 run_again(sdata, ifmgd->probe_timeout);
1989 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1990 ieee80211_flush_queues(sdata->local, sdata);
1993 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1996 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1997 bool already = false;
1999 if (!ieee80211_sdata_running(sdata))
2004 if (!ifmgd->associated)
2007 mutex_lock(&sdata->local->mtx);
2009 if (sdata->local->tmp_channel || sdata->local->scanning) {
2010 mutex_unlock(&sdata->local->mtx);
2015 mlme_dbg_ratelimited(sdata,
2016 "detected beacon loss from AP (missed %d beacons) - probing\n",
2019 ieee80211_cqm_rssi_notify(&sdata->vif,
2020 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2025 * The driver/our work has already reported this event or the
2026 * connection monitoring has kicked in and we have already sent
2027 * a probe request. Or maybe the AP died and the driver keeps
2028 * reporting until we disassociate...
2030 * In either case we have to ignore the current call to this
2031 * function (except for setting the correct probe reason bit)
2032 * because otherwise we would reset the timer every time and
2033 * never check whether we received a probe response!
2035 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2038 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2040 mutex_unlock(&sdata->local->mtx);
2045 mutex_lock(&sdata->local->iflist_mtx);
2046 ieee80211_recalc_ps(sdata->local, -1);
2047 mutex_unlock(&sdata->local->iflist_mtx);
2049 ifmgd->probe_send_count = 0;
2050 ieee80211_mgd_probe_ap_send(sdata);
2052 sdata_unlock(sdata);
2055 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2056 struct ieee80211_vif *vif)
2058 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2060 struct cfg80211_bss *cbss;
2061 struct sk_buff *skb;
2065 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2068 sdata_assert_lock(sdata);
2070 if (ifmgd->associated)
2071 cbss = ifmgd->associated;
2072 else if (ifmgd->auth_data)
2073 cbss = ifmgd->auth_data->bss;
2074 else if (ifmgd->assoc_data)
2075 cbss = ifmgd->assoc_data->bss;
2080 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2081 if (WARN_ON_ONCE(ssid == NULL))
2086 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2087 (u32) -1, cbss->channel,
2094 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2096 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2098 struct ieee80211_local *local = sdata->local;
2099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2100 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2103 if (!ifmgd->associated) {
2104 sdata_unlock(sdata);
2108 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2109 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2111 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2113 mutex_lock(&local->mtx);
2114 sdata->vif.csa_active = false;
2115 if (sdata->csa_block_tx) {
2116 ieee80211_wake_vif_queues(local, sdata,
2117 IEEE80211_QUEUE_STOP_REASON_CSA);
2118 sdata->csa_block_tx = false;
2120 mutex_unlock(&local->mtx);
2122 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2123 IEEE80211_DEAUTH_FRAME_LEN);
2124 sdata_unlock(sdata);
2127 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2129 struct ieee80211_sub_if_data *sdata =
2130 container_of(work, struct ieee80211_sub_if_data,
2131 u.mgd.beacon_connection_loss_work);
2132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2133 struct sta_info *sta;
2135 if (ifmgd->associated) {
2137 sta = sta_info_get(sdata, ifmgd->bssid);
2139 sta->beacon_loss_count++;
2143 if (ifmgd->connection_loss) {
2144 sdata_info(sdata, "Connection to AP %pM lost\n",
2146 __ieee80211_disconnect(sdata);
2148 ieee80211_mgd_probe_ap(sdata, true);
2152 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2154 struct ieee80211_sub_if_data *sdata =
2155 container_of(work, struct ieee80211_sub_if_data,
2156 u.mgd.csa_connection_drop_work);
2158 __ieee80211_disconnect(sdata);
2161 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2163 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2164 struct ieee80211_hw *hw = &sdata->local->hw;
2166 trace_api_beacon_loss(sdata);
2168 sdata->u.mgd.connection_loss = false;
2169 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2171 EXPORT_SYMBOL(ieee80211_beacon_loss);
2173 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2175 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2176 struct ieee80211_hw *hw = &sdata->local->hw;
2178 trace_api_connection_loss(sdata);
2180 sdata->u.mgd.connection_loss = true;
2181 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2183 EXPORT_SYMBOL(ieee80211_connection_loss);
2186 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2189 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2191 sdata_assert_lock(sdata);
2194 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2196 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2197 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2198 sdata->u.mgd.flags = 0;
2199 mutex_lock(&sdata->local->mtx);
2200 ieee80211_vif_release_channel(sdata);
2201 mutex_unlock(&sdata->local->mtx);
2204 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2206 sdata->u.mgd.auth_data = NULL;
2209 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2210 struct ieee80211_mgmt *mgmt, size_t len)
2212 struct ieee80211_local *local = sdata->local;
2213 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2215 struct ieee802_11_elems elems;
2218 pos = mgmt->u.auth.variable;
2219 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2220 if (!elems.challenge)
2222 auth_data->expected_transaction = 4;
2223 drv_mgd_prepare_tx(sdata->local, sdata);
2224 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2225 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2226 IEEE80211_TX_INTFL_MLME_CONN_TX;
2227 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2228 elems.challenge - 2, elems.challenge_len + 2,
2229 auth_data->bss->bssid, auth_data->bss->bssid,
2230 auth_data->key, auth_data->key_len,
2231 auth_data->key_idx, tx_flags);
2234 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2235 struct ieee80211_mgmt *mgmt, size_t len)
2237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2239 u16 auth_alg, auth_transaction, status_code;
2240 struct sta_info *sta;
2242 sdata_assert_lock(sdata);
2247 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2250 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2252 if (!ether_addr_equal(bssid, mgmt->bssid))
2255 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2256 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2257 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2259 if (auth_alg != ifmgd->auth_data->algorithm ||
2260 auth_transaction != ifmgd->auth_data->expected_transaction) {
2261 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2262 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2264 ifmgd->auth_data->expected_transaction);
2268 if (status_code != WLAN_STATUS_SUCCESS) {
2269 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2270 mgmt->sa, status_code);
2271 ieee80211_destroy_auth_data(sdata, false);
2272 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2276 switch (ifmgd->auth_data->algorithm) {
2277 case WLAN_AUTH_OPEN:
2278 case WLAN_AUTH_LEAP:
2282 case WLAN_AUTH_SHARED_KEY:
2283 if (ifmgd->auth_data->expected_transaction != 4) {
2284 ieee80211_auth_challenge(sdata, mgmt, len);
2285 /* need another frame */
2290 WARN_ONCE(1, "invalid auth alg %d",
2291 ifmgd->auth_data->algorithm);
2295 sdata_info(sdata, "authenticated\n");
2296 ifmgd->auth_data->done = true;
2297 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2298 ifmgd->auth_data->timeout_started = true;
2299 run_again(sdata, ifmgd->auth_data->timeout);
2301 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2302 ifmgd->auth_data->expected_transaction != 2) {
2304 * Report auth frame to user space for processing since another
2305 * round of Authentication frames is still needed.
2307 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2311 /* move station state to auth */
2312 mutex_lock(&sdata->local->sta_mtx);
2313 sta = sta_info_get(sdata, bssid);
2315 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2318 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2319 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2322 mutex_unlock(&sdata->local->sta_mtx);
2324 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2327 mutex_unlock(&sdata->local->sta_mtx);
2328 /* ignore frame -- wait for timeout */
2331 #define case_WLAN(type) \
2332 case WLAN_REASON_##type: return #type
2334 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2336 switch (reason_code) {
2337 case_WLAN(UNSPECIFIED);
2338 case_WLAN(PREV_AUTH_NOT_VALID);
2339 case_WLAN(DEAUTH_LEAVING);
2340 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2341 case_WLAN(DISASSOC_AP_BUSY);
2342 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2343 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2344 case_WLAN(DISASSOC_STA_HAS_LEFT);
2345 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2346 case_WLAN(DISASSOC_BAD_POWER);
2347 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2348 case_WLAN(INVALID_IE);
2349 case_WLAN(MIC_FAILURE);
2350 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2351 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2352 case_WLAN(IE_DIFFERENT);
2353 case_WLAN(INVALID_GROUP_CIPHER);
2354 case_WLAN(INVALID_PAIRWISE_CIPHER);
2355 case_WLAN(INVALID_AKMP);
2356 case_WLAN(UNSUPP_RSN_VERSION);
2357 case_WLAN(INVALID_RSN_IE_CAP);
2358 case_WLAN(IEEE8021X_FAILED);
2359 case_WLAN(CIPHER_SUITE_REJECTED);
2360 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2361 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2362 case_WLAN(DISASSOC_LOW_ACK);
2363 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2364 case_WLAN(QSTA_LEAVE_QBSS);
2365 case_WLAN(QSTA_NOT_USE);
2366 case_WLAN(QSTA_REQUIRE_SETUP);
2367 case_WLAN(QSTA_TIMEOUT);
2368 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2369 case_WLAN(MESH_PEER_CANCELED);
2370 case_WLAN(MESH_MAX_PEERS);
2371 case_WLAN(MESH_CONFIG);
2372 case_WLAN(MESH_CLOSE);
2373 case_WLAN(MESH_MAX_RETRIES);
2374 case_WLAN(MESH_CONFIRM_TIMEOUT);
2375 case_WLAN(MESH_INVALID_GTK);
2376 case_WLAN(MESH_INCONSISTENT_PARAM);
2377 case_WLAN(MESH_INVALID_SECURITY);
2378 case_WLAN(MESH_PATH_ERROR);
2379 case_WLAN(MESH_PATH_NOFORWARD);
2380 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2381 case_WLAN(MAC_EXISTS_IN_MBSS);
2382 case_WLAN(MESH_CHAN_REGULATORY);
2383 case_WLAN(MESH_CHAN);
2384 default: return "<unknown>";
2388 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2389 struct ieee80211_mgmt *mgmt, size_t len)
2391 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2392 const u8 *bssid = NULL;
2395 sdata_assert_lock(sdata);
2400 if (!ifmgd->associated ||
2401 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2404 bssid = ifmgd->associated->bssid;
2406 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2408 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2409 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2411 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2413 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2417 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2418 struct ieee80211_mgmt *mgmt, size_t len)
2420 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2423 sdata_assert_lock(sdata);
2428 if (!ifmgd->associated ||
2429 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2432 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2434 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2435 mgmt->sa, reason_code);
2437 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2439 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2442 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2443 u8 *supp_rates, unsigned int supp_rates_len,
2444 u32 *rates, u32 *basic_rates,
2445 bool *have_higher_than_11mbit,
2446 int *min_rate, int *min_rate_index,
2447 int shift, u32 rate_flags)
2451 for (i = 0; i < supp_rates_len; i++) {
2452 int rate = supp_rates[i] & 0x7f;
2453 bool is_basic = !!(supp_rates[i] & 0x80);
2455 if ((rate * 5 * (1 << shift)) > 110)
2456 *have_higher_than_11mbit = true;
2459 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2460 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2462 * Note: Even through the membership selector and the basic
2463 * rate flag share the same bit, they are not exactly
2466 if (!!(supp_rates[i] & 0x80) &&
2467 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2470 for (j = 0; j < sband->n_bitrates; j++) {
2471 struct ieee80211_rate *br;
2474 br = &sband->bitrates[j];
2475 if ((rate_flags & br->flags) != rate_flags)
2478 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2479 if (brate == rate) {
2482 *basic_rates |= BIT(j);
2483 if ((rate * 5) < *min_rate) {
2484 *min_rate = rate * 5;
2485 *min_rate_index = j;
2493 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2496 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2498 sdata_assert_lock(sdata);
2501 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2503 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2504 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2505 sdata->u.mgd.flags = 0;
2506 mutex_lock(&sdata->local->mtx);
2507 ieee80211_vif_release_channel(sdata);
2508 mutex_unlock(&sdata->local->mtx);
2512 sdata->u.mgd.assoc_data = NULL;
2515 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2516 struct cfg80211_bss *cbss,
2517 struct ieee80211_mgmt *mgmt, size_t len)
2519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2520 struct ieee80211_local *local = sdata->local;
2521 struct ieee80211_supported_band *sband;
2522 struct sta_info *sta;
2524 u16 capab_info, aid;
2525 struct ieee802_11_elems elems;
2526 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2527 const struct cfg80211_bss_ies *bss_ies = NULL;
2528 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2533 /* AssocResp and ReassocResp have identical structure */
2535 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2536 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2538 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2539 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2541 aid &= ~(BIT(15) | BIT(14));
2543 ifmgd->broken_ap = false;
2545 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2546 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2549 ifmgd->broken_ap = true;
2552 pos = mgmt->u.assoc_resp.variable;
2553 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2555 if (!elems.supp_rates) {
2556 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2563 * Some APs are erroneously not including some information in their
2564 * (re)association response frames. Try to recover by using the data
2565 * from the beacon or probe response. This seems to afflict mobile
2566 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2567 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2569 if ((assoc_data->wmm && !elems.wmm_param) ||
2570 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2571 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2572 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2573 (!elems.vht_cap_elem || !elems.vht_operation))) {
2574 const struct cfg80211_bss_ies *ies;
2575 struct ieee802_11_elems bss_elems;
2578 ies = rcu_dereference(cbss->ies);
2580 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2586 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2588 if (assoc_data->wmm &&
2589 !elems.wmm_param && bss_elems.wmm_param) {
2590 elems.wmm_param = bss_elems.wmm_param;
2592 "AP bug: WMM param missing from AssocResp\n");
2596 * Also check if we requested HT/VHT, otherwise the AP doesn't
2597 * have to include the IEs in the (re)association response.
2599 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2600 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2601 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2603 "AP bug: HT capability missing from AssocResp\n");
2605 if (!elems.ht_operation && bss_elems.ht_operation &&
2606 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2607 elems.ht_operation = bss_elems.ht_operation;
2609 "AP bug: HT operation missing from AssocResp\n");
2611 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2612 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2613 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2615 "AP bug: VHT capa missing from AssocResp\n");
2617 if (!elems.vht_operation && bss_elems.vht_operation &&
2618 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2619 elems.vht_operation = bss_elems.vht_operation;
2621 "AP bug: VHT operation missing from AssocResp\n");
2626 * We previously checked these in the beacon/probe response, so
2627 * they should be present here. This is just a safety net.
2629 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2630 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2632 "HT AP is missing WMM params or HT capability/operation\n");
2637 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2638 (!elems.vht_cap_elem || !elems.vht_operation)) {
2640 "VHT AP is missing VHT capability/operation\n");
2645 mutex_lock(&sdata->local->sta_mtx);
2647 * station info was already allocated and inserted before
2648 * the association and should be available to us
2650 sta = sta_info_get(sdata, cbss->bssid);
2651 if (WARN_ON(!sta)) {
2652 mutex_unlock(&sdata->local->sta_mtx);
2657 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2659 /* Set up internal HT/VHT capabilities */
2660 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2661 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2662 elems.ht_cap_elem, sta);
2664 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2665 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2666 elems.vht_cap_elem, sta);
2669 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2670 * in their association response, so ignore that data for our own
2671 * configuration. If it changed since the last beacon, we'll get the
2672 * next beacon and update then.
2676 * If an operating mode notification IE is present, override the
2677 * NSS calculation (that would be done in rate_control_rate_init())
2678 * and use the # of streams from that element.
2680 if (elems.opmode_notif &&
2681 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2684 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2685 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2687 sta->sta.rx_nss = nss;
2690 rate_control_rate_init(sta);
2692 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2693 set_sta_flag(sta, WLAN_STA_MFP);
2695 if (elems.wmm_param)
2696 set_sta_flag(sta, WLAN_STA_WME);
2698 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2699 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2700 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2703 "failed to move station %pM to desired state\n",
2705 WARN_ON(__sta_info_destroy(sta));
2706 mutex_unlock(&sdata->local->sta_mtx);
2711 mutex_unlock(&sdata->local->sta_mtx);
2714 * Always handle WMM once after association regardless
2715 * of the first value the AP uses. Setting -1 here has
2716 * that effect because the AP values is an unsigned
2719 ifmgd->wmm_last_param_set = -1;
2721 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2722 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2723 elems.wmm_param_len);
2725 ieee80211_set_wmm_default(sdata, false);
2726 changed |= BSS_CHANGED_QOS;
2728 /* set AID and assoc capability,
2729 * ieee80211_set_associated() will tell the driver */
2730 bss_conf->aid = aid;
2731 bss_conf->assoc_capability = capab_info;
2732 ieee80211_set_associated(sdata, cbss, changed);
2735 * If we're using 4-addr mode, let the AP know that we're
2736 * doing so, so that it can create the STA VLAN on its side
2738 if (ifmgd->use_4addr)
2739 ieee80211_send_4addr_nullfunc(local, sdata);
2742 * Start timer to probe the connection to the AP now.
2743 * Also start the timer that will detect beacon loss.
2745 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2746 ieee80211_sta_reset_beacon_monitor(sdata);
2754 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2755 struct ieee80211_mgmt *mgmt,
2758 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2759 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2760 u16 capab_info, status_code, aid;
2761 struct ieee802_11_elems elems;
2764 struct cfg80211_bss *bss;
2766 sdata_assert_lock(sdata);
2770 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2774 * AssocResp and ReassocResp have identical structure, so process both
2775 * of them in this function.
2781 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2782 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2783 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2784 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2787 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2788 reassoc ? "Rea" : "A", mgmt->sa,
2789 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2791 pos = mgmt->u.assoc_resp.variable;
2792 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2794 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2795 elems.timeout_int &&
2796 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2798 tu = le32_to_cpu(elems.timeout_int->value);
2799 ms = tu * 1024 / 1000;
2801 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2803 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2804 assoc_data->timeout_started = true;
2805 if (ms > IEEE80211_ASSOC_TIMEOUT)
2806 run_again(sdata, assoc_data->timeout);
2810 bss = assoc_data->bss;
2812 if (status_code != WLAN_STATUS_SUCCESS) {
2813 sdata_info(sdata, "%pM denied association (code=%d)\n",
2814 mgmt->sa, status_code);
2815 ieee80211_destroy_assoc_data(sdata, false);
2817 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2818 /* oops -- internal error -- send timeout for now */
2819 ieee80211_destroy_assoc_data(sdata, false);
2820 cfg80211_assoc_timeout(sdata->dev, bss);
2823 sdata_info(sdata, "associated\n");
2826 * destroy assoc_data afterwards, as otherwise an idle
2827 * recalc after assoc_data is NULL but before associated
2828 * is set can cause the interface to go idle
2830 ieee80211_destroy_assoc_data(sdata, true);
2833 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2836 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2837 struct ieee80211_mgmt *mgmt, size_t len,
2838 struct ieee80211_rx_status *rx_status,
2839 struct ieee802_11_elems *elems)
2841 struct ieee80211_local *local = sdata->local;
2842 struct ieee80211_bss *bss;
2843 struct ieee80211_channel *channel;
2845 sdata_assert_lock(sdata);
2847 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2851 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2854 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2855 ieee80211_rx_bss_put(local, bss);
2860 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2861 struct sk_buff *skb)
2863 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2864 struct ieee80211_if_managed *ifmgd;
2865 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2866 size_t baselen, len = skb->len;
2867 struct ieee802_11_elems elems;
2869 ifmgd = &sdata->u.mgd;
2871 sdata_assert_lock(sdata);
2873 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2874 return; /* ignore ProbeResp to foreign address */
2876 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2880 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2883 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2885 if (ifmgd->associated &&
2886 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2887 ieee80211_reset_ap_probe(sdata);
2889 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2890 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2891 /* got probe response, continue with auth */
2892 sdata_info(sdata, "direct probe responded\n");
2893 ifmgd->auth_data->tries = 0;
2894 ifmgd->auth_data->timeout = jiffies;
2895 ifmgd->auth_data->timeout_started = true;
2896 run_again(sdata, ifmgd->auth_data->timeout);
2901 * This is the canonical list of information elements we care about,
2902 * the filter code also gives us all changes to the Microsoft OUI
2903 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2905 * We implement beacon filtering in software since that means we can
2906 * avoid processing the frame here and in cfg80211, and userspace
2907 * will not be able to tell whether the hardware supports it or not.
2909 * XXX: This list needs to be dynamic -- userspace needs to be able to
2910 * add items it requires. It also needs to be able to tell us to
2911 * look out for other vendor IEs.
2913 static const u64 care_about_ies =
2914 (1ULL << WLAN_EID_COUNTRY) |
2915 (1ULL << WLAN_EID_ERP_INFO) |
2916 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2917 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2918 (1ULL << WLAN_EID_HT_CAPABILITY) |
2919 (1ULL << WLAN_EID_HT_OPERATION);
2921 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2922 struct ieee80211_mgmt *mgmt, size_t len,
2923 struct ieee80211_rx_status *rx_status)
2925 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2926 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2928 struct ieee802_11_elems elems;
2929 struct ieee80211_local *local = sdata->local;
2930 struct ieee80211_chanctx_conf *chanctx_conf;
2931 struct ieee80211_channel *chan;
2932 struct sta_info *sta;
2938 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2940 sdata_assert_lock(sdata);
2942 /* Process beacon from the current BSS */
2943 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2948 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2949 if (!chanctx_conf) {
2954 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2958 chan = chanctx_conf->def.chan;
2961 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2962 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2963 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2964 len - baselen, false, &elems);
2966 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2967 if (elems.tim && !elems.parse_error) {
2968 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2969 ifmgd->dtim_period = tim_ie->dtim_period;
2971 ifmgd->have_beacon = true;
2972 ifmgd->assoc_data->need_beacon = false;
2973 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2974 sdata->vif.bss_conf.sync_tsf =
2975 le64_to_cpu(mgmt->u.beacon.timestamp);
2976 sdata->vif.bss_conf.sync_device_ts =
2977 rx_status->device_timestamp;
2979 sdata->vif.bss_conf.sync_dtim_count =
2980 elems.tim->dtim_count;
2982 sdata->vif.bss_conf.sync_dtim_count = 0;
2984 /* continue assoc process */
2985 ifmgd->assoc_data->timeout = jiffies;
2986 ifmgd->assoc_data->timeout_started = true;
2987 run_again(sdata, ifmgd->assoc_data->timeout);
2991 if (!ifmgd->associated ||
2992 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2994 bssid = ifmgd->associated->bssid;
2996 /* Track average RSSI from the Beacon frames of the current AP */
2997 ifmgd->last_beacon_signal = rx_status->signal;
2998 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2999 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3000 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3001 ifmgd->last_cqm_event_signal = 0;
3002 ifmgd->count_beacon_signal = 1;
3003 ifmgd->last_ave_beacon_signal = 0;
3005 ifmgd->ave_beacon_signal =
3006 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3007 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3008 ifmgd->ave_beacon_signal) / 16;
3009 ifmgd->count_beacon_signal++;
3012 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3013 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3014 int sig = ifmgd->ave_beacon_signal;
3015 int last_sig = ifmgd->last_ave_beacon_signal;
3018 * if signal crosses either of the boundaries, invoke callback
3019 * with appropriate parameters
3021 if (sig > ifmgd->rssi_max_thold &&
3022 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3023 ifmgd->last_ave_beacon_signal = sig;
3024 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3025 } else if (sig < ifmgd->rssi_min_thold &&
3026 (last_sig >= ifmgd->rssi_max_thold ||
3028 ifmgd->last_ave_beacon_signal = sig;
3029 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3033 if (bss_conf->cqm_rssi_thold &&
3034 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3035 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3036 int sig = ifmgd->ave_beacon_signal / 16;
3037 int last_event = ifmgd->last_cqm_event_signal;
3038 int thold = bss_conf->cqm_rssi_thold;
3039 int hyst = bss_conf->cqm_rssi_hyst;
3041 (last_event == 0 || sig < last_event - hyst)) {
3042 ifmgd->last_cqm_event_signal = sig;
3043 ieee80211_cqm_rssi_notify(
3045 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3047 } else if (sig > thold &&
3048 (last_event == 0 || sig > last_event + hyst)) {
3049 ifmgd->last_cqm_event_signal = sig;
3050 ieee80211_cqm_rssi_notify(
3052 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3057 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3058 mlme_dbg_ratelimited(sdata,
3059 "cancelling AP probe due to a received beacon\n");
3060 ieee80211_reset_ap_probe(sdata);
3064 * Push the beacon loss detection into the future since
3065 * we are processing a beacon from the AP just now.
3067 ieee80211_sta_reset_beacon_monitor(sdata);
3069 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3070 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3071 len - baselen, false, &elems,
3072 care_about_ies, ncrc);
3074 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3075 bool directed_tim = ieee80211_check_tim(elems.tim,
3079 if (local->hw.conf.dynamic_ps_timeout > 0) {
3080 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3081 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3082 ieee80211_hw_config(local,
3083 IEEE80211_CONF_CHANGE_PS);
3085 ieee80211_send_nullfunc(local, sdata, 0);
3086 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3087 local->pspolling = true;
3090 * Here is assumed that the driver will be
3091 * able to send ps-poll frame and receive a
3092 * response even though power save mode is
3093 * enabled, but some drivers might require
3094 * to disable power save here. This needs
3095 * to be investigated.
3097 ieee80211_send_pspoll(local, sdata);
3102 if (sdata->vif.p2p) {
3103 struct ieee80211_p2p_noa_attr noa = {};
3106 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3108 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3109 (u8 *) &noa, sizeof(noa));
3111 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3112 /* valid noa_attr and index changed */
3113 sdata->u.mgd.p2p_noa_index = noa.index;
3114 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3115 changed |= BSS_CHANGED_P2P_PS;
3117 * make sure we update all information, the CRC
3118 * mechanism doesn't look at P2P attributes.
3120 ifmgd->beacon_crc_valid = false;
3122 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3123 /* noa_attr not found and we had valid noa_attr before */
3124 sdata->u.mgd.p2p_noa_index = -1;
3125 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3126 changed |= BSS_CHANGED_P2P_PS;
3127 ifmgd->beacon_crc_valid = false;
3131 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3133 ifmgd->beacon_crc = ncrc;
3134 ifmgd->beacon_crc_valid = true;
3136 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3138 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3141 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3142 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3143 elems.wmm_param_len))
3144 changed |= BSS_CHANGED_QOS;
3147 * If we haven't had a beacon before, tell the driver about the
3148 * DTIM period (and beacon timing if desired) now.
3150 if (!ifmgd->have_beacon) {
3151 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3153 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3155 bss_conf->dtim_period = 1;
3157 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3158 sdata->vif.bss_conf.sync_tsf =
3159 le64_to_cpu(mgmt->u.beacon.timestamp);
3160 sdata->vif.bss_conf.sync_device_ts =
3161 rx_status->device_timestamp;
3163 sdata->vif.bss_conf.sync_dtim_count =
3164 elems.tim->dtim_count;
3166 sdata->vif.bss_conf.sync_dtim_count = 0;
3169 changed |= BSS_CHANGED_BEACON_INFO;
3170 ifmgd->have_beacon = true;
3172 mutex_lock(&local->iflist_mtx);
3173 ieee80211_recalc_ps(local, -1);
3174 mutex_unlock(&local->iflist_mtx);
3176 ieee80211_recalc_ps_vif(sdata);
3179 if (elems.erp_info) {
3181 erp_value = elems.erp_info[0];
3185 changed |= ieee80211_handle_bss_capability(sdata,
3186 le16_to_cpu(mgmt->u.beacon.capab_info),
3187 erp_valid, erp_value);
3189 mutex_lock(&local->sta_mtx);
3190 sta = sta_info_get(sdata, bssid);
3192 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3193 elems.vht_operation, bssid, &changed)) {
3194 mutex_unlock(&local->sta_mtx);
3195 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3196 WLAN_REASON_DEAUTH_LEAVING,
3198 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3199 sizeof(deauth_buf));
3203 if (sta && elems.opmode_notif)
3204 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3205 rx_status->band, true);
3206 mutex_unlock(&local->sta_mtx);
3208 if (elems.country_elem && elems.pwr_constr_elem &&
3209 mgmt->u.probe_resp.capab_info &
3210 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3211 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3213 elems.country_elem_len,
3214 elems.pwr_constr_elem);
3216 ieee80211_bss_info_change_notify(sdata, changed);
3219 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3220 struct sk_buff *skb)
3222 struct ieee80211_rx_status *rx_status;
3223 struct ieee80211_mgmt *mgmt;
3225 struct ieee802_11_elems elems;
3228 rx_status = (struct ieee80211_rx_status *) skb->cb;
3229 mgmt = (struct ieee80211_mgmt *) skb->data;
3230 fc = le16_to_cpu(mgmt->frame_control);
3234 switch (fc & IEEE80211_FCTL_STYPE) {
3235 case IEEE80211_STYPE_BEACON:
3236 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3238 case IEEE80211_STYPE_PROBE_RESP:
3239 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3241 case IEEE80211_STYPE_AUTH:
3242 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3244 case IEEE80211_STYPE_DEAUTH:
3245 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3247 case IEEE80211_STYPE_DISASSOC:
3248 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3250 case IEEE80211_STYPE_ASSOC_RESP:
3251 case IEEE80211_STYPE_REASSOC_RESP:
3252 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3254 case IEEE80211_STYPE_ACTION:
3255 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3256 ies_len = skb->len -
3257 offsetof(struct ieee80211_mgmt,
3258 u.action.u.chan_switch.variable);
3263 ieee802_11_parse_elems(
3264 mgmt->u.action.u.chan_switch.variable,
3265 ies_len, true, &elems);
3267 if (elems.parse_error)
3270 ieee80211_sta_process_chanswitch(sdata,
3273 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3274 ies_len = skb->len -
3275 offsetof(struct ieee80211_mgmt,
3276 u.action.u.ext_chan_switch.variable);
3281 ieee802_11_parse_elems(
3282 mgmt->u.action.u.ext_chan_switch.variable,
3283 ies_len, true, &elems);
3285 if (elems.parse_error)
3288 /* for the handling code pretend this was also an IE */
3289 elems.ext_chansw_ie =
3290 &mgmt->u.action.u.ext_chan_switch.data;
3292 ieee80211_sta_process_chanswitch(sdata,
3298 sdata_unlock(sdata);
3301 static void ieee80211_sta_timer(unsigned long data)
3303 struct ieee80211_sub_if_data *sdata =
3304 (struct ieee80211_sub_if_data *) data;
3306 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3309 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3310 u8 *bssid, u8 reason, bool tx)
3312 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3314 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3317 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3318 IEEE80211_DEAUTH_FRAME_LEN);
3321 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3323 struct ieee80211_local *local = sdata->local;
3324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3325 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3328 sdata_assert_lock(sdata);
3330 if (WARN_ON_ONCE(!auth_data))
3335 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3336 sdata_info(sdata, "authentication with %pM timed out\n",
3337 auth_data->bss->bssid);
3340 * Most likely AP is not in the range so remove the
3341 * bss struct for that AP.
3343 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3348 drv_mgd_prepare_tx(local, sdata);
3350 if (auth_data->bss->proberesp_ies) {
3354 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3355 auth_data->bss->bssid, auth_data->tries,
3356 IEEE80211_AUTH_MAX_TRIES);
3358 auth_data->expected_transaction = 2;
3360 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3361 trans = auth_data->sae_trans;
3362 status = auth_data->sae_status;
3363 auth_data->expected_transaction = trans;
3366 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3367 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3368 IEEE80211_TX_INTFL_MLME_CONN_TX;
3370 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3371 auth_data->data, auth_data->data_len,
3372 auth_data->bss->bssid,
3373 auth_data->bss->bssid, NULL, 0, 0,
3378 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3379 auth_data->bss->bssid, auth_data->tries,
3380 IEEE80211_AUTH_MAX_TRIES);
3383 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3389 * Direct probe is sent to broadcast address as some APs
3390 * will not answer to direct packet in unassociated state.
3392 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3393 NULL, 0, (u32) -1, true, 0,
3394 auth_data->bss->channel, false);
3398 if (tx_flags == 0) {
3399 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3400 auth_data->timeout_started = true;
3401 run_again(sdata, auth_data->timeout);
3403 auth_data->timeout =
3404 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3405 auth_data->timeout_started = true;
3406 run_again(sdata, auth_data->timeout);
3412 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3414 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3415 struct ieee80211_local *local = sdata->local;
3417 sdata_assert_lock(sdata);
3419 assoc_data->tries++;
3420 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3421 sdata_info(sdata, "association with %pM timed out\n",
3422 assoc_data->bss->bssid);
3425 * Most likely AP is not in the range so remove the
3426 * bss struct for that AP.
3428 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3433 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3434 assoc_data->bss->bssid, assoc_data->tries,
3435 IEEE80211_ASSOC_MAX_TRIES);
3436 ieee80211_send_assoc(sdata);
3438 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3439 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3440 assoc_data->timeout_started = true;
3441 run_again(sdata, assoc_data->timeout);
3443 assoc_data->timeout =
3444 round_jiffies_up(jiffies +
3445 IEEE80211_ASSOC_TIMEOUT_LONG);
3446 assoc_data->timeout_started = true;
3447 run_again(sdata, assoc_data->timeout);
3453 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3454 __le16 fc, bool acked)
3456 struct ieee80211_local *local = sdata->local;
3458 sdata->u.mgd.status_fc = fc;
3459 sdata->u.mgd.status_acked = acked;
3460 sdata->u.mgd.status_received = true;
3462 ieee80211_queue_work(&local->hw, &sdata->work);
3465 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3467 struct ieee80211_local *local = sdata->local;
3468 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3472 if (ifmgd->status_received) {
3473 __le16 fc = ifmgd->status_fc;
3474 bool status_acked = ifmgd->status_acked;
3476 ifmgd->status_received = false;
3477 if (ifmgd->auth_data &&
3478 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3480 ifmgd->auth_data->timeout =
3481 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3482 run_again(sdata, ifmgd->auth_data->timeout);
3484 ifmgd->auth_data->timeout = jiffies - 1;
3486 ifmgd->auth_data->timeout_started = true;
3487 } else if (ifmgd->assoc_data &&
3488 (ieee80211_is_assoc_req(fc) ||
3489 ieee80211_is_reassoc_req(fc))) {
3491 ifmgd->assoc_data->timeout =
3492 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3493 run_again(sdata, ifmgd->assoc_data->timeout);
3495 ifmgd->assoc_data->timeout = jiffies - 1;
3497 ifmgd->assoc_data->timeout_started = true;
3501 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3502 time_after(jiffies, ifmgd->auth_data->timeout)) {
3503 if (ifmgd->auth_data->done) {
3505 * ok ... we waited for assoc but userspace didn't,
3506 * so let's just kill the auth data
3508 ieee80211_destroy_auth_data(sdata, false);
3509 } else if (ieee80211_probe_auth(sdata)) {
3512 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3514 ieee80211_destroy_auth_data(sdata, false);
3516 cfg80211_auth_timeout(sdata->dev, bssid);
3518 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3519 run_again(sdata, ifmgd->auth_data->timeout);
3521 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3522 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3523 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3524 ieee80211_do_assoc(sdata)) {
3525 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3527 ieee80211_destroy_assoc_data(sdata, false);
3528 cfg80211_assoc_timeout(sdata->dev, bss);
3530 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3531 run_again(sdata, ifmgd->assoc_data->timeout);
3533 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3534 ifmgd->associated) {
3538 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3540 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3541 max_tries = max_nullfunc_tries;
3543 max_tries = max_probe_tries;
3545 /* ACK received for nullfunc probing frame */
3546 if (!ifmgd->probe_send_count)
3547 ieee80211_reset_ap_probe(sdata);
3548 else if (ifmgd->nullfunc_failed) {
3549 if (ifmgd->probe_send_count < max_tries) {
3551 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3552 bssid, ifmgd->probe_send_count,
3554 ieee80211_mgd_probe_ap_send(sdata);
3557 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3559 ieee80211_sta_connection_lost(sdata, bssid,
3560 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3563 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3564 run_again(sdata, ifmgd->probe_timeout);
3565 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3567 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3568 bssid, probe_wait_ms);
3569 ieee80211_sta_connection_lost(sdata, bssid,
3570 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3571 } else if (ifmgd->probe_send_count < max_tries) {
3573 "No probe response from AP %pM after %dms, try %d/%i\n",
3574 bssid, probe_wait_ms,
3575 ifmgd->probe_send_count, max_tries);
3576 ieee80211_mgd_probe_ap_send(sdata);
3579 * We actually lost the connection ... or did we?
3582 wiphy_debug(local->hw.wiphy,
3583 "%s: No probe response from AP %pM"
3584 " after %dms, disconnecting.\n",
3586 bssid, probe_wait_ms);
3588 ieee80211_sta_connection_lost(sdata, bssid,
3589 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3593 sdata_unlock(sdata);
3596 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3598 struct ieee80211_sub_if_data *sdata =
3599 (struct ieee80211_sub_if_data *) data;
3600 struct ieee80211_local *local = sdata->local;
3602 if (local->quiescing)
3605 if (sdata->vif.csa_active)
3608 sdata->u.mgd.connection_loss = false;
3609 ieee80211_queue_work(&sdata->local->hw,
3610 &sdata->u.mgd.beacon_connection_loss_work);
3613 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3615 struct ieee80211_sub_if_data *sdata =
3616 (struct ieee80211_sub_if_data *) data;
3617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3618 struct ieee80211_local *local = sdata->local;
3620 if (local->quiescing)
3623 if (sdata->vif.csa_active)
3626 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3629 static void ieee80211_sta_monitor_work(struct work_struct *work)
3631 struct ieee80211_sub_if_data *sdata =
3632 container_of(work, struct ieee80211_sub_if_data,
3633 u.mgd.monitor_work);
3635 ieee80211_mgd_probe_ap(sdata, false);
3638 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3642 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3643 __ieee80211_stop_poll(sdata);
3645 /* let's probe the connection once */
3646 flags = sdata->local->hw.flags;
3647 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3648 ieee80211_queue_work(&sdata->local->hw,
3649 &sdata->u.mgd.monitor_work);
3650 /* and do all the other regular work too */
3651 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3656 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3658 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3659 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3663 if (ifmgd->auth_data || ifmgd->assoc_data) {
3664 const u8 *bssid = ifmgd->auth_data ?
3665 ifmgd->auth_data->bss->bssid :
3666 ifmgd->assoc_data->bss->bssid;
3669 * If we are trying to authenticate / associate while suspending,
3670 * cfg80211 won't know and won't actually abort those attempts,
3671 * thus we need to do that ourselves.
3673 ieee80211_send_deauth_disassoc(sdata, bssid,
3674 IEEE80211_STYPE_DEAUTH,
3675 WLAN_REASON_DEAUTH_LEAVING,
3677 if (ifmgd->assoc_data)
3678 ieee80211_destroy_assoc_data(sdata, false);
3679 if (ifmgd->auth_data)
3680 ieee80211_destroy_auth_data(sdata, false);
3681 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3682 IEEE80211_DEAUTH_FRAME_LEN);
3685 sdata_unlock(sdata);
3688 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3690 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3693 if (!ifmgd->associated) {
3694 sdata_unlock(sdata);
3698 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3699 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3700 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3701 ieee80211_sta_connection_lost(sdata,
3702 ifmgd->associated->bssid,
3703 WLAN_REASON_UNSPECIFIED,
3705 sdata_unlock(sdata);
3708 sdata_unlock(sdata);
3712 /* interface setup */
3713 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3715 struct ieee80211_if_managed *ifmgd;
3717 ifmgd = &sdata->u.mgd;
3718 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3719 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3720 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3721 ieee80211_beacon_connection_loss_work);
3722 INIT_WORK(&ifmgd->csa_connection_drop_work,
3723 ieee80211_csa_connection_drop_work);
3724 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3725 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3726 (unsigned long) sdata);
3727 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3728 (unsigned long) sdata);
3729 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3730 (unsigned long) sdata);
3731 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3732 (unsigned long) sdata);
3735 ifmgd->powersave = sdata->wdev.ps;
3736 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3737 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3738 ifmgd->p2p_noa_index = -1;
3740 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3741 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3743 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3746 /* scan finished notification */
3747 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3749 struct ieee80211_sub_if_data *sdata;
3751 /* Restart STA timers */
3753 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3754 if (ieee80211_sdata_running(sdata))
3755 ieee80211_restart_sta_timer(sdata);
3760 int ieee80211_max_network_latency(struct notifier_block *nb,
3761 unsigned long data, void *dummy)
3763 s32 latency_usec = (s32) data;
3764 struct ieee80211_local *local =
3765 container_of(nb, struct ieee80211_local,
3766 network_latency_notifier);
3768 mutex_lock(&local->iflist_mtx);
3769 ieee80211_recalc_ps(local, latency_usec);
3770 mutex_unlock(&local->iflist_mtx);
3775 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3776 struct cfg80211_bss *cbss)
3778 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3779 const u8 *ht_cap_ie, *vht_cap_ie;
3780 const struct ieee80211_ht_cap *ht_cap;
3781 const struct ieee80211_vht_cap *vht_cap;
3784 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3787 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3788 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3789 ht_cap = (void *)(ht_cap_ie + 2);
3790 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3792 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3793 * "Tx Unequal Modulation Supported" fields.
3797 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3800 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3801 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3805 vht_cap = (void *)(vht_cap_ie + 2);
3806 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3807 for (nss = 8; nss > 0; nss--) {
3808 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3809 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3812 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3813 chains = max(chains, nss);
3819 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3820 struct cfg80211_bss *cbss)
3822 struct ieee80211_local *local = sdata->local;
3823 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3824 const struct ieee80211_ht_operation *ht_oper = NULL;
3825 const struct ieee80211_vht_operation *vht_oper = NULL;
3826 struct ieee80211_supported_band *sband;
3827 struct cfg80211_chan_def chandef;
3830 sband = local->hw.wiphy->bands[cbss->channel->band];
3832 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3833 IEEE80211_STA_DISABLE_80P80MHZ |
3834 IEEE80211_STA_DISABLE_160MHZ);
3838 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3839 sband->ht_cap.ht_supported) {
3840 const u8 *ht_oper_ie, *ht_cap;
3842 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3843 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3844 ht_oper = (void *)(ht_oper_ie + 2);
3846 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3847 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3848 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3853 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3854 sband->vht_cap.vht_supported) {
3855 const u8 *vht_oper_ie, *vht_cap;
3857 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3858 WLAN_EID_VHT_OPERATION);
3859 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3860 vht_oper = (void *)(vht_oper_ie + 2);
3861 if (vht_oper && !ht_oper) {
3864 "AP advertised VHT without HT, disabling both\n");
3865 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3866 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3869 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3870 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3871 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3876 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3881 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3886 /* will change later if needed */
3887 sdata->smps_mode = IEEE80211_SMPS_OFF;
3889 mutex_lock(&local->mtx);
3891 * If this fails (possibly due to channel context sharing
3892 * on incompatible channels, e.g. 80+80 and 160 sharing the
3893 * same control channel) try to use a smaller bandwidth.
3895 ret = ieee80211_vif_use_channel(sdata, &chandef,
3896 IEEE80211_CHANCTX_SHARED);
3898 /* don't downgrade for 5 and 10 MHz channels, though. */
3899 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3900 chandef.width == NL80211_CHAN_WIDTH_10)
3903 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3904 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
3905 ret = ieee80211_vif_use_channel(sdata, &chandef,
3906 IEEE80211_CHANCTX_SHARED);
3909 mutex_unlock(&local->mtx);
3913 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3914 struct cfg80211_bss *cbss, bool assoc)
3916 struct ieee80211_local *local = sdata->local;
3917 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3918 struct ieee80211_bss *bss = (void *)cbss->priv;
3919 struct sta_info *new_sta = NULL;
3920 bool have_sta = false;
3923 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3928 have_sta = sta_info_get(sdata, cbss->bssid);
3933 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3938 u32 rates = 0, basic_rates = 0;
3939 bool have_higher_than_11mbit;
3940 int min_rate = INT_MAX, min_rate_index = -1;
3941 struct ieee80211_chanctx_conf *chanctx_conf;
3942 struct ieee80211_supported_band *sband;
3943 const struct cfg80211_bss_ies *ies;
3947 sband = local->hw.wiphy->bands[cbss->channel->band];
3949 err = ieee80211_prep_channel(sdata, cbss);
3951 sta_info_free(local, new_sta);
3954 shift = ieee80211_vif_get_shift(&sdata->vif);
3957 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3958 if (WARN_ON(!chanctx_conf)) {
3960 sta_info_free(local, new_sta);
3963 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3966 ieee80211_get_rates(sband, bss->supp_rates,
3967 bss->supp_rates_len,
3968 &rates, &basic_rates,
3969 &have_higher_than_11mbit,
3970 &min_rate, &min_rate_index,
3974 * This used to be a workaround for basic rates missing
3975 * in the association response frame. Now that we no
3976 * longer use the basic rates from there, it probably
3977 * doesn't happen any more, but keep the workaround so
3978 * in case some *other* APs are buggy in different ways
3979 * we can connect -- with a warning.
3981 if (!basic_rates && min_rate_index >= 0) {
3983 "No basic rates, using min rate instead\n");
3984 basic_rates = BIT(min_rate_index);
3987 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3988 sdata->vif.bss_conf.basic_rates = basic_rates;
3990 /* cf. IEEE 802.11 9.2.12 */
3991 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3992 have_higher_than_11mbit)
3993 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3995 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3997 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3999 /* set timing information */
4000 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4002 ies = rcu_dereference(cbss->beacon_ies);
4006 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4007 sdata->vif.bss_conf.sync_device_ts =
4008 bss->device_ts_beacon;
4009 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4010 ies->data, ies->len);
4011 if (tim_ie && tim_ie[1] >= 2)
4012 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4014 sdata->vif.bss_conf.sync_dtim_count = 0;
4015 } else if (!(local->hw.flags &
4016 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4017 ies = rcu_dereference(cbss->proberesp_ies);
4018 /* must be non-NULL since beacon IEs were NULL */
4019 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4020 sdata->vif.bss_conf.sync_device_ts =
4021 bss->device_ts_presp;
4022 sdata->vif.bss_conf.sync_dtim_count = 0;
4024 sdata->vif.bss_conf.sync_tsf = 0;
4025 sdata->vif.bss_conf.sync_device_ts = 0;
4026 sdata->vif.bss_conf.sync_dtim_count = 0;
4030 /* tell driver about BSSID, basic rates and timing */
4031 ieee80211_bss_info_change_notify(sdata,
4032 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4033 BSS_CHANGED_BEACON_INT);
4036 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4038 err = sta_info_insert(new_sta);
4042 "failed to insert STA entry for the AP (error %d)\n",
4047 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4053 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4054 struct cfg80211_auth_request *req)
4056 struct ieee80211_local *local = sdata->local;
4057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4058 struct ieee80211_mgd_auth_data *auth_data;
4062 /* prepare auth data structure */
4064 switch (req->auth_type) {
4065 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4066 auth_alg = WLAN_AUTH_OPEN;
4068 case NL80211_AUTHTYPE_SHARED_KEY:
4069 if (IS_ERR(local->wep_tx_tfm))
4071 auth_alg = WLAN_AUTH_SHARED_KEY;
4073 case NL80211_AUTHTYPE_FT:
4074 auth_alg = WLAN_AUTH_FT;
4076 case NL80211_AUTHTYPE_NETWORK_EAP:
4077 auth_alg = WLAN_AUTH_LEAP;
4079 case NL80211_AUTHTYPE_SAE:
4080 auth_alg = WLAN_AUTH_SAE;
4086 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4087 req->ie_len, GFP_KERNEL);
4091 auth_data->bss = req->bss;
4093 if (req->sae_data_len >= 4) {
4094 __le16 *pos = (__le16 *) req->sae_data;
4095 auth_data->sae_trans = le16_to_cpu(pos[0]);
4096 auth_data->sae_status = le16_to_cpu(pos[1]);
4097 memcpy(auth_data->data, req->sae_data + 4,
4098 req->sae_data_len - 4);
4099 auth_data->data_len += req->sae_data_len - 4;
4102 if (req->ie && req->ie_len) {
4103 memcpy(&auth_data->data[auth_data->data_len],
4104 req->ie, req->ie_len);
4105 auth_data->data_len += req->ie_len;
4108 if (req->key && req->key_len) {
4109 auth_data->key_len = req->key_len;
4110 auth_data->key_idx = req->key_idx;
4111 memcpy(auth_data->key, req->key, req->key_len);
4114 auth_data->algorithm = auth_alg;
4116 /* try to authenticate/probe */
4118 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4119 ifmgd->assoc_data) {
4124 if (ifmgd->auth_data)
4125 ieee80211_destroy_auth_data(sdata, false);
4127 /* prep auth_data so we don't go into idle on disassoc */
4128 ifmgd->auth_data = auth_data;
4130 if (ifmgd->associated) {
4131 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4133 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4134 WLAN_REASON_UNSPECIFIED,
4137 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4141 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4143 err = ieee80211_prep_connection(sdata, req->bss, false);
4147 err = ieee80211_probe_auth(sdata);
4149 sta_info_destroy_addr(sdata, req->bss->bssid);
4153 /* hold our own reference */
4154 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4158 memset(ifmgd->bssid, 0, ETH_ALEN);
4159 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4160 ifmgd->auth_data = NULL;
4166 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4167 const u8 *wmm_param, int len)
4175 if (wmm_param[5] != 1 /* version */)
4178 pos = wmm_param + 8;
4181 for (; left >= 4; left -= 4, pos += 4) {
4182 u8 aifsn = pos[0] & 0x0f;
4183 u8 ecwmin = pos[1] & 0x0f;
4184 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4185 int aci = (pos[0] >> 5) & 0x03;
4189 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4193 if (ecwmin > ecwmax) {
4195 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4196 ecwmin, ecwmax, aci);
4204 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4205 struct cfg80211_assoc_request *req)
4207 struct ieee80211_local *local = sdata->local;
4208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4209 struct ieee80211_bss *bss = (void *)req->bss->priv;
4210 struct ieee80211_mgd_assoc_data *assoc_data;
4211 const struct cfg80211_bss_ies *beacon_ies;
4212 struct ieee80211_supported_band *sband;
4213 const u8 *ssidie, *ht_ie, *vht_ie;
4216 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4221 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4227 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4228 assoc_data->ssid_len = ssidie[1];
4231 if (ifmgd->associated) {
4232 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4234 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4235 WLAN_REASON_UNSPECIFIED,
4238 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4242 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4247 if (ifmgd->assoc_data) {
4252 if (ifmgd->auth_data) {
4255 /* keep sta info, bssid if matching */
4256 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4257 ieee80211_destroy_auth_data(sdata, match);
4260 /* prepare assoc data */
4262 ifmgd->beacon_crc_valid = false;
4264 assoc_data->wmm = bss->wmm_used &&
4265 (local->hw.queues >= IEEE80211_NUM_ACS);
4266 if (assoc_data->wmm) {
4267 /* try to check validity of WMM params IE */
4268 const struct cfg80211_bss_ies *ies;
4269 const u8 *wp, *start, *end;
4272 ies = rcu_dereference(req->bss->ies);
4274 end = start + ies->len;
4277 wp = cfg80211_find_vendor_ie(
4279 WLAN_OUI_TYPE_MICROSOFT_WMM,
4280 start, end - start);
4283 start = wp + wp[1] + 2;
4284 /* if this IE is too short, try the next */
4287 /* if this IE is WMM params, we found what we wanted */
4292 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4294 assoc_data->wmm = false;
4295 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4301 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4302 * We still associate in non-HT mode (11a/b/g) if any one of these
4303 * ciphers is configured as pairwise.
4304 * We can set this to true for non-11n hardware, that'll be checked
4305 * separately along with the peer capabilities.
4307 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4308 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4309 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4310 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4311 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4312 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4313 netdev_info(sdata->dev,
4314 "disabling HT/VHT due to WEP/TKIP use\n");
4318 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4319 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4320 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4323 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4324 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4326 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4327 sband = local->hw.wiphy->bands[req->bss->channel->band];
4328 if (!sband->ht_cap.ht_supported ||
4329 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4330 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4331 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4332 if (!bss->wmm_used &&
4333 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4334 netdev_info(sdata->dev,
4335 "disabling HT as WMM/QoS is not supported by the AP\n");
4338 /* disable VHT if we don't support it or the AP doesn't use WMM */
4339 if (!sband->vht_cap.vht_supported ||
4340 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4341 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4342 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4343 if (!bss->wmm_used &&
4344 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4345 netdev_info(sdata->dev,
4346 "disabling VHT as WMM/QoS is not supported by the AP\n");
4349 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4350 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4351 sizeof(ifmgd->ht_capa_mask));
4353 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4354 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4355 sizeof(ifmgd->vht_capa_mask));
4357 if (req->ie && req->ie_len) {
4358 memcpy(assoc_data->ie, req->ie, req->ie_len);
4359 assoc_data->ie_len = req->ie_len;
4362 assoc_data->bss = req->bss;
4364 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4365 if (ifmgd->powersave)
4366 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4368 sdata->smps_mode = IEEE80211_SMPS_OFF;
4370 sdata->smps_mode = ifmgd->req_smps;
4372 assoc_data->capability = req->bss->capability;
4373 assoc_data->supp_rates = bss->supp_rates;
4374 assoc_data->supp_rates_len = bss->supp_rates_len;
4377 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4378 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4379 assoc_data->ap_ht_param =
4380 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4382 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4383 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4384 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4385 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4386 sizeof(struct ieee80211_vht_cap));
4388 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4391 if (bss->wmm_used && bss->uapsd_supported &&
4392 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4393 sdata->wmm_acm != 0xff) {
4394 assoc_data->uapsd = true;
4395 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4397 assoc_data->uapsd = false;
4398 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4401 if (req->prev_bssid)
4402 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4405 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4406 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4408 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4409 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4412 if (req->crypto.control_port)
4413 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4415 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4417 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4418 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4419 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4422 /* kick off associate process */
4424 ifmgd->assoc_data = assoc_data;
4425 ifmgd->dtim_period = 0;
4426 ifmgd->have_beacon = false;
4428 err = ieee80211_prep_connection(sdata, req->bss, true);
4433 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4435 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4438 * Wait up to one beacon interval ...
4439 * should this be more if we miss one?
4441 sdata_info(sdata, "waiting for beacon from %pM\n",
4443 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4444 assoc_data->timeout_started = true;
4445 assoc_data->need_beacon = true;
4446 } else if (beacon_ies) {
4447 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4452 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4453 const struct ieee80211_tim_ie *tim;
4454 tim = (void *)(tim_ie + 2);
4455 ifmgd->dtim_period = tim->dtim_period;
4456 dtim_count = tim->dtim_count;
4458 ifmgd->have_beacon = true;
4459 assoc_data->timeout = jiffies;
4460 assoc_data->timeout_started = true;
4462 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4463 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4464 sdata->vif.bss_conf.sync_device_ts =
4465 bss->device_ts_beacon;
4466 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4469 assoc_data->timeout = jiffies;
4470 assoc_data->timeout_started = true;
4474 run_again(sdata, assoc_data->timeout);
4476 if (bss->corrupt_data) {
4477 char *corrupt_type = "data";
4478 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4479 if (bss->corrupt_data &
4480 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4481 corrupt_type = "beacon and probe response";
4483 corrupt_type = "beacon";
4484 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4485 corrupt_type = "probe response";
4486 sdata_info(sdata, "associating with AP with corrupt %s\n",
4492 memset(ifmgd->bssid, 0, ETH_ALEN);
4493 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4494 ifmgd->assoc_data = NULL;
4500 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4501 struct cfg80211_deauth_request *req)
4503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4504 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4505 bool tx = !req->local_state_change;
4507 if (ifmgd->auth_data &&
4508 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4510 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4511 req->bssid, req->reason_code,
4512 ieee80211_get_reason_code_string(req->reason_code));
4514 drv_mgd_prepare_tx(sdata->local, sdata);
4515 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4516 IEEE80211_STYPE_DEAUTH,
4517 req->reason_code, tx,
4519 ieee80211_destroy_auth_data(sdata, false);
4520 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4521 IEEE80211_DEAUTH_FRAME_LEN);
4526 if (ifmgd->associated &&
4527 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4529 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4530 req->bssid, req->reason_code,
4531 ieee80211_get_reason_code_string(req->reason_code));
4533 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4534 req->reason_code, tx, frame_buf);
4535 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4536 IEEE80211_DEAUTH_FRAME_LEN);
4543 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4544 struct cfg80211_disassoc_request *req)
4546 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4548 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4551 * cfg80211 should catch this ... but it's racy since
4552 * we can receive a disassoc frame, process it, hand it
4553 * to cfg80211 while that's in a locked section already
4554 * trying to tell us that the user wants to disconnect.
4556 if (ifmgd->associated != req->bss)
4560 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4561 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4563 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4564 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4565 req->reason_code, !req->local_state_change,
4568 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4569 IEEE80211_DEAUTH_FRAME_LEN);
4574 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4576 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4579 * Make sure some work items will not run after this,
4580 * they will not do anything but might not have been
4581 * cancelled when disconnecting.
4583 cancel_work_sync(&ifmgd->monitor_work);
4584 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4585 cancel_work_sync(&ifmgd->request_smps_work);
4586 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4587 cancel_work_sync(&ifmgd->chswitch_work);
4590 if (ifmgd->assoc_data) {
4591 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4592 ieee80211_destroy_assoc_data(sdata, false);
4593 cfg80211_assoc_timeout(sdata->dev, bss);
4595 if (ifmgd->auth_data)
4596 ieee80211_destroy_auth_data(sdata, false);
4597 del_timer_sync(&ifmgd->timer);
4598 sdata_unlock(sdata);
4601 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4602 enum nl80211_cqm_rssi_threshold_event rssi_event,
4605 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4607 trace_api_cqm_rssi_notify(sdata, rssi_event);
4609 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4611 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);