mlme.c source code [Linux/net/mac80211/mlme.c]

1	// SPDX-License-Identifier: GPL-2.0-only
2	/*
3	* BSS client mode implementation
4	* Copyright 2003-2008, Jouni Malinen <j@w1.fi>
5	* Copyright 2004, Instant802 Networks, Inc.
6	* Copyright 2005, Devicescape Software, Inc.
7	* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8	* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9	* Copyright 2013-2014 Intel Mobile Communications GmbH
10	* Copyright (C) 2015 - 2017 Intel Deutschland GmbH
11	* Copyright (C) 2018 - 2025 Intel Corporation
12	*/
13
14	#include <linux/delay.h>
15	#include <linux/fips.h>
16	#include <linux/if_ether.h>
17	#include <linux/skbuff.h>
18	#include <linux/if_arp.h>
19	#include <linux/etherdevice.h>
20	#include <linux/moduleparam.h>
21	#include <linux/rtnetlink.h>
22	#include <linux/crc32.h>
23	#include <linux/slab.h>
24	#include <linux/export.h>
25	#include <net/mac80211.h>
26	#include <linux/unaligned.h>
27
28	#include "ieee80211_i.h"
29	#include "driver-ops.h"
30	#include "rate.h"
31	#include "led.h"
32	#include "fils_aead.h"
33
34	#include <kunit/static_stub.h>
35
36	#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
37	#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
38	#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
39	#define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2)
40	#define IEEE80211_AUTH_MAX_TRIES 3
41	#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
42	#define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2)
43	#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
44	#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
45	#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
46	#define IEEE80211_ASSOC_MAX_TRIES 3
47
48	#define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100)
49	#define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00
50
51	#define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5)
52
53	static int max_nullfunc_tries = `2`;
54	module_param(max_nullfunc_tries, int, `0644`);
55	MODULE_PARM_DESC(max_nullfunc_tries,
56	"Maximum nullfunc tx tries before disconnecting (reason 4).");
57
58	static int max_probe_tries = `5`;
59	module_param(max_probe_tries, int, `0644`);
60	MODULE_PARM_DESC(max_probe_tries,
61	"Maximum probe tries before disconnecting (reason 4).");
62
63	/*
64	* Beacon loss timeout is calculated as N frames times the
65	* advertised beacon interval. This may need to be somewhat
66	* higher than what hardware might detect to account for
67	* delays in the host processing frames. But since we also
68	* probe on beacon miss before declaring the connection lost
69	* default to what we want.
70	*/
71	static int beacon_loss_count = `7`;
72	module_param(beacon_loss_count, int, `0644`);
73	MODULE_PARM_DESC(beacon_loss_count,
74	"Number of beacon intervals before we decide beacon was lost.");
75
76	/*
77	* Time the connection can be idle before we probe
78	* it to see if we can still talk to the AP.
79	*/
80	#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
81	/*
82	* Time we wait for a probe response after sending
83	* a probe request because of beacon loss or for
84	* checking the connection still works.
85	*/
86	static int probe_wait_ms = `500`;
87	module_param(probe_wait_ms, int, `0644`);
88	MODULE_PARM_DESC(probe_wait_ms,
89	"Maximum time(ms) to wait for probe response"
90	" before disconnecting (reason 4).");
91
92	/*
93	* How many Beacon frames need to have been used in average signal strength
94	* before starting to indicate signal change events.
95	*/
96	#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
97
98	/*
99	* We can have multiple work items (and connection probing)
100	* scheduling this timer, but we need to take care to only
101	* reschedule it when it should fire _earlier_ than it was
102	* asked for before, or if it's not pending right now. This
103	* function ensures that. Note that it then is required to
104	* run this function for all timeouts after the first one
105	* has happened -- the work that runs from this timer will
106	* do that.
107	*/
108	static void run_again(struct ieee80211_sub_if_data *sdata,
109	unsigned long timeout)
110	{
111	lockdep_assert_wiphy(sdata->local->hw.wiphy);
112
113	if (!timer_pending(timer: &sdata->u.mgd.timer) \|\|
114	time_before(timeout, sdata->u.mgd.timer.expires))
115	mod_timer(timer: &sdata->u.mgd.timer, expires: timeout);
116	}
117
118	void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
119	{
120	if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
121	return;
122
123	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
124	return;
125
126	mod_timer(timer: &sdata->u.mgd.bcn_mon_timer,
127	expires: round_jiffies_up(j: jiffies + sdata->u.mgd.beacon_timeout));
128	}
129
130	void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
131	{
132	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133
134	if (unlikely(!ifmgd->associated))
135	return;
136
137	if (ifmgd->probe_send_count)
138	ifmgd->probe_send_count = `0`;
139
140	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
141	return;
142
143	mod_timer(timer: &ifmgd->conn_mon_timer,
144	expires: round_jiffies_up(j: jiffies + IEEE80211_CONNECTION_IDLE_TIME));
145	}
146
147	static int ecw2cw(int ecw)
148	{
149	return (`1` << ecw) - `1`;
150	}
151
152	static enum ieee80211_conn_mode
153	ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata,
154	struct ieee80211_channel *channel,
155	u32 vht_cap_info,
156	const struct ieee802_11_elems *elems,
157	bool ignore_ht_channel_mismatch,
158	const struct ieee80211_conn_settings *conn,
159	struct cfg80211_chan_def *chandef)
160	{
161	const struct ieee80211_ht_operation *ht_oper = elems->ht_operation;
162	const struct ieee80211_vht_operation *vht_oper = elems->vht_operation;
163	const struct ieee80211_he_operation *he_oper = elems->he_operation;
164	const struct ieee80211_eht_operation *eht_oper = elems->eht_operation;
165	struct ieee80211_supported_band *sband =
166	sdata->local->hw.wiphy->bands[channel->band];
167	struct cfg80211_chan_def vht_chandef;
168	bool no_vht = false;
169	u32 ht_cfreq;
170
171	if (ieee80211_hw_check(&sdata->local->hw, STRICT))
172	ignore_ht_channel_mismatch = false;
173
174	chandef = (struct* cfg80211_chan_def) {
175	.chan = channel,
176	.width = NL80211_CHAN_WIDTH_20_NOHT,
177	.center_freq1 = channel->center_freq,
178	.freq1_offset = channel->freq_offset,
179	};
180
181	/ get special S1G case out of the way /
182	if (sband->band == NL80211_BAND_S1GHZ) {
183	if (!ieee80211_chandef_s1g_oper(local: sdata->local, oper: elems->s1g_oper,
184	chandef)) {
185	/ Fallback to default 1MHz /
186	chandef->width = NL80211_CHAN_WIDTH_1;
187	chandef->s1g_primary_2mhz = false;
188	}
189
190	return IEEE80211_CONN_MODE_S1G;
191	}
192
193	/ get special 6 GHz case out of the way /
194	if (sband->band == NL80211_BAND_6GHZ) {
195	enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT;
196
197	/ this is an error /
198	if (conn->mode < IEEE80211_CONN_MODE_HE)
199	return IEEE80211_CONN_MODE_LEGACY;
200
201	if (!elems->he_6ghz_capa \|\| !elems->he_cap) {
202	sdata_info(sdata,
203	"HE 6 GHz AP is missing HE/HE 6 GHz band capability\n");
204	return IEEE80211_CONN_MODE_LEGACY;
205	}
206
207	if (!eht_oper \|\| !elems->eht_cap) {
208	eht_oper = NULL;
209	mode = IEEE80211_CONN_MODE_HE;
210	}
211
212	if (!ieee80211_chandef_he_6ghz_oper(local: sdata->local, he_oper,
213	eht_oper, chandef)) {
214	sdata_info(sdata, "bad HE/EHT 6 GHz operation\n");
215	return IEEE80211_CONN_MODE_LEGACY;
216	}
217
218	return mode;
219	}
220
221	/ now we have the progression HT, VHT, ... /
222	if (conn->mode < IEEE80211_CONN_MODE_HT)
223	return IEEE80211_CONN_MODE_LEGACY;
224
225	if (!ht_oper \|\| !elems->ht_cap_elem)
226	return IEEE80211_CONN_MODE_LEGACY;
227
228	chandef->width = NL80211_CHAN_WIDTH_20;
229
230	ht_cfreq = ieee80211_channel_to_frequency(chan: ht_oper->primary_chan,
231	band: channel->band);
232	/ check that channel matches the right operating channel /
233	if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) {
234	/*
235	* It's possible that some APs are confused here;
236	* Netgear WNDR3700 sometimes reports 4 higher than
237	* the actual channel in association responses, but
238	* since we look at probe response/beacon data here
239	* it should be OK.
240	*/
241	sdata_info(sdata,
242	"Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
243	channel->center_freq, ht_cfreq,
244	ht_oper->primary_chan, channel->band);
245	return IEEE80211_CONN_MODE_LEGACY;
246	}
247
248	ieee80211_chandef_ht_oper(ht_oper, chandef);
249
250	if (conn->mode < IEEE80211_CONN_MODE_VHT)
251	return IEEE80211_CONN_MODE_HT;
252
253	vht_chandef = *chandef;
254
255	/*
256	* having he_cap/he_oper parsed out implies we're at
257	* least operating as HE STA
258	*/
259	if (elems->he_cap && he_oper &&
260	he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
261	struct ieee80211_vht_operation he_oper_vht_cap;
262
263	/*
264	* Set only first 3 bytes (other 2 aren't used in
265	* ieee80211_chandef_vht_oper() anyway)
266	*/
267	memcpy(to: &he_oper_vht_cap, from: he_oper->optional, len: `3`);
268	he_oper_vht_cap.basic_mcs_set = cpu_to_le16(`0`);
269
270	if (!ieee80211_chandef_vht_oper(hw: &sdata->local->hw, vht_cap_info,
271	oper: &he_oper_vht_cap, htop: ht_oper,
272	chandef: &vht_chandef)) {
273	sdata_info(sdata,
274	"HE AP VHT information is invalid, disabling HE\n");
275	/ this will cause us to re-parse as VHT STA /
276	return IEEE80211_CONN_MODE_VHT;
277	}
278	} else if (!vht_oper \|\| !elems->vht_cap_elem) {
279	if (sband->band == NL80211_BAND_5GHZ) {
280	sdata_info(sdata,
281	"VHT information is missing, disabling VHT\n");
282	return IEEE80211_CONN_MODE_HT;
283	}
284	no_vht = true;
285	} else if (sband->band == NL80211_BAND_2GHZ) {
286	no_vht = true;
287	} else if (!ieee80211_chandef_vht_oper(hw: &sdata->local->hw,
288	vht_cap_info,
289	oper: vht_oper, htop: ht_oper,
290	chandef: &vht_chandef)) {
291	sdata_info(sdata,
292	"AP VHT information is invalid, disabling VHT\n");
293	return IEEE80211_CONN_MODE_HT;
294	}
295
296	if (!cfg80211_chandef_compatible(chandef1: chandef, chandef2: &vht_chandef)) {
297	sdata_info(sdata,
298	"AP VHT information doesn't match HT, disabling VHT\n");
299	return IEEE80211_CONN_MODE_HT;
300	}
301
302	*chandef = vht_chandef;
303
304	/ stick to current max mode if we or the AP don't have HE /
305	if (conn->mode < IEEE80211_CONN_MODE_HE \|\|
306	!elems->he_operation \|\| !elems->he_cap) {
307	if (no_vht)
308	return IEEE80211_CONN_MODE_HT;
309	return IEEE80211_CONN_MODE_VHT;
310	}
311
312	/ stick to HE if we or the AP don't have EHT /
313	if (conn->mode < IEEE80211_CONN_MODE_EHT \|\|
314	!eht_oper \|\| !elems->eht_cap)
315	return IEEE80211_CONN_MODE_HE;
316
317	/*
318	* handle the case that the EHT operation indicates that it holds EHT
319	* operation information (in case that the channel width differs from
320	* the channel width reported in HT/VHT/HE).
321	*/
322	if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) {
323	struct cfg80211_chan_def eht_chandef = *chandef;
324
325	ieee80211_chandef_eht_oper(info: (const void *)eht_oper->optional,
326	chandef: &eht_chandef);
327
328	eht_chandef.punctured =
329	ieee80211_eht_oper_dis_subchan_bitmap(eht_oper);
330
331	if (!cfg80211_chandef_valid(chandef: &eht_chandef)) {
332	sdata_info(sdata,
333	"AP EHT information is invalid, disabling EHT\n");
334	return IEEE80211_CONN_MODE_HE;
335	}
336
337	if (!cfg80211_chandef_compatible(chandef1: chandef, chandef2: &eht_chandef)) {
338	sdata_info(sdata,
339	"AP EHT information doesn't match HT/VHT/HE, disabling EHT\n");
340	return IEEE80211_CONN_MODE_HE;
341	}
342
343	*chandef = eht_chandef;
344	}
345
346	return IEEE80211_CONN_MODE_EHT;
347	}
348
349	static bool
350	ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata,
351	struct ieee80211_supported_band *sband,
352	const struct ieee80211_ht_operation *ht_op)
353	{
354	struct ieee80211_sta_ht_cap sta_ht_cap;
355	int i;
356
357	if (sband->band == NL80211_BAND_6GHZ)
358	return true;
359
360	if (!ht_op)
361	return false;
362
363	memcpy(to: &sta_ht_cap, from: &sband->ht_cap, len: sizeof(sta_ht_cap));
364	ieee80211_apply_htcap_overrides(sdata, ht_cap: &sta_ht_cap);
365
366	/*
367	* P802.11REVme/D7.0 - 6.5.4.2.4
368	* ...
369	* If the MLME of an HT STA receives an MLME-JOIN.request primitive
370	* with the SelectedBSS parameter containing a Basic HT-MCS Set field
371	* in the HT Operation parameter that contains any unsupported MCSs,
372	* the MLME response in the resulting MLME-JOIN.confirm primitive shall
373	* contain a ResultCode parameter that is not set to the value SUCCESS.
374	* ...
375	*/
376
377	/ Simply check that all basic rates are in the STA RX mask /
378	for (i = `0`; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
379	if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) !=
380	ht_op->basic_set[i])
381	return false;
382	}
383
384	return true;
385	}
386
387	static bool
388	ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata,
389	int link_id,
390	struct ieee80211_supported_band *sband,
391	const struct ieee80211_vht_operation *vht_op)
392	{
393	struct ieee80211_sta_vht_cap sta_vht_cap;
394	u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map;
395	int nss;
396
397	if (sband->band != NL80211_BAND_5GHZ)
398	return true;
399
400	if (!vht_op)
401	return false;
402
403	memcpy(to: &sta_vht_cap, from: &sband->vht_cap, len: sizeof(sta_vht_cap));
404	ieee80211_apply_vhtcap_overrides(sdata, vht_cap: &sta_vht_cap);
405
406	ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set);
407	sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map);
408	sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map);
409
410	/*
411	* Many APs are incorrectly advertising an all-zero value here,
412	* which really means MCS 0-7 are required for 1-8 streams, but
413	* they don't really mean it that way.
414	* Some other APs are incorrectly advertising 3 spatial streams
415	* with MCS 0-7 are required, but don't really mean it that way
416	* and we'll connect only with HT, rather than even HE.
417	* As a result, unfortunately the VHT basic MCS/NSS set cannot
418	* be used at all, so check it only in strict mode.
419	*/
420	if (!ieee80211_hw_check(&sdata->local->hw, STRICT))
421	return true;
422
423	/*
424	* P802.11REVme/D7.0 - 6.5.4.2.4
425	* ...
426	* If the MLME of a VHT STA receives an MLME-JOIN.request primitive
427	* with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set
428	* field in the VHT Operation parameter that contains any unsupported
429	* <VHT-MCS, NSS> tuple, the MLME response in the resulting
430	* MLME-JOIN.confirm primitive shall contain a ResultCode parameter
431	* that is not set to the value SUCCESS.
432	* ...
433	*/
434	for (nss = `8`; nss > `0`; nss--) {
435	u8 ap_op_val = (ap_min_req_set >> (`2` * (nss - `1`))) & `3`;
436	u8 sta_rx_val;
437	u8 sta_tx_val;
438
439	if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
440	continue;
441
442	sta_rx_val = (sta_rx_mcs_map >> (`2` * (nss - `1`))) & `3`;
443	sta_tx_val = (sta_tx_mcs_map >> (`2` * (nss - `1`))) & `3`;
444
445	if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED \|\|
446	sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED \|\|
447	sta_rx_val < ap_op_val \|\| sta_tx_val < ap_op_val) {
448	link_id_info(sdata, link_id,
449	"Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n",
450	nss, sta_rx_val, sta_tx_val, ap_op_val);
451	return false;
452	}
453	}
454
455	return true;
456	}
457
458	static bool
459	ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
460	int link_id,
461	const struct ieee80211_he_cap_elem *he_cap,
462	const struct ieee80211_he_operation *he_op)
463	{
464	struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
465	u16 mcs_80_map_tx, mcs_80_map_rx;
466	u16 ap_min_req_set;
467	int nss;
468
469	if (!he_cap)
470	return false;
471
472	/ mcs_nss is right after he_cap info /
473	he_mcs_nss_supp = (void *)(he_cap + `1`);
474
475	mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
476	mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80);
477
478	/ P802.11-REVme/D0.3*
479	* 27.1.1 Introduction to the HE PHY
480	* ...
481	* An HE STA shall support the following features:
482	* ...
483	* Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all
484	* supported channel widths for HE SU PPDUs
485	*/
486	if ((mcs_80_map_tx & `0x3`) == IEEE80211_HE_MCS_NOT_SUPPORTED \|\|
487	(mcs_80_map_rx & `0x3`) == IEEE80211_HE_MCS_NOT_SUPPORTED) {
488	link_id_info(sdata, link_id,
489	"Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n",
490	mcs_80_map_tx, mcs_80_map_rx);
491	return false;
492	}
493
494	if (!he_op)
495	return true;
496
497	ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
498
499	/*
500	* Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
501	* zeroes, which is nonsense, and completely inconsistent with itself
502	* (it doesn't have 8 streams). Accept the settings in this case anyway.
503	*/
504	if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set)
505	return true;
506
507	/ make sure the AP is consistent with itself*
508	*
509	* P802.11-REVme/D0.3
510	* 26.17.1 Basic HE BSS operation
511	*
512	* A STA that is operating in an HE BSS shall be able to receive and
513	* transmit at each of the <HE-MCS, NSS> tuple values indicated by the
514	* Basic HE-MCS And NSS Set field of the HE Operation parameter of the
515	* MLME-START.request primitive and shall be able to receive at each of
516	* the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and
517	* NSS Set field in the HE Capabilities parameter of the MLMESTART.request
518	* primitive
519	*/
520	for (nss = `8`; nss > `0`; nss--) {
521	u8 ap_op_val = (ap_min_req_set >> (`2` * (nss - `1`))) & `3`;
522	u8 ap_rx_val;
523	u8 ap_tx_val;
524
525	if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
526	continue;
527
528	ap_rx_val = (mcs_80_map_rx >> (`2` * (nss - `1`))) & `3`;
529	ap_tx_val = (mcs_80_map_tx >> (`2` * (nss - `1`))) & `3`;
530
531	if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED \|\|
532	ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED \|\|
533	ap_rx_val < ap_op_val \|\| ap_tx_val < ap_op_val) {
534	link_id_info(sdata, link_id,
535	"Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n",
536	nss, ap_rx_val, ap_tx_val, ap_op_val);
537	return false;
538	}
539	}
540
541	return true;
542	}
543
544	static bool
545	ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
546	struct ieee80211_supported_band *sband,
547	const struct ieee80211_he_operation *he_op)
548	{
549	const struct ieee80211_sta_he_cap *sta_he_cap =
550	ieee80211_get_he_iftype_cap_vif(sband, vif: &sdata->vif);
551	u16 ap_min_req_set;
552	int i;
553
554	if (!sta_he_cap \|\| !he_op)
555	return false;
556
557	ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
558
559	/*
560	* Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
561	* zeroes, which is nonsense, and completely inconsistent with itself
562	* (it doesn't have 8 streams). Accept the settings in this case anyway.
563	*/
564	if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set)
565	return true;
566
567	/ Need to go over for 80MHz, 160MHz and for 80+80 /
568	for (i = `0`; i < `3`; i++) {
569	const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
570	&sta_he_cap->he_mcs_nss_supp;
571	u16 sta_mcs_map_rx =
572	le16_to_cpu(((__le16 )sta_mcs_nss_supp)[`2` i]);
573	u16 sta_mcs_map_tx =
574	le16_to_cpu(((__le16 )sta_mcs_nss_supp)[`2` i + `1`]);
575	u8 nss;
576	bool verified = true;
577
578	/*
579	* For each band there is a maximum of 8 spatial streams
580	* possible. Each of the sta_mcs_map_* is a 16-bit struct built
581	* of 2 bits per NSS (1-8), with the values defined in enum
582	* ieee80211_he_mcs_support. Need to make sure STA TX and RX
583	* capabilities aren't less than the AP's minimum requirements
584	* for this HE BSS per SS.
585	* It is enough to find one such band that meets the reqs.
586	*/
587	for (nss = `8`; nss > `0`; nss--) {
588	u8 sta_rx_val = (sta_mcs_map_rx >> (`2` * (nss - `1`))) & `3`;
589	u8 sta_tx_val = (sta_mcs_map_tx >> (`2` * (nss - `1`))) & `3`;
590	u8 ap_val = (ap_min_req_set >> (`2` * (nss - `1`))) & `3`;
591
592	if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
593	continue;
594
595	/*
596	* Make sure the HE AP doesn't require MCSs that aren't
597	* supported by the client as required by spec
598	*
599	* P802.11-REVme/D0.3
600	* 26.17.1 Basic HE BSS operation
601	*
602	* An HE STA shall not attempt to join * (MLME-JOIN.request primitive)
603	* a BSS, unless it supports (i.e., is able to both transmit and
604	* receive using) all of the <HE-MCS, NSS> tuples in the basic
605	* HE-MCS and NSS set.
606	*/
607	if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED \|\|
608	sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED \|\|
609	(ap_val > sta_rx_val) \|\| (ap_val > sta_tx_val)) {
610	verified = false;
611	break;
612	}
613	}
614
615	if (verified)
616	return true;
617	}
618
619	/ If here, STA doesn't meet AP's HE min requirements /
620	return false;
621	}
622
623	static u8
624	ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap,
625	const struct ieee80211_sta_eht_cap *sta_eht_cap,
626	unsigned int idx, int bw)
627	{
628	u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[`0`];
629	u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[`0`];
630
631	/ handle us being a 20 MHz-only EHT STA - with four values*
632	* for MCS 0-7, 8-9, 10-11, 12-13.
633	*/
634	if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL))
635	return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx];
636
637	/ the others have MCS 0-9 together, rather than separately from 0-7 /
638	if (idx > `0`)
639	idx--;
640
641	switch (bw) {
642	case `0`:
643	return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx];
644	case `1`:
645	if (!(he_phy_cap0 &
646	(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G \|
647	IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G)))
648	return `0xff`; / pass check /
649	return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx];
650	case `2`:
651	if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ))
652	return `0xff`; / pass check /
653	return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx];
654	}
655
656	WARN_ON(`1`);
657	return `0`;
658	}
659
660	static bool
661	ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata,
662	struct ieee80211_supported_band *sband,
663	const struct ieee80211_eht_operation *eht_op)
664	{
665	const struct ieee80211_sta_he_cap *sta_he_cap =
666	ieee80211_get_he_iftype_cap_vif(sband, vif: &sdata->vif);
667	const struct ieee80211_sta_eht_cap *sta_eht_cap =
668	ieee80211_get_eht_iftype_cap_vif(sband, vif: &sdata->vif);
669	const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req;
670	unsigned int i;
671
672	if (!sta_he_cap \|\| !sta_eht_cap \|\| !eht_op)
673	return false;
674
675	req = &eht_op->basic_mcs_nss;
676
677	for (i = `0`; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) {
678	u8 req_rx_nss, req_tx_nss;
679	unsigned int bw;
680
681	req_rx_nss = u8_get_bits(v: req->rx_tx_max_nss[i],
682	IEEE80211_EHT_MCS_NSS_RX);
683	req_tx_nss = u8_get_bits(v: req->rx_tx_max_nss[i],
684	IEEE80211_EHT_MCS_NSS_TX);
685
686	for (bw = `0`; bw < `3`; bw++) {
687	u8 have, have_rx_nss, have_tx_nss;
688
689	have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap,
690	sta_eht_cap,
691	idx: i, bw);
692	have_rx_nss = u8_get_bits(v: have,
693	IEEE80211_EHT_MCS_NSS_RX);
694	have_tx_nss = u8_get_bits(v: have,
695	IEEE80211_EHT_MCS_NSS_TX);
696
697	if (req_rx_nss > have_rx_nss \|\|
698	req_tx_nss > have_tx_nss)
699	return false;
700	}
701	}
702
703	return true;
704	}
705
706	static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
707	const u8 *supp_rates,
708	unsigned int supp_rates_len,
709	const u8 *ext_supp_rates,
710	unsigned int ext_supp_rates_len,
711	u32 rates, u32 basic_rates,
712	unsigned long *unknown_rates_selectors,
713	bool *have_higher_than_11mbit,
714	int min_rate, int* *min_rate_index)
715	{
716	int i, j;
717
718	for (i = `0`; i < supp_rates_len + ext_supp_rates_len; i++) {
719	u8 supp_rate = i < supp_rates_len ?
720	supp_rates[i] :
721	ext_supp_rates[i - supp_rates_len];
722	int rate = supp_rate & `0x7f`;
723	bool is_basic = !!(supp_rate & `0x80`);
724
725	if ((rate * `5`) > `110` && have_higher_than_11mbit)
726	*have_higher_than_11mbit = true;
727
728	/*
729	* Skip membership selectors since they're not rates.
730	*
731	* Note: Even though the membership selector and the basic
732	* rate flag share the same bit, they are not exactly
733	* the same.
734	*/
735	if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) {
736	if (unknown_rates_selectors)
737	set_bit(nr: rate, addr: unknown_rates_selectors);
738	continue;
739	}
740
741	for (j = `0`; j < sband->n_bitrates; j++) {
742	struct ieee80211_rate *br;
743	int brate;
744
745	br = &sband->bitrates[j];
746
747	brate = DIV_ROUND_UP(br->bitrate, `5`);
748	if (brate == rate) {
749	if (rates)
750	*rates \|= BIT(j);
751	if (is_basic && basic_rates)
752	*basic_rates \|= BIT(j);
753	if (min_rate && (rate * `5`) < *min_rate) {
754	min_rate = rate `5`;
755	if (min_rate_index)
756	*min_rate_index = j;
757	}
758	break;
759	}
760	}
761
762	/ Handle an unknown entry as if it is an unknown selector /
763	if (is_basic && unknown_rates_selectors && j == sband->n_bitrates)
764	set_bit(nr: rate, addr: unknown_rates_selectors);
765	}
766	}
767
768	static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata,
769	const struct cfg80211_chan_def *chandef,
770	u32 prohibited_flags)
771	{
772	if (!cfg80211_chandef_usable(wiphy: sdata->local->hw.wiphy,
773	chandef, prohibited_flags))
774	return false;
775
776	if (chandef->punctured &&
777	ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING))
778	return false;
779
780	return true;
781	}
782
783	static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c)
784	{
785	if (c->width == NL80211_CHAN_WIDTH_80P80)
786	return `4` + `4`;
787
788	return cfg80211_chandef_get_width(c) / `20`;
789	}
790
791	static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c)
792	{
793	switch (c->width) {
794	case NL80211_CHAN_WIDTH_20:
795	case NL80211_CHAN_WIDTH_20_NOHT:
796	return `1`;
797	case NL80211_CHAN_WIDTH_40:
798	return `2`;
799	case NL80211_CHAN_WIDTH_80P80:
800	case NL80211_CHAN_WIDTH_80:
801	return `3`;
802	case NL80211_CHAN_WIDTH_160:
803	return `4`;
804	case NL80211_CHAN_WIDTH_320:
805	return `5`;
806	default:
807	WARN_ON(`1`);
808	return `0`;
809	}
810	}
811
812	VISIBLE_IF_MAC80211_KUNIT int
813	ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap,
814	u8 n_partial_subchans)
815	{
816	int n = ieee80211_chandef_num_subchans(c: ap);
817	struct cfg80211_chan_def tmp = *ap;
818	int offset = `0`;
819
820	/*
821	* Given a chandef (in this context, it's the AP's) and a number
822	* of subchannels that we want to look at ('n_partial_subchans'),
823	* calculate the offset in number of subchannels between the full
824	* and the subset with the desired width.
825	*/
826
827	/ same number of subchannels means no offset, obviously /
828	if (n == n_partial_subchans)
829	return `0`;
830
831	/ don't WARN - misconfigured APs could cause this if their N > width /
832	if (n < n_partial_subchans)
833	return `0`;
834
835	while (ieee80211_chandef_num_subchans(c: &tmp) > n_partial_subchans) {
836	u32 prev = tmp.center_freq1;
837
838	ieee80211_chandef_downgrade(chandef: &tmp, NULL);
839
840	/*
841	* if center_freq moved up, half the original channels
842	* are gone now but were below, so increase offset
843	*/
844	if (prev < tmp.center_freq1)
845	offset += ieee80211_chandef_num_subchans(c: &tmp);
846	}
847
848	/*
849	* 80+80 with secondary 80 below primary - four subchannels for it
850	* (we cannot downgrade to 80+80, so no need to consider 'tmp')
851	*/
852	if (ap->width == NL80211_CHAN_WIDTH_80P80 &&
853	ap->center_freq2 < ap->center_freq1)
854	offset += `4`;
855
856	return offset;
857	}
858	EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset);
859
860	VISIBLE_IF_MAC80211_KUNIT void
861	ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd,
862	const struct cfg80211_chan_def *ap,
863	const struct cfg80211_chan_def *used)
864	{
865	u8 needed = ieee80211_chandef_num_subchans(c: used);
866	u8 have = ieee80211_chandef_num_subchans(c: ap);
867	u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ];
868	u8 offset;
869
870	if (!psd->valid)
871	return;
872
873	/ if N is zero, all defaults were used, no point in rearranging /
874	if (!psd->n)
875	goto out;
876
877	BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power));
878
879	/*
880	* This assumes that 'N' is consistent with the HE channel, as
881	* it should be (otherwise the AP is broken).
882	*
883	* In psd->power we have values in the order 0..N, 0..K, where
884	* N+K should cover the entire channel per 'ap', but even if it
885	* doesn't then we've pre-filled 'unlimited' as defaults.
886	*
887	* But this is all the wrong order, we want to have them in the
888	* order of the 'used' channel.
889	*
890	* So for example, we could have a 320 MHz EHT AP, which has the
891	* HE channel as 80 MHz (e.g. due to puncturing, which doesn't
892	* seem to be considered for the TPE), as follows:
893	*
894	* EHT 320: \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|
895	* HE 80: \| \| \| \| \|
896	* used 160: \| \| \| \| \| \| \| \| \|
897	*
898	* N entries: \|--\|--\|--\|--\|
899	* K entries: \|--\|--\|--\|--\|--\|--\|--\|--\| \|--\|--\|--\|--\|
900	* power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15
901	* full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
902	* used chan: 0 1 2 3 4 5 6 7
903	*
904	* The idx in the power array ('power idx') is like this since it
905	* comes directly from the element's N and K entries in their
906	* element order, and those are this way for HE compatibility.
907	*
908	* Rearrange them as desired here, first by putting them into the
909	* 'full chan' order, and then selecting the necessary subset for
910	* the 'used chan'.
911	*/
912
913	/ first reorder according to AP channel /
914	offset = ieee80211_calc_chandef_subchan_offset(ap, n_partial_subchans: psd->n);
915	for (int i = `0`; i < have; i++) {
916	if (i < offset)
917	tmp[i] = psd->power[i + psd->n];
918	else if (i < offset + psd->n)
919	tmp[i] = psd->power[i - offset];
920	else
921	tmp[i] = psd->power[i];
922	}
923
924	/*
925	* and then select the subset for the used channel
926	* (set everything to defaults first in case a driver is confused)
927	*/
928	memset(s: psd->power, IEEE80211_TPE_PSD_NO_LIMIT, n: sizeof(psd->power));
929	offset = ieee80211_calc_chandef_subchan_offset(ap, n_partial_subchans: needed);
930	for (int i = `0`; i < needed; i++)
931	psd->power[i] = tmp[offset + i];
932
933	out:
934	/ limit, but don't lie if there are defaults in the data /
935	if (needed < psd->count)
936	psd->count = needed;
937	}
938	EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd);
939
940	static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe,
941	const struct cfg80211_chan_def *ap,
942	const struct cfg80211_chan_def *used)
943	{
944	/ ignore this completely for narrow/invalid channels /
945	if (!ieee80211_chandef_num_subchans(c: ap) \|\|
946	!ieee80211_chandef_num_subchans(c: used)) {
947	ieee80211_clear_tpe(tpe);
948	return;
949	}
950
951	for (int i = `0`; i < `2`; i++) {
952	int needed_pwr_count;
953
954	ieee80211_rearrange_tpe_psd(psd: &tpe->psd_local[i], ap, used);
955	ieee80211_rearrange_tpe_psd(psd: &tpe->psd_reg_client[i], ap, used);
956
957	/ limit this to the widths we actually need /
958	needed_pwr_count = ieee80211_chandef_num_widths(c: used);
959	if (needed_pwr_count < tpe->max_local[i].count)
960	tpe->max_local[i].count = needed_pwr_count;
961	if (needed_pwr_count < tpe->max_reg_client[i].count)
962	tpe->max_reg_client[i].count = needed_pwr_count;
963	}
964	}
965
966	/*
967	* The AP part of the channel request is used to distinguish settings
968	* to the device used for wider bandwidth OFDMA. This is used in the
969	* channel context code to assign two channel contexts even if they're
970	* both for the same channel, if the AP bandwidths are incompatible.
971	* If not EHT (or driver override) then ap.chan == NULL indicates that
972	* there's no wider BW OFDMA used.
973	*/
974	static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata,
975	struct ieee80211_chan_req *chanreq,
976	struct ieee80211_conn_settings *conn,
977	struct cfg80211_chan_def *ap_chandef)
978	{
979	chanreq->ap.chan = NULL;
980
981	if (conn->mode < IEEE80211_CONN_MODE_EHT)
982	return;
983	if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW)
984	return;
985
986	chanreq->ap = *ap_chandef;
987	}
988
989	VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems *
990	ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata,
991	struct ieee80211_conn_settings *conn,
992	struct cfg80211_bss cbss, int* link_id,
993	struct ieee80211_chan_req *chanreq,
994	struct cfg80211_chan_def *ap_chandef,
995	unsigned long *userspace_selectors)
996	{
997	const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies);
998	struct ieee80211_bss bss = (void* *)cbss->priv;
999	struct ieee80211_channel *channel = cbss->channel;
1000	struct ieee80211_elems_parse_params parse_params = {
1001	.link_id = -`1`,
1002	.from_ap = true,
1003	.start = ies->data,
1004	.len = ies->len,
1005	};
1006	struct ieee802_11_elems *elems;
1007	struct ieee80211_supported_band *sband;
1008	enum ieee80211_conn_mode ap_mode;
1009	unsigned long unknown_rates_selectors[BITS_TO_LONGS(`128`)] = {};
1010	unsigned long sta_selectors[BITS_TO_LONGS(`128`)] = {};
1011	int ret;
1012
1013	again:
1014	parse_params.mode = conn->mode;
1015	elems = ieee802_11_parse_elems_full(params: &parse_params);
1016	if (!elems)
1017	return ERR_PTR(error: -ENOMEM);
1018
1019	ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info: bss->vht_cap_info,
1020	elems, ignore_ht_channel_mismatch: false, conn, chandef: ap_chandef);
1021
1022	/ this should be impossible since parsing depends on our mode /
1023	if (WARN_ON(ap_mode > conn->mode)) {
1024	ret = -EINVAL;
1025	goto free;
1026	}
1027
1028	if (conn->mode != ap_mode) {
1029	conn->mode = ap_mode;
1030	kfree(objp: elems);
1031	goto again;
1032	}
1033
1034	mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n",
1035	cbss->bssid, ieee80211_conn_mode_str(ap_mode));
1036
1037	sband = sdata->local->hw.wiphy->bands[channel->band];
1038
1039	ieee80211_get_rates(sband, supp_rates: elems->supp_rates, supp_rates_len: elems->supp_rates_len,
1040	ext_supp_rates: elems->ext_supp_rates, ext_supp_rates_len: elems->ext_supp_rates_len,
1041	NULL, NULL, unknown_rates_selectors, NULL, NULL,
1042	NULL);
1043
1044	switch (channel->band) {
1045	case NL80211_BAND_S1GHZ:
1046	if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) {
1047	ret = -EINVAL;
1048	goto free;
1049	}
1050
1051	chanreq->oper = *ap_chandef;
1052	if (!cfg80211_chandef_usable(wiphy: sdata->wdev.wiphy, chandef: &chanreq->oper,
1053	prohibited_flags: IEEE80211_CHAN_DISABLED)) {
1054	ret = -EINVAL;
1055	goto free;
1056	}
1057
1058	return elems;
1059	case NL80211_BAND_6GHZ:
1060	if (ap_mode < IEEE80211_CONN_MODE_HE) {
1061	link_id_info(sdata, link_id,
1062	"Rejecting non-HE 6/7 GHz connection");
1063	ret = -EINVAL;
1064	goto free;
1065	}
1066	break;
1067	default:
1068	if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) {
1069	ret = -EINVAL;
1070	goto free;
1071	}
1072	}
1073
1074	switch (ap_mode) {
1075	case IEEE80211_CONN_MODE_S1G:
1076	WARN_ON(`1`);
1077	ret = -EINVAL;
1078	goto free;
1079	case IEEE80211_CONN_MODE_LEGACY:
1080	conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
1081	break;
1082	case IEEE80211_CONN_MODE_HT:
1083	conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
1084	conn->bw_limit,
1085	IEEE80211_CONN_BW_LIMIT_40);
1086	break;
1087	case IEEE80211_CONN_MODE_VHT:
1088	case IEEE80211_CONN_MODE_HE:
1089	conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
1090	conn->bw_limit,
1091	IEEE80211_CONN_BW_LIMIT_160);
1092	break;
1093	case IEEE80211_CONN_MODE_EHT:
1094	conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
1095	conn->bw_limit,
1096	IEEE80211_CONN_BW_LIMIT_320);
1097	break;
1098	}
1099
1100	chanreq->oper = *ap_chandef;
1101
1102	bitmap_copy(dst: sta_selectors, src: userspace_selectors, nbits: `128`);
1103	if (conn->mode >= IEEE80211_CONN_MODE_HT)
1104	set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, addr: sta_selectors);
1105	if (conn->mode >= IEEE80211_CONN_MODE_VHT)
1106	set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, addr: sta_selectors);
1107	if (conn->mode >= IEEE80211_CONN_MODE_HE)
1108	set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, addr: sta_selectors);
1109	if (conn->mode >= IEEE80211_CONN_MODE_EHT)
1110	set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, addr: sta_selectors);
1111
1112	/*
1113	* We do not support EPD or GLK so never add them.
1114	* SAE_H2E is handled through userspace_selectors.
1115	*/
1116
1117	/ Check if we support all required features /
1118	if (!bitmap_subset(src1: unknown_rates_selectors, src2: sta_selectors, nbits: `128`)) {
1119	link_id_info(sdata, link_id,
1120	"required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n");
1121	ret = -EINVAL;
1122	goto free;
1123	}
1124
1125	ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef);
1126
1127	while (!ieee80211_chandef_usable(sdata, chandef: &chanreq->oper,
1128	prohibited_flags: IEEE80211_CHAN_DISABLED)) {
1129	if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) {
1130	ret = -EINVAL;
1131	goto free;
1132	}
1133
1134	ieee80211_chanreq_downgrade(chanreq, conn);
1135	}
1136
1137	if (conn->mode >= IEEE80211_CONN_MODE_HE &&
1138	!cfg80211_chandef_usable(wiphy: sdata->wdev.wiphy, chandef: &chanreq->oper,
1139	prohibited_flags: IEEE80211_CHAN_NO_HE)) {
1140	conn->mode = IEEE80211_CONN_MODE_VHT;
1141	conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
1142	conn->bw_limit,
1143	IEEE80211_CONN_BW_LIMIT_160);
1144	}
1145
1146	if (conn->mode >= IEEE80211_CONN_MODE_EHT &&
1147	!cfg80211_chandef_usable(wiphy: sdata->wdev.wiphy, chandef: &chanreq->oper,
1148	prohibited_flags: IEEE80211_CHAN_NO_EHT)) {
1149	conn->mode = IEEE80211_CONN_MODE_HE;
1150	conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
1151	conn->bw_limit,
1152	IEEE80211_CONN_BW_LIMIT_160);
1153	}
1154
1155	if (chanreq->oper.width != ap_chandef->width \|\| ap_mode != conn->mode)
1156	link_id_info(sdata, link_id,
1157	"regulatory prevented using AP config, downgraded\n");
1158
1159	if (conn->mode >= IEEE80211_CONN_MODE_HT &&
1160	!ieee80211_verify_sta_ht_mcs_support(sdata, sband,
1161	ht_op: elems->ht_operation)) {
1162	conn->mode = IEEE80211_CONN_MODE_LEGACY;
1163	conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
1164	link_id_info(sdata, link_id,
1165	"required MCSes not supported, disabling HT\n");
1166	}
1167
1168	if (conn->mode >= IEEE80211_CONN_MODE_VHT &&
1169	!ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband,
1170	vht_op: elems->vht_operation)) {
1171	conn->mode = IEEE80211_CONN_MODE_HT;
1172	conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
1173	conn->bw_limit,
1174	IEEE80211_CONN_BW_LIMIT_40);
1175	link_id_info(sdata, link_id,
1176	"required MCSes not supported, disabling VHT\n");
1177	}
1178
1179	if (conn->mode >= IEEE80211_CONN_MODE_HE &&
1180	(!ieee80211_verify_peer_he_mcs_support(sdata, link_id,
1181	he_cap: (void *)elems->he_cap,
1182	he_op: elems->he_operation) \|\|
1183	!ieee80211_verify_sta_he_mcs_support(sdata, sband,
1184	he_op: elems->he_operation))) {
1185	conn->mode = IEEE80211_CONN_MODE_VHT;
1186	link_id_info(sdata, link_id,
1187	"required MCSes not supported, disabling HE\n");
1188	}
1189
1190	if (conn->mode >= IEEE80211_CONN_MODE_EHT &&
1191	!ieee80211_verify_sta_eht_mcs_support(sdata, sband,
1192	eht_op: elems->eht_operation)) {
1193	conn->mode = IEEE80211_CONN_MODE_HE;
1194	conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
1195	conn->bw_limit,
1196	IEEE80211_CONN_BW_LIMIT_160);
1197	link_id_info(sdata, link_id,
1198	"required MCSes not supported, disabling EHT\n");
1199	}
1200
1201	if (conn->mode >= IEEE80211_CONN_MODE_EHT &&
1202	channel->band != NL80211_BAND_2GHZ &&
1203	conn->bw_limit == IEEE80211_CONN_BW_LIMIT_40) {
1204	conn->mode = IEEE80211_CONN_MODE_HE;
1205	link_id_info(sdata, link_id,
1206	"required bandwidth not supported, disabling EHT\n");
1207	}
1208
1209	/ the mode can only decrease, so this must terminate /
1210	if (ap_mode != conn->mode) {
1211	kfree(objp: elems);
1212	goto again;
1213	}
1214
1215	mlme_link_id_dbg(sdata, link_id,
1216	"connecting with %s mode, max bandwidth %d MHz\n",
1217	ieee80211_conn_mode_str(conn->mode),
1218	`20` * (`1` << conn->bw_limit));
1219
1220	if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) {
1221	ret = -EINVAL;
1222	goto free;
1223	}
1224
1225	return elems;
1226	free:
1227	kfree(objp: elems);
1228	return ERR_PTR(error: ret);
1229	}
1230	EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode);
1231
1232	static int ieee80211_config_bw(struct ieee80211_link_data *link,
1233	struct ieee802_11_elems *elems,
1234	bool update, u64 *changed, u16 stype)
1235	{
1236	struct ieee80211_channel *channel = link->conf->chanreq.oper.chan;
1237	struct ieee80211_sub_if_data *sdata = link->sdata;
1238	struct ieee80211_chan_req chanreq = {};
1239	struct cfg80211_chan_def ap_chandef;
1240	enum ieee80211_conn_mode ap_mode;
1241	const char *frame;
1242	u32 vht_cap_info = `0`;
1243	u16 ht_opmode;
1244	int ret;
1245
1246	switch (stype) {
1247	case IEEE80211_STYPE_BEACON:
1248	frame = "beacon";
1249	break;
1250	case IEEE80211_STYPE_ASSOC_RESP:
1251	frame = "assoc response";
1252	break;
1253	case IEEE80211_STYPE_REASSOC_RESP:
1254	frame = "reassoc response";
1255	break;
1256	case IEEE80211_STYPE_ACTION:
1257	/ the only action frame that gets here /
1258	frame = "ML reconf response";
1259	break;
1260	default:
1261	return -EINVAL;
1262	}
1263
1264	/ don't track any bandwidth changes in legacy/S1G modes /
1265	if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY \|\|
1266	link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G)
1267	return `0`;
1268
1269	if (elems->vht_cap_elem)
1270	vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info);
1271
1272	ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info,
1273	elems, ignore_ht_channel_mismatch: true, conn: &link->u.mgd.conn,
1274	chandef: &ap_chandef);
1275
1276	if (ap_mode != link->u.mgd.conn.mode) {
1277	link_info(link,
1278	"AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n",
1279	link->u.mgd.bssid,
1280	ieee80211_conn_mode_str(link->u.mgd.conn.mode),
1281	ieee80211_conn_mode_str(ap_mode), frame);
1282	return -EINVAL;
1283	}
1284
1285	chanreq.oper = ap_chandef;
1286	ieee80211_set_chanreq_ap(sdata, chanreq: &chanreq, conn: &link->u.mgd.conn,
1287	ap_chandef: &ap_chandef);
1288
1289	/*
1290	* if HT operation mode changed store the new one -
1291	* this may be applicable even if channel is identical
1292	*/
1293	if (elems->ht_operation) {
1294	ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode);
1295	if (link->conf->ht_operation_mode != ht_opmode) {
1296	*changed \|= BSS_CHANGED_HT;
1297	link->conf->ht_operation_mode = ht_opmode;
1298	}
1299	}
1300
1301	/*
1302	* Downgrade the new channel if we associated with restricted
1303	* bandwidth capabilities. For example, if we associated as a
1304	* 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities
1305	* or config reasons) then switching to a 40 MHz channel now
1306	* won't do us any good -- we couldn't use it with the AP.
1307	*/
1308	while (link->u.mgd.conn.bw_limit <
1309	ieee80211_min_bw_limit_from_chandef(chandef: &chanreq.oper))
1310	ieee80211_chandef_downgrade(chandef: &chanreq.oper, NULL);
1311
1312	/ TPE element is not present in (re)assoc/ML reconfig response /
1313	if (stype == IEEE80211_STYPE_BEACON &&
1314	ap_chandef.chan->band == NL80211_BAND_6GHZ &&
1315	link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) {
1316	ieee80211_rearrange_tpe(tpe: &elems->tpe, ap: &ap_chandef,
1317	used: &chanreq.oper);
1318	if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) {
1319	link->conf->tpe = elems->tpe;
1320	*changed \|= BSS_CHANGED_TPE;
1321	}
1322	}
1323
1324	if (ieee80211_chanreq_identical(a: &chanreq, b: &link->conf->chanreq))
1325	return `0`;
1326
1327	link_info(link,
1328	"AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n",
1329	link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq,
1330	chanreq.oper.chan->freq_offset, chanreq.oper.width,
1331	chanreq.oper.center_freq1, chanreq.oper.freq1_offset,
1332	chanreq.oper.center_freq2);
1333
1334	if (!cfg80211_chandef_valid(chandef: &chanreq.oper)) {
1335	sdata_info(sdata,
1336	"AP %pM changed caps/bw in %s in a way we can't support - disconnect\n",
1337	link->u.mgd.bssid, frame);
1338	return -EINVAL;
1339	}
1340
1341	if (!update) {
1342	link->conf->chanreq = chanreq;
1343	return `0`;
1344	}
1345
1346	/*
1347	* We're tracking the current AP here, so don't do any further checks
1348	* here. This keeps us from playing ping-pong with regulatory, without
1349	* it the following can happen (for example):
1350	* - connect to an AP with 80 MHz, world regdom allows 80 MHz
1351	* - AP advertises regdom US
1352	* - CRDA loads regdom US with 80 MHz prohibited (old database)
1353	* - we detect an unsupported channel and disconnect
1354	* - disconnect causes CRDA to reload world regdomain and the game
1355	* starts anew.
1356	* (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
1357	*
1358	* It seems possible that there are still scenarios with CSA or real
1359	* bandwidth changes where a this could happen, but those cases are
1360	* less common and wouldn't completely prevent using the AP.
1361	*/
1362
1363	ret = ieee80211_link_change_chanreq(link, req: &chanreq, changed);
1364	if (ret) {
1365	sdata_info(sdata,
1366	"AP %pM changed bandwidth in %s to incompatible one - disconnect\n",
1367	link->u.mgd.bssid, frame);
1368	return ret;
1369	}
1370
1371	cfg80211_schedule_channels_check(wdev: &sdata->wdev);
1372	return `0`;
1373	}
1374
1375	/ frame sending functions /
1376
1377	static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
1378	struct sk_buff *skb, u8 ap_ht_param,
1379	struct ieee80211_supported_band *sband,
1380	struct ieee80211_channel *channel,
1381	enum ieee80211_smps_mode smps,
1382	const struct ieee80211_conn_settings *conn)
1383	{
1384	u8 *pos;
1385	u32 flags = channel->flags;
1386	u16 cap;
1387	struct ieee80211_sta_ht_cap ht_cap;
1388
1389	BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
1390
1391	memcpy(to: &ht_cap, from: &sband->ht_cap, len: sizeof(ht_cap));
1392	ieee80211_apply_htcap_overrides(sdata, ht_cap: &ht_cap);
1393
1394	/ determine capability flags /
1395	cap = ht_cap.cap;
1396
1397	switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1398	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1399	if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
1400	cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1401	cap &= ~IEEE80211_HT_CAP_SGI_40;
1402	}
1403	break;
1404	case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1405	if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
1406	cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1407	cap &= ~IEEE80211_HT_CAP_SGI_40;
1408	}
1409	break;
1410	}
1411
1412	/*
1413	* If 40 MHz was disabled associate as though we weren't
1414	* capable of 40 MHz -- some broken APs will never fall
1415	* back to trying to transmit in 20 MHz.
1416	*/
1417	if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) {
1418	cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1419	cap &= ~IEEE80211_HT_CAP_SGI_40;
1420	}
1421
1422	/ set SM PS mode properly /
1423	cap &= ~IEEE80211_HT_CAP_SM_PS;
1424	switch (smps) {
1425	case IEEE80211_SMPS_AUTOMATIC:
1426	case IEEE80211_SMPS_NUM_MODES:
1427	WARN_ON(`1`);
1428	fallthrough;
1429	case IEEE80211_SMPS_OFF:
1430	cap \|= WLAN_HT_CAP_SM_PS_DISABLED <<
1431	IEEE80211_HT_CAP_SM_PS_SHIFT;
1432	break;
1433	case IEEE80211_SMPS_STATIC:
1434	cap \|= WLAN_HT_CAP_SM_PS_STATIC <<
1435	IEEE80211_HT_CAP_SM_PS_SHIFT;
1436	break;
1437	case IEEE80211_SMPS_DYNAMIC:
1438	cap \|= WLAN_HT_CAP_SM_PS_DYNAMIC <<
1439	IEEE80211_HT_CAP_SM_PS_SHIFT;
1440	break;
1441	}
1442
1443	/ reserve and fill IE /
1444	pos = skb_put(skb, len: sizeof(struct ieee80211_ht_cap) + `2`);
1445	ieee80211_ie_build_ht_cap(pos, ht_cap: &ht_cap, cap);
1446	}
1447
1448	/ This function determines vht capability flags for the association*
1449	* and builds the IE.
1450	* Note - the function returns true to own the MU-MIMO capability
1451	*/
1452	static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
1453	struct sk_buff *skb,
1454	struct ieee80211_supported_band *sband,
1455	struct ieee80211_vht_cap *ap_vht_cap,
1456	const struct ieee80211_conn_settings *conn)
1457	{
1458	struct ieee80211_local *local = sdata->local;
1459	u8 *pos;
1460	u32 cap;
1461	struct ieee80211_sta_vht_cap vht_cap;
1462	u32 mask, ap_bf_sts, our_bf_sts;
1463	bool mu_mimo_owner = false;
1464
1465	BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
1466
1467	memcpy(to: &vht_cap, from: &sband->vht_cap, len: sizeof(vht_cap));
1468	ieee80211_apply_vhtcap_overrides(sdata, vht_cap: &vht_cap);
1469
1470	/ determine capability flags /
1471	cap = vht_cap.cap;
1472
1473	if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) {
1474	cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
1475	cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
1476	}
1477
1478	/*
1479	* Some APs apparently get confused if our capabilities are better
1480	* than theirs, so restrict what we advertise in the assoc request.
1481	*/
1482	if (!ieee80211_hw_check(&local->hw, STRICT)) {
1483	if (!(ap_vht_cap->vht_cap_info &
1484	cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
1485	cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE \|
1486	IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
1487	else if (!(ap_vht_cap->vht_cap_info &
1488	cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
1489	cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
1490	}
1491
1492	/*
1493	* If some other vif is using the MU-MIMO capability we cannot associate
1494	* using MU-MIMO - this will lead to contradictions in the group-id
1495	* mechanism.
1496	* Ownership is defined since association request, in order to avoid
1497	* simultaneous associations with MU-MIMO.
1498	*/
1499	if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
1500	bool disable_mu_mimo = false;
1501	struct ieee80211_sub_if_data *other;
1502
1503	list_for_each_entry(other, &local->interfaces, list) {
1504	if (other->vif.bss_conf.mu_mimo_owner) {
1505	disable_mu_mimo = true;
1506	break;
1507	}
1508	}
1509	if (disable_mu_mimo)
1510	cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
1511	else
1512	mu_mimo_owner = true;
1513	}
1514
1515	mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
1516
1517	ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
1518	our_bf_sts = cap & mask;
1519
1520	if (ap_bf_sts < our_bf_sts) {
1521	cap &= ~mask;
1522	cap \|= ap_bf_sts;
1523	}
1524
1525	/ reserve and fill IE /
1526	pos = skb_put(skb, len: sizeof(struct ieee80211_vht_cap) + `2`);
1527	ieee80211_ie_build_vht_cap(pos, vht_cap: &vht_cap, cap);
1528
1529	return mu_mimo_owner;
1530	}
1531
1532	static void ieee80211_assoc_add_rates(struct ieee80211_local *local,
1533	struct sk_buff *skb,
1534	enum nl80211_chan_width width,
1535	struct ieee80211_supported_band *sband,
1536	struct ieee80211_mgd_assoc_data *assoc_data)
1537	{
1538	u32 rates;
1539
1540	if (assoc_data->supp_rates_len &&
1541	!ieee80211_hw_check(&local->hw, STRICT)) {
1542	/*
1543	* Get all rates supported by the device and the AP as
1544	* some APs don't like getting a superset of their rates
1545	* in the association request (e.g. D-Link DAP 1353 in
1546	* b-only mode)...
1547	*/
1548	ieee80211_parse_bitrates(width, sband,
1549	srates: assoc_data->supp_rates,
1550	srates_len: assoc_data->supp_rates_len,
1551	rates: &rates);
1552	} else {
1553	/*
1554	* In case AP not provide any supported rates information
1555	* before association, we send information element(s) with
1556	* all rates that we support.
1557	*/
1558	rates = ~`0`;
1559	}
1560
1561	ieee80211_put_srates_elem(skb, sband, basic_rates: `0`, masked_rates: ~rates,
1562	element_id: WLAN_EID_SUPP_RATES);
1563	ieee80211_put_srates_elem(skb, sband, basic_rates: `0`, masked_rates: ~rates,
1564	element_id: WLAN_EID_EXT_SUPP_RATES);
1565	}
1566
1567	static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb,
1568	const u8 *elems,
1569	size_t elems_len,
1570	size_t offset)
1571	{
1572	size_t noffset;
1573
1574	static const u8 before_ht[] = {
1575	WLAN_EID_SSID,
1576	WLAN_EID_SUPP_RATES,
1577	WLAN_EID_EXT_SUPP_RATES,
1578	WLAN_EID_PWR_CAPABILITY,
1579	WLAN_EID_SUPPORTED_CHANNELS,
1580	WLAN_EID_RSN,
1581	WLAN_EID_QOS_CAPA,
1582	WLAN_EID_RRM_ENABLED_CAPABILITIES,
1583	WLAN_EID_MOBILITY_DOMAIN,
1584	WLAN_EID_FAST_BSS_TRANSITION, / reassoc only /
1585	WLAN_EID_RIC_DATA, / reassoc only /
1586	WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1587	};
1588	static const u8 after_ric[] = {
1589	WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1590	WLAN_EID_HT_CAPABILITY,
1591	WLAN_EID_BSS_COEX_2040,
1592	/ luckily this is almost always there /
1593	WLAN_EID_EXT_CAPABILITY,
1594	WLAN_EID_QOS_TRAFFIC_CAPA,
1595	WLAN_EID_TIM_BCAST_REQ,
1596	WLAN_EID_INTERWORKING,
1597	/ 60 GHz (Multi-band, DMG, MMS) can't happen /
1598	WLAN_EID_VHT_CAPABILITY,
1599	WLAN_EID_OPMODE_NOTIF,
1600	};
1601
1602	if (!elems_len)
1603	return offset;
1604
1605	noffset = ieee80211_ie_split_ric(ies: elems, ielen: elems_len,
1606	ids: before_ht,
1607	ARRAY_SIZE(before_ht),
1608	after_ric,
1609	ARRAY_SIZE(after_ric),
1610	offset);
1611	skb_put_data(skb, data: elems + offset, len: noffset - offset);
1612
1613	return noffset;
1614	}
1615
1616	static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb,
1617	const u8 *elems,
1618	size_t elems_len,
1619	size_t offset)
1620	{
1621	static const u8 before_vht[] = {
1622	/*
1623	* no need to list the ones split off before HT
1624	* or generated here
1625	*/
1626	WLAN_EID_BSS_COEX_2040,
1627	WLAN_EID_EXT_CAPABILITY,
1628	WLAN_EID_QOS_TRAFFIC_CAPA,
1629	WLAN_EID_TIM_BCAST_REQ,
1630	WLAN_EID_INTERWORKING,
1631	/ 60 GHz (Multi-band, DMG, MMS) can't happen /
1632	};
1633	size_t noffset;
1634
1635	if (!elems_len)
1636	return offset;
1637
1638	/ RIC already taken care of in ieee80211_add_before_ht_elems() /
1639	noffset = ieee80211_ie_split(ies: elems, ielen: elems_len,
1640	ids: before_vht, ARRAY_SIZE(before_vht),
1641	offset);
1642	skb_put_data(skb, data: elems + offset, len: noffset - offset);
1643
1644	return noffset;
1645	}
1646
1647	static size_t ieee80211_add_before_he_elems(struct sk_buff *skb,
1648	const u8 *elems,
1649	size_t elems_len,
1650	size_t offset)
1651	{
1652	static const u8 before_he[] = {
1653	/*
1654	* no need to list the ones split off before VHT
1655	* or generated here
1656	*/
1657	WLAN_EID_OPMODE_NOTIF,
1658	WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
1659	/ 11ai elements /
1660	WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
1661	WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
1662	WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
1663	WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
1664	WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
1665	/ TODO: add 11ah/11aj/11ak elements /
1666	};
1667	size_t noffset;
1668
1669	if (!elems_len)
1670	return offset;
1671
1672	/ RIC already taken care of in ieee80211_add_before_ht_elems() /
1673	noffset = ieee80211_ie_split(ies: elems, ielen: elems_len,
1674	ids: before_he, ARRAY_SIZE(before_he),
1675	offset);
1676	skb_put_data(skb, data: elems + offset, len: noffset - offset);
1677
1678	return noffset;
1679	}
1680
1681	static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb,
1682	const u8 *elems, size_t elems_len,
1683	size_t offset)
1684	{
1685	static const u8 before_reg_conn[] = {
1686	/*
1687	* no need to list the ones split off before HE
1688	* or generated here
1689	*/
1690	WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER,
1691	WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION,
1692	};
1693	size_t noffset;
1694
1695	if (!elems_len)
1696	return offset;
1697
1698	noffset = ieee80211_ie_split(ies: elems, ielen: elems_len, ids: before_reg_conn,
1699	ARRAY_SIZE(before_reg_conn), offset);
1700	skb_put_data(skb, data: elems + offset, len: noffset - offset);
1701
1702	return noffset;
1703	}
1704
1705	#define PRESENT_ELEMS_MAX 8
1706	#define PRESENT_ELEM_EXT_OFFS 0x100
1707
1708	static void
1709	ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
1710	struct sk_buff *skb, u16 capab,
1711	const struct element *ext_capa,
1712	const u16 *present_elems,
1713	struct ieee80211_mgd_assoc_data *assoc_data);
1714
1715	static size_t
1716	ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata,
1717	struct sk_buff skb, u16 capab,
1718	const struct element *ext_capa,
1719	const u8 *extra_elems,
1720	size_t extra_elems_len,
1721	unsigned int link_id,
1722	struct ieee80211_link_data *link,
1723	u16 *present_elems,
1724	struct ieee80211_mgd_assoc_data *assoc_data)
1725	{
1726	enum nl80211_iftype iftype = ieee80211_vif_type_p2p(vif: &sdata->vif);
1727	struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
1728	struct ieee80211_channel *chan = cbss->channel;
1729	const struct ieee80211_sband_iftype_data *iftd;
1730	struct ieee80211_local *local = sdata->local;
1731	struct ieee80211_supported_band *sband;
1732	enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20;
1733	struct ieee80211_chanctx_conf *chanctx_conf;
1734	enum ieee80211_smps_mode smps_mode;
1735	u16 orig_capab = *capab;
1736	size_t offset = `0`;
1737	int present_elems_len = `0`;
1738	u8 *pos;
1739	int i;
1740
1741	#define ADD_PRESENT_ELEM(id) do { \
1742	/* need a last for termination - we use 0 == SSID */ \
1743	if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \
1744	present_elems[present_elems_len++] = (id); \
1745	} while (0)
1746	#define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS \| (id))
1747
1748	if (link)
1749	smps_mode = link->smps_mode;
1750	else if (sdata->u.mgd.powersave)
1751	smps_mode = IEEE80211_SMPS_DYNAMIC;
1752	else
1753	smps_mode = IEEE80211_SMPS_OFF;
1754
1755	if (link) {
1756	/*
1757	* 5/10 MHz scenarios are only viable without MLO, in which
1758	* case this pointer should be used ... All of this is a bit
1759	* unclear though, not sure this even works at all.
1760	*/
1761	rcu_read_lock();
1762	chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
1763	if (chanctx_conf)
1764	width = chanctx_conf->def.width;
1765	rcu_read_unlock();
1766	}
1767
1768	sband = local->hw.wiphy->bands[chan->band];
1769	iftd = ieee80211_get_sband_iftype_data(sband, iftype);
1770
1771	if (sband->band == NL80211_BAND_2GHZ) {
1772	*capab \|= WLAN_CAPABILITY_SHORT_SLOT_TIME;
1773	*capab \|= WLAN_CAPABILITY_SHORT_PREAMBLE;
1774	}
1775
1776	if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
1777	ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
1778	*capab \|= WLAN_CAPABILITY_SPECTRUM_MGMT;
1779
1780	if (sband->band != NL80211_BAND_S1GHZ)
1781	ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data);
1782
1783	if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT \|\|
1784	*capab & WLAN_CAPABILITY_RADIO_MEASURE) {
1785	struct cfg80211_chan_def chandef = {
1786	.width = width,
1787	.chan = chan,
1788	};
1789
1790	pos = skb_put(skb, len: `4`);
1791	*pos++ = WLAN_EID_PWR_CAPABILITY;
1792	*pos++ = `2`;
1793	pos++ = `0`; /* min tx power /
1794	/ max tx power /
1795	*pos++ = ieee80211_chandef_max_power(chandef: &chandef);
1796	ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY);
1797	}
1798
1799	/*
1800	* Per spec, we shouldn't include the list of channels if we advertise
1801	* support for extended channel switching, but we've always done that;
1802	* (for now?) apply this restriction only on the (new) 6 GHz band.
1803	*/
1804	if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
1805	(sband->band != NL80211_BAND_6GHZ \|\|
1806	!ext_capa \|\| ext_capa->datalen < `1` \|\|
1807	!(ext_capa->data[`0`] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
1808	/ TODO: get this in reg domain format /
1809	pos = skb_put(skb, len: `2` * sband->n_channels + `2`);
1810	*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
1811	pos++ = `2` sband->n_channels;
1812	for (i = `0`; i < sband->n_channels; i++) {
1813	int cf = sband->channels[i].center_freq;
1814
1815	*pos++ = ieee80211_frequency_to_channel(freq: cf);
1816	pos++ = `1`; /* one channel in the subband/
1817	}
1818	ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS);
1819	}
1820
1821	/ if present, add any custom IEs that go before HT /
1822	offset = ieee80211_add_before_ht_elems(skb, elems: extra_elems,
1823	elems_len: extra_elems_len,
1824	offset);
1825
1826	if (sband->band != NL80211_BAND_6GHZ &&
1827	assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) {
1828	ieee80211_add_ht_ie(sdata, skb,
1829	ap_ht_param: assoc_data->link[link_id].ap_ht_param,
1830	sband, channel: chan, smps: smps_mode,
1831	conn: &assoc_data->link[link_id].conn);
1832	ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY);
1833	}
1834
1835	/ if present, add any custom IEs that go before VHT /
1836	offset = ieee80211_add_before_vht_elems(skb, elems: extra_elems,
1837	elems_len: extra_elems_len,
1838	offset);
1839
1840	if (sband->band != NL80211_BAND_6GHZ &&
1841	assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT &&
1842	sband->vht_cap.vht_supported) {
1843	bool mu_mimo_owner =
1844	ieee80211_add_vht_ie(sdata, skb, sband,
1845	ap_vht_cap: &assoc_data->link[link_id].ap_vht_cap,
1846	conn: &assoc_data->link[link_id].conn);
1847
1848	if (link)
1849	link->conf->mu_mimo_owner = mu_mimo_owner;
1850	ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY);
1851	}
1852
1853	/ if present, add any custom IEs that go before HE /
1854	offset = ieee80211_add_before_he_elems(skb, elems: extra_elems,
1855	elems_len: extra_elems_len,
1856	offset);
1857
1858	if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) {
1859	ieee80211_put_he_cap(skb, sdata, sband,
1860	conn: &assoc_data->link[link_id].conn);
1861	ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY);
1862	if (sband->band == NL80211_BAND_6GHZ)
1863	ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode);
1864	}
1865
1866	/*
1867	* if present, add any custom IEs that go before regulatory
1868	* connectivity element
1869	*/
1870	offset = ieee80211_add_before_reg_conn(skb, elems: extra_elems,
1871	elems_len: extra_elems_len, offset);
1872
1873	if (sband->band == NL80211_BAND_6GHZ) {
1874	/*
1875	* as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA
1876	* capable of operating on the 6 GHz band shall transmit
1877	* regulatory connectivity element.
1878	*/
1879	ieee80211_put_reg_conn(skb, flags: chan->flags);
1880	}
1881
1882	/*
1883	* careful - need to know about all the present elems before
1884	* calling ieee80211_assoc_add_ml_elem(), so add this one if
1885	* we're going to put it after the ML element
1886	*/
1887	if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT)
1888	ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY);
1889
1890	if (link_id == assoc_data->assoc_link_id)
1891	ieee80211_assoc_add_ml_elem(sdata, skb, capab: orig_capab, ext_capa,
1892	present_elems, assoc_data);
1893
1894	/ crash if somebody gets it wrong /
1895	present_elems = NULL;
1896
1897	if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT)
1898	ieee80211_put_eht_cap(skb, sdata, sband,
1899	conn: &assoc_data->link[link_id].conn);
1900
1901	if (sband->band == NL80211_BAND_S1GHZ) {
1902	ieee80211_add_aid_request_ie(sdata, skb);
1903	ieee80211_add_s1g_capab_ie(sdata, caps: &sband->s1g_cap, skb);
1904	}
1905
1906	if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len)
1907	skb_put_data(skb, data: iftd->vendor_elems.data, len: iftd->vendor_elems.len);
1908
1909	return offset;
1910	}
1911
1912	static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb,
1913	const u16 *outer,
1914	const u16 *inner)
1915	{
1916	unsigned int skb_len = skb->len;
1917	bool at_extension = false;
1918	bool added = false;
1919	int i, j;
1920	u8 len, list_len = NULL;
1921
1922	skb_put_u8(skb, val: WLAN_EID_EXTENSION);
1923	len = skb_put(skb, len: `1`);
1924	skb_put_u8(skb, val: WLAN_EID_EXT_NON_INHERITANCE);
1925
1926	for (i = `0`; i < PRESENT_ELEMS_MAX && outer[i]; i++) {
1927	u16 elem = outer[i];
1928	bool have_inner = false;
1929
1930	/ should at least be sorted in the sense of normal -> ext /
1931	WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS);
1932
1933	/ switch to extension list /
1934	if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) {
1935	at_extension = true;
1936	if (!list_len)
1937	skb_put_u8(skb, val: `0`);
1938	list_len = NULL;
1939	}
1940
1941	for (j = `0`; j < PRESENT_ELEMS_MAX && inner[j]; j++) {
1942	if (elem == inner[j]) {
1943	have_inner = true;
1944	break;
1945	}
1946	}
1947
1948	if (have_inner)
1949	continue;
1950
1951	if (!list_len) {
1952	list_len = skb_put(skb, len: `1`);
1953	*list_len = `0`;
1954	}
1955	*list_len += `1`;
1956	skb_put_u8(skb, val: (u8)elem);
1957	added = true;
1958	}
1959
1960	/ if we added a list but no extension list, make a zero-len one /
1961	if (added && (!at_extension \|\| !list_len))
1962	skb_put_u8(skb, val: `0`);
1963
1964	/ if nothing added remove extension element completely /
1965	if (!added)
1966	skb_trim(skb, len: skb_len);
1967	else
1968	*len = skb->len - skb_len - `2`;
1969	}
1970
1971	static void
1972	ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
1973	struct sk_buff *skb, u16 capab,
1974	const struct element *ext_capa,
1975	const u16 *outer_present_elems,
1976	struct ieee80211_mgd_assoc_data *assoc_data)
1977	{
1978	struct ieee80211_local *local = sdata->local;
1979	struct ieee80211_multi_link_elem *ml_elem;
1980	struct ieee80211_mle_basic_common_info *common;
1981	const struct wiphy_iftype_ext_capab *ift_ext_capa;
1982	__le16 eml_capa = `0`, mld_capa_ops = `0`;
1983	unsigned int link_id;
1984	u8 *ml_elem_len;
1985	void *capab_pos;
1986
1987	if (!ieee80211_vif_is_mld(vif: &sdata->vif))
1988	return;
1989
1990	ift_ext_capa = cfg80211_get_iftype_ext_capa(wiphy: local->hw.wiphy,
1991	type: ieee80211_vif_type_p2p(vif: &sdata->vif));
1992	if (ift_ext_capa) {
1993	eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities);
1994	mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops);
1995	}
1996
1997	skb_put_u8(skb, val: WLAN_EID_EXTENSION);
1998	ml_elem_len = skb_put(skb, len: `1`);
1999	skb_put_u8(skb, val: WLAN_EID_EXT_EHT_MULTI_LINK);
2000	ml_elem = skb_put(skb, len: sizeof(*ml_elem));
2001	ml_elem->control =
2002	cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC \|
2003	IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP);
2004	common = skb_put(skb, len: sizeof(*common));
2005	common->len = sizeof(*common) +
2006	`2`; / MLD capa/ops /
2007	memcpy(to: common->mld_mac_addr, from: sdata->vif.addr, ETH_ALEN);
2008
2009	/ add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 /
2010	if (eml_capa &
2011	cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP \|
2012	IEEE80211_EML_CAP_EMLMR_SUPPORT))) {
2013	common->len += `2`; / EML capabilities /
2014	ml_elem->control \|=
2015	cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA);
2016	skb_put_data(skb, data: &eml_capa, len: sizeof(eml_capa));
2017	}
2018	skb_put_data(skb, data: &mld_capa_ops, len: sizeof(mld_capa_ops));
2019
2020	if (assoc_data->ext_mld_capa_ops) {
2021	ml_elem->control \|=
2022	cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP);
2023	common->len += `2`;
2024	skb_put_data(skb, data: &assoc_data->ext_mld_capa_ops,
2025	len: sizeof(assoc_data->ext_mld_capa_ops));
2026	}
2027
2028	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
2029	u16 link_present_elems[PRESENT_ELEMS_MAX] = {};
2030	const u8 *extra_elems;
2031	size_t extra_elems_len;
2032	size_t extra_used;
2033	u8 *subelem_len = NULL;
2034	__le16 ctrl;
2035
2036	if (!assoc_data->link[link_id].bss \|\|
2037	link_id == assoc_data->assoc_link_id)
2038	continue;
2039
2040	extra_elems = assoc_data->link[link_id].elems;
2041	extra_elems_len = assoc_data->link[link_id].elems_len;
2042
2043	skb_put_u8(skb, val: IEEE80211_MLE_SUBELEM_PER_STA_PROFILE);
2044	subelem_len = skb_put(skb, len: `1`);
2045
2046	ctrl = cpu_to_le16(link_id \|
2047	IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE \|
2048	IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT);
2049	skb_put_data(skb, data: &ctrl, len: sizeof(ctrl));
2050	skb_put_u8(skb, val: `1` + ETH_ALEN); / STA Info Length /
2051	skb_put_data(skb, data: assoc_data->link[link_id].addr,
2052	ETH_ALEN);
2053	/*
2054	* Now add the contents of the (re)association request,
2055	* but the "listen interval" and "current AP address"
2056	* (if applicable) are skipped. So we only have
2057	* the capability field (remember the position and fill
2058	* later), followed by the elements added below by
2059	* calling ieee80211_add_link_elems().
2060	*/
2061	capab_pos = skb_put(skb, len: `2`);
2062
2063	extra_used = ieee80211_add_link_elems(sdata, skb, capab: &capab,
2064	ext_capa,
2065	extra_elems,
2066	extra_elems_len,
2067	link_id, NULL,
2068	present_elems: link_present_elems,
2069	assoc_data);
2070	if (extra_elems)
2071	skb_put_data(skb, data: extra_elems + extra_used,
2072	len: extra_elems_len - extra_used);
2073
2074	put_unaligned_le16(val: capab, p: capab_pos);
2075
2076	ieee80211_add_non_inheritance_elem(skb, outer: outer_present_elems,
2077	inner: link_present_elems);
2078
2079	ieee80211_fragment_element(skb, len_pos: subelem_len,
2080	frag_id: IEEE80211_MLE_SUBELEM_FRAGMENT);
2081	}
2082
2083	ieee80211_fragment_element(skb, len_pos: ml_elem_len, frag_id: WLAN_EID_FRAGMENT);
2084	}
2085
2086	static int
2087	ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata,
2088	enum nl80211_iftype iftype,
2089	struct cfg80211_bss *cbss,
2090	size_t elems_len)
2091	{
2092	struct ieee80211_local *local = sdata->local;
2093	const struct ieee80211_sband_iftype_data *iftd;
2094	struct ieee80211_supported_band *sband;
2095	size_t size = `0`;
2096
2097	if (!cbss)
2098	return size;
2099
2100	sband = local->hw.wiphy->bands[cbss->channel->band];
2101
2102	/ add STA profile elements length /
2103	size += elems_len;
2104
2105	/ and supported rates length /
2106	size += `4` + sband->n_bitrates;
2107
2108	/ supported channels /
2109	size += `2` + `2` * sband->n_channels;
2110
2111	iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2112	if (iftd)
2113	size += iftd->vendor_elems.len;
2114
2115	/ power capability /
2116	size += `4`;
2117
2118	/ HT, VHT, HE, EHT /
2119	size += `2` + sizeof(struct ieee80211_ht_cap);
2120	size += `2` + sizeof(struct ieee80211_vht_cap);
2121	size += `2` + `1` + sizeof(struct ieee80211_he_cap_elem) +
2122	sizeof(struct ieee80211_he_mcs_nss_supp) +
2123	IEEE80211_HE_PPE_THRES_MAX_LEN;
2124
2125	if (sband->band == NL80211_BAND_6GHZ) {
2126	size += `2` + `1` + sizeof(struct ieee80211_he_6ghz_capa);
2127	/ reg connection /
2128	size += `4`;
2129	}
2130
2131	size += `2` + `1` + sizeof(struct ieee80211_eht_cap_elem) +
2132	sizeof(struct ieee80211_eht_mcs_nss_supp) +
2133	IEEE80211_EHT_PPE_THRES_MAX_LEN;
2134
2135	return size;
2136	}
2137
2138	static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
2139	{
2140	struct ieee80211_local *local = sdata->local;
2141	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2142	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2143	struct ieee80211_link_data *link;
2144	struct sk_buff *skb;
2145	struct ieee80211_mgmt *mgmt;
2146	u8 pos, qos_info, ie_start;
2147	size_t offset, noffset;
2148	u16 capab = `0`, link_capab;
2149	__le16 listen_int;
2150	struct element *ext_capa = NULL;
2151	enum nl80211_iftype iftype = ieee80211_vif_type_p2p(vif: &sdata->vif);
2152	struct ieee80211_prep_tx_info info = {};
2153	unsigned int link_id, n_links = `0`;
2154	u16 present_elems[PRESENT_ELEMS_MAX] = {};
2155	void *capab_pos;
2156	size_t size;
2157	int ret;
2158
2159	/ we know it's writable, cast away the const /
2160	if (assoc_data->ie_len)
2161	ext_capa = (void *)cfg80211_find_elem(eid: WLAN_EID_EXT_CAPABILITY,
2162	ies: assoc_data->ie,
2163	len: assoc_data->ie_len);
2164
2165	lockdep_assert_wiphy(sdata->local->hw.wiphy);
2166
2167	size = local->hw.extra_tx_headroom +
2168	sizeof(mgmt) + /* bit too much but doesn't matter /
2169	`2` + assoc_data->ssid_len + / SSID /
2170	assoc_data->ie_len + / extra IEs /
2171	(assoc_data->fils_kek_len ? `16` / AES-SIV / : `0`) +
2172	`9`; / WMM /
2173
2174	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
2175	struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
2176	size_t elems_len = assoc_data->link[link_id].elems_len;
2177
2178	if (!cbss)
2179	continue;
2180
2181	n_links++;
2182
2183	size += ieee80211_link_common_elems_size(sdata, iftype, cbss,
2184	elems_len);
2185
2186	/ non-inheritance element /
2187	size += `2` + `2` + PRESENT_ELEMS_MAX;
2188
2189	/ should be the same across all BSSes /
2190	if (cbss->capability & WLAN_CAPABILITY_PRIVACY)
2191	capab \|= WLAN_CAPABILITY_PRIVACY;
2192	}
2193
2194	if (ieee80211_vif_is_mld(vif: &sdata->vif)) {
2195	/ consider the multi-link element with STA profile /
2196	size += sizeof(struct ieee80211_multi_link_elem);
2197	/ max common info field in basic multi-link element /
2198	size += sizeof(struct ieee80211_mle_basic_common_info) +
2199	`2` + / capa & op /
2200	`2` + / ext capa & op /
2201	`2`; / EML capa /
2202
2203	/ The capability elements were already considered above /
2204	size += (n_links - `1`) *
2205	(`1` + `1` + / subelement ID/length /
2206	`2` + / STA control /
2207	`1` + ETH_ALEN + `2` / STA Info field /);
2208	}
2209
2210	link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata);
2211	if (WARN_ON(!link))
2212	return -EINVAL;
2213
2214	if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss))
2215	return -EINVAL;
2216
2217	skb = alloc_skb(size, GFP_KERNEL);
2218	if (!skb)
2219	return -ENOMEM;
2220
2221	skb_reserve(skb, len: local->hw.extra_tx_headroom);
2222
2223	if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
2224	capab \|= WLAN_CAPABILITY_RADIO_MEASURE;
2225
2226	/ Set MBSSID support for HE AP if needed /
2227	if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
2228	link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE &&
2229	ext_capa && ext_capa->datalen >= `3`)
2230	ext_capa->data[`2`] \|= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
2231
2232	mgmt = skb_put_zero(skb, len: `24`);
2233	memcpy(to: mgmt->da, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
2234	memcpy(to: mgmt->sa, from: sdata->vif.addr, ETH_ALEN);
2235	memcpy(to: mgmt->bssid, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
2236
2237	listen_int = cpu_to_le16(assoc_data->s1g ?
2238	ieee80211_encode_usf(local->hw.conf.listen_interval) :
2239	local->hw.conf.listen_interval);
2240	if (!is_zero_ether_addr(addr: assoc_data->prev_ap_addr)) {
2241	skb_put(skb, len: `10`);
2242	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT \|
2243	IEEE80211_STYPE_REASSOC_REQ);
2244	capab_pos = &mgmt->u.reassoc_req.capab_info;
2245	mgmt->u.reassoc_req.listen_interval = listen_int;
2246	memcpy(to: mgmt->u.reassoc_req.current_ap,
2247	from: assoc_data->prev_ap_addr, ETH_ALEN);
2248	info.subtype = IEEE80211_STYPE_REASSOC_REQ;
2249	} else {
2250	skb_put(skb, len: `4`);
2251	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT \|
2252	IEEE80211_STYPE_ASSOC_REQ);
2253	capab_pos = &mgmt->u.assoc_req.capab_info;
2254	mgmt->u.assoc_req.listen_interval = listen_int;
2255	info.subtype = IEEE80211_STYPE_ASSOC_REQ;
2256	}
2257
2258	/ SSID /
2259	pos = skb_put(skb, len: `2` + assoc_data->ssid_len);
2260	ie_start = pos;
2261	*pos++ = WLAN_EID_SSID;
2262	*pos++ = assoc_data->ssid_len;
2263	memcpy(to: pos, from: assoc_data->ssid, len: assoc_data->ssid_len);
2264
2265	/*
2266	* This bit is technically reserved, so it shouldn't matter for either
2267	* the AP or us, but it also means we shouldn't set it. However, we've
2268	* always set it in the past, and apparently some EHT APs check that
2269	* we don't set it. To avoid interoperability issues with old APs that
2270	* for some reason check it and want it to be set, set the bit for all
2271	* pre-EHT connections as we used to do.
2272	*/
2273	if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT &&
2274	!ieee80211_hw_check(&local->hw, STRICT))
2275	capab \|= WLAN_CAPABILITY_ESS;
2276
2277	/ add the elements for the assoc (main) link /
2278	link_capab = capab;
2279	offset = ieee80211_add_link_elems(sdata, skb, capab: &link_capab,
2280	ext_capa,
2281	extra_elems: assoc_data->ie,
2282	extra_elems_len: assoc_data->ie_len,
2283	link_id: assoc_data->assoc_link_id, link,
2284	present_elems, assoc_data);
2285	put_unaligned_le16(val: link_capab, p: capab_pos);
2286
2287	/ if present, add any custom non-vendor IEs /
2288	if (assoc_data->ie_len) {
2289	noffset = ieee80211_ie_split_vendor(ies: assoc_data->ie,
2290	ielen: assoc_data->ie_len,
2291	offset);
2292	skb_put_data(skb, data: assoc_data->ie + offset, len: noffset - offset);
2293	offset = noffset;
2294	}
2295
2296	if (assoc_data->wmm) {
2297	if (assoc_data->uapsd) {
2298	qos_info = ifmgd->uapsd_queues;
2299	qos_info \|= (ifmgd->uapsd_max_sp_len <<
2300	IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
2301	} else {
2302	qos_info = `0`;
2303	}
2304
2305	pos = ieee80211_add_wmm_info_ie(buf: skb_put(skb, len: `9`), qosinfo: qos_info);
2306	}
2307
2308	/ add any remaining custom (i.e. vendor specific here) IEs /
2309	if (assoc_data->ie_len) {
2310	noffset = assoc_data->ie_len;
2311	skb_put_data(skb, data: assoc_data->ie + offset, len: noffset - offset);
2312	}
2313
2314	if (assoc_data->fils_kek_len) {
2315	ret = fils_encrypt_assoc_req(skb, assoc_data);
2316	if (ret < `0`) {
2317	dev_kfree_skb(skb);
2318	return ret;
2319	}
2320	}
2321
2322	pos = skb_tail_pointer(skb);
2323	kfree(objp: ifmgd->assoc_req_ies);
2324	ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
2325	if (!ifmgd->assoc_req_ies) {
2326	dev_kfree_skb(skb);
2327	return -ENOMEM;
2328	}
2329
2330	ifmgd->assoc_req_ies_len = pos - ie_start;
2331
2332	info.link_id = assoc_data->assoc_link_id;
2333	drv_mgd_prepare_tx(local, sdata, info: &info);
2334
2335	IEEE80211_SKB_CB(skb)->flags \|= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2336	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2337	IEEE80211_SKB_CB(skb)->flags \|= IEEE80211_TX_CTL_REQ_TX_STATUS \|
2338	IEEE80211_TX_INTFL_MLME_CONN_TX;
2339	ieee80211_tx_skb(sdata, skb);
2340
2341	return `0`;
2342	}
2343
2344	void ieee80211_send_pspoll(struct ieee80211_local *local,
2345	struct ieee80211_sub_if_data *sdata)
2346	{
2347	struct ieee80211_pspoll *pspoll;
2348	struct sk_buff *skb;
2349
2350	skb = ieee80211_pspoll_get(hw: &local->hw, vif: &sdata->vif);
2351	if (!skb)
2352	return;
2353
2354	pspoll = (struct ieee80211_pspoll *) skb->data;
2355	pspoll->frame_control \|= cpu_to_le16(IEEE80211_FCTL_PM);
2356
2357	IEEE80211_SKB_CB(skb)->flags \|= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2358	ieee80211_tx_skb(sdata, skb);
2359	}
2360
2361	void ieee80211_send_nullfunc(struct ieee80211_local *local,
2362	struct ieee80211_sub_if_data *sdata,
2363	bool powersave)
2364	{
2365	struct sk_buff *skb;
2366	struct ieee80211_hdr_3addr *nullfunc;
2367	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2368
2369	skb = ieee80211_nullfunc_get(hw: &local->hw, vif: &sdata->vif, link_id: -`1`,
2370	qos_ok: !ieee80211_hw_check(&local->hw,
2371	DOESNT_SUPPORT_QOS_NDP));
2372	if (!skb)
2373	return;
2374
2375	nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
2376	if (powersave)
2377	nullfunc->frame_control \|= cpu_to_le16(IEEE80211_FCTL_PM);
2378
2379	IEEE80211_SKB_CB(skb)->flags \|= IEEE80211_TX_INTFL_DONT_ENCRYPT \|
2380	IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
2381
2382	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2383	IEEE80211_SKB_CB(skb)->flags \|= IEEE80211_TX_CTL_REQ_TX_STATUS;
2384
2385	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2386	IEEE80211_SKB_CB(skb)->flags \|= IEEE80211_TX_CTL_USE_MINRATE;
2387
2388	ieee80211_tx_skb(sdata, skb);
2389	}
2390
2391	void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
2392	struct ieee80211_sub_if_data *sdata)
2393	{
2394	struct sk_buff *skb;
2395	struct ieee80211_hdr *nullfunc;
2396	__le16 fc;
2397
2398	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2399	return;
2400
2401	skb = dev_alloc_skb(length: local->hw.extra_tx_headroom + `30`);
2402	if (!skb)
2403	return;
2404
2405	skb_reserve(skb, len: local->hw.extra_tx_headroom);
2406
2407	nullfunc = skb_put_zero(skb, len: `30`);
2408	fc = cpu_to_le16(IEEE80211_FTYPE_DATA \| IEEE80211_STYPE_NULLFUNC \|
2409	IEEE80211_FCTL_FROMDS \| IEEE80211_FCTL_TODS);
2410	nullfunc->frame_control = fc;
2411	memcpy(to: nullfunc->addr1, from: sdata->deflink.u.mgd.bssid, ETH_ALEN);
2412	memcpy(to: nullfunc->addr2, from: sdata->vif.addr, ETH_ALEN);
2413	memcpy(to: nullfunc->addr3, from: sdata->deflink.u.mgd.bssid, ETH_ALEN);
2414	memcpy(to: nullfunc->addr4, from: sdata->vif.addr, ETH_ALEN);
2415
2416	IEEE80211_SKB_CB(skb)->flags \|= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2417	IEEE80211_SKB_CB(skb)->flags \|= IEEE80211_TX_CTL_USE_MINRATE;
2418	ieee80211_tx_skb(sdata, skb);
2419	}
2420
2421	/ spectrum management related things /
2422	static void ieee80211_csa_switch_work(struct wiphy *wiphy,
2423	struct wiphy_work *work)
2424	{
2425	struct ieee80211_link_data *link =
2426	container_of(work, struct ieee80211_link_data,
2427	u.mgd.csa.switch_work.work);
2428	struct ieee80211_sub_if_data *sdata = link->sdata;
2429	struct ieee80211_local *local = sdata->local;
2430	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2431	int ret;
2432
2433	if (!ieee80211_sdata_running(sdata))
2434	return;
2435
2436	lockdep_assert_wiphy(local->hw.wiphy);
2437
2438	if (!ifmgd->associated)
2439	return;
2440
2441	if (!link->conf->csa_active)
2442	return;
2443
2444	/*
2445	* If the link isn't active (now), we cannot wait for beacons, won't
2446	* have a reserved chanctx, etc. Just switch over the chandef and
2447	* update cfg80211 directly.
2448	*/
2449	if (!ieee80211_vif_link_active(vif: &sdata->vif, link_id: link->link_id)) {
2450	struct link_sta_info *link_sta;
2451	struct sta_info *ap_sta;
2452
2453	link->conf->chanreq = link->csa.chanreq;
2454	cfg80211_ch_switch_notify(dev: sdata->dev, chandef: &link->csa.chanreq.oper,
2455	link_id: link->link_id);
2456	link->conf->csa_active = false;
2457
2458	ap_sta = sta_info_get(sdata, addr: sdata->vif.cfg.ap_addr);
2459	if (WARN_ON(!ap_sta))
2460	return;
2461
2462	link_sta = wiphy_dereference(wiphy,
2463	ap_sta->link[link->link_id]);
2464	if (WARN_ON(!link_sta))
2465	return;
2466
2467	link_sta->pub->bandwidth =
2468	_ieee80211_sta_cur_vht_bw(link_sta,
2469	chandef: &link->csa.chanreq.oper);
2470	return;
2471	}
2472
2473	/*
2474	* using reservation isn't immediate as it may be deferred until later
2475	* with multi-vif. once reservation is complete it will re-schedule the
2476	* work with no reserved_chanctx so verify chandef to check if it
2477	* completed successfully
2478	*/
2479
2480	if (link->reserved_chanctx) {
2481	/*
2482	* with multi-vif csa driver may call ieee80211_csa_finish()
2483	* many times while waiting for other interfaces to use their
2484	* reservations
2485	*/
2486	if (link->reserved_ready)
2487	return;
2488
2489	ret = ieee80211_link_use_reserved_context(link);
2490	if (ret) {
2491	link_info(link,
2492	"failed to use reserved channel context, disconnecting (err=%d)\n",
2493	ret);
2494	wiphy_work_queue(wiphy: sdata->local->hw.wiphy,
2495	work: &ifmgd->csa_connection_drop_work);
2496	}
2497	return;
2498	}
2499
2500	if (!ieee80211_chanreq_identical(a: &link->conf->chanreq,
2501	b: &link->csa.chanreq)) {
2502	link_info(link,
2503	"failed to finalize channel switch, disconnecting\n");
2504	wiphy_work_queue(wiphy: sdata->local->hw.wiphy,
2505	work: &ifmgd->csa_connection_drop_work);
2506	return;
2507	}
2508
2509	link->u.mgd.csa.waiting_bcn = true;
2510
2511	/ apply new TPE restrictions immediately on the new channel /
2512	if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ &&
2513	link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) {
2514	ieee80211_rearrange_tpe(tpe: &link->u.mgd.csa.tpe,
2515	ap: &link->u.mgd.csa.ap_chandef,
2516	used: &link->conf->chanreq.oper);
2517	if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe,
2518	sizeof(link->u.mgd.csa.tpe))) {
2519	link->conf->tpe = link->u.mgd.csa.tpe;
2520	ieee80211_link_info_change_notify(sdata, link,
2521	changed: BSS_CHANGED_TPE);
2522	}
2523	}
2524
2525	/*
2526	* It is not necessary to reset these timers if any link does not
2527	* have an active CSA and that link still receives the beacons
2528	* when other links have active CSA.
2529	*/
2530	for_each_link_data(sdata, link) {
2531	if (!link->conf->csa_active)
2532	return;
2533	}
2534
2535	/*
2536	* Reset the beacon monitor and connection monitor timers when CSA
2537	* is active for all links in MLO when channel switch occurs in all
2538	* the links.
2539	*/
2540	ieee80211_sta_reset_beacon_monitor(sdata);
2541	ieee80211_sta_reset_conn_monitor(sdata);
2542	}
2543
2544	static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link)
2545	{
2546	struct ieee80211_sub_if_data *sdata = link->sdata;
2547	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2548	int ret;
2549
2550	lockdep_assert_wiphy(sdata->local->hw.wiphy);
2551
2552	WARN_ON(!link->conf->csa_active);
2553
2554	ieee80211_vif_unblock_queues_csa(sdata);
2555
2556	link->conf->csa_active = false;
2557	link->u.mgd.csa.blocked_tx = false;
2558	link->u.mgd.csa.waiting_bcn = false;
2559
2560	ret = drv_post_channel_switch(link);
2561	if (ret) {
2562	link_info(link,
2563	"driver post channel switch failed, disconnecting\n");
2564	wiphy_work_queue(wiphy: sdata->local->hw.wiphy,
2565	work: &ifmgd->csa_connection_drop_work);
2566	return;
2567	}
2568
2569	cfg80211_ch_switch_notify(dev: sdata->dev, chandef: &link->conf->chanreq.oper,
2570	link_id: link->link_id);
2571	}
2572
2573	void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success,
2574	unsigned int link_id)
2575	{
2576	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
2577
2578	trace_api_chswitch_done(sdata, success, link_id);
2579
2580	rcu_read_lock();
2581
2582	if (!success) {
2583	sdata_info(sdata,
2584	"driver channel switch failed (link %d), disconnecting\n",
2585	link_id);
2586	wiphy_work_queue(wiphy: sdata->local->hw.wiphy,
2587	work: &sdata->u.mgd.csa_connection_drop_work);
2588	} else {
2589	struct ieee80211_link_data *link =
2590	rcu_dereference(sdata->link[link_id]);
2591
2592	if (WARN_ON(!link)) {
2593	rcu_read_unlock();
2594	return;
2595	}
2596
2597	wiphy_delayed_work_queue(wiphy: sdata->local->hw.wiphy,
2598	dwork: &link->u.mgd.csa.switch_work, delay: `0`);
2599	}
2600
2601	rcu_read_unlock();
2602	}
2603	EXPORT_SYMBOL(ieee80211_chswitch_done);
2604
2605	static void
2606	ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link)
2607	{
2608	struct ieee80211_sub_if_data *sdata = link->sdata;
2609	struct ieee80211_local *local = sdata->local;
2610
2611	lockdep_assert_wiphy(local->hw.wiphy);
2612
2613	if (!local->ops->abort_channel_switch)
2614	return;
2615
2616	if (rcu_access_pointer(link->conf->chanctx_conf))
2617	ieee80211_link_unreserve_chanctx(link);
2618
2619	ieee80211_vif_unblock_queues_csa(sdata);
2620
2621	link->conf->csa_active = false;
2622	link->u.mgd.csa.blocked_tx = false;
2623
2624	drv_abort_channel_switch(link);
2625	}
2626
2627	struct sta_csa_rnr_iter_data {
2628	struct ieee80211_link_data *link;
2629	struct ieee80211_channel *chan;
2630	u8 mld_id;
2631	};
2632
2633	static enum cfg80211_rnr_iter_ret
2634	ieee80211_sta_csa_rnr_iter(void *_data, u8 type,
2635	const struct ieee80211_neighbor_ap_info *info,
2636	const u8 *tbtt_info, u8 tbtt_info_len)
2637	{
2638	struct sta_csa_rnr_iter_data *data = _data;
2639	struct ieee80211_link_data *link = data->link;
2640	struct ieee80211_sub_if_data *sdata = link->sdata;
2641	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2642	const struct ieee80211_tbtt_info_ge_11 *ti;
2643	enum nl80211_band band;
2644	unsigned int center_freq;
2645	int link_id;
2646
2647	if (type != IEEE80211_TBTT_INFO_TYPE_TBTT)
2648	return RNR_ITER_CONTINUE;
2649
2650	if (tbtt_info_len < sizeof(*ti))
2651	return RNR_ITER_CONTINUE;
2652
2653	ti = (const void *)tbtt_info;
2654
2655	if (ti->mld_params.mld_id != data->mld_id)
2656	return RNR_ITER_CONTINUE;
2657
2658	link_id = le16_get_bits(v: ti->mld_params.params,
2659	IEEE80211_RNR_MLD_PARAMS_LINK_ID);
2660	if (link_id != data->link->link_id)
2661	return RNR_ITER_CONTINUE;
2662
2663	/ we found the entry for our link! /
2664
2665	/ this AP is confused, it had this right before ... just disconnect /
2666	if (!ieee80211_operating_class_to_band(operating_class: info->op_class, band: &band)) {
2667	link_info(link,
2668	"AP now has invalid operating class in RNR, disconnect\n");
2669	wiphy_work_queue(wiphy: sdata->local->hw.wiphy,
2670	work: &ifmgd->csa_connection_drop_work);
2671	return RNR_ITER_BREAK;
2672	}
2673
2674	center_freq = ieee80211_channel_to_frequency(chan: info->channel, band);
2675	data->chan = ieee80211_get_channel(wiphy: sdata->local->hw.wiphy, freq: center_freq);
2676
2677	return RNR_ITER_BREAK;
2678	}
2679
2680	static void
2681	ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link,
2682	struct ieee802_11_elems *elems)
2683	{
2684	struct ieee80211_sub_if_data *sdata = link->sdata;
2685	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2686	struct sta_csa_rnr_iter_data data = {
2687	.link = link,
2688	};
2689
2690	/*
2691	* If we get here, we see a beacon from another link without
2692	* CSA still being reported for it, so now we have to check
2693	* if the CSA was aborted or completed. This may not even be
2694	* perfectly possible if the CSA was only done for changing
2695	* the puncturing, but in that case if the link in inactive
2696	* we don't really care, and if it's an active link (or when
2697	* it's activated later) we'll get a beacon and adjust.
2698	*/
2699
2700	if (WARN_ON(!elems->ml_basic))
2701	return;
2702
2703	data.mld_id = ieee80211_mle_get_mld_id(data: (const void *)elems->ml_basic);
2704
2705	/*
2706	* So in order to do this, iterate the RNR element(s) and see
2707	* what channel is reported now.
2708	*/
2709	cfg80211_iter_rnr(elems: elems->ie_start, elems_len: elems->total_len,
2710	iter: ieee80211_sta_csa_rnr_iter, iter_data: &data);
2711
2712	if (!data.chan) {
2713	link_info(link,
2714	"couldn't find (valid) channel in RNR for CSA, disconnect\n");
2715	wiphy_work_queue(wiphy: sdata->local->hw.wiphy,
2716	work: &ifmgd->csa_connection_drop_work);
2717	return;
2718	}
2719
2720	/*
2721	* If it doesn't match the CSA, then assume it aborted. This
2722	* may erroneously detect that it was _not_ aborted when it
2723	* was in fact aborted, but only changed the bandwidth or the
2724	* puncturing configuration, but we don't have enough data to
2725	* detect that.
2726	*/
2727	if (data.chan != link->csa.chanreq.oper.chan)
2728	ieee80211_sta_abort_chanswitch(link);
2729	}
2730
2731	enum ieee80211_csa_source {
2732	IEEE80211_CSA_SOURCE_BEACON,
2733	IEEE80211_CSA_SOURCE_OTHER_LINK,
2734	IEEE80211_CSA_SOURCE_PROT_ACTION,
2735	IEEE80211_CSA_SOURCE_UNPROT_ACTION,
2736	};
2737
2738	static void
2739	ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link,
2740	u64 timestamp, u32 device_timestamp,
2741	struct ieee802_11_elems *full_elems,
2742	struct ieee802_11_elems *csa_elems,
2743	enum ieee80211_csa_source source)
2744	{
2745	struct ieee80211_sub_if_data *sdata = link->sdata;
2746	struct ieee80211_local *local = sdata->local;
2747	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2748	struct ieee80211_chanctx *chanctx = NULL;
2749	struct ieee80211_chanctx_conf *conf;
2750	struct ieee80211_csa_ie csa_ie = {};
2751	struct ieee80211_channel_switch ch_switch = {
2752	.link_id = link->link_id,
2753	.timestamp = timestamp,
2754	.device_timestamp = device_timestamp,
2755	};
2756	unsigned long now;
2757	int res;
2758
2759	lockdep_assert_wiphy(local->hw.wiphy);
2760
2761	if (csa_elems) {
2762	struct cfg80211_bss *cbss = link->conf->bss;
2763	enum nl80211_band current_band;
2764	struct ieee80211_bss *bss;
2765
2766	if (WARN_ON(!cbss))
2767	return;
2768
2769	current_band = cbss->channel->band;
2770	bss = (void *)cbss->priv;
2771
2772	res = ieee80211_parse_ch_switch_ie(sdata, elems: csa_elems,
2773	current_band,
2774	vht_cap_info: bss->vht_cap_info,
2775	conn: &link->u.mgd.conn,
2776	bssid: link->u.mgd.bssid,
2777	unprot_action: source == IEEE80211_CSA_SOURCE_UNPROT_ACTION,
2778	csa_ie: &csa_ie);
2779	if (res == `0`) {
2780	ch_switch.block_tx = csa_ie.mode;
2781	ch_switch.chandef = csa_ie.chanreq.oper;
2782	ch_switch.count = csa_ie.count;
2783	ch_switch.delay = csa_ie.max_switch_time;
2784	}
2785
2786	link->u.mgd.csa.tpe = csa_elems->csa_tpe;
2787	} else {
2788	/*
2789	* If there was no per-STA profile for this link, we
2790	* get called with csa_elems == NULL. This of course means
2791	* there are no CSA elements, so set res=1 indicating
2792	* no more CSA.
2793	*/
2794	res = `1`;
2795	}
2796
2797	if (res < `0`) {
2798	/ ignore this case, not a protected frame /
2799	if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION)
2800	return;
2801	goto drop_connection;
2802	}
2803
2804	if (link->conf->csa_active) {
2805	switch (source) {
2806	case IEEE80211_CSA_SOURCE_PROT_ACTION:
2807	case IEEE80211_CSA_SOURCE_UNPROT_ACTION:
2808	/ already processing - disregard action frames /
2809	return;
2810	case IEEE80211_CSA_SOURCE_BEACON:
2811	if (link->u.mgd.csa.waiting_bcn) {
2812	ieee80211_chswitch_post_beacon(link);
2813	/*
2814	* If the CSA is still present after the switch
2815	* we need to consider it as a new CSA (possibly
2816	* to self). This happens by not returning here
2817	* so we'll get to the check below.
2818	*/
2819	} else if (res) {
2820	ieee80211_sta_abort_chanswitch(link);
2821	return;
2822	} else {
2823	drv_channel_switch_rx_beacon(sdata, ch_switch: &ch_switch);
2824	return;
2825	}
2826	break;
2827	case IEEE80211_CSA_SOURCE_OTHER_LINK:
2828	/ active link: we want to see the beacon to continue /
2829	if (ieee80211_vif_link_active(vif: &sdata->vif,
2830	link_id: link->link_id))
2831	return;
2832
2833	/ switch work ran, so just complete the process /
2834	if (link->u.mgd.csa.waiting_bcn) {
2835	ieee80211_chswitch_post_beacon(link);
2836	/*
2837	* If the CSA is still present after the switch
2838	* we need to consider it as a new CSA (possibly
2839	* to self). This happens by not returning here
2840	* so we'll get to the check below.
2841	*/
2842	break;
2843	}
2844
2845	/ link still has CSA but we already know, do nothing /
2846	if (!res)
2847	return;
2848
2849	/ check in the RNR if the CSA aborted /
2850	ieee80211_sta_other_link_csa_disappeared(link,
2851	elems: full_elems);
2852	return;
2853	}
2854	}
2855
2856	/ no active CSA nor a new one /
2857	if (res) {
2858	/*
2859	* However, we may have stopped queues when receiving a public
2860	* action frame that couldn't be protected, if it had the quiet
2861	* bit set. This is a trade-off, we want to be quiet as soon as
2862	* possible, but also don't trust the public action frame much,
2863	* as it can't be protected.
2864	*/
2865	if (unlikely(link->u.mgd.csa.blocked_tx)) {
2866	link->u.mgd.csa.blocked_tx = false;
2867	ieee80211_vif_unblock_queues_csa(sdata);
2868	}
2869	return;
2870	}
2871
2872	/*
2873	* We don't really trust public action frames, but block queues (go to
2874	* quiet mode) for them anyway, we should get a beacon soon to either
2875	* know what the CSA really is, or figure out the public action frame
2876	* was actually an attack.
2877	*/
2878	if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) {
2879	if (csa_ie.mode) {
2880	link->u.mgd.csa.blocked_tx = true;
2881	ieee80211_vif_block_queues_csa(sdata);
2882	}
2883	return;
2884	}
2885
2886	if (link->conf->chanreq.oper.chan->band !=
2887	csa_ie.chanreq.oper.chan->band) {
2888	link_info(link,
2889	"AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
2890	link->u.mgd.bssid,
2891	csa_ie.chanreq.oper.chan->center_freq,
2892	csa_ie.chanreq.oper.width,
2893	csa_ie.chanreq.oper.center_freq1,
2894	csa_ie.chanreq.oper.center_freq2);
2895	goto drop_connection;
2896	}
2897
2898	if (!cfg80211_chandef_usable(wiphy: local->hw.wiphy, chandef: &csa_ie.chanreq.oper,
2899	prohibited_flags: IEEE80211_CHAN_DISABLED)) {
2900	link_info(link,
2901	"AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n",
2902	link->u.mgd.bssid,
2903	csa_ie.chanreq.oper.chan->center_freq,
2904	csa_ie.chanreq.oper.chan->freq_offset,
2905	csa_ie.chanreq.oper.width,
2906	csa_ie.chanreq.oper.center_freq1,
2907	csa_ie.chanreq.oper.freq1_offset,
2908	csa_ie.chanreq.oper.center_freq2);
2909	goto drop_connection;
2910	}
2911
2912	if (cfg80211_chandef_identical(chandef1: &csa_ie.chanreq.oper,
2913	chandef2: &link->conf->chanreq.oper) &&
2914	(!csa_ie.mode \|\| source != IEEE80211_CSA_SOURCE_BEACON)) {
2915	if (link->u.mgd.csa.ignored_same_chan)
2916	return;
2917	link_info(link,
2918	"AP %pM tries to chanswitch to same channel, ignore\n",
2919	link->u.mgd.bssid);
2920	link->u.mgd.csa.ignored_same_chan = true;
2921	return;
2922	}
2923
2924	/*
2925	* Drop all TDLS peers on the affected link - either we disconnect or
2926	* move to a different channel from this point on. There's no telling
2927	* what our peer will do.
2928	* The TDLS WIDER_BW scenario is also problematic, as peers might now
2929	* have an incompatible wider chandef.
2930	*/
2931	ieee80211_teardown_tdls_peers(link);
2932
2933	conf = rcu_dereference_protected(link->conf->chanctx_conf,
2934	lockdep_is_held(&local->hw.wiphy->mtx));
2935	if (ieee80211_vif_link_active(vif: &sdata->vif, link_id: link->link_id) && !conf) {
2936	link_info(link,
2937	"no channel context assigned to vif?, disconnecting\n");
2938	goto drop_connection;
2939	}
2940
2941	if (conf)
2942	chanctx = container_of(conf, struct ieee80211_chanctx, conf);
2943
2944	if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
2945	link_info(link,
2946	"driver doesn't support chan-switch with channel contexts\n");
2947	goto drop_connection;
2948	}
2949
2950	if (drv_pre_channel_switch(sdata, ch_switch: &ch_switch)) {
2951	link_info(link,
2952	"preparing for channel switch failed, disconnecting\n");
2953	goto drop_connection;
2954	}
2955
2956	link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap;
2957
2958	link->csa.chanreq.oper = csa_ie.chanreq.oper;
2959	ieee80211_set_chanreq_ap(sdata, chanreq: &link->csa.chanreq, conn: &link->u.mgd.conn,
2960	ap_chandef: &csa_ie.chanreq.ap);
2961
2962	if (chanctx) {
2963	res = ieee80211_link_reserve_chanctx(link, req: &link->csa.chanreq,
2964	mode: chanctx->mode, radar_required: false);
2965	if (res) {
2966	link_info(link,
2967	"failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
2968	res);
2969	goto drop_connection;
2970	}
2971	}
2972
2973	link->conf->csa_active = true;
2974	link->u.mgd.csa.ignored_same_chan = false;
2975	link->u.mgd.beacon_crc_valid = false;
2976	link->u.mgd.csa.blocked_tx = csa_ie.mode;
2977
2978	if (csa_ie.mode)
2979	ieee80211_vif_block_queues_csa(sdata);
2980
2981	cfg80211_ch_switch_started_notify(dev: sdata->dev, chandef: &csa_ie.chanreq.oper,
2982	link_id: link->link_id, count: csa_ie.count,
2983	quiet: csa_ie.mode);
2984
2985	/ we may have to handle timeout for deactivated link in software /
2986	now = jiffies;
2987	link->u.mgd.csa.time = now +
2988	TU_TO_JIFFIES((max_t(int, csa_ie.count, `1`) - `1`) *
2989	link->conf->beacon_int);
2990
2991	if (ieee80211_vif_link_active(vif: &sdata->vif, link_id: link->link_id) &&
2992	local->ops->channel_switch) {
2993	/*
2994	* Use driver's channel switch callback, the driver will
2995	* later call ieee80211_chswitch_done(). It may deactivate
2996	* the link as well, we handle that elsewhere and queue
2997	* the csa.switch_work for the calculated time then.
2998	*/
2999	drv_channel_switch(local, sdata, ch_switch: &ch_switch);
3000	return;
3001	}
3002
3003	/ channel switch handled in software /
3004	wiphy_delayed_work_queue(wiphy: local->hw.wiphy,
3005	dwork: &link->u.mgd.csa.switch_work,
3006	delay: link->u.mgd.csa.time - now);
3007	return;
3008	drop_connection:
3009	/*
3010	* This is just so that the disconnect flow will know that
3011	* we were trying to switch channel and failed. In case the
3012	* mode is 1 (we are not allowed to Tx), we will know not to
3013	* send a deauthentication frame. Those two fields will be
3014	* reset when the disconnection worker runs.
3015	*/
3016	link->conf->csa_active = true;
3017	link->u.mgd.csa.blocked_tx = csa_ie.mode;
3018
3019	wiphy_work_queue(wiphy: sdata->local->hw.wiphy,
3020	work: &ifmgd->csa_connection_drop_work);
3021	}
3022
3023	struct sta_bss_param_ch_cnt_data {
3024	struct ieee80211_sub_if_data *sdata;
3025	u8 reporting_link_id;
3026	u8 mld_id;
3027	};
3028
3029	static enum cfg80211_rnr_iter_ret
3030	ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type,
3031	const struct ieee80211_neighbor_ap_info *info,
3032	const u8 *tbtt_info, u8 tbtt_info_len)
3033	{
3034	struct sta_bss_param_ch_cnt_data *data = _data;
3035	struct ieee80211_sub_if_data *sdata = data->sdata;
3036	const struct ieee80211_tbtt_info_ge_11 *ti;
3037	u8 bss_param_ch_cnt;
3038	int link_id;
3039
3040	if (type != IEEE80211_TBTT_INFO_TYPE_TBTT)
3041	return RNR_ITER_CONTINUE;
3042
3043	if (tbtt_info_len < sizeof(*ti))
3044	return RNR_ITER_CONTINUE;
3045
3046	ti = (const void *)tbtt_info;
3047
3048	if (ti->mld_params.mld_id != data->mld_id)
3049	return RNR_ITER_CONTINUE;
3050
3051	link_id = le16_get_bits(v: ti->mld_params.params,
3052	IEEE80211_RNR_MLD_PARAMS_LINK_ID);
3053	bss_param_ch_cnt =
3054	le16_get_bits(v: ti->mld_params.params,
3055	IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT);
3056
3057	if (bss_param_ch_cnt != `255` &&
3058	link_id < ARRAY_SIZE(sdata->link)) {
3059	struct ieee80211_link_data *link =
3060	sdata_dereference(sdata->link[link_id], sdata);
3061
3062	if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) {
3063	link->conf->bss_param_ch_cnt = bss_param_ch_cnt;
3064	link->conf->bss_param_ch_cnt_link_id =
3065	data->reporting_link_id;
3066	}
3067	}
3068
3069	return RNR_ITER_CONTINUE;
3070	}
3071
3072	static void
3073	ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata,
3074	struct ieee80211_bss_conf *bss_conf,
3075	struct ieee802_11_elems *elems)
3076	{
3077	struct sta_bss_param_ch_cnt_data data = {
3078	.reporting_link_id = bss_conf->link_id,
3079	.sdata = sdata,
3080	};
3081	int bss_param_ch_cnt;
3082
3083	if (!elems->ml_basic)
3084	return;
3085
3086	data.mld_id = ieee80211_mle_get_mld_id(data: (const void *)elems->ml_basic);
3087
3088	cfg80211_iter_rnr(elems: elems->ie_start, elems_len: elems->total_len,
3089	iter: ieee80211_sta_bss_param_ch_cnt_iter, iter_data: &data);
3090
3091	bss_param_ch_cnt =
3092	ieee80211_mle_get_bss_param_ch_cnt(data: (const void *)elems->ml_basic);
3093
3094	/*
3095	* Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt
3096	* didn't change to indicate that we got a beacon on our own
3097	* link.
3098	*/
3099	if (bss_param_ch_cnt >= `0` && bss_param_ch_cnt != `255`) {
3100	bss_conf->bss_param_ch_cnt = bss_param_ch_cnt;
3101	bss_conf->bss_param_ch_cnt_link_id =
3102	bss_conf->link_id;
3103	}
3104	}
3105
3106	static bool
3107	ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel,
3108	const u8 *country_ie, u8 country_ie_len,
3109	const u8 *pwr_constr_elem,
3110	int chan_pwr, int* *pwr_reduction)
3111	{
3112	struct ieee80211_country_ie_triplet *triplet;
3113	int chan = ieee80211_frequency_to_channel(freq: channel->center_freq);
3114	int i, chan_increment;
3115	bool have_chan_pwr = false;
3116
3117	/ Invalid IE /
3118	if (country_ie_len % `2` \|\| country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
3119	return false;
3120
3121	triplet = (void *)(country_ie + `3`);
3122	country_ie_len -= `3`;
3123
3124	switch (channel->band) {
3125	default:
3126	WARN_ON_ONCE(`1`);
3127	fallthrough;
3128	case NL80211_BAND_2GHZ:
3129	case NL80211_BAND_60GHZ:
3130	case NL80211_BAND_LC:
3131	chan_increment = `1`;
3132	break;
3133	case NL80211_BAND_5GHZ:
3134	chan_increment = `4`;
3135	break;
3136	case NL80211_BAND_6GHZ:
3137	/*
3138	* In the 6 GHz band, the "maximum transmit power level"
3139	* field in the triplets is reserved, and thus will be
3140	* zero and we shouldn't use it to control TX power.
3141	* The actual TX power will be given in the transmit
3142	* power envelope element instead.
3143	*/
3144	return false;
3145	}
3146
3147	/ find channel /
3148	while (country_ie_len >= `3`) {
3149	u8 first_channel = triplet->chans.first_channel;
3150
3151	if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
3152	goto next;
3153
3154	for (i = `0`; i < triplet->chans.num_channels; i++) {
3155	if (first_channel + i * chan_increment == chan) {
3156	have_chan_pwr = true;
3157	*chan_pwr = triplet->chans.max_power;
3158	break;
3159	}
3160	}
3161	if (have_chan_pwr)
3162	break;
3163
3164	next:
3165	triplet++;
3166	country_ie_len -= `3`;
3167	}
3168
3169	if (have_chan_pwr && pwr_constr_elem)
3170	pwr_reduction = pwr_constr_elem;
3171	else
3172	*pwr_reduction = `0`;
3173
3174	return have_chan_pwr;
3175	}
3176
3177	static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel,
3178	const u8 *cisco_dtpc_ie,
3179	int *pwr_level)
3180	{
3181	/ From practical testing, the first data byte of the DTPC element*
3182	* seems to contain the requested dBm level, and the CLI on Cisco
3183	* APs clearly state the range is -127 to 127 dBm, which indicates
3184	* a signed byte, although it seemingly never actually goes negative.
3185	* The other byte seems to always be zero.
3186	*/
3187	*pwr_level = (__s8)cisco_dtpc_ie[`4`];
3188	}
3189
3190	static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link,
3191	struct ieee80211_channel *channel,
3192	struct ieee80211_mgmt *mgmt,
3193	const u8 *country_ie, u8 country_ie_len,
3194	const u8 *pwr_constr_ie,
3195	const u8 *cisco_dtpc_ie)
3196	{
3197	struct ieee80211_sub_if_data *sdata = link->sdata;
3198	bool has_80211h_pwr = false, has_cisco_pwr = false;
3199	int chan_pwr = `0`, pwr_reduction_80211h = `0`;
3200	int pwr_level_cisco, pwr_level_80211h;
3201	int new_ap_level;
3202	__le16 capab = mgmt->u.probe_resp.capab_info;
3203
3204	if (ieee80211_is_s1g_beacon(fc: mgmt->frame_control))
3205	return `0`; / TODO /
3206
3207	if (country_ie &&
3208	(capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) \|\|
3209	capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
3210	has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
3211	channel, country_ie, country_ie_len,
3212	pwr_constr_elem: pwr_constr_ie, chan_pwr: &chan_pwr, pwr_reduction: &pwr_reduction_80211h);
3213	pwr_level_80211h =
3214	max_t(int, `0`, chan_pwr - pwr_reduction_80211h);
3215	}
3216
3217	if (cisco_dtpc_ie) {
3218	ieee80211_find_cisco_dtpc(
3219	channel, cisco_dtpc_ie, pwr_level: &pwr_level_cisco);
3220	has_cisco_pwr = true;
3221	}
3222
3223	if (!has_80211h_pwr && !has_cisco_pwr)
3224	return `0`;
3225
3226	/ If we have both 802.11h and Cisco DTPC, apply both limits*
3227	* by picking the smallest of the two power levels advertised.
3228	*/
3229	if (has_80211h_pwr &&
3230	(!has_cisco_pwr \|\| pwr_level_80211h <= pwr_level_cisco)) {
3231	new_ap_level = pwr_level_80211h;
3232
3233	if (link->ap_power_level == new_ap_level)
3234	return `0`;
3235
3236	sdata_dbg(sdata,
3237	"Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
3238	pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
3239	link->u.mgd.bssid);
3240	} else { / has_cisco_pwr is always true here. /
3241	new_ap_level = pwr_level_cisco;
3242
3243	if (link->ap_power_level == new_ap_level)
3244	return `0`;
3245
3246	sdata_dbg(sdata,
3247	"Limiting TX power to %d dBm as advertised by %pM\n",
3248	pwr_level_cisco, link->u.mgd.bssid);
3249	}
3250
3251	link->ap_power_level = new_ap_level;
3252	if (__ieee80211_recalc_txpower(link))
3253	return BSS_CHANGED_TXPOWER;
3254	return `0`;
3255	}
3256
3257	/ powersave /
3258	static void ieee80211_enable_ps(struct ieee80211_local *local,
3259	struct ieee80211_sub_if_data *sdata)
3260	{
3261	struct ieee80211_conf *conf = &local->hw.conf;
3262
3263	/*
3264	* If we are scanning right now then the parameters will
3265	* take effect when scan finishes.
3266	*/
3267	if (local->scanning)
3268	return;
3269
3270	if (conf->dynamic_ps_timeout > `0` &&
3271	!ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
3272	mod_timer(timer: &local->dynamic_ps_timer, expires: jiffies +
3273	msecs_to_jiffies(m: conf->dynamic_ps_timeout));
3274	} else {
3275	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
3276	ieee80211_send_nullfunc(local, sdata, powersave: true);
3277
3278	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3279	ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3280	return;
3281
3282	conf->flags \|= IEEE80211_CONF_PS;
3283	ieee80211_hw_config(local, radio_idx: -`1`, changed: IEEE80211_CONF_CHANGE_PS);
3284	}
3285	}
3286
3287	static void ieee80211_change_ps(struct ieee80211_local *local)
3288	{
3289	struct ieee80211_conf *conf = &local->hw.conf;
3290
3291	if (local->ps_sdata) {
3292	ieee80211_enable_ps(local, sdata: local->ps_sdata);
3293	} else if (conf->flags & IEEE80211_CONF_PS) {
3294	conf->flags &= ~IEEE80211_CONF_PS;
3295	ieee80211_hw_config(local, radio_idx: -`1`, changed: IEEE80211_CONF_CHANGE_PS);
3296	timer_delete_sync(timer: &local->dynamic_ps_timer);
3297	wiphy_work_cancel(wiphy: local->hw.wiphy,
3298	work: &local->dynamic_ps_enable_work);
3299	}
3300	}
3301
3302	static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
3303	{
3304	struct ieee80211_local *local = sdata->local;
3305	struct ieee80211_if_managed *mgd = &sdata->u.mgd;
3306	struct sta_info *sta = NULL;
3307	bool authorized = false;
3308
3309	if (!mgd->powersave)
3310	return false;
3311
3312	if (mgd->broken_ap)
3313	return false;
3314
3315	if (!mgd->associated)
3316	return false;
3317
3318	if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
3319	return false;
3320
3321	if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) &&
3322	!sdata->deflink.u.mgd.have_beacon)
3323	return false;
3324
3325	rcu_read_lock();
3326	sta = sta_info_get(sdata, addr: sdata->vif.cfg.ap_addr);
3327	if (sta)
3328	authorized = test_sta_flag(sta, flag: WLAN_STA_AUTHORIZED);
3329	rcu_read_unlock();
3330
3331	return authorized;
3332	}
3333
3334	/ need to hold RTNL or interface lock /
3335	void ieee80211_recalc_ps(struct ieee80211_local *local)
3336	{
3337	struct ieee80211_sub_if_data sdata, found = NULL;
3338	int count = `0`;
3339	int timeout;
3340
3341	if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) \|\|
3342	ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
3343	local->ps_sdata = NULL;
3344	return;
3345	}
3346
3347	list_for_each_entry(sdata, &local->interfaces, list) {
3348	if (!ieee80211_sdata_running(sdata))
3349	continue;
3350	if (sdata->vif.type == NL80211_IFTYPE_AP) {
3351	/ If an AP vif is found, then disable PS*
3352	* by setting the count to zero thereby setting
3353	* ps_sdata to NULL.
3354	*/
3355	count = `0`;
3356	break;
3357	}
3358	if (sdata->vif.type != NL80211_IFTYPE_STATION)
3359	continue;
3360	found = sdata;
3361	count++;
3362	}
3363
3364	if (count == `1` && ieee80211_powersave_allowed(sdata: found)) {
3365	u8 dtimper = found->deflink.u.mgd.dtim_period;
3366
3367	timeout = local->dynamic_ps_forced_timeout;
3368	if (timeout < `0`)
3369	timeout = `100`;
3370	local->hw.conf.dynamic_ps_timeout = timeout;
3371
3372	/ If the TIM IE is invalid, pretend the value is 1 /
3373	if (!dtimper)
3374	dtimper = `1`;
3375
3376	local->hw.conf.ps_dtim_period = dtimper;
3377	local->ps_sdata = found;
3378	} else {
3379	local->ps_sdata = NULL;
3380	}
3381
3382	ieee80211_change_ps(local);
3383	}
3384
3385	void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
3386	{
3387	bool ps_allowed = ieee80211_powersave_allowed(sdata);
3388
3389	if (sdata->vif.cfg.ps != ps_allowed) {
3390	sdata->vif.cfg.ps = ps_allowed;
3391	ieee80211_vif_cfg_change_notify(sdata, changed: BSS_CHANGED_PS);
3392	}
3393	}
3394
3395	void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy,
3396	struct wiphy_work *work)
3397	{
3398	struct ieee80211_local *local =
3399	container_of(work, struct ieee80211_local,
3400	dynamic_ps_disable_work);
3401
3402	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3403	local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3404	ieee80211_hw_config(local, radio_idx: -`1`, changed: IEEE80211_CONF_CHANGE_PS);
3405	}
3406
3407	ieee80211_wake_queues_by_reason(hw: &local->hw,
3408	queues: IEEE80211_MAX_QUEUE_MAP,
3409	reason: IEEE80211_QUEUE_STOP_REASON_PS,
3410	refcounted: false);
3411	}
3412
3413	void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy,
3414	struct wiphy_work *work)
3415	{
3416	struct ieee80211_local *local =
3417	container_of(work, struct ieee80211_local,
3418	dynamic_ps_enable_work);
3419	struct ieee80211_sub_if_data *sdata = local->ps_sdata;
3420	struct ieee80211_if_managed *ifmgd;
3421	unsigned long flags;
3422	int q;
3423
3424	/ can only happen when PS was just disabled anyway /
3425	if (!sdata)
3426	return;
3427
3428	ifmgd = &sdata->u.mgd;
3429
3430	if (local->hw.conf.flags & IEEE80211_CONF_PS)
3431	return;
3432
3433	if (local->hw.conf.dynamic_ps_timeout > `0`) {
3434	/ don't enter PS if TX frames are pending /
3435	if (drv_tx_frames_pending(local)) {
3436	mod_timer(timer: &local->dynamic_ps_timer, expires: jiffies +
3437	msecs_to_jiffies(
3438	m: local->hw.conf.dynamic_ps_timeout));
3439	return;
3440	}
3441
3442	/*
3443	* transmission can be stopped by others which leads to
3444	* dynamic_ps_timer expiry. Postpone the ps timer if it
3445	* is not the actual idle state.
3446	*/
3447	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3448	for (q = `0`; q < local->hw.queues; q++) {
3449	if (local->queue_stop_reasons[q]) {
3450	spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock,
3451	flags);
3452	mod_timer(timer: &local->dynamic_ps_timer, expires: jiffies +
3453	msecs_to_jiffies(
3454	m: local->hw.conf.dynamic_ps_timeout));
3455	return;
3456	}
3457	}
3458	spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock, flags);
3459	}
3460
3461	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3462	!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
3463	if (drv_tx_frames_pending(local)) {
3464	mod_timer(timer: &local->dynamic_ps_timer, expires: jiffies +
3465	msecs_to_jiffies(
3466	m: local->hw.conf.dynamic_ps_timeout));
3467	} else {
3468	ieee80211_send_nullfunc(local, sdata, powersave: true);
3469	/ Flush to get the tx status of nullfunc frame /
3470	ieee80211_flush_queues(local, sdata, drop: false);
3471	}
3472	}
3473
3474	if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
3475	ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) \|\|
3476	(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
3477	ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
3478	local->hw.conf.flags \|= IEEE80211_CONF_PS;
3479	ieee80211_hw_config(local, radio_idx: -`1`, changed: IEEE80211_CONF_CHANGE_PS);
3480	}
3481	}
3482
3483	void ieee80211_dynamic_ps_timer(struct timer_list *t)
3484	{
3485	struct ieee80211_local *local = timer_container_of(local, t,
3486	dynamic_ps_timer);
3487
3488	wiphy_work_queue(wiphy: local->hw.wiphy, work: &local->dynamic_ps_enable_work);
3489	}
3490
3491	void ieee80211_dfs_cac_timer_work(struct wiphy wiphy, struct* wiphy_work *work)
3492	{
3493	struct ieee80211_link_data *link =
3494	container_of(work, struct ieee80211_link_data,
3495	dfs_cac_timer_work.work);
3496	struct cfg80211_chan_def chandef = link->conf->chanreq.oper;
3497	struct ieee80211_sub_if_data *sdata = link->sdata;
3498
3499	lockdep_assert_wiphy(sdata->local->hw.wiphy);
3500
3501	if (sdata->wdev.links[link->link_id].cac_started) {
3502	ieee80211_link_release_channel(link);
3503	cfg80211_cac_event(netdev: sdata->dev, chandef: &chandef,
3504	event: NL80211_RADAR_CAC_FINISHED,
3505	GFP_KERNEL, link_id: link->link_id);
3506	}
3507	}
3508
3509	static bool
3510	__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
3511	{
3512	struct ieee80211_local *local = sdata->local;
3513	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3514	bool ret = false;
3515	int ac;
3516
3517	if (local->hw.queues < IEEE80211_NUM_ACS)
3518	return false;
3519
3520	for (ac = `0`; ac < IEEE80211_NUM_ACS; ac++) {
3521	struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
3522	int non_acm_ac;
3523	unsigned long now = jiffies;
3524
3525	if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
3526	tx_tspec->admitted_time &&
3527	time_after(now, tx_tspec->time_slice_start + HZ)) {
3528	tx_tspec->consumed_tx_time = `0`;
3529	tx_tspec->time_slice_start = now;
3530
3531	if (tx_tspec->downgraded)
3532	tx_tspec->action =
3533	TX_TSPEC_ACTION_STOP_DOWNGRADE;
3534	}
3535
3536	switch (tx_tspec->action) {
3537	case TX_TSPEC_ACTION_STOP_DOWNGRADE:
3538	/ take the original parameters /
3539	if (drv_conf_tx(local, link: &sdata->deflink, ac,
3540	params: &sdata->deflink.tx_conf[ac]))
3541	link_err(&sdata->deflink,
3542	"failed to set TX queue parameters for queue %d\n",
3543	ac);
3544	tx_tspec->action = TX_TSPEC_ACTION_NONE;
3545	tx_tspec->downgraded = false;
3546	ret = true;
3547	break;
3548	case TX_TSPEC_ACTION_DOWNGRADE:
3549	if (time_after(now, tx_tspec->time_slice_start + HZ)) {
3550	tx_tspec->action = TX_TSPEC_ACTION_NONE;
3551	ret = true;
3552	break;
3553	}
3554	/ downgrade next lower non-ACM AC /
3555	for (non_acm_ac = ac + `1`;
3556	non_acm_ac < IEEE80211_NUM_ACS;
3557	non_acm_ac++)
3558	if (!(sdata->wmm_acm & BIT(`7` - `2` * non_acm_ac)))
3559	break;
3560	/ Usually the loop will result in using BK even if it*
3561	* requires admission control, but such a configuration
3562	* makes no sense and we have to transmit somehow - the
3563	* AC selection does the same thing.
3564	* If we started out trying to downgrade from BK, then
3565	* the extra condition here might be needed.
3566	*/
3567	if (non_acm_ac >= IEEE80211_NUM_ACS)
3568	non_acm_ac = IEEE80211_AC_BK;
3569	if (drv_conf_tx(local, link: &sdata->deflink, ac,
3570	params: &sdata->deflink.tx_conf[non_acm_ac]))
3571	link_err(&sdata->deflink,
3572	"failed to set TX queue parameters for queue %d\n",
3573	ac);
3574	tx_tspec->action = TX_TSPEC_ACTION_NONE;
3575	ret = true;
3576	wiphy_delayed_work_queue(wiphy: local->hw.wiphy,
3577	dwork: &ifmgd->tx_tspec_wk,
3578	delay: tx_tspec->time_slice_start +
3579	HZ - now + `1`);
3580	break;
3581	case TX_TSPEC_ACTION_NONE:
3582	/ nothing now /
3583	break;
3584	}
3585	}
3586
3587	return ret;
3588	}
3589
3590	void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
3591	{
3592	if (__ieee80211_sta_handle_tspec_ac_params(sdata))
3593	ieee80211_link_info_change_notify(sdata, link: &sdata->deflink,
3594	changed: BSS_CHANGED_QOS);
3595	}
3596
3597	static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy,
3598	struct wiphy_work *work)
3599	{
3600	struct ieee80211_sub_if_data *sdata;
3601
3602	sdata = container_of(work, struct ieee80211_sub_if_data,
3603	u.mgd.tx_tspec_wk.work);
3604	ieee80211_sta_handle_tspec_ac_params(sdata);
3605	}
3606
3607	void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link)
3608	{
3609	struct ieee80211_sub_if_data *sdata = link->sdata;
3610	struct ieee80211_local *local = sdata->local;
3611	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3612	struct ieee80211_tx_queue_params *params = link->tx_conf;
3613	u8 ac;
3614
3615	for (ac = `0`; ac < IEEE80211_NUM_ACS; ac++) {
3616	mlme_dbg(sdata,
3617	"WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
3618	ac, params[ac].acm,
3619	params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
3620	params[ac].txop, params[ac].uapsd,
3621	ifmgd->tx_tspec[ac].downgraded);
3622	if (!ifmgd->tx_tspec[ac].downgraded &&
3623	drv_conf_tx(local, link, ac, params: &params[ac]))
3624	link_err(link,
3625	"failed to set TX queue parameters for AC %d\n",
3626	ac);
3627	}
3628	}
3629
3630	/ MLME /
3631	static bool
3632	_ieee80211_sta_wmm_params(struct ieee80211_local *local,
3633	struct ieee80211_link_data *link,
3634	const u8 *wmm_param, size_t wmm_param_len,
3635	const struct ieee80211_mu_edca_param_set *mu_edca)
3636	{
3637	struct ieee80211_sub_if_data *sdata = link->sdata;
3638	struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
3639	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3640	size_t left;
3641	int count, mu_edca_count, ac;
3642	const u8 *pos;
3643	u8 uapsd_queues = `0`;
3644
3645	if (!local->ops->conf_tx)
3646	return false;
3647
3648	if (local->hw.queues < IEEE80211_NUM_ACS)
3649	return false;
3650
3651	if (!wmm_param)
3652	return false;
3653
3654	if (wmm_param_len < `8` \|\| wmm_param[`5`] / version / != `1`)
3655	return false;
3656
3657	if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
3658	uapsd_queues = ifmgd->uapsd_queues;
3659
3660	count = wmm_param[`6`] & `0x0f`;
3661	/ -1 is the initial value of ifmgd->mu_edca_last_param_set.*
3662	* if mu_edca was preset before and now it disappeared tell
3663	* the driver about it.
3664	*/
3665	mu_edca_count = mu_edca ? mu_edca->mu_qos_info & `0x0f` : -`1`;
3666	if (count == link->u.mgd.wmm_last_param_set &&
3667	mu_edca_count == link->u.mgd.mu_edca_last_param_set)
3668	return false;
3669	link->u.mgd.wmm_last_param_set = count;
3670	link->u.mgd.mu_edca_last_param_set = mu_edca_count;
3671
3672	pos = wmm_param + `8`;
3673	left = wmm_param_len - `8`;
3674
3675	memset(s: &params, c: `0`, n: sizeof(params));
3676
3677	sdata->wmm_acm = `0`;
3678	for (; left >= `4`; left -= `4`, pos += `4`) {
3679	int aci = (pos[`0`] >> `5`) & `0x03`;
3680	int acm = (pos[`0`] >> `4`) & `0x01`;
3681	bool uapsd = false;
3682
3683	switch (aci) {
3684	case `1`: / AC_BK /
3685	ac = IEEE80211_AC_BK;
3686	if (acm)
3687	sdata->wmm_acm \|= BIT(`1`) \| BIT(`2`); / BK/- /
3688	if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
3689	uapsd = true;
3690	params[ac].mu_edca = !!mu_edca;
3691	if (mu_edca)
3692	params[ac].mu_edca_param_rec = mu_edca->ac_bk;
3693	break;
3694	case `2`: / AC_VI /
3695	ac = IEEE80211_AC_VI;
3696	if (acm)
3697	sdata->wmm_acm \|= BIT(`4`) \| BIT(`5`); / CL/VI /
3698	if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
3699	uapsd = true;
3700	params[ac].mu_edca = !!mu_edca;
3701	if (mu_edca)
3702	params[ac].mu_edca_param_rec = mu_edca->ac_vi;
3703	break;
3704	case `3`: / AC_VO /
3705	ac = IEEE80211_AC_VO;
3706	if (acm)
3707	sdata->wmm_acm \|= BIT(`6`) \| BIT(`7`); / VO/NC /
3708	if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
3709	uapsd = true;
3710	params[ac].mu_edca = !!mu_edca;
3711	if (mu_edca)
3712	params[ac].mu_edca_param_rec = mu_edca->ac_vo;
3713	break;
3714	case `0`: / AC_BE /
3715	default:
3716	ac = IEEE80211_AC_BE;
3717	if (acm)
3718	sdata->wmm_acm \|= BIT(`0`) \| BIT(`3`); / BE/EE /
3719	if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
3720	uapsd = true;
3721	params[ac].mu_edca = !!mu_edca;
3722	if (mu_edca)
3723	params[ac].mu_edca_param_rec = mu_edca->ac_be;
3724	break;
3725	}
3726
3727	params[ac].aifs = pos[`0`] & `0x0f`;
3728
3729	if (params[ac].aifs < `2`) {
3730	link_info(link,
3731	"AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
3732	params[ac].aifs, aci);
3733	params[ac].aifs = `2`;
3734	}
3735	params[ac].cw_max = ecw2cw(ecw: (pos[`1`] & `0xf0`) >> `4`);
3736	params[ac].cw_min = ecw2cw(ecw: pos[`1`] & `0x0f`);
3737	params[ac].txop = get_unaligned_le16(p: pos + `2`);
3738	params[ac].acm = acm;
3739	params[ac].uapsd = uapsd;
3740
3741	if (params[ac].cw_min == `0` \|\|
3742	params[ac].cw_min > params[ac].cw_max) {
3743	link_info(link,
3744	"AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
3745	params[ac].cw_min, params[ac].cw_max, aci);
3746	return false;
3747	}
3748	ieee80211_regulatory_limit_wmm_params(sdata, qparam: &params[ac], ac);
3749	}
3750
3751	/ WMM specification requires all 4 ACIs. /
3752	for (ac = `0`; ac < IEEE80211_NUM_ACS; ac++) {
3753	if (params[ac].cw_min == `0`) {
3754	link_info(link,
3755	"AP has invalid WMM params (missing AC %d), using defaults\n",
3756	ac);
3757	return false;
3758	}
3759	}
3760
3761	for (ac = `0`; ac < IEEE80211_NUM_ACS; ac++)
3762	link->tx_conf[ac] = params[ac];
3763
3764	return true;
3765	}
3766
3767	static bool
3768	ieee80211_sta_wmm_params(struct ieee80211_local *local,
3769	struct ieee80211_link_data *link,
3770	const u8 *wmm_param, size_t wmm_param_len,
3771	const struct ieee80211_mu_edca_param_set *mu_edca)
3772	{
3773	if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len,
3774	mu_edca))
3775	return false;
3776
3777	ieee80211_mgd_set_link_qos_params(link);
3778
3779	/ enable WMM or activate new settings /
3780	link->conf->qos = true;
3781	return true;
3782	}
3783
3784	static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
3785	{
3786	lockdep_assert_wiphy(sdata->local->hw.wiphy);
3787
3788	sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
3789	ieee80211_run_deferred_scan(local: sdata->local);
3790	}
3791
3792	static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
3793	{
3794	lockdep_assert_wiphy(sdata->local->hw.wiphy);
3795
3796	__ieee80211_stop_poll(sdata);
3797	}
3798
3799	static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link,
3800	u16 capab, bool erp_valid, u8 erp)
3801	{
3802	struct ieee80211_bss_conf *bss_conf = link->conf;
3803	struct ieee80211_supported_band *sband;
3804	u64 changed = `0`;
3805	bool use_protection;
3806	bool use_short_preamble;
3807	bool use_short_slot;
3808
3809	sband = ieee80211_get_link_sband(link);
3810	if (!sband)
3811	return changed;
3812
3813	if (erp_valid) {
3814	use_protection = (erp & WLAN_ERP_USE_PROTECTION) != `0`;
3815	use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == `0`;
3816	} else {
3817	use_protection = false;
3818	use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
3819	}
3820
3821	use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
3822	if (sband->band == NL80211_BAND_5GHZ \|\|
3823	sband->band == NL80211_BAND_6GHZ)
3824	use_short_slot = true;
3825
3826	if (use_protection != bss_conf->use_cts_prot) {
3827	bss_conf->use_cts_prot = use_protection;
3828	changed \|= BSS_CHANGED_ERP_CTS_PROT;
3829	}
3830
3831	if (use_short_preamble != bss_conf->use_short_preamble) {
3832	bss_conf->use_short_preamble = use_short_preamble;
3833	changed \|= BSS_CHANGED_ERP_PREAMBLE;
3834	}
3835
3836	if (use_short_slot != bss_conf->use_short_slot) {
3837	bss_conf->use_short_slot = use_short_slot;
3838	changed \|= BSS_CHANGED_ERP_SLOT;
3839	}
3840
3841	return changed;
3842	}
3843
3844	static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link,
3845	struct cfg80211_bss *cbss)
3846	{
3847	struct ieee80211_sub_if_data *sdata = link->sdata;
3848	struct ieee80211_bss_conf *bss_conf = link->conf;
3849	struct ieee80211_bss bss = (void* *)cbss->priv;
3850	u64 changed = BSS_CHANGED_QOS;
3851
3852	/ not really used in MLO /
3853	sdata->u.mgd.beacon_timeout =
3854	usecs_to_jiffies(u: ieee80211_tu_to_usec(tu: beacon_loss_count *
3855	bss_conf->beacon_int));
3856
3857	changed \|= ieee80211_handle_bss_capability(link,
3858	capab: bss_conf->assoc_capability,
3859	erp_valid: bss->has_erp_value,
3860	erp: bss->erp_value);
3861
3862	ieee80211_check_rate_mask(link);
3863
3864	link->conf->bss = cbss;
3865	memcpy(to: link->u.mgd.bssid, from: cbss->bssid, ETH_ALEN);
3866
3867	if (sdata->vif.p2p \|\|
3868	sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3869	const struct cfg80211_bss_ies *ies;
3870
3871	rcu_read_lock();
3872	ies = rcu_dereference(cbss->ies);
3873	if (ies) {
3874	int ret;
3875
3876	ret = cfg80211_get_p2p_attr(
3877	ies: ies->data, len: ies->len,
3878	attr: IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3879	buf: (u8 *) &bss_conf->p2p_noa_attr,
3880	bufsize: sizeof(bss_conf->p2p_noa_attr));
3881	if (ret >= `2`) {
3882	link->u.mgd.p2p_noa_index =
3883	bss_conf->p2p_noa_attr.index;
3884	changed \|= BSS_CHANGED_P2P_PS;
3885	}
3886	}
3887	rcu_read_unlock();
3888	}
3889
3890	if (link->u.mgd.have_beacon) {
3891	bss_conf->beacon_rate = bss->beacon_rate;
3892	changed \|= BSS_CHANGED_BEACON_INFO;
3893	} else {
3894	bss_conf->beacon_rate = NULL;
3895	}
3896
3897	/ Tell the driver to monitor connection quality (if supported) /
3898	if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
3899	bss_conf->cqm_rssi_thold)
3900	changed \|= BSS_CHANGED_CQM;
3901
3902	return changed;
3903	}
3904
3905	static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
3906	struct ieee80211_mgd_assoc_data *assoc_data,
3907	u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])
3908	{
3909	struct ieee80211_local *local = sdata->local;
3910	struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
3911	u64 vif_changed = BSS_CHANGED_ASSOC;
3912	unsigned int link_id;
3913
3914	lockdep_assert_wiphy(local->hw.wiphy);
3915
3916	sdata->u.mgd.associated = true;
3917
3918	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
3919	struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
3920	struct ieee80211_link_data *link;
3921
3922	if (!cbss \|\|
3923	assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS)
3924	continue;
3925
3926	if (ieee80211_vif_is_mld(vif: &sdata->vif) &&
3927	!(ieee80211_vif_usable_links(vif: &sdata->vif) & BIT(link_id)))
3928	continue;
3929
3930	link = sdata_dereference(sdata->link[link_id], sdata);
3931	if (WARN_ON(!link))
3932	return;
3933
3934	changed[link_id] \|= ieee80211_link_set_associated(link, cbss);
3935	}
3936
3937	/ just to be sure /
3938	ieee80211_stop_poll(sdata);
3939
3940	ieee80211_led_assoc(local, associated: `1`);
3941
3942	vif_cfg->assoc = `1`;
3943
3944	/ Enable ARP filtering /
3945	if (vif_cfg->arp_addr_cnt)
3946	vif_changed \|= BSS_CHANGED_ARP_FILTER;
3947
3948	if (ieee80211_vif_is_mld(vif: &sdata->vif)) {
3949	for (link_id = `0`;
3950	link_id < IEEE80211_MLD_MAX_NUM_LINKS;
3951	link_id++) {
3952	struct ieee80211_link_data *link;
3953	struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
3954
3955	if (!cbss \|\|
3956	!(BIT(link_id) &
3957	ieee80211_vif_usable_links(vif: &sdata->vif)) \|\|
3958	assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS)
3959	continue;
3960
3961	link = sdata_dereference(sdata->link[link_id], sdata);
3962	if (WARN_ON(!link))
3963	return;
3964
3965	ieee80211_link_info_change_notify(sdata, link,
3966	changed: changed[link_id]);
3967
3968	ieee80211_recalc_smps(sdata, link);
3969	}
3970
3971	ieee80211_vif_cfg_change_notify(sdata, changed: vif_changed);
3972	} else {
3973	ieee80211_bss_info_change_notify(sdata,
3974	changed: vif_changed \| changed[`0`]);
3975	}
3976
3977	ieee80211_recalc_ps(local);
3978
3979	/ leave this here to not change ordering in non-MLO cases /
3980	if (!ieee80211_vif_is_mld(vif: &sdata->vif))
3981	ieee80211_recalc_smps(sdata, link: &sdata->deflink);
3982	ieee80211_recalc_ps_vif(sdata);
3983
3984	netif_carrier_on(dev: sdata->dev);
3985	}
3986
3987	static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata)
3988	{
3989	struct ieee80211_mgd_assoc_data *add_links_data =
3990	sdata->u.mgd.reconf.add_links_data;
3991
3992	if (!ieee80211_vif_is_mld(vif: &sdata->vif) \|\|
3993	!(sdata->u.mgd.reconf.added_links \|
3994	sdata->u.mgd.reconf.removed_links))
3995	return;
3996
3997	wiphy_delayed_work_cancel(wiphy: sdata->local->hw.wiphy,
3998	dwork: &sdata->u.mgd.reconf.wk);
3999	sdata->u.mgd.reconf.added_links = `0`;
4000	sdata->u.mgd.reconf.removed_links = `0`;
4001	sdata->u.mgd.reconf.dialog_token = `0`;
4002
4003	if (add_links_data) {
4004	struct cfg80211_mlo_reconf_done_data done_data = {};
4005	u8 link_id;
4006
4007	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS;
4008	link_id++)
4009	done_data.links[link_id].bss =
4010	add_links_data->link[link_id].bss;
4011
4012	cfg80211_mlo_reconf_add_done(dev: sdata->dev, data: &done_data);
4013
4014	kfree(objp: sdata->u.mgd.reconf.add_links_data);
4015	sdata->u.mgd.reconf.add_links_data = NULL;
4016	}
4017	}
4018
4019	static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
4020	u16 stype, u16 reason, bool tx,
4021	u8 *frame_buf)
4022	{
4023	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4024	struct ieee80211_local *local = sdata->local;
4025	struct sta_info *ap_sta = sta_info_get(sdata, addr: sdata->vif.cfg.ap_addr);
4026	unsigned int link_id;
4027	u64 changed = `0`;
4028	struct ieee80211_prep_tx_info info = {
4029	.subtype = stype,
4030	.was_assoc = true,
4031	.link_id = ffs(sdata->vif.active_links) - `1`,
4032	};
4033
4034	lockdep_assert_wiphy(local->hw.wiphy);
4035
4036	if (frame_buf)
4037	memset(s: frame_buf, c: `0`, IEEE80211_DEAUTH_FRAME_LEN);
4038
4039	if (WARN_ON(!ap_sta))
4040	return;
4041
4042	if (WARN_ON_ONCE(tx && !frame_buf))
4043	return;
4044
4045	if (WARN_ON(!ifmgd->associated))
4046	return;
4047
4048	ieee80211_stop_poll(sdata);
4049
4050	ifmgd->associated = false;
4051
4052	if (tx) {
4053	bool tx_link_found = false;
4054
4055	for (link_id = `0`;
4056	link_id < ARRAY_SIZE(sdata->link);
4057	link_id++) {
4058	struct ieee80211_link_data *link;
4059
4060	if (!ieee80211_vif_link_active(vif: &sdata->vif, link_id))
4061	continue;
4062
4063	link = sdata_dereference(sdata->link[link_id], sdata);
4064	if (WARN_ON_ONCE(!link))
4065	continue;
4066
4067	if (link->u.mgd.csa.blocked_tx)
4068	continue;
4069
4070	tx_link_found = true;
4071	break;
4072	}
4073
4074	tx = tx_link_found;
4075	}
4076
4077	/ other links will be destroyed /
4078	sdata->deflink.conf->bss = NULL;
4079	sdata->deflink.conf->epcs_support = false;
4080	sdata->deflink.smps_mode = IEEE80211_SMPS_OFF;
4081
4082	netif_carrier_off(dev: sdata->dev);
4083
4084	/*
4085	* if we want to get out of ps before disassoc (why?) we have
4086	* to do it before sending disassoc, as otherwise the null-packet
4087	* won't be valid.
4088	*/
4089	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
4090	local->hw.conf.flags &= ~IEEE80211_CONF_PS;
4091	ieee80211_hw_config(local, radio_idx: -`1`, changed: IEEE80211_CONF_CHANGE_PS);
4092	}
4093	local->ps_sdata = NULL;
4094
4095	/ disable per-vif ps /
4096	ieee80211_recalc_ps_vif(sdata);
4097
4098	/ make sure ongoing transmission finishes /
4099	synchronize_net();
4100
4101	/*
4102	* drop any frame before deauth/disassoc, this can be data or
4103	* management frame. Since we are disconnecting, we should not
4104	* insist sending these frames which can take time and delay
4105	* the disconnection and possible the roaming.
4106	*/
4107	ieee80211_flush_queues(local, sdata, drop: true);
4108
4109	if (tx) {
4110	drv_mgd_prepare_tx(local: sdata->local, sdata, info: &info);
4111
4112	ieee80211_send_deauth_disassoc(sdata, da: sdata->vif.cfg.ap_addr,
4113	bssid: sdata->vif.cfg.ap_addr, stype,
4114	reason, send_frame: true, frame_buf);
4115
4116	/ flush out frame - make sure the deauth was actually sent /
4117	ieee80211_flush_queues(local, sdata, drop: false);
4118
4119	drv_mgd_complete_tx(local: sdata->local, sdata, info: &info);
4120	} else if (frame_buf) {
4121	ieee80211_send_deauth_disassoc(sdata, da: sdata->vif.cfg.ap_addr,
4122	bssid: sdata->vif.cfg.ap_addr, stype,
4123	reason, send_frame: false, frame_buf);
4124	}
4125
4126	/ clear AP addr only after building the needed mgmt frames /
4127	eth_zero_addr(addr: sdata->deflink.u.mgd.bssid);
4128	eth_zero_addr(addr: sdata->vif.cfg.ap_addr);
4129
4130	sdata->vif.cfg.ssid_len = `0`;
4131
4132	/ Remove TDLS peers /
4133	__sta_info_flush(sdata, vlans: false, link_id: -`1`, do_not_flush_sta: ap_sta);
4134
4135	if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) {
4136	/ Only move the AP state /
4137	sta_info_move_state(sta: ap_sta, new_state: IEEE80211_STA_NONE);
4138	} else {
4139	/ Remove AP peer /
4140	sta_info_flush(sdata, link_id: -`1`);
4141	}
4142
4143	/ finally reset all BSS / config parameters /
4144	if (!ieee80211_vif_is_mld(vif: &sdata->vif))
4145	changed \|= ieee80211_reset_erp_info(sdata);
4146
4147	ieee80211_led_assoc(local, associated: `0`);
4148	changed \|= BSS_CHANGED_ASSOC;
4149	sdata->vif.cfg.assoc = false;
4150
4151	sdata->deflink.u.mgd.p2p_noa_index = -`1`;
4152	memset(s: &sdata->vif.bss_conf.p2p_noa_attr, c: `0`,
4153	n: sizeof(sdata->vif.bss_conf.p2p_noa_attr));
4154
4155	/ on the next assoc, re-program HT/VHT parameters /
4156	memset(s: &ifmgd->ht_capa, c: `0`, n: sizeof(ifmgd->ht_capa));
4157	memset(s: &ifmgd->ht_capa_mask, c: `0`, n: sizeof(ifmgd->ht_capa_mask));
4158	memset(s: &ifmgd->vht_capa, c: `0`, n: sizeof(ifmgd->vht_capa));
4159	memset(s: &ifmgd->vht_capa_mask, c: `0`, n: sizeof(ifmgd->vht_capa_mask));
4160
4161	/*
4162	* reset MU-MIMO ownership and group data in default link,
4163	* if used, other links are destroyed
4164	*/
4165	memset(s: sdata->vif.bss_conf.mu_group.membership, c: `0`,
4166	n: sizeof(sdata->vif.bss_conf.mu_group.membership));
4167	memset(s: sdata->vif.bss_conf.mu_group.position, c: `0`,
4168	n: sizeof(sdata->vif.bss_conf.mu_group.position));
4169	if (!ieee80211_vif_is_mld(vif: &sdata->vif))
4170	changed \|= BSS_CHANGED_MU_GROUPS;
4171	sdata->vif.bss_conf.mu_mimo_owner = false;
4172
4173	sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
4174
4175	timer_delete_sync(timer: &local->dynamic_ps_timer);
4176	wiphy_work_cancel(wiphy: local->hw.wiphy, work: &local->dynamic_ps_enable_work);
4177
4178	/ Disable ARP filtering /
4179	if (sdata->vif.cfg.arp_addr_cnt)
4180	changed \|= BSS_CHANGED_ARP_FILTER;
4181
4182	sdata->vif.bss_conf.qos = false;
4183	if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
4184	changed \|= BSS_CHANGED_QOS;
4185	/ The BSSID (not really interesting) and HT changed /
4186	changed \|= BSS_CHANGED_BSSID \| BSS_CHANGED_HT;
4187	ieee80211_bss_info_change_notify(sdata, changed);
4188	} else {
4189	ieee80211_vif_cfg_change_notify(sdata, changed);
4190	}
4191
4192	if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) {
4193	/*
4194	* After notifying the driver about the disassoc,
4195	* remove the ap sta.
4196	*/
4197	sta_info_flush(sdata, link_id: -`1`);
4198	}
4199
4200	/ disassociated - set to defaults now /
4201	ieee80211_set_wmm_default(link: &sdata->deflink, bss_notify: false, enable_qos: false);
4202
4203	timer_delete_sync(timer: &sdata->u.mgd.conn_mon_timer);
4204	timer_delete_sync(timer: &sdata->u.mgd.bcn_mon_timer);
4205	timer_delete_sync(timer: &sdata->u.mgd.timer);
4206
4207	sdata->vif.bss_conf.dtim_period = `0`;
4208	sdata->vif.bss_conf.beacon_rate = NULL;
4209
4210	sdata->deflink.u.mgd.have_beacon = false;
4211	sdata->deflink.u.mgd.tracking_signal_avg = false;
4212	sdata->deflink.u.mgd.disable_wmm_tracking = false;
4213
4214	ifmgd->flags = `0`;
4215
4216	for (link_id = `0`; link_id < ARRAY_SIZE(sdata->link); link_id++) {
4217	struct ieee80211_link_data *link;
4218
4219	link = sdata_dereference(sdata->link[link_id], sdata);
4220	if (!link)
4221	continue;
4222	ieee80211_link_release_channel(link);
4223	}
4224
4225	sdata->vif.bss_conf.csa_active = false;
4226	sdata->deflink.u.mgd.csa.blocked_tx = false;
4227	sdata->deflink.u.mgd.csa.waiting_bcn = false;
4228	sdata->deflink.u.mgd.csa.ignored_same_chan = false;
4229	ieee80211_vif_unblock_queues_csa(sdata);
4230
4231	/ existing TX TSPEC sessions no longer exist /
4232	memset(s: ifmgd->tx_tspec, c: `0`, n: sizeof(ifmgd->tx_tspec));
4233	wiphy_delayed_work_cancel(wiphy: local->hw.wiphy, dwork: &ifmgd->tx_tspec_wk);
4234
4235	sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP;
4236	sdata->vif.bss_conf.pwr_reduction = `0`;
4237	ieee80211_clear_tpe(tpe: &sdata->vif.bss_conf.tpe);
4238
4239	sdata->vif.cfg.eml_cap = `0`;
4240	sdata->vif.cfg.eml_med_sync_delay = `0`;
4241	sdata->vif.cfg.mld_capa_op = `0`;
4242
4243	memset(s: &sdata->u.mgd.ttlm_info, c: `0`,
4244	n: sizeof(sdata->u.mgd.ttlm_info));
4245	wiphy_delayed_work_cancel(wiphy: sdata->local->hw.wiphy, dwork: &ifmgd->ttlm_work);
4246
4247	memset(s: &sdata->vif.neg_ttlm, c: `0`, n: sizeof(sdata->vif.neg_ttlm));
4248	wiphy_delayed_work_cancel(wiphy: sdata->local->hw.wiphy,
4249	dwork: &ifmgd->neg_ttlm_timeout_work);
4250
4251	sdata->u.mgd.removed_links = `0`;
4252	wiphy_delayed_work_cancel(wiphy: sdata->local->hw.wiphy,
4253	dwork: &sdata->u.mgd.ml_reconf_work);
4254
4255	wiphy_work_cancel(wiphy: sdata->local->hw.wiphy,
4256	work: &ifmgd->teardown_ttlm_work);
4257
4258	/ if disconnection happens in the middle of the ML reconfiguration*
4259	* flow, cfg80211 must called to release the BSS references obtained
4260	* when the flow started.
4261	*/
4262	ieee80211_ml_reconf_reset(sdata);
4263
4264	ieee80211_vif_set_links(sdata, new_links: `0`, dormant_links: `0`);
4265
4266	ifmgd->mcast_seq_last = IEEE80211_SN_MODULO;
4267
4268	ifmgd->epcs.enabled = false;
4269	ifmgd->epcs.dialog_token = `0`;
4270
4271	memset(s: ifmgd->userspace_selectors, c: `0`,
4272	n: sizeof(ifmgd->userspace_selectors));
4273	}
4274
4275	static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
4276	{
4277	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4278	struct ieee80211_local *local = sdata->local;
4279
4280	lockdep_assert_wiphy(local->hw.wiphy);
4281
4282	if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
4283	return;
4284
4285	__ieee80211_stop_poll(sdata);
4286
4287	ieee80211_recalc_ps(local);
4288
4289	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4290	return;
4291
4292	/*
4293	* We've received a probe response, but are not sure whether
4294	* we have or will be receiving any beacons or data, so let's
4295	* schedule the timers again, just in case.
4296	*/
4297	ieee80211_sta_reset_beacon_monitor(sdata);
4298
4299	mod_timer(timer: &ifmgd->conn_mon_timer,
4300	expires: round_jiffies_up(j: jiffies +
4301	IEEE80211_CONNECTION_IDLE_TIME));
4302	}
4303
4304	static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
4305	struct ieee80211_hdr *hdr,
4306	u16 tx_time)
4307	{
4308	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4309	u16 tid;
4310	int ac;
4311	struct ieee80211_sta_tx_tspec *tx_tspec;
4312	unsigned long now = jiffies;
4313
4314	if (!ieee80211_is_data_qos(fc: hdr->frame_control))
4315	return;
4316
4317	tid = ieee80211_get_tid(hdr);
4318	ac = ieee80211_ac_from_tid(tid);
4319	tx_tspec = &ifmgd->tx_tspec[ac];
4320
4321	if (likely(!tx_tspec->admitted_time))
4322	return;
4323
4324	if (time_after(now, tx_tspec->time_slice_start + HZ)) {
4325	tx_tspec->consumed_tx_time = `0`;
4326	tx_tspec->time_slice_start = now;
4327
4328	if (tx_tspec->downgraded) {
4329	tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
4330	wiphy_delayed_work_queue(wiphy: sdata->local->hw.wiphy,
4331	dwork: &ifmgd->tx_tspec_wk, delay: `0`);
4332	}
4333	}
4334
4335	if (tx_tspec->downgraded)
4336	return;
4337
4338	tx_tspec->consumed_tx_time += tx_time;
4339
4340	if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
4341	tx_tspec->downgraded = true;
4342	tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
4343	wiphy_delayed_work_queue(wiphy: sdata->local->hw.wiphy,
4344	dwork: &ifmgd->tx_tspec_wk, delay: `0`);
4345	}
4346	}
4347
4348	void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
4349	struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4350	{
4351	ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
4352
4353	if (!ieee80211_is_any_nullfunc(fc: hdr->frame_control) \|\|
4354	!sdata->u.mgd.probe_send_count)
4355	return;
4356
4357	if (ack)
4358	sdata->u.mgd.probe_send_count = `0`;
4359	else
4360	sdata->u.mgd.nullfunc_failed = true;
4361	wiphy_work_queue(wiphy: sdata->local->hw.wiphy, work: &sdata->work);
4362	}
4363
4364	static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
4365	const u8 src, const* u8 *dst,
4366	const u8 *ssid, size_t ssid_len,
4367	struct ieee80211_channel *channel)
4368	{
4369	struct sk_buff *skb;
4370
4371	skb = ieee80211_build_probe_req(sdata, src, dst, ratemask: (u32)-`1`, chan: channel,
4372	ssid, ssid_len, NULL, ie_len: `0`,
4373	flags: IEEE80211_PROBE_FLAG_DIRECTED);
4374	if (skb)
4375	ieee80211_tx_skb(sdata, skb);
4376	}
4377
4378	static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
4379	{
4380	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4381	u8 *dst = sdata->vif.cfg.ap_addr;
4382	u8 unicast_limit = max(`1`, max_probe_tries - `3`);
4383	struct sta_info *sta;
4384
4385	lockdep_assert_wiphy(sdata->local->hw.wiphy);
4386
4387	/*
4388	* Try sending broadcast probe requests for the last three
4389	* probe requests after the first ones failed since some
4390	* buggy APs only support broadcast probe requests.
4391	*/
4392	if (ifmgd->probe_send_count >= unicast_limit)
4393	dst = NULL;
4394
4395	/*
4396	* When the hardware reports an accurate Tx ACK status, it's
4397	* better to send a nullfunc frame instead of a probe request,
4398	* as it will kick us off the AP quickly if we aren't associated
4399	* anymore. The timeout will be reset if the frame is ACKed by
4400	* the AP.
4401	*/
4402	ifmgd->probe_send_count++;
4403
4404	if (dst) {
4405	sta = sta_info_get(sdata, addr: dst);
4406	if (!WARN_ON(!sta))
4407	ieee80211_check_fast_rx(sta);
4408	}
4409
4410	if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
4411	ifmgd->nullfunc_failed = false;
4412	ieee80211_send_nullfunc(local: sdata->local, sdata, powersave: false);
4413	} else {
4414	ieee80211_mlme_send_probe_req(sdata, src: sdata->vif.addr, dst,
4415	ssid: sdata->vif.cfg.ssid,
4416	ssid_len: sdata->vif.cfg.ssid_len,
4417	channel: sdata->deflink.conf->bss->channel);
4418	}
4419
4420	ifmgd->probe_timeout = jiffies + msecs_to_jiffies(m: probe_wait_ms);
4421	run_again(sdata, timeout: ifmgd->probe_timeout);
4422	}
4423
4424	static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
4425	bool beacon)
4426	{
4427	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4428	bool already = false;
4429
4430	lockdep_assert_wiphy(sdata->local->hw.wiphy);
4431
4432	if (!ieee80211_sdata_running(sdata))
4433	return;
4434
4435	if (!ifmgd->associated)
4436	return;
4437
4438	if (sdata->local->tmp_channel \|\| sdata->local->scanning)
4439	return;
4440
4441	if (sdata->local->suspending) {
4442	/ reschedule after resume /
4443	ieee80211_reset_ap_probe(sdata);
4444	return;
4445	}
4446
4447	if (beacon) {
4448	mlme_dbg_ratelimited(sdata,
4449	"detected beacon loss from AP (missed %d beacons) - probing\n",
4450	beacon_loss_count);
4451
4452	ieee80211_cqm_beacon_loss_notify(vif: &sdata->vif, GFP_KERNEL);
4453	}
4454
4455	/*
4456	* The driver/our work has already reported this event or the
4457	* connection monitoring has kicked in and we have already sent
4458	* a probe request. Or maybe the AP died and the driver keeps
4459	* reporting until we disassociate...
4460	*
4461	* In either case we have to ignore the current call to this
4462	* function (except for setting the correct probe reason bit)
4463	* because otherwise we would reset the timer every time and
4464	* never check whether we received a probe response!
4465	*/
4466	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
4467	already = true;
4468
4469	ifmgd->flags \|= IEEE80211_STA_CONNECTION_POLL;
4470
4471	if (already)
4472	return;
4473
4474	ieee80211_recalc_ps(local: sdata->local);
4475
4476	ifmgd->probe_send_count = `0`;
4477	ieee80211_mgd_probe_ap_send(sdata);
4478	}
4479
4480	struct sk_buff ieee80211_ap_probereq_get(struct* ieee80211_hw *hw,
4481	struct ieee80211_vif *vif)
4482	{
4483	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
4484	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4485	struct cfg80211_bss *cbss;
4486	struct sk_buff *skb;
4487	const struct element *ssid;
4488	int ssid_len;
4489
4490	lockdep_assert_wiphy(sdata->local->hw.wiphy);
4491
4492	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION \|\|
4493	ieee80211_vif_is_mld(&sdata->vif)))
4494	return NULL;
4495
4496	if (ifmgd->associated)
4497	cbss = sdata->deflink.conf->bss;
4498	else if (ifmgd->auth_data)
4499	cbss = ifmgd->auth_data->bss;
4500	else if (ifmgd->assoc_data && ifmgd->assoc_data->link[`0`].bss)
4501	cbss = ifmgd->assoc_data->link[`0`].bss;
4502	else
4503	return NULL;
4504
4505	rcu_read_lock();
4506	ssid = ieee80211_bss_get_elem(bss: cbss, id: WLAN_EID_SSID);
4507	if (WARN_ONCE(!ssid \|\| ssid->datalen > IEEE80211_MAX_SSID_LEN,
4508	"invalid SSID element (len=%d)",
4509	ssid ? ssid->datalen : -`1`))
4510	ssid_len = `0`;
4511	else
4512	ssid_len = ssid->datalen;
4513
4514	skb = ieee80211_build_probe_req(sdata, src: sdata->vif.addr, dst: cbss->bssid,
4515	ratemask: (u32) -`1`, chan: cbss->channel,
4516	ssid: ssid->data, ssid_len,
4517	NULL, ie_len: `0`, flags: IEEE80211_PROBE_FLAG_DIRECTED);
4518	rcu_read_unlock();
4519
4520	return skb;
4521	}
4522	EXPORT_SYMBOL(ieee80211_ap_probereq_get);
4523
4524	static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
4525	const u8 *buf, size_t len, bool tx,
4526	u16 reason, bool reconnect)
4527	{
4528	struct ieee80211_event event = {
4529	.type = MLME_EVENT,
4530	.u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
4531	.u.mlme.reason = reason,
4532	};
4533
4534	if (tx)
4535	cfg80211_tx_mlme_mgmt(dev: sdata->dev, buf, len, reconnect);
4536	else
4537	cfg80211_rx_mlme_mgmt(dev: sdata->dev, buf, len);
4538
4539	drv_event_callback(local: sdata->local, sdata, event: &event);
4540	}
4541
4542	static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
4543	{
4544	struct ieee80211_local *local = sdata->local;
4545	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4546	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4547
4548	lockdep_assert_wiphy(local->hw.wiphy);
4549
4550	if (!ifmgd->associated)
4551	return;
4552
4553	if (!ifmgd->driver_disconnect) {
4554	unsigned int link_id;
4555
4556	/*
4557	* AP is probably out of range (or not reachable for another
4558	* reason) so remove the bss structs for that AP. In the case
4559	* of multi-link, it's not clear that all of them really are
4560	* out of range, but if they weren't the driver likely would
4561	* have switched to just have a single link active?
4562	*/
4563	for (link_id = `0`;
4564	link_id < ARRAY_SIZE(sdata->link);
4565	link_id++) {
4566	struct ieee80211_link_data *link;
4567
4568	link = sdata_dereference(sdata->link[link_id], sdata);
4569	if (!link \|\| !link->conf->bss)
4570	continue;
4571	cfg80211_unlink_bss(wiphy: local->hw.wiphy, bss: link->conf->bss);
4572	link->conf->bss = NULL;
4573	}
4574	}
4575
4576	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4577	reason: ifmgd->driver_disconnect ?
4578	WLAN_REASON_DEAUTH_LEAVING :
4579	WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4580	tx: true, frame_buf);
4581	/ the other links will be destroyed /
4582	sdata->vif.bss_conf.csa_active = false;
4583	sdata->deflink.u.mgd.csa.waiting_bcn = false;
4584	sdata->deflink.u.mgd.csa.blocked_tx = false;
4585	ieee80211_vif_unblock_queues_csa(sdata);
4586
4587	ieee80211_report_disconnect(sdata, buf: frame_buf, len: sizeof(frame_buf), tx: true,
4588	reason: WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4589	reconnect: ifmgd->reconnect);
4590	ifmgd->reconnect = false;
4591	}
4592
4593	static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy,
4594	struct wiphy_work *work)
4595	{
4596	struct ieee80211_sub_if_data *sdata =
4597	container_of(work, struct ieee80211_sub_if_data,
4598	u.mgd.beacon_connection_loss_work);
4599	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4600
4601	if (ifmgd->connection_loss) {
4602	sdata_info(sdata, "Connection to AP %pM lost\n",
4603	sdata->vif.cfg.ap_addr);
4604	__ieee80211_disconnect(sdata);
4605	ifmgd->connection_loss = false;
4606	} else if (ifmgd->driver_disconnect) {
4607	sdata_info(sdata,
4608	"Driver requested disconnection from AP %pM\n",
4609	sdata->vif.cfg.ap_addr);
4610	__ieee80211_disconnect(sdata);
4611	ifmgd->driver_disconnect = false;
4612	} else {
4613	if (ifmgd->associated)
4614	sdata->deflink.u.mgd.beacon_loss_count++;
4615	ieee80211_mgd_probe_ap(sdata, beacon: true);
4616	}
4617	}
4618
4619	static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy,
4620	struct wiphy_work *work)
4621	{
4622	struct ieee80211_sub_if_data *sdata =
4623	container_of(work, struct ieee80211_sub_if_data,
4624	u.mgd.csa_connection_drop_work);
4625
4626	__ieee80211_disconnect(sdata);
4627	}
4628
4629	void ieee80211_beacon_loss(struct ieee80211_vif *vif)
4630	{
4631	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
4632	struct ieee80211_hw *hw = &sdata->local->hw;
4633
4634	trace_api_beacon_loss(sdata);
4635
4636	sdata->u.mgd.connection_loss = false;
4637	wiphy_work_queue(wiphy: hw->wiphy, work: &sdata->u.mgd.beacon_connection_loss_work);
4638	}
4639	EXPORT_SYMBOL(ieee80211_beacon_loss);
4640
4641	void ieee80211_connection_loss(struct ieee80211_vif *vif)
4642	{
4643	struct ieee80211_sub_if_data *sdata;
4644	struct ieee80211_hw *hw;
4645
4646	KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif);
4647
4648	sdata = vif_to_sdata(p: vif);
4649	hw = &sdata->local->hw;
4650
4651	trace_api_connection_loss(sdata);
4652
4653	sdata->u.mgd.connection_loss = true;
4654	wiphy_work_queue(wiphy: hw->wiphy, work: &sdata->u.mgd.beacon_connection_loss_work);
4655	}
4656	EXPORT_SYMBOL(ieee80211_connection_loss);
4657
4658	void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect)
4659	{
4660	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
4661	struct ieee80211_hw *hw = &sdata->local->hw;
4662
4663	trace_api_disconnect(sdata, reconnect);
4664
4665	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4666	return;
4667
4668	sdata->u.mgd.driver_disconnect = true;
4669	sdata->u.mgd.reconnect = reconnect;
4670	wiphy_work_queue(wiphy: hw->wiphy, work: &sdata->u.mgd.beacon_connection_loss_work);
4671	}
4672	EXPORT_SYMBOL(ieee80211_disconnect);
4673
4674	static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
4675	bool assoc)
4676	{
4677	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
4678
4679	lockdep_assert_wiphy(sdata->local->hw.wiphy);
4680
4681	sdata->u.mgd.auth_data = NULL;
4682
4683	if (!assoc) {
4684	/*
4685	* we are not authenticated yet, the only timer that could be
4686	* running is the timeout for the authentication response which
4687	* which is not relevant anymore.
4688	*/
4689	timer_delete_sync(timer: &sdata->u.mgd.timer);
4690	sta_info_destroy_addr(sdata, addr: auth_data->ap_addr);
4691
4692	/ other links are destroyed /
4693	eth_zero_addr(addr: sdata->deflink.u.mgd.bssid);
4694	ieee80211_link_info_change_notify(sdata, link: &sdata->deflink,
4695	changed: BSS_CHANGED_BSSID);
4696	sdata->u.mgd.flags = `0`;
4697
4698	ieee80211_link_release_channel(link: &sdata->deflink);
4699	ieee80211_vif_set_links(sdata, new_links: `0`, dormant_links: `0`);
4700	}
4701
4702	cfg80211_put_bss(wiphy: sdata->local->hw.wiphy, bss: auth_data->bss);
4703	kfree(objp: auth_data);
4704	}
4705
4706	enum assoc_status {
4707	ASSOC_SUCCESS,
4708	ASSOC_REJECTED,
4709	ASSOC_TIMEOUT,
4710	ASSOC_ABANDON,
4711	};
4712
4713	static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
4714	enum assoc_status status)
4715	{
4716	struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4717
4718	lockdep_assert_wiphy(sdata->local->hw.wiphy);
4719
4720	sdata->u.mgd.assoc_data = NULL;
4721
4722	if (status != ASSOC_SUCCESS) {
4723	/*
4724	* we are not associated yet, the only timer that could be
4725	* running is the timeout for the association response which
4726	* which is not relevant anymore.
4727	*/
4728	timer_delete_sync(timer: &sdata->u.mgd.timer);
4729	sta_info_destroy_addr(sdata, addr: assoc_data->ap_addr);
4730
4731	eth_zero_addr(addr: sdata->deflink.u.mgd.bssid);
4732	ieee80211_link_info_change_notify(sdata, link: &sdata->deflink,
4733	changed: BSS_CHANGED_BSSID);
4734	sdata->u.mgd.flags = `0`;
4735	sdata->vif.bss_conf.mu_mimo_owner = false;
4736
4737	if (status != ASSOC_REJECTED) {
4738	struct cfg80211_assoc_failure data = {
4739	.timeout = status == ASSOC_TIMEOUT,
4740	};
4741	int i;
4742
4743	BUILD_BUG_ON(ARRAY_SIZE(data.bss) !=
4744	ARRAY_SIZE(assoc_data->link));
4745
4746	for (i = `0`; i < ARRAY_SIZE(data.bss); i++)
4747	data.bss[i] = assoc_data->link[i].bss;
4748
4749	if (ieee80211_vif_is_mld(vif: &sdata->vif))
4750	data.ap_mld_addr = assoc_data->ap_addr;
4751
4752	cfg80211_assoc_failure(dev: sdata->dev, data: &data);
4753	}
4754
4755	ieee80211_link_release_channel(link: &sdata->deflink);
4756	ieee80211_vif_set_links(sdata, new_links: `0`, dormant_links: `0`);
4757	}
4758
4759	kfree(objp: assoc_data);
4760	}
4761
4762	static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
4763	struct ieee80211_mgmt *mgmt, size_t len)
4764	{
4765	struct ieee80211_local *local = sdata->local;
4766	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
4767	const struct element *challenge;
4768	u8 *pos;
4769	u32 tx_flags = `0`;
4770	struct ieee80211_prep_tx_info info = {
4771	.subtype = IEEE80211_STYPE_AUTH,
4772	.link_id = auth_data->link_id,
4773	};
4774
4775	pos = mgmt->u.auth.variable;
4776	challenge = cfg80211_find_elem(eid: WLAN_EID_CHALLENGE, ies: pos,
4777	len: len - (pos - (u8 *)mgmt));
4778	if (!challenge)
4779	return;
4780	auth_data->expected_transaction = `4`;
4781	drv_mgd_prepare_tx(local: sdata->local, sdata, info: &info);
4782	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4783	tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS \|
4784	IEEE80211_TX_INTFL_MLME_CONN_TX;
4785	ieee80211_send_auth(sdata, transaction: `3`, auth_alg: auth_data->algorithm, status: `0`,
4786	extra: (void *)challenge,
4787	extra_len: challenge->datalen + sizeof(*challenge),
4788	bssid: auth_data->ap_addr, da: auth_data->ap_addr,
4789	key: auth_data->key, key_len: auth_data->key_len,
4790	key_idx: auth_data->key_idx, tx_flags);
4791	}
4792
4793	static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata)
4794	{
4795	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4796	const u8 *ap_addr = ifmgd->auth_data->ap_addr;
4797	struct sta_info *sta;
4798
4799	lockdep_assert_wiphy(sdata->local->hw.wiphy);
4800
4801	sdata_info(sdata, "authenticated\n");
4802	ifmgd->auth_data->done = true;
4803	ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
4804	ifmgd->auth_data->timeout_started = true;
4805	run_again(sdata, timeout: ifmgd->auth_data->timeout);
4806
4807	/ move station state to auth /
4808	sta = sta_info_get(sdata, addr: ap_addr);
4809	if (!sta) {
4810	WARN_ONCE(`1`, "%s: STA %pM not found", sdata->name, ap_addr);
4811	return false;
4812	}
4813	if (sta_info_move_state(sta, new_state: IEEE80211_STA_AUTH)) {
4814	sdata_info(sdata, "failed moving %pM to auth\n", ap_addr);
4815	return false;
4816	}
4817
4818	return true;
4819	}
4820
4821	static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
4822	struct ieee80211_mgmt *mgmt, size_t len)
4823	{
4824	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4825	u16 auth_alg, auth_transaction, status_code;
4826	struct ieee80211_event event = {
4827	.type = MLME_EVENT,
4828	.u.mlme.data = AUTH_EVENT,
4829	};
4830	struct ieee80211_prep_tx_info info = {
4831	.subtype = IEEE80211_STYPE_AUTH,
4832	};
4833	bool sae_need_confirm = false;
4834
4835	lockdep_assert_wiphy(sdata->local->hw.wiphy);
4836
4837	if (len < `24` + `6`)
4838	return;
4839
4840	if (!ifmgd->auth_data \|\| ifmgd->auth_data->done)
4841	return;
4842
4843	if (!ether_addr_equal(addr1: ifmgd->auth_data->ap_addr, addr2: mgmt->bssid))
4844	return;
4845
4846	auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
4847	auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
4848	status_code = le16_to_cpu(mgmt->u.auth.status_code);
4849
4850	info.link_id = ifmgd->auth_data->link_id;
4851
4852	if (auth_alg != ifmgd->auth_data->algorithm \|\|
4853	(auth_alg != WLAN_AUTH_SAE &&
4854	auth_transaction != ifmgd->auth_data->expected_transaction) \|\|
4855	(auth_alg == WLAN_AUTH_SAE &&
4856	(auth_transaction < ifmgd->auth_data->expected_transaction \|\|
4857	auth_transaction > `2`))) {
4858	sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
4859	mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
4860	auth_transaction,
4861	ifmgd->auth_data->expected_transaction);
4862	goto notify_driver;
4863	}
4864
4865	if (status_code != WLAN_STATUS_SUCCESS) {
4866	cfg80211_rx_mlme_mgmt(dev: sdata->dev, buf: (u8 *)mgmt, len);
4867
4868	if (auth_alg == WLAN_AUTH_SAE &&
4869	(status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED \|\|
4870	(auth_transaction == `1` &&
4871	(status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT \|\|
4872	status_code == WLAN_STATUS_SAE_PK)))) {
4873	/ waiting for userspace now /
4874	ifmgd->auth_data->waiting = true;
4875	ifmgd->auth_data->timeout =
4876	jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY;
4877	ifmgd->auth_data->timeout_started = true;
4878	run_again(sdata, timeout: ifmgd->auth_data->timeout);
4879	if (auth_transaction == `1`)
4880	sae_need_confirm = true;
4881	goto notify_driver;
4882	}
4883
4884	sdata_info(sdata, "%pM denied authentication (status %d)\n",
4885	mgmt->sa, status_code);
4886	ieee80211_destroy_auth_data(sdata, assoc: false);
4887	event.u.mlme.status = MLME_DENIED;
4888	event.u.mlme.reason = status_code;
4889	drv_event_callback(local: sdata->local, sdata, event: &event);
4890	goto notify_driver;
4891	}
4892
4893	switch (ifmgd->auth_data->algorithm) {
4894	case WLAN_AUTH_OPEN:
4895	case WLAN_AUTH_LEAP:
4896	case WLAN_AUTH_FT:
4897	case WLAN_AUTH_SAE:
4898	case WLAN_AUTH_FILS_SK:
4899	case WLAN_AUTH_FILS_SK_PFS:
4900	case WLAN_AUTH_FILS_PK:
4901	break;
4902	case WLAN_AUTH_SHARED_KEY:
4903	if (ifmgd->auth_data->expected_transaction != `4`) {
4904	ieee80211_auth_challenge(sdata, mgmt, len);
4905	/ need another frame /
4906	return;
4907	}
4908	break;
4909	default:
4910	WARN_ONCE(`1`, "invalid auth alg %d",
4911	ifmgd->auth_data->algorithm);
4912	goto notify_driver;
4913	}
4914
4915	event.u.mlme.status = MLME_SUCCESS;
4916	info.success = `1`;
4917	drv_event_callback(local: sdata->local, sdata, event: &event);
4918	if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE \|\|
4919	(auth_transaction == `2` &&
4920	ifmgd->auth_data->expected_transaction == `2`)) {
4921	if (!ieee80211_mark_sta_auth(sdata))
4922	return; / ignore frame -- wait for timeout /
4923	} else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
4924	auth_transaction == `1`) {
4925	sae_need_confirm = true;
4926	} else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
4927	auth_transaction == `2`) {
4928	sdata_info(sdata, "SAE peer confirmed\n");
4929	ifmgd->auth_data->peer_confirmed = true;
4930	}
4931
4932	cfg80211_rx_mlme_mgmt(dev: sdata->dev, buf: (u8 *)mgmt, len);
4933	notify_driver:
4934	if (!sae_need_confirm)
4935	drv_mgd_complete_tx(local: sdata->local, sdata, info: &info);
4936	}
4937
4938	#define case_WLAN(type) \
4939	case WLAN_REASON_##type: return #type
4940
4941	const char *ieee80211_get_reason_code_string(u16 reason_code)
4942	{
4943	switch (reason_code) {
4944	case_WLAN(UNSPECIFIED);
4945	case_WLAN(PREV_AUTH_NOT_VALID);
4946	case_WLAN(DEAUTH_LEAVING);
4947	case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
4948	case_WLAN(DISASSOC_AP_BUSY);
4949	case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
4950	case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
4951	case_WLAN(DISASSOC_STA_HAS_LEFT);
4952	case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
4953	case_WLAN(DISASSOC_BAD_POWER);
4954	case_WLAN(DISASSOC_BAD_SUPP_CHAN);
4955	case_WLAN(INVALID_IE);
4956	case_WLAN(MIC_FAILURE);
4957	case_WLAN(`4WAY_HANDSHAKE_TIMEOUT`);
4958	case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
4959	case_WLAN(IE_DIFFERENT);
4960	case_WLAN(INVALID_GROUP_CIPHER);
4961	case_WLAN(INVALID_PAIRWISE_CIPHER);
4962	case_WLAN(INVALID_AKMP);
4963	case_WLAN(UNSUPP_RSN_VERSION);
4964	case_WLAN(INVALID_RSN_IE_CAP);
4965	case_WLAN(IEEE8021X_FAILED);
4966	case_WLAN(CIPHER_SUITE_REJECTED);
4967	case_WLAN(DISASSOC_UNSPECIFIED_QOS);
4968	case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
4969	case_WLAN(DISASSOC_LOW_ACK);
4970	case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
4971	case_WLAN(QSTA_LEAVE_QBSS);
4972	case_WLAN(QSTA_NOT_USE);
4973	case_WLAN(QSTA_REQUIRE_SETUP);
4974	case_WLAN(QSTA_TIMEOUT);
4975	case_WLAN(QSTA_CIPHER_NOT_SUPP);
4976	case_WLAN(MESH_PEER_CANCELED);
4977	case_WLAN(MESH_MAX_PEERS);
4978	case_WLAN(MESH_CONFIG);
4979	case_WLAN(MESH_CLOSE);
4980	case_WLAN(MESH_MAX_RETRIES);
4981	case_WLAN(MESH_CONFIRM_TIMEOUT);
4982	case_WLAN(MESH_INVALID_GTK);
4983	case_WLAN(MESH_INCONSISTENT_PARAM);
4984	case_WLAN(MESH_INVALID_SECURITY);
4985	case_WLAN(MESH_PATH_ERROR);
4986	case_WLAN(MESH_PATH_NOFORWARD);
4987	case_WLAN(MESH_PATH_DEST_UNREACHABLE);
4988	case_WLAN(MAC_EXISTS_IN_MBSS);
4989	case_WLAN(MESH_CHAN_REGULATORY);
4990	case_WLAN(MESH_CHAN);
4991	default: return "<unknown>";
4992	}
4993	}
4994
4995	static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
4996	struct ieee80211_mgmt *mgmt, size_t len)
4997	{
4998	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4999	u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
5000
5001	lockdep_assert_wiphy(sdata->local->hw.wiphy);
5002
5003	if (len < `24` + `2`)
5004	return;
5005
5006	if (!ether_addr_equal(addr1: mgmt->bssid, addr2: mgmt->sa)) {
5007	ieee80211_tdls_handle_disconnect(sdata, peer: mgmt->sa, reason: reason_code);
5008	return;
5009	}
5010
5011	if (ifmgd->associated &&
5012	ether_addr_equal(addr1: mgmt->bssid, addr2: sdata->vif.cfg.ap_addr)) {
5013	sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
5014	sdata->vif.cfg.ap_addr, reason_code,
5015	ieee80211_get_reason_code_string(reason_code));
5016
5017	ieee80211_set_disassoc(sdata, stype: `0`, reason: `0`, tx: false, NULL);
5018
5019	ieee80211_report_disconnect(sdata, buf: (u8 *)mgmt, len, tx: false,
5020	reason: reason_code, reconnect: false);
5021	return;
5022	}
5023
5024	if (ifmgd->assoc_data &&
5025	ether_addr_equal(addr1: mgmt->bssid, addr2: ifmgd->assoc_data->ap_addr)) {
5026	sdata_info(sdata,
5027	"deauthenticated from %pM while associating (Reason: %u=%s)\n",
5028	ifmgd->assoc_data->ap_addr, reason_code,
5029	ieee80211_get_reason_code_string(reason_code));
5030
5031	ieee80211_destroy_assoc_data(sdata, status: ASSOC_ABANDON);
5032
5033	cfg80211_rx_mlme_mgmt(dev: sdata->dev, buf: (u8 *)mgmt, len);
5034	return;
5035	}
5036	}
5037
5038
5039	static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
5040	struct ieee80211_mgmt *mgmt, size_t len)
5041	{
5042	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5043	u16 reason_code;
5044
5045	lockdep_assert_wiphy(sdata->local->hw.wiphy);
5046
5047	if (len < `24` + `2`)
5048	return;
5049
5050	if (!ifmgd->associated \|\|
5051	!ether_addr_equal(addr1: mgmt->bssid, addr2: sdata->vif.cfg.ap_addr))
5052	return;
5053
5054	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
5055
5056	if (!ether_addr_equal(addr1: mgmt->bssid, addr2: mgmt->sa)) {
5057	ieee80211_tdls_handle_disconnect(sdata, peer: mgmt->sa, reason: reason_code);
5058	return;
5059	}
5060
5061	sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
5062	sdata->vif.cfg.ap_addr, reason_code,
5063	ieee80211_get_reason_code_string(reason_code));
5064
5065	ieee80211_set_disassoc(sdata, stype: `0`, reason: `0`, tx: false, NULL);
5066
5067	ieee80211_report_disconnect(sdata, buf: (u8 *)mgmt, len, tx: false, reason: reason_code,
5068	reconnect: false);
5069	}
5070
5071	static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata,
5072	struct ieee80211_supported_band *sband,
5073	const struct link_sta_info *link_sta,
5074	const struct ieee802_11_elems *elems)
5075	{
5076	const struct ieee80211_sta_he_cap *own_he_cap =
5077	ieee80211_get_he_iftype_cap_vif(sband, vif: &sdata->vif);
5078
5079	if (elems->ext_capab_len < `10`)
5080	return false;
5081
5082	if (!(elems->ext_capab[`9`] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
5083	return false;
5084
5085	return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[`0`] &
5086	IEEE80211_HE_MAC_CAP0_TWT_RES &&
5087	own_he_cap &&
5088	(own_he_cap->he_cap_elem.mac_cap_info[`0`] &
5089	IEEE80211_HE_MAC_CAP0_TWT_REQ);
5090	}
5091
5092	static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
5093	struct ieee80211_supported_band *sband,
5094	struct ieee80211_link_data *link,
5095	struct link_sta_info *link_sta,
5096	struct ieee802_11_elems *elems)
5097	{
5098	bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems);
5099
5100	if (link->conf->twt_requester != twt) {
5101	link->conf->twt_requester = twt;
5102	return BSS_CHANGED_TWT;
5103	}
5104	return `0`;
5105	}
5106
5107	static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata,
5108	struct ieee80211_bss_conf *bss_conf,
5109	struct ieee80211_supported_band *sband,
5110	struct link_sta_info *link_sta)
5111	{
5112	const struct ieee80211_sta_he_cap *own_he_cap =
5113	ieee80211_get_he_iftype_cap_vif(sband, vif: &sdata->vif);
5114
5115	return bss_conf->he_support &&
5116	(link_sta->pub->he_cap.he_cap_elem.mac_cap_info[`2`] &
5117	IEEE80211_HE_MAC_CAP2_BCAST_TWT) &&
5118	own_he_cap &&
5119	(own_he_cap->he_cap_elem.mac_cap_info[`2`] &
5120	IEEE80211_HE_MAC_CAP2_BCAST_TWT);
5121	}
5122
5123	static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata,
5124	bool enabled)
5125	{
5126	/ in any case this is called, dialog token should be reset /
5127	sdata->u.mgd.epcs.dialog_token = `0`;
5128
5129	if (sdata->u.mgd.epcs.enabled == enabled)
5130	return;
5131
5132	sdata->u.mgd.epcs.enabled = enabled;
5133	cfg80211_epcs_changed(netdev: sdata->dev, enabled);
5134	}
5135
5136	static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata)
5137	{
5138	struct ieee80211_local *local = sdata->local;
5139	u8 link_id;
5140
5141	if (!sdata->u.mgd.epcs.enabled)
5142	return;
5143
5144	lockdep_assert_wiphy(local->hw.wiphy);
5145
5146	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
5147	struct ieee802_11_elems *elems;
5148	struct ieee80211_link_data *link;
5149	const struct cfg80211_bss_ies *ies;
5150	bool ret;
5151
5152	rcu_read_lock();
5153
5154	link = sdata_dereference(sdata->link[link_id], sdata);
5155	if (!link \|\| !link->conf \|\| !link->conf->bss) {
5156	rcu_read_unlock();
5157	continue;
5158	}
5159
5160	if (link->u.mgd.disable_wmm_tracking) {
5161	rcu_read_unlock();
5162	ieee80211_set_wmm_default(link, bss_notify: false, enable_qos: false);
5163	continue;
5164	}
5165
5166	ies = rcu_dereference(link->conf->bss->beacon_ies);
5167	if (!ies) {
5168	rcu_read_unlock();
5169	ieee80211_set_wmm_default(link, bss_notify: false, enable_qos: false);
5170	continue;
5171	}
5172
5173	elems = ieee802_11_parse_elems(start: ies->data, len: ies->len, action: false,
5174	NULL);
5175	if (!elems) {
5176	rcu_read_unlock();
5177	ieee80211_set_wmm_default(link, bss_notify: false, enable_qos: false);
5178	continue;
5179	}
5180
5181	ret = _ieee80211_sta_wmm_params(local, link,
5182	wmm_param: elems->wmm_param,
5183	wmm_param_len: elems->wmm_param_len,
5184	mu_edca: elems->mu_edca_param_set);
5185
5186	kfree(objp: elems);
5187	rcu_read_unlock();
5188
5189	if (!ret) {
5190	ieee80211_set_wmm_default(link, bss_notify: false, enable_qos: false);
5191	continue;
5192	}
5193
5194	ieee80211_mgd_set_link_qos_params(link);
5195	ieee80211_link_info_change_notify(sdata, link, changed: BSS_CHANGED_QOS);
5196	}
5197	}
5198
5199	static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link,
5200	struct link_sta_info *link_sta,
5201	struct cfg80211_bss *cbss,
5202	struct ieee80211_mgmt *mgmt,
5203	const u8 *elem_start,
5204	unsigned int elem_len,
5205	u64 *changed)
5206	{
5207	struct ieee80211_sub_if_data *sdata = link->sdata;
5208	struct ieee80211_mgd_assoc_data *assoc_data =
5209	sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data;
5210	struct ieee80211_bss_conf *bss_conf = link->conf;
5211	struct ieee80211_local *local = sdata->local;
5212	unsigned int link_id = link->link_id;
5213	struct ieee80211_elems_parse_params parse_params = {
5214	.mode = link->u.mgd.conn.mode,
5215	.start = elem_start,
5216	.len = elem_len,
5217	.link_id = link_id == assoc_data->assoc_link_id ? -`1` : link_id,
5218	.from_ap = true,
5219	};
5220	bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
5221	bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
5222	bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
5223	const struct cfg80211_bss_ies *bss_ies = NULL;
5224	struct ieee80211_supported_band *sband;
5225	struct ieee802_11_elems *elems;
5226	const __le16 prof_bss_param_ch_present =
5227	cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT);
5228	u16 capab_info;
5229	bool ret;
5230
5231	elems = ieee802_11_parse_elems_full(params: &parse_params);
5232	if (!elems)
5233	return false;
5234
5235	if (link_id == assoc_data->assoc_link_id) {
5236	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
5237
5238	/*
5239	* we should not get to this flow unless the association was
5240	* successful, so set the status directly to success
5241	*/
5242	assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS;
5243	if (elems->ml_basic) {
5244	int bss_param_ch_cnt =
5245	ieee80211_mle_get_bss_param_ch_cnt(data: (const void *)elems->ml_basic);
5246
5247	if (bss_param_ch_cnt < `0`) {
5248	ret = false;
5249	goto out;
5250	}
5251	bss_conf->bss_param_ch_cnt = bss_param_ch_cnt;
5252	bss_conf->bss_param_ch_cnt_link_id = link_id;
5253	}
5254	} else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC \|\|
5255	!elems->prof \|\|
5256	!(elems->prof->control & prof_bss_param_ch_present)) {
5257	ret = false;
5258	goto out;
5259	} else {
5260	const u8 *ptr = elems->prof->variable +
5261	elems->prof->sta_info_len - `1`;
5262	int bss_param_ch_cnt;
5263
5264	/*
5265	* During parsing, we validated that these fields exist,
5266	* otherwise elems->prof would have been set to NULL.
5267	*/
5268	capab_info = get_unaligned_le16(p: ptr);
5269	assoc_data->link[link_id].status = get_unaligned_le16(p: ptr + `2`);
5270	bss_param_ch_cnt =
5271	ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(prof: elems->prof);
5272	bss_conf->bss_param_ch_cnt = bss_param_ch_cnt;
5273	bss_conf->bss_param_ch_cnt_link_id = link_id;
5274
5275	if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) {
5276	link_info(link, "association response status code=%u\n",
5277	assoc_data->link[link_id].status);
5278	ret = true;
5279	goto out;
5280	}
5281	}
5282
5283	if (!is_s1g && !elems->supp_rates) {
5284	sdata_info(sdata, "no SuppRates element in AssocResp\n");
5285	ret = false;
5286	goto out;
5287	}
5288
5289	link->u.mgd.tdls_chan_switch_prohibited =
5290	elems->ext_capab && elems->ext_capab_len >= `5` &&
5291	(elems->ext_capab[`4`] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
5292
5293	/*
5294	* Some APs are erroneously not including some information in their
5295	* (re)association response frames. Try to recover by using the data
5296	* from the beacon or probe response. This seems to afflict mobile
5297	* 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
5298	* "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
5299	*/
5300	if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz &&
5301	((assoc_data->wmm && !elems->wmm_param) \|\|
5302	(link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT &&
5303	(!elems->ht_cap_elem \|\| !elems->ht_operation)) \|\|
5304	(is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT &&
5305	(!elems->vht_cap_elem \|\| !elems->vht_operation)))) {
5306	const struct cfg80211_bss_ies *ies;
5307	struct ieee802_11_elems *bss_elems;
5308
5309	rcu_read_lock();
5310	ies = rcu_dereference(cbss->ies);
5311	if (ies)
5312	bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
5313	GFP_ATOMIC);
5314	rcu_read_unlock();
5315	if (!bss_ies) {
5316	ret = false;
5317	goto out;
5318	}
5319
5320	parse_params.start = bss_ies->data;
5321	parse_params.len = bss_ies->len;
5322	parse_params.bss = cbss;
5323	parse_params.link_id = -`1`;
5324	bss_elems = ieee802_11_parse_elems_full(params: &parse_params);
5325	if (!bss_elems) {
5326	ret = false;
5327	goto out;
5328	}
5329
5330	if (assoc_data->wmm &&
5331	!elems->wmm_param && bss_elems->wmm_param) {
5332	elems->wmm_param = bss_elems->wmm_param;
5333	sdata_info(sdata,
5334	"AP bug: WMM param missing from AssocResp\n");
5335	}
5336
5337	/*
5338	* Also check if we requested HT/VHT, otherwise the AP doesn't
5339	* have to include the IEs in the (re)association response.
5340	*/
5341	if (!elems->ht_cap_elem && bss_elems->ht_cap_elem &&
5342	link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) {
5343	elems->ht_cap_elem = bss_elems->ht_cap_elem;
5344	sdata_info(sdata,
5345	"AP bug: HT capability missing from AssocResp\n");
5346	}
5347	if (!elems->ht_operation && bss_elems->ht_operation &&
5348	link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) {
5349	elems->ht_operation = bss_elems->ht_operation;
5350	sdata_info(sdata,
5351	"AP bug: HT operation missing from AssocResp\n");
5352	}
5353
5354	if (is_5ghz) {
5355	if (!elems->vht_cap_elem && bss_elems->vht_cap_elem &&
5356	link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) {
5357	elems->vht_cap_elem = bss_elems->vht_cap_elem;
5358	sdata_info(sdata,
5359	"AP bug: VHT capa missing from AssocResp\n");
5360	}
5361
5362	if (!elems->vht_operation && bss_elems->vht_operation &&
5363	link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) {
5364	elems->vht_operation = bss_elems->vht_operation;
5365	sdata_info(sdata,
5366	"AP bug: VHT operation missing from AssocResp\n");
5367	}
5368	}
5369	kfree(objp: bss_elems);
5370	}
5371
5372	/*
5373	* We previously checked these in the beacon/probe response, so
5374	* they should be present here. This is just a safety net.
5375	* Note that the ieee80211_config_bw() below would also check
5376	* for this (and more), but this has better error reporting.
5377	*/
5378	if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT &&
5379	(!elems->wmm_param \|\| !elems->ht_cap_elem \|\| !elems->ht_operation)) {
5380	sdata_info(sdata,
5381	"HT AP is missing WMM params or HT capability/operation\n");
5382	ret = false;
5383	goto out;
5384	}
5385
5386	if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT &&
5387	(!elems->vht_cap_elem \|\| !elems->vht_operation)) {
5388	sdata_info(sdata,
5389	"VHT AP is missing VHT capability/operation\n");
5390	ret = false;
5391	goto out;
5392	}
5393
5394	/ check/update if AP changed anything in assoc response vs. scan /
5395	if (ieee80211_config_bw(link, elems,
5396	update: link_id == assoc_data->assoc_link_id,
5397	changed,
5398	le16_to_cpu(mgmt->frame_control) &
5399	IEEE80211_FCTL_STYPE)) {
5400	ret = false;
5401	goto out;
5402	}
5403
5404	if (WARN_ON(!link->conf->chanreq.oper.chan)) {
5405	ret = false;
5406	goto out;
5407	}
5408	sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band];
5409
5410	/ Set up internal HT/VHT capabilities /
5411	if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT)
5412	ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
5413	ht_cap_ie: elems->ht_cap_elem,
5414	link_sta);
5415
5416	if (elems->vht_cap_elem &&
5417	link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) {
5418	const struct ieee80211_vht_cap *bss_vht_cap = NULL;
5419	const struct cfg80211_bss_ies *ies;
5420
5421	/*
5422	* Cisco AP module 9115 with FW 17.3 has a bug and sends a
5423	* too large maximum MPDU length in the association response
5424	* (indicating 12k) that it cannot actually process ...
5425	* Work around that.
5426	*/
5427	rcu_read_lock();
5428	ies = rcu_dereference(cbss->ies);
5429	if (ies) {
5430	const struct element *elem;
5431
5432	elem = cfg80211_find_elem(eid: WLAN_EID_VHT_CAPABILITY,
5433	ies: ies->data, len: ies->len);
5434	if (elem && elem->datalen >= sizeof(*bss_vht_cap))
5435	bss_vht_cap = (const void *)elem->data;
5436	}
5437
5438	if (ieee80211_hw_check(&local->hw, STRICT) &&
5439	(!bss_vht_cap \|\| memcmp(bss_vht_cap, elems->vht_cap_elem,
5440	sizeof(*bss_vht_cap)))) {
5441	rcu_read_unlock();
5442	ret = false;
5443	link_info(link, "VHT capabilities mismatch\n");
5444	goto out;
5445	}
5446
5447	ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
5448	vht_cap_ie: elems->vht_cap_elem,
5449	vht_cap_ie2: bss_vht_cap, link_sta);
5450	rcu_read_unlock();
5451	}
5452
5453	if (elems->he_operation &&
5454	link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE &&
5455	elems->he_cap) {
5456	ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
5457	he_cap_ie: elems->he_cap,
5458	he_cap_len: elems->he_cap_len,
5459	he_6ghz_capa: elems->he_6ghz_capa,
5460	link_sta);
5461
5462	bss_conf->he_support = link_sta->pub->he_cap.has_he;
5463	if (elems->rsnx && elems->rsnx_len &&
5464	(elems->rsnx[`0`] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
5465	wiphy_ext_feature_isset(wiphy: local->hw.wiphy,
5466	ftidx: NL80211_EXT_FEATURE_PROTECTED_TWT))
5467	bss_conf->twt_protected = true;
5468	else
5469	bss_conf->twt_protected = false;
5470
5471	*changed \|= ieee80211_recalc_twt_req(sdata, sband, link,
5472	link_sta, elems);
5473
5474	if (elems->eht_operation && elems->eht_cap &&
5475	link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) {
5476	ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
5477	he_cap_ie: elems->he_cap,
5478	he_cap_len: elems->he_cap_len,
5479	eht_cap_ie_elem: elems->eht_cap,
5480	eht_cap_len: elems->eht_cap_len,
5481	link_sta);
5482
5483	bss_conf->eht_support = link_sta->pub->eht_cap.has_eht;
5484	bss_conf->epcs_support = bss_conf->eht_support &&
5485	!!(elems->eht_cap->fixed.mac_cap_info[`0`] &
5486	IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS);
5487
5488	/ EPCS might be already enabled but a new added link*
5489	* does not support EPCS. This should not really happen
5490	* in practice.
5491	*/
5492	if (sdata->u.mgd.epcs.enabled &&
5493	!bss_conf->epcs_support)
5494	ieee80211_epcs_teardown(sdata);
5495	} else {
5496	bss_conf->eht_support = false;
5497	bss_conf->epcs_support = false;
5498	}
5499	} else {
5500	bss_conf->he_support = false;
5501	bss_conf->twt_requester = false;
5502	bss_conf->twt_protected = false;
5503	bss_conf->eht_support = false;
5504	bss_conf->epcs_support = false;
5505	}
5506
5507	if (elems->s1g_oper &&
5508	link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G &&
5509	elems->s1g_capab)
5510	ieee80211_s1g_cap_to_sta_s1g_cap(sdata, s1g_cap_ie: elems->s1g_capab,
5511	link_sta);
5512
5513	bss_conf->twt_broadcast =
5514	ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta);
5515
5516	if (bss_conf->he_support) {
5517	bss_conf->he_bss_color.color =
5518	le32_get_bits(v: elems->he_operation->he_oper_params,
5519	IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
5520	bss_conf->he_bss_color.partial =
5521	le32_get_bits(v: elems->he_operation->he_oper_params,
5522	IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
5523	bss_conf->he_bss_color.enabled =
5524	!le32_get_bits(v: elems->he_operation->he_oper_params,
5525	IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
5526
5527	if (bss_conf->he_bss_color.enabled)
5528	*changed \|= BSS_CHANGED_HE_BSS_COLOR;
5529
5530	bss_conf->htc_trig_based_pkt_ext =
5531	le32_get_bits(v: elems->he_operation->he_oper_params,
5532	IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
5533	bss_conf->frame_time_rts_th =
5534	le32_get_bits(v: elems->he_operation->he_oper_params,
5535	IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
5536
5537	bss_conf->uora_exists = !!elems->uora_element;
5538	if (elems->uora_element)
5539	bss_conf->uora_ocw_range = elems->uora_element[`0`];
5540
5541	ieee80211_he_op_ie_to_bss_conf(vif: &sdata->vif, he_op_ie_elem: elems->he_operation);
5542	ieee80211_he_spr_ie_to_bss_conf(vif: &sdata->vif, he_spr_ie_elem: elems->he_spr);
5543	/ TODO: OPEN: what happens if BSS color disable is set? /
5544	}
5545
5546	if (cbss->transmitted_bss) {
5547	bss_conf->nontransmitted = true;
5548	ether_addr_copy(dst: bss_conf->transmitter_bssid,
5549	src: cbss->transmitted_bss->bssid);
5550	bss_conf->bssid_indicator = cbss->max_bssid_indicator;
5551	bss_conf->bssid_index = cbss->bssid_index;
5552	}
5553
5554	/*
5555	* Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
5556	* in their association response, so ignore that data for our own
5557	* configuration. If it changed since the last beacon, we'll get the
5558	* next beacon and update then.
5559	*/
5560
5561	/*
5562	* If an operating mode notification IE is present, override the
5563	* NSS calculation (that would be done in rate_control_rate_init())
5564	* and use the # of streams from that element.
5565	*/
5566	if (elems->opmode_notif &&
5567	!(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
5568	u8 nss;
5569
5570	nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
5571	nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
5572	nss += `1`;
5573	link_sta->pub->rx_nss = nss;
5574	}
5575
5576	/*
5577	* Always handle WMM once after association regardless
5578	* of the first value the AP uses. Setting -1 here has
5579	* that effect because the AP values is an unsigned
5580	* 4-bit value.
5581	*/
5582	link->u.mgd.wmm_last_param_set = -`1`;
5583	link->u.mgd.mu_edca_last_param_set = -`1`;
5584
5585	if (link->u.mgd.disable_wmm_tracking) {
5586	ieee80211_set_wmm_default(link, bss_notify: false, enable_qos: false);
5587	} else if (!ieee80211_sta_wmm_params(local, link, wmm_param: elems->wmm_param,
5588	wmm_param_len: elems->wmm_param_len,
5589	mu_edca: elems->mu_edca_param_set)) {
5590	/ still enable QoS since we might have HT/VHT /
5591	ieee80211_set_wmm_default(link, bss_notify: false, enable_qos: true);
5592	/ disable WMM tracking in this case to disable*
5593	* tracking WMM parameter changes in the beacon if
5594	* the parameters weren't actually valid. Doing so
5595	* avoids changing parameters very strangely when
5596	* the AP is going back and forth between valid and
5597	* invalid parameters.
5598	*/
5599	link->u.mgd.disable_wmm_tracking = true;
5600	}
5601
5602	if (elems->max_idle_period_ie) {
5603	bss_conf->max_idle_period =
5604	le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
5605	bss_conf->protected_keep_alive =
5606	!!(elems->max_idle_period_ie->idle_options &
5607	WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
5608	*changed \|= BSS_CHANGED_KEEP_ALIVE;
5609	} else {
5610	bss_conf->max_idle_period = `0`;
5611	bss_conf->protected_keep_alive = false;
5612	}
5613
5614	/ set assoc capability (AID was already set earlier),*
5615	* ieee80211_set_associated() will tell the driver */
5616	bss_conf->assoc_capability = capab_info;
5617
5618	ret = true;
5619	out:
5620	kfree(objp: elems);
5621	kfree(objp: bss_ies);
5622	return ret;
5623	}
5624
5625	static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link,
5626	struct sta_info *sta,
5627	struct link_sta_info *link_sta,
5628	struct cfg80211_bss *cbss)
5629	{
5630	struct ieee80211_sub_if_data *sdata = link->sdata;
5631	struct ieee80211_local *local = sdata->local;
5632	struct ieee80211_bss bss = (void* *)cbss->priv;
5633	u32 rates = `0`, basic_rates = `0`;
5634	bool have_higher_than_11mbit = false;
5635	int min_rate = INT_MAX, min_rate_index = -`1`;
5636	struct ieee80211_supported_band *sband;
5637
5638	memcpy(to: link_sta->addr, from: cbss->bssid, ETH_ALEN);
5639	memcpy(to: link_sta->pub->addr, from: cbss->bssid, ETH_ALEN);
5640
5641	/ TODO: S1G Basic Rate Set is expressed elsewhere /
5642	if (cbss->channel->band == NL80211_BAND_S1GHZ) {
5643	ieee80211_s1g_sta_rate_init(sta);
5644	return `0`;
5645	}
5646
5647	sband = local->hw.wiphy->bands[cbss->channel->band];
5648
5649	ieee80211_get_rates(sband, supp_rates: bss->supp_rates, supp_rates_len: bss->supp_rates_len,
5650	NULL, ext_supp_rates_len: `0`,
5651	rates: &rates, basic_rates: &basic_rates, NULL,
5652	have_higher_than_11mbit: &have_higher_than_11mbit,
5653	min_rate: &min_rate, min_rate_index: &min_rate_index);
5654
5655	/*
5656	* This used to be a workaround for basic rates missing
5657	* in the association response frame. Now that we no
5658	* longer use the basic rates from there, it probably
5659	* doesn't happen any more, but keep the workaround so
5660	* in case some other APs are buggy in different ways
5661	* we can connect -- with a warning.
5662	* Allow this workaround only in case the AP provided at least
5663	* one rate.
5664	*/
5665	if (min_rate_index < `0`) {
5666	link_info(link, "No legacy rates in association response\n");
5667	return -EINVAL;
5668	} else if (!basic_rates) {
5669	link_info(link, "No basic rates, using min rate instead\n");
5670	basic_rates = BIT(min_rate_index);
5671	}
5672
5673	if (rates)
5674	link_sta->pub->supp_rates[cbss->channel->band] = rates;
5675	else
5676	link_info(link, "No rates found, keeping mandatory only\n");
5677
5678	link->conf->basic_rates = basic_rates;
5679
5680	/ cf. IEEE 802.11 9.2.12 /
5681	link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ &&
5682	have_higher_than_11mbit;
5683
5684	return `0`;
5685	}
5686
5687	static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link,
5688	struct cfg80211_bss *cbss)
5689	{
5690	struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
5691	const struct element ht_cap_elem, vht_cap_elem;
5692	const struct cfg80211_bss_ies *ies;
5693	const struct ieee80211_ht_cap *ht_cap;
5694	const struct ieee80211_vht_cap *vht_cap;
5695	const struct ieee80211_he_cap_elem *he_cap;
5696	const struct element *he_cap_elem;
5697	u16 mcs_80_map, mcs_160_map;
5698	int i, mcs_nss_size;
5699	bool support_160;
5700	u8 chains = `1`;
5701
5702	if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT)
5703	return chains;
5704
5705	ht_cap_elem = ieee80211_bss_get_elem(bss: cbss, id: WLAN_EID_HT_CAPABILITY);
5706	if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) {
5707	ht_cap = (void *)ht_cap_elem->data;
5708	chains = ieee80211_mcs_to_chains(mcs: &ht_cap->mcs);
5709	/*
5710	* TODO: use "Tx Maximum Number Spatial Streams Supported" and
5711	* "Tx Unequal Modulation Supported" fields.
5712	*/
5713	}
5714
5715	if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT)
5716	return chains;
5717
5718	vht_cap_elem = ieee80211_bss_get_elem(bss: cbss, id: WLAN_EID_VHT_CAPABILITY);
5719	if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) {
5720	u8 nss;
5721	u16 tx_mcs_map;
5722
5723	vht_cap = (void *)vht_cap_elem->data;
5724	tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
5725	for (nss = `8`; nss > `0`; nss--) {
5726	if (((tx_mcs_map >> (`2` * (nss - `1`))) & `3`) !=
5727	IEEE80211_VHT_MCS_NOT_SUPPORTED)
5728	break;
5729	}
5730	/ TODO: use "Tx Highest Supported Long GI Data Rate" field? /
5731	chains = max(chains, nss);
5732	}
5733
5734	if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE)
5735	return chains;
5736
5737	ies = rcu_dereference(cbss->ies);
5738	he_cap_elem = cfg80211_find_ext_elem(ext_eid: WLAN_EID_EXT_HE_CAPABILITY,
5739	ies: ies->data, len: ies->len);
5740
5741	if (!he_cap_elem \|\| he_cap_elem->datalen < sizeof(*he_cap) + `1`)
5742	return chains;
5743
5744	/ skip one byte ext_tag_id /
5745	he_cap = (void *)(he_cap_elem->data + `1`);
5746	mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
5747
5748	/ invalid HE IE /
5749	if (he_cap_elem->datalen < `1` + mcs_nss_size + sizeof(*he_cap))
5750	return chains;
5751
5752	/ mcs_nss is right after he_cap info /
5753	he_mcs_nss_supp = (void *)(he_cap + `1`);
5754
5755	mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
5756
5757	for (i = `7`; i >= `0`; i--) {
5758	u8 mcs_80 = mcs_80_map >> (`2` * i) & `3`;
5759
5760	if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
5761	chains = max_t(u8, chains, i + `1`);
5762	break;
5763	}
5764	}
5765
5766	support_160 = he_cap->phy_cap_info[`0`] &
5767	IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
5768
5769	if (!support_160)
5770	return chains;
5771
5772	mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160);
5773	for (i = `7`; i >= `0`; i--) {
5774	u8 mcs_160 = mcs_160_map >> (`2` * i) & `3`;
5775
5776	if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
5777	chains = max_t(u8, chains, i + `1`);
5778	break;
5779	}
5780	}
5781
5782	return chains;
5783	}
5784
5785	static void
5786	ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata,
5787	struct ieee80211_supported_band *sband,
5788	struct cfg80211_assoc_request *req,
5789	bool wmm_used, int link_id,
5790	struct ieee80211_conn_settings *conn)
5791	{
5792	struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap;
5793	bool is_5ghz = sband->band == NL80211_BAND_5GHZ;
5794	bool is_6ghz = sband->band == NL80211_BAND_6GHZ;
5795	const struct ieee80211_sta_he_cap *he_cap;
5796	const struct ieee80211_sta_eht_cap *eht_cap;
5797	struct ieee80211_sta_vht_cap vht_cap;
5798
5799	if (sband->band == NL80211_BAND_S1GHZ) {
5800	conn->mode = IEEE80211_CONN_MODE_S1G;
5801	conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
5802	mlme_dbg(sdata, "operating as S1G STA\n");
5803	return;
5804	}
5805
5806	conn->mode = IEEE80211_CONN_MODE_LEGACY;
5807	conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
5808
5809	ieee80211_apply_htcap_overrides(sdata, ht_cap: &sta_ht_cap);
5810
5811	if (req && req->flags & ASSOC_REQ_DISABLE_HT) {
5812	mlme_link_id_dbg(sdata, link_id,
5813	"HT disabled by flag, limiting to legacy\n");
5814	goto out;
5815	}
5816
5817	if (!wmm_used) {
5818	mlme_link_id_dbg(sdata, link_id,
5819	"WMM/QoS not supported, limiting to legacy\n");
5820	goto out;
5821	}
5822
5823	if (req) {
5824	unsigned int i;
5825
5826	for (i = `0`; i < req->crypto.n_ciphers_pairwise; i++) {
5827	if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 \|\|
5828	req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP \|\|
5829	req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5830	netdev_info(dev: sdata->dev,
5831	format: "WEP/TKIP use, limiting to legacy\n");
5832	goto out;
5833	}
5834	}
5835	}
5836
5837	if (!sta_ht_cap.ht_supported && !is_6ghz) {
5838	mlme_link_id_dbg(sdata, link_id,
5839	"HT not supported (and not on 6 GHz), limiting to legacy\n");
5840	goto out;
5841	}
5842
5843	/ HT is fine /
5844	conn->mode = IEEE80211_CONN_MODE_HT;
5845	conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
5846	IEEE80211_CONN_BW_LIMIT_40 :
5847	IEEE80211_CONN_BW_LIMIT_20;
5848
5849	memcpy(to: &vht_cap, from: &sband->vht_cap, len: sizeof(vht_cap));
5850	ieee80211_apply_vhtcap_overrides(sdata, vht_cap: &vht_cap);
5851
5852	if (req && req->flags & ASSOC_REQ_DISABLE_VHT) {
5853	mlme_link_id_dbg(sdata, link_id,
5854	"VHT disabled by flag, limiting to HT\n");
5855	goto out;
5856	}
5857
5858	if (vht_cap.vht_supported && is_5ghz) {
5859	bool have_80mhz = false;
5860	unsigned int i;
5861
5862	if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) {
5863	mlme_link_id_dbg(sdata, link_id,
5864	"no 40 MHz support on 5 GHz, limiting to HT\n");
5865	goto out;
5866	}
5867
5868	/ Allow VHT if at least one channel on the sband supports 80 MHz /
5869	for (i = `0`; i < sband->n_channels; i++) {
5870	if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED \|
5871	IEEE80211_CHAN_NO_80MHZ))
5872	continue;
5873
5874	have_80mhz = true;
5875	break;
5876	}
5877
5878	if (!have_80mhz) {
5879	mlme_link_id_dbg(sdata, link_id,
5880	"no 80 MHz channel support on 5 GHz, limiting to HT\n");
5881	goto out;
5882	}
5883	} else if (is_5ghz) { / !vht_supported but on 5 GHz /
5884	mlme_link_id_dbg(sdata, link_id,
5885	"no VHT support on 5 GHz, limiting to HT\n");
5886	goto out;
5887	}
5888
5889	/ VHT - if we have - is fine, including 80 MHz, check 160 below again /
5890	if (sband->band != NL80211_BAND_2GHZ) {
5891	conn->mode = IEEE80211_CONN_MODE_VHT;
5892	conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160;
5893	}
5894
5895	if (is_5ghz &&
5896	!(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ \|
5897	IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) {
5898	conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
5899	mlme_link_id_dbg(sdata, link_id,
5900	"no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz");
5901	}
5902
5903	if (req && req->flags & ASSOC_REQ_DISABLE_HE) {
5904	mlme_link_id_dbg(sdata, link_id,
5905	"HE disabled by flag, limiting to HT/VHT\n");
5906	goto out;
5907	}
5908
5909	he_cap = ieee80211_get_he_iftype_cap_vif(sband, vif: &sdata->vif);
5910	if (!he_cap) {
5911	WARN_ON(is_6ghz);
5912	mlme_link_id_dbg(sdata, link_id,
5913	"no HE support, limiting to HT/VHT\n");
5914	goto out;
5915	}
5916
5917	/ so we have HE /
5918	conn->mode = IEEE80211_CONN_MODE_HE;
5919
5920	/ check bandwidth /
5921	switch (sband->band) {
5922	default:
5923	case NL80211_BAND_2GHZ:
5924	if (he_cap->he_cap_elem.phy_cap_info[`0`] &
5925	IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G)
5926	break;
5927	conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
5928	mlme_link_id_dbg(sdata, link_id,
5929	"no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n");
5930	break;
5931	case NL80211_BAND_5GHZ:
5932	if (!(he_cap->he_cap_elem.phy_cap_info[`0`] &
5933	IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) {
5934	conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
5935	mlme_link_id_dbg(sdata, link_id,
5936	"no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n");
5937	break;
5938	}
5939	if (!(he_cap->he_cap_elem.phy_cap_info[`0`] &
5940	IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) {
5941	conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
5942	conn->bw_limit,
5943	IEEE80211_CONN_BW_LIMIT_80);
5944	mlme_link_id_dbg(sdata, link_id,
5945	"no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n");
5946	}
5947	break;
5948	case NL80211_BAND_6GHZ:
5949	if (he_cap->he_cap_elem.phy_cap_info[`0`] &
5950	IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)
5951	break;
5952	conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
5953	conn->bw_limit,
5954	IEEE80211_CONN_BW_LIMIT_80);
5955	mlme_link_id_dbg(sdata, link_id,
5956	"no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n");
5957	break;
5958	}
5959
5960	if (req && req->flags & ASSOC_REQ_DISABLE_EHT) {
5961	mlme_link_id_dbg(sdata, link_id,
5962	"EHT disabled by flag, limiting to HE\n");
5963	goto out;
5964	}
5965
5966	eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, vif: &sdata->vif);
5967	if (!eht_cap) {
5968	mlme_link_id_dbg(sdata, link_id,
5969	"no EHT support, limiting to HE\n");
5970	goto out;
5971	}
5972
5973	/ we have EHT /
5974
5975	conn->mode = IEEE80211_CONN_MODE_EHT;
5976
5977	/ check bandwidth /
5978	if (is_6ghz &&
5979	eht_cap->eht_cap_elem.phy_cap_info[`0`] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)
5980	conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320;
5981	else if (is_6ghz)
5982	mlme_link_id_dbg(sdata, link_id,
5983	"no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n");
5984
5985	out:
5986	mlme_link_id_dbg(sdata, link_id,
5987	"determined local STA to be %s, BW limited to %d MHz\n",
5988	ieee80211_conn_mode_str(conn->mode),
5989	`20` * (`1` << conn->bw_limit));
5990	}
5991
5992	static void
5993	ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata,
5994	struct ieee80211_supported_band *sband,
5995	struct cfg80211_auth_request *req,
5996	bool wmm_used,
5997	struct ieee80211_conn_settings *conn)
5998	{
5999	ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used,
6000	link_id: req->link_id > `0` ? req->link_id : `0`,
6001	conn);
6002	}
6003
6004	static void
6005	ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata,
6006	struct ieee80211_supported_band *sband,
6007	struct cfg80211_assoc_request *req,
6008	bool wmm_used, int link_id,
6009	struct ieee80211_conn_settings *conn)
6010	{
6011	struct ieee80211_conn_settings tmp;
6012
6013	WARN_ON(!req);
6014
6015	ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id,
6016	conn: &tmp);
6017
6018	conn->mode = min_t(enum ieee80211_conn_mode,
6019	conn->mode, tmp.mode);
6020	conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
6021	conn->bw_limit, tmp.bw_limit);
6022	}
6023
6024	static enum ieee80211_ap_reg_power
6025	ieee80211_ap_power_type(u8 control)
6026	{
6027	switch (u8_get_bits(v: control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
6028	case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
6029	case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP:
6030	return IEEE80211_REG_LPI_AP;
6031	case IEEE80211_6GHZ_CTRL_REG_SP_AP:
6032	case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP:
6033	case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP_OLD:
6034	return IEEE80211_REG_SP_AP;
6035	case IEEE80211_6GHZ_CTRL_REG_VLP_AP:
6036	return IEEE80211_REG_VLP_AP;
6037	default:
6038	return IEEE80211_REG_UNSET_AP;
6039	}
6040	}
6041
6042	static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
6043	struct ieee80211_link_data *link,
6044	int link_id,
6045	struct cfg80211_bss *cbss, bool mlo,
6046	struct ieee80211_conn_settings *conn,
6047	unsigned long *userspace_selectors)
6048	{
6049	struct ieee80211_local *local = sdata->local;
6050	bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
6051	struct ieee80211_chan_req chanreq = {};
6052	struct cfg80211_chan_def ap_chandef;
6053	struct ieee802_11_elems *elems;
6054	int ret;
6055
6056	lockdep_assert_wiphy(local->hw.wiphy);
6057
6058	rcu_read_lock();
6059	elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id,
6060	chanreq: &chanreq, ap_chandef: &ap_chandef,
6061	userspace_selectors);
6062
6063	if (IS_ERR(ptr: elems)) {
6064	rcu_read_unlock();
6065	return PTR_ERR(ptr: elems);
6066	}
6067
6068	if (mlo && !elems->ml_basic) {
6069	sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n");
6070	rcu_read_unlock();
6071	kfree(objp: elems);
6072	return -EINVAL;
6073	}
6074
6075	if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) {
6076	const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
6077
6078	if (elems->pwr_constr_elem)
6079	link->conf->pwr_reduction = *elems->pwr_constr_elem;
6080
6081	he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper: elems->he_operation);
6082	if (he_6ghz_oper)
6083	link->conf->power_type =
6084	ieee80211_ap_power_type(control: he_6ghz_oper->control);
6085	else
6086	link_info(link,
6087	"HE 6 GHz operation missing (on %d MHz), expect issues\n",
6088	cbss->channel->center_freq);
6089
6090	link->conf->tpe = elems->tpe;
6091	ieee80211_rearrange_tpe(tpe: &link->conf->tpe, ap: &ap_chandef,
6092	used: &chanreq.oper);
6093	}
6094	rcu_read_unlock();
6095	/ the element data was RCU protected so no longer valid anyway /
6096	kfree(objp: elems);
6097	elems = NULL;
6098
6099	if (!link)
6100	return `0`;
6101
6102	rcu_read_lock();
6103	link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss),
6104	local->rx_chains);
6105	rcu_read_unlock();
6106
6107	/*
6108	* If this fails (possibly due to channel context sharing
6109	* on incompatible channels, e.g. 80+80 and 160 sharing the
6110	* same control channel) try to use a smaller bandwidth.
6111	*/
6112	ret = ieee80211_link_use_channel(link, req: &chanreq,
6113	mode: IEEE80211_CHANCTX_SHARED);
6114
6115	/ don't downgrade for 5 and 10 MHz channels, though. /
6116	if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 \|\|
6117	chanreq.oper.width == NL80211_CHAN_WIDTH_10)
6118	return ret;
6119
6120	while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) {
6121	ieee80211_chanreq_downgrade(chanreq: &chanreq, conn);
6122
6123	ret = ieee80211_link_use_channel(link, req: &chanreq,
6124	mode: IEEE80211_CHANCTX_SHARED);
6125	}
6126
6127	return ret;
6128	}
6129
6130	static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
6131	u8 dtim_count, u8 dtim_period)
6132	{
6133	const u8 *tim_ie = cfg80211_find_ie(eid: WLAN_EID_TIM, ies: ies->data, len: ies->len);
6134	const u8 *idx_ie = cfg80211_find_ie(eid: WLAN_EID_MULTI_BSSID_IDX, ies: ies->data,
6135	len: ies->len);
6136	const struct ieee80211_tim_ie *tim = NULL;
6137	const struct ieee80211_bssid_index *idx;
6138	bool valid = tim_ie && tim_ie[`1`] >= `2`;
6139
6140	if (valid)
6141	tim = (void *)(tim_ie + `2`);
6142
6143	if (dtim_count)
6144	*dtim_count = valid ? tim->dtim_count : `0`;
6145
6146	if (dtim_period)
6147	*dtim_period = valid ? tim->dtim_period : `0`;
6148
6149	/ Check if value is overridden by non-transmitted profile /
6150	if (!idx_ie \|\| idx_ie[`1`] < `3`)
6151	return valid;
6152
6153	idx = (void *)(idx_ie + `2`);
6154
6155	if (dtim_count)
6156	*dtim_count = idx->dtim_count;
6157
6158	if (dtim_period)
6159	*dtim_period = idx->dtim_period;
6160
6161	return true;
6162	}
6163
6164	static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
6165	struct ieee80211_mgmt *mgmt,
6166	struct ieee802_11_elems *elems,
6167	const u8 elem_start, unsigned* int elem_len)
6168	{
6169	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6170	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
6171	struct ieee80211_local *local = sdata->local;
6172	unsigned int link_id;
6173	struct sta_info *sta;
6174	u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {};
6175	u16 valid_links = `0`, dormant_links = `0`;
6176	int err;
6177
6178	lockdep_assert_wiphy(sdata->local->hw.wiphy);
6179	/*
6180	* station info was already allocated and inserted before
6181	* the association and should be available to us
6182	*/
6183	sta = sta_info_get(sdata, addr: assoc_data->ap_addr);
6184	if (WARN_ON(!sta))
6185	goto out_err;
6186
6187	sta->sta.spp_amsdu = assoc_data->spp_amsdu;
6188
6189	if (ieee80211_vif_is_mld(vif: &sdata->vif)) {
6190	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
6191	if (!assoc_data->link[link_id].bss)
6192	continue;
6193
6194	valid_links \|= BIT(link_id);
6195	if (assoc_data->link[link_id].disabled)
6196	dormant_links \|= BIT(link_id);
6197
6198	if (link_id != assoc_data->assoc_link_id) {
6199	err = ieee80211_sta_allocate_link(sta, link_id);
6200	if (err)
6201	goto out_err;
6202	}
6203	}
6204
6205	ieee80211_vif_set_links(sdata, new_links: valid_links, dormant_links);
6206	}
6207
6208	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
6209	struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
6210	struct ieee80211_link_data *link;
6211	struct link_sta_info *link_sta;
6212
6213	if (!cbss)
6214	continue;
6215
6216	link = sdata_dereference(sdata->link[link_id], sdata);
6217	if (WARN_ON(!link))
6218	goto out_err;
6219
6220	if (ieee80211_vif_is_mld(vif: &sdata->vif))
6221	link_info(link,
6222	"local address %pM, AP link address %pM%s\n",
6223	link->conf->addr,
6224	assoc_data->link[link_id].bss->bssid,
6225	link_id == assoc_data->assoc_link_id ?
6226	" (assoc)" : "");
6227
6228	link_sta = rcu_dereference_protected(sta->link[link_id],
6229	lockdep_is_held(&local->hw.wiphy->mtx));
6230	if (WARN_ON(!link_sta))
6231	goto out_err;
6232
6233	if (!link->u.mgd.have_beacon) {
6234	const struct cfg80211_bss_ies *ies;
6235
6236	rcu_read_lock();
6237	ies = rcu_dereference(cbss->beacon_ies);
6238	if (ies)
6239	link->u.mgd.have_beacon = true;
6240	else
6241	ies = rcu_dereference(cbss->ies);
6242	ieee80211_get_dtim(ies,
6243	dtim_count: &link->conf->sync_dtim_count,
6244	dtim_period: &link->u.mgd.dtim_period);
6245	link->conf->beacon_int = cbss->beacon_interval;
6246	rcu_read_unlock();
6247	}
6248
6249	link->conf->dtim_period = link->u.mgd.dtim_period ?: `1`;
6250
6251	if (link_id != assoc_data->assoc_link_id) {
6252	link->u.mgd.conn = assoc_data->link[link_id].conn;
6253
6254	err = ieee80211_prep_channel(sdata, link, link_id, cbss,
6255	mlo: true, conn: &link->u.mgd.conn,
6256	userspace_selectors: sdata->u.mgd.userspace_selectors);
6257	if (err) {
6258	link_info(link, "prep_channel failed\n");
6259	goto out_err;
6260	}
6261	}
6262
6263	err = ieee80211_mgd_setup_link_sta(link, sta, link_sta,
6264	cbss: assoc_data->link[link_id].bss);
6265	if (err)
6266	goto out_err;
6267
6268	if (!ieee80211_assoc_config_link(link, link_sta,
6269	cbss: assoc_data->link[link_id].bss,
6270	mgmt, elem_start, elem_len,
6271	changed: &changed[link_id]))
6272	goto out_err;
6273
6274	if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) {
6275	valid_links &= ~BIT(link_id);
6276	ieee80211_sta_remove_link(sta, link_id);
6277	continue;
6278	}
6279
6280	if (link_id != assoc_data->assoc_link_id) {
6281	err = ieee80211_sta_activate_link(sta, link_id);
6282	if (err)
6283	goto out_err;
6284	}
6285	}
6286
6287	/ links might have changed due to rejected ones, set them again /
6288	ieee80211_vif_set_links(sdata, new_links: valid_links, dormant_links);
6289
6290	rate_control_rate_init_all_links(sta);
6291
6292	if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
6293	set_sta_flag(sta, flag: WLAN_STA_MFP);
6294	sta->sta.mfp = true;
6295	} else {
6296	sta->sta.mfp = false;
6297	}
6298
6299	ieee80211_sta_set_max_amsdu_subframes(sta, ext_capab: elems->ext_capab,
6300	ext_capab_len: elems->ext_capab_len);
6301
6302	sta->sta.wme = (elems->wmm_param \|\| elems->s1g_capab) &&
6303	local->hw.queues >= IEEE80211_NUM_ACS;
6304
6305	err = sta_info_move_state(sta, new_state: IEEE80211_STA_ASSOC);
6306	if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
6307	err = sta_info_move_state(sta, new_state: IEEE80211_STA_AUTHORIZED);
6308	if (err) {
6309	sdata_info(sdata,
6310	"failed to move station %pM to desired state\n",
6311	sta->sta.addr);
6312	WARN_ON(__sta_info_destroy(sta));
6313	goto out_err;
6314	}
6315
6316	if (sdata->wdev.use_4addr)
6317	drv_sta_set_4addr(local, sdata, sta: &sta->sta, enabled: true);
6318
6319	ieee80211_set_associated(sdata, assoc_data, changed);
6320
6321	/*
6322	* If we're using 4-addr mode, let the AP know that we're
6323	* doing so, so that it can create the STA VLAN on its side
6324	*/
6325	if (ifmgd->use_4addr)
6326	ieee80211_send_4addr_nullfunc(local, sdata);
6327
6328	/*
6329	* Start timer to probe the connection to the AP now.
6330	* Also start the timer that will detect beacon loss.
6331	*/
6332	ieee80211_sta_reset_beacon_monitor(sdata);
6333	ieee80211_sta_reset_conn_monitor(sdata);
6334
6335	return true;
6336	out_err:
6337	eth_zero_addr(addr: sdata->vif.cfg.ap_addr);
6338	return false;
6339	}
6340
6341	static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
6342	struct ieee80211_mgmt *mgmt,
6343	size_t len)
6344	{
6345	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6346	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
6347	u16 capab_info, status_code, aid;
6348	struct ieee80211_elems_parse_params parse_params = {
6349	.bss = NULL,
6350	.link_id = -`1`,
6351	.from_ap = true,
6352	};
6353	struct ieee802_11_elems *elems;
6354	int ac;
6355	const u8 *elem_start;
6356	unsigned int elem_len;
6357	bool reassoc;
6358	struct ieee80211_event event = {
6359	.type = MLME_EVENT,
6360	.u.mlme.data = ASSOC_EVENT,
6361	};
6362	struct ieee80211_prep_tx_info info = {};
6363	struct cfg80211_rx_assoc_resp_data resp = {
6364	.uapsd_queues = -`1`,
6365	};
6366	u8 ap_mld_addr[ETH_ALEN] __aligned(`2`);
6367	unsigned int link_id;
6368	u16 max_aid = IEEE80211_MAX_AID;
6369
6370	lockdep_assert_wiphy(sdata->local->hw.wiphy);
6371
6372	if (!assoc_data)
6373	return;
6374
6375	info.link_id = assoc_data->assoc_link_id;
6376
6377	parse_params.mode =
6378	assoc_data->link[assoc_data->assoc_link_id].conn.mode;
6379
6380	if (!ether_addr_equal(addr1: assoc_data->ap_addr, addr2: mgmt->bssid) \|\|
6381	!ether_addr_equal(addr1: assoc_data->ap_addr, addr2: mgmt->sa))
6382	return;
6383
6384	/*
6385	* AssocResp and ReassocResp have identical structure, so process both
6386	* of them in this function.
6387	*/
6388
6389	if (len < `24` + `6`)
6390	return;
6391
6392	reassoc = ieee80211_is_reassoc_resp(fc: mgmt->frame_control);
6393	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
6394	status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
6395	if (assoc_data->s1g) {
6396	elem_start = mgmt->u.s1g_assoc_resp.variable;
6397	max_aid = IEEE80211_MAX_SUPPORTED_S1G_AID;
6398	} else {
6399	elem_start = mgmt->u.assoc_resp.variable;
6400	}
6401
6402	/*
6403	* Note: this may not be perfect, AP might misbehave - if
6404	* anyone needs to rely on perfect complete notification
6405	* with the exact right subtype, then we need to track what
6406	* we actually transmitted.
6407	*/
6408	info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ :
6409	IEEE80211_STYPE_ASSOC_REQ;
6410
6411	if (assoc_data->fils_kek_len &&
6412	fils_decrypt_assoc_resp(sdata, frame: (u8 *)mgmt, frame_len: &len, assoc_data) < `0`)
6413	return;
6414
6415	elem_len = len - (elem_start - (u8 *)mgmt);
6416	parse_params.start = elem_start;
6417	parse_params.len = elem_len;
6418	elems = ieee802_11_parse_elems_full(params: &parse_params);
6419	if (!elems)
6420	goto notify_driver;
6421
6422	if (elems->aid_resp)
6423	aid = le16_to_cpu(elems->aid_resp->aid);
6424	else
6425	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
6426
6427	/*
6428	* The 5 MSB of the AID field are reserved for a non-S1G STA. For
6429	* an S1G STA the 3 MSBs are reserved.
6430	* (802.11-2016 9.4.1.8 AID field).
6431	*/
6432	aid &= assoc_data->s1g ? `0x1fff` : `0x7ff`;
6433
6434	sdata_info(sdata,
6435	"RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
6436	reassoc ? "Rea" : "A", assoc_data->ap_addr,
6437	capab_info, status_code, (u16)(aid & ~(BIT(`15`) \| BIT(`14`))));
6438
6439	ifmgd->broken_ap = false;
6440
6441	if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
6442	elems->timeout_int &&
6443	elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
6444	u32 tu, ms;
6445
6446	cfg80211_assoc_comeback(netdev: sdata->dev, ap_addr: assoc_data->ap_addr,
6447	le32_to_cpu(elems->timeout_int->value));
6448
6449	tu = le32_to_cpu(elems->timeout_int->value);
6450	ms = tu * `1024` / `1000`;
6451	sdata_info(sdata,
6452	"%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
6453	assoc_data->ap_addr, tu, ms);
6454	assoc_data->timeout = jiffies + msecs_to_jiffies(m: ms);
6455	assoc_data->timeout_started = true;
6456	assoc_data->comeback = true;
6457	if (ms > IEEE80211_ASSOC_TIMEOUT)
6458	run_again(sdata, timeout: assoc_data->timeout);
6459	goto notify_driver;
6460	}
6461
6462	if (status_code != WLAN_STATUS_SUCCESS) {
6463	sdata_info(sdata, "%pM denied association (code=%d)\n",
6464	assoc_data->ap_addr, status_code);
6465	event.u.mlme.status = MLME_DENIED;
6466	event.u.mlme.reason = status_code;
6467	drv_event_callback(local: sdata->local, sdata, event: &event);
6468	} else {
6469	if (aid == `0` \|\| aid > max_aid) {
6470	sdata_info(sdata,
6471	"invalid AID value %d (out of range), turn off PS\n",
6472	aid);
6473	aid = `0`;
6474	ifmgd->broken_ap = true;
6475	}
6476
6477	if (ieee80211_vif_is_mld(vif: &sdata->vif)) {
6478	struct ieee80211_mle_basic_common_info *common;
6479
6480	if (!elems->ml_basic) {
6481	sdata_info(sdata,
6482	"MLO association with %pM but no (basic) multi-link element in response!\n",
6483	assoc_data->ap_addr);
6484	goto abandon_assoc;
6485	}
6486
6487	common = (void *)elems->ml_basic->variable;
6488
6489	if (memcmp(assoc_data->ap_addr,
6490	common->mld_mac_addr, ETH_ALEN)) {
6491	sdata_info(sdata,
6492	"AP MLD MAC address mismatch: got %pM expected %pM\n",
6493	common->mld_mac_addr,
6494	assoc_data->ap_addr);
6495	goto abandon_assoc;
6496	}
6497
6498	sdata->vif.cfg.eml_cap =
6499	ieee80211_mle_get_eml_cap(data: (const void *)elems->ml_basic);
6500	sdata->vif.cfg.eml_med_sync_delay =
6501	ieee80211_mle_get_eml_med_sync_delay(data: (const void *)elems->ml_basic);
6502	sdata->vif.cfg.mld_capa_op =
6503	ieee80211_mle_get_mld_capa_op(data: (const void *)elems->ml_basic);
6504	}
6505
6506	sdata->vif.cfg.aid = aid;
6507	sdata->vif.cfg.s1g = assoc_data->s1g;
6508
6509	if (!ieee80211_assoc_success(sdata, mgmt, elems,
6510	elem_start, elem_len)) {
6511	/ oops -- internal error -- send timeout for now /
6512	ieee80211_destroy_assoc_data(sdata, status: ASSOC_TIMEOUT);
6513	goto notify_driver;
6514	}
6515	event.u.mlme.status = MLME_SUCCESS;
6516	drv_event_callback(local: sdata->local, sdata, event: &event);
6517	sdata_info(sdata, "associated\n");
6518
6519	info.success = `1`;
6520	}
6521
6522	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
6523	struct ieee80211_link_data *link;
6524
6525	if (!assoc_data->link[link_id].bss)
6526	continue;
6527
6528	resp.links[link_id].bss = assoc_data->link[link_id].bss;
6529	ether_addr_copy(dst: resp.links[link_id].addr,
6530	src: assoc_data->link[link_id].addr);
6531	resp.links[link_id].status = assoc_data->link[link_id].status;
6532
6533	link = sdata_dereference(sdata->link[link_id], sdata);
6534	if (!link)
6535	continue;
6536
6537	/ get uapsd queues configuration - same for all links /
6538	resp.uapsd_queues = `0`;
6539	for (ac = `0`; ac < IEEE80211_NUM_ACS; ac++)
6540	if (link->tx_conf[ac].uapsd)
6541	resp.uapsd_queues \|= ieee80211_ac_to_qos_mask[ac];
6542	}
6543
6544	if (ieee80211_vif_is_mld(vif: &sdata->vif)) {
6545	ether_addr_copy(dst: ap_mld_addr, src: sdata->vif.cfg.ap_addr);
6546	resp.ap_mld_addr = ap_mld_addr;
6547	}
6548
6549	ieee80211_destroy_assoc_data(sdata,
6550	status: status_code == WLAN_STATUS_SUCCESS ?
6551	ASSOC_SUCCESS :
6552	ASSOC_REJECTED);
6553
6554	resp.buf = (u8 *)mgmt;
6555	resp.len = len;
6556	resp.req_ies = ifmgd->assoc_req_ies;
6557	resp.req_ies_len = ifmgd->assoc_req_ies_len;
6558	cfg80211_rx_assoc_resp(dev: sdata->dev, data: &resp);
6559	notify_driver:
6560	drv_mgd_complete_tx(local: sdata->local, sdata, info: &info);
6561	kfree(objp: elems);
6562	return;
6563	abandon_assoc:
6564	ieee80211_destroy_assoc_data(sdata, status: ASSOC_ABANDON);
6565	goto notify_driver;
6566	}
6567
6568	static void ieee80211_rx_bss_info(struct ieee80211_link_data *link,
6569	struct ieee80211_mgmt *mgmt, size_t len,
6570	struct ieee80211_rx_status *rx_status)
6571	{
6572	struct ieee80211_sub_if_data *sdata = link->sdata;
6573	struct ieee80211_local *local = sdata->local;
6574	struct ieee80211_bss *bss;
6575	struct ieee80211_channel *channel;
6576
6577	lockdep_assert_wiphy(sdata->local->hw.wiphy);
6578
6579	channel = ieee80211_get_channel_khz(wiphy: local->hw.wiphy,
6580	freq: ieee80211_rx_status_to_khz(rx_status));
6581	if (!channel)
6582	return;
6583
6584	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
6585	if (bss) {
6586	link->conf->beacon_rate = bss->beacon_rate;
6587	ieee80211_rx_bss_put(local, bss);
6588	}
6589	}
6590
6591
6592	static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link,
6593	struct sk_buff *skb)
6594	{
6595	struct ieee80211_sub_if_data *sdata = link->sdata;
6596	struct ieee80211_mgmt mgmt = (void* *)skb->data;
6597	struct ieee80211_if_managed *ifmgd;
6598	struct ieee80211_rx_status rx_status = (void* *) skb->cb;
6599	struct ieee80211_channel *channel;
6600	size_t baselen, len = skb->len;
6601
6602	ifmgd = &sdata->u.mgd;
6603
6604	lockdep_assert_wiphy(sdata->local->hw.wiphy);
6605
6606	/*
6607	* According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
6608	* "If a 6 GHz AP receives a Probe Request frame and responds with
6609	* a Probe Response frame [..], the Address 1 field of the Probe
6610	* Response frame shall be set to the broadcast address [..]"
6611	* So, on 6GHz band we should also accept broadcast responses.
6612	*/
6613	channel = ieee80211_get_channel(wiphy: sdata->local->hw.wiphy,
6614	freq: rx_status->freq);
6615	if (!channel)
6616	return;
6617
6618	if (!ether_addr_equal(addr1: mgmt->da, addr2: sdata->vif.addr) &&
6619	(channel->band != NL80211_BAND_6GHZ \|\|
6620	!is_broadcast_ether_addr(addr: mgmt->da)))
6621	return; / ignore ProbeResp to foreign address /
6622
6623	baselen = (u8 ) mgmt->u.probe_resp.variable - (u8 ) mgmt;
6624	if (baselen > len)
6625	return;
6626
6627	ieee80211_rx_bss_info(link, mgmt, len, rx_status);
6628
6629	if (ifmgd->associated &&
6630	ether_addr_equal(addr1: mgmt->bssid, addr2: link->u.mgd.bssid))
6631	ieee80211_reset_ap_probe(sdata);
6632	}
6633
6634	/*
6635	* This is the canonical list of information elements we care about,
6636	* the filter code also gives us all changes to the Microsoft OUI
6637	* (00:50:F2) vendor IE which is used for WMM which we need to track,
6638	* as well as the DTPC IE (part of the Cisco OUI) used for signaling
6639	* changes to requested client power.
6640	*
6641	* We implement beacon filtering in software since that means we can
6642	* avoid processing the frame here and in cfg80211, and userspace
6643	* will not be able to tell whether the hardware supports it or not.
6644	*
6645	* XXX: This list needs to be dynamic -- userspace needs to be able to
6646	* add items it requires. It also needs to be able to tell us to
6647	* look out for other vendor IEs.
6648	*/
6649	static const u64 care_about_ies =
6650	(`1ULL` << WLAN_EID_COUNTRY) \|
6651	(`1ULL` << WLAN_EID_ERP_INFO) \|
6652	(`1ULL` << WLAN_EID_CHANNEL_SWITCH) \|
6653	(`1ULL` << WLAN_EID_PWR_CONSTRAINT) \|
6654	(`1ULL` << WLAN_EID_HT_CAPABILITY) \|
6655	(`1ULL` << WLAN_EID_HT_OPERATION) \|
6656	(`1ULL` << WLAN_EID_EXT_CHANSWITCH_ANN);
6657
6658	static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link,
6659	struct ieee80211_if_managed *ifmgd,
6660	struct ieee80211_bss_conf *bss_conf,
6661	struct ieee80211_local *local,
6662	struct ieee80211_rx_status *rx_status)
6663	{
6664	struct ieee80211_sub_if_data *sdata = link->sdata;
6665
6666	/ Track average RSSI from the Beacon frames of the current AP /
6667
6668	if (!link->u.mgd.tracking_signal_avg) {
6669	link->u.mgd.tracking_signal_avg = true;
6670	ewma_beacon_signal_init(e: &link->u.mgd.ave_beacon_signal);
6671	link->u.mgd.last_cqm_event_signal = `0`;
6672	link->u.mgd.count_beacon_signal = `1`;
6673	link->u.mgd.last_ave_beacon_signal = `0`;
6674	} else {
6675	link->u.mgd.count_beacon_signal++;
6676	}
6677
6678	ewma_beacon_signal_add(e: &link->u.mgd.ave_beacon_signal,
6679	val: -rx_status->signal);
6680
6681	if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
6682	link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
6683	int sig = -ewma_beacon_signal_read(e: &link->u.mgd.ave_beacon_signal);
6684	int last_sig = link->u.mgd.last_ave_beacon_signal;
6685	struct ieee80211_event event = {
6686	.type = RSSI_EVENT,
6687	};
6688
6689	/*
6690	* if signal crosses either of the boundaries, invoke callback
6691	* with appropriate parameters
6692	*/
6693	if (sig > ifmgd->rssi_max_thold &&
6694	(last_sig <= ifmgd->rssi_min_thold \|\| last_sig == `0`)) {
6695	link->u.mgd.last_ave_beacon_signal = sig;
6696	event.u.rssi.data = RSSI_EVENT_HIGH;
6697	drv_event_callback(local, sdata, event: &event);
6698	} else if (sig < ifmgd->rssi_min_thold &&
6699	(last_sig >= ifmgd->rssi_max_thold \|\|
6700	last_sig == `0`)) {
6701	link->u.mgd.last_ave_beacon_signal = sig;
6702	event.u.rssi.data = RSSI_EVENT_LOW;
6703	drv_event_callback(local, sdata, event: &event);
6704	}
6705	}
6706
6707	if (bss_conf->cqm_rssi_thold &&
6708	link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
6709	!(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
6710	int sig = -ewma_beacon_signal_read(e: &link->u.mgd.ave_beacon_signal);
6711	int last_event = link->u.mgd.last_cqm_event_signal;
6712	int thold = bss_conf->cqm_rssi_thold;
6713	int hyst = bss_conf->cqm_rssi_hyst;
6714
6715	if (sig < thold &&
6716	(last_event == `0` \|\| sig < last_event - hyst)) {
6717	link->u.mgd.last_cqm_event_signal = sig;
6718	ieee80211_cqm_rssi_notify(
6719	vif: &sdata->vif,
6720	rssi_event: NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
6721	rssi_level: sig, GFP_KERNEL);
6722	} else if (sig > thold &&
6723	(last_event == `0` \|\| sig > last_event + hyst)) {
6724	link->u.mgd.last_cqm_event_signal = sig;
6725	ieee80211_cqm_rssi_notify(
6726	vif: &sdata->vif,
6727	rssi_event: NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
6728	rssi_level: sig, GFP_KERNEL);
6729	}
6730	}
6731
6732	if (bss_conf->cqm_rssi_low &&
6733	link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
6734	int sig = -ewma_beacon_signal_read(e: &link->u.mgd.ave_beacon_signal);
6735	int last_event = link->u.mgd.last_cqm_event_signal;
6736	int low = bss_conf->cqm_rssi_low;
6737	int high = bss_conf->cqm_rssi_high;
6738
6739	if (sig < low &&
6740	(last_event == `0` \|\| last_event >= low)) {
6741	link->u.mgd.last_cqm_event_signal = sig;
6742	ieee80211_cqm_rssi_notify(
6743	vif: &sdata->vif,
6744	rssi_event: NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
6745	rssi_level: sig, GFP_KERNEL);
6746	} else if (sig > high &&
6747	(last_event == `0` \|\| last_event <= high)) {
6748	link->u.mgd.last_cqm_event_signal = sig;
6749	ieee80211_cqm_rssi_notify(
6750	vif: &sdata->vif,
6751	rssi_event: NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
6752	rssi_level: sig, GFP_KERNEL);
6753	}
6754	}
6755	}
6756
6757	static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
6758	struct cfg80211_bss *bss)
6759	{
6760	if (ether_addr_equal(addr1: tx_bssid, addr2: bss->bssid))
6761	return true;
6762	if (!bss->transmitted_bss)
6763	return false;
6764	return ether_addr_equal(addr1: tx_bssid, addr2: bss->transmitted_bss->bssid);
6765	}
6766
6767	static void ieee80211_ml_reconf_work(struct wiphy *wiphy,
6768	struct wiphy_work *work)
6769	{
6770	struct ieee80211_sub_if_data *sdata =
6771	container_of(work, struct ieee80211_sub_if_data,
6772	u.mgd.ml_reconf_work.work);
6773	u16 new_valid_links, new_active_links, new_dormant_links;
6774	int ret;
6775
6776	if (!sdata->u.mgd.removed_links)
6777	return;
6778
6779	sdata_info(sdata,
6780	"MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n",
6781	sdata->vif.valid_links, sdata->u.mgd.removed_links);
6782
6783	new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links;
6784	if (new_valid_links == sdata->vif.valid_links)
6785	return;
6786
6787	if (!new_valid_links \|\|
6788	!(new_valid_links & ~sdata->vif.dormant_links)) {
6789	sdata_info(sdata, "No valid links after reconfiguration\n");
6790	ret = -EINVAL;
6791	goto out;
6792	}
6793
6794	new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links;
6795	if (new_active_links != sdata->vif.active_links) {
6796	if (!new_active_links)
6797	new_active_links =
6798	BIT(ffs(new_valid_links &
6799	~sdata->vif.dormant_links) - `1`);
6800
6801	ret = ieee80211_set_active_links(vif: &sdata->vif, active_links: new_active_links);
6802	if (ret) {
6803	sdata_info(sdata,
6804	"Failed setting active links\n");
6805	goto out;
6806	}
6807	}
6808
6809	new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links;
6810
6811	ret = ieee80211_vif_set_links(sdata, new_links: new_valid_links,
6812	dormant_links: new_dormant_links);
6813	if (ret)
6814	sdata_info(sdata, "Failed setting valid links\n");
6815
6816	ieee80211_vif_cfg_change_notify(sdata, changed: BSS_CHANGED_MLD_VALID_LINKS);
6817
6818	out:
6819	if (!ret)
6820	cfg80211_links_removed(dev: sdata->dev, link_mask: sdata->u.mgd.removed_links);
6821	else
6822	__ieee80211_disconnect(sdata);
6823
6824	sdata->u.mgd.removed_links = `0`;
6825	}
6826
6827	static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata,
6828	struct ieee802_11_elems *elems)
6829	{
6830	const struct element *sub;
6831	unsigned long removed_links = `0`;
6832	u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {};
6833	u8 link_id;
6834	u32 delay;
6835
6836	if (!ieee80211_vif_is_mld(vif: &sdata->vif) \|\| !elems->ml_reconf)
6837	return;
6838
6839	/ Directly parse the sub elements as the common information doesn't*
6840	* hold any useful information.
6841	*/
6842	for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf,
6843	elems->ml_reconf_len) {
6844	struct ieee80211_mle_per_sta_profile prof = (void* *)sub->data;
6845	u8 *pos = prof->variable;
6846	u16 control;
6847
6848	if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE)
6849	continue;
6850
6851	if (!ieee80211_mle_reconf_sta_prof_size_ok(data: sub->data,
6852	len: sub->datalen))
6853	return;
6854
6855	control = le16_to_cpu(prof->control);
6856	link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID;
6857
6858	removed_links \|= BIT(link_id);
6859
6860	/ the MAC address should not be included, but handle it /
6861	if (control &
6862	IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT)
6863	pos += `6`;
6864
6865	/ According to Draft P802.11be_D3.0, the control should*
6866	* include the AP Removal Timer present. If the AP Removal Timer
6867	* is not present assume immediate removal.
6868	*/
6869	if (control &
6870	IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT)
6871	link_removal_timeout[link_id] = get_unaligned_le16(p: pos);
6872	}
6873
6874	removed_links &= sdata->vif.valid_links;
6875	if (!removed_links) {
6876	/ In case the removal was cancelled, abort it /
6877	if (sdata->u.mgd.removed_links) {
6878	sdata->u.mgd.removed_links = `0`;
6879	wiphy_delayed_work_cancel(wiphy: sdata->local->hw.wiphy,
6880	dwork: &sdata->u.mgd.ml_reconf_work);
6881	}
6882	return;
6883	}
6884
6885	delay = `0`;
6886	for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) {
6887	struct ieee80211_bss_conf *link_conf =
6888	sdata_dereference(sdata->vif.link_conf[link_id], sdata);
6889	u32 link_delay;
6890
6891	if (!link_conf) {
6892	removed_links &= ~BIT(link_id);
6893	continue;
6894	}
6895
6896	if (link_removal_timeout[link_id] < `1`)
6897	link_delay = `0`;
6898	else
6899	link_delay = link_conf->beacon_int *
6900	(link_removal_timeout[link_id] - `1`);
6901
6902	if (!delay)
6903	delay = link_delay;
6904	else
6905	delay = min(delay, link_delay);
6906	}
6907
6908	sdata->u.mgd.removed_links = removed_links;
6909	wiphy_delayed_work_queue(wiphy: sdata->local->hw.wiphy,
6910	dwork: &sdata->u.mgd.ml_reconf_work,
6911	TU_TO_JIFFIES(delay));
6912	}
6913
6914	static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata,
6915	u16 active_links, u16 dormant_links,
6916	u16 suspended_links)
6917	{
6918	u64 changed = `0`;
6919	int ret;
6920
6921	if (!active_links) {
6922	ret = -EINVAL;
6923	goto out;
6924	}
6925
6926	/ If there is an active negotiated TTLM, it should be discarded by*
6927	* the new negotiated/advertised TTLM.
6928	*/
6929	if (sdata->vif.neg_ttlm.valid) {
6930	memset(s: &sdata->vif.neg_ttlm, c: `0`, n: sizeof(sdata->vif.neg_ttlm));
6931	sdata->vif.suspended_links = `0`;
6932	changed = BSS_CHANGED_MLD_TTLM;
6933	}
6934
6935	if (sdata->vif.active_links != active_links) {
6936	/ usable links are affected when active_links are changed,*
6937	* so notify the driver about the status change
6938	*/
6939	changed \|= BSS_CHANGED_MLD_VALID_LINKS;
6940	active_links &= sdata->vif.active_links;
6941	if (!active_links)
6942	active_links =
6943	BIT(__ffs(sdata->vif.valid_links &
6944	~dormant_links));
6945	ret = ieee80211_set_active_links(vif: &sdata->vif, active_links);
6946	if (ret) {
6947	sdata_info(sdata, "Failed to set TTLM active links\n");
6948	goto out;
6949	}
6950	}
6951
6952	ret = ieee80211_vif_set_links(sdata, new_links: sdata->vif.valid_links,
6953	dormant_links);
6954	if (ret) {
6955	sdata_info(sdata, "Failed to set TTLM dormant links\n");
6956	goto out;
6957	}
6958
6959	sdata->vif.suspended_links = suspended_links;
6960	if (sdata->vif.suspended_links)
6961	changed \|= BSS_CHANGED_MLD_TTLM;
6962
6963	ieee80211_vif_cfg_change_notify(sdata, changed);
6964
6965	out:
6966	if (ret)
6967	ieee80211_disconnect(&sdata->vif, false);
6968
6969	return ret;
6970	}
6971
6972	static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy,
6973	struct wiphy_work *work)
6974	{
6975	u16 new_active_links, new_dormant_links;
6976	struct ieee80211_sub_if_data *sdata =
6977	container_of(work, struct ieee80211_sub_if_data,
6978	u.mgd.ttlm_work.work);
6979
6980	new_active_links = sdata->u.mgd.ttlm_info.map &
6981	sdata->vif.valid_links;
6982	new_dormant_links = ~sdata->u.mgd.ttlm_info.map &
6983	sdata->vif.valid_links;
6984
6985	ieee80211_vif_set_links(sdata, new_links: sdata->vif.valid_links, dormant_links: `0`);
6986	if (ieee80211_ttlm_set_links(sdata, active_links: new_active_links, dormant_links: new_dormant_links,
6987	suspended_links: `0`))
6988	return;
6989
6990	sdata->u.mgd.ttlm_info.active = true;
6991	sdata->u.mgd.ttlm_info.switch_time = `0`;
6992	}
6993
6994	static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data)
6995	{
6996	if (bm_size == `1`)
6997	return *data;
6998	else
6999	return get_unaligned_le16(p: data);
7000	}
7001
7002	static int
7003	ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata,
7004	const struct ieee80211_ttlm_elem *ttlm,
7005	struct ieee80211_adv_ttlm_info *ttlm_info)
7006	{
7007	/ The element size was already validated in*
7008	* ieee80211_tid_to_link_map_size_ok()
7009	*/
7010	u8 control, link_map_presence, map_size, tid;
7011	u8 *pos;
7012
7013	memset(s: ttlm_info, c: `0`, n: sizeof(*ttlm_info));
7014	pos = (void *)ttlm->optional;
7015	control = ttlm->control;
7016
7017	if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) \|\|
7018	!(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT))
7019	return `0`;
7020
7021	if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) !=
7022	IEEE80211_TTLM_DIRECTION_BOTH) {
7023	sdata_info(sdata, "Invalid advertised T2L map direction\n");
7024	return -EINVAL;
7025	}
7026
7027	link_map_presence = *pos;
7028	pos++;
7029
7030	ttlm_info->switch_time = get_unaligned_le16(p: pos);
7031
7032	/ Since ttlm_info->switch_time == 0 means no switch time, bump it*
7033	* by 1.
7034	*/
7035	if (!ttlm_info->switch_time)
7036	ttlm_info->switch_time = `1`;
7037
7038	pos += `2`;
7039
7040	if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) {
7041	ttlm_info->duration = pos[`0`] \| pos[`1`] << `8` \| pos[`2`] << `16`;
7042	pos += `3`;
7043	}
7044
7045	if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE)
7046	map_size = `1`;
7047	else
7048	map_size = `2`;
7049
7050	/ According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall*
7051	* not advertise a TID-to-link mapping that does not map all TIDs to the
7052	* same link set, reject frame if not all links have mapping
7053	*/
7054	if (link_map_presence != `0xff`) {
7055	sdata_info(sdata,
7056	"Invalid advertised T2L mapping presence indicator\n");
7057	return -EINVAL;
7058	}
7059
7060	ttlm_info->map = ieee80211_get_ttlm(bm_size: map_size, data: pos);
7061	if (!ttlm_info->map) {
7062	sdata_info(sdata,
7063	"Invalid advertised T2L map for TID 0\n");
7064	return -EINVAL;
7065	}
7066
7067	pos += map_size;
7068
7069	for (tid = `1`; tid < `8`; tid++) {
7070	u16 map = ieee80211_get_ttlm(bm_size: map_size, data: pos);
7071
7072	if (map != ttlm_info->map) {
7073	sdata_info(sdata, "Invalid advertised T2L map for tid %d\n",
7074	tid);
7075	return -EINVAL;
7076	}
7077
7078	pos += map_size;
7079	}
7080	return `0`;
7081	}
7082
7083	static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata,
7084	struct ieee802_11_elems *elems,
7085	u64 beacon_ts)
7086	{
7087	u8 i;
7088	int ret;
7089
7090	if (!ieee80211_vif_is_mld(vif: &sdata->vif))
7091	return;
7092
7093	if (!elems->ttlm_num) {
7094	if (sdata->u.mgd.ttlm_info.switch_time) {
7095	/ if a planned TID-to-link mapping was cancelled -*
7096	* abort it
7097	*/
7098	wiphy_delayed_work_cancel(wiphy: sdata->local->hw.wiphy,
7099	dwork: &sdata->u.mgd.ttlm_work);
7100	} else if (sdata->u.mgd.ttlm_info.active) {
7101	/ if no TID-to-link element, set to default mapping in*
7102	* which all TIDs are mapped to all setup links
7103	*/
7104	ret = ieee80211_vif_set_links(sdata,
7105	new_links: sdata->vif.valid_links,
7106	dormant_links: `0`);
7107	if (ret) {
7108	sdata_info(sdata, "Failed setting valid/dormant links\n");
7109	return;
7110	}
7111	ieee80211_vif_cfg_change_notify(sdata,
7112	changed: BSS_CHANGED_MLD_VALID_LINKS);
7113	}
7114	memset(s: &sdata->u.mgd.ttlm_info, c: `0`,
7115	n: sizeof(sdata->u.mgd.ttlm_info));
7116	return;
7117	}
7118
7119	for (i = `0`; i < elems->ttlm_num; i++) {
7120	struct ieee80211_adv_ttlm_info ttlm_info;
7121	u32 res;
7122
7123	res = ieee80211_parse_adv_t2l(sdata, ttlm: elems->ttlm[i],
7124	ttlm_info: &ttlm_info);
7125
7126	if (res) {
7127	__ieee80211_disconnect(sdata);
7128	return;
7129	}
7130
7131	if (ttlm_info.switch_time) {
7132	u16 beacon_ts_tu, st_tu, delay;
7133	u32 delay_jiffies;
7134	u64 mask;
7135
7136	/ The t2l map switch time is indicated with a partial*
7137	* TSF value (bits 10 to 25), get the partial beacon TS
7138	* as well, and calc the delay to the start time.
7139	*/
7140	mask = GENMASK_ULL(`25`, `10`);
7141	beacon_ts_tu = (beacon_ts & mask) >> `10`;
7142	st_tu = ttlm_info.switch_time;
7143	delay = st_tu - beacon_ts_tu;
7144
7145	/*
7146	* If the switch time is far in the future, then it
7147	* could also be the previous switch still being
7148	* announced.
7149	* We can simply ignore it for now, if it is a future
7150	* switch the AP will continue to announce it anyway.
7151	*/
7152	if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW)
7153	return;
7154
7155	delay_jiffies = TU_TO_JIFFIES(delay);
7156
7157	/ Link switching can take time, so schedule it*
7158	* 100ms before to be ready on time
7159	*/
7160	if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS)
7161	delay_jiffies -=
7162	IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS;
7163	else
7164	delay_jiffies = `0`;
7165
7166	sdata->u.mgd.ttlm_info = ttlm_info;
7167	wiphy_delayed_work_cancel(wiphy: sdata->local->hw.wiphy,
7168	dwork: &sdata->u.mgd.ttlm_work);
7169	wiphy_delayed_work_queue(wiphy: sdata->local->hw.wiphy,
7170	dwork: &sdata->u.mgd.ttlm_work,
7171	delay: delay_jiffies);
7172	return;
7173	}
7174	}
7175	}
7176
7177	static void
7178	ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata,
7179	int reporting_link_id,
7180	struct ieee802_11_elems *elems)
7181	{
7182	const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {};
7183	ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {};
7184	const struct element *sub;
7185	const u8 *subelems;
7186	size_t subelems_len;
7187	u8 common_size;
7188	int link_id;
7189
7190	if (!ieee80211_mle_size_ok(data: (u8 *)elems->ml_basic, len: elems->ml_basic_len))
7191	return;
7192
7193	common_size = ieee80211_mle_common_size(data: (u8 *)elems->ml_basic);
7194	subelems = (u8 *)elems->ml_basic + common_size;
7195	subelems_len = elems->ml_basic_len - common_size;
7196
7197	for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE,
7198	subelems, subelems_len) {
7199	struct ieee80211_mle_per_sta_profile prof = (void* *)sub->data;
7200	struct ieee80211_link_data *link;
7201	ssize_t len;
7202
7203	if (!ieee80211_mle_basic_sta_prof_size_ok(data: sub->data,
7204	len: sub->datalen))
7205	continue;
7206
7207	link_id = le16_get_bits(v: prof->control,
7208	IEEE80211_MLE_STA_CONTROL_LINK_ID);
7209	/ need a valid link ID, but also not our own, both AP bugs /
7210	if (link_id == reporting_link_id \|\|
7211	link_id >= IEEE80211_MLD_MAX_NUM_LINKS)
7212	continue;
7213
7214	link = sdata_dereference(sdata->link[link_id], sdata);
7215	if (!link)
7216	continue;
7217
7218	len = cfg80211_defragment_element(elem: sub, ies: subelems, ieslen: subelems_len,
7219	NULL, data_len: `0`,
7220	frag_id: IEEE80211_MLE_SUBELEM_FRAGMENT);
7221	if (WARN_ON(len < `0`))
7222	continue;
7223
7224	sta_profiles[link_id] = sub;
7225	sta_profiles_len[link_id] = len;
7226	}
7227
7228	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
7229	struct ieee80211_mle_per_sta_profile *prof;
7230	struct ieee802_11_elems *prof_elems;
7231	struct ieee80211_link_data *link;
7232	ssize_t len;
7233
7234	if (link_id == reporting_link_id)
7235	continue;
7236
7237	link = sdata_dereference(sdata->link[link_id], sdata);
7238	if (!link)
7239	continue;
7240
7241	if (!sta_profiles[link_id]) {
7242	prof_elems = NULL;
7243	goto handle;
7244	}
7245
7246	/ we can defragment in-place, won't use the buffer again /
7247	len = cfg80211_defragment_element(elem: sta_profiles[link_id],
7248	ies: subelems, ieslen: subelems_len,
7249	data: (void *)sta_profiles[link_id],
7250	data_len: sta_profiles_len[link_id],
7251	frag_id: IEEE80211_MLE_SUBELEM_FRAGMENT);
7252	if (WARN_ON(len != sta_profiles_len[link_id]))
7253	continue;
7254
7255	prof = (void *)sta_profiles[link_id];
7256	prof_elems = ieee802_11_parse_elems(start: prof->variable +
7257	(prof->sta_info_len - `1`),
7258	len: len -
7259	(prof->sta_info_len - `1`),
7260	action: false, NULL);
7261
7262	/ memory allocation failed - let's hope that's transient /
7263	if (!prof_elems)
7264	continue;
7265
7266	handle:
7267	/*
7268	* FIXME: the timings here are obviously incorrect,
7269	* but only older Intel drivers seem to care, and
7270	* those don't have MLO. If you really need this,
7271	* the problem is having to calculate it with the
7272	* TSF offset etc. The device_timestamp is still
7273	* correct, of course.
7274	*/
7275	ieee80211_sta_process_chanswitch(link, timestamp: `0`, device_timestamp: `0`, full_elems: elems, csa_elems: prof_elems,
7276	source: IEEE80211_CSA_SOURCE_OTHER_LINK);
7277	kfree(objp: prof_elems);
7278	}
7279	}
7280
7281	static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata,
7282	const struct ieee802_11_elems *elems)
7283	{
7284	struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg;
7285	static u8 zero_ssid[IEEE80211_MAX_SSID_LEN];
7286
7287	if (!elems->ssid)
7288	return false;
7289
7290	/ hidden SSID: zero length /
7291	if (elems->ssid_len == `0`)
7292	return false;
7293
7294	if (elems->ssid_len != cfg->ssid_len)
7295	return true;
7296
7297	/ hidden SSID: zeroed out /
7298	if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len))
7299	return false;
7300
7301	return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len);
7302	}
7303
7304	static bool
7305	ieee80211_rx_beacon_freq_valid(struct ieee80211_local *local,
7306	struct ieee80211_mgmt *mgmt,
7307	struct ieee80211_rx_status *rx_status,
7308	struct ieee80211_chanctx_conf *chanctx)
7309	{
7310	u32 pri_2mhz_khz;
7311	struct ieee80211_channel *s1g_sibling_1mhz;
7312	u32 pri_khz = ieee80211_channel_to_khz(chan: chanctx->def.chan);
7313	u32 rx_khz = ieee80211_rx_status_to_khz(rx_status);
7314
7315	if (rx_khz == pri_khz)
7316	return true;
7317
7318	if (!chanctx->def.s1g_primary_2mhz)
7319	return false;
7320
7321	/*
7322	* If we have an S1G interface with a 2MHz primary, beacons are
7323	* sent on the center frequency of the 2MHz primary. Find the sibling
7324	* 1MHz channel and calculate the 2MHz primary center frequency.
7325	*/
7326	s1g_sibling_1mhz = cfg80211_s1g_get_primary_sibling(wiphy: local->hw.wiphy,
7327	chandef: &chanctx->def);
7328	if (!s1g_sibling_1mhz)
7329	return false;
7330
7331	pri_2mhz_khz =
7332	(pri_khz + ieee80211_channel_to_khz(chan: s1g_sibling_1mhz)) / `2`;
7333	return rx_khz == pri_2mhz_khz;
7334	}
7335
7336	static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link,
7337	struct ieee80211_hdr *hdr, size_t len,
7338	struct ieee80211_rx_status *rx_status)
7339	{
7340	struct ieee80211_sub_if_data *sdata = link->sdata;
7341	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7342	struct ieee80211_bss_conf *bss_conf = link->conf;
7343	struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
7344	struct ieee80211_mgmt mgmt = (void* *) hdr;
7345	struct ieee80211_ext *ext = NULL;
7346	size_t baselen;
7347	struct ieee802_11_elems *elems;
7348	struct ieee80211_local *local = sdata->local;
7349	struct ieee80211_chanctx_conf *chanctx_conf;
7350	struct ieee80211_supported_band *sband;
7351	struct ieee80211_channel *chan;
7352	struct link_sta_info *link_sta;
7353	struct sta_info *sta;
7354	u64 changed = `0`;
7355	bool erp_valid;
7356	u8 erp_value = `0`;
7357	u32 ncrc = `0`;
7358	u8 bssid, variable = mgmt->u.beacon.variable;
7359	u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
7360	struct ieee80211_elems_parse_params parse_params = {
7361	.mode = link->u.mgd.conn.mode,
7362	.link_id = -`1`,
7363	.from_ap = true,
7364	};
7365
7366	lockdep_assert_wiphy(local->hw.wiphy);
7367
7368	/ Process beacon from the current BSS /
7369	bssid = ieee80211_get_bssid(hdr, len, type: sdata->vif.type);
7370	if (ieee80211_is_s1g_beacon(fc: mgmt->frame_control)) {
7371	ext = (void *)mgmt;
7372	variable = ext->u.s1g_beacon.variable +
7373	ieee80211_s1g_optional_len(fc: ext->frame_control);
7374	}
7375
7376	baselen = (u8 ) variable - (u8 ) mgmt;
7377	if (baselen > len)
7378	return;
7379
7380	parse_params.start = variable;
7381	parse_params.len = len - baselen;
7382
7383	rcu_read_lock();
7384	chanctx_conf = rcu_dereference(bss_conf->chanctx_conf);
7385	if (!chanctx_conf) {
7386	rcu_read_unlock();
7387	return;
7388	}
7389
7390	if (!ieee80211_rx_beacon_freq_valid(local, mgmt, rx_status,
7391	chanctx: chanctx_conf)) {
7392	rcu_read_unlock();
7393	return;
7394	}
7395	chan = chanctx_conf->def.chan;
7396	rcu_read_unlock();
7397
7398	if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
7399	!WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) &&
7400	ieee80211_rx_our_beacon(tx_bssid: bssid, bss: ifmgd->assoc_data->link[`0`].bss)) {
7401	parse_params.bss = ifmgd->assoc_data->link[`0`].bss;
7402	elems = ieee802_11_parse_elems_full(params: &parse_params);
7403	if (!elems)
7404	return;
7405
7406	ieee80211_rx_bss_info(link, mgmt, len, rx_status);
7407
7408	if (elems->dtim_period)
7409	link->u.mgd.dtim_period = elems->dtim_period;
7410	link->u.mgd.have_beacon = true;
7411	ifmgd->assoc_data->need_beacon = false;
7412	if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
7413	!ieee80211_is_s1g_beacon(fc: hdr->frame_control)) {
7414	bss_conf->sync_tsf =
7415	le64_to_cpu(mgmt->u.beacon.timestamp);
7416	bss_conf->sync_device_ts =
7417	rx_status->device_timestamp;
7418	bss_conf->sync_dtim_count = elems->dtim_count;
7419	}
7420
7421	if (elems->mbssid_config_ie)
7422	bss_conf->profile_periodicity =
7423	elems->mbssid_config_ie->profile_periodicity;
7424	else
7425	bss_conf->profile_periodicity = `0`;
7426
7427	if (elems->ext_capab_len >= `11` &&
7428	(elems->ext_capab[`10`] & WLAN_EXT_CAPA11_EMA_SUPPORT))
7429	bss_conf->ema_ap = true;
7430	else
7431	bss_conf->ema_ap = false;
7432
7433	/ continue assoc process /
7434	ifmgd->assoc_data->timeout = jiffies;
7435	ifmgd->assoc_data->timeout_started = true;
7436	run_again(sdata, timeout: ifmgd->assoc_data->timeout);
7437	kfree(objp: elems);
7438	return;
7439	}
7440
7441	if (!ifmgd->associated \|\|
7442	!ieee80211_rx_our_beacon(tx_bssid: bssid, bss: bss_conf->bss))
7443	return;
7444	bssid = link->u.mgd.bssid;
7445
7446	if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
7447	ieee80211_handle_beacon_sig(link, ifmgd, bss_conf,
7448	local, rx_status);
7449
7450	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
7451	mlme_dbg_ratelimited(sdata,
7452	"cancelling AP probe due to a received beacon\n");
7453	ieee80211_reset_ap_probe(sdata);
7454	}
7455
7456	/*
7457	* Push the beacon loss detection into the future since
7458	* we are processing a beacon from the AP just now.
7459	*/
7460	ieee80211_sta_reset_beacon_monitor(sdata);
7461
7462	/ TODO: CRC urrently not calculated on S1G Beacon Compatibility*
7463	* element (which carries the beacon interval). Don't forget to add a
7464	* bit to care_about_ies[] above if mac80211 is interested in a
7465	* changing S1G element.
7466	*/
7467	if (!ieee80211_is_s1g_beacon(fc: hdr->frame_control))
7468	ncrc = crc32_be(crc: `0`, p: (void *)&mgmt->u.beacon.beacon_int, len: `4`);
7469	parse_params.bss = bss_conf->bss;
7470	parse_params.filter = care_about_ies;
7471	parse_params.crc = ncrc;
7472	elems = ieee802_11_parse_elems_full(params: &parse_params);
7473	if (!elems)
7474	return;
7475
7476	if (rx_status->flag & RX_FLAG_DECRYPTED &&
7477	ieee80211_mgd_ssid_mismatch(sdata, elems)) {
7478	sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n",
7479	sdata->vif.cfg.ap_addr);
7480	__ieee80211_disconnect(sdata);
7481	return;
7482	}
7483
7484	ncrc = elems->crc;
7485
7486	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
7487	ieee80211_check_tim(tim: elems->tim, tim_len: elems->tim_len, aid: vif_cfg->aid,
7488	s1g: vif_cfg->s1g)) {
7489	if (local->hw.conf.dynamic_ps_timeout > `0`) {
7490	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
7491	local->hw.conf.flags &= ~IEEE80211_CONF_PS;
7492	ieee80211_hw_config(local, radio_idx: -`1`,
7493	changed: IEEE80211_CONF_CHANGE_PS);
7494	}
7495	ieee80211_send_nullfunc(local, sdata, powersave: false);
7496	} else if (!local->pspolling && sdata->u.mgd.powersave) {
7497	local->pspolling = true;
7498
7499	/*
7500	* Here is assumed that the driver will be
7501	* able to send ps-poll frame and receive a
7502	* response even though power save mode is
7503	* enabled, but some drivers might require
7504	* to disable power save here. This needs
7505	* to be investigated.
7506	*/
7507	ieee80211_send_pspoll(local, sdata);
7508	}
7509	}
7510
7511	if (sdata->vif.p2p \|\|
7512	sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
7513	struct ieee80211_p2p_noa_attr noa = {};
7514	int ret;
7515
7516	ret = cfg80211_get_p2p_attr(ies: variable,
7517	len: len - baselen,
7518	attr: IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
7519	buf: (u8 ) &noa, bufsize: sizeof*(noa));
7520	if (ret >= `2`) {
7521	if (link->u.mgd.p2p_noa_index != noa.index) {
7522	/ valid noa_attr and index changed /
7523	link->u.mgd.p2p_noa_index = noa.index;
7524	memcpy(to: &bss_conf->p2p_noa_attr, from: &noa, len: sizeof(noa));
7525	changed \|= BSS_CHANGED_P2P_PS;
7526	/*
7527	* make sure we update all information, the CRC
7528	* mechanism doesn't look at P2P attributes.
7529	*/
7530	link->u.mgd.beacon_crc_valid = false;
7531	}
7532	} else if (link->u.mgd.p2p_noa_index != -`1`) {
7533	/ noa_attr not found and we had valid noa_attr before /
7534	link->u.mgd.p2p_noa_index = -`1`;
7535	memset(s: &bss_conf->p2p_noa_attr, c: `0`, n: sizeof(bss_conf->p2p_noa_attr));
7536	changed \|= BSS_CHANGED_P2P_PS;
7537	link->u.mgd.beacon_crc_valid = false;
7538	}
7539	}
7540
7541	/*
7542	* Update beacon timing and dtim count on every beacon appearance. This
7543	* will allow the driver to use the most updated values. Do it before
7544	* comparing this one with last received beacon.
7545	* IMPORTANT: These parameters would possibly be out of sync by the time
7546	* the driver will use them. The synchronized view is currently
7547	* guaranteed only in certain callbacks.
7548	*/
7549	if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
7550	!ieee80211_is_s1g_beacon(fc: hdr->frame_control)) {
7551	bss_conf->sync_tsf =
7552	le64_to_cpu(mgmt->u.beacon.timestamp);
7553	bss_conf->sync_device_ts =
7554	rx_status->device_timestamp;
7555	bss_conf->sync_dtim_count = elems->dtim_count;
7556	}
7557
7558	if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) \|\|
7559	(ext && ieee80211_is_s1g_short_beacon(fc: ext->frame_control,
7560	variable: parse_params.start,
7561	variable_len: parse_params.len)))
7562	goto free;
7563	link->u.mgd.beacon_crc = ncrc;
7564	link->u.mgd.beacon_crc_valid = true;
7565
7566	ieee80211_rx_bss_info(link, mgmt, len, rx_status);
7567
7568	ieee80211_sta_process_chanswitch(link, timestamp: rx_status->mactime,
7569	device_timestamp: rx_status->device_timestamp,
7570	full_elems: elems, csa_elems: elems,
7571	source: IEEE80211_CSA_SOURCE_BEACON);
7572
7573	/ note that after this elems->ml_basic can no longer be used fully /
7574	ieee80211_mgd_check_cross_link_csa(sdata, reporting_link_id: rx_status->link_id, elems);
7575
7576	ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems);
7577
7578	if (!sdata->u.mgd.epcs.enabled &&
7579	!link->u.mgd.disable_wmm_tracking &&
7580	ieee80211_sta_wmm_params(local, link, wmm_param: elems->wmm_param,
7581	wmm_param_len: elems->wmm_param_len,
7582	mu_edca: elems->mu_edca_param_set))
7583	changed \|= BSS_CHANGED_QOS;
7584
7585	/*
7586	* If we haven't had a beacon before, tell the driver about the
7587	* DTIM period (and beacon timing if desired) now.
7588	*/
7589	if (!link->u.mgd.have_beacon) {
7590	/ a few bogus AP send dtim_period = 0 or no TIM IE /
7591	bss_conf->dtim_period = elems->dtim_period ?: `1`;
7592
7593	changed \|= BSS_CHANGED_BEACON_INFO;
7594	link->u.mgd.have_beacon = true;
7595
7596	ieee80211_recalc_ps(local);
7597
7598	ieee80211_recalc_ps_vif(sdata);
7599	}
7600
7601	if (elems->erp_info) {
7602	erp_valid = true;
7603	erp_value = elems->erp_info[`0`];
7604	} else {
7605	erp_valid = false;
7606	}
7607
7608	if (!ieee80211_is_s1g_beacon(fc: hdr->frame_control))
7609	changed \|= ieee80211_handle_bss_capability(link,
7610	le16_to_cpu(mgmt->u.beacon.capab_info),
7611	erp_valid, erp: erp_value);
7612
7613	sta = sta_info_get(sdata, addr: sdata->vif.cfg.ap_addr);
7614	if (WARN_ON(!sta)) {
7615	goto free;
7616	}
7617	link_sta = rcu_dereference_protected(sta->link[link->link_id],
7618	lockdep_is_held(&local->hw.wiphy->mtx));
7619	if (WARN_ON(!link_sta)) {
7620	goto free;
7621	}
7622
7623	if (WARN_ON(!bss_conf->chanreq.oper.chan))
7624	goto free;
7625
7626	sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band];
7627
7628	changed \|= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems);
7629
7630	if (ieee80211_config_bw(link, elems, update: true, changed: &changed,
7631	IEEE80211_STYPE_BEACON)) {
7632	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
7633	reason: WLAN_REASON_DEAUTH_LEAVING,
7634	tx: true, frame_buf: deauth_buf);
7635	ieee80211_report_disconnect(sdata, buf: deauth_buf,
7636	len: sizeof(deauth_buf), tx: true,
7637	reason: WLAN_REASON_DEAUTH_LEAVING,
7638	reconnect: false);
7639	goto free;
7640	}
7641
7642	if (elems->opmode_notif)
7643	ieee80211_vht_handle_opmode(sdata, sta: link_sta,
7644	opmode: *elems->opmode_notif,
7645	band: rx_status->band);
7646
7647	changed \|= ieee80211_handle_pwr_constr(link, channel: chan, mgmt,
7648	country_ie: elems->country_elem,
7649	country_ie_len: elems->country_elem_len,
7650	pwr_constr_ie: elems->pwr_constr_elem,
7651	cisco_dtpc_ie: elems->cisco_dtpc_elem);
7652
7653	ieee80211_ml_reconfiguration(sdata, elems);
7654	ieee80211_process_adv_ttlm(sdata, elems,
7655	le64_to_cpu(mgmt->u.beacon.timestamp));
7656
7657	ieee80211_link_info_change_notify(sdata, link, changed);
7658	free:
7659	kfree(objp: elems);
7660	}
7661
7662	static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata,
7663	struct ieee80211_neg_ttlm neg_ttlm)
7664	{
7665	u16 new_active_links, new_dormant_links, new_suspended_links, map = `0`;
7666	u8 i;
7667
7668	for (i = `0`; i < IEEE80211_TTLM_NUM_TIDS; i++)
7669	map \|= neg_ttlm.downlink[i] \| neg_ttlm.uplink[i];
7670
7671	/ If there is an active TTLM, unset previously suspended links /
7672	if (sdata->vif.neg_ttlm.valid)
7673	sdata->vif.dormant_links &= ~sdata->vif.suspended_links;
7674
7675	/ exclude links that are already disabled by advertised TTLM /
7676	new_active_links =
7677	map & sdata->vif.valid_links & ~sdata->vif.dormant_links;
7678	new_suspended_links =
7679	(~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links;
7680	new_dormant_links = sdata->vif.dormant_links \| new_suspended_links;
7681	if (ieee80211_ttlm_set_links(sdata, active_links: new_active_links,
7682	dormant_links: new_dormant_links, suspended_links: new_suspended_links))
7683	return;
7684
7685	sdata->vif.neg_ttlm = neg_ttlm;
7686	sdata->vif.neg_ttlm.valid = true;
7687	}
7688
7689	static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy,
7690	struct wiphy_work *work)
7691	{
7692	struct ieee80211_sub_if_data *sdata =
7693	container_of(work, struct ieee80211_sub_if_data,
7694	u.mgd.neg_ttlm_timeout_work.work);
7695
7696	sdata_info(sdata,
7697	"No negotiated TTLM response from AP, disconnecting.\n");
7698
7699	__ieee80211_disconnect(sdata);
7700	}
7701
7702	static void
7703	ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb,
7704	struct ieee80211_neg_ttlm *neg_ttlm)
7705	{
7706	u8 i, direction[IEEE80211_TTLM_MAX_CNT];
7707
7708	if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink,
7709	sizeof(neg_ttlm->downlink))) {
7710	direction[`0`] = IEEE80211_TTLM_DIRECTION_DOWN;
7711	direction[`1`] = IEEE80211_TTLM_DIRECTION_UP;
7712	} else {
7713	direction[`0`] = IEEE80211_TTLM_DIRECTION_BOTH;
7714	}
7715
7716	for (i = `0`; i < ARRAY_SIZE(direction); i++) {
7717	u8 tid, len, map_ind = `0`, len_pos, map_ind_pos, *pos;
7718	__le16 map;
7719
7720	len = sizeof(struct ieee80211_ttlm_elem) + `1` + `1`;
7721
7722	pos = skb_put(skb, len: len + `2`);
7723	*pos++ = WLAN_EID_EXTENSION;
7724	len_pos = pos++;
7725	*pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING;
7726	*pos++ = direction[i];
7727	map_ind_pos = pos++;
7728	for (tid = `0`; tid < IEEE80211_TTLM_NUM_TIDS; tid++) {
7729	map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ?
7730	cpu_to_le16(neg_ttlm->uplink[tid]) :
7731	cpu_to_le16(neg_ttlm->downlink[tid]);
7732	if (!map)
7733	continue;
7734
7735	len += `2`;
7736	map_ind \|= BIT(tid);
7737	skb_put_data(skb, data: &map, len: sizeof(map));
7738	}
7739
7740	*map_ind_pos = map_ind;
7741	*len_pos = len;
7742
7743	if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH)
7744	break;
7745	}
7746	}
7747
7748	static void
7749	ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata,
7750	struct ieee80211_neg_ttlm *neg_ttlm,
7751	u8 dialog_token)
7752	{
7753	struct ieee80211_local *local = sdata->local;
7754	struct ieee80211_mgmt *mgmt;
7755	struct sk_buff *skb;
7756	int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req);
7757	int ttlm_max_len = `2` + `1` + sizeof(struct ieee80211_ttlm_elem) + `1` +
7758	`2` * `2` * IEEE80211_TTLM_NUM_TIDS;
7759
7760	skb = dev_alloc_skb(length: local->tx_headroom + hdr_len + ttlm_max_len);
7761	if (!skb)
7762	return;
7763
7764	skb_reserve(skb, len: local->tx_headroom);
7765	mgmt = skb_put_zero(skb, len: hdr_len);
7766	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT \|
7767	IEEE80211_STYPE_ACTION);
7768	memcpy(to: mgmt->da, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
7769	memcpy(to: mgmt->sa, from: sdata->vif.addr, ETH_ALEN);
7770	memcpy(to: mgmt->bssid, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
7771
7772	mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT;
7773	mgmt->u.action.u.ttlm_req.action_code =
7774	WLAN_PROTECTED_EHT_ACTION_TTLM_REQ;
7775	mgmt->u.action.u.ttlm_req.dialog_token = dialog_token;
7776	ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm);
7777	ieee80211_tx_skb(sdata, skb);
7778	}
7779
7780	int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata,
7781	struct cfg80211_ttlm_params *params)
7782	{
7783	struct ieee80211_neg_ttlm neg_ttlm = {};
7784	u8 i;
7785
7786	if (!ieee80211_vif_is_mld(vif: &sdata->vif) \|\|
7787	!(sdata->vif.cfg.mld_capa_op &
7788	IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP))
7789	return -EINVAL;
7790
7791	for (i = `0`; i < IEEE80211_TTLM_NUM_TIDS; i++) {
7792	if ((params->dlink[i] & ~sdata->vif.valid_links) \|\|
7793	(params->ulink[i] & ~sdata->vif.valid_links))
7794	return -EINVAL;
7795
7796	neg_ttlm.downlink[i] = params->dlink[i];
7797	neg_ttlm.uplink[i] = params->ulink[i];
7798	}
7799
7800	if (drv_can_neg_ttlm(local: sdata->local, sdata, neg_ttlm: &neg_ttlm) !=
7801	NEG_TTLM_RES_ACCEPT)
7802	return -EINVAL;
7803
7804	ieee80211_apply_neg_ttlm(sdata, neg_ttlm);
7805	sdata->u.mgd.dialog_token_alloc++;
7806	ieee80211_send_neg_ttlm_req(sdata, neg_ttlm: &sdata->vif.neg_ttlm,
7807	dialog_token: sdata->u.mgd.dialog_token_alloc);
7808	wiphy_delayed_work_cancel(wiphy: sdata->local->hw.wiphy,
7809	dwork: &sdata->u.mgd.neg_ttlm_timeout_work);
7810	wiphy_delayed_work_queue(wiphy: sdata->local->hw.wiphy,
7811	dwork: &sdata->u.mgd.neg_ttlm_timeout_work,
7812	IEEE80211_NEG_TTLM_REQ_TIMEOUT);
7813	return `0`;
7814	}
7815
7816	static void
7817	ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata,
7818	enum ieee80211_neg_ttlm_res ttlm_res,
7819	u8 dialog_token,
7820	struct ieee80211_neg_ttlm *neg_ttlm)
7821	{
7822	struct ieee80211_local *local = sdata->local;
7823	struct ieee80211_mgmt *mgmt;
7824	struct sk_buff *skb;
7825	int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res);
7826	int ttlm_max_len = `2` + `1` + sizeof(struct ieee80211_ttlm_elem) + `1` +
7827	`2` * `2` * IEEE80211_TTLM_NUM_TIDS;
7828	u16 status_code;
7829
7830	skb = dev_alloc_skb(length: local->tx_headroom + hdr_len + ttlm_max_len);
7831	if (!skb)
7832	return;
7833
7834	skb_reserve(skb, len: local->tx_headroom);
7835	mgmt = skb_put_zero(skb, len: hdr_len);
7836	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT \|
7837	IEEE80211_STYPE_ACTION);
7838	memcpy(to: mgmt->da, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
7839	memcpy(to: mgmt->sa, from: sdata->vif.addr, ETH_ALEN);
7840	memcpy(to: mgmt->bssid, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
7841
7842	mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT;
7843	mgmt->u.action.u.ttlm_res.action_code =
7844	WLAN_PROTECTED_EHT_ACTION_TTLM_RES;
7845	mgmt->u.action.u.ttlm_res.dialog_token = dialog_token;
7846	switch (ttlm_res) {
7847	default:
7848	WARN_ON(`1`);
7849	fallthrough;
7850	case NEG_TTLM_RES_REJECT:
7851	status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING;
7852	break;
7853	case NEG_TTLM_RES_ACCEPT:
7854	status_code = WLAN_STATUS_SUCCESS;
7855	break;
7856	case NEG_TTLM_RES_SUGGEST_PREFERRED:
7857	status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED;
7858	ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm);
7859	break;
7860	}
7861
7862	mgmt->u.action.u.ttlm_res.status_code = cpu_to_le16(status_code);
7863	ieee80211_tx_skb(sdata, skb);
7864	}
7865
7866	static int
7867	ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata,
7868	const struct ieee80211_ttlm_elem *ttlm,
7869	struct ieee80211_neg_ttlm *neg_ttlm,
7870	u8 *direction)
7871	{
7872	u8 control, link_map_presence, map_size, tid;
7873	u8 *pos;
7874
7875	/ The element size was already validated in*
7876	* ieee80211_tid_to_link_map_size_ok()
7877	*/
7878	pos = (void *)ttlm->optional;
7879
7880	control = ttlm->control;
7881
7882	/ mapping switch time and expected duration fields are not expected*
7883	* in case of negotiated TTLM
7884	*/
7885	if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT \|
7886	IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) {
7887	mlme_dbg(sdata,
7888	"Invalid TTLM element in negotiated TTLM request\n");
7889	return -EINVAL;
7890	}
7891
7892	if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) {
7893	for (tid = `0`; tid < IEEE80211_TTLM_NUM_TIDS; tid++) {
7894	neg_ttlm->downlink[tid] = sdata->vif.valid_links;
7895	neg_ttlm->uplink[tid] = sdata->vif.valid_links;
7896	}
7897	*direction = IEEE80211_TTLM_DIRECTION_BOTH;
7898	return `0`;
7899	}
7900
7901	*direction = u8_get_bits(v: control, IEEE80211_TTLM_CONTROL_DIRECTION);
7902	if (*direction != IEEE80211_TTLM_DIRECTION_DOWN &&
7903	*direction != IEEE80211_TTLM_DIRECTION_UP &&
7904	*direction != IEEE80211_TTLM_DIRECTION_BOTH)
7905	return -EINVAL;
7906
7907	link_map_presence = *pos;
7908	pos++;
7909
7910	if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE)
7911	map_size = `1`;
7912	else
7913	map_size = `2`;
7914
7915	for (tid = `0`; tid < IEEE80211_TTLM_NUM_TIDS; tid++) {
7916	u16 map;
7917
7918	if (link_map_presence & BIT(tid)) {
7919	map = ieee80211_get_ttlm(bm_size: map_size, data: pos);
7920	if (!map) {
7921	mlme_dbg(sdata,
7922	"No active links for TID %d", tid);
7923	return -EINVAL;
7924	}
7925	} else {
7926	map = `0`;
7927	}
7928
7929	switch (*direction) {
7930	case IEEE80211_TTLM_DIRECTION_BOTH:
7931	neg_ttlm->downlink[tid] = map;
7932	neg_ttlm->uplink[tid] = map;
7933	break;
7934	case IEEE80211_TTLM_DIRECTION_DOWN:
7935	neg_ttlm->downlink[tid] = map;
7936	break;
7937	case IEEE80211_TTLM_DIRECTION_UP:
7938	neg_ttlm->uplink[tid] = map;
7939	break;
7940	default:
7941	return -EINVAL;
7942	}
7943	pos += map_size;
7944	}
7945	return `0`;
7946	}
7947
7948	void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata,
7949	struct ieee80211_mgmt *mgmt, size_t len)
7950	{
7951	u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i;
7952	size_t ies_len;
7953	enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT;
7954	struct ieee802_11_elems *elems = NULL;
7955	struct ieee80211_neg_ttlm neg_ttlm = {};
7956
7957	BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm));
7958
7959	if (!ieee80211_vif_is_mld(vif: &sdata->vif))
7960	return;
7961
7962	dialog_token = mgmt->u.action.u.ttlm_req.dialog_token;
7963	ies_len = len - offsetof(struct ieee80211_mgmt,
7964	u.action.u.ttlm_req.variable);
7965	elems = ieee802_11_parse_elems(start: mgmt->u.action.u.ttlm_req.variable,
7966	len: ies_len, action: true, NULL);
7967	if (!elems) {
7968	ttlm_res = NEG_TTLM_RES_REJECT;
7969	goto out;
7970	}
7971
7972	for (i = `0`; i < elems->ttlm_num; i++) {
7973	if (ieee80211_parse_neg_ttlm(sdata, ttlm: elems->ttlm[i],
7974	neg_ttlm: &neg_ttlm, direction: &direction[i]) \|\|
7975	(direction[i] == IEEE80211_TTLM_DIRECTION_BOTH &&
7976	elems->ttlm_num != `1`)) {
7977	ttlm_res = NEG_TTLM_RES_REJECT;
7978	goto out;
7979	}
7980	}
7981
7982	if (!elems->ttlm_num \|\|
7983	(elems->ttlm_num == `2` && direction[`0`] == direction[`1`])) {
7984	ttlm_res = NEG_TTLM_RES_REJECT;
7985	goto out;
7986	}
7987
7988	for (i = `0`; i < IEEE80211_TTLM_NUM_TIDS; i++) {
7989	if ((neg_ttlm.downlink[i] &&
7990	(neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) \|\|
7991	(neg_ttlm.uplink[i] &&
7992	(neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) {
7993	ttlm_res = NEG_TTLM_RES_REJECT;
7994	goto out;
7995	}
7996	}
7997
7998	ttlm_res = drv_can_neg_ttlm(local: sdata->local, sdata, neg_ttlm: &neg_ttlm);
7999
8000	if (ttlm_res != NEG_TTLM_RES_ACCEPT)
8001	goto out;
8002
8003	ieee80211_apply_neg_ttlm(sdata, neg_ttlm);
8004	out:
8005	kfree(objp: elems);
8006	ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, neg_ttlm: &neg_ttlm);
8007	}
8008
8009	void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata,
8010	struct ieee80211_mgmt *mgmt, size_t len)
8011	{
8012	if (!ieee80211_vif_is_mld(vif: &sdata->vif) \|\|
8013	mgmt->u.action.u.ttlm_req.dialog_token !=
8014	sdata->u.mgd.dialog_token_alloc)
8015	return;
8016
8017	wiphy_delayed_work_cancel(wiphy: sdata->local->hw.wiphy,
8018	dwork: &sdata->u.mgd.neg_ttlm_timeout_work);
8019
8020	/ MLD station sends a TID to link mapping request, mainly to handle*
8021	* BTM (BSS transition management) request, in which case it needs to
8022	* restrict the active links set.
8023	* In this case it's not expected that the MLD AP will reject the
8024	* negotiated TTLM request.
8025	* This can be better implemented in the future, to handle request
8026	* rejections.
8027	*/
8028	if (le16_to_cpu(mgmt->u.action.u.ttlm_res.status_code) != WLAN_STATUS_SUCCESS)
8029	__ieee80211_disconnect(sdata);
8030	}
8031
8032	void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata)
8033	{
8034	u16 new_dormant_links;
8035
8036	if (!sdata->vif.neg_ttlm.valid)
8037	return;
8038
8039	memset(s: &sdata->vif.neg_ttlm, c: `0`, n: sizeof(sdata->vif.neg_ttlm));
8040	new_dormant_links =
8041	sdata->vif.dormant_links & ~sdata->vif.suspended_links;
8042	sdata->vif.suspended_links = `0`;
8043	ieee80211_vif_set_links(sdata, new_links: sdata->vif.valid_links,
8044	dormant_links: new_dormant_links);
8045	ieee80211_vif_cfg_change_notify(sdata, changed: BSS_CHANGED_MLD_TTLM \|
8046	BSS_CHANGED_MLD_VALID_LINKS);
8047	}
8048
8049	static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy,
8050	struct wiphy_work *work)
8051	{
8052	struct ieee80211_sub_if_data *sdata =
8053	container_of(work, struct ieee80211_sub_if_data,
8054	u.mgd.teardown_ttlm_work);
8055
8056	ieee80211_process_ttlm_teardown(sdata);
8057	}
8058
8059	void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif)
8060	{
8061	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
8062	struct ieee80211_local *local = sdata->local;
8063	struct ieee80211_mgmt *mgmt;
8064	struct sk_buff *skb;
8065	int frame_len = offsetofend(struct ieee80211_mgmt,
8066	u.action.u.ttlm_tear_down);
8067	struct ieee80211_tx_info *info;
8068
8069	skb = dev_alloc_skb(length: local->hw.extra_tx_headroom + frame_len);
8070	if (!skb)
8071	return;
8072
8073	skb_reserve(skb, len: local->hw.extra_tx_headroom);
8074	mgmt = skb_put_zero(skb, len: frame_len);
8075	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT \|
8076	IEEE80211_STYPE_ACTION);
8077	memcpy(to: mgmt->da, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
8078	memcpy(to: mgmt->sa, from: sdata->vif.addr, ETH_ALEN);
8079	memcpy(to: mgmt->bssid, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
8080
8081	mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT;
8082	mgmt->u.action.u.ttlm_tear_down.action_code =
8083	WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN;
8084
8085	info = IEEE80211_SKB_CB(skb);
8086	info->flags \|= IEEE80211_TX_CTL_REQ_TX_STATUS;
8087	info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM;
8088	ieee80211_tx_skb(sdata, skb);
8089	}
8090	EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm);
8091
8092	void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
8093	struct sk_buff *skb)
8094	{
8095	struct ieee80211_link_data *link = &sdata->deflink;
8096	struct ieee80211_rx_status *rx_status;
8097	struct ieee80211_hdr *hdr;
8098	u16 fc;
8099
8100	lockdep_assert_wiphy(sdata->local->hw.wiphy);
8101
8102	rx_status = (struct ieee80211_rx_status *) skb->cb;
8103	hdr = (struct ieee80211_hdr *) skb->data;
8104	fc = le16_to_cpu(hdr->frame_control);
8105
8106	switch (fc & IEEE80211_FCTL_STYPE) {
8107	case IEEE80211_STYPE_S1G_BEACON:
8108	ieee80211_rx_mgmt_beacon(link, hdr, len: skb->len, rx_status);
8109	break;
8110	}
8111	}
8112
8113	void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
8114	struct sk_buff *skb)
8115	{
8116	struct ieee80211_link_data *link = &sdata->deflink;
8117	struct ieee80211_rx_status *rx_status;
8118	struct ieee802_11_elems *elems;
8119	struct ieee80211_mgmt *mgmt;
8120	u16 fc;
8121	int ies_len;
8122
8123	lockdep_assert_wiphy(sdata->local->hw.wiphy);
8124
8125	rx_status = (struct ieee80211_rx_status *) skb->cb;
8126	mgmt = (struct ieee80211_mgmt *) skb->data;
8127	fc = le16_to_cpu(mgmt->frame_control);
8128
8129	if (rx_status->link_valid) {
8130	link = sdata_dereference(sdata->link[rx_status->link_id],
8131	sdata);
8132	if (!link)
8133	return;
8134	}
8135
8136	switch (fc & IEEE80211_FCTL_STYPE) {
8137	case IEEE80211_STYPE_BEACON:
8138	ieee80211_rx_mgmt_beacon(link, hdr: (void *)mgmt,
8139	len: skb->len, rx_status);
8140	break;
8141	case IEEE80211_STYPE_PROBE_RESP:
8142	ieee80211_rx_mgmt_probe_resp(link, skb);
8143	break;
8144	case IEEE80211_STYPE_AUTH:
8145	ieee80211_rx_mgmt_auth(sdata, mgmt, len: skb->len);
8146	break;
8147	case IEEE80211_STYPE_DEAUTH:
8148	ieee80211_rx_mgmt_deauth(sdata, mgmt, len: skb->len);
8149	break;
8150	case IEEE80211_STYPE_DISASSOC:
8151	ieee80211_rx_mgmt_disassoc(sdata, mgmt, len: skb->len);
8152	break;
8153	case IEEE80211_STYPE_ASSOC_RESP:
8154	case IEEE80211_STYPE_REASSOC_RESP:
8155	ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, len: skb->len);
8156	break;
8157	case IEEE80211_STYPE_ACTION:
8158	if (!sdata->u.mgd.associated \|\|
8159	!ether_addr_equal(addr1: mgmt->bssid, addr2: sdata->vif.cfg.ap_addr))
8160	break;
8161
8162	switch (mgmt->u.action.category) {
8163	case WLAN_CATEGORY_SPECTRUM_MGMT:
8164	ies_len = skb->len -
8165	offsetof(struct ieee80211_mgmt,
8166	u.action.u.chan_switch.variable);
8167
8168	if (ies_len < `0`)
8169	break;
8170
8171	/ CSA IE cannot be overridden, no need for BSSID /
8172	elems = ieee802_11_parse_elems(
8173	start: mgmt->u.action.u.chan_switch.variable,
8174	len: ies_len, action: true, NULL);
8175
8176	if (elems && !elems->parse_error) {
8177	enum ieee80211_csa_source src =
8178	IEEE80211_CSA_SOURCE_PROT_ACTION;
8179
8180	ieee80211_sta_process_chanswitch(link,
8181	timestamp: rx_status->mactime,
8182	device_timestamp: rx_status->device_timestamp,
8183	full_elems: elems, csa_elems: elems,
8184	source: src);
8185	}
8186	kfree(objp: elems);
8187	break;
8188	case WLAN_CATEGORY_PUBLIC:
8189	case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION:
8190	ies_len = skb->len -
8191	offsetof(struct ieee80211_mgmt,
8192	u.action.u.ext_chan_switch.variable);
8193
8194	if (ies_len < `0`)
8195	break;
8196
8197	/*
8198	* extended CSA IE can't be overridden, no need for
8199	* BSSID
8200	*/
8201	elems = ieee802_11_parse_elems(
8202	start: mgmt->u.action.u.ext_chan_switch.variable,
8203	len: ies_len, action: true, NULL);
8204
8205	if (elems && !elems->parse_error) {
8206	enum ieee80211_csa_source src;
8207
8208	if (mgmt->u.action.category ==
8209	WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION)
8210	src = IEEE80211_CSA_SOURCE_PROT_ACTION;
8211	else
8212	src = IEEE80211_CSA_SOURCE_UNPROT_ACTION;
8213
8214	/ for the handling code pretend it was an IE /
8215	elems->ext_chansw_ie =
8216	&mgmt->u.action.u.ext_chan_switch.data;
8217
8218	ieee80211_sta_process_chanswitch(link,
8219	timestamp: rx_status->mactime,
8220	device_timestamp: rx_status->device_timestamp,
8221	full_elems: elems, csa_elems: elems,
8222	source: src);
8223	}
8224
8225	kfree(objp: elems);
8226	break;
8227	}
8228	break;
8229	}
8230	}
8231
8232	static void ieee80211_sta_timer(struct timer_list *t)
8233	{
8234	struct ieee80211_sub_if_data *sdata =
8235	timer_container_of(sdata, t, u.mgd.timer);
8236
8237	wiphy_work_queue(wiphy: sdata->local->hw.wiphy, work: &sdata->work);
8238	}
8239
8240	void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
8241	u8 reason, bool tx)
8242	{
8243	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
8244
8245	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
8246	tx, frame_buf);
8247
8248	ieee80211_report_disconnect(sdata, buf: frame_buf, len: sizeof(frame_buf), tx: true,
8249	reason, reconnect: false);
8250	}
8251
8252	static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
8253	{
8254	struct ieee80211_local *local = sdata->local;
8255	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8256	struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
8257	u32 tx_flags = `0`;
8258	u16 trans = `1`;
8259	u16 status = `0`;
8260	struct ieee80211_prep_tx_info info = {
8261	.subtype = IEEE80211_STYPE_AUTH,
8262	};
8263
8264	lockdep_assert_wiphy(sdata->local->hw.wiphy);
8265
8266	if (WARN_ON_ONCE(!auth_data))
8267	return -EINVAL;
8268
8269	auth_data->tries++;
8270
8271	if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
8272	sdata_info(sdata, "authentication with %pM timed out\n",
8273	auth_data->ap_addr);
8274
8275	/*
8276	* Most likely AP is not in the range so remove the
8277	* bss struct for that AP.
8278	*/
8279	cfg80211_unlink_bss(wiphy: local->hw.wiphy, bss: auth_data->bss);
8280
8281	return -ETIMEDOUT;
8282	}
8283
8284	if (auth_data->algorithm == WLAN_AUTH_SAE)
8285	info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
8286
8287	info.link_id = auth_data->link_id;
8288	drv_mgd_prepare_tx(local, sdata, info: &info);
8289
8290	sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
8291	auth_data->ap_addr, auth_data->tries,
8292	IEEE80211_AUTH_MAX_TRIES);
8293
8294	auth_data->expected_transaction = `2`;
8295
8296	if (auth_data->algorithm == WLAN_AUTH_SAE) {
8297	trans = auth_data->sae_trans;
8298	status = auth_data->sae_status;
8299	auth_data->expected_transaction = trans;
8300	}
8301
8302	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
8303	tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS \|
8304	IEEE80211_TX_INTFL_MLME_CONN_TX;
8305
8306	ieee80211_send_auth(sdata, transaction: trans, auth_alg: auth_data->algorithm, status,
8307	extra: auth_data->data, extra_len: auth_data->data_len,
8308	bssid: auth_data->ap_addr, da: auth_data->ap_addr,
8309	NULL, key_len: `0`, key_idx: `0`, tx_flags);
8310
8311	if (tx_flags == `0`) {
8312	if (auth_data->algorithm == WLAN_AUTH_SAE)
8313	auth_data->timeout = jiffies +
8314	IEEE80211_AUTH_TIMEOUT_SAE;
8315	else
8316	auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
8317	} else {
8318	auth_data->timeout =
8319	round_jiffies_up(j: jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
8320	}
8321
8322	auth_data->timeout_started = true;
8323	run_again(sdata, timeout: auth_data->timeout);
8324
8325	return `0`;
8326	}
8327
8328	static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
8329	{
8330	struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
8331	struct ieee80211_local *local = sdata->local;
8332	int ret;
8333
8334	lockdep_assert_wiphy(sdata->local->hw.wiphy);
8335
8336	assoc_data->tries++;
8337	assoc_data->comeback = false;
8338	if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
8339	sdata_info(sdata, "association with %pM timed out\n",
8340	assoc_data->ap_addr);
8341
8342	/*
8343	* Most likely AP is not in the range so remove the
8344	* bss struct for that AP.
8345	*/
8346	cfg80211_unlink_bss(wiphy: local->hw.wiphy,
8347	bss: assoc_data->link[assoc_data->assoc_link_id].bss);
8348
8349	return -ETIMEDOUT;
8350	}
8351
8352	sdata_info(sdata, "associate with %pM (try %d/%d)\n",
8353	assoc_data->ap_addr, assoc_data->tries,
8354	IEEE80211_ASSOC_MAX_TRIES);
8355	ret = ieee80211_send_assoc(sdata);
8356	if (ret)
8357	return ret;
8358
8359	if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
8360	assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
8361	assoc_data->timeout_started = true;
8362	run_again(sdata, timeout: assoc_data->timeout);
8363	} else {
8364	assoc_data->timeout =
8365	round_jiffies_up(j: jiffies +
8366	IEEE80211_ASSOC_TIMEOUT_LONG);
8367	assoc_data->timeout_started = true;
8368	run_again(sdata, timeout: assoc_data->timeout);
8369	}
8370
8371	return `0`;
8372	}
8373
8374	void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
8375	__le16 fc, bool acked)
8376	{
8377	struct ieee80211_local *local = sdata->local;
8378
8379	sdata->u.mgd.status_fc = fc;
8380	sdata->u.mgd.status_acked = acked;
8381	sdata->u.mgd.status_received = true;
8382
8383	wiphy_work_queue(wiphy: local->hw.wiphy, work: &sdata->work);
8384	}
8385
8386	void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
8387	{
8388	struct ieee80211_local *local = sdata->local;
8389	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8390
8391	lockdep_assert_wiphy(sdata->local->hw.wiphy);
8392
8393	if (ifmgd->status_received) {
8394	__le16 fc = ifmgd->status_fc;
8395	bool status_acked = ifmgd->status_acked;
8396
8397	ifmgd->status_received = false;
8398	if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
8399	if (status_acked) {
8400	if (ifmgd->auth_data->algorithm ==
8401	WLAN_AUTH_SAE)
8402	ifmgd->auth_data->timeout =
8403	jiffies +
8404	IEEE80211_AUTH_TIMEOUT_SAE;
8405	else
8406	ifmgd->auth_data->timeout =
8407	jiffies +
8408	IEEE80211_AUTH_TIMEOUT_SHORT;
8409	run_again(sdata, timeout: ifmgd->auth_data->timeout);
8410	} else {
8411	ifmgd->auth_data->timeout = jiffies - `1`;
8412	}
8413	ifmgd->auth_data->timeout_started = true;
8414	} else if (ifmgd->assoc_data &&
8415	!ifmgd->assoc_data->comeback &&
8416	(ieee80211_is_assoc_req(fc) \|\|
8417	ieee80211_is_reassoc_req(fc))) {
8418	/*
8419	* Update association timeout based on the TX status
8420	* for the (Re)Association Request frame. Skip this if
8421	* we have already processed a (Re)Association Response
8422	* frame that indicated need for association comeback
8423	* at a specific time in the future. This could happen
8424	* if the TX status information is delayed enough for
8425	* the response to be received and processed first.
8426	*/
8427	if (status_acked) {
8428	ifmgd->assoc_data->timeout =
8429	jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8430	run_again(sdata, timeout: ifmgd->assoc_data->timeout);
8431	} else {
8432	ifmgd->assoc_data->timeout = jiffies - `1`;
8433	}
8434	ifmgd->assoc_data->timeout_started = true;
8435	}
8436	}
8437
8438	if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
8439	time_after(jiffies, ifmgd->auth_data->timeout)) {
8440	if (ifmgd->auth_data->done \|\| ifmgd->auth_data->waiting) {
8441	/*
8442	* ok ... we waited for assoc or continuation but
8443	* userspace didn't do it, so kill the auth data
8444	*/
8445	ieee80211_destroy_auth_data(sdata, assoc: false);
8446	} else if (ieee80211_auth(sdata)) {
8447	u8 ap_addr[ETH_ALEN];
8448	struct ieee80211_event event = {
8449	.type = MLME_EVENT,
8450	.u.mlme.data = AUTH_EVENT,
8451	.u.mlme.status = MLME_TIMEOUT,
8452	};
8453
8454	memcpy(to: ap_addr, from: ifmgd->auth_data->ap_addr, ETH_ALEN);
8455
8456	ieee80211_destroy_auth_data(sdata, assoc: false);
8457
8458	cfg80211_auth_timeout(dev: sdata->dev, addr: ap_addr);
8459	drv_event_callback(local: sdata->local, sdata, event: &event);
8460	}
8461	} else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8462	run_again(sdata, timeout: ifmgd->auth_data->timeout);
8463
8464	if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
8465	time_after(jiffies, ifmgd->assoc_data->timeout)) {
8466	if ((ifmgd->assoc_data->need_beacon &&
8467	!sdata->deflink.u.mgd.have_beacon) \|\|
8468	ieee80211_do_assoc(sdata)) {
8469	struct ieee80211_event event = {
8470	.type = MLME_EVENT,
8471	.u.mlme.data = ASSOC_EVENT,
8472	.u.mlme.status = MLME_TIMEOUT,
8473	};
8474
8475	ieee80211_destroy_assoc_data(sdata, status: ASSOC_TIMEOUT);
8476	drv_event_callback(local: sdata->local, sdata, event: &event);
8477	}
8478	} else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8479	run_again(sdata, timeout: ifmgd->assoc_data->timeout);
8480
8481	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
8482	ifmgd->associated) {
8483	u8 *bssid = sdata->deflink.u.mgd.bssid;
8484	int max_tries;
8485
8486	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
8487	max_tries = max_nullfunc_tries;
8488	else
8489	max_tries = max_probe_tries;
8490
8491	/ ACK received for nullfunc probing frame /
8492	if (!ifmgd->probe_send_count)
8493	ieee80211_reset_ap_probe(sdata);
8494	else if (ifmgd->nullfunc_failed) {
8495	if (ifmgd->probe_send_count < max_tries) {
8496	mlme_dbg(sdata,
8497	"No ack for nullfunc frame to AP %pM, try %d/%i\n",
8498	bssid, ifmgd->probe_send_count,
8499	max_tries);
8500	ieee80211_mgd_probe_ap_send(sdata);
8501	} else {
8502	mlme_dbg(sdata,
8503	"No ack for nullfunc frame to AP %pM, disconnecting.\n",
8504	bssid);
8505	ieee80211_sta_connection_lost(sdata,
8506	reason: WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
8507	tx: false);
8508	}
8509	} else if (time_is_after_jiffies(ifmgd->probe_timeout))
8510	run_again(sdata, timeout: ifmgd->probe_timeout);
8511	else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
8512	mlme_dbg(sdata,
8513	"Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
8514	bssid, probe_wait_ms);
8515	ieee80211_sta_connection_lost(sdata,
8516	reason: WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, tx: false);
8517	} else if (ifmgd->probe_send_count < max_tries) {
8518	mlme_dbg(sdata,
8519	"No probe response from AP %pM after %dms, try %d/%i\n",
8520	bssid, probe_wait_ms,
8521	ifmgd->probe_send_count, max_tries);
8522	ieee80211_mgd_probe_ap_send(sdata);
8523	} else {
8524	/*
8525	* We actually lost the connection ... or did we?
8526	* Let's make sure!
8527	*/
8528	mlme_dbg(sdata,
8529	"No probe response from AP %pM after %dms, disconnecting.\n",
8530	bssid, probe_wait_ms);
8531
8532	ieee80211_sta_connection_lost(sdata,
8533	reason: WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, tx: false);
8534	}
8535	}
8536	}
8537
8538	static bool
8539	ieee80211_is_csa_in_progress(struct ieee80211_sub_if_data *sdata)
8540	{
8541	/*
8542	* In MLO, check the CSA flags 'active' and 'waiting_bcn' for all
8543	* the links.
8544	*/
8545	struct ieee80211_link_data *link;
8546
8547	guard(rcu)();
8548
8549	for_each_link_data_rcu(sdata, link) {
8550	if (!(link->conf->csa_active &&
8551	!link->u.mgd.csa.waiting_bcn))
8552	return false;
8553	}
8554
8555	return true;
8556	}
8557
8558	static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
8559	{
8560	struct ieee80211_sub_if_data *sdata =
8561	timer_container_of(sdata, t, u.mgd.bcn_mon_timer);
8562
8563	if (ieee80211_is_csa_in_progress(sdata))
8564	return;
8565
8566	if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
8567	return;
8568
8569	sdata->u.mgd.connection_loss = false;
8570	wiphy_work_queue(wiphy: sdata->local->hw.wiphy,
8571	work: &sdata->u.mgd.beacon_connection_loss_work);
8572	}
8573
8574	static unsigned long
8575	ieee80211_latest_active_link_conn_timeout(struct ieee80211_sub_if_data *sdata)
8576	{
8577	unsigned long latest_timeout = jiffies;
8578	unsigned int link_id;
8579	struct sta_info *sta;
8580
8581	guard(rcu)();
8582
8583	sta = sta_info_get(sdata, addr: sdata->vif.cfg.ap_addr);
8584	if (!sta)
8585	return `0`;
8586
8587	for (link_id = `0`; link_id < ARRAY_SIZE(sta->link);
8588	link_id++) {
8589	struct link_sta_info *link_sta;
8590	unsigned long timeout;
8591
8592	link_sta = rcu_dereference(sta->link[link_id]);
8593	if (!link_sta)
8594	continue;
8595
8596	timeout = link_sta->status_stats.last_ack;
8597	if (time_before(timeout, link_sta->rx_stats.last_rx))
8598	timeout = link_sta->rx_stats.last_rx;
8599
8600	timeout += IEEE80211_CONNECTION_IDLE_TIME;
8601
8602	/*
8603	* latest_timeout holds the timeout of the link
8604	* that will expire last among all links in an
8605	* non-AP MLD STA. This ensures that the connection
8606	* monitor timer is only reset if at least one link
8607	* is still active, and it is scheduled to fire at
8608	* the latest possible timeout.
8609	*/
8610	if (time_after(timeout, latest_timeout))
8611	latest_timeout = timeout;
8612	}
8613
8614	return latest_timeout;
8615	}
8616
8617	static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
8618	{
8619	struct ieee80211_sub_if_data *sdata =
8620	timer_container_of(sdata, t, u.mgd.conn_mon_timer);
8621	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8622	struct ieee80211_local *local = sdata->local;
8623	unsigned long latest_timeout;
8624
8625	if (ieee80211_is_csa_in_progress(sdata))
8626	return;
8627
8628	latest_timeout = ieee80211_latest_active_link_conn_timeout(sdata);
8629
8630	/*
8631	* If latest timeout is after now, then update timer to fire at
8632	* the later date, but do not actually probe at this time.
8633	*/
8634	if (time_is_after_jiffies(latest_timeout)) {
8635	mod_timer(timer: &ifmgd->conn_mon_timer,
8636	expires: round_jiffies_up(j: latest_timeout));
8637	return;
8638	}
8639
8640	wiphy_work_queue(wiphy: local->hw.wiphy, work: &sdata->u.mgd.monitor_work);
8641	}
8642
8643	static void ieee80211_sta_monitor_work(struct wiphy *wiphy,
8644	struct wiphy_work *work)
8645	{
8646	struct ieee80211_sub_if_data *sdata =
8647	container_of(work, struct ieee80211_sub_if_data,
8648	u.mgd.monitor_work);
8649
8650	ieee80211_mgd_probe_ap(sdata, beacon: false);
8651	}
8652
8653	static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
8654	{
8655	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
8656	__ieee80211_stop_poll(sdata);
8657
8658	/ let's probe the connection once /
8659	if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
8660	wiphy_work_queue(wiphy: sdata->local->hw.wiphy,
8661	work: &sdata->u.mgd.monitor_work);
8662	}
8663	}
8664
8665	#ifdef CONFIG_PM
8666	void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
8667	{
8668	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8669	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
8670
8671	lockdep_assert_wiphy(sdata->local->hw.wiphy);
8672
8673	if (ifmgd->auth_data \|\| ifmgd->assoc_data) {
8674	const u8 *ap_addr = ifmgd->auth_data ?
8675	ifmgd->auth_data->ap_addr :
8676	ifmgd->assoc_data->ap_addr;
8677
8678	/*
8679	* If we are trying to authenticate / associate while suspending,
8680	* cfg80211 won't know and won't actually abort those attempts,
8681	* thus we need to do that ourselves.
8682	*/
8683	ieee80211_send_deauth_disassoc(sdata, da: ap_addr, bssid: ap_addr,
8684	IEEE80211_STYPE_DEAUTH,
8685	reason: WLAN_REASON_DEAUTH_LEAVING,
8686	send_frame: false, frame_buf);
8687	if (ifmgd->assoc_data)
8688	ieee80211_destroy_assoc_data(sdata, status: ASSOC_ABANDON);
8689	if (ifmgd->auth_data)
8690	ieee80211_destroy_auth_data(sdata, assoc: false);
8691	cfg80211_tx_mlme_mgmt(dev: sdata->dev, buf: frame_buf,
8692	IEEE80211_DEAUTH_FRAME_LEN,
8693	reconnect: false);
8694	}
8695
8696	/ This is a bit of a hack - we should find a better and more generic*
8697	* solution to this. Normally when suspending, cfg80211 will in fact
8698	* deauthenticate. However, it doesn't (and cannot) stop an ongoing
8699	* auth (not so important) or assoc (this is the problem) process.
8700	*
8701	* As a consequence, it can happen that we are in the process of both
8702	* associating and suspending, and receive an association response
8703	* after cfg80211 has checked if it needs to disconnect, but before
8704	* we actually set the flag to drop incoming frames. This will then
8705	* cause the workqueue flush to process the association response in
8706	* the suspend, resulting in a successful association just before it
8707	* tries to remove the interface from the driver, which now though
8708	* has a channel context assigned ... this results in issues.
8709	*
8710	* To work around this (for now) simply deauth here again if we're
8711	* now connected.
8712	*/
8713	if (ifmgd->associated && !sdata->local->wowlan) {
8714	u8 bssid[ETH_ALEN];
8715	struct cfg80211_deauth_request req = {
8716	.reason_code = WLAN_REASON_DEAUTH_LEAVING,
8717	.bssid = bssid,
8718	};
8719
8720	memcpy(to: bssid, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
8721	ieee80211_mgd_deauth(sdata, req: &req);
8722	}
8723	}
8724	#endif
8725
8726	void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
8727	{
8728	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8729
8730	lockdep_assert_wiphy(sdata->local->hw.wiphy);
8731
8732	if (!ifmgd->associated)
8733	return;
8734
8735	if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
8736	sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
8737	mlme_dbg(sdata, "driver requested disconnect after resume\n");
8738	ieee80211_sta_connection_lost(sdata,
8739	reason: WLAN_REASON_UNSPECIFIED,
8740	tx: true);
8741	return;
8742	}
8743
8744	if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) {
8745	sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART;
8746	mlme_dbg(sdata, "driver requested disconnect after hardware restart\n");
8747	ieee80211_sta_connection_lost(sdata,
8748	reason: WLAN_REASON_UNSPECIFIED,
8749	tx: true);
8750	return;
8751	}
8752	}
8753
8754	static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy,
8755	struct wiphy_work *work)
8756	{
8757	struct ieee80211_link_data *link =
8758	container_of(work, struct ieee80211_link_data,
8759	u.mgd.request_smps_work);
8760
8761	__ieee80211_request_smps_mgd(sdata: link->sdata, link,
8762	smps_mode: link->u.mgd.driver_smps_mode);
8763	}
8764
8765	static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy,
8766	struct wiphy_work *work)
8767	{
8768	struct ieee80211_sub_if_data *sdata =
8769	container_of(work, struct ieee80211_sub_if_data,
8770	u.mgd.reconf.wk.work);
8771
8772	if (!sdata->u.mgd.reconf.added_links &&
8773	!sdata->u.mgd.reconf.removed_links)
8774	return;
8775
8776	sdata_info(sdata,
8777	"mlo: reconf: timeout: added=0x%x, removed=0x%x\n",
8778	sdata->u.mgd.reconf.added_links,
8779	sdata->u.mgd.reconf.removed_links);
8780
8781	__ieee80211_disconnect(sdata);
8782	}
8783
8784	/ interface setup /
8785	void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
8786	{
8787	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8788
8789	wiphy_work_init(work: &ifmgd->monitor_work, func: ieee80211_sta_monitor_work);
8790	wiphy_work_init(work: &ifmgd->beacon_connection_loss_work,
8791	func: ieee80211_beacon_connection_loss_work);
8792	wiphy_work_init(work: &ifmgd->csa_connection_drop_work,
8793	func: ieee80211_csa_connection_drop_work);
8794	wiphy_delayed_work_init(dwork: &ifmgd->tdls_peer_del_work,
8795	func: ieee80211_tdls_peer_del_work);
8796	wiphy_delayed_work_init(dwork: &ifmgd->ml_reconf_work,
8797	func: ieee80211_ml_reconf_work);
8798	wiphy_delayed_work_init(dwork: &ifmgd->reconf.wk,
8799	func: ieee80211_ml_sta_reconf_timeout);
8800	timer_setup(&ifmgd->timer, ieee80211_sta_timer, `0`);
8801	timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, `0`);
8802	timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, `0`);
8803	wiphy_delayed_work_init(dwork: &ifmgd->tx_tspec_wk,
8804	func: ieee80211_sta_handle_tspec_ac_params_wk);
8805	wiphy_delayed_work_init(dwork: &ifmgd->ttlm_work,
8806	func: ieee80211_tid_to_link_map_work);
8807	wiphy_delayed_work_init(dwork: &ifmgd->neg_ttlm_timeout_work,
8808	func: ieee80211_neg_ttlm_timeout_work);
8809	wiphy_work_init(work: &ifmgd->teardown_ttlm_work,
8810	func: ieee80211_teardown_ttlm_work);
8811
8812	ifmgd->flags = `0`;
8813	ifmgd->powersave = sdata->wdev.ps;
8814	ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
8815	ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
8816	/ Setup TDLS data /
8817	spin_lock_init(&ifmgd->teardown_lock);
8818	ifmgd->teardown_skb = NULL;
8819	ifmgd->orig_teardown_skb = NULL;
8820	ifmgd->mcast_seq_last = IEEE80211_SN_MODULO;
8821	}
8822
8823	static void ieee80211_recalc_smps_work(struct wiphy *wiphy,
8824	struct wiphy_work *work)
8825	{
8826	struct ieee80211_link_data *link =
8827	container_of(work, struct ieee80211_link_data,
8828	u.mgd.recalc_smps);
8829
8830	ieee80211_recalc_smps(sdata: link->sdata, link);
8831	}
8832
8833	void ieee80211_mgd_setup_link(struct ieee80211_link_data *link)
8834	{
8835	struct ieee80211_sub_if_data *sdata = link->sdata;
8836	struct ieee80211_local *local = sdata->local;
8837	unsigned int link_id = link->link_id;
8838
8839	link->u.mgd.p2p_noa_index = -`1`;
8840	link->conf->bssid = link->u.mgd.bssid;
8841	link->smps_mode = IEEE80211_SMPS_OFF;
8842
8843	wiphy_work_init(work: &link->u.mgd.request_smps_work,
8844	func: ieee80211_request_smps_mgd_work);
8845	wiphy_work_init(work: &link->u.mgd.recalc_smps,
8846	func: ieee80211_recalc_smps_work);
8847	if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
8848	link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC;
8849	else
8850	link->u.mgd.req_smps = IEEE80211_SMPS_OFF;
8851
8852	wiphy_delayed_work_init(dwork: &link->u.mgd.csa.switch_work,
8853	func: ieee80211_csa_switch_work);
8854
8855	ieee80211_clear_tpe(tpe: &link->conf->tpe);
8856
8857	if (sdata->u.mgd.assoc_data)
8858	ether_addr_copy(dst: link->conf->addr,
8859	src: sdata->u.mgd.assoc_data->link[link_id].addr);
8860	else if (sdata->u.mgd.reconf.add_links_data)
8861	ether_addr_copy(dst: link->conf->addr,
8862	src: sdata->u.mgd.reconf.add_links_data->link[link_id].addr);
8863	else if (!is_valid_ether_addr(addr: link->conf->addr))
8864	eth_random_addr(addr: link->conf->addr);
8865	}
8866
8867	/ scan finished notification /
8868	void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
8869	{
8870	struct ieee80211_sub_if_data *sdata;
8871
8872	/ Restart STA timers /
8873	rcu_read_lock();
8874	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
8875	if (ieee80211_sdata_running(sdata))
8876	ieee80211_restart_sta_timer(sdata);
8877	}
8878	rcu_read_unlock();
8879	}
8880
8881	static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
8882	struct cfg80211_bss *cbss, s8 link_id,
8883	const u8 *ap_mld_addr, bool assoc,
8884	struct ieee80211_conn_settings *conn,
8885	bool override,
8886	unsigned long *userspace_selectors)
8887	{
8888	struct ieee80211_local *local = sdata->local;
8889	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8890	struct ieee80211_bss bss = (void* *)cbss->priv;
8891	struct sta_info *new_sta = NULL;
8892	struct ieee80211_link_data *link;
8893	bool have_sta = false;
8894	bool mlo;
8895	int err;
8896	u16 new_links;
8897
8898	if (link_id >= `0`) {
8899	mlo = true;
8900	if (WARN_ON(!ap_mld_addr))
8901	return -EINVAL;
8902	new_links = BIT(link_id);
8903	} else {
8904	if (WARN_ON(ap_mld_addr))
8905	return -EINVAL;
8906	ap_mld_addr = cbss->bssid;
8907	new_links = `0`;
8908	link_id = `0`;
8909	mlo = false;
8910	}
8911
8912	if (assoc) {
8913	rcu_read_lock();
8914	have_sta = sta_info_get(sdata, addr: ap_mld_addr);
8915	rcu_read_unlock();
8916	}
8917
8918	if (mlo && !have_sta &&
8919	WARN_ON(sdata->vif.valid_links \|\| sdata->vif.active_links))
8920	return -EINVAL;
8921
8922	err = ieee80211_vif_set_links(sdata, new_links, dormant_links: `0`);
8923	if (err)
8924	return err;
8925
8926	link = sdata_dereference(sdata->link[link_id], sdata);
8927	if (WARN_ON(!link)) {
8928	err = -ENOLINK;
8929	goto out_err;
8930	}
8931
8932	if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) {
8933	err = -EINVAL;
8934	goto out_err;
8935	}
8936
8937	/ If a reconfig is happening, bail out /
8938	if (local->in_reconfig) {
8939	err = -EBUSY;
8940	goto out_err;
8941	}
8942
8943	if (!have_sta) {
8944	if (mlo)
8945	new_sta = sta_info_alloc_with_link(sdata, mld_addr: ap_mld_addr,
8946	link_id, link_addr: cbss->bssid,
8947	GFP_KERNEL);
8948	else
8949	new_sta = sta_info_alloc(sdata, addr: ap_mld_addr, GFP_KERNEL);
8950
8951	if (!new_sta) {
8952	err = -ENOMEM;
8953	goto out_err;
8954	}
8955
8956	new_sta->sta.mlo = mlo;
8957	}
8958
8959	/*
8960	* Set up the information for the new channel before setting the
8961	* new channel. We can't - completely race-free - change the basic
8962	* rates bitmap and the channel (sband) that it refers to, but if
8963	* we set it up before we at least avoid calling into the driver's
8964	* bss_info_changed() method with invalid information (since we do
8965	* call that from changing the channel - only for IDLE and perhaps
8966	* some others, but ...).
8967	*
8968	* So to avoid that, just set up all the new information before the
8969	* channel, but tell the driver to apply it only afterwards, since
8970	* it might need the new channel for that.
8971	*/
8972	if (new_sta) {
8973	const struct cfg80211_bss_ies *ies;
8974	struct link_sta_info *link_sta;
8975
8976	rcu_read_lock();
8977	link_sta = rcu_dereference(new_sta->link[link_id]);
8978	if (WARN_ON(!link_sta)) {
8979	rcu_read_unlock();
8980	sta_info_free(local, sta: new_sta);
8981	err = -EINVAL;
8982	goto out_err;
8983	}
8984
8985	err = ieee80211_mgd_setup_link_sta(link, sta: new_sta,
8986	link_sta, cbss);
8987	if (err) {
8988	rcu_read_unlock();
8989	sta_info_free(local, sta: new_sta);
8990	goto out_err;
8991	}
8992
8993	memcpy(to: link->u.mgd.bssid, from: cbss->bssid, ETH_ALEN);
8994
8995	/ set timing information /
8996	link->conf->beacon_int = cbss->beacon_interval;
8997	ies = rcu_dereference(cbss->beacon_ies);
8998	if (ies) {
8999	link->conf->sync_tsf = ies->tsf;
9000	link->conf->sync_device_ts =
9001	bss->device_ts_beacon;
9002
9003	ieee80211_get_dtim(ies,
9004	dtim_count: &link->conf->sync_dtim_count,
9005	NULL);
9006	} else if (!ieee80211_hw_check(&sdata->local->hw,
9007	TIMING_BEACON_ONLY)) {
9008	ies = rcu_dereference(cbss->proberesp_ies);
9009	/ must be non-NULL since beacon IEs were NULL /
9010	link->conf->sync_tsf = ies->tsf;
9011	link->conf->sync_device_ts =
9012	bss->device_ts_presp;
9013	link->conf->sync_dtim_count = `0`;
9014	} else {
9015	link->conf->sync_tsf = `0`;
9016	link->conf->sync_device_ts = `0`;
9017	link->conf->sync_dtim_count = `0`;
9018	}
9019	rcu_read_unlock();
9020	}
9021
9022	if (new_sta \|\| override) {
9023	/*
9024	* Only set this if we're also going to calculate the AP
9025	* settings etc., otherwise this was set before in a
9026	* previous call. Note override is set to %true in assoc
9027	* if the settings were changed.
9028	*/
9029	link->u.mgd.conn = *conn;
9030	err = ieee80211_prep_channel(sdata, link, link_id: link->link_id, cbss,
9031	mlo, conn: &link->u.mgd.conn,
9032	userspace_selectors);
9033	if (err) {
9034	if (new_sta)
9035	sta_info_free(local, sta: new_sta);
9036	goto out_err;
9037	}
9038	/ pass out for use in assoc /
9039	*conn = link->u.mgd.conn;
9040	}
9041
9042	if (new_sta) {
9043	/*
9044	* tell driver about BSSID, basic rates and timing
9045	* this was set up above, before setting the channel
9046	*/
9047	ieee80211_link_info_change_notify(sdata, link,
9048	changed: BSS_CHANGED_BSSID \|
9049	BSS_CHANGED_BASIC_RATES \|
9050	BSS_CHANGED_BEACON_INT);
9051
9052	if (assoc)
9053	sta_info_pre_move_state(sta: new_sta, new_state: IEEE80211_STA_AUTH);
9054
9055	err = sta_info_insert(sta: new_sta);
9056	new_sta = NULL;
9057	if (err) {
9058	sdata_info(sdata,
9059	"failed to insert STA entry for the AP (error %d)\n",
9060	err);
9061	goto out_release_chan;
9062	}
9063	} else
9064	WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid));
9065
9066	/ Cancel scan to ensure that nothing interferes with connection /
9067	if (local->scanning)
9068	ieee80211_scan_cancel(local);
9069
9070	return `0`;
9071
9072	out_release_chan:
9073	ieee80211_link_release_channel(link);
9074	out_err:
9075	ieee80211_vif_set_links(sdata, new_links: `0`, dormant_links: `0`);
9076	return err;
9077	}
9078
9079	static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata,
9080	const struct cfg80211_bss_ies *ies,
9081	u8 cur_channel, bool ignore_ecsa)
9082	{
9083	const struct element csa_elem, ecsa_elem;
9084	struct ieee80211_channel_sw_ie *csa = NULL;
9085	struct ieee80211_ext_chansw_ie *ecsa = NULL;
9086
9087	if (!ies)
9088	return false;
9089
9090	csa_elem = cfg80211_find_elem(eid: WLAN_EID_CHANNEL_SWITCH,
9091	ies: ies->data, len: ies->len);
9092	if (csa_elem && csa_elem->datalen == sizeof(*csa))
9093	csa = (void *)csa_elem->data;
9094
9095	ecsa_elem = cfg80211_find_elem(eid: WLAN_EID_EXT_CHANSWITCH_ANN,
9096	ies: ies->data, len: ies->len);
9097	if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa))
9098	ecsa = (void *)ecsa_elem->data;
9099
9100	if (csa && csa->count == `0`)
9101	csa = NULL;
9102	if (csa && !csa->mode && csa->new_ch_num == cur_channel)
9103	csa = NULL;
9104
9105	if (ecsa && ecsa->count == `0`)
9106	ecsa = NULL;
9107	if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel)
9108	ecsa = NULL;
9109
9110	if (ignore_ecsa && ecsa) {
9111	sdata_info(sdata,
9112	"Ignoring ECSA in probe response - was considered stuck!\n");
9113	return csa;
9114	}
9115
9116	return csa \|\| ecsa;
9117	}
9118
9119	static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata,
9120	struct cfg80211_bss *bss)
9121	{
9122	u8 cur_channel;
9123	bool ret;
9124
9125	cur_channel = ieee80211_frequency_to_channel(freq: bss->channel->center_freq);
9126
9127	rcu_read_lock();
9128	if (ieee80211_mgd_csa_present(sdata,
9129	rcu_dereference(bss->beacon_ies),
9130	cur_channel, ignore_ecsa: false)) {
9131	ret = true;
9132	goto out;
9133	}
9134
9135	if (ieee80211_mgd_csa_present(sdata,
9136	rcu_dereference(bss->proberesp_ies),
9137	cur_channel, ignore_ecsa: bss->proberesp_ecsa_stuck)) {
9138	ret = true;
9139	goto out;
9140	}
9141
9142	ret = false;
9143	out:
9144	rcu_read_unlock();
9145	return ret;
9146	}
9147
9148	static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors,
9149	const u8 *supported_selectors,
9150	u8 supported_selectors_len)
9151	{
9152	if (supported_selectors) {
9153	for (int i = `0`; i < supported_selectors_len; i++) {
9154	set_bit(nr: supported_selectors[i],
9155	addr: userspace_selectors);
9156	}
9157	} else {
9158	/ Assume SAE_H2E support for backward compatibility. /
9159	set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E,
9160	addr: userspace_selectors);
9161	}
9162	}
9163
9164	/ config hooks /
9165	int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
9166	struct cfg80211_auth_request *req)
9167	{
9168	struct ieee80211_local *local = sdata->local;
9169	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9170	struct ieee80211_mgd_auth_data *auth_data;
9171	struct ieee80211_conn_settings conn;
9172	struct ieee80211_link_data *link;
9173	struct ieee80211_supported_band *sband;
9174	struct ieee80211_bss *bss;
9175	u16 auth_alg;
9176	int err;
9177	bool cont_auth, wmm_used;
9178
9179	lockdep_assert_wiphy(sdata->local->hw.wiphy);
9180
9181	/ prepare auth data structure /
9182
9183	switch (req->auth_type) {
9184	case NL80211_AUTHTYPE_OPEN_SYSTEM:
9185	auth_alg = WLAN_AUTH_OPEN;
9186	break;
9187	case NL80211_AUTHTYPE_SHARED_KEY:
9188	if (fips_enabled)
9189	return -EOPNOTSUPP;
9190	auth_alg = WLAN_AUTH_SHARED_KEY;
9191	break;
9192	case NL80211_AUTHTYPE_FT:
9193	auth_alg = WLAN_AUTH_FT;
9194	break;
9195	case NL80211_AUTHTYPE_NETWORK_EAP:
9196	auth_alg = WLAN_AUTH_LEAP;
9197	break;
9198	case NL80211_AUTHTYPE_SAE:
9199	auth_alg = WLAN_AUTH_SAE;
9200	break;
9201	case NL80211_AUTHTYPE_FILS_SK:
9202	auth_alg = WLAN_AUTH_FILS_SK;
9203	break;
9204	case NL80211_AUTHTYPE_FILS_SK_PFS:
9205	auth_alg = WLAN_AUTH_FILS_SK_PFS;
9206	break;
9207	case NL80211_AUTHTYPE_FILS_PK:
9208	auth_alg = WLAN_AUTH_FILS_PK;
9209	break;
9210	default:
9211	return -EOPNOTSUPP;
9212	}
9213
9214	if (ifmgd->assoc_data)
9215	return -EBUSY;
9216
9217	if (ieee80211_mgd_csa_in_process(sdata, bss: req->bss)) {
9218	sdata_info(sdata, "AP is in CSA process, reject auth\n");
9219	return -EINVAL;
9220	}
9221
9222	auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
9223	req->ie_len, GFP_KERNEL);
9224	if (!auth_data)
9225	return -ENOMEM;
9226
9227	memcpy(to: auth_data->ap_addr,
9228	from: req->ap_mld_addr ?: req->bss->bssid,
9229	ETH_ALEN);
9230	auth_data->bss = req->bss;
9231	auth_data->link_id = req->link_id;
9232
9233	if (req->auth_data_len >= `4`) {
9234	if (req->auth_type == NL80211_AUTHTYPE_SAE) {
9235	__le16 pos = (__le16 ) req->auth_data;
9236
9237	auth_data->sae_trans = le16_to_cpu(pos[`0`]);
9238	auth_data->sae_status = le16_to_cpu(pos[`1`]);
9239	}
9240	memcpy(to: auth_data->data, from: req->auth_data + `4`,
9241	len: req->auth_data_len - `4`);
9242	auth_data->data_len += req->auth_data_len - `4`;
9243	}
9244
9245	/ Check if continuing authentication or trying to authenticate with the*
9246	* same BSS that we were in the process of authenticating with and avoid
9247	* removal and re-addition of the STA entry in
9248	* ieee80211_prep_connection().
9249	*/
9250	cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss &&
9251	ifmgd->auth_data->link_id == req->link_id;
9252
9253	if (req->ie && req->ie_len) {
9254	memcpy(to: &auth_data->data[auth_data->data_len],
9255	from: req->ie, len: req->ie_len);
9256	auth_data->data_len += req->ie_len;
9257	}
9258
9259	if (req->key && req->key_len) {
9260	auth_data->key_len = req->key_len;
9261	auth_data->key_idx = req->key_idx;
9262	memcpy(to: auth_data->key, from: req->key, len: req->key_len);
9263	}
9264
9265	ieee80211_parse_cfg_selectors(userspace_selectors: auth_data->userspace_selectors,
9266	supported_selectors: req->supported_selectors,
9267	supported_selectors_len: req->supported_selectors_len);
9268
9269	auth_data->algorithm = auth_alg;
9270
9271	/ try to authenticate/probe /
9272
9273	if (ifmgd->auth_data) {
9274	if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
9275	auth_data->peer_confirmed =
9276	ifmgd->auth_data->peer_confirmed;
9277	}
9278	ieee80211_destroy_auth_data(sdata, assoc: cont_auth);
9279	}
9280
9281	/ prep auth_data so we don't go into idle on disassoc /
9282	ifmgd->auth_data = auth_data;
9283
9284	/ If this is continuation of an ongoing SAE authentication exchange*
9285	* (i.e., request to send SAE Confirm) and the peer has already
9286	* confirmed, mark authentication completed since we are about to send
9287	* out SAE Confirm.
9288	*/
9289	if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
9290	auth_data->peer_confirmed && auth_data->sae_trans == `2`)
9291	ieee80211_mark_sta_auth(sdata);
9292
9293	if (ifmgd->associated) {
9294	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9295
9296	sdata_info(sdata,
9297	"disconnect from AP %pM for new auth to %pM\n",
9298	sdata->vif.cfg.ap_addr, auth_data->ap_addr);
9299	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
9300	reason: WLAN_REASON_UNSPECIFIED,
9301	tx: false, frame_buf);
9302
9303	ieee80211_report_disconnect(sdata, buf: frame_buf,
9304	len: sizeof(frame_buf), tx: true,
9305	reason: WLAN_REASON_UNSPECIFIED,
9306	reconnect: false);
9307	}
9308
9309	/ needed for transmitting the auth frame(s) properly /
9310	memcpy(to: sdata->vif.cfg.ap_addr, from: auth_data->ap_addr, ETH_ALEN);
9311
9312	bss = (void *)req->bss->priv;
9313	wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS);
9314
9315	sband = local->hw.wiphy->bands[req->bss->channel->band];
9316
9317	ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used,
9318	conn: &conn);
9319
9320	err = ieee80211_prep_connection(sdata, cbss: req->bss, link_id: req->link_id,
9321	ap_mld_addr: req->ap_mld_addr, assoc: cont_auth,
9322	conn: &conn, override: false,
9323	userspace_selectors: auth_data->userspace_selectors);
9324	if (err)
9325	goto err_clear;
9326
9327	if (req->link_id >= `0`)
9328	link = sdata_dereference(sdata->link[req->link_id], sdata);
9329	else
9330	link = &sdata->deflink;
9331
9332	if (WARN_ON(!link)) {
9333	err = -ENOLINK;
9334	goto err_clear;
9335	}
9336
9337	sdata_info(sdata, "authenticate with %pM (local address=%pM)\n",
9338	auth_data->ap_addr, link->conf->addr);
9339
9340	err = ieee80211_auth(sdata);
9341	if (err) {
9342	sta_info_destroy_addr(sdata, addr: auth_data->ap_addr);
9343	goto err_clear;
9344	}
9345
9346	/ hold our own reference /
9347	cfg80211_ref_bss(wiphy: local->hw.wiphy, bss: auth_data->bss);
9348	return `0`;
9349
9350	err_clear:
9351	if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
9352	eth_zero_addr(addr: sdata->deflink.u.mgd.bssid);
9353	ieee80211_link_info_change_notify(sdata, link: &sdata->deflink,
9354	changed: BSS_CHANGED_BSSID);
9355	ieee80211_link_release_channel(link: &sdata->deflink);
9356	}
9357	ifmgd->auth_data = NULL;
9358	kfree(objp: auth_data);
9359	return err;
9360	}
9361
9362	static void
9363	ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata,
9364	struct ieee80211_mgd_assoc_data *assoc_data,
9365	struct cfg80211_assoc_request *req,
9366	struct ieee80211_conn_settings *conn,
9367	unsigned int link_id)
9368	{
9369	struct ieee80211_local *local = sdata->local;
9370	const struct cfg80211_bss_ies *bss_ies;
9371	struct ieee80211_supported_band *sband;
9372	struct ieee80211_link_data *link;
9373	struct cfg80211_bss *cbss;
9374	struct ieee80211_bss *bss;
9375
9376	cbss = assoc_data->link[link_id].bss;
9377	if (WARN_ON(!cbss))
9378	return;
9379
9380	bss = (void *)cbss->priv;
9381
9382	sband = local->hw.wiphy->bands[cbss->channel->band];
9383	if (WARN_ON(!sband))
9384	return;
9385
9386	link = sdata_dereference(sdata->link[link_id], sdata);
9387	if (WARN_ON(!link))
9388	return;
9389
9390	/ for MLO connections assume advertising all rates is OK /
9391	if (!req->ap_mld_addr) {
9392	assoc_data->supp_rates = bss->supp_rates;
9393	assoc_data->supp_rates_len = bss->supp_rates_len;
9394	}
9395
9396	/ copy and link elems for the STA profile /
9397	if (req->links[link_id].elems_len) {
9398	memcpy(to: assoc_data->ie_pos, from: req->links[link_id].elems,
9399	len: req->links[link_id].elems_len);
9400	assoc_data->link[link_id].elems = assoc_data->ie_pos;
9401	assoc_data->link[link_id].elems_len = req->links[link_id].elems_len;
9402	assoc_data->ie_pos += req->links[link_id].elems_len;
9403	}
9404
9405	link->u.mgd.beacon_crc_valid = false;
9406	link->u.mgd.dtim_period = `0`;
9407	link->u.mgd.have_beacon = false;
9408
9409	/ override HT configuration only if the AP and we support it /
9410	if (conn->mode >= IEEE80211_CONN_MODE_HT) {
9411	struct ieee80211_sta_ht_cap sta_ht_cap;
9412
9413	memcpy(to: &sta_ht_cap, from: &sband->ht_cap, len: sizeof(sta_ht_cap));
9414	ieee80211_apply_htcap_overrides(sdata, ht_cap: &sta_ht_cap);
9415	}
9416
9417	rcu_read_lock();
9418	bss_ies = rcu_dereference(cbss->beacon_ies);
9419	if (bss_ies) {
9420	u8 dtim_count = `0`;
9421
9422	ieee80211_get_dtim(ies: bss_ies, dtim_count: &dtim_count,
9423	dtim_period: &link->u.mgd.dtim_period);
9424
9425	sdata->deflink.u.mgd.have_beacon = true;
9426
9427	if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
9428	link->conf->sync_tsf = bss_ies->tsf;
9429	link->conf->sync_device_ts = bss->device_ts_beacon;
9430	link->conf->sync_dtim_count = dtim_count;
9431	}
9432	} else {
9433	bss_ies = rcu_dereference(cbss->ies);
9434	}
9435
9436	if (bss_ies) {
9437	const struct element *elem;
9438
9439	elem = cfg80211_find_ext_elem(ext_eid: WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
9440	ies: bss_ies->data, len: bss_ies->len);
9441	if (elem && elem->datalen >= `3`)
9442	link->conf->profile_periodicity = elem->data[`2`];
9443	else
9444	link->conf->profile_periodicity = `0`;
9445
9446	elem = cfg80211_find_elem(eid: WLAN_EID_EXT_CAPABILITY,
9447	ies: bss_ies->data, len: bss_ies->len);
9448	if (elem && elem->datalen >= `11` &&
9449	(elem->data[`10`] & WLAN_EXT_CAPA11_EMA_SUPPORT))
9450	link->conf->ema_ap = true;
9451	else
9452	link->conf->ema_ap = false;
9453	}
9454	rcu_read_unlock();
9455
9456	if (bss->corrupt_data) {
9457	char *corrupt_type = "data";
9458
9459	if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
9460	if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
9461	corrupt_type = "beacon and probe response";
9462	else
9463	corrupt_type = "beacon";
9464	} else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) {
9465	corrupt_type = "probe response";
9466	}
9467	sdata_info(sdata, "associating to AP %pM with corrupt %s\n",
9468	cbss->bssid, corrupt_type);
9469	}
9470
9471	if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) {
9472	if (sdata->u.mgd.powersave)
9473	link->smps_mode = IEEE80211_SMPS_DYNAMIC;
9474	else
9475	link->smps_mode = IEEE80211_SMPS_OFF;
9476	} else {
9477	link->smps_mode = link->u.mgd.req_smps;
9478	}
9479	}
9480
9481	static int
9482	ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata,
9483	struct ieee80211_mgd_assoc_data *assoc_data,
9484	int link_id)
9485	{
9486	struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
9487	enum nl80211_band band = cbss->channel->band;
9488	struct ieee80211_supported_band *sband;
9489	const struct element *elem;
9490	int err;
9491
9492	/ neither HT nor VHT elements used on 6 GHz /
9493	if (band == NL80211_BAND_6GHZ)
9494	return `0`;
9495
9496	if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT)
9497	return `0`;
9498
9499	rcu_read_lock();
9500	elem = ieee80211_bss_get_elem(bss: cbss, id: WLAN_EID_HT_OPERATION);
9501	if (!elem \|\| elem->datalen < sizeof(struct ieee80211_ht_operation)) {
9502	mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n",
9503	cbss->bssid);
9504	err = -EINVAL;
9505	goto out_rcu;
9506	}
9507	assoc_data->link[link_id].ap_ht_param =
9508	((struct ieee80211_ht_operation *)(elem->data))->ht_param;
9509	rcu_read_unlock();
9510
9511	if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT)
9512	return `0`;
9513
9514	/ some drivers want to support VHT on 2.4 GHz even /
9515	sband = sdata->local->hw.wiphy->bands[band];
9516	if (!sband->vht_cap.vht_supported)
9517	return `0`;
9518
9519	rcu_read_lock();
9520	elem = ieee80211_bss_get_elem(bss: cbss, id: WLAN_EID_VHT_CAPABILITY);
9521	/ but even then accept it not being present on the AP /
9522	if (!elem && band == NL80211_BAND_2GHZ) {
9523	err = `0`;
9524	goto out_rcu;
9525	}
9526	if (!elem \|\| elem->datalen < sizeof(struct ieee80211_vht_cap)) {
9527	mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n",
9528	cbss->bssid);
9529	err = -EINVAL;
9530	goto out_rcu;
9531	}
9532	memcpy(to: &assoc_data->link[link_id].ap_vht_cap, from: elem->data,
9533	len: sizeof(struct ieee80211_vht_cap));
9534	rcu_read_unlock();
9535
9536	return `0`;
9537	out_rcu:
9538	rcu_read_unlock();
9539	return err;
9540	}
9541
9542	static bool
9543	ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req)
9544	{
9545	const struct cfg80211_bss_ies *ies;
9546	struct cfg80211_bss *bss;
9547	const struct element *ml;
9548
9549	/ not an MLO connection if link_id < 0, so irrelevant /
9550	if (req->link_id < `0`)
9551	return false;
9552
9553	bss = req->links[req->link_id].bss;
9554
9555	guard(rcu)();
9556	ies = rcu_dereference(bss->ies);
9557	for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK,
9558	ies->data, ies->len) {
9559	const struct ieee80211_multi_link_elem *mle;
9560
9561	if (!ieee80211_mle_type_ok(data: ml->data + `1`,
9562	IEEE80211_ML_CONTROL_TYPE_BASIC,
9563	len: ml->datalen - `1`))
9564	continue;
9565
9566	mle = (void *)(ml->data + `1`);
9567	if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP))
9568	return true;
9569	}
9570
9571	return false;
9572
9573	}
9574
9575	int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
9576	struct cfg80211_assoc_request *req)
9577	{
9578	unsigned int assoc_link_id = req->link_id < `0` ? `0` : req->link_id;
9579	struct ieee80211_local *local = sdata->local;
9580	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9581	struct ieee80211_mgd_assoc_data *assoc_data;
9582	const struct element *ssid_elem;
9583	struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
9584	struct ieee80211_link_data *link;
9585	struct cfg80211_bss *cbss;
9586	bool override, uapsd_supported;
9587	bool match_auth;
9588	int i, err;
9589	size_t size = sizeof(*assoc_data) + req->ie_len;
9590
9591	for (i = `0`; i < IEEE80211_MLD_MAX_NUM_LINKS; i++)
9592	size += req->links[i].elems_len;
9593
9594	/ FIXME: no support for 4-addr MLO yet /
9595	if (sdata->u.mgd.use_4addr && req->link_id >= `0`)
9596	return -EOPNOTSUPP;
9597
9598	assoc_data = kzalloc(size, GFP_KERNEL);
9599	if (!assoc_data)
9600	return -ENOMEM;
9601
9602	cbss = req->link_id < `0` ? req->bss : req->links[req->link_id].bss;
9603
9604	if (ieee80211_mgd_csa_in_process(sdata, bss: cbss)) {
9605	sdata_info(sdata, "AP is in CSA process, reject assoc\n");
9606	err = -EINVAL;
9607	goto err_free;
9608	}
9609
9610	rcu_read_lock();
9611	ssid_elem = ieee80211_bss_get_elem(bss: cbss, id: WLAN_EID_SSID);
9612	if (!ssid_elem \|\| ssid_elem->datalen > sizeof(assoc_data->ssid)) {
9613	rcu_read_unlock();
9614	err = -EINVAL;
9615	goto err_free;
9616	}
9617
9618	memcpy(to: assoc_data->ssid, from: ssid_elem->data, len: ssid_elem->datalen);
9619	assoc_data->ssid_len = ssid_elem->datalen;
9620	rcu_read_unlock();
9621
9622	if (req->ap_mld_addr)
9623	memcpy(to: assoc_data->ap_addr, from: req->ap_mld_addr, ETH_ALEN);
9624	else
9625	memcpy(to: assoc_data->ap_addr, from: cbss->bssid, ETH_ALEN);
9626
9627	/*
9628	* Many APs have broken parsing of the extended MLD capa/ops field,
9629	* dropping (re-)association request frames or replying with association
9630	* response with a failure status if it's present.
9631	* Set our value from the userspace request only in strict mode or if
9632	* the AP also had that field present.
9633	*/
9634	if (ieee80211_hw_check(&local->hw, STRICT) \|\|
9635	ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req))
9636	assoc_data->ext_mld_capa_ops =
9637	cpu_to_le16(req->ext_mld_capa_ops);
9638
9639	if (ifmgd->associated) {
9640	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9641
9642	sdata_info(sdata,
9643	"disconnect from AP %pM for new assoc to %pM\n",
9644	sdata->vif.cfg.ap_addr, assoc_data->ap_addr);
9645	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
9646	reason: WLAN_REASON_UNSPECIFIED,
9647	tx: false, frame_buf);
9648
9649	ieee80211_report_disconnect(sdata, buf: frame_buf,
9650	len: sizeof(frame_buf), tx: true,
9651	reason: WLAN_REASON_UNSPECIFIED,
9652	reconnect: false);
9653	}
9654
9655	memset(s: sdata->u.mgd.userspace_selectors, c: `0`,
9656	n: sizeof(sdata->u.mgd.userspace_selectors));
9657	ieee80211_parse_cfg_selectors(userspace_selectors: sdata->u.mgd.userspace_selectors,
9658	supported_selectors: req->supported_selectors,
9659	supported_selectors_len: req->supported_selectors_len);
9660
9661	memcpy(to: &ifmgd->ht_capa, from: &req->ht_capa, len: sizeof(ifmgd->ht_capa));
9662	memcpy(to: &ifmgd->ht_capa_mask, from: &req->ht_capa_mask,
9663	len: sizeof(ifmgd->ht_capa_mask));
9664
9665	memcpy(to: &ifmgd->vht_capa, from: &req->vht_capa, len: sizeof(ifmgd->vht_capa));
9666	memcpy(to: &ifmgd->vht_capa_mask, from: &req->vht_capa_mask,
9667	len: sizeof(ifmgd->vht_capa_mask));
9668
9669	memcpy(to: &ifmgd->s1g_capa, from: &req->s1g_capa, len: sizeof(ifmgd->s1g_capa));
9670	memcpy(to: &ifmgd->s1g_capa_mask, from: &req->s1g_capa_mask,
9671	len: sizeof(ifmgd->s1g_capa_mask));
9672
9673	/ keep some setup (AP STA, channel, ...) if matching /
9674	match_auth = ifmgd->auth_data &&
9675	ether_addr_equal(addr1: ifmgd->auth_data->ap_addr,
9676	addr2: assoc_data->ap_addr) &&
9677	ifmgd->auth_data->link_id == req->link_id;
9678
9679	if (req->ap_mld_addr) {
9680	uapsd_supported = true;
9681
9682	if (req->flags & (ASSOC_REQ_DISABLE_HT \|
9683	ASSOC_REQ_DISABLE_VHT \|
9684	ASSOC_REQ_DISABLE_HE \|
9685	ASSOC_REQ_DISABLE_EHT)) {
9686	err = -EINVAL;
9687	goto err_free;
9688	}
9689
9690	for (i = `0`; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
9691	struct ieee80211_supported_band *sband;
9692	struct cfg80211_bss *link_cbss = req->links[i].bss;
9693	struct ieee80211_bss *bss;
9694
9695	if (!link_cbss)
9696	continue;
9697
9698	bss = (void *)link_cbss->priv;
9699
9700	if (!bss->wmm_used) {
9701	err = -EINVAL;
9702	req->links[i].error = err;
9703	goto err_free;
9704	}
9705
9706	if (link_cbss->channel->band == NL80211_BAND_S1GHZ) {
9707	err = -EINVAL;
9708	req->links[i].error = err;
9709	goto err_free;
9710	}
9711
9712	link = sdata_dereference(sdata->link[i], sdata);
9713	if (link)
9714	ether_addr_copy(dst: assoc_data->link[i].addr,
9715	src: link->conf->addr);
9716	else
9717	eth_random_addr(addr: assoc_data->link[i].addr);
9718	sband = local->hw.wiphy->bands[link_cbss->channel->band];
9719
9720	if (match_auth && i == assoc_link_id && link)
9721	assoc_data->link[i].conn = link->u.mgd.conn;
9722	else
9723	assoc_data->link[i].conn =
9724	ieee80211_conn_settings_unlimited;
9725	ieee80211_determine_our_sta_mode_assoc(sdata, sband,
9726	req, wmm_used: true, link_id: i,
9727	conn: &assoc_data->link[i].conn);
9728	assoc_data->link[i].bss = link_cbss;
9729	assoc_data->link[i].disabled = req->links[i].disabled;
9730
9731	if (!bss->uapsd_supported)
9732	uapsd_supported = false;
9733
9734	if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) {
9735	err = -EINVAL;
9736	req->links[i].error = err;
9737	goto err_free;
9738	}
9739
9740	err = ieee80211_mgd_get_ap_ht_vht_capa(sdata,
9741	assoc_data, link_id: i);
9742	if (err) {
9743	err = -EINVAL;
9744	req->links[i].error = err;
9745	goto err_free;
9746	}
9747	}
9748
9749	assoc_data->wmm = true;
9750	} else {
9751	struct ieee80211_supported_band *sband;
9752	struct ieee80211_bss bss = (void* *)cbss->priv;
9753
9754	memcpy(to: assoc_data->link[`0`].addr, from: sdata->vif.addr, ETH_ALEN);
9755	assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
9756
9757	assoc_data->wmm = bss->wmm_used &&
9758	(local->hw.queues >= IEEE80211_NUM_ACS);
9759
9760	if (cbss->channel->band == NL80211_BAND_6GHZ &&
9761	req->flags & (ASSOC_REQ_DISABLE_HT \|
9762	ASSOC_REQ_DISABLE_VHT \|
9763	ASSOC_REQ_DISABLE_HE)) {
9764	err = -EINVAL;
9765	goto err_free;
9766	}
9767
9768	sband = local->hw.wiphy->bands[cbss->channel->band];
9769
9770	assoc_data->link[`0`].bss = cbss;
9771
9772	if (match_auth)
9773	assoc_data->link[`0`].conn = sdata->deflink.u.mgd.conn;
9774	else
9775	assoc_data->link[`0`].conn =
9776	ieee80211_conn_settings_unlimited;
9777	ieee80211_determine_our_sta_mode_assoc(sdata, sband, req,
9778	wmm_used: assoc_data->wmm, link_id: `0`,
9779	conn: &assoc_data->link[`0`].conn);
9780
9781	uapsd_supported = bss->uapsd_supported;
9782
9783	err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, link_id: `0`);
9784	if (err)
9785	goto err_free;
9786	}
9787
9788	assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU;
9789
9790	if (ifmgd->auth_data && !ifmgd->auth_data->done) {
9791	err = -EBUSY;
9792	goto err_free;
9793	}
9794
9795	if (ifmgd->assoc_data) {
9796	err = -EBUSY;
9797	goto err_free;
9798	}
9799
9800	/ Cleanup is delayed if auth_data matches /
9801	if (ifmgd->auth_data && !match_auth)
9802	ieee80211_destroy_auth_data(sdata, assoc: false);
9803
9804	if (req->ie && req->ie_len) {
9805	memcpy(to: assoc_data->ie, from: req->ie, len: req->ie_len);
9806	assoc_data->ie_len = req->ie_len;
9807	assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len;
9808	} else {
9809	assoc_data->ie_pos = assoc_data->ie;
9810	}
9811
9812	if (req->fils_kek) {
9813	/ should already be checked in cfg80211 - so warn /
9814	if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
9815	err = -EINVAL;
9816	goto err_free;
9817	}
9818	memcpy(to: assoc_data->fils_kek, from: req->fils_kek,
9819	len: req->fils_kek_len);
9820	assoc_data->fils_kek_len = req->fils_kek_len;
9821	}
9822
9823	if (req->fils_nonces)
9824	memcpy(to: assoc_data->fils_nonces, from: req->fils_nonces,
9825	len: `2` * FILS_NONCE_LEN);
9826
9827	/ default timeout /
9828	assoc_data->timeout = jiffies;
9829	assoc_data->timeout_started = true;
9830
9831	assoc_data->assoc_link_id = assoc_link_id;
9832
9833	if (req->ap_mld_addr) {
9834	/ if there was no authentication, set up the link /
9835	err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), dormant_links: `0`);
9836	if (err)
9837	goto err_clear;
9838	}
9839
9840	link = sdata_dereference(sdata->link[assoc_link_id], sdata);
9841	if (WARN_ON(!link)) {
9842	err = -EINVAL;
9843	goto err_clear;
9844	}
9845
9846	override = link->u.mgd.conn.mode !=
9847	assoc_data->link[assoc_link_id].conn.mode \|\|
9848	link->u.mgd.conn.bw_limit !=
9849	assoc_data->link[assoc_link_id].conn.bw_limit;
9850	link->u.mgd.conn = assoc_data->link[assoc_link_id].conn;
9851
9852	ieee80211_setup_assoc_link(sdata, assoc_data, req, conn: &link->u.mgd.conn,
9853	link_id: assoc_link_id);
9854
9855	if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
9856	ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
9857	"U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
9858	sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
9859
9860	if (assoc_data->wmm && uapsd_supported &&
9861	(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
9862	assoc_data->uapsd = true;
9863	ifmgd->flags \|= IEEE80211_STA_UAPSD_ENABLED;
9864	} else {
9865	assoc_data->uapsd = false;
9866	ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
9867	}
9868
9869	if (req->prev_bssid)
9870	memcpy(to: assoc_data->prev_ap_addr, from: req->prev_bssid, ETH_ALEN);
9871
9872	if (req->use_mfp) {
9873	ifmgd->mfp = IEEE80211_MFP_REQUIRED;
9874	ifmgd->flags \|= IEEE80211_STA_MFP_ENABLED;
9875	} else {
9876	ifmgd->mfp = IEEE80211_MFP_DISABLED;
9877	ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
9878	}
9879
9880	if (req->flags & ASSOC_REQ_USE_RRM)
9881	ifmgd->flags \|= IEEE80211_STA_ENABLE_RRM;
9882	else
9883	ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
9884
9885	if (req->crypto.control_port)
9886	ifmgd->flags \|= IEEE80211_STA_CONTROL_PORT;
9887	else
9888	ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
9889
9890	sdata->control_port_protocol = req->crypto.control_port_ethertype;
9891	sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
9892	sdata->control_port_over_nl80211 =
9893	req->crypto.control_port_over_nl80211;
9894	sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
9895
9896	/ kick off associate process /
9897	ifmgd->assoc_data = assoc_data;
9898
9899	for (i = `0`; i < ARRAY_SIZE(assoc_data->link); i++) {
9900	if (!assoc_data->link[i].bss)
9901	continue;
9902	if (i == assoc_data->assoc_link_id)
9903	continue;
9904	/ only calculate the mode, hence link == NULL /
9905	err = ieee80211_prep_channel(sdata, NULL, link_id: i,
9906	cbss: assoc_data->link[i].bss, mlo: true,
9907	conn: &assoc_data->link[i].conn,
9908	userspace_selectors: sdata->u.mgd.userspace_selectors);
9909	if (err) {
9910	req->links[i].error = err;
9911	goto err_clear;
9912	}
9913	}
9914
9915	memcpy(to: vif_cfg->ssid, from: assoc_data->ssid, len: assoc_data->ssid_len);
9916	vif_cfg->ssid_len = assoc_data->ssid_len;
9917
9918	/ needed for transmitting the assoc frames properly /
9919	memcpy(to: sdata->vif.cfg.ap_addr, from: assoc_data->ap_addr, ETH_ALEN);
9920
9921	err = ieee80211_prep_connection(sdata, cbss, link_id: req->link_id,
9922	ap_mld_addr: req->ap_mld_addr, assoc: true,
9923	conn: &assoc_data->link[assoc_link_id].conn,
9924	override,
9925	userspace_selectors: sdata->u.mgd.userspace_selectors);
9926	if (err)
9927	goto err_clear;
9928
9929	if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) {
9930	const struct cfg80211_bss_ies *beacon_ies;
9931
9932	rcu_read_lock();
9933	beacon_ies = rcu_dereference(req->bss->beacon_ies);
9934	if (!beacon_ies) {
9935	/*
9936	* Wait up to one beacon interval ...
9937	* should this be more if we miss one?
9938	*/
9939	sdata_info(sdata, "waiting for beacon from %pM\n",
9940	link->u.mgd.bssid);
9941	assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
9942	assoc_data->timeout_started = true;
9943	assoc_data->need_beacon = true;
9944	}
9945	rcu_read_unlock();
9946	}
9947
9948	run_again(sdata, timeout: assoc_data->timeout);
9949
9950	/ We are associating, clean up auth_data /
9951	if (ifmgd->auth_data)
9952	ieee80211_destroy_auth_data(sdata, assoc: true);
9953
9954	return `0`;
9955	err_clear:
9956	if (!ifmgd->auth_data) {
9957	eth_zero_addr(addr: sdata->deflink.u.mgd.bssid);
9958	ieee80211_link_info_change_notify(sdata, link: &sdata->deflink,
9959	changed: BSS_CHANGED_BSSID);
9960	}
9961	ifmgd->assoc_data = NULL;
9962	err_free:
9963	kfree(objp: assoc_data);
9964	return err;
9965	}
9966
9967	int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
9968	struct cfg80211_deauth_request *req)
9969	{
9970	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9971	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9972	bool tx = !req->local_state_change;
9973	struct ieee80211_prep_tx_info info = {
9974	.subtype = IEEE80211_STYPE_DEAUTH,
9975	};
9976
9977	if (ifmgd->auth_data &&
9978	ether_addr_equal(addr1: ifmgd->auth_data->ap_addr, addr2: req->bssid)) {
9979	sdata_info(sdata,
9980	"aborting authentication with %pM by local choice (Reason: %u=%s)\n",
9981	req->bssid, req->reason_code,
9982	ieee80211_get_reason_code_string(req->reason_code));
9983
9984	info.link_id = ifmgd->auth_data->link_id;
9985	drv_mgd_prepare_tx(local: sdata->local, sdata, info: &info);
9986	ieee80211_send_deauth_disassoc(sdata, da: req->bssid, bssid: req->bssid,
9987	IEEE80211_STYPE_DEAUTH,
9988	reason: req->reason_code, send_frame: tx,
9989	frame_buf);
9990	ieee80211_destroy_auth_data(sdata, assoc: false);
9991	ieee80211_report_disconnect(sdata, buf: frame_buf,
9992	len: sizeof(frame_buf), tx: true,
9993	reason: req->reason_code, reconnect: false);
9994	drv_mgd_complete_tx(local: sdata->local, sdata, info: &info);
9995	return `0`;
9996	}
9997
9998	if (ifmgd->assoc_data &&
9999	ether_addr_equal(addr1: ifmgd->assoc_data->ap_addr, addr2: req->bssid)) {
10000	sdata_info(sdata,
10001	"aborting association with %pM by local choice (Reason: %u=%s)\n",
10002	req->bssid, req->reason_code,
10003	ieee80211_get_reason_code_string(req->reason_code));
10004
10005	info.link_id = ifmgd->assoc_data->assoc_link_id;
10006	drv_mgd_prepare_tx(local: sdata->local, sdata, info: &info);
10007	ieee80211_send_deauth_disassoc(sdata, da: req->bssid, bssid: req->bssid,
10008	IEEE80211_STYPE_DEAUTH,
10009	reason: req->reason_code, send_frame: tx,
10010	frame_buf);
10011	ieee80211_destroy_assoc_data(sdata, status: ASSOC_ABANDON);
10012	ieee80211_report_disconnect(sdata, buf: frame_buf,
10013	len: sizeof(frame_buf), tx: true,
10014	reason: req->reason_code, reconnect: false);
10015	drv_mgd_complete_tx(local: sdata->local, sdata, info: &info);
10016	return `0`;
10017	}
10018
10019	if (ifmgd->associated &&
10020	ether_addr_equal(addr1: sdata->vif.cfg.ap_addr, addr2: req->bssid)) {
10021	sdata_info(sdata,
10022	"deauthenticating from %pM by local choice (Reason: %u=%s)\n",
10023	req->bssid, req->reason_code,
10024	ieee80211_get_reason_code_string(req->reason_code));
10025
10026	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
10027	reason: req->reason_code, tx, frame_buf);
10028	ieee80211_report_disconnect(sdata, buf: frame_buf,
10029	len: sizeof(frame_buf), tx: true,
10030	reason: req->reason_code, reconnect: false);
10031	return `0`;
10032	}
10033
10034	return -ENOTCONN;
10035	}
10036
10037	int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
10038	struct cfg80211_disassoc_request *req)
10039	{
10040	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
10041
10042	if (!sdata->u.mgd.associated \|\|
10043	memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN))
10044	return -ENOTCONN;
10045
10046	sdata_info(sdata,
10047	"disassociating from %pM by local choice (Reason: %u=%s)\n",
10048	req->ap_addr, req->reason_code,
10049	ieee80211_get_reason_code_string(req->reason_code));
10050
10051	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
10052	reason: req->reason_code, tx: !req->local_state_change,
10053	frame_buf);
10054
10055	ieee80211_report_disconnect(sdata, buf: frame_buf, len: sizeof(frame_buf), tx: true,
10056	reason: req->reason_code, reconnect: false);
10057
10058	return `0`;
10059	}
10060
10061	void ieee80211_mgd_stop_link(struct ieee80211_link_data *link)
10062	{
10063	wiphy_work_cancel(wiphy: link->sdata->local->hw.wiphy,
10064	work: &link->u.mgd.request_smps_work);
10065	wiphy_work_cancel(wiphy: link->sdata->local->hw.wiphy,
10066	work: &link->u.mgd.recalc_smps);
10067	wiphy_delayed_work_cancel(wiphy: link->sdata->local->hw.wiphy,
10068	dwork: &link->u.mgd.csa.switch_work);
10069	}
10070
10071	void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
10072	{
10073	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
10074
10075	/*
10076	* Make sure some work items will not run after this,
10077	* they will not do anything but might not have been
10078	* cancelled when disconnecting.
10079	*/
10080	wiphy_work_cancel(wiphy: sdata->local->hw.wiphy,
10081	work: &ifmgd->monitor_work);
10082	wiphy_work_cancel(wiphy: sdata->local->hw.wiphy,
10083	work: &ifmgd->beacon_connection_loss_work);
10084	wiphy_work_cancel(wiphy: sdata->local->hw.wiphy,
10085	work: &ifmgd->csa_connection_drop_work);
10086	wiphy_delayed_work_cancel(wiphy: sdata->local->hw.wiphy,
10087	dwork: &ifmgd->tdls_peer_del_work);
10088
10089	if (ifmgd->assoc_data)
10090	ieee80211_destroy_assoc_data(sdata, status: ASSOC_TIMEOUT);
10091	if (ifmgd->auth_data)
10092	ieee80211_destroy_auth_data(sdata, assoc: false);
10093	spin_lock_bh(lock: &ifmgd->teardown_lock);
10094	if (ifmgd->teardown_skb) {
10095	kfree_skb(skb: ifmgd->teardown_skb);
10096	ifmgd->teardown_skb = NULL;
10097	ifmgd->orig_teardown_skb = NULL;
10098	}
10099	kfree(objp: ifmgd->assoc_req_ies);
10100	ifmgd->assoc_req_ies = NULL;
10101	ifmgd->assoc_req_ies_len = `0`;
10102	spin_unlock_bh(lock: &ifmgd->teardown_lock);
10103	timer_delete_sync(timer: &ifmgd->timer);
10104	}
10105
10106	void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
10107	enum nl80211_cqm_rssi_threshold_event rssi_event,
10108	s32 rssi_level,
10109	gfp_t gfp)
10110	{
10111	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
10112
10113	trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
10114
10115	cfg80211_cqm_rssi_notify(dev: sdata->dev, rssi_event, rssi_level, gfp);
10116	}
10117	EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
10118
10119	void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
10120	{
10121	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
10122
10123	trace_api_cqm_beacon_loss_notify(local: sdata->local, sdata);
10124
10125	cfg80211_cqm_beacon_loss_notify(dev: sdata->dev, gfp);
10126	}
10127	EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
10128
10129	static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
10130	int rssi_min_thold,
10131	int rssi_max_thold)
10132	{
10133	trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
10134
10135	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
10136	return;
10137
10138	/*
10139	* Scale up threshold values before storing it, as the RSSI averaging
10140	* algorithm uses a scaled up value as well. Change this scaling
10141	* factor if the RSSI averaging algorithm changes.
10142	*/
10143	sdata->u.mgd.rssi_min_thold = rssi_min_thold*`16`;
10144	sdata->u.mgd.rssi_max_thold = rssi_max_thold*`16`;
10145	}
10146
10147	void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
10148	int rssi_min_thold,
10149	int rssi_max_thold)
10150	{
10151	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
10152
10153	WARN_ON(rssi_min_thold == rssi_max_thold \|\|
10154	rssi_min_thold > rssi_max_thold);
10155
10156	_ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
10157	rssi_max_thold);
10158	}
10159	EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
10160
10161	void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
10162	{
10163	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
10164
10165	_ieee80211_enable_rssi_reports(sdata, rssi_min_thold: `0`, rssi_max_thold: `0`);
10166	}
10167	EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
10168
10169	void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata,
10170	struct ieee80211_mgmt *mgmt, size_t len)
10171	{
10172	struct ieee80211_local *local = sdata->local;
10173	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
10174	struct ieee80211_mgd_assoc_data *add_links_data =
10175	ifmgd->reconf.add_links_data;
10176	struct sta_info *sta;
10177	struct cfg80211_mlo_reconf_done_data done_data = {};
10178	u16 sta_changed_links = sdata->u.mgd.reconf.added_links \|
10179	sdata->u.mgd.reconf.removed_links;
10180	u16 link_mask, valid_links;
10181	unsigned int link_id;
10182	size_t orig_len = len;
10183	u8 i, group_key_data_len;
10184	u8 *pos;
10185
10186	if (!ieee80211_vif_is_mld(vif: &sdata->vif) \|\|
10187	len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) \|\|
10188	mgmt->u.action.u.ml_reconf_resp.dialog_token !=
10189	sdata->u.mgd.reconf.dialog_token \|\|
10190	!sta_changed_links)
10191	return;
10192
10193	pos = mgmt->u.action.u.ml_reconf_resp.variable;
10194	len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp);
10195
10196	/ each status duple is 3 octets /
10197	if (len < mgmt->u.action.u.ml_reconf_resp.count * `3`) {
10198	sdata_info(sdata,
10199	"mlo: reconf: unexpected len=%zu, count=%u\n",
10200	len, mgmt->u.action.u.ml_reconf_resp.count);
10201	goto disconnect;
10202	}
10203
10204	link_mask = sta_changed_links;
10205	for (i = `0`; i < mgmt->u.action.u.ml_reconf_resp.count; i++) {
10206	u16 status = get_unaligned_le16(p: pos + `1`);
10207
10208	link_id = *pos;
10209
10210	if (!(link_mask & BIT(link_id))) {
10211	sdata_info(sdata,
10212	"mlo: reconf: unexpected link: %u, changed=0x%x\n",
10213	link_id, sta_changed_links);
10214	goto disconnect;
10215	}
10216
10217	/ clear the corresponding link, to detect the case that*
10218	* the same link was included more than one time
10219	*/
10220	link_mask &= ~BIT(link_id);
10221
10222	/ Handle failure to remove links here. Failure to remove added*
10223	* links will be done later in the flow.
10224	*/
10225	if (status != WLAN_STATUS_SUCCESS) {
10226	sdata_info(sdata,
10227	"mlo: reconf: failed on link=%u, status=%u\n",
10228	link_id, status);
10229
10230	/ The AP MLD failed to remove a link that was already*
10231	* removed locally. As this is not expected behavior,
10232	* disconnect
10233	*/
10234	if (sdata->u.mgd.reconf.removed_links & BIT(link_id))
10235	goto disconnect;
10236
10237	/ The AP MLD failed to add a link. Remove it from the*
10238	* added links.
10239	*/
10240	sdata->u.mgd.reconf.added_links &= ~BIT(link_id);
10241	}
10242
10243	pos += `3`;
10244	len -= `3`;
10245	}
10246
10247	if (link_mask) {
10248	sdata_info(sdata,
10249	"mlo: reconf: no response for links=0x%x\n",
10250	link_mask);
10251	goto disconnect;
10252	}
10253
10254	if (!sdata->u.mgd.reconf.added_links)
10255	goto out;
10256
10257	if (len < `1` \|\| len < `1` + *pos) {
10258	sdata_info(sdata,
10259	"mlo: reconf: invalid group key data length");
10260	goto disconnect;
10261	}
10262
10263	/ The Group Key Data field must be present when links are added. This*
10264	* field should be processed by userland.
10265	*/
10266	group_key_data_len = *pos++;
10267
10268	pos += group_key_data_len;
10269	len -= group_key_data_len + `1`;
10270
10271	/ Process the information for the added links /
10272	sta = sta_info_get(sdata, addr: sdata->vif.cfg.ap_addr);
10273	if (WARN_ON(!sta))
10274	goto disconnect;
10275
10276	valid_links = sdata->vif.valid_links;
10277	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
10278	if (!add_links_data->link[link_id].bss \|\|
10279	!(sdata->u.mgd.reconf.added_links & BIT(link_id)))
10280	continue;
10281
10282	valid_links \|= BIT(link_id);
10283	if (ieee80211_sta_allocate_link(sta, link_id))
10284	goto disconnect;
10285	}
10286
10287	ieee80211_vif_set_links(sdata, new_links: valid_links, dormant_links: sdata->vif.dormant_links);
10288	link_mask = `0`;
10289	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
10290	struct cfg80211_bss *cbss = add_links_data->link[link_id].bss;
10291	struct ieee80211_link_data *link;
10292	struct link_sta_info *link_sta;
10293	u64 changed = `0`;
10294
10295	if (!cbss)
10296	continue;
10297
10298	link = sdata_dereference(sdata->link[link_id], sdata);
10299	if (WARN_ON(!link))
10300	goto disconnect;
10301
10302	link_info(link,
10303	"mlo: reconf: local address %pM, AP link address %pM\n",
10304	add_links_data->link[link_id].addr,
10305	add_links_data->link[link_id].bss->bssid);
10306
10307	link_sta = rcu_dereference_protected(sta->link[link_id],
10308	lockdep_is_held(&local->hw.wiphy->mtx));
10309	if (WARN_ON(!link_sta))
10310	goto disconnect;
10311
10312	if (!link->u.mgd.have_beacon) {
10313	const struct cfg80211_bss_ies *ies;
10314
10315	rcu_read_lock();
10316	ies = rcu_dereference(cbss->beacon_ies);
10317	if (ies)
10318	link->u.mgd.have_beacon = true;
10319	else
10320	ies = rcu_dereference(cbss->ies);
10321	ieee80211_get_dtim(ies,
10322	dtim_count: &link->conf->sync_dtim_count,
10323	dtim_period: &link->u.mgd.dtim_period);
10324	link->conf->beacon_int = cbss->beacon_interval;
10325	rcu_read_unlock();
10326	}
10327
10328	link->conf->dtim_period = link->u.mgd.dtim_period ?: `1`;
10329
10330	link->u.mgd.conn = add_links_data->link[link_id].conn;
10331	if (ieee80211_prep_channel(sdata, link, link_id, cbss,
10332	mlo: true, conn: &link->u.mgd.conn,
10333	userspace_selectors: sdata->u.mgd.userspace_selectors)) {
10334	link_info(link, "mlo: reconf: prep_channel failed\n");
10335	goto disconnect;
10336	}
10337
10338	if (ieee80211_mgd_setup_link_sta(link, sta, link_sta,
10339	cbss: add_links_data->link[link_id].bss))
10340	goto disconnect;
10341
10342	if (!ieee80211_assoc_config_link(link, link_sta,
10343	cbss: add_links_data->link[link_id].bss,
10344	mgmt, elem_start: pos, elem_len: len,
10345	changed: &changed))
10346	goto disconnect;
10347
10348	/ The AP MLD indicated success for this link, but the station*
10349	* profile status indicated otherwise. Since there is an
10350	* inconsistency in the ML reconfiguration response, disconnect
10351	*/
10352	if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS)
10353	goto disconnect;
10354
10355	ieee80211_sta_init_nss(link_sta);
10356	if (ieee80211_sta_activate_link(sta, link_id))
10357	goto disconnect;
10358
10359	changed \|= ieee80211_link_set_associated(link, cbss);
10360	ieee80211_link_info_change_notify(sdata, link, changed);
10361
10362	ieee80211_recalc_smps(sdata, link);
10363	link_mask \|= BIT(link_id);
10364	}
10365
10366	sdata_info(sdata,
10367	"mlo: reconf: current valid_links=0x%x, added=0x%x\n",
10368	valid_links, link_mask);
10369
10370	/ links might have changed due to rejected ones, set them again /
10371	ieee80211_vif_set_links(sdata, new_links: valid_links, dormant_links: sdata->vif.dormant_links);
10372	ieee80211_vif_cfg_change_notify(sdata, changed: BSS_CHANGED_MLD_VALID_LINKS);
10373
10374	ieee80211_recalc_ps(local);
10375	ieee80211_recalc_ps_vif(sdata);
10376
10377	done_data.buf = (const u8 *)mgmt;
10378	done_data.len = orig_len;
10379	done_data.added_links = link_mask;
10380
10381	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
10382	done_data.links[link_id].bss = add_links_data->link[link_id].bss;
10383	done_data.links[link_id].addr =
10384	add_links_data->link[link_id].addr;
10385	}
10386
10387	cfg80211_mlo_reconf_add_done(dev: sdata->dev, data: &done_data);
10388	kfree(objp: sdata->u.mgd.reconf.add_links_data);
10389	sdata->u.mgd.reconf.add_links_data = NULL;
10390	out:
10391	ieee80211_ml_reconf_reset(sdata);
10392	return;
10393
10394	disconnect:
10395	__ieee80211_disconnect(sdata);
10396	}
10397
10398	static struct sk_buff *
10399	ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata,
10400	struct ieee80211_mgd_assoc_data *add_links_data,
10401	u16 removed_links, __le16 ext_mld_capa_ops)
10402	{
10403	struct ieee80211_local *local = sdata->local;
10404	struct ieee80211_mgmt *mgmt;
10405	struct ieee80211_multi_link_elem *ml_elem;
10406	struct ieee80211_mle_basic_common_info *common;
10407	enum nl80211_iftype iftype = ieee80211_vif_type_p2p(vif: &sdata->vif);
10408	struct sk_buff *skb;
10409	size_t size;
10410	unsigned int link_id;
10411	__le16 eml_capa = `0`, mld_capa_ops = `0`;
10412	struct ieee80211_tx_info *info;
10413	u8 common_size, var_common_size;
10414	u8 *ml_elem_len;
10415	u16 capab = `0`;
10416
10417	size = local->hw.extra_tx_headroom + sizeof(*mgmt);
10418
10419	/ Consider the maximal length of the reconfiguration ML element /
10420	size += sizeof(struct ieee80211_multi_link_elem);
10421
10422	/ The Basic ML element and the Reconfiguration ML element have the same*
10423	* fixed common information fields in the context of ML reconfiguration
10424	* action frame. The AP MLD MAC address must always be present
10425	*/
10426	common_size = sizeof(*common);
10427
10428	/ when adding links, the MLD capabilities must be present /
10429	var_common_size = `0`;
10430	if (add_links_data) {
10431	const struct wiphy_iftype_ext_capab *ift_ext_capa =
10432	cfg80211_get_iftype_ext_capa(wiphy: local->hw.wiphy,
10433	type: ieee80211_vif_type_p2p(vif: &sdata->vif));
10434
10435	if (ift_ext_capa) {
10436	eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities);
10437	mld_capa_ops =
10438	cpu_to_le16(ift_ext_capa->mld_capa_and_ops);
10439	}
10440
10441	/ MLD capabilities and operation /
10442	var_common_size += `2`;
10443
10444	/ EML capabilities /
10445	if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP \|
10446	IEEE80211_EML_CAP_EMLMR_SUPPORT)))
10447	var_common_size += `2`;
10448	}
10449
10450	if (ext_mld_capa_ops)
10451	var_common_size += `2`;
10452
10453	/ Add the common information length /
10454	size += common_size + var_common_size;
10455
10456	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
10457	struct cfg80211_bss *cbss;
10458	size_t elems_len;
10459
10460	if (removed_links & BIT(link_id)) {
10461	size += sizeof(struct ieee80211_mle_per_sta_profile) +
10462	ETH_ALEN;
10463	continue;
10464	}
10465
10466	if (!add_links_data \|\| !add_links_data->link[link_id].bss)
10467	continue;
10468
10469	elems_len = add_links_data->link[link_id].elems_len;
10470	cbss = add_links_data->link[link_id].bss;
10471
10472	/ should be the same across all BSSes /
10473	if (cbss->capability & WLAN_CAPABILITY_PRIVACY)
10474	capab \|= WLAN_CAPABILITY_PRIVACY;
10475
10476	size += `2` + sizeof(struct ieee80211_mle_per_sta_profile) +
10477	ETH_ALEN;
10478
10479	/ WMM /
10480	size += `9`;
10481	size += ieee80211_link_common_elems_size(sdata, iftype, cbss,
10482	elems_len);
10483	}
10484
10485	skb = alloc_skb(size, GFP_KERNEL);
10486	if (!skb)
10487	return NULL;
10488
10489	skb_reserve(skb, len: local->hw.extra_tx_headroom);
10490	mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt,
10491	u.action.u.ml_reconf_req));
10492
10493	/ Add the MAC header /
10494	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT \|
10495	IEEE80211_STYPE_ACTION);
10496	memcpy(to: mgmt->da, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
10497	memcpy(to: mgmt->sa, from: sdata->vif.addr, ETH_ALEN);
10498	memcpy(to: mgmt->bssid, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
10499
10500	/ Add the action frame fixed fields /
10501	mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT;
10502	mgmt->u.action.u.ml_reconf_req.action_code =
10503	WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ;
10504
10505	/ allocate a dialog token and store it /
10506	sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc;
10507	mgmt->u.action.u.ml_reconf_req.dialog_token =
10508	sdata->u.mgd.reconf.dialog_token;
10509
10510	/ Add the ML reconfiguration element and the common information /
10511	skb_put_u8(skb, val: WLAN_EID_EXTENSION);
10512	ml_elem_len = skb_put(skb, len: `1`);
10513	skb_put_u8(skb, val: WLAN_EID_EXT_EHT_MULTI_LINK);
10514	ml_elem = skb_put(skb, len: sizeof(*ml_elem));
10515	ml_elem->control =
10516	cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF \|
10517	IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR);
10518	common = skb_put(skb, len: common_size);
10519	common->len = common_size + var_common_size;
10520	memcpy(to: common->mld_mac_addr, from: sdata->vif.addr, ETH_ALEN);
10521
10522	if (add_links_data) {
10523	if (eml_capa &
10524	cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP \|
10525	IEEE80211_EML_CAP_EMLMR_SUPPORT))) {
10526	ml_elem->control \|=
10527	cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA);
10528	skb_put_data(skb, data: &eml_capa, len: sizeof(eml_capa));
10529	}
10530
10531	ml_elem->control \|=
10532	cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP);
10533
10534	skb_put_data(skb, data: &mld_capa_ops, len: sizeof(mld_capa_ops));
10535	}
10536
10537	if (ext_mld_capa_ops) {
10538	ml_elem->control \|=
10539	cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP);
10540	skb_put_data(skb, data: &ext_mld_capa_ops, len: sizeof(ext_mld_capa_ops));
10541	}
10542
10543	if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM)
10544	capab \|= WLAN_CAPABILITY_RADIO_MEASURE;
10545
10546	/ Add the per station profile /
10547	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
10548	u8 *subelem_len = NULL;
10549	u16 ctrl;
10550	const u8 *addr;
10551
10552	/ Skip links that are not changing /
10553	if (!(removed_links & BIT(link_id)) &&
10554	(!add_links_data \|\| !add_links_data->link[link_id].bss))
10555	continue;
10556
10557	ctrl = link_id \|
10558	IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT;
10559
10560	if (removed_links & BIT(link_id)) {
10561	struct ieee80211_bss_conf *conf =
10562	sdata_dereference(sdata->vif.link_conf[link_id],
10563	sdata);
10564	if (!conf)
10565	continue;
10566
10567	addr = conf->addr;
10568	ctrl \|= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK,
10569	IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE);
10570	} else {
10571	addr = add_links_data->link[link_id].addr;
10572	ctrl \|= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE \|
10573	u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK,
10574	IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE);
10575	}
10576
10577	skb_put_u8(skb, val: IEEE80211_MLE_SUBELEM_PER_STA_PROFILE);
10578	subelem_len = skb_put(skb, len: `1`);
10579
10580	put_unaligned_le16(val: ctrl, p: skb_put(skb, len: sizeof(ctrl)));
10581	skb_put_u8(skb, val: `1` + ETH_ALEN);
10582	skb_put_data(skb, data: addr, ETH_ALEN);
10583
10584	if (!(removed_links & BIT(link_id))) {
10585	u16 link_present_elems[PRESENT_ELEMS_MAX] = {};
10586	size_t extra_used;
10587	void *capab_pos;
10588	u8 qos_info;
10589
10590	capab_pos = skb_put(skb, len: `2`);
10591
10592	extra_used =
10593	ieee80211_add_link_elems(sdata, skb, capab: &capab, NULL,
10594	extra_elems: add_links_data->link[link_id].elems,
10595	extra_elems_len: add_links_data->link[link_id].elems_len,
10596	link_id, NULL,
10597	present_elems: link_present_elems,
10598	assoc_data: add_links_data);
10599
10600	if (add_links_data->link[link_id].elems)
10601	skb_put_data(skb,
10602	data: add_links_data->link[link_id].elems +
10603	extra_used,
10604	len: add_links_data->link[link_id].elems_len -
10605	extra_used);
10606	if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) {
10607	qos_info = sdata->u.mgd.uapsd_queues;
10608	qos_info \|= (sdata->u.mgd.uapsd_max_sp_len <<
10609	IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
10610	} else {
10611	qos_info = `0`;
10612	}
10613
10614	ieee80211_add_wmm_info_ie(buf: skb_put(skb, len: `9`), qosinfo: qos_info);
10615	put_unaligned_le16(val: capab, p: capab_pos);
10616	}
10617
10618	ieee80211_fragment_element(skb, len_pos: subelem_len,
10619	frag_id: IEEE80211_MLE_SUBELEM_FRAGMENT);
10620	}
10621
10622	ieee80211_fragment_element(skb, len_pos: ml_elem_len, frag_id: WLAN_EID_FRAGMENT);
10623
10624	info = IEEE80211_SKB_CB(skb);
10625	info->flags \|= IEEE80211_TX_CTL_REQ_TX_STATUS;
10626
10627	return skb;
10628	}
10629
10630	int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata,
10631	struct cfg80211_ml_reconf_req *req)
10632	{
10633	struct ieee80211_local *local = sdata->local;
10634	struct ieee80211_mgd_assoc_data *data = NULL;
10635	struct sta_info *sta;
10636	struct sk_buff *skb;
10637	u16 added_links, new_valid_links;
10638	int link_id, err;
10639
10640	if (!ieee80211_vif_is_mld(vif: &sdata->vif) \|\|
10641	!(sdata->vif.cfg.mld_capa_op &
10642	IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT))
10643	return -EINVAL;
10644
10645	/ No support for concurrent ML reconfiguration operation /
10646	if (sdata->u.mgd.reconf.added_links \|\|
10647	sdata->u.mgd.reconf.removed_links)
10648	return -EBUSY;
10649
10650	added_links = `0`;
10651	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
10652	if (!req->add_links[link_id].bss)
10653	continue;
10654
10655	added_links \|= BIT(link_id);
10656	}
10657
10658	sta = sta_info_get(sdata, addr: sdata->vif.cfg.ap_addr);
10659	if (WARN_ON(!sta))
10660	return -ENOLINK;
10661
10662	/ Adding links to the set of valid link is done only after a successful*
10663	* ML reconfiguration frame exchange. Here prepare the data for the ML
10664	* reconfiguration frame construction and allocate the required
10665	* resources
10666	*/
10667	if (added_links) {
10668	bool uapsd_supported;
10669
10670	data = kzalloc(sizeof(*data), GFP_KERNEL);
10671	if (!data)
10672	return -ENOMEM;
10673
10674	data->assoc_link_id = -`1`;
10675	data->wmm = true;
10676
10677	uapsd_supported = true;
10678	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS;
10679	link_id++) {
10680	struct ieee80211_supported_band *sband;
10681	struct cfg80211_bss *link_cbss =
10682	req->add_links[link_id].bss;
10683	struct ieee80211_bss *bss;
10684
10685	if (!link_cbss)
10686	continue;
10687
10688	bss = (void *)link_cbss->priv;
10689
10690	if (!bss->wmm_used) {
10691	err = -EINVAL;
10692	goto err_free;
10693	}
10694
10695	if (link_cbss->channel->band == NL80211_BAND_S1GHZ) {
10696	err = -EINVAL;
10697	goto err_free;
10698	}
10699
10700	eth_random_addr(addr: data->link[link_id].addr);
10701	data->link[link_id].conn =
10702	ieee80211_conn_settings_unlimited;
10703	sband =
10704	local->hw.wiphy->bands[link_cbss->channel->band];
10705
10706	ieee80211_determine_our_sta_mode(sdata, sband,
10707	NULL, wmm_used: true, link_id,
10708	conn: &data->link[link_id].conn);
10709
10710	data->link[link_id].bss = link_cbss;
10711	data->link[link_id].disabled =
10712	req->add_links[link_id].disabled;
10713	data->link[link_id].elems =
10714	(u8 *)req->add_links[link_id].elems;
10715	data->link[link_id].elems_len =
10716	req->add_links[link_id].elems_len;
10717
10718	if (!bss->uapsd_supported)
10719	uapsd_supported = false;
10720
10721	if (data->link[link_id].conn.mode <
10722	IEEE80211_CONN_MODE_EHT) {
10723	err = -EINVAL;
10724	goto err_free;
10725	}
10726
10727	err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data: data,
10728	link_id);
10729	if (err) {
10730	err = -EINVAL;
10731	goto err_free;
10732	}
10733	}
10734
10735	/ Require U-APSD support if we enabled it /
10736	if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED &&
10737	!uapsd_supported) {
10738	err = -EINVAL;
10739	sdata_info(sdata, "U-APSD on but not available on (all) new links\n");
10740	goto err_free;
10741	}
10742
10743	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS;
10744	link_id++) {
10745	if (!data->link[link_id].bss)
10746	continue;
10747
10748	/ only used to verify the mode, nothing is allocated /
10749	err = ieee80211_prep_channel(sdata, NULL, link_id,
10750	cbss: data->link[link_id].bss,
10751	mlo: true,
10752	conn: &data->link[link_id].conn,
10753	userspace_selectors: sdata->u.mgd.userspace_selectors);
10754	if (err)
10755	goto err_free;
10756	}
10757	}
10758
10759	/ link removal is done before the ML reconfiguration frame exchange so*
10760	* that these links will not be used between their removal by the AP MLD
10761	* and before the station got the ML reconfiguration response. Based on
10762	* Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the
10763	* link removal request.
10764	*/
10765	if (req->rem_links) {
10766	u16 new_active_links =
10767	sdata->vif.active_links & ~req->rem_links;
10768
10769	new_valid_links = sdata->vif.valid_links & ~req->rem_links;
10770
10771	/ Should not be left with no valid links to perform the*
10772	* ML reconfiguration
10773	*/
10774	if (!new_valid_links \|\|
10775	!(new_valid_links & ~sdata->vif.dormant_links)) {
10776	sdata_info(sdata, "mlo: reconf: no valid links\n");
10777	err = -EINVAL;
10778	goto err_free;
10779	}
10780
10781	if (new_active_links != sdata->vif.active_links) {
10782	if (!new_active_links)
10783	new_active_links =
10784	BIT(__ffs(new_valid_links &
10785	~sdata->vif.dormant_links));
10786
10787	err = ieee80211_set_active_links(vif: &sdata->vif,
10788	active_links: new_active_links);
10789	if (err) {
10790	sdata_info(sdata,
10791	"mlo: reconf: failed set active links\n");
10792	goto err_free;
10793	}
10794	}
10795	}
10796
10797	/ Build the SKB before the link removal as the construction of the*
10798	* station info for removed links requires the local address.
10799	* Invalidate the removed links, so that the transmission of the ML
10800	* reconfiguration request frame would not be done using them, as the AP
10801	* is expected to send the ML reconfiguration response frame on the link
10802	* on which the request was received.
10803	*/
10804	skb = ieee80211_build_ml_reconf_req(sdata, add_links_data: data, removed_links: req->rem_links,
10805	cpu_to_le16(req->ext_mld_capa_ops));
10806	if (!skb) {
10807	err = -ENOMEM;
10808	goto err_free;
10809	}
10810
10811	if (req->rem_links) {
10812	u16 new_dormant_links =
10813	sdata->vif.dormant_links & ~req->rem_links;
10814
10815	err = ieee80211_vif_set_links(sdata, new_links: new_valid_links,
10816	dormant_links: new_dormant_links);
10817	if (err) {
10818	sdata_info(sdata,
10819	"mlo: reconf: failed set valid links\n");
10820	kfree_skb(skb);
10821	goto err_free;
10822	}
10823
10824	for (link_id = `0`; link_id < IEEE80211_MLD_MAX_NUM_LINKS;
10825	link_id++) {
10826	if (!(req->rem_links & BIT(link_id)))
10827	continue;
10828
10829	ieee80211_sta_remove_link(sta, link_id);
10830	}
10831
10832	/ notify the driver and upper layers /
10833	ieee80211_vif_cfg_change_notify(sdata,
10834	changed: BSS_CHANGED_MLD_VALID_LINKS);
10835	cfg80211_links_removed(dev: sdata->dev, link_mask: req->rem_links);
10836	}
10837
10838	sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n",
10839	added_links, req->rem_links);
10840
10841	ieee80211_tx_skb(sdata, skb);
10842
10843	sdata->u.mgd.reconf.added_links = added_links;
10844	sdata->u.mgd.reconf.add_links_data = data;
10845	sdata->u.mgd.reconf.removed_links = req->rem_links;
10846	wiphy_delayed_work_queue(wiphy: sdata->local->hw.wiphy,
10847	dwork: &sdata->u.mgd.reconf.wk,
10848	IEEE80211_ASSOC_TIMEOUT_SHORT);
10849	return `0`;
10850
10851	err_free:
10852	kfree(objp: data);
10853	return err;
10854	}
10855
10856	static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata)
10857	{
10858	unsigned long valid_links = sdata->vif.valid_links;
10859	u8 link_id;
10860
10861	lockdep_assert_wiphy(sdata->local->hw.wiphy);
10862
10863	if (!ieee80211_vif_is_mld(vif: &sdata->vif))
10864	return false;
10865
10866	for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) {
10867	struct ieee80211_bss_conf *bss_conf =
10868	sdata_dereference(sdata->vif.link_conf[link_id], sdata);
10869
10870	if (WARN_ON(!bss_conf) \|\| !bss_conf->epcs_support)
10871	return false;
10872	}
10873
10874	return true;
10875	}
10876
10877	int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable)
10878	{
10879	struct ieee80211_local *local = sdata->local;
10880	struct ieee80211_mgmt *mgmt;
10881	struct sk_buff *skb;
10882	int frame_len = offsetofend(struct ieee80211_mgmt,
10883	u.action.u.epcs) + (enable ? `1` : `0`);
10884
10885	if (!ieee80211_mgd_epcs_supp(sdata))
10886	return -EINVAL;
10887
10888	if (sdata->u.mgd.epcs.enabled == enable &&
10889	!sdata->u.mgd.epcs.dialog_token)
10890	return `0`;
10891
10892	/ Do not allow enabling EPCS if the AP didn't respond yet.*
10893	* However, allow disabling EPCS in such a case.
10894	*/
10895	if (sdata->u.mgd.epcs.dialog_token && enable)
10896	return -EALREADY;
10897
10898	skb = dev_alloc_skb(length: local->hw.extra_tx_headroom + frame_len);
10899	if (!skb)
10900	return -ENOBUFS;
10901
10902	skb_reserve(skb, len: local->hw.extra_tx_headroom);
10903	mgmt = skb_put_zero(skb, len: frame_len);
10904	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT \|
10905	IEEE80211_STYPE_ACTION);
10906	memcpy(to: mgmt->da, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
10907	memcpy(to: mgmt->sa, from: sdata->vif.addr, ETH_ALEN);
10908	memcpy(to: mgmt->bssid, from: sdata->vif.cfg.ap_addr, ETH_ALEN);
10909
10910	mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT;
10911	if (enable) {
10912	u8 *pos = mgmt->u.action.u.epcs.variable;
10913
10914	mgmt->u.action.u.epcs.action_code =
10915	WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ;
10916
10917	*pos = ++sdata->u.mgd.dialog_token_alloc;
10918	sdata->u.mgd.epcs.dialog_token = *pos;
10919	} else {
10920	mgmt->u.action.u.epcs.action_code =
10921	WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN;
10922
10923	ieee80211_epcs_teardown(sdata);
10924	ieee80211_epcs_changed(sdata, enabled: false);
10925	}
10926
10927	ieee80211_tx_skb(sdata, skb);
10928	return `0`;
10929	}
10930
10931	static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata,
10932	struct ieee802_11_elems *elems)
10933	{
10934	const struct element *sub;
10935	size_t scratch_len = elems->ml_epcs_len;
10936	u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL);
10937
10938	lockdep_assert_wiphy(sdata->local->hw.wiphy);
10939
10940	if (!ieee80211_vif_is_mld(vif: &sdata->vif) \|\| !elems->ml_epcs)
10941	return;
10942
10943	if (WARN_ON(!scratch))
10944	return;
10945
10946	/ Directly parse the sub elements as the common information doesn't*
10947	* hold any useful information.
10948	*/
10949	for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs,
10950	elems->ml_epcs_len) {
10951	struct ieee802_11_elems *link_elems __free(kfree) = NULL;
10952	struct ieee80211_link_data *link;
10953	u8 pos = (void* *)sub->data;
10954	u16 control;
10955	ssize_t len;
10956	u8 link_id;
10957
10958	if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE)
10959	continue;
10960
10961	if (sub->datalen < sizeof(control))
10962	break;
10963
10964	control = get_unaligned_le16(p: pos);
10965	link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID;
10966
10967	link = sdata_dereference(sdata->link[link_id], sdata);
10968	if (!link)
10969	continue;
10970
10971	len = cfg80211_defragment_element(elem: sub, ies: (u8 *)elems->ml_epcs,
10972	ieslen: elems->ml_epcs_len,
10973	data: scratch, data_len: scratch_len,
10974	frag_id: IEEE80211_MLE_SUBELEM_FRAGMENT);
10975	if (len < (ssize_t)sizeof(control))
10976	continue;
10977
10978	pos = scratch + sizeof(control);
10979	len -= sizeof(control);
10980
10981	link_elems = ieee802_11_parse_elems(start: pos, len, action: false, NULL);
10982	if (!link_elems)
10983	continue;
10984
10985	if (ieee80211_sta_wmm_params(local: sdata->local, link,
10986	wmm_param: link_elems->wmm_param,
10987	wmm_param_len: link_elems->wmm_param_len,
10988	mu_edca: link_elems->mu_edca_param_set))
10989	ieee80211_link_info_change_notify(sdata, link,
10990	changed: BSS_CHANGED_QOS);
10991	}
10992	}
10993
10994	void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata,
10995	struct ieee80211_mgmt *mgmt, size_t len)
10996	{
10997	struct ieee802_11_elems *elems __free(kfree) = NULL;
10998	size_t ies_len;
10999	u16 status_code;
11000	u8 *pos, dialog_token;
11001
11002	if (!ieee80211_mgd_epcs_supp(sdata))
11003	return;
11004
11005	/ Handle dialog token and status code /
11006	pos = mgmt->u.action.u.epcs.variable;
11007	dialog_token = *pos;
11008	status_code = get_unaligned_le16(p: pos + `1`);
11009
11010	/ An EPCS enable response with dialog token == 0 is an unsolicited*
11011	* notification from the AP MLD. In such a case, EPCS should already be
11012	* enabled and status must be success
11013	*/
11014	if (!dialog_token &&
11015	(!sdata->u.mgd.epcs.enabled \|\|
11016	status_code != WLAN_STATUS_SUCCESS))
11017	return;
11018
11019	if (sdata->u.mgd.epcs.dialog_token != dialog_token)
11020	return;
11021
11022	sdata->u.mgd.epcs.dialog_token = `0`;
11023
11024	if (status_code != WLAN_STATUS_SUCCESS)
11025	return;
11026
11027	pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN;
11028	ies_len = len - offsetof(struct ieee80211_mgmt,
11029	u.action.u.epcs.variable) -
11030	IEEE80211_EPCS_ENA_RESP_BODY_LEN;
11031
11032	elems = ieee802_11_parse_elems(start: pos, len: ies_len, action: true, NULL);
11033	if (!elems)
11034	return;
11035
11036	ieee80211_ml_epcs(sdata, elems);
11037	ieee80211_epcs_changed(sdata, enabled: true);
11038	}
11039
11040	void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata,
11041	struct ieee80211_mgmt *mgmt, size_t len)
11042	{
11043	if (!ieee80211_vif_is_mld(vif: &sdata->vif) \|\|
11044	!sdata->u.mgd.epcs.enabled)
11045	return;
11046
11047	ieee80211_epcs_teardown(sdata);
11048	ieee80211_epcs_changed(sdata, enabled: false);
11049	}
11050

Browse the source code of Linux/net/mac80211/mlme.c