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 - 2021 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 <asm/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 #define IEEE80211_AUTH_TIMEOUT		(HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG	(HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT	(HZ / 10)
37 #define IEEE80211_AUTH_TIMEOUT_SAE	(HZ * 2)
38 #define IEEE80211_AUTH_MAX_TRIES	3
39 #define IEEE80211_AUTH_WAIT_ASSOC	(HZ * 5)
40 #define IEEE80211_AUTH_WAIT_SAE_RETRY	(HZ * 2)
41 #define IEEE80211_ASSOC_TIMEOUT		(HZ / 5)
42 #define IEEE80211_ASSOC_TIMEOUT_LONG	(HZ / 2)
43 #define IEEE80211_ASSOC_TIMEOUT_SHORT	(HZ / 10)
44 #define IEEE80211_ASSOC_MAX_TRIES	3
45 
46 static int max_nullfunc_tries = 2;
47 module_param(max_nullfunc_tries, int, 0644);
48 MODULE_PARM_DESC(max_nullfunc_tries,
49 		 "Maximum nullfunc tx tries before disconnecting (reason 4).");
50 
51 static int max_probe_tries = 5;
52 module_param(max_probe_tries, int, 0644);
53 MODULE_PARM_DESC(max_probe_tries,
54 		 "Maximum probe tries before disconnecting (reason 4).");
55 
56 /*
57  * Beacon loss timeout is calculated as N frames times the
58  * advertised beacon interval.  This may need to be somewhat
59  * higher than what hardware might detect to account for
60  * delays in the host processing frames. But since we also
61  * probe on beacon miss before declaring the connection lost
62  * default to what we want.
63  */
64 static int beacon_loss_count = 7;
65 module_param(beacon_loss_count, int, 0644);
66 MODULE_PARM_DESC(beacon_loss_count,
67 		 "Number of beacon intervals before we decide beacon was lost.");
68 
69 /*
70  * Time the connection can be idle before we probe
71  * it to see if we can still talk to the AP.
72  */
73 #define IEEE80211_CONNECTION_IDLE_TIME	(30 * HZ)
74 /*
75  * Time we wait for a probe response after sending
76  * a probe request because of beacon loss or for
77  * checking the connection still works.
78  */
79 static int probe_wait_ms = 500;
80 module_param(probe_wait_ms, int, 0644);
81 MODULE_PARM_DESC(probe_wait_ms,
82 		 "Maximum time(ms) to wait for probe response"
83 		 " before disconnecting (reason 4).");
84 
85 /*
86  * How many Beacon frames need to have been used in average signal strength
87  * before starting to indicate signal change events.
88  */
89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT	4
90 
91 /*
92  * We can have multiple work items (and connection probing)
93  * scheduling this timer, but we need to take care to only
94  * reschedule it when it should fire _earlier_ than it was
95  * asked for before, or if it's not pending right now. This
96  * function ensures that. Note that it then is required to
97  * run this function for all timeouts after the first one
98  * has happened -- the work that runs from this timer will
99  * do that.
100  */
run_again(struct ieee80211_sub_if_data * sdata,unsigned long timeout)101 static void run_again(struct ieee80211_sub_if_data *sdata,
102 		      unsigned long timeout)
103 {
104 	sdata_assert_lock(sdata);
105 
106 	if (!timer_pending(&sdata->u.mgd.timer) ||
107 	    time_before(timeout, sdata->u.mgd.timer.expires))
108 		mod_timer(&sdata->u.mgd.timer, timeout);
109 }
110 
ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data * sdata)111 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
112 {
113 	if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
114 		return;
115 
116 	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
117 		return;
118 
119 	mod_timer(&sdata->u.mgd.bcn_mon_timer,
120 		  round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
121 }
122 
ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data * sdata)123 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
124 {
125 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
126 
127 	if (unlikely(!ifmgd->associated))
128 		return;
129 
130 	if (ifmgd->probe_send_count)
131 		ifmgd->probe_send_count = 0;
132 
133 	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
134 		return;
135 
136 	mod_timer(&ifmgd->conn_mon_timer,
137 		  round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
138 }
139 
ecw2cw(int ecw)140 static int ecw2cw(int ecw)
141 {
142 	return (1 << ecw) - 1;
143 }
144 
145 static u32
ieee80211_determine_chantype(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,struct ieee80211_channel * channel,u32 vht_cap_info,const struct ieee80211_ht_operation * ht_oper,const struct ieee80211_vht_operation * vht_oper,const struct ieee80211_he_operation * he_oper,const struct ieee80211_eht_operation * eht_oper,const struct ieee80211_s1g_oper_ie * s1g_oper,struct cfg80211_chan_def * chandef,bool tracking)146 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
147 			     struct ieee80211_supported_band *sband,
148 			     struct ieee80211_channel *channel,
149 			     u32 vht_cap_info,
150 			     const struct ieee80211_ht_operation *ht_oper,
151 			     const struct ieee80211_vht_operation *vht_oper,
152 			     const struct ieee80211_he_operation *he_oper,
153 			     const struct ieee80211_eht_operation *eht_oper,
154 			     const struct ieee80211_s1g_oper_ie *s1g_oper,
155 			     struct cfg80211_chan_def *chandef, bool tracking)
156 {
157 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
158 	struct cfg80211_chan_def vht_chandef;
159 	struct ieee80211_sta_ht_cap sta_ht_cap;
160 	u32 ht_cfreq, ret;
161 
162 	memset(chandef, 0, sizeof(struct cfg80211_chan_def));
163 	chandef->chan = channel;
164 	chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
165 	chandef->center_freq1 = channel->center_freq;
166 	chandef->freq1_offset = channel->freq_offset;
167 
168 	if (channel->band == NL80211_BAND_6GHZ) {
169 		if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper,
170 						    chandef)) {
171 			mlme_dbg(sdata,
172 				 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n");
173 			ret = IEEE80211_STA_DISABLE_HT |
174 			      IEEE80211_STA_DISABLE_VHT |
175 			      IEEE80211_STA_DISABLE_HE |
176 			      IEEE80211_STA_DISABLE_EHT;
177 		} else {
178 			ret = 0;
179 		}
180 		vht_chandef = *chandef;
181 		goto out;
182 	} else if (sband->band == NL80211_BAND_S1GHZ) {
183 		if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) {
184 			sdata_info(sdata,
185 				   "Missing S1G Operation Element? Trying operating == primary\n");
186 			chandef->width = ieee80211_s1g_channel_width(channel);
187 		}
188 
189 		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ |
190 		      IEEE80211_STA_DISABLE_VHT |
191 		      IEEE80211_STA_DISABLE_80P80MHZ |
192 		      IEEE80211_STA_DISABLE_160MHZ;
193 		goto out;
194 	}
195 
196 	memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
197 	ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
198 
199 	if (!ht_oper || !sta_ht_cap.ht_supported) {
200 		mlme_dbg(sdata, "HT operation missing / HT not supported\n");
201 		ret = IEEE80211_STA_DISABLE_HT |
202 		      IEEE80211_STA_DISABLE_VHT |
203 		      IEEE80211_STA_DISABLE_HE |
204 		      IEEE80211_STA_DISABLE_EHT;
205 		goto out;
206 	}
207 
208 	chandef->width = NL80211_CHAN_WIDTH_20;
209 
210 	ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
211 						  channel->band);
212 	/* check that channel matches the right operating channel */
213 	if (!tracking && channel->center_freq != ht_cfreq) {
214 		/*
215 		 * It's possible that some APs are confused here;
216 		 * Netgear WNDR3700 sometimes reports 4 higher than
217 		 * the actual channel in association responses, but
218 		 * since we look at probe response/beacon data here
219 		 * it should be OK.
220 		 */
221 		sdata_info(sdata,
222 			   "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
223 			   channel->center_freq, ht_cfreq,
224 			   ht_oper->primary_chan, channel->band);
225 		ret = IEEE80211_STA_DISABLE_HT |
226 		      IEEE80211_STA_DISABLE_VHT |
227 		      IEEE80211_STA_DISABLE_HE |
228 		      IEEE80211_STA_DISABLE_EHT;
229 		goto out;
230 	}
231 
232 	/* check 40 MHz support, if we have it */
233 	if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
234 		ieee80211_chandef_ht_oper(ht_oper, chandef);
235 	} else {
236 		mlme_dbg(sdata, "40 MHz not supported\n");
237 		/* 40 MHz (and 80 MHz) must be supported for VHT */
238 		ret = IEEE80211_STA_DISABLE_VHT;
239 		/* also mark 40 MHz disabled */
240 		ret |= IEEE80211_STA_DISABLE_40MHZ;
241 		goto out;
242 	}
243 
244 	if (!vht_oper || !sband->vht_cap.vht_supported) {
245 		mlme_dbg(sdata, "VHT operation missing / VHT not supported\n");
246 		ret = IEEE80211_STA_DISABLE_VHT;
247 		goto out;
248 	}
249 
250 	vht_chandef = *chandef;
251 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
252 	    (le32_to_cpu(he_oper->he_oper_params) &
253 	     IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
254 		struct ieee80211_vht_operation he_oper_vht_cap;
255 
256 		/*
257 		 * Set only first 3 bytes (other 2 aren't used in
258 		 * ieee80211_chandef_vht_oper() anyway)
259 		 */
260 		memcpy(&he_oper_vht_cap, he_oper->optional, 3);
261 		he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
262 
263 		if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
264 						&he_oper_vht_cap, ht_oper,
265 						&vht_chandef)) {
266 			if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
267 				sdata_info(sdata,
268 					   "HE AP VHT information is invalid, disabling HE\n");
269 			ret = IEEE80211_STA_DISABLE_HE | IEEE80211_STA_DISABLE_EHT;
270 			goto out;
271 		}
272 	} else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
273 					       vht_cap_info,
274 					       vht_oper, ht_oper,
275 					       &vht_chandef)) {
276 		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
277 			sdata_info(sdata,
278 				   "AP VHT information is invalid, disabling VHT\n");
279 		ret = IEEE80211_STA_DISABLE_VHT;
280 		goto out;
281 	}
282 
283 	if (!cfg80211_chandef_valid(&vht_chandef)) {
284 		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
285 			sdata_info(sdata,
286 				   "AP VHT information is invalid, disabling VHT\n");
287 		ret = IEEE80211_STA_DISABLE_VHT;
288 		goto out;
289 	}
290 
291 	if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
292 		ret = 0;
293 		goto out;
294 	}
295 
296 	if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
297 		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
298 			sdata_info(sdata,
299 				   "AP VHT information doesn't match HT, disabling VHT\n");
300 		ret = IEEE80211_STA_DISABLE_VHT;
301 		goto out;
302 	}
303 
304 	*chandef = vht_chandef;
305 
306 	ret = 0;
307 
308 out:
309 	/*
310 	 * When tracking the current AP, don't do any further checks if the
311 	 * new chandef is identical to the one we're currently using for the
312 	 * connection. This keeps us from playing ping-pong with regulatory,
313 	 * without it the following can happen (for example):
314 	 *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
315 	 *  - AP advertises regdom US
316 	 *  - CRDA loads regdom US with 80 MHz prohibited (old database)
317 	 *  - the code below detects an unsupported channel, downgrades, and
318 	 *    we disconnect from the AP in the caller
319 	 *  - disconnect causes CRDA to reload world regdomain and the game
320 	 *    starts anew.
321 	 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
322 	 *
323 	 * It seems possible that there are still scenarios with CSA or real
324 	 * bandwidth changes where a this could happen, but those cases are
325 	 * less common and wouldn't completely prevent using the AP.
326 	 */
327 	if (tracking &&
328 	    cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
329 		return ret;
330 
331 	/* don't print the message below for VHT mismatch if VHT is disabled */
332 	if (ret & IEEE80211_STA_DISABLE_VHT)
333 		vht_chandef = *chandef;
334 
335 	/*
336 	 * Ignore the DISABLED flag when we're already connected and only
337 	 * tracking the APs beacon for bandwidth changes - otherwise we
338 	 * might get disconnected here if we connect to an AP, update our
339 	 * regulatory information based on the AP's country IE and the
340 	 * information we have is wrong/outdated and disables the channel
341 	 * that we're actually using for the connection to the AP.
342 	 */
343 	while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
344 					tracking ? 0 :
345 						   IEEE80211_CHAN_DISABLED)) {
346 		if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
347 			ret = IEEE80211_STA_DISABLE_HT |
348 			      IEEE80211_STA_DISABLE_VHT |
349 			      IEEE80211_STA_DISABLE_HE |
350 			      IEEE80211_STA_DISABLE_EHT;
351 			break;
352 		}
353 
354 		ret |= ieee80211_chandef_downgrade(chandef);
355 	}
356 
357 	if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
358 						 IEEE80211_CHAN_NO_HE))
359 		ret |= IEEE80211_STA_DISABLE_HE | IEEE80211_STA_DISABLE_EHT;
360 
361 	if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
362 						  IEEE80211_CHAN_NO_EHT))
363 		ret |= IEEE80211_STA_DISABLE_EHT;
364 
365 	if (chandef->width != vht_chandef.width && !tracking)
366 		sdata_info(sdata,
367 			   "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
368 
369 	WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
370 	return ret;
371 }
372 
ieee80211_config_bw(struct ieee80211_sub_if_data * sdata,struct sta_info * sta,const struct ieee80211_ht_cap * ht_cap,const struct ieee80211_vht_cap * vht_cap,const struct ieee80211_ht_operation * ht_oper,const struct ieee80211_vht_operation * vht_oper,const struct ieee80211_he_operation * he_oper,const struct ieee80211_eht_operation * eht_oper,const struct ieee80211_s1g_oper_ie * s1g_oper,const u8 * bssid,u32 * changed)373 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
374 			       struct sta_info *sta,
375 			       const struct ieee80211_ht_cap *ht_cap,
376 			       const struct ieee80211_vht_cap *vht_cap,
377 			       const struct ieee80211_ht_operation *ht_oper,
378 			       const struct ieee80211_vht_operation *vht_oper,
379 			       const struct ieee80211_he_operation *he_oper,
380 			       const struct ieee80211_eht_operation *eht_oper,
381 			       const struct ieee80211_s1g_oper_ie *s1g_oper,
382 			       const u8 *bssid, u32 *changed)
383 {
384 	struct ieee80211_local *local = sdata->local;
385 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
386 	struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
387 	struct ieee80211_supported_band *sband =
388 		local->hw.wiphy->bands[chan->band];
389 	struct cfg80211_chan_def chandef;
390 	u16 ht_opmode;
391 	u32 flags;
392 	u32 vht_cap_info = 0;
393 	int ret;
394 
395 	/* if HT was/is disabled, don't track any bandwidth changes */
396 	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
397 		return 0;
398 
399 	/* don't check VHT if we associated as non-VHT station */
400 	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
401 		vht_oper = NULL;
402 
403 	/* don't check HE if we associated as non-HE station */
404 	if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
405 	    !ieee80211_get_he_iftype_cap(sband,
406 					 ieee80211_vif_type_p2p(&sdata->vif))) {
407 		he_oper = NULL;
408 		eht_oper = NULL;
409 	}
410 
411 	/* don't check EHT if we associated as non-EHT station */
412 	if (ifmgd->flags & IEEE80211_STA_DISABLE_EHT ||
413 	    !ieee80211_get_eht_iftype_cap(sband,
414 					 ieee80211_vif_type_p2p(&sdata->vif)))
415 		eht_oper = NULL;
416 
417 	if (WARN_ON_ONCE(!sta))
418 		return -EINVAL;
419 
420 	/*
421 	 * if bss configuration changed store the new one -
422 	 * this may be applicable even if channel is identical
423 	 */
424 	ht_opmode = le16_to_cpu(ht_oper->operation_mode);
425 	if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
426 		*changed |= BSS_CHANGED_HT;
427 		sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
428 	}
429 
430 	if (vht_cap)
431 		vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info);
432 
433 	/* calculate new channel (type) based on HT/VHT/HE operation IEs */
434 	flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info,
435 					     ht_oper, vht_oper,
436 					     he_oper, eht_oper,
437 					     s1g_oper, &chandef, true);
438 
439 	/*
440 	 * Downgrade the new channel if we associated with restricted
441 	 * capabilities. For example, if we associated as a 20 MHz STA
442 	 * to a 40 MHz AP (due to regulatory, capabilities or config
443 	 * reasons) then switching to a 40 MHz channel now won't do us
444 	 * any good -- we couldn't use it with the AP.
445 	 */
446 	if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
447 	    chandef.width == NL80211_CHAN_WIDTH_80P80)
448 		flags |= ieee80211_chandef_downgrade(&chandef);
449 	if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
450 	    chandef.width == NL80211_CHAN_WIDTH_160)
451 		flags |= ieee80211_chandef_downgrade(&chandef);
452 	if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
453 	    chandef.width > NL80211_CHAN_WIDTH_20)
454 		flags |= ieee80211_chandef_downgrade(&chandef);
455 
456 	if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
457 		return 0;
458 
459 	sdata_info(sdata,
460 		   "AP %pM changed bandwidth, new config is %d.%03d MHz, "
461 		   "width %d (%d.%03d/%d MHz)\n",
462 		   ifmgd->bssid, chandef.chan->center_freq,
463 		   chandef.chan->freq_offset, chandef.width,
464 		   chandef.center_freq1, chandef.freq1_offset,
465 		   chandef.center_freq2);
466 
467 	if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
468 				      IEEE80211_STA_DISABLE_VHT |
469 				      IEEE80211_STA_DISABLE_HE |
470 				      IEEE80211_STA_DISABLE_EHT |
471 				      IEEE80211_STA_DISABLE_40MHZ |
472 				      IEEE80211_STA_DISABLE_80P80MHZ |
473 				      IEEE80211_STA_DISABLE_160MHZ |
474 				      IEEE80211_STA_DISABLE_320MHZ)) ||
475 	    !cfg80211_chandef_valid(&chandef)) {
476 		sdata_info(sdata,
477 			   "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n",
478 			   ifmgd->bssid, flags, ifmgd->flags);
479 		return -EINVAL;
480 	}
481 
482 	ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
483 
484 	if (ret) {
485 		sdata_info(sdata,
486 			   "AP %pM changed bandwidth to incompatible one - disconnect\n",
487 			   ifmgd->bssid);
488 		return ret;
489 	}
490 
491 	return 0;
492 }
493 
494 /* frame sending functions */
495 
ieee80211_add_ht_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,u8 ap_ht_param,struct ieee80211_supported_band * sband,struct ieee80211_channel * channel,enum ieee80211_smps_mode smps)496 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
497 				struct sk_buff *skb, u8 ap_ht_param,
498 				struct ieee80211_supported_band *sband,
499 				struct ieee80211_channel *channel,
500 				enum ieee80211_smps_mode smps)
501 {
502 	u8 *pos;
503 	u32 flags = channel->flags;
504 	u16 cap;
505 	struct ieee80211_sta_ht_cap ht_cap;
506 
507 	BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
508 
509 	memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
510 	ieee80211_apply_htcap_overrides(sdata, &ht_cap);
511 
512 	/* determine capability flags */
513 	cap = ht_cap.cap;
514 
515 	switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
516 	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
517 		if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
518 			cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
519 			cap &= ~IEEE80211_HT_CAP_SGI_40;
520 		}
521 		break;
522 	case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
523 		if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
524 			cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
525 			cap &= ~IEEE80211_HT_CAP_SGI_40;
526 		}
527 		break;
528 	}
529 
530 	/*
531 	 * If 40 MHz was disabled associate as though we weren't
532 	 * capable of 40 MHz -- some broken APs will never fall
533 	 * back to trying to transmit in 20 MHz.
534 	 */
535 	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
536 		cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
537 		cap &= ~IEEE80211_HT_CAP_SGI_40;
538 	}
539 
540 	/* set SM PS mode properly */
541 	cap &= ~IEEE80211_HT_CAP_SM_PS;
542 	switch (smps) {
543 	case IEEE80211_SMPS_AUTOMATIC:
544 	case IEEE80211_SMPS_NUM_MODES:
545 		WARN_ON(1);
546 		fallthrough;
547 	case IEEE80211_SMPS_OFF:
548 		cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
549 			IEEE80211_HT_CAP_SM_PS_SHIFT;
550 		break;
551 	case IEEE80211_SMPS_STATIC:
552 		cap |= WLAN_HT_CAP_SM_PS_STATIC <<
553 			IEEE80211_HT_CAP_SM_PS_SHIFT;
554 		break;
555 	case IEEE80211_SMPS_DYNAMIC:
556 		cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
557 			IEEE80211_HT_CAP_SM_PS_SHIFT;
558 		break;
559 	}
560 
561 	/* reserve and fill IE */
562 	pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
563 	ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
564 }
565 
566 /* This function determines vht capability flags for the association
567  * and builds the IE.
568  * Note - the function may set the owner of the MU-MIMO capability
569  */
ieee80211_add_vht_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,struct ieee80211_supported_band * sband,struct ieee80211_vht_cap * ap_vht_cap)570 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
571 				 struct sk_buff *skb,
572 				 struct ieee80211_supported_band *sband,
573 				 struct ieee80211_vht_cap *ap_vht_cap)
574 {
575 	struct ieee80211_local *local = sdata->local;
576 	u8 *pos;
577 	u32 cap;
578 	struct ieee80211_sta_vht_cap vht_cap;
579 	u32 mask, ap_bf_sts, our_bf_sts;
580 
581 	BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
582 
583 	memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
584 	ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
585 
586 	/* determine capability flags */
587 	cap = vht_cap.cap;
588 
589 	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
590 		u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
591 
592 		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
593 		if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
594 		    bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
595 			cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
596 	}
597 
598 	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
599 		cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
600 		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
601 	}
602 
603 	/*
604 	 * Some APs apparently get confused if our capabilities are better
605 	 * than theirs, so restrict what we advertise in the assoc request.
606 	 */
607 	if (!(ap_vht_cap->vht_cap_info &
608 			cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
609 		cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
610 			 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
611 	else if (!(ap_vht_cap->vht_cap_info &
612 			cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
613 		cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
614 
615 	/*
616 	 * If some other vif is using the MU-MIMO capability we cannot associate
617 	 * using MU-MIMO - this will lead to contradictions in the group-id
618 	 * mechanism.
619 	 * Ownership is defined since association request, in order to avoid
620 	 * simultaneous associations with MU-MIMO.
621 	 */
622 	if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
623 		bool disable_mu_mimo = false;
624 		struct ieee80211_sub_if_data *other;
625 
626 		list_for_each_entry_rcu(other, &local->interfaces, list) {
627 			if (other->vif.bss_conf.mu_mimo_owner) {
628 				disable_mu_mimo = true;
629 				break;
630 			}
631 		}
632 		if (disable_mu_mimo)
633 			cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
634 		else
635 			sdata->vif.bss_conf.mu_mimo_owner = true;
636 	}
637 
638 	mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
639 
640 	ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
641 	our_bf_sts = cap & mask;
642 
643 	if (ap_bf_sts < our_bf_sts) {
644 		cap &= ~mask;
645 		cap |= ap_bf_sts;
646 	}
647 
648 	/* reserve and fill IE */
649 	pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
650 	ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
651 }
652 
653 /* This function determines HE capability flags for the association
654  * and builds the IE.
655  */
ieee80211_add_he_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,struct ieee80211_supported_band * sband)656 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
657 				struct sk_buff *skb,
658 				struct ieee80211_supported_band *sband)
659 {
660 	u8 *pos, *pre_he_pos;
661 	const struct ieee80211_sta_he_cap *he_cap = NULL;
662 	struct ieee80211_chanctx_conf *chanctx_conf;
663 	u8 he_cap_size;
664 	bool reg_cap = false;
665 
666 	rcu_read_lock();
667 	chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
668 	if (!WARN_ON_ONCE(!chanctx_conf))
669 		reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy,
670 						  &chanctx_conf->def,
671 						  IEEE80211_CHAN_NO_HE);
672 
673 	rcu_read_unlock();
674 
675 	he_cap = ieee80211_get_he_iftype_cap(sband,
676 					     ieee80211_vif_type_p2p(&sdata->vif));
677 	if (!he_cap || !chanctx_conf || !reg_cap)
678 		return;
679 
680 	/* get a max size estimate */
681 	he_cap_size =
682 		2 + 1 + sizeof(he_cap->he_cap_elem) +
683 		ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
684 		ieee80211_he_ppe_size(he_cap->ppe_thres[0],
685 				      he_cap->he_cap_elem.phy_cap_info);
686 	pos = skb_put(skb, he_cap_size);
687 	pre_he_pos = pos;
688 	pos = ieee80211_ie_build_he_cap(sdata->u.mgd.flags,
689 					pos, he_cap, pos + he_cap_size);
690 	/* trim excess if any */
691 	skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos));
692 
693 	ieee80211_ie_build_he_6ghz_cap(sdata, skb);
694 }
695 
ieee80211_add_eht_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,struct ieee80211_supported_band * sband)696 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata,
697 				 struct sk_buff *skb,
698 				 struct ieee80211_supported_band *sband)
699 {
700 	u8 *pos;
701 	const struct ieee80211_sta_he_cap *he_cap;
702 	const struct ieee80211_sta_eht_cap *eht_cap;
703 	struct ieee80211_chanctx_conf *chanctx_conf;
704 	u8 eht_cap_size;
705 	bool reg_cap = false;
706 
707 	rcu_read_lock();
708 	chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
709 	if (!WARN_ON_ONCE(!chanctx_conf))
710 		reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy,
711 						  &chanctx_conf->def,
712 						  IEEE80211_CHAN_NO_HE |
713 						  IEEE80211_CHAN_NO_EHT);
714 	rcu_read_unlock();
715 
716 	he_cap = ieee80211_get_he_iftype_cap(sband,
717 					     ieee80211_vif_type_p2p(&sdata->vif));
718 	eht_cap = ieee80211_get_eht_iftype_cap(sband,
719 					       ieee80211_vif_type_p2p(&sdata->vif));
720 
721 	/*
722 	 * EHT capabilities element is only added if the HE capabilities element
723 	 * was added so assume that 'he_cap' is valid and don't check it.
724 	 */
725 	if (WARN_ON(!he_cap || !eht_cap || !reg_cap))
726 		return;
727 
728 	eht_cap_size =
729 		2 + 1 + sizeof(eht_cap->eht_cap_elem) +
730 		ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
731 					   &eht_cap->eht_cap_elem) +
732 		ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
733 				       eht_cap->eht_cap_elem.phy_cap_info);
734 	pos = skb_put(skb, eht_cap_size);
735 	ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size);
736 }
737 
ieee80211_send_assoc(struct ieee80211_sub_if_data * sdata)738 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
739 {
740 	struct ieee80211_local *local = sdata->local;
741 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
742 	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
743 	struct sk_buff *skb;
744 	struct ieee80211_mgmt *mgmt;
745 	u8 *pos, qos_info, *ie_start;
746 	size_t offset = 0, noffset;
747 	int i, count, rates_len, supp_rates_len, shift;
748 	u16 capab;
749 	struct ieee80211_supported_band *sband;
750 	struct ieee80211_chanctx_conf *chanctx_conf;
751 	struct ieee80211_channel *chan;
752 	u32 rates = 0;
753 	__le16 listen_int;
754 	struct element *ext_capa = NULL;
755 	enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
756 	const struct ieee80211_sband_iftype_data *iftd;
757 	struct ieee80211_prep_tx_info info = {};
758 	int ret;
759 
760 	/* we know it's writable, cast away the const */
761 	if (assoc_data->ie_len)
762 		ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
763 						      assoc_data->ie,
764 						      assoc_data->ie_len);
765 
766 	sdata_assert_lock(sdata);
767 
768 	rcu_read_lock();
769 	chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
770 	if (WARN_ON(!chanctx_conf)) {
771 		rcu_read_unlock();
772 		return -EINVAL;
773 	}
774 	chan = chanctx_conf->def.chan;
775 	rcu_read_unlock();
776 	sband = local->hw.wiphy->bands[chan->band];
777 	shift = ieee80211_vif_get_shift(&sdata->vif);
778 
779 	if (assoc_data->supp_rates_len) {
780 		/*
781 		 * Get all rates supported by the device and the AP as
782 		 * some APs don't like getting a superset of their rates
783 		 * in the association request (e.g. D-Link DAP 1353 in
784 		 * b-only mode)...
785 		 */
786 		rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
787 						     assoc_data->supp_rates,
788 						     assoc_data->supp_rates_len,
789 						     &rates);
790 	} else {
791 		/*
792 		 * In case AP not provide any supported rates information
793 		 * before association, we send information element(s) with
794 		 * all rates that we support.
795 		 */
796 		rates_len = 0;
797 		for (i = 0; i < sband->n_bitrates; i++) {
798 			rates |= BIT(i);
799 			rates_len++;
800 		}
801 	}
802 
803 	iftd = ieee80211_get_sband_iftype_data(sband, iftype);
804 
805 	skb = alloc_skb(local->hw.extra_tx_headroom +
806 			sizeof(*mgmt) + /* bit too much but doesn't matter */
807 			2 + assoc_data->ssid_len + /* SSID */
808 			4 + rates_len + /* (extended) rates */
809 			4 + /* power capability */
810 			2 + 2 * sband->n_channels + /* supported channels */
811 			2 + sizeof(struct ieee80211_ht_cap) + /* HT */
812 			2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
813 			2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
814 				sizeof(struct ieee80211_he_mcs_nss_supp) +
815 				IEEE80211_HE_PPE_THRES_MAX_LEN +
816 			2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
817 			assoc_data->ie_len + /* extra IEs */
818 			(assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
819 			9 + /* WMM */
820 			(iftd ? iftd->vendor_elems.len : 0),
821 			GFP_KERNEL);
822 	if (!skb)
823 		return -ENOMEM;
824 
825 	skb_reserve(skb, local->hw.extra_tx_headroom);
826 
827 	capab = WLAN_CAPABILITY_ESS;
828 
829 	if (sband->band == NL80211_BAND_2GHZ) {
830 		capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
831 		capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
832 	}
833 
834 	if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
835 		capab |= WLAN_CAPABILITY_PRIVACY;
836 
837 	if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
838 	    ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
839 		capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
840 
841 	if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
842 		capab |= WLAN_CAPABILITY_RADIO_MEASURE;
843 
844 	mgmt = skb_put_zero(skb, 24);
845 	memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
846 	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
847 	memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
848 
849 	listen_int = cpu_to_le16(sband->band == NL80211_BAND_S1GHZ ?
850 			ieee80211_encode_usf(local->hw.conf.listen_interval) :
851 			local->hw.conf.listen_interval);
852 	if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
853 		skb_put(skb, 10);
854 		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
855 						  IEEE80211_STYPE_REASSOC_REQ);
856 		mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
857 		mgmt->u.reassoc_req.listen_interval = listen_int;
858 		memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
859 		       ETH_ALEN);
860 		info.subtype = IEEE80211_STYPE_REASSOC_REQ;
861 	} else {
862 		skb_put(skb, 4);
863 		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
864 						  IEEE80211_STYPE_ASSOC_REQ);
865 		mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
866 		mgmt->u.assoc_req.listen_interval = listen_int;
867 		info.subtype = IEEE80211_STYPE_ASSOC_REQ;
868 	}
869 
870 	/* SSID */
871 	pos = skb_put(skb, 2 + assoc_data->ssid_len);
872 	ie_start = pos;
873 	*pos++ = WLAN_EID_SSID;
874 	*pos++ = assoc_data->ssid_len;
875 	memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
876 
877 	if (sband->band == NL80211_BAND_S1GHZ)
878 		goto skip_rates;
879 
880 	/* add all rates which were marked to be used above */
881 	supp_rates_len = rates_len;
882 	if (supp_rates_len > 8)
883 		supp_rates_len = 8;
884 
885 	pos = skb_put(skb, supp_rates_len + 2);
886 	*pos++ = WLAN_EID_SUPP_RATES;
887 	*pos++ = supp_rates_len;
888 
889 	count = 0;
890 	for (i = 0; i < sband->n_bitrates; i++) {
891 		if (BIT(i) & rates) {
892 			int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
893 						5 * (1 << shift));
894 			*pos++ = (u8) rate;
895 			if (++count == 8)
896 				break;
897 		}
898 	}
899 
900 	if (rates_len > count) {
901 		pos = skb_put(skb, rates_len - count + 2);
902 		*pos++ = WLAN_EID_EXT_SUPP_RATES;
903 		*pos++ = rates_len - count;
904 
905 		for (i++; i < sband->n_bitrates; i++) {
906 			if (BIT(i) & rates) {
907 				int rate;
908 				rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
909 						    5 * (1 << shift));
910 				*pos++ = (u8) rate;
911 			}
912 		}
913 	}
914 
915 skip_rates:
916 	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
917 	    capab & WLAN_CAPABILITY_RADIO_MEASURE) {
918 		pos = skb_put(skb, 4);
919 		*pos++ = WLAN_EID_PWR_CAPABILITY;
920 		*pos++ = 2;
921 		*pos++ = 0; /* min tx power */
922 		 /* max tx power */
923 		*pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
924 	}
925 
926 	/*
927 	 * Per spec, we shouldn't include the list of channels if we advertise
928 	 * support for extended channel switching, but we've always done that;
929 	 * (for now?) apply this restriction only on the (new) 6 GHz band.
930 	 */
931 	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
932 	    (sband->band != NL80211_BAND_6GHZ ||
933 	     !ext_capa || ext_capa->datalen < 1 ||
934 	     !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
935 		/* TODO: get this in reg domain format */
936 		pos = skb_put(skb, 2 * sband->n_channels + 2);
937 		*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
938 		*pos++ = 2 * sband->n_channels;
939 		for (i = 0; i < sband->n_channels; i++) {
940 			*pos++ = ieee80211_frequency_to_channel(
941 					sband->channels[i].center_freq);
942 			*pos++ = 1; /* one channel in the subband*/
943 		}
944 	}
945 
946 	/* Set MBSSID support for HE AP if needed */
947 	if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
948 	    !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len &&
949 	    ext_capa && ext_capa->datalen >= 3)
950 		ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
951 
952 	/* if present, add any custom IEs that go before HT */
953 	if (assoc_data->ie_len) {
954 		static const u8 before_ht[] = {
955 			WLAN_EID_SSID,
956 			WLAN_EID_SUPP_RATES,
957 			WLAN_EID_EXT_SUPP_RATES,
958 			WLAN_EID_PWR_CAPABILITY,
959 			WLAN_EID_SUPPORTED_CHANNELS,
960 			WLAN_EID_RSN,
961 			WLAN_EID_QOS_CAPA,
962 			WLAN_EID_RRM_ENABLED_CAPABILITIES,
963 			WLAN_EID_MOBILITY_DOMAIN,
964 			WLAN_EID_FAST_BSS_TRANSITION,	/* reassoc only */
965 			WLAN_EID_RIC_DATA,		/* reassoc only */
966 			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
967 		};
968 		static const u8 after_ric[] = {
969 			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
970 			WLAN_EID_HT_CAPABILITY,
971 			WLAN_EID_BSS_COEX_2040,
972 			/* luckily this is almost always there */
973 			WLAN_EID_EXT_CAPABILITY,
974 			WLAN_EID_QOS_TRAFFIC_CAPA,
975 			WLAN_EID_TIM_BCAST_REQ,
976 			WLAN_EID_INTERWORKING,
977 			/* 60 GHz (Multi-band, DMG, MMS) can't happen */
978 			WLAN_EID_VHT_CAPABILITY,
979 			WLAN_EID_OPMODE_NOTIF,
980 		};
981 
982 		noffset = ieee80211_ie_split_ric(assoc_data->ie,
983 						 assoc_data->ie_len,
984 						 before_ht,
985 						 ARRAY_SIZE(before_ht),
986 						 after_ric,
987 						 ARRAY_SIZE(after_ric),
988 						 offset);
989 		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
990 		offset = noffset;
991 	}
992 
993 	if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
994 			 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
995 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
996 
997 	if (sband->band != NL80211_BAND_6GHZ &&
998 	    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
999 		ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
1000 				    sband, chan, sdata->smps_mode);
1001 
1002 	/* if present, add any custom IEs that go before VHT */
1003 	if (assoc_data->ie_len) {
1004 		static const u8 before_vht[] = {
1005 			/*
1006 			 * no need to list the ones split off before HT
1007 			 * or generated here
1008 			 */
1009 			WLAN_EID_BSS_COEX_2040,
1010 			WLAN_EID_EXT_CAPABILITY,
1011 			WLAN_EID_QOS_TRAFFIC_CAPA,
1012 			WLAN_EID_TIM_BCAST_REQ,
1013 			WLAN_EID_INTERWORKING,
1014 			/* 60 GHz (Multi-band, DMG, MMS) can't happen */
1015 		};
1016 
1017 		/* RIC already taken above, so no need to handle here anymore */
1018 		noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
1019 					     before_vht, ARRAY_SIZE(before_vht),
1020 					     offset);
1021 		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1022 		offset = noffset;
1023 	}
1024 
1025 	/* if present, add any custom IEs that go before HE */
1026 	if (assoc_data->ie_len) {
1027 		static const u8 before_he[] = {
1028 			/*
1029 			 * no need to list the ones split off before VHT
1030 			 * or generated here
1031 			 */
1032 			WLAN_EID_OPMODE_NOTIF,
1033 			WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
1034 			/* 11ai elements */
1035 			WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
1036 			WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
1037 			WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
1038 			WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
1039 			WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
1040 			/* TODO: add 11ah/11aj/11ak elements */
1041 		};
1042 
1043 		/* RIC already taken above, so no need to handle here anymore */
1044 		noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
1045 					     before_he, ARRAY_SIZE(before_he),
1046 					     offset);
1047 		pos = skb_put(skb, noffset - offset);
1048 		memcpy(pos, assoc_data->ie + offset, noffset - offset);
1049 		offset = noffset;
1050 	}
1051 
1052 	if (sband->band != NL80211_BAND_6GHZ &&
1053 	    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
1054 		ieee80211_add_vht_ie(sdata, skb, sband,
1055 				     &assoc_data->ap_vht_cap);
1056 
1057 	/*
1058 	 * If AP doesn't support HT, mark HE and EHT as disabled.
1059 	 * If on the 5GHz band, make sure it supports VHT.
1060 	 */
1061 	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
1062 	    (sband->band == NL80211_BAND_5GHZ &&
1063 	     ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
1064 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE |
1065 			        IEEE80211_STA_DISABLE_EHT;
1066 
1067 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
1068 		ieee80211_add_he_ie(sdata, skb, sband);
1069 
1070 		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_EHT))
1071 			ieee80211_add_eht_ie(sdata, skb, sband);
1072 	}
1073 
1074 	/* if present, add any custom non-vendor IEs that go after HE */
1075 	if (assoc_data->ie_len) {
1076 		noffset = ieee80211_ie_split_vendor(assoc_data->ie,
1077 						    assoc_data->ie_len,
1078 						    offset);
1079 		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1080 		offset = noffset;
1081 	}
1082 
1083 	if (assoc_data->wmm) {
1084 		if (assoc_data->uapsd) {
1085 			qos_info = ifmgd->uapsd_queues;
1086 			qos_info |= (ifmgd->uapsd_max_sp_len <<
1087 				     IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
1088 		} else {
1089 			qos_info = 0;
1090 		}
1091 
1092 		pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
1093 	}
1094 
1095 	if (sband->band == NL80211_BAND_S1GHZ) {
1096 		ieee80211_add_aid_request_ie(sdata, skb);
1097 		ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb);
1098 	}
1099 
1100 	if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len)
1101 		skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len);
1102 
1103 	/* add any remaining custom (i.e. vendor specific here) IEs */
1104 	if (assoc_data->ie_len) {
1105 		noffset = assoc_data->ie_len;
1106 		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1107 	}
1108 
1109 	if (assoc_data->fils_kek_len) {
1110 		ret = fils_encrypt_assoc_req(skb, assoc_data);
1111 		if (ret < 0) {
1112 			dev_kfree_skb(skb);
1113 			return ret;
1114 		}
1115 	}
1116 
1117 	pos = skb_tail_pointer(skb);
1118 	kfree(ifmgd->assoc_req_ies);
1119 	ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1120 	if (!ifmgd->assoc_req_ies) {
1121 		dev_kfree_skb(skb);
1122 		return -ENOMEM;
1123 	}
1124 
1125 	ifmgd->assoc_req_ies_len = pos - ie_start;
1126 
1127 	drv_mgd_prepare_tx(local, sdata, &info);
1128 
1129 	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1130 	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1131 		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1132 						IEEE80211_TX_INTFL_MLME_CONN_TX;
1133 	ieee80211_tx_skb(sdata, skb);
1134 
1135 	return 0;
1136 }
1137 
ieee80211_send_pspoll(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1138 void ieee80211_send_pspoll(struct ieee80211_local *local,
1139 			   struct ieee80211_sub_if_data *sdata)
1140 {
1141 	struct ieee80211_pspoll *pspoll;
1142 	struct sk_buff *skb;
1143 
1144 	skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1145 	if (!skb)
1146 		return;
1147 
1148 	pspoll = (struct ieee80211_pspoll *) skb->data;
1149 	pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1150 
1151 	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1152 	ieee80211_tx_skb(sdata, skb);
1153 }
1154 
ieee80211_send_nullfunc(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,bool powersave)1155 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1156 			     struct ieee80211_sub_if_data *sdata,
1157 			     bool powersave)
1158 {
1159 	struct sk_buff *skb;
1160 	struct ieee80211_hdr_3addr *nullfunc;
1161 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1162 
1163 	skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1164 		!ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1165 	if (!skb)
1166 		return;
1167 
1168 	nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1169 	if (powersave)
1170 		nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1171 
1172 	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1173 					IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1174 
1175 	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1176 		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1177 
1178 	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1179 		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1180 
1181 	ieee80211_tx_skb(sdata, skb);
1182 }
1183 
ieee80211_send_4addr_nullfunc(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1184 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1185 				   struct ieee80211_sub_if_data *sdata)
1186 {
1187 	struct sk_buff *skb;
1188 	struct ieee80211_hdr *nullfunc;
1189 	__le16 fc;
1190 
1191 	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1192 		return;
1193 
1194 	skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1195 	if (!skb)
1196 		return;
1197 
1198 	skb_reserve(skb, local->hw.extra_tx_headroom);
1199 
1200 	nullfunc = skb_put_zero(skb, 30);
1201 	fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1202 			 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1203 	nullfunc->frame_control = fc;
1204 	memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1205 	memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1206 	memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1207 	memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1208 
1209 	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1210 	ieee80211_tx_skb(sdata, skb);
1211 }
1212 
1213 /* spectrum management related things */
ieee80211_chswitch_work(struct work_struct * work)1214 static void ieee80211_chswitch_work(struct work_struct *work)
1215 {
1216 	struct ieee80211_sub_if_data *sdata =
1217 		container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1218 	struct ieee80211_local *local = sdata->local;
1219 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1220 	int ret;
1221 
1222 	if (!ieee80211_sdata_running(sdata))
1223 		return;
1224 
1225 	sdata_lock(sdata);
1226 	mutex_lock(&local->mtx);
1227 	mutex_lock(&local->chanctx_mtx);
1228 
1229 	if (!ifmgd->associated)
1230 		goto out;
1231 
1232 	if (!sdata->vif.bss_conf.csa_active)
1233 		goto out;
1234 
1235 	/*
1236 	 * using reservation isn't immediate as it may be deferred until later
1237 	 * with multi-vif. once reservation is complete it will re-schedule the
1238 	 * work with no reserved_chanctx so verify chandef to check if it
1239 	 * completed successfully
1240 	 */
1241 
1242 	if (sdata->reserved_chanctx) {
1243 		/*
1244 		 * with multi-vif csa driver may call ieee80211_csa_finish()
1245 		 * many times while waiting for other interfaces to use their
1246 		 * reservations
1247 		 */
1248 		if (sdata->reserved_ready)
1249 			goto out;
1250 
1251 		ret = ieee80211_vif_use_reserved_context(sdata);
1252 		if (ret) {
1253 			sdata_info(sdata,
1254 				   "failed to use reserved channel context, disconnecting (err=%d)\n",
1255 				   ret);
1256 			ieee80211_queue_work(&sdata->local->hw,
1257 					     &ifmgd->csa_connection_drop_work);
1258 			goto out;
1259 		}
1260 
1261 		goto out;
1262 	}
1263 
1264 	if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1265 					&sdata->csa_chandef)) {
1266 		sdata_info(sdata,
1267 			   "failed to finalize channel switch, disconnecting\n");
1268 		ieee80211_queue_work(&sdata->local->hw,
1269 				     &ifmgd->csa_connection_drop_work);
1270 		goto out;
1271 	}
1272 
1273 	ifmgd->csa_waiting_bcn = true;
1274 
1275 	ieee80211_sta_reset_beacon_monitor(sdata);
1276 	ieee80211_sta_reset_conn_monitor(sdata);
1277 
1278 out:
1279 	mutex_unlock(&local->chanctx_mtx);
1280 	mutex_unlock(&local->mtx);
1281 	sdata_unlock(sdata);
1282 }
1283 
ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data * sdata)1284 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1285 {
1286 	struct ieee80211_local *local = sdata->local;
1287 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1288 	int ret;
1289 
1290 	sdata_assert_lock(sdata);
1291 
1292 	WARN_ON(!sdata->vif.bss_conf.csa_active);
1293 
1294 	if (sdata->csa_block_tx) {
1295 		ieee80211_wake_vif_queues(local, sdata,
1296 					  IEEE80211_QUEUE_STOP_REASON_CSA);
1297 		sdata->csa_block_tx = false;
1298 	}
1299 
1300 	sdata->vif.bss_conf.csa_active = false;
1301 	ifmgd->csa_waiting_bcn = false;
1302 	/*
1303 	 * If the CSA IE is still present on the beacon after the switch,
1304 	 * we need to consider it as a new CSA (possibly to self).
1305 	 */
1306 	ifmgd->beacon_crc_valid = false;
1307 
1308 	ret = drv_post_channel_switch(sdata);
1309 	if (ret) {
1310 		sdata_info(sdata,
1311 			   "driver post channel switch failed, disconnecting\n");
1312 		ieee80211_queue_work(&local->hw,
1313 				     &ifmgd->csa_connection_drop_work);
1314 		return;
1315 	}
1316 
1317 	cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef, 0);
1318 }
1319 
ieee80211_chswitch_done(struct ieee80211_vif * vif,bool success)1320 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1321 {
1322 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1323 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1324 
1325 	trace_api_chswitch_done(sdata, success);
1326 	if (!success) {
1327 		sdata_info(sdata,
1328 			   "driver channel switch failed, disconnecting\n");
1329 		ieee80211_queue_work(&sdata->local->hw,
1330 				     &ifmgd->csa_connection_drop_work);
1331 	} else {
1332 		ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1333 	}
1334 }
1335 EXPORT_SYMBOL(ieee80211_chswitch_done);
1336 
ieee80211_chswitch_timer(struct timer_list * t)1337 static void ieee80211_chswitch_timer(struct timer_list *t)
1338 {
1339 	struct ieee80211_sub_if_data *sdata =
1340 		from_timer(sdata, t, u.mgd.chswitch_timer);
1341 
1342 	ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1343 }
1344 
1345 static void
ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data * sdata)1346 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1347 {
1348 	struct ieee80211_local *local = sdata->local;
1349 
1350 	if (!local->ops->abort_channel_switch)
1351 		return;
1352 
1353 	mutex_lock(&local->mtx);
1354 
1355 	mutex_lock(&local->chanctx_mtx);
1356 	ieee80211_vif_unreserve_chanctx(sdata);
1357 	mutex_unlock(&local->chanctx_mtx);
1358 
1359 	if (sdata->csa_block_tx)
1360 		ieee80211_wake_vif_queues(local, sdata,
1361 					  IEEE80211_QUEUE_STOP_REASON_CSA);
1362 
1363 	sdata->csa_block_tx = false;
1364 	sdata->vif.bss_conf.csa_active = false;
1365 
1366 	mutex_unlock(&local->mtx);
1367 
1368 	drv_abort_channel_switch(sdata);
1369 }
1370 
1371 static void
ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data * sdata,u64 timestamp,u32 device_timestamp,struct ieee802_11_elems * elems,bool beacon)1372 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1373 				 u64 timestamp, u32 device_timestamp,
1374 				 struct ieee802_11_elems *elems,
1375 				 bool beacon)
1376 {
1377 	struct ieee80211_local *local = sdata->local;
1378 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1379 	struct cfg80211_bss *cbss = ifmgd->assoc_bss;
1380 	struct ieee80211_chanctx_conf *conf;
1381 	struct ieee80211_chanctx *chanctx;
1382 	enum nl80211_band current_band;
1383 	struct ieee80211_csa_ie csa_ie;
1384 	struct ieee80211_channel_switch ch_switch;
1385 	struct ieee80211_bss *bss;
1386 	int res;
1387 
1388 	sdata_assert_lock(sdata);
1389 
1390 	if (!cbss)
1391 		return;
1392 
1393 	if (local->scanning)
1394 		return;
1395 
1396 	current_band = cbss->channel->band;
1397 	bss = (void *)cbss->priv;
1398 	res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1399 					   bss->vht_cap_info,
1400 					   ifmgd->flags,
1401 					   ifmgd->bssid, &csa_ie);
1402 
1403 	if (!res) {
1404 		ch_switch.timestamp = timestamp;
1405 		ch_switch.device_timestamp = device_timestamp;
1406 		ch_switch.block_tx = csa_ie.mode;
1407 		ch_switch.chandef = csa_ie.chandef;
1408 		ch_switch.count = csa_ie.count;
1409 		ch_switch.delay = csa_ie.max_switch_time;
1410 	}
1411 
1412 	if (res < 0)
1413 		goto lock_and_drop_connection;
1414 
1415 	if (beacon && sdata->vif.bss_conf.csa_active && !ifmgd->csa_waiting_bcn) {
1416 		if (res)
1417 			ieee80211_sta_abort_chanswitch(sdata);
1418 		else
1419 			drv_channel_switch_rx_beacon(sdata, &ch_switch);
1420 		return;
1421 	} else if (sdata->vif.bss_conf.csa_active || res) {
1422 		/* disregard subsequent announcements if already processing */
1423 		return;
1424 	}
1425 
1426 	if (sdata->vif.bss_conf.chandef.chan->band !=
1427 	    csa_ie.chandef.chan->band) {
1428 		sdata_info(sdata,
1429 			   "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1430 			   ifmgd->bssid,
1431 			   csa_ie.chandef.chan->center_freq,
1432 			   csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1433 			   csa_ie.chandef.center_freq2);
1434 		goto lock_and_drop_connection;
1435 	}
1436 
1437 	if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1438 				     IEEE80211_CHAN_DISABLED)) {
1439 		sdata_info(sdata,
1440 			   "AP %pM switches to unsupported channel "
1441 			   "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), "
1442 			   "disconnecting\n",
1443 			   ifmgd->bssid,
1444 			   csa_ie.chandef.chan->center_freq,
1445 			   csa_ie.chandef.chan->freq_offset,
1446 			   csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1447 			   csa_ie.chandef.freq1_offset,
1448 			   csa_ie.chandef.center_freq2);
1449 		goto lock_and_drop_connection;
1450 	}
1451 
1452 	if (cfg80211_chandef_identical(&csa_ie.chandef,
1453 				       &sdata->vif.bss_conf.chandef) &&
1454 	    (!csa_ie.mode || !beacon)) {
1455 		if (ifmgd->csa_ignored_same_chan)
1456 			return;
1457 		sdata_info(sdata,
1458 			   "AP %pM tries to chanswitch to same channel, ignore\n",
1459 			   ifmgd->bssid);
1460 		ifmgd->csa_ignored_same_chan = true;
1461 		return;
1462 	}
1463 
1464 	/*
1465 	 * Drop all TDLS peers - either we disconnect or move to a different
1466 	 * channel from this point on. There's no telling what our peer will do.
1467 	 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1468 	 * have an incompatible wider chandef.
1469 	 */
1470 	ieee80211_teardown_tdls_peers(sdata);
1471 
1472 	mutex_lock(&local->mtx);
1473 	mutex_lock(&local->chanctx_mtx);
1474 	conf = rcu_dereference_protected(sdata->vif.bss_conf.chanctx_conf,
1475 					 lockdep_is_held(&local->chanctx_mtx));
1476 	if (!conf) {
1477 		sdata_info(sdata,
1478 			   "no channel context assigned to vif?, disconnecting\n");
1479 		goto drop_connection;
1480 	}
1481 
1482 	chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1483 
1484 	if (local->use_chanctx &&
1485 	    !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1486 		sdata_info(sdata,
1487 			   "driver doesn't support chan-switch with channel contexts\n");
1488 		goto drop_connection;
1489 	}
1490 
1491 	if (drv_pre_channel_switch(sdata, &ch_switch)) {
1492 		sdata_info(sdata,
1493 			   "preparing for channel switch failed, disconnecting\n");
1494 		goto drop_connection;
1495 	}
1496 
1497 	res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1498 					    chanctx->mode, false);
1499 	if (res) {
1500 		sdata_info(sdata,
1501 			   "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1502 			   res);
1503 		goto drop_connection;
1504 	}
1505 	mutex_unlock(&local->chanctx_mtx);
1506 
1507 	sdata->vif.bss_conf.csa_active = true;
1508 	sdata->csa_chandef = csa_ie.chandef;
1509 	sdata->csa_block_tx = csa_ie.mode;
1510 	ifmgd->csa_ignored_same_chan = false;
1511 	ifmgd->beacon_crc_valid = false;
1512 
1513 	if (sdata->csa_block_tx)
1514 		ieee80211_stop_vif_queues(local, sdata,
1515 					  IEEE80211_QUEUE_STOP_REASON_CSA);
1516 	mutex_unlock(&local->mtx);
1517 
1518 	cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1519 					  csa_ie.count, csa_ie.mode);
1520 
1521 	if (local->ops->channel_switch) {
1522 		/* use driver's channel switch callback */
1523 		drv_channel_switch(local, sdata, &ch_switch);
1524 		return;
1525 	}
1526 
1527 	/* channel switch handled in software */
1528 	if (csa_ie.count <= 1)
1529 		ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1530 	else
1531 		mod_timer(&ifmgd->chswitch_timer,
1532 			  TU_TO_EXP_TIME((csa_ie.count - 1) *
1533 					 cbss->beacon_interval));
1534 	return;
1535  lock_and_drop_connection:
1536 	mutex_lock(&local->mtx);
1537 	mutex_lock(&local->chanctx_mtx);
1538  drop_connection:
1539 	/*
1540 	 * This is just so that the disconnect flow will know that
1541 	 * we were trying to switch channel and failed. In case the
1542 	 * mode is 1 (we are not allowed to Tx), we will know not to
1543 	 * send a deauthentication frame. Those two fields will be
1544 	 * reset when the disconnection worker runs.
1545 	 */
1546 	sdata->vif.bss_conf.csa_active = true;
1547 	sdata->csa_block_tx = csa_ie.mode;
1548 
1549 	ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1550 	mutex_unlock(&local->chanctx_mtx);
1551 	mutex_unlock(&local->mtx);
1552 }
1553 
1554 static bool
ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data * sdata,struct ieee80211_channel * channel,const u8 * country_ie,u8 country_ie_len,const u8 * pwr_constr_elem,int * chan_pwr,int * pwr_reduction)1555 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1556 				 struct ieee80211_channel *channel,
1557 				 const u8 *country_ie, u8 country_ie_len,
1558 				 const u8 *pwr_constr_elem,
1559 				 int *chan_pwr, int *pwr_reduction)
1560 {
1561 	struct ieee80211_country_ie_triplet *triplet;
1562 	int chan = ieee80211_frequency_to_channel(channel->center_freq);
1563 	int i, chan_increment;
1564 	bool have_chan_pwr = false;
1565 
1566 	/* Invalid IE */
1567 	if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1568 		return false;
1569 
1570 	triplet = (void *)(country_ie + 3);
1571 	country_ie_len -= 3;
1572 
1573 	switch (channel->band) {
1574 	default:
1575 		WARN_ON_ONCE(1);
1576 		fallthrough;
1577 	case NL80211_BAND_2GHZ:
1578 	case NL80211_BAND_60GHZ:
1579 	case NL80211_BAND_LC:
1580 		chan_increment = 1;
1581 		break;
1582 	case NL80211_BAND_5GHZ:
1583 		chan_increment = 4;
1584 		break;
1585 	case NL80211_BAND_6GHZ:
1586 		/*
1587 		 * In the 6 GHz band, the "maximum transmit power level"
1588 		 * field in the triplets is reserved, and thus will be
1589 		 * zero and we shouldn't use it to control TX power.
1590 		 * The actual TX power will be given in the transmit
1591 		 * power envelope element instead.
1592 		 */
1593 		return false;
1594 	}
1595 
1596 	/* find channel */
1597 	while (country_ie_len >= 3) {
1598 		u8 first_channel = triplet->chans.first_channel;
1599 
1600 		if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1601 			goto next;
1602 
1603 		for (i = 0; i < triplet->chans.num_channels; i++) {
1604 			if (first_channel + i * chan_increment == chan) {
1605 				have_chan_pwr = true;
1606 				*chan_pwr = triplet->chans.max_power;
1607 				break;
1608 			}
1609 		}
1610 		if (have_chan_pwr)
1611 			break;
1612 
1613  next:
1614 		triplet++;
1615 		country_ie_len -= 3;
1616 	}
1617 
1618 	if (have_chan_pwr && pwr_constr_elem)
1619 		*pwr_reduction = *pwr_constr_elem;
1620 	else
1621 		*pwr_reduction = 0;
1622 
1623 	return have_chan_pwr;
1624 }
1625 
ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data * sdata,struct ieee80211_channel * channel,const u8 * cisco_dtpc_ie,int * pwr_level)1626 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1627 				      struct ieee80211_channel *channel,
1628 				      const u8 *cisco_dtpc_ie,
1629 				      int *pwr_level)
1630 {
1631 	/* From practical testing, the first data byte of the DTPC element
1632 	 * seems to contain the requested dBm level, and the CLI on Cisco
1633 	 * APs clearly state the range is -127 to 127 dBm, which indicates
1634 	 * a signed byte, although it seemingly never actually goes negative.
1635 	 * The other byte seems to always be zero.
1636 	 */
1637 	*pwr_level = (__s8)cisco_dtpc_ie[4];
1638 }
1639 
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data * sdata,struct ieee80211_channel * channel,struct ieee80211_mgmt * mgmt,const u8 * country_ie,u8 country_ie_len,const u8 * pwr_constr_ie,const u8 * cisco_dtpc_ie)1640 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1641 				       struct ieee80211_channel *channel,
1642 				       struct ieee80211_mgmt *mgmt,
1643 				       const u8 *country_ie, u8 country_ie_len,
1644 				       const u8 *pwr_constr_ie,
1645 				       const u8 *cisco_dtpc_ie)
1646 {
1647 	bool has_80211h_pwr = false, has_cisco_pwr = false;
1648 	int chan_pwr = 0, pwr_reduction_80211h = 0;
1649 	int pwr_level_cisco, pwr_level_80211h;
1650 	int new_ap_level;
1651 	__le16 capab = mgmt->u.probe_resp.capab_info;
1652 
1653 	if (ieee80211_is_s1g_beacon(mgmt->frame_control))
1654 		return 0;	/* TODO */
1655 
1656 	if (country_ie &&
1657 	    (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1658 	     capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1659 		has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1660 			sdata, channel, country_ie, country_ie_len,
1661 			pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1662 		pwr_level_80211h =
1663 			max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1664 	}
1665 
1666 	if (cisco_dtpc_ie) {
1667 		ieee80211_find_cisco_dtpc(
1668 			sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1669 		has_cisco_pwr = true;
1670 	}
1671 
1672 	if (!has_80211h_pwr && !has_cisco_pwr)
1673 		return 0;
1674 
1675 	/* If we have both 802.11h and Cisco DTPC, apply both limits
1676 	 * by picking the smallest of the two power levels advertised.
1677 	 */
1678 	if (has_80211h_pwr &&
1679 	    (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1680 		new_ap_level = pwr_level_80211h;
1681 
1682 		if (sdata->ap_power_level == new_ap_level)
1683 			return 0;
1684 
1685 		sdata_dbg(sdata,
1686 			  "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1687 			  pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1688 			  sdata->u.mgd.bssid);
1689 	} else {  /* has_cisco_pwr is always true here. */
1690 		new_ap_level = pwr_level_cisco;
1691 
1692 		if (sdata->ap_power_level == new_ap_level)
1693 			return 0;
1694 
1695 		sdata_dbg(sdata,
1696 			  "Limiting TX power to %d dBm as advertised by %pM\n",
1697 			  pwr_level_cisco, sdata->u.mgd.bssid);
1698 	}
1699 
1700 	sdata->ap_power_level = new_ap_level;
1701 	if (__ieee80211_recalc_txpower(sdata))
1702 		return BSS_CHANGED_TXPOWER;
1703 	return 0;
1704 }
1705 
1706 /* powersave */
ieee80211_enable_ps(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1707 static void ieee80211_enable_ps(struct ieee80211_local *local,
1708 				struct ieee80211_sub_if_data *sdata)
1709 {
1710 	struct ieee80211_conf *conf = &local->hw.conf;
1711 
1712 	/*
1713 	 * If we are scanning right now then the parameters will
1714 	 * take effect when scan finishes.
1715 	 */
1716 	if (local->scanning)
1717 		return;
1718 
1719 	if (conf->dynamic_ps_timeout > 0 &&
1720 	    !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1721 		mod_timer(&local->dynamic_ps_timer, jiffies +
1722 			  msecs_to_jiffies(conf->dynamic_ps_timeout));
1723 	} else {
1724 		if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1725 			ieee80211_send_nullfunc(local, sdata, true);
1726 
1727 		if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1728 		    ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1729 			return;
1730 
1731 		conf->flags |= IEEE80211_CONF_PS;
1732 		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1733 	}
1734 }
1735 
ieee80211_change_ps(struct ieee80211_local * local)1736 static void ieee80211_change_ps(struct ieee80211_local *local)
1737 {
1738 	struct ieee80211_conf *conf = &local->hw.conf;
1739 
1740 	if (local->ps_sdata) {
1741 		ieee80211_enable_ps(local, local->ps_sdata);
1742 	} else if (conf->flags & IEEE80211_CONF_PS) {
1743 		conf->flags &= ~IEEE80211_CONF_PS;
1744 		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1745 		del_timer_sync(&local->dynamic_ps_timer);
1746 		cancel_work_sync(&local->dynamic_ps_enable_work);
1747 	}
1748 }
1749 
ieee80211_powersave_allowed(struct ieee80211_sub_if_data * sdata)1750 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1751 {
1752 	struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1753 	struct sta_info *sta = NULL;
1754 	bool authorized = false;
1755 
1756 	if (!mgd->powersave)
1757 		return false;
1758 
1759 	if (mgd->broken_ap)
1760 		return false;
1761 
1762 	if (!mgd->associated)
1763 		return false;
1764 
1765 	if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1766 		return false;
1767 
1768 	if (!mgd->have_beacon)
1769 		return false;
1770 
1771 	rcu_read_lock();
1772 	sta = sta_info_get(sdata, mgd->bssid);
1773 	if (sta)
1774 		authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1775 	rcu_read_unlock();
1776 
1777 	return authorized;
1778 }
1779 
1780 /* need to hold RTNL or interface lock */
ieee80211_recalc_ps(struct ieee80211_local * local)1781 void ieee80211_recalc_ps(struct ieee80211_local *local)
1782 {
1783 	struct ieee80211_sub_if_data *sdata, *found = NULL;
1784 	int count = 0;
1785 	int timeout;
1786 
1787 	if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1788 		local->ps_sdata = NULL;
1789 		return;
1790 	}
1791 
1792 	list_for_each_entry(sdata, &local->interfaces, list) {
1793 		if (!ieee80211_sdata_running(sdata))
1794 			continue;
1795 		if (sdata->vif.type == NL80211_IFTYPE_AP) {
1796 			/* If an AP vif is found, then disable PS
1797 			 * by setting the count to zero thereby setting
1798 			 * ps_sdata to NULL.
1799 			 */
1800 			count = 0;
1801 			break;
1802 		}
1803 		if (sdata->vif.type != NL80211_IFTYPE_STATION)
1804 			continue;
1805 		found = sdata;
1806 		count++;
1807 	}
1808 
1809 	if (count == 1 && ieee80211_powersave_allowed(found)) {
1810 		u8 dtimper = found->u.mgd.dtim_period;
1811 
1812 		timeout = local->dynamic_ps_forced_timeout;
1813 		if (timeout < 0)
1814 			timeout = 100;
1815 		local->hw.conf.dynamic_ps_timeout = timeout;
1816 
1817 		/* If the TIM IE is invalid, pretend the value is 1 */
1818 		if (!dtimper)
1819 			dtimper = 1;
1820 
1821 		local->hw.conf.ps_dtim_period = dtimper;
1822 		local->ps_sdata = found;
1823 	} else {
1824 		local->ps_sdata = NULL;
1825 	}
1826 
1827 	ieee80211_change_ps(local);
1828 }
1829 
ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data * sdata)1830 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1831 {
1832 	bool ps_allowed = ieee80211_powersave_allowed(sdata);
1833 
1834 	if (sdata->vif.bss_conf.ps != ps_allowed) {
1835 		sdata->vif.bss_conf.ps = ps_allowed;
1836 		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1837 	}
1838 }
1839 
ieee80211_dynamic_ps_disable_work(struct work_struct * work)1840 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1841 {
1842 	struct ieee80211_local *local =
1843 		container_of(work, struct ieee80211_local,
1844 			     dynamic_ps_disable_work);
1845 
1846 	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1847 		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1848 		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1849 	}
1850 
1851 	ieee80211_wake_queues_by_reason(&local->hw,
1852 					IEEE80211_MAX_QUEUE_MAP,
1853 					IEEE80211_QUEUE_STOP_REASON_PS,
1854 					false);
1855 }
1856 
ieee80211_dynamic_ps_enable_work(struct work_struct * work)1857 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1858 {
1859 	struct ieee80211_local *local =
1860 		container_of(work, struct ieee80211_local,
1861 			     dynamic_ps_enable_work);
1862 	struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1863 	struct ieee80211_if_managed *ifmgd;
1864 	unsigned long flags;
1865 	int q;
1866 
1867 	/* can only happen when PS was just disabled anyway */
1868 	if (!sdata)
1869 		return;
1870 
1871 	ifmgd = &sdata->u.mgd;
1872 
1873 	if (local->hw.conf.flags & IEEE80211_CONF_PS)
1874 		return;
1875 
1876 	if (local->hw.conf.dynamic_ps_timeout > 0) {
1877 		/* don't enter PS if TX frames are pending */
1878 		if (drv_tx_frames_pending(local)) {
1879 			mod_timer(&local->dynamic_ps_timer, jiffies +
1880 				  msecs_to_jiffies(
1881 				  local->hw.conf.dynamic_ps_timeout));
1882 			return;
1883 		}
1884 
1885 		/*
1886 		 * transmission can be stopped by others which leads to
1887 		 * dynamic_ps_timer expiry. Postpone the ps timer if it
1888 		 * is not the actual idle state.
1889 		 */
1890 		spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1891 		for (q = 0; q < local->hw.queues; q++) {
1892 			if (local->queue_stop_reasons[q]) {
1893 				spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1894 						       flags);
1895 				mod_timer(&local->dynamic_ps_timer, jiffies +
1896 					  msecs_to_jiffies(
1897 					  local->hw.conf.dynamic_ps_timeout));
1898 				return;
1899 			}
1900 		}
1901 		spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1902 	}
1903 
1904 	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1905 	    !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1906 		if (drv_tx_frames_pending(local)) {
1907 			mod_timer(&local->dynamic_ps_timer, jiffies +
1908 				  msecs_to_jiffies(
1909 				  local->hw.conf.dynamic_ps_timeout));
1910 		} else {
1911 			ieee80211_send_nullfunc(local, sdata, true);
1912 			/* Flush to get the tx status of nullfunc frame */
1913 			ieee80211_flush_queues(local, sdata, false);
1914 		}
1915 	}
1916 
1917 	if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1918 	      ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1919 	    (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1920 		ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1921 		local->hw.conf.flags |= IEEE80211_CONF_PS;
1922 		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1923 	}
1924 }
1925 
ieee80211_dynamic_ps_timer(struct timer_list * t)1926 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1927 {
1928 	struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1929 
1930 	ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1931 }
1932 
ieee80211_dfs_cac_timer_work(struct work_struct * work)1933 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1934 {
1935 	struct delayed_work *delayed_work = to_delayed_work(work);
1936 	struct ieee80211_sub_if_data *sdata =
1937 		container_of(delayed_work, struct ieee80211_sub_if_data,
1938 			     dfs_cac_timer_work);
1939 	struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1940 
1941 	mutex_lock(&sdata->local->mtx);
1942 	if (sdata->wdev.cac_started) {
1943 		ieee80211_vif_release_channel(sdata);
1944 		cfg80211_cac_event(sdata->dev, &chandef,
1945 				   NL80211_RADAR_CAC_FINISHED,
1946 				   GFP_KERNEL);
1947 	}
1948 	mutex_unlock(&sdata->local->mtx);
1949 }
1950 
1951 static bool
__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data * sdata)1952 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1953 {
1954 	struct ieee80211_local *local = sdata->local;
1955 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1956 	bool ret = false;
1957 	int ac;
1958 
1959 	if (local->hw.queues < IEEE80211_NUM_ACS)
1960 		return false;
1961 
1962 	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1963 		struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1964 		int non_acm_ac;
1965 		unsigned long now = jiffies;
1966 
1967 		if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1968 		    tx_tspec->admitted_time &&
1969 		    time_after(now, tx_tspec->time_slice_start + HZ)) {
1970 			tx_tspec->consumed_tx_time = 0;
1971 			tx_tspec->time_slice_start = now;
1972 
1973 			if (tx_tspec->downgraded)
1974 				tx_tspec->action =
1975 					TX_TSPEC_ACTION_STOP_DOWNGRADE;
1976 		}
1977 
1978 		switch (tx_tspec->action) {
1979 		case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1980 			/* take the original parameters */
1981 			if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1982 				sdata_err(sdata,
1983 					  "failed to set TX queue parameters for queue %d\n",
1984 					  ac);
1985 			tx_tspec->action = TX_TSPEC_ACTION_NONE;
1986 			tx_tspec->downgraded = false;
1987 			ret = true;
1988 			break;
1989 		case TX_TSPEC_ACTION_DOWNGRADE:
1990 			if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1991 				tx_tspec->action = TX_TSPEC_ACTION_NONE;
1992 				ret = true;
1993 				break;
1994 			}
1995 			/* downgrade next lower non-ACM AC */
1996 			for (non_acm_ac = ac + 1;
1997 			     non_acm_ac < IEEE80211_NUM_ACS;
1998 			     non_acm_ac++)
1999 				if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
2000 					break;
2001 			/* Usually the loop will result in using BK even if it
2002 			 * requires admission control, but such a configuration
2003 			 * makes no sense and we have to transmit somehow - the
2004 			 * AC selection does the same thing.
2005 			 * If we started out trying to downgrade from BK, then
2006 			 * the extra condition here might be needed.
2007 			 */
2008 			if (non_acm_ac >= IEEE80211_NUM_ACS)
2009 				non_acm_ac = IEEE80211_AC_BK;
2010 			if (drv_conf_tx(local, sdata, ac,
2011 					&sdata->tx_conf[non_acm_ac]))
2012 				sdata_err(sdata,
2013 					  "failed to set TX queue parameters for queue %d\n",
2014 					  ac);
2015 			tx_tspec->action = TX_TSPEC_ACTION_NONE;
2016 			ret = true;
2017 			schedule_delayed_work(&ifmgd->tx_tspec_wk,
2018 				tx_tspec->time_slice_start + HZ - now + 1);
2019 			break;
2020 		case TX_TSPEC_ACTION_NONE:
2021 			/* nothing now */
2022 			break;
2023 		}
2024 	}
2025 
2026 	return ret;
2027 }
2028 
ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data * sdata)2029 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2030 {
2031 	if (__ieee80211_sta_handle_tspec_ac_params(sdata))
2032 		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
2033 }
2034 
ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct * work)2035 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
2036 {
2037 	struct ieee80211_sub_if_data *sdata;
2038 
2039 	sdata = container_of(work, struct ieee80211_sub_if_data,
2040 			     u.mgd.tx_tspec_wk.work);
2041 	ieee80211_sta_handle_tspec_ac_params(sdata);
2042 }
2043 
2044 /* MLME */
2045 static bool
ieee80211_sta_wmm_params(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,const u8 * wmm_param,size_t wmm_param_len,const struct ieee80211_mu_edca_param_set * mu_edca)2046 ieee80211_sta_wmm_params(struct ieee80211_local *local,
2047 			 struct ieee80211_sub_if_data *sdata,
2048 			 const u8 *wmm_param, size_t wmm_param_len,
2049 			 const struct ieee80211_mu_edca_param_set *mu_edca)
2050 {
2051 	struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
2052 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2053 	size_t left;
2054 	int count, mu_edca_count, ac;
2055 	const u8 *pos;
2056 	u8 uapsd_queues = 0;
2057 
2058 	if (!local->ops->conf_tx)
2059 		return false;
2060 
2061 	if (local->hw.queues < IEEE80211_NUM_ACS)
2062 		return false;
2063 
2064 	if (!wmm_param)
2065 		return false;
2066 
2067 	if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
2068 		return false;
2069 
2070 	if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
2071 		uapsd_queues = ifmgd->uapsd_queues;
2072 
2073 	count = wmm_param[6] & 0x0f;
2074 	/* -1 is the initial value of ifmgd->mu_edca_last_param_set.
2075 	 * if mu_edca was preset before and now it disappeared tell
2076 	 * the driver about it.
2077 	 */
2078 	mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
2079 	if (count == ifmgd->wmm_last_param_set &&
2080 	    mu_edca_count == ifmgd->mu_edca_last_param_set)
2081 		return false;
2082 	ifmgd->wmm_last_param_set = count;
2083 	ifmgd->mu_edca_last_param_set = mu_edca_count;
2084 
2085 	pos = wmm_param + 8;
2086 	left = wmm_param_len - 8;
2087 
2088 	memset(&params, 0, sizeof(params));
2089 
2090 	sdata->wmm_acm = 0;
2091 	for (; left >= 4; left -= 4, pos += 4) {
2092 		int aci = (pos[0] >> 5) & 0x03;
2093 		int acm = (pos[0] >> 4) & 0x01;
2094 		bool uapsd = false;
2095 
2096 		switch (aci) {
2097 		case 1: /* AC_BK */
2098 			ac = IEEE80211_AC_BK;
2099 			if (acm)
2100 				sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
2101 			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
2102 				uapsd = true;
2103 			params[ac].mu_edca = !!mu_edca;
2104 			if (mu_edca)
2105 				params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2106 			break;
2107 		case 2: /* AC_VI */
2108 			ac = IEEE80211_AC_VI;
2109 			if (acm)
2110 				sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
2111 			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
2112 				uapsd = true;
2113 			params[ac].mu_edca = !!mu_edca;
2114 			if (mu_edca)
2115 				params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2116 			break;
2117 		case 3: /* AC_VO */
2118 			ac = IEEE80211_AC_VO;
2119 			if (acm)
2120 				sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2121 			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2122 				uapsd = true;
2123 			params[ac].mu_edca = !!mu_edca;
2124 			if (mu_edca)
2125 				params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2126 			break;
2127 		case 0: /* AC_BE */
2128 		default:
2129 			ac = IEEE80211_AC_BE;
2130 			if (acm)
2131 				sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2132 			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2133 				uapsd = true;
2134 			params[ac].mu_edca = !!mu_edca;
2135 			if (mu_edca)
2136 				params[ac].mu_edca_param_rec = mu_edca->ac_be;
2137 			break;
2138 		}
2139 
2140 		params[ac].aifs = pos[0] & 0x0f;
2141 
2142 		if (params[ac].aifs < 2) {
2143 			sdata_info(sdata,
2144 				   "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2145 				   params[ac].aifs, aci);
2146 			params[ac].aifs = 2;
2147 		}
2148 		params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2149 		params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2150 		params[ac].txop = get_unaligned_le16(pos + 2);
2151 		params[ac].acm = acm;
2152 		params[ac].uapsd = uapsd;
2153 
2154 		if (params[ac].cw_min == 0 ||
2155 		    params[ac].cw_min > params[ac].cw_max) {
2156 			sdata_info(sdata,
2157 				   "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2158 				   params[ac].cw_min, params[ac].cw_max, aci);
2159 			return false;
2160 		}
2161 		ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2162 	}
2163 
2164 	/* WMM specification requires all 4 ACIs. */
2165 	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2166 		if (params[ac].cw_min == 0) {
2167 			sdata_info(sdata,
2168 				   "AP has invalid WMM params (missing AC %d), using defaults\n",
2169 				   ac);
2170 			return false;
2171 		}
2172 	}
2173 
2174 	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2175 		mlme_dbg(sdata,
2176 			 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2177 			 ac, params[ac].acm,
2178 			 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2179 			 params[ac].txop, params[ac].uapsd,
2180 			 ifmgd->tx_tspec[ac].downgraded);
2181 		sdata->tx_conf[ac] = params[ac];
2182 		if (!ifmgd->tx_tspec[ac].downgraded &&
2183 		    drv_conf_tx(local, sdata, ac, &params[ac]))
2184 			sdata_err(sdata,
2185 				  "failed to set TX queue parameters for AC %d\n",
2186 				  ac);
2187 	}
2188 
2189 	/* enable WMM or activate new settings */
2190 	sdata->vif.bss_conf.qos = true;
2191 	return true;
2192 }
2193 
__ieee80211_stop_poll(struct ieee80211_sub_if_data * sdata)2194 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2195 {
2196 	lockdep_assert_held(&sdata->local->mtx);
2197 
2198 	sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2199 	ieee80211_run_deferred_scan(sdata->local);
2200 }
2201 
ieee80211_stop_poll(struct ieee80211_sub_if_data * sdata)2202 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2203 {
2204 	mutex_lock(&sdata->local->mtx);
2205 	__ieee80211_stop_poll(sdata);
2206 	mutex_unlock(&sdata->local->mtx);
2207 }
2208 
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data * sdata,u16 capab,bool erp_valid,u8 erp)2209 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2210 					   u16 capab, bool erp_valid, u8 erp)
2211 {
2212 	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2213 	struct ieee80211_supported_band *sband;
2214 	u32 changed = 0;
2215 	bool use_protection;
2216 	bool use_short_preamble;
2217 	bool use_short_slot;
2218 
2219 	sband = ieee80211_get_sband(sdata);
2220 	if (!sband)
2221 		return changed;
2222 
2223 	if (erp_valid) {
2224 		use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2225 		use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2226 	} else {
2227 		use_protection = false;
2228 		use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2229 	}
2230 
2231 	use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2232 	if (sband->band == NL80211_BAND_5GHZ ||
2233 	    sband->band == NL80211_BAND_6GHZ)
2234 		use_short_slot = true;
2235 
2236 	if (use_protection != bss_conf->use_cts_prot) {
2237 		bss_conf->use_cts_prot = use_protection;
2238 		changed |= BSS_CHANGED_ERP_CTS_PROT;
2239 	}
2240 
2241 	if (use_short_preamble != bss_conf->use_short_preamble) {
2242 		bss_conf->use_short_preamble = use_short_preamble;
2243 		changed |= BSS_CHANGED_ERP_PREAMBLE;
2244 	}
2245 
2246 	if (use_short_slot != bss_conf->use_short_slot) {
2247 		bss_conf->use_short_slot = use_short_slot;
2248 		changed |= BSS_CHANGED_ERP_SLOT;
2249 	}
2250 
2251 	return changed;
2252 }
2253 
ieee80211_set_associated(struct ieee80211_sub_if_data * sdata,struct cfg80211_bss * cbss,u32 bss_info_changed)2254 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2255 				     struct cfg80211_bss *cbss,
2256 				     u32 bss_info_changed)
2257 {
2258 	struct ieee80211_bss *bss = (void *)cbss->priv;
2259 	struct ieee80211_local *local = sdata->local;
2260 	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2261 
2262 	bss_info_changed |= BSS_CHANGED_ASSOC;
2263 	bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2264 		bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2265 
2266 	sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2267 		beacon_loss_count * bss_conf->beacon_int));
2268 
2269 	sdata->u.mgd.associated = true;
2270 	sdata->u.mgd.assoc_bss = cbss;
2271 	memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2272 
2273 	ieee80211_check_rate_mask(sdata);
2274 
2275 	sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2276 
2277 	if (sdata->vif.p2p ||
2278 	    sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2279 		const struct cfg80211_bss_ies *ies;
2280 
2281 		rcu_read_lock();
2282 		ies = rcu_dereference(cbss->ies);
2283 		if (ies) {
2284 			int ret;
2285 
2286 			ret = cfg80211_get_p2p_attr(
2287 					ies->data, ies->len,
2288 					IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2289 					(u8 *) &bss_conf->p2p_noa_attr,
2290 					sizeof(bss_conf->p2p_noa_attr));
2291 			if (ret >= 2) {
2292 				sdata->u.mgd.p2p_noa_index =
2293 					bss_conf->p2p_noa_attr.index;
2294 				bss_info_changed |= BSS_CHANGED_P2P_PS;
2295 			}
2296 		}
2297 		rcu_read_unlock();
2298 	}
2299 
2300 	/* just to be sure */
2301 	ieee80211_stop_poll(sdata);
2302 
2303 	ieee80211_led_assoc(local, 1);
2304 
2305 	if (sdata->u.mgd.have_beacon) {
2306 		/*
2307 		 * If the AP is buggy we may get here with no DTIM period
2308 		 * known, so assume it's 1 which is the only safe assumption
2309 		 * in that case, although if the TIM IE is broken powersave
2310 		 * probably just won't work at all.
2311 		 */
2312 		bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2313 		bss_conf->beacon_rate = bss->beacon_rate;
2314 		bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2315 	} else {
2316 		bss_conf->beacon_rate = NULL;
2317 		bss_conf->dtim_period = 0;
2318 	}
2319 
2320 	bss_conf->assoc = 1;
2321 
2322 	/* Tell the driver to monitor connection quality (if supported) */
2323 	if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2324 	    bss_conf->cqm_rssi_thold)
2325 		bss_info_changed |= BSS_CHANGED_CQM;
2326 
2327 	/* Enable ARP filtering */
2328 	if (bss_conf->arp_addr_cnt)
2329 		bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2330 
2331 	ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2332 
2333 	mutex_lock(&local->iflist_mtx);
2334 	ieee80211_recalc_ps(local);
2335 	mutex_unlock(&local->iflist_mtx);
2336 
2337 	ieee80211_recalc_smps(sdata);
2338 	ieee80211_recalc_ps_vif(sdata);
2339 
2340 	netif_carrier_on(sdata->dev);
2341 }
2342 
ieee80211_set_disassoc(struct ieee80211_sub_if_data * sdata,u16 stype,u16 reason,bool tx,u8 * frame_buf)2343 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2344 				   u16 stype, u16 reason, bool tx,
2345 				   u8 *frame_buf)
2346 {
2347 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2348 	struct ieee80211_local *local = sdata->local;
2349 	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2350 	u32 changed = 0;
2351 	struct ieee80211_prep_tx_info info = {
2352 		.subtype = stype,
2353 	};
2354 
2355 	sdata_assert_lock(sdata);
2356 
2357 	if (WARN_ON_ONCE(tx && !frame_buf))
2358 		return;
2359 
2360 	if (WARN_ON(!ifmgd->associated))
2361 		return;
2362 
2363 	ieee80211_stop_poll(sdata);
2364 
2365 	ifmgd->associated = false;
2366 	ifmgd->assoc_bss = NULL;
2367 	netif_carrier_off(sdata->dev);
2368 
2369 	/*
2370 	 * if we want to get out of ps before disassoc (why?) we have
2371 	 * to do it before sending disassoc, as otherwise the null-packet
2372 	 * won't be valid.
2373 	 */
2374 	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2375 		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2376 		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2377 	}
2378 	local->ps_sdata = NULL;
2379 
2380 	/* disable per-vif ps */
2381 	ieee80211_recalc_ps_vif(sdata);
2382 
2383 	/* make sure ongoing transmission finishes */
2384 	synchronize_net();
2385 
2386 	/*
2387 	 * drop any frame before deauth/disassoc, this can be data or
2388 	 * management frame. Since we are disconnecting, we should not
2389 	 * insist sending these frames which can take time and delay
2390 	 * the disconnection and possible the roaming.
2391 	 */
2392 	if (tx)
2393 		ieee80211_flush_queues(local, sdata, true);
2394 
2395 	/* deauthenticate/disassociate now */
2396 	if (tx || frame_buf) {
2397 		/*
2398 		 * In multi channel scenarios guarantee that the virtual
2399 		 * interface is granted immediate airtime to transmit the
2400 		 * deauthentication frame by calling mgd_prepare_tx, if the
2401 		 * driver requested so.
2402 		 */
2403 		if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2404 		    !ifmgd->have_beacon) {
2405 			drv_mgd_prepare_tx(sdata->local, sdata, &info);
2406 		}
2407 
2408 		ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid,
2409 					       ifmgd->bssid, stype, reason,
2410 					       tx, frame_buf);
2411 	}
2412 
2413 	/* flush out frame - make sure the deauth was actually sent */
2414 	if (tx)
2415 		ieee80211_flush_queues(local, sdata, false);
2416 
2417 	drv_mgd_complete_tx(sdata->local, sdata, &info);
2418 
2419 	/* clear bssid only after building the needed mgmt frames */
2420 	eth_zero_addr(ifmgd->bssid);
2421 
2422 	sdata->vif.bss_conf.ssid_len = 0;
2423 
2424 	/* remove AP and TDLS peers */
2425 	sta_info_flush(sdata);
2426 
2427 	/* finally reset all BSS / config parameters */
2428 	changed |= ieee80211_reset_erp_info(sdata);
2429 
2430 	ieee80211_led_assoc(local, 0);
2431 	changed |= BSS_CHANGED_ASSOC;
2432 	sdata->vif.bss_conf.assoc = false;
2433 
2434 	ifmgd->p2p_noa_index = -1;
2435 	memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2436 	       sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2437 
2438 	/* on the next assoc, re-program HT/VHT parameters */
2439 	memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2440 	memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2441 	memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2442 	memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2443 
2444 	/* reset MU-MIMO ownership and group data */
2445 	memset(sdata->vif.bss_conf.mu_group.membership, 0,
2446 	       sizeof(sdata->vif.bss_conf.mu_group.membership));
2447 	memset(sdata->vif.bss_conf.mu_group.position, 0,
2448 	       sizeof(sdata->vif.bss_conf.mu_group.position));
2449 	changed |= BSS_CHANGED_MU_GROUPS;
2450 	sdata->vif.bss_conf.mu_mimo_owner = false;
2451 
2452 	sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2453 
2454 	del_timer_sync(&local->dynamic_ps_timer);
2455 	cancel_work_sync(&local->dynamic_ps_enable_work);
2456 
2457 	/* Disable ARP filtering */
2458 	if (sdata->vif.bss_conf.arp_addr_cnt)
2459 		changed |= BSS_CHANGED_ARP_FILTER;
2460 
2461 	sdata->vif.bss_conf.qos = false;
2462 	changed |= BSS_CHANGED_QOS;
2463 
2464 	/* The BSSID (not really interesting) and HT changed */
2465 	changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2466 	ieee80211_bss_info_change_notify(sdata, changed);
2467 
2468 	/* disassociated - set to defaults now */
2469 	ieee80211_set_wmm_default(sdata, false, false);
2470 
2471 	del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2472 	del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2473 	del_timer_sync(&sdata->u.mgd.timer);
2474 	del_timer_sync(&sdata->u.mgd.chswitch_timer);
2475 
2476 	sdata->vif.bss_conf.dtim_period = 0;
2477 	sdata->vif.bss_conf.beacon_rate = NULL;
2478 
2479 	ifmgd->have_beacon = false;
2480 
2481 	ifmgd->flags = 0;
2482 	mutex_lock(&local->mtx);
2483 	ieee80211_vif_release_channel(sdata);
2484 
2485 	sdata->vif.bss_conf.csa_active = false;
2486 	ifmgd->csa_waiting_bcn = false;
2487 	ifmgd->csa_ignored_same_chan = false;
2488 	if (sdata->csa_block_tx) {
2489 		ieee80211_wake_vif_queues(local, sdata,
2490 					  IEEE80211_QUEUE_STOP_REASON_CSA);
2491 		sdata->csa_block_tx = false;
2492 	}
2493 	mutex_unlock(&local->mtx);
2494 
2495 	/* existing TX TSPEC sessions no longer exist */
2496 	memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2497 	cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2498 
2499 	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2500 
2501 	bss_conf->pwr_reduction = 0;
2502 	bss_conf->tx_pwr_env_num = 0;
2503 	memset(bss_conf->tx_pwr_env, 0, sizeof(bss_conf->tx_pwr_env));
2504 }
2505 
ieee80211_reset_ap_probe(struct ieee80211_sub_if_data * sdata)2506 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2507 {
2508 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2509 	struct ieee80211_local *local = sdata->local;
2510 
2511 	mutex_lock(&local->mtx);
2512 	if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2513 		goto out;
2514 
2515 	__ieee80211_stop_poll(sdata);
2516 
2517 	mutex_lock(&local->iflist_mtx);
2518 	ieee80211_recalc_ps(local);
2519 	mutex_unlock(&local->iflist_mtx);
2520 
2521 	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2522 		goto out;
2523 
2524 	/*
2525 	 * We've received a probe response, but are not sure whether
2526 	 * we have or will be receiving any beacons or data, so let's
2527 	 * schedule the timers again, just in case.
2528 	 */
2529 	ieee80211_sta_reset_beacon_monitor(sdata);
2530 
2531 	mod_timer(&ifmgd->conn_mon_timer,
2532 		  round_jiffies_up(jiffies +
2533 				   IEEE80211_CONNECTION_IDLE_TIME));
2534 out:
2535 	mutex_unlock(&local->mtx);
2536 }
2537 
ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_hdr * hdr,u16 tx_time)2538 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2539 					   struct ieee80211_hdr *hdr,
2540 					   u16 tx_time)
2541 {
2542 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2543 	u16 tid;
2544 	int ac;
2545 	struct ieee80211_sta_tx_tspec *tx_tspec;
2546 	unsigned long now = jiffies;
2547 
2548 	if (!ieee80211_is_data_qos(hdr->frame_control))
2549 		return;
2550 
2551 	tid = ieee80211_get_tid(hdr);
2552 	ac = ieee80211_ac_from_tid(tid);
2553 	tx_tspec = &ifmgd->tx_tspec[ac];
2554 
2555 	if (likely(!tx_tspec->admitted_time))
2556 		return;
2557 
2558 	if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2559 		tx_tspec->consumed_tx_time = 0;
2560 		tx_tspec->time_slice_start = now;
2561 
2562 		if (tx_tspec->downgraded) {
2563 			tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2564 			schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2565 		}
2566 	}
2567 
2568 	if (tx_tspec->downgraded)
2569 		return;
2570 
2571 	tx_tspec->consumed_tx_time += tx_time;
2572 
2573 	if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2574 		tx_tspec->downgraded = true;
2575 		tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2576 		schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2577 	}
2578 }
2579 
ieee80211_sta_tx_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_hdr * hdr,bool ack,u16 tx_time)2580 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2581 			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2582 {
2583 	ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2584 
2585 	if (!ieee80211_is_any_nullfunc(hdr->frame_control) ||
2586 	    !sdata->u.mgd.probe_send_count)
2587 		return;
2588 
2589 	if (ack)
2590 		sdata->u.mgd.probe_send_count = 0;
2591 	else
2592 		sdata->u.mgd.nullfunc_failed = true;
2593 	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2594 }
2595 
ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data * sdata,const u8 * src,const u8 * dst,const u8 * ssid,size_t ssid_len,struct ieee80211_channel * channel)2596 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2597 					  const u8 *src, const u8 *dst,
2598 					  const u8 *ssid, size_t ssid_len,
2599 					  struct ieee80211_channel *channel)
2600 {
2601 	struct sk_buff *skb;
2602 
2603 	skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2604 					ssid, ssid_len, NULL, 0,
2605 					IEEE80211_PROBE_FLAG_DIRECTED);
2606 	if (skb)
2607 		ieee80211_tx_skb(sdata, skb);
2608 }
2609 
ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data * sdata)2610 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2611 {
2612 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2613 	u8 *dst = ifmgd->bssid;
2614 	u8 unicast_limit = max(1, max_probe_tries - 3);
2615 	struct sta_info *sta;
2616 
2617 	/*
2618 	 * Try sending broadcast probe requests for the last three
2619 	 * probe requests after the first ones failed since some
2620 	 * buggy APs only support broadcast probe requests.
2621 	 */
2622 	if (ifmgd->probe_send_count >= unicast_limit)
2623 		dst = NULL;
2624 
2625 	/*
2626 	 * When the hardware reports an accurate Tx ACK status, it's
2627 	 * better to send a nullfunc frame instead of a probe request,
2628 	 * as it will kick us off the AP quickly if we aren't associated
2629 	 * anymore. The timeout will be reset if the frame is ACKed by
2630 	 * the AP.
2631 	 */
2632 	ifmgd->probe_send_count++;
2633 
2634 	if (dst) {
2635 		mutex_lock(&sdata->local->sta_mtx);
2636 		sta = sta_info_get(sdata, dst);
2637 		if (!WARN_ON(!sta))
2638 			ieee80211_check_fast_rx(sta);
2639 		mutex_unlock(&sdata->local->sta_mtx);
2640 	}
2641 
2642 	if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2643 		ifmgd->nullfunc_failed = false;
2644 		ieee80211_send_nullfunc(sdata->local, sdata, false);
2645 	} else {
2646 		ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2647 					      sdata->vif.bss_conf.ssid,
2648 					      sdata->vif.bss_conf.ssid_len,
2649 					      ifmgd->assoc_bss->channel);
2650 	}
2651 
2652 	ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2653 	run_again(sdata, ifmgd->probe_timeout);
2654 }
2655 
ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data * sdata,bool beacon)2656 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2657 				   bool beacon)
2658 {
2659 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2660 	bool already = false;
2661 
2662 	if (!ieee80211_sdata_running(sdata))
2663 		return;
2664 
2665 	sdata_lock(sdata);
2666 
2667 	if (!ifmgd->associated)
2668 		goto out;
2669 
2670 	mutex_lock(&sdata->local->mtx);
2671 
2672 	if (sdata->local->tmp_channel || sdata->local->scanning) {
2673 		mutex_unlock(&sdata->local->mtx);
2674 		goto out;
2675 	}
2676 
2677 	if (sdata->local->suspending) {
2678 		/* reschedule after resume */
2679 		mutex_unlock(&sdata->local->mtx);
2680 		ieee80211_reset_ap_probe(sdata);
2681 		goto out;
2682 	}
2683 
2684 	if (beacon) {
2685 		mlme_dbg_ratelimited(sdata,
2686 				     "detected beacon loss from AP (missed %d beacons) - probing\n",
2687 				     beacon_loss_count);
2688 
2689 		ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2690 	}
2691 
2692 	/*
2693 	 * The driver/our work has already reported this event or the
2694 	 * connection monitoring has kicked in and we have already sent
2695 	 * a probe request. Or maybe the AP died and the driver keeps
2696 	 * reporting until we disassociate...
2697 	 *
2698 	 * In either case we have to ignore the current call to this
2699 	 * function (except for setting the correct probe reason bit)
2700 	 * because otherwise we would reset the timer every time and
2701 	 * never check whether we received a probe response!
2702 	 */
2703 	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2704 		already = true;
2705 
2706 	ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2707 
2708 	mutex_unlock(&sdata->local->mtx);
2709 
2710 	if (already)
2711 		goto out;
2712 
2713 	mutex_lock(&sdata->local->iflist_mtx);
2714 	ieee80211_recalc_ps(sdata->local);
2715 	mutex_unlock(&sdata->local->iflist_mtx);
2716 
2717 	ifmgd->probe_send_count = 0;
2718 	ieee80211_mgd_probe_ap_send(sdata);
2719  out:
2720 	sdata_unlock(sdata);
2721 }
2722 
ieee80211_ap_probereq_get(struct ieee80211_hw * hw,struct ieee80211_vif * vif)2723 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2724 					  struct ieee80211_vif *vif)
2725 {
2726 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2727 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2728 	struct cfg80211_bss *cbss;
2729 	struct sk_buff *skb;
2730 	const struct element *ssid;
2731 	int ssid_len;
2732 
2733 	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2734 		return NULL;
2735 
2736 	sdata_assert_lock(sdata);
2737 
2738 	if (ifmgd->associated)
2739 		cbss = ifmgd->assoc_bss;
2740 	else if (ifmgd->auth_data)
2741 		cbss = ifmgd->auth_data->bss;
2742 	else if (ifmgd->assoc_data)
2743 		cbss = ifmgd->assoc_data->bss;
2744 	else
2745 		return NULL;
2746 
2747 	rcu_read_lock();
2748 	ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
2749 	if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN,
2750 		      "invalid SSID element (len=%d)",
2751 		      ssid ? ssid->datalen : -1))
2752 		ssid_len = 0;
2753 	else
2754 		ssid_len = ssid->datalen;
2755 
2756 	skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2757 					(u32) -1, cbss->channel,
2758 					ssid->data, ssid_len,
2759 					NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2760 	rcu_read_unlock();
2761 
2762 	return skb;
2763 }
2764 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2765 
ieee80211_report_disconnect(struct ieee80211_sub_if_data * sdata,const u8 * buf,size_t len,bool tx,u16 reason,bool reconnect)2766 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2767 					const u8 *buf, size_t len, bool tx,
2768 					u16 reason, bool reconnect)
2769 {
2770 	struct ieee80211_event event = {
2771 		.type = MLME_EVENT,
2772 		.u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2773 		.u.mlme.reason = reason,
2774 	};
2775 
2776 	if (tx)
2777 		cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect);
2778 	else
2779 		cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2780 
2781 	drv_event_callback(sdata->local, sdata, &event);
2782 }
2783 
__ieee80211_disconnect(struct ieee80211_sub_if_data * sdata)2784 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2785 {
2786 	struct ieee80211_local *local = sdata->local;
2787 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2788 	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2789 	bool tx;
2790 
2791 	sdata_lock(sdata);
2792 	if (!ifmgd->associated) {
2793 		sdata_unlock(sdata);
2794 		return;
2795 	}
2796 
2797 	tx = !sdata->csa_block_tx;
2798 
2799 	if (!ifmgd->driver_disconnect) {
2800 		/*
2801 		 * AP is probably out of range (or not reachable for another
2802 		 * reason) so remove the bss struct for that AP.
2803 		 */
2804 		cfg80211_unlink_bss(local->hw.wiphy, ifmgd->assoc_bss);
2805 	}
2806 
2807 	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2808 			       ifmgd->driver_disconnect ?
2809 					WLAN_REASON_DEAUTH_LEAVING :
2810 					WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2811 			       tx, frame_buf);
2812 	mutex_lock(&local->mtx);
2813 	sdata->vif.bss_conf.csa_active = false;
2814 	ifmgd->csa_waiting_bcn = false;
2815 	if (sdata->csa_block_tx) {
2816 		ieee80211_wake_vif_queues(local, sdata,
2817 					  IEEE80211_QUEUE_STOP_REASON_CSA);
2818 		sdata->csa_block_tx = false;
2819 	}
2820 	mutex_unlock(&local->mtx);
2821 
2822 	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2823 				    WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2824 				    ifmgd->reconnect);
2825 	ifmgd->reconnect = false;
2826 
2827 	sdata_unlock(sdata);
2828 }
2829 
ieee80211_beacon_connection_loss_work(struct work_struct * work)2830 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2831 {
2832 	struct ieee80211_sub_if_data *sdata =
2833 		container_of(work, struct ieee80211_sub_if_data,
2834 			     u.mgd.beacon_connection_loss_work);
2835 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2836 
2837 	if (ifmgd->associated)
2838 		ifmgd->beacon_loss_count++;
2839 
2840 	if (ifmgd->connection_loss) {
2841 		sdata_info(sdata, "Connection to AP %pM lost\n",
2842 			   ifmgd->bssid);
2843 		__ieee80211_disconnect(sdata);
2844 		ifmgd->connection_loss = false;
2845 	} else if (ifmgd->driver_disconnect) {
2846 		sdata_info(sdata,
2847 			   "Driver requested disconnection from AP %pM\n",
2848 			   ifmgd->bssid);
2849 		__ieee80211_disconnect(sdata);
2850 		ifmgd->driver_disconnect = false;
2851 	} else {
2852 		ieee80211_mgd_probe_ap(sdata, true);
2853 	}
2854 }
2855 
ieee80211_csa_connection_drop_work(struct work_struct * work)2856 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2857 {
2858 	struct ieee80211_sub_if_data *sdata =
2859 		container_of(work, struct ieee80211_sub_if_data,
2860 			     u.mgd.csa_connection_drop_work);
2861 
2862 	__ieee80211_disconnect(sdata);
2863 }
2864 
ieee80211_beacon_loss(struct ieee80211_vif * vif)2865 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2866 {
2867 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2868 	struct ieee80211_hw *hw = &sdata->local->hw;
2869 
2870 	trace_api_beacon_loss(sdata);
2871 
2872 	sdata->u.mgd.connection_loss = false;
2873 	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2874 }
2875 EXPORT_SYMBOL(ieee80211_beacon_loss);
2876 
ieee80211_connection_loss(struct ieee80211_vif * vif)2877 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2878 {
2879 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2880 	struct ieee80211_hw *hw = &sdata->local->hw;
2881 
2882 	trace_api_connection_loss(sdata);
2883 
2884 	sdata->u.mgd.connection_loss = true;
2885 	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2886 }
2887 EXPORT_SYMBOL(ieee80211_connection_loss);
2888 
ieee80211_disconnect(struct ieee80211_vif * vif,bool reconnect)2889 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect)
2890 {
2891 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2892 	struct ieee80211_hw *hw = &sdata->local->hw;
2893 
2894 	trace_api_disconnect(sdata, reconnect);
2895 
2896 	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2897 		return;
2898 
2899 	sdata->u.mgd.driver_disconnect = true;
2900 	sdata->u.mgd.reconnect = reconnect;
2901 	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2902 }
2903 EXPORT_SYMBOL(ieee80211_disconnect);
2904 
ieee80211_destroy_auth_data(struct ieee80211_sub_if_data * sdata,bool assoc)2905 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2906 					bool assoc)
2907 {
2908 	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2909 
2910 	sdata_assert_lock(sdata);
2911 
2912 	if (!assoc) {
2913 		/*
2914 		 * we are not authenticated yet, the only timer that could be
2915 		 * running is the timeout for the authentication response which
2916 		 * which is not relevant anymore.
2917 		 */
2918 		del_timer_sync(&sdata->u.mgd.timer);
2919 		sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2920 
2921 		eth_zero_addr(sdata->u.mgd.bssid);
2922 		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2923 		sdata->u.mgd.flags = 0;
2924 		mutex_lock(&sdata->local->mtx);
2925 		ieee80211_vif_release_channel(sdata);
2926 		mutex_unlock(&sdata->local->mtx);
2927 	}
2928 
2929 	cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2930 	kfree(auth_data);
2931 	sdata->u.mgd.auth_data = NULL;
2932 }
2933 
ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data * sdata,bool assoc,bool abandon)2934 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2935 					 bool assoc, bool abandon)
2936 {
2937 	struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2938 
2939 	sdata_assert_lock(sdata);
2940 
2941 	if (!assoc) {
2942 		/*
2943 		 * we are not associated yet, the only timer that could be
2944 		 * running is the timeout for the association response which
2945 		 * which is not relevant anymore.
2946 		 */
2947 		del_timer_sync(&sdata->u.mgd.timer);
2948 		sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2949 
2950 		eth_zero_addr(sdata->u.mgd.bssid);
2951 		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2952 		sdata->u.mgd.flags = 0;
2953 		sdata->vif.bss_conf.mu_mimo_owner = false;
2954 
2955 		mutex_lock(&sdata->local->mtx);
2956 		ieee80211_vif_release_channel(sdata);
2957 		mutex_unlock(&sdata->local->mtx);
2958 
2959 		if (abandon)
2960 			cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2961 	}
2962 
2963 	kfree(assoc_data);
2964 	sdata->u.mgd.assoc_data = NULL;
2965 }
2966 
ieee80211_auth_challenge(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)2967 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2968 				     struct ieee80211_mgmt *mgmt, size_t len)
2969 {
2970 	struct ieee80211_local *local = sdata->local;
2971 	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2972 	const struct element *challenge;
2973 	u8 *pos;
2974 	u32 tx_flags = 0;
2975 	struct ieee80211_prep_tx_info info = {
2976 		.subtype = IEEE80211_STYPE_AUTH,
2977 	};
2978 
2979 	pos = mgmt->u.auth.variable;
2980 	challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos,
2981 				       len - (pos - (u8 *)mgmt));
2982 	if (!challenge)
2983 		return;
2984 	auth_data->expected_transaction = 4;
2985 	drv_mgd_prepare_tx(sdata->local, sdata, &info);
2986 	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2987 		tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2988 			   IEEE80211_TX_INTFL_MLME_CONN_TX;
2989 	ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2990 			    (void *)challenge,
2991 			    challenge->datalen + sizeof(*challenge),
2992 			    auth_data->bss->bssid, auth_data->bss->bssid,
2993 			    auth_data->key, auth_data->key_len,
2994 			    auth_data->key_idx, tx_flags);
2995 }
2996 
ieee80211_mark_sta_auth(struct ieee80211_sub_if_data * sdata,const u8 * bssid)2997 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2998 				    const u8 *bssid)
2999 {
3000 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3001 	struct sta_info *sta;
3002 	bool result = true;
3003 
3004 	sdata_info(sdata, "authenticated\n");
3005 	ifmgd->auth_data->done = true;
3006 	ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
3007 	ifmgd->auth_data->timeout_started = true;
3008 	run_again(sdata, ifmgd->auth_data->timeout);
3009 
3010 	/* move station state to auth */
3011 	mutex_lock(&sdata->local->sta_mtx);
3012 	sta = sta_info_get(sdata, bssid);
3013 	if (!sta) {
3014 		WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
3015 		result = false;
3016 		goto out;
3017 	}
3018 	if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
3019 		sdata_info(sdata, "failed moving %pM to auth\n", bssid);
3020 		result = false;
3021 		goto out;
3022 	}
3023 
3024 out:
3025 	mutex_unlock(&sdata->local->sta_mtx);
3026 	return result;
3027 }
3028 
ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3029 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
3030 				   struct ieee80211_mgmt *mgmt, size_t len)
3031 {
3032 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3033 	u8 bssid[ETH_ALEN];
3034 	u16 auth_alg, auth_transaction, status_code;
3035 	struct ieee80211_event event = {
3036 		.type = MLME_EVENT,
3037 		.u.mlme.data = AUTH_EVENT,
3038 	};
3039 	struct ieee80211_prep_tx_info info = {
3040 		.subtype = IEEE80211_STYPE_AUTH,
3041 	};
3042 
3043 	sdata_assert_lock(sdata);
3044 
3045 	if (len < 24 + 6)
3046 		return;
3047 
3048 	if (!ifmgd->auth_data || ifmgd->auth_data->done)
3049 		return;
3050 
3051 	memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3052 
3053 	if (!ether_addr_equal(bssid, mgmt->bssid))
3054 		return;
3055 
3056 	auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
3057 	auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
3058 	status_code = le16_to_cpu(mgmt->u.auth.status_code);
3059 
3060 	if (auth_alg != ifmgd->auth_data->algorithm ||
3061 	    (auth_alg != WLAN_AUTH_SAE &&
3062 	     auth_transaction != ifmgd->auth_data->expected_transaction) ||
3063 	    (auth_alg == WLAN_AUTH_SAE &&
3064 	     (auth_transaction < ifmgd->auth_data->expected_transaction ||
3065 	      auth_transaction > 2))) {
3066 		sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
3067 			   mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
3068 			   auth_transaction,
3069 			   ifmgd->auth_data->expected_transaction);
3070 		goto notify_driver;
3071 	}
3072 
3073 	if (status_code != WLAN_STATUS_SUCCESS) {
3074 		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3075 
3076 		if (auth_alg == WLAN_AUTH_SAE &&
3077 		    (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED ||
3078 		     (auth_transaction == 1 &&
3079 		      (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
3080 		       status_code == WLAN_STATUS_SAE_PK)))) {
3081 			/* waiting for userspace now */
3082 			ifmgd->auth_data->waiting = true;
3083 			ifmgd->auth_data->timeout =
3084 				jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY;
3085 			ifmgd->auth_data->timeout_started = true;
3086 			run_again(sdata, ifmgd->auth_data->timeout);
3087 			goto notify_driver;
3088 		}
3089 
3090 		sdata_info(sdata, "%pM denied authentication (status %d)\n",
3091 			   mgmt->sa, status_code);
3092 		ieee80211_destroy_auth_data(sdata, false);
3093 		event.u.mlme.status = MLME_DENIED;
3094 		event.u.mlme.reason = status_code;
3095 		drv_event_callback(sdata->local, sdata, &event);
3096 		goto notify_driver;
3097 	}
3098 
3099 	switch (ifmgd->auth_data->algorithm) {
3100 	case WLAN_AUTH_OPEN:
3101 	case WLAN_AUTH_LEAP:
3102 	case WLAN_AUTH_FT:
3103 	case WLAN_AUTH_SAE:
3104 	case WLAN_AUTH_FILS_SK:
3105 	case WLAN_AUTH_FILS_SK_PFS:
3106 	case WLAN_AUTH_FILS_PK:
3107 		break;
3108 	case WLAN_AUTH_SHARED_KEY:
3109 		if (ifmgd->auth_data->expected_transaction != 4) {
3110 			ieee80211_auth_challenge(sdata, mgmt, len);
3111 			/* need another frame */
3112 			return;
3113 		}
3114 		break;
3115 	default:
3116 		WARN_ONCE(1, "invalid auth alg %d",
3117 			  ifmgd->auth_data->algorithm);
3118 		goto notify_driver;
3119 	}
3120 
3121 	event.u.mlme.status = MLME_SUCCESS;
3122 	info.success = 1;
3123 	drv_event_callback(sdata->local, sdata, &event);
3124 	if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
3125 	    (auth_transaction == 2 &&
3126 	     ifmgd->auth_data->expected_transaction == 2)) {
3127 		if (!ieee80211_mark_sta_auth(sdata, bssid))
3128 			return; /* ignore frame -- wait for timeout */
3129 	} else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
3130 		   auth_transaction == 2) {
3131 		sdata_info(sdata, "SAE peer confirmed\n");
3132 		ifmgd->auth_data->peer_confirmed = true;
3133 	}
3134 
3135 	cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3136 notify_driver:
3137 	drv_mgd_complete_tx(sdata->local, sdata, &info);
3138 }
3139 
3140 #define case_WLAN(type) \
3141 	case WLAN_REASON_##type: return #type
3142 
ieee80211_get_reason_code_string(u16 reason_code)3143 const char *ieee80211_get_reason_code_string(u16 reason_code)
3144 {
3145 	switch (reason_code) {
3146 	case_WLAN(UNSPECIFIED);
3147 	case_WLAN(PREV_AUTH_NOT_VALID);
3148 	case_WLAN(DEAUTH_LEAVING);
3149 	case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
3150 	case_WLAN(DISASSOC_AP_BUSY);
3151 	case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
3152 	case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
3153 	case_WLAN(DISASSOC_STA_HAS_LEFT);
3154 	case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
3155 	case_WLAN(DISASSOC_BAD_POWER);
3156 	case_WLAN(DISASSOC_BAD_SUPP_CHAN);
3157 	case_WLAN(INVALID_IE);
3158 	case_WLAN(MIC_FAILURE);
3159 	case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
3160 	case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
3161 	case_WLAN(IE_DIFFERENT);
3162 	case_WLAN(INVALID_GROUP_CIPHER);
3163 	case_WLAN(INVALID_PAIRWISE_CIPHER);
3164 	case_WLAN(INVALID_AKMP);
3165 	case_WLAN(UNSUPP_RSN_VERSION);
3166 	case_WLAN(INVALID_RSN_IE_CAP);
3167 	case_WLAN(IEEE8021X_FAILED);
3168 	case_WLAN(CIPHER_SUITE_REJECTED);
3169 	case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3170 	case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3171 	case_WLAN(DISASSOC_LOW_ACK);
3172 	case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3173 	case_WLAN(QSTA_LEAVE_QBSS);
3174 	case_WLAN(QSTA_NOT_USE);
3175 	case_WLAN(QSTA_REQUIRE_SETUP);
3176 	case_WLAN(QSTA_TIMEOUT);
3177 	case_WLAN(QSTA_CIPHER_NOT_SUPP);
3178 	case_WLAN(MESH_PEER_CANCELED);
3179 	case_WLAN(MESH_MAX_PEERS);
3180 	case_WLAN(MESH_CONFIG);
3181 	case_WLAN(MESH_CLOSE);
3182 	case_WLAN(MESH_MAX_RETRIES);
3183 	case_WLAN(MESH_CONFIRM_TIMEOUT);
3184 	case_WLAN(MESH_INVALID_GTK);
3185 	case_WLAN(MESH_INCONSISTENT_PARAM);
3186 	case_WLAN(MESH_INVALID_SECURITY);
3187 	case_WLAN(MESH_PATH_ERROR);
3188 	case_WLAN(MESH_PATH_NOFORWARD);
3189 	case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3190 	case_WLAN(MAC_EXISTS_IN_MBSS);
3191 	case_WLAN(MESH_CHAN_REGULATORY);
3192 	case_WLAN(MESH_CHAN);
3193 	default: return "<unknown>";
3194 	}
3195 }
3196 
ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3197 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3198 				     struct ieee80211_mgmt *mgmt, size_t len)
3199 {
3200 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3201 	u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3202 
3203 	sdata_assert_lock(sdata);
3204 
3205 	if (len < 24 + 2)
3206 		return;
3207 
3208 	if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3209 		ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3210 		return;
3211 	}
3212 
3213 	if (ifmgd->associated &&
3214 	    ether_addr_equal(mgmt->bssid, ifmgd->bssid)) {
3215 		const u8 *bssid = ifmgd->bssid;
3216 
3217 		sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3218 			   bssid, reason_code,
3219 			   ieee80211_get_reason_code_string(reason_code));
3220 
3221 		ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3222 
3223 		ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3224 					    reason_code, false);
3225 		return;
3226 	}
3227 
3228 	if (ifmgd->assoc_data &&
3229 	    ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3230 		const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3231 
3232 		sdata_info(sdata,
3233 			   "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3234 			   bssid, reason_code,
3235 			   ieee80211_get_reason_code_string(reason_code));
3236 
3237 		ieee80211_destroy_assoc_data(sdata, false, true);
3238 
3239 		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3240 		return;
3241 	}
3242 }
3243 
3244 
ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3245 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3246 				       struct ieee80211_mgmt *mgmt, size_t len)
3247 {
3248 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3249 	u16 reason_code;
3250 
3251 	sdata_assert_lock(sdata);
3252 
3253 	if (len < 24 + 2)
3254 		return;
3255 
3256 	if (!ifmgd->associated ||
3257 	    !ether_addr_equal(mgmt->bssid, ifmgd->bssid))
3258 		return;
3259 
3260 	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3261 
3262 	if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3263 		ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3264 		return;
3265 	}
3266 
3267 	sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3268 		   mgmt->sa, reason_code,
3269 		   ieee80211_get_reason_code_string(reason_code));
3270 
3271 	ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3272 
3273 	ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code,
3274 				    false);
3275 }
3276 
ieee80211_get_rates(struct ieee80211_supported_band * sband,u8 * supp_rates,unsigned int supp_rates_len,u32 * rates,u32 * basic_rates,bool * have_higher_than_11mbit,int * min_rate,int * min_rate_index,int shift)3277 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3278 				u8 *supp_rates, unsigned int supp_rates_len,
3279 				u32 *rates, u32 *basic_rates,
3280 				bool *have_higher_than_11mbit,
3281 				int *min_rate, int *min_rate_index,
3282 				int shift)
3283 {
3284 	int i, j;
3285 
3286 	for (i = 0; i < supp_rates_len; i++) {
3287 		int rate = supp_rates[i] & 0x7f;
3288 		bool is_basic = !!(supp_rates[i] & 0x80);
3289 
3290 		if ((rate * 5 * (1 << shift)) > 110)
3291 			*have_higher_than_11mbit = true;
3292 
3293 		/*
3294 		 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors
3295 		 * since they're not rates.
3296 		 *
3297 		 * Note: Even though the membership selector and the basic
3298 		 *	 rate flag share the same bit, they are not exactly
3299 		 *	 the same.
3300 		 */
3301 		if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3302 		    supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
3303 		    supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) ||
3304 		    supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E))
3305 			continue;
3306 
3307 		for (j = 0; j < sband->n_bitrates; j++) {
3308 			struct ieee80211_rate *br;
3309 			int brate;
3310 
3311 			br = &sband->bitrates[j];
3312 
3313 			brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3314 			if (brate == rate) {
3315 				*rates |= BIT(j);
3316 				if (is_basic)
3317 					*basic_rates |= BIT(j);
3318 				if ((rate * 5) < *min_rate) {
3319 					*min_rate = rate * 5;
3320 					*min_rate_index = j;
3321 				}
3322 				break;
3323 			}
3324 		}
3325 	}
3326 }
3327 
ieee80211_twt_req_supported(const struct sta_info * sta,const struct ieee802_11_elems * elems)3328 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3329 					const struct ieee802_11_elems *elems)
3330 {
3331 	if (elems->ext_capab_len < 10)
3332 		return false;
3333 
3334 	if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3335 		return false;
3336 
3337 	return sta->sta.deflink.he_cap.he_cap_elem.mac_cap_info[0] &
3338 		IEEE80211_HE_MAC_CAP0_TWT_RES;
3339 }
3340 
ieee80211_recalc_twt_req(struct ieee80211_sub_if_data * sdata,struct sta_info * sta,struct ieee802_11_elems * elems)3341 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3342 				    struct sta_info *sta,
3343 				    struct ieee802_11_elems *elems)
3344 {
3345 	bool twt = ieee80211_twt_req_supported(sta, elems);
3346 
3347 	if (sdata->vif.bss_conf.twt_requester != twt) {
3348 		sdata->vif.bss_conf.twt_requester = twt;
3349 		return BSS_CHANGED_TWT;
3350 	}
3351 	return 0;
3352 }
3353 
ieee80211_twt_bcast_support(struct ieee80211_sub_if_data * sdata,struct ieee80211_bss_conf * bss_conf,struct ieee80211_supported_band * sband,struct sta_info * sta)3354 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata,
3355 					struct ieee80211_bss_conf *bss_conf,
3356 					struct ieee80211_supported_band *sband,
3357 					struct sta_info *sta)
3358 {
3359 	const struct ieee80211_sta_he_cap *own_he_cap =
3360 		ieee80211_get_he_iftype_cap(sband,
3361 					    ieee80211_vif_type_p2p(&sdata->vif));
3362 
3363 	return bss_conf->he_support &&
3364 		(sta->sta.deflink.he_cap.he_cap_elem.mac_cap_info[2] &
3365 			IEEE80211_HE_MAC_CAP2_BCAST_TWT) &&
3366 		own_he_cap &&
3367 		(own_he_cap->he_cap_elem.mac_cap_info[2] &
3368 			IEEE80211_HE_MAC_CAP2_BCAST_TWT);
3369 }
3370 
ieee80211_assoc_success(struct ieee80211_sub_if_data * sdata,struct cfg80211_bss * cbss,struct ieee80211_mgmt * mgmt,size_t len,struct ieee802_11_elems * elems)3371 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3372 				    struct cfg80211_bss *cbss,
3373 				    struct ieee80211_mgmt *mgmt, size_t len,
3374 				    struct ieee802_11_elems *elems)
3375 {
3376 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3377 	struct ieee80211_local *local = sdata->local;
3378 	struct ieee80211_supported_band *sband;
3379 	struct sta_info *sta;
3380 	u16 capab_info, aid;
3381 	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3382 	const struct cfg80211_bss_ies *bss_ies = NULL;
3383 	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3384 	bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
3385 	bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
3386 	u32 changed = 0;
3387 	u8 *pos;
3388 	int err;
3389 	bool ret;
3390 
3391 	/* AssocResp and ReassocResp have identical structure */
3392 
3393 	pos = mgmt->u.assoc_resp.variable;
3394 	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3395 	if (is_s1g) {
3396 		pos = (u8 *) mgmt->u.s1g_assoc_resp.variable;
3397 		aid = 0; /* TODO */
3398 	}
3399 	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3400 	elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false,
3401 				       mgmt->bssid, assoc_data->bss->bssid);
3402 
3403 	if (!elems)
3404 		return false;
3405 
3406 	if (elems->aid_resp)
3407 		aid = le16_to_cpu(elems->aid_resp->aid);
3408 
3409 	/*
3410 	 * The 5 MSB of the AID field are reserved
3411 	 * (802.11-2016 9.4.1.8 AID field)
3412 	 */
3413 	aid &= 0x7ff;
3414 
3415 	ifmgd->broken_ap = false;
3416 
3417 	if (aid == 0 || aid > IEEE80211_MAX_AID) {
3418 		sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3419 			   aid);
3420 		aid = 0;
3421 		ifmgd->broken_ap = true;
3422 	}
3423 
3424 	if (!is_s1g && !elems->supp_rates) {
3425 		sdata_info(sdata, "no SuppRates element in AssocResp\n");
3426 		ret = false;
3427 		goto out;
3428 	}
3429 
3430 	sdata->vif.bss_conf.aid = aid;
3431 	ifmgd->tdls_chan_switch_prohibited =
3432 		elems->ext_capab && elems->ext_capab_len >= 5 &&
3433 		(elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3434 
3435 	/*
3436 	 * Some APs are erroneously not including some information in their
3437 	 * (re)association response frames. Try to recover by using the data
3438 	 * from the beacon or probe response. This seems to afflict mobile
3439 	 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3440 	 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3441 	 */
3442 	if (!is_6ghz &&
3443 	    ((assoc_data->wmm && !elems->wmm_param) ||
3444 	     (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3445 	      (!elems->ht_cap_elem || !elems->ht_operation)) ||
3446 	     (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3447 	      (!elems->vht_cap_elem || !elems->vht_operation)))) {
3448 		const struct cfg80211_bss_ies *ies;
3449 		struct ieee802_11_elems *bss_elems;
3450 
3451 		rcu_read_lock();
3452 		ies = rcu_dereference(cbss->ies);
3453 		if (ies)
3454 			bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3455 					  GFP_ATOMIC);
3456 		rcu_read_unlock();
3457 		if (!bss_ies) {
3458 			ret = false;
3459 			goto out;
3460 		}
3461 
3462 		bss_elems = ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3463 						   false, mgmt->bssid,
3464 						   assoc_data->bss->bssid);
3465 		if (!bss_elems) {
3466 			ret = false;
3467 			goto out;
3468 		}
3469 
3470 		if (assoc_data->wmm &&
3471 		    !elems->wmm_param && bss_elems->wmm_param) {
3472 			elems->wmm_param = bss_elems->wmm_param;
3473 			sdata_info(sdata,
3474 				   "AP bug: WMM param missing from AssocResp\n");
3475 		}
3476 
3477 		/*
3478 		 * Also check if we requested HT/VHT, otherwise the AP doesn't
3479 		 * have to include the IEs in the (re)association response.
3480 		 */
3481 		if (!elems->ht_cap_elem && bss_elems->ht_cap_elem &&
3482 		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3483 			elems->ht_cap_elem = bss_elems->ht_cap_elem;
3484 			sdata_info(sdata,
3485 				   "AP bug: HT capability missing from AssocResp\n");
3486 		}
3487 		if (!elems->ht_operation && bss_elems->ht_operation &&
3488 		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3489 			elems->ht_operation = bss_elems->ht_operation;
3490 			sdata_info(sdata,
3491 				   "AP bug: HT operation missing from AssocResp\n");
3492 		}
3493 		if (!elems->vht_cap_elem && bss_elems->vht_cap_elem &&
3494 		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3495 			elems->vht_cap_elem = bss_elems->vht_cap_elem;
3496 			sdata_info(sdata,
3497 				   "AP bug: VHT capa missing from AssocResp\n");
3498 		}
3499 		if (!elems->vht_operation && bss_elems->vht_operation &&
3500 		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3501 			elems->vht_operation = bss_elems->vht_operation;
3502 			sdata_info(sdata,
3503 				   "AP bug: VHT operation missing from AssocResp\n");
3504 		}
3505 
3506 		kfree(bss_elems);
3507 	}
3508 
3509 	/*
3510 	 * We previously checked these in the beacon/probe response, so
3511 	 * they should be present here. This is just a safety net.
3512 	 */
3513 	if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3514 	    (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
3515 		sdata_info(sdata,
3516 			   "HT AP is missing WMM params or HT capability/operation\n");
3517 		ret = false;
3518 		goto out;
3519 	}
3520 
3521 	if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3522 	    (!elems->vht_cap_elem || !elems->vht_operation)) {
3523 		sdata_info(sdata,
3524 			   "VHT AP is missing VHT capability/operation\n");
3525 		ret = false;
3526 		goto out;
3527 	}
3528 
3529 	if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3530 	    !elems->he_6ghz_capa) {
3531 		sdata_info(sdata,
3532 			   "HE 6 GHz AP is missing HE 6 GHz band capability\n");
3533 		ret = false;
3534 		goto out;
3535 	}
3536 
3537 	mutex_lock(&sdata->local->sta_mtx);
3538 	/*
3539 	 * station info was already allocated and inserted before
3540 	 * the association and should be available to us
3541 	 */
3542 	sta = sta_info_get(sdata, cbss->bssid);
3543 	if (WARN_ON(!sta)) {
3544 		mutex_unlock(&sdata->local->sta_mtx);
3545 		ret = false;
3546 		goto out;
3547 	}
3548 
3549 	sband = ieee80211_get_sband(sdata);
3550 	if (!sband) {
3551 		mutex_unlock(&sdata->local->sta_mtx);
3552 		ret = false;
3553 		goto out;
3554 	}
3555 
3556 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3557 	    (!elems->he_cap || !elems->he_operation)) {
3558 		mutex_unlock(&sdata->local->sta_mtx);
3559 		sdata_info(sdata,
3560 			   "HE AP is missing HE capability/operation\n");
3561 		ret = false;
3562 		goto out;
3563 	}
3564 
3565 	/* Set up internal HT/VHT capabilities */
3566 	if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3567 		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3568 						  elems->ht_cap_elem, sta);
3569 
3570 	if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3571 		ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3572 						    elems->vht_cap_elem, sta);
3573 
3574 	if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3575 	    elems->he_cap) {
3576 		ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3577 						  elems->he_cap,
3578 						  elems->he_cap_len,
3579 						  elems->he_6ghz_capa,
3580 						  sta);
3581 
3582 		bss_conf->he_support = sta->sta.deflink.he_cap.has_he;
3583 		if (elems->rsnx && elems->rsnx_len &&
3584 		    (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
3585 		    wiphy_ext_feature_isset(local->hw.wiphy,
3586 					    NL80211_EXT_FEATURE_PROTECTED_TWT))
3587 			bss_conf->twt_protected = true;
3588 		else
3589 			bss_conf->twt_protected = false;
3590 
3591 		changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
3592 
3593 		if (elems->eht_operation && elems->eht_cap &&
3594 		    !(ifmgd->flags & IEEE80211_STA_DISABLE_EHT)) {
3595 			ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
3596 							    elems->he_cap,
3597 							    elems->he_cap_len,
3598 							    elems->eht_cap,
3599 							    elems->eht_cap_len,
3600 							    sta);
3601 
3602 			bss_conf->eht_support = sta->sta.deflink.eht_cap.has_eht;
3603 		} else {
3604 			bss_conf->eht_support = false;
3605 		}
3606 	} else {
3607 		bss_conf->he_support = false;
3608 		bss_conf->twt_requester = false;
3609 		bss_conf->twt_protected = false;
3610 		bss_conf->eht_support = false;
3611 	}
3612 
3613 	bss_conf->twt_broadcast =
3614 		ieee80211_twt_bcast_support(sdata, bss_conf, sband, sta);
3615 
3616 	if (bss_conf->he_support) {
3617 		bss_conf->he_bss_color.color =
3618 			le32_get_bits(elems->he_operation->he_oper_params,
3619 				      IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3620 		bss_conf->he_bss_color.partial =
3621 			le32_get_bits(elems->he_operation->he_oper_params,
3622 				      IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
3623 		bss_conf->he_bss_color.enabled =
3624 			!le32_get_bits(elems->he_operation->he_oper_params,
3625 				       IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3626 
3627 		if (bss_conf->he_bss_color.enabled)
3628 			changed |= BSS_CHANGED_HE_BSS_COLOR;
3629 
3630 		bss_conf->htc_trig_based_pkt_ext =
3631 			le32_get_bits(elems->he_operation->he_oper_params,
3632 			      IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3633 		bss_conf->frame_time_rts_th =
3634 			le32_get_bits(elems->he_operation->he_oper_params,
3635 			      IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3636 
3637 		bss_conf->uora_exists = !!elems->uora_element;
3638 		if (elems->uora_element)
3639 			bss_conf->uora_ocw_range = elems->uora_element[0];
3640 
3641 		ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
3642 		ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
3643 		/* TODO: OPEN: what happens if BSS color disable is set? */
3644 	}
3645 
3646 	if (cbss->transmitted_bss) {
3647 		bss_conf->nontransmitted = true;
3648 		ether_addr_copy(bss_conf->transmitter_bssid,
3649 				cbss->transmitted_bss->bssid);
3650 		bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3651 		bss_conf->bssid_index = cbss->bssid_index;
3652 	} else {
3653 		bss_conf->nontransmitted = false;
3654 		memset(bss_conf->transmitter_bssid, 0,
3655 		       sizeof(bss_conf->transmitter_bssid));
3656 		bss_conf->bssid_indicator = 0;
3657 		bss_conf->bssid_index = 0;
3658 	}
3659 
3660 	/*
3661 	 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3662 	 * in their association response, so ignore that data for our own
3663 	 * configuration. If it changed since the last beacon, we'll get the
3664 	 * next beacon and update then.
3665 	 */
3666 
3667 	/*
3668 	 * If an operating mode notification IE is present, override the
3669 	 * NSS calculation (that would be done in rate_control_rate_init())
3670 	 * and use the # of streams from that element.
3671 	 */
3672 	if (elems->opmode_notif &&
3673 	    !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3674 		u8 nss;
3675 
3676 		nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3677 		nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3678 		nss += 1;
3679 		sta->sta.deflink.rx_nss = nss;
3680 	}
3681 
3682 	rate_control_rate_init(sta);
3683 
3684 	if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3685 		set_sta_flag(sta, WLAN_STA_MFP);
3686 		sta->sta.mfp = true;
3687 	} else {
3688 		sta->sta.mfp = false;
3689 	}
3690 
3691 	sta->sta.wme = (elems->wmm_param || elems->s1g_capab) &&
3692 		       local->hw.queues >= IEEE80211_NUM_ACS;
3693 
3694 	err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3695 	if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3696 		err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3697 	if (err) {
3698 		sdata_info(sdata,
3699 			   "failed to move station %pM to desired state\n",
3700 			   sta->sta.addr);
3701 		WARN_ON(__sta_info_destroy(sta));
3702 		mutex_unlock(&sdata->local->sta_mtx);
3703 		ret = false;
3704 		goto out;
3705 	}
3706 
3707 	if (sdata->wdev.use_4addr)
3708 		drv_sta_set_4addr(local, sdata, &sta->sta, true);
3709 
3710 	mutex_unlock(&sdata->local->sta_mtx);
3711 
3712 	/*
3713 	 * Always handle WMM once after association regardless
3714 	 * of the first value the AP uses. Setting -1 here has
3715 	 * that effect because the AP values is an unsigned
3716 	 * 4-bit value.
3717 	 */
3718 	ifmgd->wmm_last_param_set = -1;
3719 	ifmgd->mu_edca_last_param_set = -1;
3720 
3721 	if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3722 		ieee80211_set_wmm_default(sdata, false, false);
3723 	} else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param,
3724 					     elems->wmm_param_len,
3725 					     elems->mu_edca_param_set)) {
3726 		/* still enable QoS since we might have HT/VHT */
3727 		ieee80211_set_wmm_default(sdata, false, true);
3728 		/* set the disable-WMM flag in this case to disable
3729 		 * tracking WMM parameter changes in the beacon if
3730 		 * the parameters weren't actually valid. Doing so
3731 		 * avoids changing parameters very strangely when
3732 		 * the AP is going back and forth between valid and
3733 		 * invalid parameters.
3734 		 */
3735 		ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3736 	}
3737 	changed |= BSS_CHANGED_QOS;
3738 
3739 	if (elems->max_idle_period_ie) {
3740 		bss_conf->max_idle_period =
3741 			le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
3742 		bss_conf->protected_keep_alive =
3743 			!!(elems->max_idle_period_ie->idle_options &
3744 			   WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3745 		changed |= BSS_CHANGED_KEEP_ALIVE;
3746 	} else {
3747 		bss_conf->max_idle_period = 0;
3748 		bss_conf->protected_keep_alive = false;
3749 	}
3750 
3751 	/* set assoc capability (AID was already set earlier),
3752 	 * ieee80211_set_associated() will tell the driver */
3753 	bss_conf->assoc_capability = capab_info;
3754 	ieee80211_set_associated(sdata, cbss, changed);
3755 
3756 	/*
3757 	 * If we're using 4-addr mode, let the AP know that we're
3758 	 * doing so, so that it can create the STA VLAN on its side
3759 	 */
3760 	if (ifmgd->use_4addr)
3761 		ieee80211_send_4addr_nullfunc(local, sdata);
3762 
3763 	/*
3764 	 * Start timer to probe the connection to the AP now.
3765 	 * Also start the timer that will detect beacon loss.
3766 	 */
3767 	ieee80211_sta_reset_beacon_monitor(sdata);
3768 	ieee80211_sta_reset_conn_monitor(sdata);
3769 
3770 	ret = true;
3771  out:
3772 	kfree(elems);
3773 	kfree(bss_ies);
3774 	return ret;
3775 }
3776 
ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3777 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3778 					 struct ieee80211_mgmt *mgmt,
3779 					 size_t len)
3780 {
3781 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3782 	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3783 	u16 capab_info, status_code, aid;
3784 	struct ieee802_11_elems *elems;
3785 	int ac, uapsd_queues = -1;
3786 	u8 *pos;
3787 	bool reassoc;
3788 	struct cfg80211_bss *cbss;
3789 	struct ieee80211_event event = {
3790 		.type = MLME_EVENT,
3791 		.u.mlme.data = ASSOC_EVENT,
3792 	};
3793 	struct ieee80211_prep_tx_info info = {};
3794 
3795 	sdata_assert_lock(sdata);
3796 
3797 	if (!assoc_data)
3798 		return;
3799 
3800 	if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3801 		return;
3802 
3803 	cbss = assoc_data->bss;
3804 
3805 	/*
3806 	 * AssocResp and ReassocResp have identical structure, so process both
3807 	 * of them in this function.
3808 	 */
3809 
3810 	if (len < 24 + 6)
3811 		return;
3812 
3813 	reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3814 	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3815 	status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3816 	pos = mgmt->u.assoc_resp.variable;
3817 	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3818 	if (cbss->channel->band == NL80211_BAND_S1GHZ) {
3819 		pos = (u8 *) mgmt->u.s1g_assoc_resp.variable;
3820 		aid = 0; /* TODO */
3821 	}
3822 
3823 	/*
3824 	 * Note: this may not be perfect, AP might misbehave - if
3825 	 * anyone needs to rely on perfect complete notification
3826 	 * with the exact right subtype, then we need to track what
3827 	 * we actually transmitted.
3828 	 */
3829 	info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ :
3830 				 IEEE80211_STYPE_ASSOC_REQ;
3831 
3832 	sdata_info(sdata,
3833 		   "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3834 		   reassoc ? "Rea" : "A", mgmt->sa,
3835 		   capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3836 
3837 	if (assoc_data->fils_kek_len &&
3838 	    fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3839 		return;
3840 
3841 	elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false,
3842 				       mgmt->bssid, assoc_data->bss->bssid);
3843 	if (!elems)
3844 		goto notify_driver;
3845 
3846 	if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3847 	    elems->timeout_int &&
3848 	    elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3849 		u32 tu, ms;
3850 
3851 		cfg80211_assoc_comeback(sdata->dev, assoc_data->bss,
3852 					le32_to_cpu(elems->timeout_int->value));
3853 
3854 		tu = le32_to_cpu(elems->timeout_int->value);
3855 		ms = tu * 1024 / 1000;
3856 		sdata_info(sdata,
3857 			   "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3858 			   mgmt->sa, tu, ms);
3859 		assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3860 		assoc_data->timeout_started = true;
3861 		if (ms > IEEE80211_ASSOC_TIMEOUT)
3862 			run_again(sdata, assoc_data->timeout);
3863 		goto notify_driver;
3864 	}
3865 
3866 	if (status_code != WLAN_STATUS_SUCCESS) {
3867 		sdata_info(sdata, "%pM denied association (code=%d)\n",
3868 			   mgmt->sa, status_code);
3869 		ieee80211_destroy_assoc_data(sdata, false, false);
3870 		event.u.mlme.status = MLME_DENIED;
3871 		event.u.mlme.reason = status_code;
3872 		drv_event_callback(sdata->local, sdata, &event);
3873 	} else {
3874 		if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, elems)) {
3875 			/* oops -- internal error -- send timeout for now */
3876 			ieee80211_destroy_assoc_data(sdata, false, false);
3877 			cfg80211_assoc_timeout(sdata->dev, cbss);
3878 			goto notify_driver;
3879 		}
3880 		event.u.mlme.status = MLME_SUCCESS;
3881 		drv_event_callback(sdata->local, sdata, &event);
3882 		sdata_info(sdata, "associated\n");
3883 
3884 		/*
3885 		 * destroy assoc_data afterwards, as otherwise an idle
3886 		 * recalc after assoc_data is NULL but before associated
3887 		 * is set can cause the interface to go idle
3888 		 */
3889 		ieee80211_destroy_assoc_data(sdata, true, false);
3890 
3891 		/* get uapsd queues configuration */
3892 		uapsd_queues = 0;
3893 		for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3894 			if (sdata->tx_conf[ac].uapsd)
3895 				uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3896 
3897 		info.success = 1;
3898 	}
3899 
3900 	cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues,
3901 			       ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3902 notify_driver:
3903 	drv_mgd_complete_tx(sdata->local, sdata, &info);
3904 	kfree(elems);
3905 }
3906 
ieee80211_rx_bss_info(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len,struct ieee80211_rx_status * rx_status)3907 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3908 				  struct ieee80211_mgmt *mgmt, size_t len,
3909 				  struct ieee80211_rx_status *rx_status)
3910 {
3911 	struct ieee80211_local *local = sdata->local;
3912 	struct ieee80211_bss *bss;
3913 	struct ieee80211_channel *channel;
3914 
3915 	sdata_assert_lock(sdata);
3916 
3917 	channel = ieee80211_get_channel_khz(local->hw.wiphy,
3918 					ieee80211_rx_status_to_khz(rx_status));
3919 	if (!channel)
3920 		return;
3921 
3922 	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3923 	if (bss) {
3924 		sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3925 		ieee80211_rx_bss_put(local, bss);
3926 	}
3927 }
3928 
3929 
ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)3930 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3931 					 struct sk_buff *skb)
3932 {
3933 	struct ieee80211_mgmt *mgmt = (void *)skb->data;
3934 	struct ieee80211_if_managed *ifmgd;
3935 	struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3936 	struct ieee80211_channel *channel;
3937 	size_t baselen, len = skb->len;
3938 
3939 	ifmgd = &sdata->u.mgd;
3940 
3941 	sdata_assert_lock(sdata);
3942 
3943 	/*
3944 	 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
3945 	 * "If a 6 GHz AP receives a Probe Request frame  and responds with
3946 	 * a Probe Response frame [..], the Address 1 field of the Probe
3947 	 * Response frame shall be set to the broadcast address [..]"
3948 	 * So, on 6GHz band we should also accept broadcast responses.
3949 	 */
3950 	channel = ieee80211_get_channel(sdata->local->hw.wiphy,
3951 					rx_status->freq);
3952 	if (!channel)
3953 		return;
3954 
3955 	if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
3956 	    (channel->band != NL80211_BAND_6GHZ ||
3957 	     !is_broadcast_ether_addr(mgmt->da)))
3958 		return; /* ignore ProbeResp to foreign address */
3959 
3960 	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3961 	if (baselen > len)
3962 		return;
3963 
3964 	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3965 
3966 	if (ifmgd->associated &&
3967 	    ether_addr_equal(mgmt->bssid, ifmgd->bssid))
3968 		ieee80211_reset_ap_probe(sdata);
3969 }
3970 
3971 /*
3972  * This is the canonical list of information elements we care about,
3973  * the filter code also gives us all changes to the Microsoft OUI
3974  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3975  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3976  * changes to requested client power.
3977  *
3978  * We implement beacon filtering in software since that means we can
3979  * avoid processing the frame here and in cfg80211, and userspace
3980  * will not be able to tell whether the hardware supports it or not.
3981  *
3982  * XXX: This list needs to be dynamic -- userspace needs to be able to
3983  *	add items it requires. It also needs to be able to tell us to
3984  *	look out for other vendor IEs.
3985  */
3986 static const u64 care_about_ies =
3987 	(1ULL << WLAN_EID_COUNTRY) |
3988 	(1ULL << WLAN_EID_ERP_INFO) |
3989 	(1ULL << WLAN_EID_CHANNEL_SWITCH) |
3990 	(1ULL << WLAN_EID_PWR_CONSTRAINT) |
3991 	(1ULL << WLAN_EID_HT_CAPABILITY) |
3992 	(1ULL << WLAN_EID_HT_OPERATION) |
3993 	(1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3994 
ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data * sdata,struct ieee80211_if_managed * ifmgd,struct ieee80211_bss_conf * bss_conf,struct ieee80211_local * local,struct ieee80211_rx_status * rx_status)3995 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3996 					struct ieee80211_if_managed *ifmgd,
3997 					struct ieee80211_bss_conf *bss_conf,
3998 					struct ieee80211_local *local,
3999 					struct ieee80211_rx_status *rx_status)
4000 {
4001 	/* Track average RSSI from the Beacon frames of the current AP */
4002 
4003 	if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
4004 		ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
4005 		ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
4006 		ifmgd->last_cqm_event_signal = 0;
4007 		ifmgd->count_beacon_signal = 1;
4008 		ifmgd->last_ave_beacon_signal = 0;
4009 	} else {
4010 		ifmgd->count_beacon_signal++;
4011 	}
4012 
4013 	ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
4014 
4015 	if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
4016 	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
4017 		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
4018 		int last_sig = ifmgd->last_ave_beacon_signal;
4019 		struct ieee80211_event event = {
4020 			.type = RSSI_EVENT,
4021 		};
4022 
4023 		/*
4024 		 * if signal crosses either of the boundaries, invoke callback
4025 		 * with appropriate parameters
4026 		 */
4027 		if (sig > ifmgd->rssi_max_thold &&
4028 		    (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
4029 			ifmgd->last_ave_beacon_signal = sig;
4030 			event.u.rssi.data = RSSI_EVENT_HIGH;
4031 			drv_event_callback(local, sdata, &event);
4032 		} else if (sig < ifmgd->rssi_min_thold &&
4033 			   (last_sig >= ifmgd->rssi_max_thold ||
4034 			   last_sig == 0)) {
4035 			ifmgd->last_ave_beacon_signal = sig;
4036 			event.u.rssi.data = RSSI_EVENT_LOW;
4037 			drv_event_callback(local, sdata, &event);
4038 		}
4039 	}
4040 
4041 	if (bss_conf->cqm_rssi_thold &&
4042 	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
4043 	    !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
4044 		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
4045 		int last_event = ifmgd->last_cqm_event_signal;
4046 		int thold = bss_conf->cqm_rssi_thold;
4047 		int hyst = bss_conf->cqm_rssi_hyst;
4048 
4049 		if (sig < thold &&
4050 		    (last_event == 0 || sig < last_event - hyst)) {
4051 			ifmgd->last_cqm_event_signal = sig;
4052 			ieee80211_cqm_rssi_notify(
4053 				&sdata->vif,
4054 				NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
4055 				sig, GFP_KERNEL);
4056 		} else if (sig > thold &&
4057 			   (last_event == 0 || sig > last_event + hyst)) {
4058 			ifmgd->last_cqm_event_signal = sig;
4059 			ieee80211_cqm_rssi_notify(
4060 				&sdata->vif,
4061 				NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
4062 				sig, GFP_KERNEL);
4063 		}
4064 	}
4065 
4066 	if (bss_conf->cqm_rssi_low &&
4067 	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
4068 		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
4069 		int last_event = ifmgd->last_cqm_event_signal;
4070 		int low = bss_conf->cqm_rssi_low;
4071 		int high = bss_conf->cqm_rssi_high;
4072 
4073 		if (sig < low &&
4074 		    (last_event == 0 || last_event >= low)) {
4075 			ifmgd->last_cqm_event_signal = sig;
4076 			ieee80211_cqm_rssi_notify(
4077 				&sdata->vif,
4078 				NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
4079 				sig, GFP_KERNEL);
4080 		} else if (sig > high &&
4081 			   (last_event == 0 || last_event <= high)) {
4082 			ifmgd->last_cqm_event_signal = sig;
4083 			ieee80211_cqm_rssi_notify(
4084 				&sdata->vif,
4085 				NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
4086 				sig, GFP_KERNEL);
4087 		}
4088 	}
4089 }
4090 
ieee80211_rx_our_beacon(const u8 * tx_bssid,struct cfg80211_bss * bss)4091 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
4092 				    struct cfg80211_bss *bss)
4093 {
4094 	if (ether_addr_equal(tx_bssid, bss->bssid))
4095 		return true;
4096 	if (!bss->transmitted_bss)
4097 		return false;
4098 	return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
4099 }
4100 
ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data * sdata,struct ieee80211_hdr * hdr,size_t len,struct ieee80211_rx_status * rx_status)4101 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
4102 				     struct ieee80211_hdr *hdr, size_t len,
4103 				     struct ieee80211_rx_status *rx_status)
4104 {
4105 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4106 	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
4107 	struct ieee80211_mgmt *mgmt = (void *) hdr;
4108 	size_t baselen;
4109 	struct ieee802_11_elems *elems;
4110 	struct ieee80211_local *local = sdata->local;
4111 	struct ieee80211_chanctx_conf *chanctx_conf;
4112 	struct ieee80211_channel *chan;
4113 	struct sta_info *sta;
4114 	u32 changed = 0;
4115 	bool erp_valid;
4116 	u8 erp_value = 0;
4117 	u32 ncrc = 0;
4118 	u8 *bssid, *variable = mgmt->u.beacon.variable;
4119 	u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
4120 
4121 	sdata_assert_lock(sdata);
4122 
4123 	/* Process beacon from the current BSS */
4124 	bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type);
4125 	if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
4126 		struct ieee80211_ext *ext = (void *) mgmt;
4127 
4128 		if (ieee80211_is_s1g_short_beacon(ext->frame_control))
4129 			variable = ext->u.s1g_short_beacon.variable;
4130 		else
4131 			variable = ext->u.s1g_beacon.variable;
4132 	}
4133 
4134 	baselen = (u8 *) variable - (u8 *) mgmt;
4135 	if (baselen > len)
4136 		return;
4137 
4138 	rcu_read_lock();
4139 	chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
4140 	if (!chanctx_conf) {
4141 		rcu_read_unlock();
4142 		return;
4143 	}
4144 
4145 	if (ieee80211_rx_status_to_khz(rx_status) !=
4146 	    ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
4147 		rcu_read_unlock();
4148 		return;
4149 	}
4150 	chan = chanctx_conf->def.chan;
4151 	rcu_read_unlock();
4152 
4153 	if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
4154 	    ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) {
4155 		elems = ieee802_11_parse_elems(variable, len - baselen, false,
4156 					       bssid,
4157 					       ifmgd->assoc_data->bss->bssid);
4158 		if (!elems)
4159 			return;
4160 
4161 		ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
4162 
4163 		if (elems->dtim_period)
4164 			ifmgd->dtim_period = elems->dtim_period;
4165 		ifmgd->have_beacon = true;
4166 		ifmgd->assoc_data->need_beacon = false;
4167 		if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4168 			sdata->vif.bss_conf.sync_tsf =
4169 				le64_to_cpu(mgmt->u.beacon.timestamp);
4170 			sdata->vif.bss_conf.sync_device_ts =
4171 				rx_status->device_timestamp;
4172 			sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count;
4173 		}
4174 
4175 		if (elems->mbssid_config_ie)
4176 			bss_conf->profile_periodicity =
4177 				elems->mbssid_config_ie->profile_periodicity;
4178 		else
4179 			bss_conf->profile_periodicity = 0;
4180 
4181 		if (elems->ext_capab_len >= 11 &&
4182 		    (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
4183 			bss_conf->ema_ap = true;
4184 		else
4185 			bss_conf->ema_ap = false;
4186 
4187 		/* continue assoc process */
4188 		ifmgd->assoc_data->timeout = jiffies;
4189 		ifmgd->assoc_data->timeout_started = true;
4190 		run_again(sdata, ifmgd->assoc_data->timeout);
4191 		kfree(elems);
4192 		return;
4193 	}
4194 
4195 	if (!ifmgd->associated ||
4196 	    !ieee80211_rx_our_beacon(bssid, ifmgd->assoc_bss))
4197 		return;
4198 	bssid = ifmgd->bssid;
4199 
4200 	if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
4201 		ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
4202 					    local, rx_status);
4203 
4204 	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
4205 		mlme_dbg_ratelimited(sdata,
4206 				     "cancelling AP probe due to a received beacon\n");
4207 		ieee80211_reset_ap_probe(sdata);
4208 	}
4209 
4210 	/*
4211 	 * Push the beacon loss detection into the future since
4212 	 * we are processing a beacon from the AP just now.
4213 	 */
4214 	ieee80211_sta_reset_beacon_monitor(sdata);
4215 
4216 	/* TODO: CRC urrently not calculated on S1G Beacon Compatibility
4217 	 * element (which carries the beacon interval). Don't forget to add a
4218 	 * bit to care_about_ies[] above if mac80211 is interested in a
4219 	 * changing S1G element.
4220 	 */
4221 	if (!ieee80211_is_s1g_beacon(hdr->frame_control))
4222 		ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
4223 	elems = ieee802_11_parse_elems_crc(variable, len - baselen,
4224 					   false, care_about_ies, ncrc,
4225 					   mgmt->bssid, bssid);
4226 	if (!elems)
4227 		return;
4228 	ncrc = elems->crc;
4229 
4230 	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
4231 	    ieee80211_check_tim(elems->tim, elems->tim_len, bss_conf->aid)) {
4232 		if (local->hw.conf.dynamic_ps_timeout > 0) {
4233 			if (local->hw.conf.flags & IEEE80211_CONF_PS) {
4234 				local->hw.conf.flags &= ~IEEE80211_CONF_PS;
4235 				ieee80211_hw_config(local,
4236 						    IEEE80211_CONF_CHANGE_PS);
4237 			}
4238 			ieee80211_send_nullfunc(local, sdata, false);
4239 		} else if (!local->pspolling && sdata->u.mgd.powersave) {
4240 			local->pspolling = true;
4241 
4242 			/*
4243 			 * Here is assumed that the driver will be
4244 			 * able to send ps-poll frame and receive a
4245 			 * response even though power save mode is
4246 			 * enabled, but some drivers might require
4247 			 * to disable power save here. This needs
4248 			 * to be investigated.
4249 			 */
4250 			ieee80211_send_pspoll(local, sdata);
4251 		}
4252 	}
4253 
4254 	if (sdata->vif.p2p ||
4255 	    sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
4256 		struct ieee80211_p2p_noa_attr noa = {};
4257 		int ret;
4258 
4259 		ret = cfg80211_get_p2p_attr(variable,
4260 					    len - baselen,
4261 					    IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
4262 					    (u8 *) &noa, sizeof(noa));
4263 		if (ret >= 2) {
4264 			if (sdata->u.mgd.p2p_noa_index != noa.index) {
4265 				/* valid noa_attr and index changed */
4266 				sdata->u.mgd.p2p_noa_index = noa.index;
4267 				memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
4268 				changed |= BSS_CHANGED_P2P_PS;
4269 				/*
4270 				 * make sure we update all information, the CRC
4271 				 * mechanism doesn't look at P2P attributes.
4272 				 */
4273 				ifmgd->beacon_crc_valid = false;
4274 			}
4275 		} else if (sdata->u.mgd.p2p_noa_index != -1) {
4276 			/* noa_attr not found and we had valid noa_attr before */
4277 			sdata->u.mgd.p2p_noa_index = -1;
4278 			memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
4279 			changed |= BSS_CHANGED_P2P_PS;
4280 			ifmgd->beacon_crc_valid = false;
4281 		}
4282 	}
4283 
4284 	if (ifmgd->csa_waiting_bcn)
4285 		ieee80211_chswitch_post_beacon(sdata);
4286 
4287 	/*
4288 	 * Update beacon timing and dtim count on every beacon appearance. This
4289 	 * will allow the driver to use the most updated values. Do it before
4290 	 * comparing this one with last received beacon.
4291 	 * IMPORTANT: These parameters would possibly be out of sync by the time
4292 	 * the driver will use them. The synchronized view is currently
4293 	 * guaranteed only in certain callbacks.
4294 	 */
4295 	if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
4296 	    !ieee80211_is_s1g_beacon(hdr->frame_control)) {
4297 		sdata->vif.bss_conf.sync_tsf =
4298 			le64_to_cpu(mgmt->u.beacon.timestamp);
4299 		sdata->vif.bss_conf.sync_device_ts =
4300 			rx_status->device_timestamp;
4301 		sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count;
4302 	}
4303 
4304 	if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) ||
4305 	    ieee80211_is_s1g_short_beacon(mgmt->frame_control))
4306 		goto free;
4307 	ifmgd->beacon_crc = ncrc;
4308 	ifmgd->beacon_crc_valid = true;
4309 
4310 	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
4311 
4312 	ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
4313 					 rx_status->device_timestamp,
4314 					 elems, true);
4315 
4316 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
4317 	    ieee80211_sta_wmm_params(local, sdata, elems->wmm_param,
4318 				     elems->wmm_param_len,
4319 				     elems->mu_edca_param_set))
4320 		changed |= BSS_CHANGED_QOS;
4321 
4322 	/*
4323 	 * If we haven't had a beacon before, tell the driver about the
4324 	 * DTIM period (and beacon timing if desired) now.
4325 	 */
4326 	if (!ifmgd->have_beacon) {
4327 		/* a few bogus AP send dtim_period = 0 or no TIM IE */
4328 		bss_conf->dtim_period = elems->dtim_period ?: 1;
4329 
4330 		changed |= BSS_CHANGED_BEACON_INFO;
4331 		ifmgd->have_beacon = true;
4332 
4333 		mutex_lock(&local->iflist_mtx);
4334 		ieee80211_recalc_ps(local);
4335 		mutex_unlock(&local->iflist_mtx);
4336 
4337 		ieee80211_recalc_ps_vif(sdata);
4338 	}
4339 
4340 	if (elems->erp_info) {
4341 		erp_valid = true;
4342 		erp_value = elems->erp_info[0];
4343 	} else {
4344 		erp_valid = false;
4345 	}
4346 
4347 	if (!ieee80211_is_s1g_beacon(hdr->frame_control))
4348 		changed |= ieee80211_handle_bss_capability(sdata,
4349 				le16_to_cpu(mgmt->u.beacon.capab_info),
4350 				erp_valid, erp_value);
4351 
4352 	mutex_lock(&local->sta_mtx);
4353 	sta = sta_info_get(sdata, bssid);
4354 
4355 	changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
4356 
4357 	if (ieee80211_config_bw(sdata, sta, elems->ht_cap_elem,
4358 				elems->vht_cap_elem, elems->ht_operation,
4359 				elems->vht_operation, elems->he_operation,
4360 				elems->eht_operation,
4361 				elems->s1g_oper, bssid, &changed)) {
4362 		mutex_unlock(&local->sta_mtx);
4363 		sdata_info(sdata,
4364 			   "failed to follow AP %pM bandwidth change, disconnect\n",
4365 			   bssid);
4366 		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4367 				       WLAN_REASON_DEAUTH_LEAVING,
4368 				       true, deauth_buf);
4369 		ieee80211_report_disconnect(sdata, deauth_buf,
4370 					    sizeof(deauth_buf), true,
4371 					    WLAN_REASON_DEAUTH_LEAVING,
4372 					    false);
4373 		goto free;
4374 	}
4375 
4376 	if (sta && elems->opmode_notif)
4377 		ieee80211_vht_handle_opmode(sdata, sta, *elems->opmode_notif,
4378 					    rx_status->band);
4379 	mutex_unlock(&local->sta_mtx);
4380 
4381 	changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4382 					       elems->country_elem,
4383 					       elems->country_elem_len,
4384 					       elems->pwr_constr_elem,
4385 					       elems->cisco_dtpc_elem);
4386 
4387 	ieee80211_bss_info_change_notify(sdata, changed);
4388 free:
4389 	kfree(elems);
4390 }
4391 
ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)4392 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
4393 				 struct sk_buff *skb)
4394 {
4395 	struct ieee80211_rx_status *rx_status;
4396 	struct ieee80211_hdr *hdr;
4397 	u16 fc;
4398 
4399 	rx_status = (struct ieee80211_rx_status *) skb->cb;
4400 	hdr = (struct ieee80211_hdr *) skb->data;
4401 	fc = le16_to_cpu(hdr->frame_control);
4402 
4403 	sdata_lock(sdata);
4404 	switch (fc & IEEE80211_FCTL_STYPE) {
4405 	case IEEE80211_STYPE_S1G_BEACON:
4406 		ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status);
4407 		break;
4408 	}
4409 	sdata_unlock(sdata);
4410 }
4411 
ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)4412 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4413 				  struct sk_buff *skb)
4414 {
4415 	struct ieee80211_rx_status *rx_status;
4416 	struct ieee80211_mgmt *mgmt;
4417 	u16 fc;
4418 	int ies_len;
4419 
4420 	rx_status = (struct ieee80211_rx_status *) skb->cb;
4421 	mgmt = (struct ieee80211_mgmt *) skb->data;
4422 	fc = le16_to_cpu(mgmt->frame_control);
4423 
4424 	sdata_lock(sdata);
4425 
4426 	switch (fc & IEEE80211_FCTL_STYPE) {
4427 	case IEEE80211_STYPE_BEACON:
4428 		ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt,
4429 					 skb->len, rx_status);
4430 		break;
4431 	case IEEE80211_STYPE_PROBE_RESP:
4432 		ieee80211_rx_mgmt_probe_resp(sdata, skb);
4433 		break;
4434 	case IEEE80211_STYPE_AUTH:
4435 		ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4436 		break;
4437 	case IEEE80211_STYPE_DEAUTH:
4438 		ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4439 		break;
4440 	case IEEE80211_STYPE_DISASSOC:
4441 		ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4442 		break;
4443 	case IEEE80211_STYPE_ASSOC_RESP:
4444 	case IEEE80211_STYPE_REASSOC_RESP:
4445 		ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4446 		break;
4447 	case IEEE80211_STYPE_ACTION:
4448 		if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4449 			struct ieee802_11_elems *elems;
4450 
4451 			ies_len = skb->len -
4452 				  offsetof(struct ieee80211_mgmt,
4453 					   u.action.u.chan_switch.variable);
4454 
4455 			if (ies_len < 0)
4456 				break;
4457 
4458 			/* CSA IE cannot be overridden, no need for BSSID */
4459 			elems = ieee802_11_parse_elems(
4460 					mgmt->u.action.u.chan_switch.variable,
4461 					ies_len, true, mgmt->bssid, NULL);
4462 
4463 			if (elems && !elems->parse_error)
4464 				ieee80211_sta_process_chanswitch(sdata,
4465 								 rx_status->mactime,
4466 								 rx_status->device_timestamp,
4467 								 elems, false);
4468 			kfree(elems);
4469 		} else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4470 			struct ieee802_11_elems *elems;
4471 
4472 			ies_len = skb->len -
4473 				  offsetof(struct ieee80211_mgmt,
4474 					   u.action.u.ext_chan_switch.variable);
4475 
4476 			if (ies_len < 0)
4477 				break;
4478 
4479 			/*
4480 			 * extended CSA IE can't be overridden, no need for
4481 			 * BSSID
4482 			 */
4483 			elems = ieee802_11_parse_elems(
4484 					mgmt->u.action.u.ext_chan_switch.variable,
4485 					ies_len, true, mgmt->bssid, NULL);
4486 
4487 			if (elems && !elems->parse_error) {
4488 				/* for the handling code pretend it was an IE */
4489 				elems->ext_chansw_ie =
4490 					&mgmt->u.action.u.ext_chan_switch.data;
4491 
4492 				ieee80211_sta_process_chanswitch(sdata,
4493 								 rx_status->mactime,
4494 								 rx_status->device_timestamp,
4495 								 elems, false);
4496 			}
4497 
4498 			kfree(elems);
4499 		}
4500 		break;
4501 	}
4502 	sdata_unlock(sdata);
4503 }
4504 
ieee80211_sta_timer(struct timer_list * t)4505 static void ieee80211_sta_timer(struct timer_list *t)
4506 {
4507 	struct ieee80211_sub_if_data *sdata =
4508 		from_timer(sdata, t, u.mgd.timer);
4509 
4510 	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4511 }
4512 
ieee80211_sta_connection_lost(struct ieee80211_sub_if_data * sdata,u8 reason,bool tx)4513 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4514 				   u8 reason, bool tx)
4515 {
4516 	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4517 
4518 	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4519 			       tx, frame_buf);
4520 
4521 	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4522 				    reason, false);
4523 }
4524 
ieee80211_auth(struct ieee80211_sub_if_data * sdata)4525 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4526 {
4527 	struct ieee80211_local *local = sdata->local;
4528 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4529 	struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4530 	u32 tx_flags = 0;
4531 	u16 trans = 1;
4532 	u16 status = 0;
4533 	struct ieee80211_prep_tx_info info = {
4534 		.subtype = IEEE80211_STYPE_AUTH,
4535 	};
4536 
4537 	sdata_assert_lock(sdata);
4538 
4539 	if (WARN_ON_ONCE(!auth_data))
4540 		return -EINVAL;
4541 
4542 	auth_data->tries++;
4543 
4544 	if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4545 		sdata_info(sdata, "authentication with %pM timed out\n",
4546 			   auth_data->bss->bssid);
4547 
4548 		/*
4549 		 * Most likely AP is not in the range so remove the
4550 		 * bss struct for that AP.
4551 		 */
4552 		cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4553 
4554 		return -ETIMEDOUT;
4555 	}
4556 
4557 	if (auth_data->algorithm == WLAN_AUTH_SAE)
4558 		info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4559 
4560 	drv_mgd_prepare_tx(local, sdata, &info);
4561 
4562 	sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4563 		   auth_data->bss->bssid, auth_data->tries,
4564 		   IEEE80211_AUTH_MAX_TRIES);
4565 
4566 	auth_data->expected_transaction = 2;
4567 
4568 	if (auth_data->algorithm == WLAN_AUTH_SAE) {
4569 		trans = auth_data->sae_trans;
4570 		status = auth_data->sae_status;
4571 		auth_data->expected_transaction = trans;
4572 	}
4573 
4574 	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4575 		tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4576 			   IEEE80211_TX_INTFL_MLME_CONN_TX;
4577 
4578 	ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4579 			    auth_data->data, auth_data->data_len,
4580 			    auth_data->bss->bssid,
4581 			    auth_data->bss->bssid, NULL, 0, 0,
4582 			    tx_flags);
4583 
4584 	if (tx_flags == 0) {
4585 		if (auth_data->algorithm == WLAN_AUTH_SAE)
4586 			auth_data->timeout = jiffies +
4587 				IEEE80211_AUTH_TIMEOUT_SAE;
4588 		else
4589 			auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4590 	} else {
4591 		auth_data->timeout =
4592 			round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4593 	}
4594 
4595 	auth_data->timeout_started = true;
4596 	run_again(sdata, auth_data->timeout);
4597 
4598 	return 0;
4599 }
4600 
ieee80211_do_assoc(struct ieee80211_sub_if_data * sdata)4601 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4602 {
4603 	struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4604 	struct ieee80211_local *local = sdata->local;
4605 	int ret;
4606 
4607 	sdata_assert_lock(sdata);
4608 
4609 	assoc_data->tries++;
4610 	if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4611 		sdata_info(sdata, "association with %pM timed out\n",
4612 			   assoc_data->bss->bssid);
4613 
4614 		/*
4615 		 * Most likely AP is not in the range so remove the
4616 		 * bss struct for that AP.
4617 		 */
4618 		cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4619 
4620 		return -ETIMEDOUT;
4621 	}
4622 
4623 	sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4624 		   assoc_data->bss->bssid, assoc_data->tries,
4625 		   IEEE80211_ASSOC_MAX_TRIES);
4626 	ret = ieee80211_send_assoc(sdata);
4627 	if (ret)
4628 		return ret;
4629 
4630 	if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4631 		assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4632 		assoc_data->timeout_started = true;
4633 		run_again(sdata, assoc_data->timeout);
4634 	} else {
4635 		assoc_data->timeout =
4636 			round_jiffies_up(jiffies +
4637 					 IEEE80211_ASSOC_TIMEOUT_LONG);
4638 		assoc_data->timeout_started = true;
4639 		run_again(sdata, assoc_data->timeout);
4640 	}
4641 
4642 	return 0;
4643 }
4644 
ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data * sdata,__le16 fc,bool acked)4645 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4646 				  __le16 fc, bool acked)
4647 {
4648 	struct ieee80211_local *local = sdata->local;
4649 
4650 	sdata->u.mgd.status_fc = fc;
4651 	sdata->u.mgd.status_acked = acked;
4652 	sdata->u.mgd.status_received = true;
4653 
4654 	ieee80211_queue_work(&local->hw, &sdata->work);
4655 }
4656 
ieee80211_sta_work(struct ieee80211_sub_if_data * sdata)4657 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4658 {
4659 	struct ieee80211_local *local = sdata->local;
4660 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4661 
4662 	sdata_lock(sdata);
4663 
4664 	if (ifmgd->status_received) {
4665 		__le16 fc = ifmgd->status_fc;
4666 		bool status_acked = ifmgd->status_acked;
4667 
4668 		ifmgd->status_received = false;
4669 		if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4670 			if (status_acked) {
4671 				if (ifmgd->auth_data->algorithm ==
4672 				    WLAN_AUTH_SAE)
4673 					ifmgd->auth_data->timeout =
4674 						jiffies +
4675 						IEEE80211_AUTH_TIMEOUT_SAE;
4676 				else
4677 					ifmgd->auth_data->timeout =
4678 						jiffies +
4679 						IEEE80211_AUTH_TIMEOUT_SHORT;
4680 				run_again(sdata, ifmgd->auth_data->timeout);
4681 			} else {
4682 				ifmgd->auth_data->timeout = jiffies - 1;
4683 			}
4684 			ifmgd->auth_data->timeout_started = true;
4685 		} else if (ifmgd->assoc_data &&
4686 			   (ieee80211_is_assoc_req(fc) ||
4687 			    ieee80211_is_reassoc_req(fc))) {
4688 			if (status_acked) {
4689 				ifmgd->assoc_data->timeout =
4690 					jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4691 				run_again(sdata, ifmgd->assoc_data->timeout);
4692 			} else {
4693 				ifmgd->assoc_data->timeout = jiffies - 1;
4694 			}
4695 			ifmgd->assoc_data->timeout_started = true;
4696 		}
4697 	}
4698 
4699 	if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4700 	    time_after(jiffies, ifmgd->auth_data->timeout)) {
4701 		if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) {
4702 			/*
4703 			 * ok ... we waited for assoc or continuation but
4704 			 * userspace didn't do it, so kill the auth data
4705 			 */
4706 			ieee80211_destroy_auth_data(sdata, false);
4707 		} else if (ieee80211_auth(sdata)) {
4708 			u8 bssid[ETH_ALEN];
4709 			struct ieee80211_event event = {
4710 				.type = MLME_EVENT,
4711 				.u.mlme.data = AUTH_EVENT,
4712 				.u.mlme.status = MLME_TIMEOUT,
4713 			};
4714 
4715 			memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4716 
4717 			ieee80211_destroy_auth_data(sdata, false);
4718 
4719 			cfg80211_auth_timeout(sdata->dev, bssid);
4720 			drv_event_callback(sdata->local, sdata, &event);
4721 		}
4722 	} else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4723 		run_again(sdata, ifmgd->auth_data->timeout);
4724 
4725 	if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4726 	    time_after(jiffies, ifmgd->assoc_data->timeout)) {
4727 		if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4728 		    ieee80211_do_assoc(sdata)) {
4729 			struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4730 			struct ieee80211_event event = {
4731 				.type = MLME_EVENT,
4732 				.u.mlme.data = ASSOC_EVENT,
4733 				.u.mlme.status = MLME_TIMEOUT,
4734 			};
4735 
4736 			ieee80211_destroy_assoc_data(sdata, false, false);
4737 			cfg80211_assoc_timeout(sdata->dev, bss);
4738 			drv_event_callback(sdata->local, sdata, &event);
4739 		}
4740 	} else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4741 		run_again(sdata, ifmgd->assoc_data->timeout);
4742 
4743 	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4744 	    ifmgd->associated) {
4745 		u8 *bssid = ifmgd->bssid;
4746 		int max_tries;
4747 
4748 		if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4749 			max_tries = max_nullfunc_tries;
4750 		else
4751 			max_tries = max_probe_tries;
4752 
4753 		/* ACK received for nullfunc probing frame */
4754 		if (!ifmgd->probe_send_count)
4755 			ieee80211_reset_ap_probe(sdata);
4756 		else if (ifmgd->nullfunc_failed) {
4757 			if (ifmgd->probe_send_count < max_tries) {
4758 				mlme_dbg(sdata,
4759 					 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4760 					 bssid, ifmgd->probe_send_count,
4761 					 max_tries);
4762 				ieee80211_mgd_probe_ap_send(sdata);
4763 			} else {
4764 				mlme_dbg(sdata,
4765 					 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4766 					 bssid);
4767 				ieee80211_sta_connection_lost(sdata,
4768 					WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4769 					false);
4770 			}
4771 		} else if (time_is_after_jiffies(ifmgd->probe_timeout))
4772 			run_again(sdata, ifmgd->probe_timeout);
4773 		else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4774 			mlme_dbg(sdata,
4775 				 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4776 				 bssid, probe_wait_ms);
4777 			ieee80211_sta_connection_lost(sdata,
4778 				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4779 		} else if (ifmgd->probe_send_count < max_tries) {
4780 			mlme_dbg(sdata,
4781 				 "No probe response from AP %pM after %dms, try %d/%i\n",
4782 				 bssid, probe_wait_ms,
4783 				 ifmgd->probe_send_count, max_tries);
4784 			ieee80211_mgd_probe_ap_send(sdata);
4785 		} else {
4786 			/*
4787 			 * We actually lost the connection ... or did we?
4788 			 * Let's make sure!
4789 			 */
4790 			mlme_dbg(sdata,
4791 				 "No probe response from AP %pM after %dms, disconnecting.\n",
4792 				 bssid, probe_wait_ms);
4793 
4794 			ieee80211_sta_connection_lost(sdata,
4795 				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4796 		}
4797 	}
4798 
4799 	sdata_unlock(sdata);
4800 }
4801 
ieee80211_sta_bcn_mon_timer(struct timer_list * t)4802 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4803 {
4804 	struct ieee80211_sub_if_data *sdata =
4805 		from_timer(sdata, t, u.mgd.bcn_mon_timer);
4806 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4807 
4808 	if (sdata->vif.bss_conf.csa_active && !ifmgd->csa_waiting_bcn)
4809 		return;
4810 
4811 	if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
4812 		return;
4813 
4814 	sdata->u.mgd.connection_loss = false;
4815 	ieee80211_queue_work(&sdata->local->hw,
4816 			     &sdata->u.mgd.beacon_connection_loss_work);
4817 }
4818 
ieee80211_sta_conn_mon_timer(struct timer_list * t)4819 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4820 {
4821 	struct ieee80211_sub_if_data *sdata =
4822 		from_timer(sdata, t, u.mgd.conn_mon_timer);
4823 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4824 	struct ieee80211_local *local = sdata->local;
4825 	struct sta_info *sta;
4826 	unsigned long timeout;
4827 
4828 	if (sdata->vif.bss_conf.csa_active && !ifmgd->csa_waiting_bcn)
4829 		return;
4830 
4831 	sta = sta_info_get(sdata, ifmgd->bssid);
4832 	if (!sta)
4833 		return;
4834 
4835 	timeout = sta->deflink.status_stats.last_ack;
4836 	if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx))
4837 		timeout = sta->deflink.rx_stats.last_rx;
4838 	timeout += IEEE80211_CONNECTION_IDLE_TIME;
4839 
4840 	/* If timeout is after now, then update timer to fire at
4841 	 * the later date, but do not actually probe at this time.
4842 	 */
4843 	if (time_is_after_jiffies(timeout)) {
4844 		mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout));
4845 		return;
4846 	}
4847 
4848 	ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4849 }
4850 
ieee80211_sta_monitor_work(struct work_struct * work)4851 static void ieee80211_sta_monitor_work(struct work_struct *work)
4852 {
4853 	struct ieee80211_sub_if_data *sdata =
4854 		container_of(work, struct ieee80211_sub_if_data,
4855 			     u.mgd.monitor_work);
4856 
4857 	ieee80211_mgd_probe_ap(sdata, false);
4858 }
4859 
ieee80211_restart_sta_timer(struct ieee80211_sub_if_data * sdata)4860 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4861 {
4862 	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4863 		__ieee80211_stop_poll(sdata);
4864 
4865 		/* let's probe the connection once */
4866 		if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4867 			ieee80211_queue_work(&sdata->local->hw,
4868 					     &sdata->u.mgd.monitor_work);
4869 	}
4870 }
4871 
4872 #ifdef CONFIG_PM
ieee80211_mgd_quiesce(struct ieee80211_sub_if_data * sdata)4873 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4874 {
4875 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4876 	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4877 
4878 	sdata_lock(sdata);
4879 
4880 	if (ifmgd->auth_data || ifmgd->assoc_data) {
4881 		const u8 *bssid = ifmgd->auth_data ?
4882 				ifmgd->auth_data->bss->bssid :
4883 				ifmgd->assoc_data->bss->bssid;
4884 
4885 		/*
4886 		 * If we are trying to authenticate / associate while suspending,
4887 		 * cfg80211 won't know and won't actually abort those attempts,
4888 		 * thus we need to do that ourselves.
4889 		 */
4890 		ieee80211_send_deauth_disassoc(sdata, bssid, bssid,
4891 					       IEEE80211_STYPE_DEAUTH,
4892 					       WLAN_REASON_DEAUTH_LEAVING,
4893 					       false, frame_buf);
4894 		if (ifmgd->assoc_data)
4895 			ieee80211_destroy_assoc_data(sdata, false, true);
4896 		if (ifmgd->auth_data)
4897 			ieee80211_destroy_auth_data(sdata, false);
4898 		cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4899 				      IEEE80211_DEAUTH_FRAME_LEN,
4900 				      false);
4901 	}
4902 
4903 	/* This is a bit of a hack - we should find a better and more generic
4904 	 * solution to this. Normally when suspending, cfg80211 will in fact
4905 	 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4906 	 * auth (not so important) or assoc (this is the problem) process.
4907 	 *
4908 	 * As a consequence, it can happen that we are in the process of both
4909 	 * associating and suspending, and receive an association response
4910 	 * after cfg80211 has checked if it needs to disconnect, but before
4911 	 * we actually set the flag to drop incoming frames. This will then
4912 	 * cause the workqueue flush to process the association response in
4913 	 * the suspend, resulting in a successful association just before it
4914 	 * tries to remove the interface from the driver, which now though
4915 	 * has a channel context assigned ... this results in issues.
4916 	 *
4917 	 * To work around this (for now) simply deauth here again if we're
4918 	 * now connected.
4919 	 */
4920 	if (ifmgd->associated && !sdata->local->wowlan) {
4921 		u8 bssid[ETH_ALEN];
4922 		struct cfg80211_deauth_request req = {
4923 			.reason_code = WLAN_REASON_DEAUTH_LEAVING,
4924 			.bssid = bssid,
4925 		};
4926 
4927 		memcpy(bssid, ifmgd->bssid, ETH_ALEN);
4928 		ieee80211_mgd_deauth(sdata, &req);
4929 	}
4930 
4931 	sdata_unlock(sdata);
4932 }
4933 #endif
4934 
ieee80211_sta_restart(struct ieee80211_sub_if_data * sdata)4935 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4936 {
4937 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4938 
4939 	sdata_lock(sdata);
4940 	if (!ifmgd->associated) {
4941 		sdata_unlock(sdata);
4942 		return;
4943 	}
4944 
4945 	if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4946 		sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4947 		mlme_dbg(sdata, "driver requested disconnect after resume\n");
4948 		ieee80211_sta_connection_lost(sdata,
4949 					      WLAN_REASON_UNSPECIFIED,
4950 					      true);
4951 		sdata_unlock(sdata);
4952 		return;
4953 	}
4954 
4955 	if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) {
4956 		sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART;
4957 		mlme_dbg(sdata, "driver requested disconnect after hardware restart\n");
4958 		ieee80211_sta_connection_lost(sdata,
4959 					      WLAN_REASON_UNSPECIFIED,
4960 					      true);
4961 		sdata_unlock(sdata);
4962 		return;
4963 	}
4964 
4965 	sdata_unlock(sdata);
4966 }
4967 
4968 /* interface setup */
ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data * sdata)4969 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4970 {
4971 	struct ieee80211_if_managed *ifmgd;
4972 
4973 	ifmgd = &sdata->u.mgd;
4974 	INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4975 	INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4976 	INIT_WORK(&ifmgd->beacon_connection_loss_work,
4977 		  ieee80211_beacon_connection_loss_work);
4978 	INIT_WORK(&ifmgd->csa_connection_drop_work,
4979 		  ieee80211_csa_connection_drop_work);
4980 	INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4981 	INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4982 			  ieee80211_tdls_peer_del_work);
4983 	timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4984 	timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4985 	timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4986 	timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4987 	INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4988 			  ieee80211_sta_handle_tspec_ac_params_wk);
4989 
4990 	ifmgd->flags = 0;
4991 	ifmgd->powersave = sdata->wdev.ps;
4992 	ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4993 	ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4994 	ifmgd->p2p_noa_index = -1;
4995 
4996 	if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4997 		ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4998 	else
4999 		ifmgd->req_smps = IEEE80211_SMPS_OFF;
5000 
5001 	/* Setup TDLS data */
5002 	spin_lock_init(&ifmgd->teardown_lock);
5003 	ifmgd->teardown_skb = NULL;
5004 	ifmgd->orig_teardown_skb = NULL;
5005 }
5006 
5007 /* scan finished notification */
ieee80211_mlme_notify_scan_completed(struct ieee80211_local * local)5008 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
5009 {
5010 	struct ieee80211_sub_if_data *sdata;
5011 
5012 	/* Restart STA timers */
5013 	rcu_read_lock();
5014 	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
5015 		if (ieee80211_sdata_running(sdata))
5016 			ieee80211_restart_sta_timer(sdata);
5017 	}
5018 	rcu_read_unlock();
5019 }
5020 
ieee80211_max_rx_chains(struct ieee80211_sub_if_data * sdata,struct cfg80211_bss * cbss)5021 static u8 ieee80211_max_rx_chains(struct ieee80211_sub_if_data *sdata,
5022 				  struct cfg80211_bss *cbss)
5023 {
5024 	struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
5025 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5026 	const struct element *ht_cap_elem, *vht_cap_elem;
5027 	const struct cfg80211_bss_ies *ies;
5028 	const struct ieee80211_ht_cap *ht_cap;
5029 	const struct ieee80211_vht_cap *vht_cap;
5030 	const struct ieee80211_he_cap_elem *he_cap;
5031 	const struct element *he_cap_elem;
5032 	u16 mcs_80_map, mcs_160_map;
5033 	int i, mcs_nss_size;
5034 	bool support_160;
5035 	u8 chains = 1;
5036 
5037 	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
5038 		return chains;
5039 
5040 	ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY);
5041 	if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) {
5042 		ht_cap = (void *)ht_cap_elem->data;
5043 		chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
5044 		/*
5045 		 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
5046 		 *	 "Tx Unequal Modulation Supported" fields.
5047 		 */
5048 	}
5049 
5050 	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
5051 		return chains;
5052 
5053 	vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
5054 	if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) {
5055 		u8 nss;
5056 		u16 tx_mcs_map;
5057 
5058 		vht_cap = (void *)vht_cap_elem->data;
5059 		tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
5060 		for (nss = 8; nss > 0; nss--) {
5061 			if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
5062 					IEEE80211_VHT_MCS_NOT_SUPPORTED)
5063 				break;
5064 		}
5065 		/* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
5066 		chains = max(chains, nss);
5067 	}
5068 
5069 	if (ifmgd->flags & IEEE80211_STA_DISABLE_HE)
5070 		return chains;
5071 
5072 	ies = rcu_dereference(cbss->ies);
5073 	he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
5074 					     ies->data, ies->len);
5075 
5076 	if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap))
5077 		return chains;
5078 
5079 	/* skip one byte ext_tag_id */
5080 	he_cap = (void *)(he_cap_elem->data + 1);
5081 	mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
5082 
5083 	/* invalid HE IE */
5084 	if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap))
5085 		return chains;
5086 
5087 	/* mcs_nss is right after he_cap info */
5088 	he_mcs_nss_supp = (void *)(he_cap + 1);
5089 
5090 	mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
5091 
5092 	for (i = 7; i >= 0; i--) {
5093 		u8 mcs_80 = mcs_80_map >> (2 * i) & 3;
5094 
5095 		if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
5096 			chains = max_t(u8, chains, i + 1);
5097 			break;
5098 		}
5099 	}
5100 
5101 	support_160 = he_cap->phy_cap_info[0] &
5102 		      IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
5103 
5104 	if (!support_160)
5105 		return chains;
5106 
5107 	mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160);
5108 	for (i = 7; i >= 0; i--) {
5109 		u8 mcs_160 = mcs_160_map >> (2 * i) & 3;
5110 
5111 		if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
5112 			chains = max_t(u8, chains, i + 1);
5113 			break;
5114 		}
5115 	}
5116 
5117 	return chains;
5118 }
5119 
5120 static bool
ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data * sdata,const struct cfg80211_bss_ies * ies,const struct ieee80211_he_operation * he_op)5121 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
5122 				     const struct cfg80211_bss_ies *ies,
5123 				     const struct ieee80211_he_operation *he_op)
5124 {
5125 	const struct element *he_cap_elem;
5126 	const struct ieee80211_he_cap_elem *he_cap;
5127 	struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
5128 	u16 mcs_80_map_tx, mcs_80_map_rx;
5129 	u16 ap_min_req_set;
5130 	int mcs_nss_size;
5131 	int nss;
5132 
5133 	he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
5134 					     ies->data, ies->len);
5135 
5136 	/* invalid HE IE */
5137 	if (!he_cap_elem || he_cap_elem->datalen < 1 + sizeof(*he_cap)) {
5138 		sdata_info(sdata,
5139 			   "Invalid HE elem, Disable HE\n");
5140 		return false;
5141 	}
5142 
5143 	/* skip one byte ext_tag_id */
5144 	he_cap = (void *)(he_cap_elem->data + 1);
5145 	mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
5146 
5147 	/* invalid HE IE */
5148 	if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) {
5149 		sdata_info(sdata,
5150 			   "Invalid HE elem with nss size, Disable HE\n");
5151 		return false;
5152 	}
5153 
5154 	/* mcs_nss is right after he_cap info */
5155 	he_mcs_nss_supp = (void *)(he_cap + 1);
5156 
5157 	mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
5158 	mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80);
5159 
5160 	/* P802.11-REVme/D0.3
5161 	 * 27.1.1 Introduction to the HE PHY
5162 	 * ...
5163 	 * An HE STA shall support the following features:
5164 	 * ...
5165 	 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all
5166 	 * supported channel widths for HE SU PPDUs
5167 	 */
5168 	if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED ||
5169 	    (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) {
5170 		sdata_info(sdata,
5171 			   "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n",
5172 			   mcs_80_map_tx, mcs_80_map_rx);
5173 		return false;
5174 	}
5175 
5176 	if (!he_op)
5177 		return true;
5178 
5179 	ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
5180 
5181 	/* make sure the AP is consistent with itself
5182 	 *
5183 	 * P802.11-REVme/D0.3
5184 	 * 26.17.1 Basic HE BSS operation
5185 	 *
5186 	 * A STA that is operating in an HE BSS shall be able to receive and
5187 	 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the
5188 	 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the
5189 	 * MLME-START.request primitive and shall be able to receive at each of
5190 	 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and
5191 	 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request
5192 	 * primitive
5193 	 */
5194 	for (nss = 8; nss > 0; nss--) {
5195 		u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
5196 		u8 ap_rx_val;
5197 		u8 ap_tx_val;
5198 
5199 		if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
5200 			continue;
5201 
5202 		ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3;
5203 		ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3;
5204 
5205 		if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
5206 		    ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
5207 		    ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) {
5208 			sdata_info(sdata,
5209 				   "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n",
5210 				   nss, ap_rx_val, ap_rx_val, ap_op_val);
5211 			return false;
5212 		}
5213 	}
5214 
5215 	return true;
5216 }
5217 
5218 static bool
ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const struct ieee80211_he_operation * he_op)5219 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
5220 				    struct ieee80211_supported_band *sband,
5221 				    const struct ieee80211_he_operation *he_op)
5222 {
5223 	const struct ieee80211_sta_he_cap *sta_he_cap =
5224 		ieee80211_get_he_iftype_cap(sband,
5225 					    ieee80211_vif_type_p2p(&sdata->vif));
5226 	u16 ap_min_req_set;
5227 	int i;
5228 
5229 	if (!sta_he_cap || !he_op)
5230 		return false;
5231 
5232 	ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
5233 
5234 	/* Need to go over for 80MHz, 160MHz and for 80+80 */
5235 	for (i = 0; i < 3; i++) {
5236 		const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
5237 			&sta_he_cap->he_mcs_nss_supp;
5238 		u16 sta_mcs_map_rx =
5239 			le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
5240 		u16 sta_mcs_map_tx =
5241 			le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
5242 		u8 nss;
5243 		bool verified = true;
5244 
5245 		/*
5246 		 * For each band there is a maximum of 8 spatial streams
5247 		 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
5248 		 * of 2 bits per NSS (1-8), with the values defined in enum
5249 		 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
5250 		 * capabilities aren't less than the AP's minimum requirements
5251 		 * for this HE BSS per SS.
5252 		 * It is enough to find one such band that meets the reqs.
5253 		 */
5254 		for (nss = 8; nss > 0; nss--) {
5255 			u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
5256 			u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
5257 			u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
5258 
5259 			if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
5260 				continue;
5261 
5262 			/*
5263 			 * Make sure the HE AP doesn't require MCSs that aren't
5264 			 * supported by the client as required by spec
5265 			 *
5266 			 * P802.11-REVme/D0.3
5267 			 * 26.17.1 Basic HE BSS operation
5268 			 *
5269 			 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive)
5270 			 * a BSS, unless it supports (i.e., is able to both transmit and
5271 			 * receive using) all of the <HE-MCS, NSS> tuples in the basic
5272 			 * HE-MCS and NSS set.
5273 			 */
5274 			if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
5275 			    sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
5276 			    (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
5277 				verified = false;
5278 				break;
5279 			}
5280 		}
5281 
5282 		if (verified)
5283 			return true;
5284 	}
5285 
5286 	/* If here, STA doesn't meet AP's HE min requirements */
5287 	return false;
5288 }
5289 
ieee80211_prep_channel(struct ieee80211_sub_if_data * sdata,struct cfg80211_bss * cbss)5290 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
5291 				  struct cfg80211_bss *cbss)
5292 {
5293 	struct ieee80211_local *local = sdata->local;
5294 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5295 	const struct ieee80211_ht_cap *ht_cap = NULL;
5296 	const struct ieee80211_ht_operation *ht_oper = NULL;
5297 	const struct ieee80211_vht_operation *vht_oper = NULL;
5298 	const struct ieee80211_he_operation *he_oper = NULL;
5299 	const struct ieee80211_eht_operation *eht_oper = NULL;
5300 	const struct ieee80211_s1g_oper_ie *s1g_oper = NULL;
5301 	struct ieee80211_supported_band *sband;
5302 	struct cfg80211_chan_def chandef;
5303 	bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
5304 	bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
5305 	struct ieee80211_bss *bss = (void *)cbss->priv;
5306 	struct ieee802_11_elems *elems;
5307 	const struct cfg80211_bss_ies *ies;
5308 	int ret;
5309 	u32 i;
5310 	bool have_80mhz;
5311 
5312 	rcu_read_lock();
5313 
5314 	ies = rcu_dereference(cbss->ies);
5315 	elems = ieee802_11_parse_elems(ies->data, ies->len, false,
5316 				       NULL, NULL);
5317 	if (!elems) {
5318 		rcu_read_unlock();
5319 		return -ENOMEM;
5320 	}
5321 
5322 	sband = local->hw.wiphy->bands[cbss->channel->band];
5323 
5324 	ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
5325 			  IEEE80211_STA_DISABLE_80P80MHZ |
5326 			  IEEE80211_STA_DISABLE_160MHZ);
5327 
5328 	/* disable HT/VHT/HE if we don't support them */
5329 	if (!sband->ht_cap.ht_supported && !is_6ghz) {
5330 		mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n");
5331 		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5332 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5333 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5334 		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5335 	}
5336 
5337 	if (!sband->vht_cap.vht_supported && is_5ghz) {
5338 		mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n");
5339 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5340 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5341 		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5342 	}
5343 
5344 	if (!ieee80211_get_he_iftype_cap(sband,
5345 					 ieee80211_vif_type_p2p(&sdata->vif))) {
5346 		mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n");
5347 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5348 		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5349 	}
5350 
5351 	if (!ieee80211_get_eht_iftype_cap(sband,
5352 					  ieee80211_vif_type_p2p(&sdata->vif))) {
5353 		mlme_dbg(sdata, "EHT not supported, disabling EHT\n");
5354 		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5355 	}
5356 
5357 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
5358 		ht_oper = elems->ht_operation;
5359 		ht_cap = elems->ht_cap_elem;
5360 
5361 		if (!ht_cap) {
5362 			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5363 			ht_oper = NULL;
5364 		}
5365 	}
5366 
5367 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) {
5368 		vht_oper = elems->vht_operation;
5369 		if (vht_oper && !ht_oper) {
5370 			vht_oper = NULL;
5371 			sdata_info(sdata,
5372 				   "AP advertised VHT without HT, disabling HT/VHT/HE\n");
5373 			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5374 			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5375 			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5376 			ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5377 		}
5378 
5379 		if (!elems->vht_cap_elem) {
5380 			sdata_info(sdata,
5381 				   "bad VHT capabilities, disabling VHT\n");
5382 			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5383 			vht_oper = NULL;
5384 		}
5385 	}
5386 
5387 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
5388 		he_oper = elems->he_operation;
5389 
5390 		if (is_6ghz) {
5391 			struct ieee80211_bss_conf *bss_conf;
5392 			u8 i, j = 0;
5393 
5394 			bss_conf = &sdata->vif.bss_conf;
5395 
5396 			if (elems->pwr_constr_elem)
5397 				bss_conf->pwr_reduction = *elems->pwr_constr_elem;
5398 
5399 			BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) !=
5400 				     ARRAY_SIZE(elems->tx_pwr_env));
5401 
5402 			for (i = 0; i < elems->tx_pwr_env_num; i++) {
5403 				if (elems->tx_pwr_env_len[i] >
5404 				    sizeof(bss_conf->tx_pwr_env[j]))
5405 					continue;
5406 
5407 				bss_conf->tx_pwr_env_num++;
5408 				memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i],
5409 				       elems->tx_pwr_env_len[i]);
5410 				j++;
5411 			}
5412 		}
5413 
5414 		if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) ||
5415 		    !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
5416 			ifmgd->flags |= IEEE80211_STA_DISABLE_HE |
5417 				        IEEE80211_STA_DISABLE_EHT;
5418 	}
5419 
5420 	/*
5421 	 * EHT requires HE to be supported as well. Specifically for 6 GHz
5422 	 * channels, the operation channel information can only be deduced from
5423 	 * both the 6 GHz operation information (from the HE operation IE) and
5424 	 * EHT operation.
5425 	 */
5426 	if (!(ifmgd->flags & (IEEE80211_STA_DISABLE_HE |
5427 			      IEEE80211_STA_DISABLE_EHT)) && he_oper) {
5428 		const struct cfg80211_bss_ies *ies;
5429 		const u8 *eht_oper_ie;
5430 
5431 		ies = rcu_dereference(cbss->ies);
5432 		eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION,
5433 						   ies->data, ies->len);
5434 		if (eht_oper_ie && eht_oper_ie[1] >=
5435 		    1 + sizeof(struct ieee80211_eht_operation))
5436 			eht_oper = (void *)(eht_oper_ie + 3);
5437 		else
5438 			eht_oper = NULL;
5439 	}
5440 
5441 	/* Allow VHT if at least one channel on the sband supports 80 MHz */
5442 	have_80mhz = false;
5443 	for (i = 0; i < sband->n_channels; i++) {
5444 		if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
5445 						IEEE80211_CHAN_NO_80MHZ))
5446 			continue;
5447 
5448 		have_80mhz = true;
5449 		break;
5450 	}
5451 
5452 	if (!have_80mhz) {
5453 		sdata_info(sdata, "80 MHz not supported, disabling VHT\n");
5454 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5455 	}
5456 
5457 	if (sband->band == NL80211_BAND_S1GHZ) {
5458 		s1g_oper = elems->s1g_oper;
5459 		if (!s1g_oper)
5460 			sdata_info(sdata,
5461 				   "AP missing S1G operation element?\n");
5462 	}
5463 
5464 	ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
5465 						     cbss->channel,
5466 						     bss->vht_cap_info,
5467 						     ht_oper, vht_oper,
5468 						     he_oper, eht_oper,
5469 						     s1g_oper,
5470 						     &chandef, false);
5471 
5472 	sdata->needed_rx_chains = min(ieee80211_max_rx_chains(sdata, cbss),
5473 				      local->rx_chains);
5474 
5475 	rcu_read_unlock();
5476 	/* the element data was RCU protected so no longer valid anyway */
5477 	kfree(elems);
5478 	elems = NULL;
5479 
5480 	if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) {
5481 		sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
5482 		return -EINVAL;
5483 	}
5484 
5485 	/* will change later if needed */
5486 	sdata->smps_mode = IEEE80211_SMPS_OFF;
5487 
5488 	mutex_lock(&local->mtx);
5489 	/*
5490 	 * If this fails (possibly due to channel context sharing
5491 	 * on incompatible channels, e.g. 80+80 and 160 sharing the
5492 	 * same control channel) try to use a smaller bandwidth.
5493 	 */
5494 	ret = ieee80211_vif_use_channel(sdata, &chandef,
5495 					IEEE80211_CHANCTX_SHARED);
5496 
5497 	/* don't downgrade for 5 and 10 MHz channels, though. */
5498 	if (chandef.width == NL80211_CHAN_WIDTH_5 ||
5499 	    chandef.width == NL80211_CHAN_WIDTH_10)
5500 		goto out;
5501 
5502 	while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
5503 		ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
5504 		ret = ieee80211_vif_use_channel(sdata, &chandef,
5505 						IEEE80211_CHANCTX_SHARED);
5506 	}
5507  out:
5508 	mutex_unlock(&local->mtx);
5509 	return ret;
5510 }
5511 
ieee80211_get_dtim(const struct cfg80211_bss_ies * ies,u8 * dtim_count,u8 * dtim_period)5512 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
5513 			       u8 *dtim_count, u8 *dtim_period)
5514 {
5515 	const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
5516 	const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
5517 					 ies->len);
5518 	const struct ieee80211_tim_ie *tim = NULL;
5519 	const struct ieee80211_bssid_index *idx;
5520 	bool valid = tim_ie && tim_ie[1] >= 2;
5521 
5522 	if (valid)
5523 		tim = (void *)(tim_ie + 2);
5524 
5525 	if (dtim_count)
5526 		*dtim_count = valid ? tim->dtim_count : 0;
5527 
5528 	if (dtim_period)
5529 		*dtim_period = valid ? tim->dtim_period : 0;
5530 
5531 	/* Check if value is overridden by non-transmitted profile */
5532 	if (!idx_ie || idx_ie[1] < 3)
5533 		return valid;
5534 
5535 	idx = (void *)(idx_ie + 2);
5536 
5537 	if (dtim_count)
5538 		*dtim_count = idx->dtim_count;
5539 
5540 	if (dtim_period)
5541 		*dtim_period = idx->dtim_period;
5542 
5543 	return true;
5544 }
5545 
ieee80211_prep_connection(struct ieee80211_sub_if_data * sdata,struct cfg80211_bss * cbss,bool assoc,bool override)5546 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5547 				     struct cfg80211_bss *cbss, bool assoc,
5548 				     bool override)
5549 {
5550 	struct ieee80211_local *local = sdata->local;
5551 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5552 	struct ieee80211_bss *bss = (void *)cbss->priv;
5553 	struct sta_info *new_sta = NULL;
5554 	struct ieee80211_supported_band *sband;
5555 	bool have_sta = false;
5556 	int err;
5557 
5558 	sband = local->hw.wiphy->bands[cbss->channel->band];
5559 
5560 	if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
5561 		return -EINVAL;
5562 
5563 	/* If a reconfig is happening, bail out */
5564 	if (local->in_reconfig)
5565 		return -EBUSY;
5566 
5567 	if (assoc) {
5568 		rcu_read_lock();
5569 		have_sta = sta_info_get(sdata, cbss->bssid);
5570 		rcu_read_unlock();
5571 	}
5572 
5573 	if (!have_sta) {
5574 		new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
5575 		if (!new_sta)
5576 			return -ENOMEM;
5577 	}
5578 
5579 	/*
5580 	 * Set up the information for the new channel before setting the
5581 	 * new channel. We can't - completely race-free - change the basic
5582 	 * rates bitmap and the channel (sband) that it refers to, but if
5583 	 * we set it up before we at least avoid calling into the driver's
5584 	 * bss_info_changed() method with invalid information (since we do
5585 	 * call that from changing the channel - only for IDLE and perhaps
5586 	 * some others, but ...).
5587 	 *
5588 	 * So to avoid that, just set up all the new information before the
5589 	 * channel, but tell the driver to apply it only afterwards, since
5590 	 * it might need the new channel for that.
5591 	 */
5592 	if (new_sta) {
5593 		u32 rates = 0, basic_rates = 0;
5594 		bool have_higher_than_11mbit = false;
5595 		int min_rate = INT_MAX, min_rate_index = -1;
5596 		const struct cfg80211_bss_ies *ies;
5597 		int shift = ieee80211_vif_get_shift(&sdata->vif);
5598 
5599 		/* TODO: S1G Basic Rate Set is expressed elsewhere */
5600 		if (cbss->channel->band == NL80211_BAND_S1GHZ) {
5601 			ieee80211_s1g_sta_rate_init(new_sta);
5602 			goto skip_rates;
5603 		}
5604 
5605 		ieee80211_get_rates(sband, bss->supp_rates,
5606 				    bss->supp_rates_len,
5607 				    &rates, &basic_rates,
5608 				    &have_higher_than_11mbit,
5609 				    &min_rate, &min_rate_index,
5610 				    shift);
5611 
5612 		/*
5613 		 * This used to be a workaround for basic rates missing
5614 		 * in the association response frame. Now that we no
5615 		 * longer use the basic rates from there, it probably
5616 		 * doesn't happen any more, but keep the workaround so
5617 		 * in case some *other* APs are buggy in different ways
5618 		 * we can connect -- with a warning.
5619 		 * Allow this workaround only in case the AP provided at least
5620 		 * one rate.
5621 		 */
5622 		if (min_rate_index < 0) {
5623 			sdata_info(sdata,
5624 				   "No legacy rates in association response\n");
5625 
5626 			sta_info_free(local, new_sta);
5627 			return -EINVAL;
5628 		} else if (!basic_rates) {
5629 			sdata_info(sdata,
5630 				   "No basic rates, using min rate instead\n");
5631 			basic_rates = BIT(min_rate_index);
5632 		}
5633 
5634 		if (rates)
5635 			new_sta->sta.deflink.supp_rates[cbss->channel->band] = rates;
5636 		else
5637 			sdata_info(sdata,
5638 				   "No rates found, keeping mandatory only\n");
5639 
5640 		sdata->vif.bss_conf.basic_rates = basic_rates;
5641 
5642 		/* cf. IEEE 802.11 9.2.12 */
5643 		if (cbss->channel->band == NL80211_BAND_2GHZ &&
5644 		    have_higher_than_11mbit)
5645 			sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
5646 		else
5647 			sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
5648 
5649 skip_rates:
5650 		memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
5651 
5652 		/* set timing information */
5653 		sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
5654 		rcu_read_lock();
5655 		ies = rcu_dereference(cbss->beacon_ies);
5656 		if (ies) {
5657 			sdata->vif.bss_conf.sync_tsf = ies->tsf;
5658 			sdata->vif.bss_conf.sync_device_ts =
5659 				bss->device_ts_beacon;
5660 
5661 			ieee80211_get_dtim(ies,
5662 					   &sdata->vif.bss_conf.sync_dtim_count,
5663 					   NULL);
5664 		} else if (!ieee80211_hw_check(&sdata->local->hw,
5665 					       TIMING_BEACON_ONLY)) {
5666 			ies = rcu_dereference(cbss->proberesp_ies);
5667 			/* must be non-NULL since beacon IEs were NULL */
5668 			sdata->vif.bss_conf.sync_tsf = ies->tsf;
5669 			sdata->vif.bss_conf.sync_device_ts =
5670 				bss->device_ts_presp;
5671 			sdata->vif.bss_conf.sync_dtim_count = 0;
5672 		} else {
5673 			sdata->vif.bss_conf.sync_tsf = 0;
5674 			sdata->vif.bss_conf.sync_device_ts = 0;
5675 			sdata->vif.bss_conf.sync_dtim_count = 0;
5676 		}
5677 		rcu_read_unlock();
5678 	}
5679 
5680 	if (new_sta || override) {
5681 		err = ieee80211_prep_channel(sdata, cbss);
5682 		if (err) {
5683 			if (new_sta)
5684 				sta_info_free(local, new_sta);
5685 			return -EINVAL;
5686 		}
5687 	}
5688 
5689 	if (new_sta) {
5690 		/*
5691 		 * tell driver about BSSID, basic rates and timing
5692 		 * this was set up above, before setting the channel
5693 		 */
5694 		ieee80211_bss_info_change_notify(sdata,
5695 			BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5696 			BSS_CHANGED_BEACON_INT);
5697 
5698 		if (assoc)
5699 			sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5700 
5701 		err = sta_info_insert(new_sta);
5702 		new_sta = NULL;
5703 		if (err) {
5704 			sdata_info(sdata,
5705 				   "failed to insert STA entry for the AP (error %d)\n",
5706 				   err);
5707 			return err;
5708 		}
5709 	} else
5710 		WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5711 
5712 	/* Cancel scan to ensure that nothing interferes with connection */
5713 	if (local->scanning)
5714 		ieee80211_scan_cancel(local);
5715 
5716 	return 0;
5717 }
5718 
5719 /* config hooks */
ieee80211_mgd_auth(struct ieee80211_sub_if_data * sdata,struct cfg80211_auth_request * req)5720 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5721 		       struct cfg80211_auth_request *req)
5722 {
5723 	struct ieee80211_local *local = sdata->local;
5724 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5725 	struct ieee80211_mgd_auth_data *auth_data;
5726 	u16 auth_alg;
5727 	int err;
5728 	bool cont_auth;
5729 
5730 	/* prepare auth data structure */
5731 
5732 	switch (req->auth_type) {
5733 	case NL80211_AUTHTYPE_OPEN_SYSTEM:
5734 		auth_alg = WLAN_AUTH_OPEN;
5735 		break;
5736 	case NL80211_AUTHTYPE_SHARED_KEY:
5737 		if (fips_enabled)
5738 			return -EOPNOTSUPP;
5739 		auth_alg = WLAN_AUTH_SHARED_KEY;
5740 		break;
5741 	case NL80211_AUTHTYPE_FT:
5742 		auth_alg = WLAN_AUTH_FT;
5743 		break;
5744 	case NL80211_AUTHTYPE_NETWORK_EAP:
5745 		auth_alg = WLAN_AUTH_LEAP;
5746 		break;
5747 	case NL80211_AUTHTYPE_SAE:
5748 		auth_alg = WLAN_AUTH_SAE;
5749 		break;
5750 	case NL80211_AUTHTYPE_FILS_SK:
5751 		auth_alg = WLAN_AUTH_FILS_SK;
5752 		break;
5753 	case NL80211_AUTHTYPE_FILS_SK_PFS:
5754 		auth_alg = WLAN_AUTH_FILS_SK_PFS;
5755 		break;
5756 	case NL80211_AUTHTYPE_FILS_PK:
5757 		auth_alg = WLAN_AUTH_FILS_PK;
5758 		break;
5759 	default:
5760 		return -EOPNOTSUPP;
5761 	}
5762 
5763 	if (ifmgd->assoc_data)
5764 		return -EBUSY;
5765 
5766 	auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5767 			    req->ie_len, GFP_KERNEL);
5768 	if (!auth_data)
5769 		return -ENOMEM;
5770 
5771 	auth_data->bss = req->bss;
5772 
5773 	if (req->auth_data_len >= 4) {
5774 		if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5775 			__le16 *pos = (__le16 *) req->auth_data;
5776 
5777 			auth_data->sae_trans = le16_to_cpu(pos[0]);
5778 			auth_data->sae_status = le16_to_cpu(pos[1]);
5779 		}
5780 		memcpy(auth_data->data, req->auth_data + 4,
5781 		       req->auth_data_len - 4);
5782 		auth_data->data_len += req->auth_data_len - 4;
5783 	}
5784 
5785 	/* Check if continuing authentication or trying to authenticate with the
5786 	 * same BSS that we were in the process of authenticating with and avoid
5787 	 * removal and re-addition of the STA entry in
5788 	 * ieee80211_prep_connection().
5789 	 */
5790 	cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5791 
5792 	if (req->ie && req->ie_len) {
5793 		memcpy(&auth_data->data[auth_data->data_len],
5794 		       req->ie, req->ie_len);
5795 		auth_data->data_len += req->ie_len;
5796 	}
5797 
5798 	if (req->key && req->key_len) {
5799 		auth_data->key_len = req->key_len;
5800 		auth_data->key_idx = req->key_idx;
5801 		memcpy(auth_data->key, req->key, req->key_len);
5802 	}
5803 
5804 	auth_data->algorithm = auth_alg;
5805 
5806 	/* try to authenticate/probe */
5807 
5808 	if (ifmgd->auth_data) {
5809 		if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5810 			auth_data->peer_confirmed =
5811 				ifmgd->auth_data->peer_confirmed;
5812 		}
5813 		ieee80211_destroy_auth_data(sdata, cont_auth);
5814 	}
5815 
5816 	/* prep auth_data so we don't go into idle on disassoc */
5817 	ifmgd->auth_data = auth_data;
5818 
5819 	/* If this is continuation of an ongoing SAE authentication exchange
5820 	 * (i.e., request to send SAE Confirm) and the peer has already
5821 	 * confirmed, mark authentication completed since we are about to send
5822 	 * out SAE Confirm.
5823 	 */
5824 	if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5825 	    auth_data->peer_confirmed && auth_data->sae_trans == 2)
5826 		ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5827 
5828 	if (ifmgd->associated) {
5829 		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5830 
5831 		sdata_info(sdata,
5832 			   "disconnect from AP %pM for new auth to %pM\n",
5833 			   ifmgd->bssid, req->bss->bssid);
5834 		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5835 				       WLAN_REASON_UNSPECIFIED,
5836 				       false, frame_buf);
5837 
5838 		ieee80211_report_disconnect(sdata, frame_buf,
5839 					    sizeof(frame_buf), true,
5840 					    WLAN_REASON_UNSPECIFIED,
5841 					    false);
5842 	}
5843 
5844 	sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5845 
5846 	err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5847 	if (err)
5848 		goto err_clear;
5849 
5850 	err = ieee80211_auth(sdata);
5851 	if (err) {
5852 		sta_info_destroy_addr(sdata, req->bss->bssid);
5853 		goto err_clear;
5854 	}
5855 
5856 	/* hold our own reference */
5857 	cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5858 	return 0;
5859 
5860  err_clear:
5861 	eth_zero_addr(ifmgd->bssid);
5862 	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5863 	ifmgd->auth_data = NULL;
5864 	mutex_lock(&sdata->local->mtx);
5865 	ieee80211_vif_release_channel(sdata);
5866 	mutex_unlock(&sdata->local->mtx);
5867 	kfree(auth_data);
5868 	return err;
5869 }
5870 
ieee80211_mgd_assoc(struct ieee80211_sub_if_data * sdata,struct cfg80211_assoc_request * req)5871 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5872 			struct cfg80211_assoc_request *req)
5873 {
5874 	bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ;
5875 	bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ;
5876 	struct ieee80211_local *local = sdata->local;
5877 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5878 	struct ieee80211_bss *bss = (void *)req->bss->priv;
5879 	struct ieee80211_mgd_assoc_data *assoc_data;
5880 	const struct cfg80211_bss_ies *beacon_ies;
5881 	struct ieee80211_supported_band *sband;
5882 	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
5883 	const struct element *ssid_elem, *ht_elem, *vht_elem;
5884 	int i, err;
5885 	bool override = false;
5886 
5887 	assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5888 	if (!assoc_data)
5889 		return -ENOMEM;
5890 
5891 	rcu_read_lock();
5892 	ssid_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_SSID);
5893 	if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) {
5894 		rcu_read_unlock();
5895 		kfree(assoc_data);
5896 		return -EINVAL;
5897 	}
5898 	memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen);
5899 	assoc_data->ssid_len = ssid_elem->datalen;
5900 	memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len);
5901 	bss_conf->ssid_len = assoc_data->ssid_len;
5902 	rcu_read_unlock();
5903 
5904 	if (ifmgd->associated) {
5905 		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5906 
5907 		sdata_info(sdata,
5908 			   "disconnect from AP %pM for new assoc to %pM\n",
5909 			   ifmgd->bssid, req->bss->bssid);
5910 		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5911 				       WLAN_REASON_UNSPECIFIED,
5912 				       false, frame_buf);
5913 
5914 		ieee80211_report_disconnect(sdata, frame_buf,
5915 					    sizeof(frame_buf), true,
5916 					    WLAN_REASON_UNSPECIFIED,
5917 					    false);
5918 	}
5919 
5920 	if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5921 		err = -EBUSY;
5922 		goto err_free;
5923 	}
5924 
5925 	if (ifmgd->assoc_data) {
5926 		err = -EBUSY;
5927 		goto err_free;
5928 	}
5929 
5930 	if (ifmgd->auth_data) {
5931 		bool match;
5932 
5933 		/* keep sta info, bssid if matching */
5934 		match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5935 		ieee80211_destroy_auth_data(sdata, match);
5936 	}
5937 
5938 	/* prepare assoc data */
5939 
5940 	ifmgd->beacon_crc_valid = false;
5941 
5942 	assoc_data->wmm = bss->wmm_used &&
5943 			  (local->hw.queues >= IEEE80211_NUM_ACS);
5944 
5945 	/*
5946 	 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5947 	 * We still associate in non-HT mode (11a/b/g) if any one of these
5948 	 * ciphers is configured as pairwise.
5949 	 * We can set this to true for non-11n hardware, that'll be checked
5950 	 * separately along with the peer capabilities.
5951 	 */
5952 	for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5953 		if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5954 		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5955 		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5956 			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5957 			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5958 			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5959 			ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5960 			netdev_info(sdata->dev,
5961 				    "disabling HT/VHT/HE due to WEP/TKIP use\n");
5962 		}
5963 	}
5964 
5965 	sband = local->hw.wiphy->bands[req->bss->channel->band];
5966 
5967 	/* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */
5968 	if (!bss->wmm_used) {
5969 		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5970 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5971 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5972 		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5973 		netdev_info(sdata->dev,
5974 			    "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
5975 	}
5976 
5977 	memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5978 	memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5979 	       sizeof(ifmgd->ht_capa_mask));
5980 
5981 	memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5982 	memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5983 	       sizeof(ifmgd->vht_capa_mask));
5984 
5985 	memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa));
5986 	memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask,
5987 	       sizeof(ifmgd->s1g_capa_mask));
5988 
5989 	if (req->ie && req->ie_len) {
5990 		memcpy(assoc_data->ie, req->ie, req->ie_len);
5991 		assoc_data->ie_len = req->ie_len;
5992 	}
5993 
5994 	if (req->fils_kek) {
5995 		/* should already be checked in cfg80211 - so warn */
5996 		if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5997 			err = -EINVAL;
5998 			goto err_free;
5999 		}
6000 		memcpy(assoc_data->fils_kek, req->fils_kek,
6001 		       req->fils_kek_len);
6002 		assoc_data->fils_kek_len = req->fils_kek_len;
6003 	}
6004 
6005 	if (req->fils_nonces)
6006 		memcpy(assoc_data->fils_nonces, req->fils_nonces,
6007 		       2 * FILS_NONCE_LEN);
6008 
6009 	assoc_data->bss = req->bss;
6010 	assoc_data->capability = req->bss->capability;
6011 	assoc_data->supp_rates = bss->supp_rates;
6012 	assoc_data->supp_rates_len = bss->supp_rates_len;
6013 
6014 	rcu_read_lock();
6015 	ht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_HT_OPERATION);
6016 	if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation))
6017 		assoc_data->ap_ht_param =
6018 			((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param;
6019 	else if (!is_6ghz)
6020 		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
6021 	vht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_VHT_CAPABILITY);
6022 	if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) {
6023 		memcpy(&assoc_data->ap_vht_cap, vht_elem->data,
6024 		       sizeof(struct ieee80211_vht_cap));
6025 	} else if (is_5ghz) {
6026 		sdata_info(sdata,
6027 			   "VHT capa missing/short, disabling VHT/HE/EHT\n");
6028 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT |
6029 				IEEE80211_STA_DISABLE_HE |
6030 				IEEE80211_STA_DISABLE_EHT;
6031 	}
6032 	rcu_read_unlock();
6033 
6034 	if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
6035 		 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
6036 	     "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
6037 		sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
6038 
6039 	if (bss->wmm_used && bss->uapsd_supported &&
6040 	    (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
6041 		assoc_data->uapsd = true;
6042 		ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
6043 	} else {
6044 		assoc_data->uapsd = false;
6045 		ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
6046 	}
6047 
6048 	if (req->prev_bssid)
6049 		memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
6050 
6051 	if (req->use_mfp) {
6052 		ifmgd->mfp = IEEE80211_MFP_REQUIRED;
6053 		ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
6054 	} else {
6055 		ifmgd->mfp = IEEE80211_MFP_DISABLED;
6056 		ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
6057 	}
6058 
6059 	if (req->flags & ASSOC_REQ_USE_RRM)
6060 		ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
6061 	else
6062 		ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
6063 
6064 	if (req->crypto.control_port)
6065 		ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
6066 	else
6067 		ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
6068 
6069 	sdata->control_port_protocol = req->crypto.control_port_ethertype;
6070 	sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
6071 	sdata->control_port_over_nl80211 =
6072 					req->crypto.control_port_over_nl80211;
6073 	sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
6074 	sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
6075 							sdata->vif.type);
6076 
6077 	/* kick off associate process */
6078 
6079 	ifmgd->assoc_data = assoc_data;
6080 	ifmgd->dtim_period = 0;
6081 	ifmgd->have_beacon = false;
6082 
6083 	/* override HT/VHT configuration only if the AP and we support it */
6084 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
6085 		struct ieee80211_sta_ht_cap sta_ht_cap;
6086 
6087 		if (req->flags & ASSOC_REQ_DISABLE_HT)
6088 			override = true;
6089 
6090 		memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
6091 		ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
6092 
6093 		/* check for 40 MHz disable override */
6094 		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
6095 		    sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
6096 		    !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
6097 			override = true;
6098 
6099 		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
6100 		    req->flags & ASSOC_REQ_DISABLE_VHT)
6101 			override = true;
6102 	}
6103 
6104 	if (req->flags & ASSOC_REQ_DISABLE_HT) {
6105 		mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n");
6106 		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
6107 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
6108 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
6109 		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
6110 	}
6111 
6112 	if (req->flags & ASSOC_REQ_DISABLE_VHT) {
6113 		mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n");
6114 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
6115 	}
6116 
6117 	if (req->flags & ASSOC_REQ_DISABLE_HE) {
6118 		mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n");
6119 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
6120 		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
6121 	}
6122 
6123 	if (req->flags & ASSOC_REQ_DISABLE_EHT)
6124 		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
6125 
6126 	err = ieee80211_prep_connection(sdata, req->bss, true, override);
6127 	if (err)
6128 		goto err_clear;
6129 
6130 	if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
6131 		if (ifmgd->powersave)
6132 			sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
6133 		else
6134 			sdata->smps_mode = IEEE80211_SMPS_OFF;
6135 	} else {
6136 		sdata->smps_mode = ifmgd->req_smps;
6137 	}
6138 
6139 	rcu_read_lock();
6140 	beacon_ies = rcu_dereference(req->bss->beacon_ies);
6141 
6142 	if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
6143 	    !beacon_ies) {
6144 		/*
6145 		 * Wait up to one beacon interval ...
6146 		 * should this be more if we miss one?
6147 		 */
6148 		sdata_info(sdata, "waiting for beacon from %pM\n",
6149 			   ifmgd->bssid);
6150 		assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
6151 		assoc_data->timeout_started = true;
6152 		assoc_data->need_beacon = true;
6153 	} else if (beacon_ies) {
6154 		const struct element *elem;
6155 		u8 dtim_count = 0;
6156 
6157 		ieee80211_get_dtim(beacon_ies, &dtim_count,
6158 				   &ifmgd->dtim_period);
6159 
6160 		ifmgd->have_beacon = true;
6161 		assoc_data->timeout = jiffies;
6162 		assoc_data->timeout_started = true;
6163 
6164 		if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
6165 			sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
6166 			sdata->vif.bss_conf.sync_device_ts =
6167 				bss->device_ts_beacon;
6168 			sdata->vif.bss_conf.sync_dtim_count = dtim_count;
6169 		}
6170 
6171 		elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
6172 					      beacon_ies->data, beacon_ies->len);
6173 		if (elem && elem->datalen >= 3)
6174 			sdata->vif.bss_conf.profile_periodicity = elem->data[2];
6175 		else
6176 			sdata->vif.bss_conf.profile_periodicity = 0;
6177 
6178 		elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
6179 					  beacon_ies->data, beacon_ies->len);
6180 		if (elem && elem->datalen >= 11 &&
6181 		    (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
6182 			sdata->vif.bss_conf.ema_ap = true;
6183 		else
6184 			sdata->vif.bss_conf.ema_ap = false;
6185 	} else {
6186 		assoc_data->timeout = jiffies;
6187 		assoc_data->timeout_started = true;
6188 	}
6189 	rcu_read_unlock();
6190 
6191 	run_again(sdata, assoc_data->timeout);
6192 
6193 	if (bss->corrupt_data) {
6194 		char *corrupt_type = "data";
6195 		if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
6196 			if (bss->corrupt_data &
6197 					IEEE80211_BSS_CORRUPT_PROBE_RESP)
6198 				corrupt_type = "beacon and probe response";
6199 			else
6200 				corrupt_type = "beacon";
6201 		} else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
6202 			corrupt_type = "probe response";
6203 		sdata_info(sdata, "associating with AP with corrupt %s\n",
6204 			   corrupt_type);
6205 	}
6206 
6207 	return 0;
6208  err_clear:
6209 	eth_zero_addr(ifmgd->bssid);
6210 	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
6211 	ifmgd->assoc_data = NULL;
6212  err_free:
6213 	kfree(assoc_data);
6214 	return err;
6215 }
6216 
ieee80211_mgd_deauth(struct ieee80211_sub_if_data * sdata,struct cfg80211_deauth_request * req)6217 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
6218 			 struct cfg80211_deauth_request *req)
6219 {
6220 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6221 	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6222 	bool tx = !req->local_state_change;
6223 	struct ieee80211_prep_tx_info info = {
6224 		.subtype = IEEE80211_STYPE_DEAUTH,
6225 	};
6226 
6227 	if (ifmgd->auth_data &&
6228 	    ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
6229 		sdata_info(sdata,
6230 			   "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
6231 			   req->bssid, req->reason_code,
6232 			   ieee80211_get_reason_code_string(req->reason_code));
6233 
6234 		drv_mgd_prepare_tx(sdata->local, sdata, &info);
6235 		ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
6236 					       IEEE80211_STYPE_DEAUTH,
6237 					       req->reason_code, tx,
6238 					       frame_buf);
6239 		ieee80211_destroy_auth_data(sdata, false);
6240 		ieee80211_report_disconnect(sdata, frame_buf,
6241 					    sizeof(frame_buf), true,
6242 					    req->reason_code, false);
6243 		drv_mgd_complete_tx(sdata->local, sdata, &info);
6244 		return 0;
6245 	}
6246 
6247 	if (ifmgd->assoc_data &&
6248 	    ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
6249 		sdata_info(sdata,
6250 			   "aborting association with %pM by local choice (Reason: %u=%s)\n",
6251 			   req->bssid, req->reason_code,
6252 			   ieee80211_get_reason_code_string(req->reason_code));
6253 
6254 		drv_mgd_prepare_tx(sdata->local, sdata, &info);
6255 		ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
6256 					       IEEE80211_STYPE_DEAUTH,
6257 					       req->reason_code, tx,
6258 					       frame_buf);
6259 		ieee80211_destroy_assoc_data(sdata, false, true);
6260 		ieee80211_report_disconnect(sdata, frame_buf,
6261 					    sizeof(frame_buf), true,
6262 					    req->reason_code, false);
6263 		return 0;
6264 	}
6265 
6266 	if (ifmgd->associated &&
6267 	    ether_addr_equal(ifmgd->bssid, req->bssid)) {
6268 		sdata_info(sdata,
6269 			   "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
6270 			   req->bssid, req->reason_code,
6271 			   ieee80211_get_reason_code_string(req->reason_code));
6272 
6273 		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6274 				       req->reason_code, tx, frame_buf);
6275 		ieee80211_report_disconnect(sdata, frame_buf,
6276 					    sizeof(frame_buf), true,
6277 					    req->reason_code, false);
6278 		drv_mgd_complete_tx(sdata->local, sdata, &info);
6279 		return 0;
6280 	}
6281 
6282 	return -ENOTCONN;
6283 }
6284 
ieee80211_mgd_disassoc(struct ieee80211_sub_if_data * sdata,struct cfg80211_disassoc_request * req)6285 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
6286 			   struct cfg80211_disassoc_request *req)
6287 {
6288 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6289 	u8 bssid[ETH_ALEN];
6290 	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6291 
6292 	/*
6293 	 * cfg80211 should catch this ... but it's racy since
6294 	 * we can receive a disassoc frame, process it, hand it
6295 	 * to cfg80211 while that's in a locked section already
6296 	 * trying to tell us that the user wants to disconnect.
6297 	 */
6298 	if (ifmgd->assoc_bss != req->bss)
6299 		return -ENOLINK;
6300 
6301 	sdata_info(sdata,
6302 		   "disassociating from %pM by local choice (Reason: %u=%s)\n",
6303 		   req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
6304 
6305 	memcpy(bssid, req->bss->bssid, ETH_ALEN);
6306 	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
6307 			       req->reason_code, !req->local_state_change,
6308 			       frame_buf);
6309 
6310 	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
6311 				    req->reason_code, false);
6312 
6313 	return 0;
6314 }
6315 
ieee80211_mgd_stop(struct ieee80211_sub_if_data * sdata)6316 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
6317 {
6318 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6319 
6320 	/*
6321 	 * Make sure some work items will not run after this,
6322 	 * they will not do anything but might not have been
6323 	 * cancelled when disconnecting.
6324 	 */
6325 	cancel_work_sync(&ifmgd->monitor_work);
6326 	cancel_work_sync(&ifmgd->beacon_connection_loss_work);
6327 	cancel_work_sync(&ifmgd->request_smps_work);
6328 	cancel_work_sync(&ifmgd->csa_connection_drop_work);
6329 	cancel_work_sync(&ifmgd->chswitch_work);
6330 	cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
6331 
6332 	sdata_lock(sdata);
6333 	if (ifmgd->assoc_data) {
6334 		struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
6335 		ieee80211_destroy_assoc_data(sdata, false, false);
6336 		cfg80211_assoc_timeout(sdata->dev, bss);
6337 	}
6338 	if (ifmgd->auth_data)
6339 		ieee80211_destroy_auth_data(sdata, false);
6340 	spin_lock_bh(&ifmgd->teardown_lock);
6341 	if (ifmgd->teardown_skb) {
6342 		kfree_skb(ifmgd->teardown_skb);
6343 		ifmgd->teardown_skb = NULL;
6344 		ifmgd->orig_teardown_skb = NULL;
6345 	}
6346 	kfree(ifmgd->assoc_req_ies);
6347 	ifmgd->assoc_req_ies = NULL;
6348 	ifmgd->assoc_req_ies_len = 0;
6349 	spin_unlock_bh(&ifmgd->teardown_lock);
6350 	del_timer_sync(&ifmgd->timer);
6351 	sdata_unlock(sdata);
6352 }
6353 
ieee80211_cqm_rssi_notify(struct ieee80211_vif * vif,enum nl80211_cqm_rssi_threshold_event rssi_event,s32 rssi_level,gfp_t gfp)6354 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
6355 			       enum nl80211_cqm_rssi_threshold_event rssi_event,
6356 			       s32 rssi_level,
6357 			       gfp_t gfp)
6358 {
6359 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
6360 
6361 	trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
6362 
6363 	cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
6364 }
6365 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
6366 
ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif * vif,gfp_t gfp)6367 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
6368 {
6369 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
6370 
6371 	trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
6372 
6373 	cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
6374 }
6375 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
6376 
_ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data * sdata,int rssi_min_thold,int rssi_max_thold)6377 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
6378 					    int rssi_min_thold,
6379 					    int rssi_max_thold)
6380 {
6381 	trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
6382 
6383 	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
6384 		return;
6385 
6386 	/*
6387 	 * Scale up threshold values before storing it, as the RSSI averaging
6388 	 * algorithm uses a scaled up value as well. Change this scaling
6389 	 * factor if the RSSI averaging algorithm changes.
6390 	 */
6391 	sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
6392 	sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
6393 }
6394 
ieee80211_enable_rssi_reports(struct ieee80211_vif * vif,int rssi_min_thold,int rssi_max_thold)6395 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
6396 				    int rssi_min_thold,
6397 				    int rssi_max_thold)
6398 {
6399 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
6400 
6401 	WARN_ON(rssi_min_thold == rssi_max_thold ||
6402 		rssi_min_thold > rssi_max_thold);
6403 
6404 	_ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
6405 				       rssi_max_thold);
6406 }
6407 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
6408 
ieee80211_disable_rssi_reports(struct ieee80211_vif * vif)6409 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
6410 {
6411 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
6412 
6413 	_ieee80211_enable_rssi_reports(sdata, 0, 0);
6414 }
6415 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
6416