1// SPDX-License-Identifier: GPL-2.0
2/*
3 * SME code for cfg80211
4 * both driver SME event handling and the SME implementation
5 * (for nl80211's connect() and wext)
6 *
7 * Copyright 2009	Johannes Berg <johannes@sipsolutions.net>
8 * Copyright (C) 2009, 2020, 2022-2023 Intel Corporation. All rights reserved.
9 * Copyright 2017	Intel Deutschland GmbH
10 */
11
12#include <linux/etherdevice.h>
13#include <linux/if_arp.h>
14#include <linux/slab.h>
15#include <linux/workqueue.h>
16#include <linux/wireless.h>
17#include <linux/export.h>
18#include <net/iw_handler.h>
19#include <net/cfg80211.h>
20#include <net/rtnetlink.h>
21#include "nl80211.h"
22#include "reg.h"
23#include "rdev-ops.h"
24
25/*
26 * Software SME in cfg80211, using auth/assoc/deauth calls to the
27 * driver. This is for implementing nl80211's connect/disconnect
28 * and wireless extensions (if configured.)
29 */
30
31struct cfg80211_conn {
32	struct cfg80211_connect_params params;
33	/* these are sub-states of the _CONNECTING sme_state */
34	enum {
35		CFG80211_CONN_SCANNING,
36		CFG80211_CONN_SCAN_AGAIN,
37		CFG80211_CONN_AUTHENTICATE_NEXT,
38		CFG80211_CONN_AUTHENTICATING,
39		CFG80211_CONN_AUTH_FAILED_TIMEOUT,
40		CFG80211_CONN_ASSOCIATE_NEXT,
41		CFG80211_CONN_ASSOCIATING,
42		CFG80211_CONN_ASSOC_FAILED,
43		CFG80211_CONN_ASSOC_FAILED_TIMEOUT,
44		CFG80211_CONN_DEAUTH,
45		CFG80211_CONN_ABANDON,
46		CFG80211_CONN_CONNECTED,
47	} state;
48	u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
49	const u8 *ie;
50	size_t ie_len;
51	bool auto_auth, prev_bssid_valid;
52};
53
54static void cfg80211_sme_free(struct wireless_dev *wdev)
55{
56	if (!wdev->conn)
57		return;
58
59	kfree(wdev->conn->ie);
60	kfree(wdev->conn);
61	wdev->conn = NULL;
62}
63
64static int cfg80211_conn_scan(struct wireless_dev *wdev)
65{
66	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
67	struct cfg80211_scan_request *request;
68	int n_channels, err;
69
70	lockdep_assert_wiphy(wdev->wiphy);
71
72	if (rdev->scan_req || rdev->scan_msg)
73		return -EBUSY;
74
75	if (wdev->conn->params.channel)
76		n_channels = 1;
77	else
78		n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
79
80	request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
81			  sizeof(request->channels[0]) * n_channels,
82			  GFP_KERNEL);
83	if (!request)
84		return -ENOMEM;
85
86	if (wdev->conn->params.channel) {
87		enum nl80211_band band = wdev->conn->params.channel->band;
88		struct ieee80211_supported_band *sband =
89			wdev->wiphy->bands[band];
90
91		if (!sband) {
92			kfree(request);
93			return -EINVAL;
94		}
95		request->channels[0] = wdev->conn->params.channel;
96		request->rates[band] = (1 << sband->n_bitrates) - 1;
97	} else {
98		int i = 0, j;
99		enum nl80211_band band;
100		struct ieee80211_supported_band *bands;
101		struct ieee80211_channel *channel;
102
103		for (band = 0; band < NUM_NL80211_BANDS; band++) {
104			bands = wdev->wiphy->bands[band];
105			if (!bands)
106				continue;
107			for (j = 0; j < bands->n_channels; j++) {
108				channel = &bands->channels[j];
109				if (channel->flags & IEEE80211_CHAN_DISABLED)
110					continue;
111				request->channels[i++] = channel;
112			}
113			request->rates[band] = (1 << bands->n_bitrates) - 1;
114		}
115		n_channels = i;
116	}
117	request->n_channels = n_channels;
118	request->ssids = (void *)&request->channels[n_channels];
119	request->n_ssids = 1;
120
121	memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
122		wdev->conn->params.ssid_len);
123	request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
124
125	eth_broadcast_addr(request->bssid);
126
127	request->wdev = wdev;
128	request->wiphy = &rdev->wiphy;
129	request->scan_start = jiffies;
130
131	rdev->scan_req = request;
132
133	err = rdev_scan(rdev, request);
134	if (!err) {
135		wdev->conn->state = CFG80211_CONN_SCANNING;
136		nl80211_send_scan_start(rdev, wdev);
137		dev_hold(wdev->netdev);
138	} else {
139		rdev->scan_req = NULL;
140		kfree(request);
141	}
142	return err;
143}
144
145static int cfg80211_conn_do_work(struct wireless_dev *wdev,
146				 enum nl80211_timeout_reason *treason)
147{
148	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
149	struct cfg80211_connect_params *params;
150	struct cfg80211_auth_request auth_req = {};
151	struct cfg80211_assoc_request req = {};
152	int err;
153
154	lockdep_assert_wiphy(wdev->wiphy);
155
156	if (!wdev->conn)
157		return 0;
158
159	params = &wdev->conn->params;
160
161	switch (wdev->conn->state) {
162	case CFG80211_CONN_SCANNING:
163		/* didn't find it during scan ... */
164		return -ENOENT;
165	case CFG80211_CONN_SCAN_AGAIN:
166		return cfg80211_conn_scan(wdev);
167	case CFG80211_CONN_AUTHENTICATE_NEXT:
168		if (WARN_ON(!rdev->ops->auth))
169			return -EOPNOTSUPP;
170		wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
171		auth_req.key = params->key;
172		auth_req.key_len = params->key_len;
173		auth_req.key_idx = params->key_idx;
174		auth_req.auth_type = params->auth_type;
175		auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
176						params->bssid,
177						params->ssid, params->ssid_len,
178						IEEE80211_BSS_TYPE_ESS,
179						IEEE80211_PRIVACY_ANY);
180		auth_req.link_id = -1;
181		err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
182		cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
183		return err;
184	case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
185		*treason = NL80211_TIMEOUT_AUTH;
186		return -ENOTCONN;
187	case CFG80211_CONN_ASSOCIATE_NEXT:
188		if (WARN_ON(!rdev->ops->assoc))
189			return -EOPNOTSUPP;
190		wdev->conn->state = CFG80211_CONN_ASSOCIATING;
191		if (wdev->conn->prev_bssid_valid)
192			req.prev_bssid = wdev->conn->prev_bssid;
193		req.ie = params->ie;
194		req.ie_len = params->ie_len;
195		req.use_mfp = params->mfp != NL80211_MFP_NO;
196		req.crypto = params->crypto;
197		req.flags = params->flags;
198		req.ht_capa = params->ht_capa;
199		req.ht_capa_mask = params->ht_capa_mask;
200		req.vht_capa = params->vht_capa;
201		req.vht_capa_mask = params->vht_capa_mask;
202		req.link_id = -1;
203
204		req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
205					   params->bssid,
206					   params->ssid, params->ssid_len,
207					   IEEE80211_BSS_TYPE_ESS,
208					   IEEE80211_PRIVACY_ANY);
209		if (!req.bss) {
210			err = -ENOENT;
211		} else {
212			err = cfg80211_mlme_assoc(rdev, wdev->netdev,
213						  &req, NULL);
214			cfg80211_put_bss(&rdev->wiphy, req.bss);
215		}
216
217		if (err)
218			cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
219					     NULL, 0,
220					     WLAN_REASON_DEAUTH_LEAVING,
221					     false);
222		return err;
223	case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
224		*treason = NL80211_TIMEOUT_ASSOC;
225		fallthrough;
226	case CFG80211_CONN_ASSOC_FAILED:
227		cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
228				     NULL, 0,
229				     WLAN_REASON_DEAUTH_LEAVING, false);
230		return -ENOTCONN;
231	case CFG80211_CONN_DEAUTH:
232		cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
233				     NULL, 0,
234				     WLAN_REASON_DEAUTH_LEAVING, false);
235		fallthrough;
236	case CFG80211_CONN_ABANDON:
237		/* free directly, disconnected event already sent */
238		cfg80211_sme_free(wdev);
239		return 0;
240	default:
241		return 0;
242	}
243}
244
245void cfg80211_conn_work(struct work_struct *work)
246{
247	struct cfg80211_registered_device *rdev =
248		container_of(work, struct cfg80211_registered_device, conn_work);
249	struct wireless_dev *wdev;
250	u8 bssid_buf[ETH_ALEN], *bssid = NULL;
251	enum nl80211_timeout_reason treason;
252
253	wiphy_lock(&rdev->wiphy);
254
255	list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
256		if (!wdev->netdev)
257			continue;
258
259		if (!netif_running(wdev->netdev))
260			continue;
261
262		if (!wdev->conn ||
263		    wdev->conn->state == CFG80211_CONN_CONNECTED)
264			continue;
265
266		if (wdev->conn->params.bssid) {
267			memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
268			bssid = bssid_buf;
269		}
270		treason = NL80211_TIMEOUT_UNSPECIFIED;
271		if (cfg80211_conn_do_work(wdev, &treason)) {
272			struct cfg80211_connect_resp_params cr;
273
274			memset(&cr, 0, sizeof(cr));
275			cr.status = -1;
276			cr.links[0].bssid = bssid;
277			cr.timeout_reason = treason;
278			__cfg80211_connect_result(wdev->netdev, &cr, false);
279		}
280	}
281
282	wiphy_unlock(&rdev->wiphy);
283}
284
285static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
286				    struct cfg80211_bss *bss)
287{
288	memcpy(conn->bssid, bss->bssid, ETH_ALEN);
289	conn->params.bssid = conn->bssid;
290	conn->params.channel = bss->channel;
291	conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
292}
293
294/* Returned bss is reference counted and must be cleaned up appropriately. */
295static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
296{
297	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
298	struct cfg80211_bss *bss;
299
300	lockdep_assert_wiphy(wdev->wiphy);
301
302	bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
303			       wdev->conn->params.bssid,
304			       wdev->conn->params.ssid,
305			       wdev->conn->params.ssid_len,
306			       wdev->conn_bss_type,
307			       IEEE80211_PRIVACY(wdev->conn->params.privacy));
308	if (!bss)
309		return NULL;
310
311	cfg80211_step_auth_next(wdev->conn, bss);
312	schedule_work(&rdev->conn_work);
313
314	return bss;
315}
316
317void cfg80211_sme_scan_done(struct net_device *dev)
318{
319	struct wireless_dev *wdev = dev->ieee80211_ptr;
320	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
321	struct cfg80211_bss *bss;
322
323	lockdep_assert_wiphy(wdev->wiphy);
324
325	if (!wdev->conn)
326		return;
327
328	if (wdev->conn->state != CFG80211_CONN_SCANNING &&
329	    wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
330		return;
331
332	bss = cfg80211_get_conn_bss(wdev);
333	if (bss)
334		cfg80211_put_bss(&rdev->wiphy, bss);
335	else
336		schedule_work(&rdev->conn_work);
337}
338
339void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
340{
341	struct wiphy *wiphy = wdev->wiphy;
342	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
343	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
344	u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
345
346	lockdep_assert_wiphy(wdev->wiphy);
347
348	if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
349		return;
350
351	if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
352	    wdev->conn->auto_auth &&
353	    wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
354		/* select automatically between only open, shared, leap */
355		switch (wdev->conn->params.auth_type) {
356		case NL80211_AUTHTYPE_OPEN_SYSTEM:
357			if (wdev->connect_keys)
358				wdev->conn->params.auth_type =
359					NL80211_AUTHTYPE_SHARED_KEY;
360			else
361				wdev->conn->params.auth_type =
362					NL80211_AUTHTYPE_NETWORK_EAP;
363			break;
364		case NL80211_AUTHTYPE_SHARED_KEY:
365			wdev->conn->params.auth_type =
366				NL80211_AUTHTYPE_NETWORK_EAP;
367			break;
368		default:
369			/* huh? */
370			wdev->conn->params.auth_type =
371				NL80211_AUTHTYPE_OPEN_SYSTEM;
372			break;
373		}
374		wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
375		schedule_work(&rdev->conn_work);
376	} else if (status_code != WLAN_STATUS_SUCCESS) {
377		struct cfg80211_connect_resp_params cr;
378
379		memset(&cr, 0, sizeof(cr));
380		cr.status = status_code;
381		cr.links[0].bssid = mgmt->bssid;
382		cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
383		__cfg80211_connect_result(wdev->netdev, &cr, false);
384	} else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
385		wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
386		schedule_work(&rdev->conn_work);
387	}
388}
389
390bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
391{
392	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
393
394	if (!wdev->conn)
395		return false;
396
397	if (status == WLAN_STATUS_SUCCESS) {
398		wdev->conn->state = CFG80211_CONN_CONNECTED;
399		return false;
400	}
401
402	if (wdev->conn->prev_bssid_valid) {
403		/*
404		 * Some stupid APs don't accept reassoc, so we
405		 * need to fall back to trying regular assoc;
406		 * return true so no event is sent to userspace.
407		 */
408		wdev->conn->prev_bssid_valid = false;
409		wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
410		schedule_work(&rdev->conn_work);
411		return true;
412	}
413
414	wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
415	schedule_work(&rdev->conn_work);
416	return false;
417}
418
419void cfg80211_sme_deauth(struct wireless_dev *wdev)
420{
421	cfg80211_sme_free(wdev);
422}
423
424void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
425{
426	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
427
428	if (!wdev->conn)
429		return;
430
431	wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
432	schedule_work(&rdev->conn_work);
433}
434
435void cfg80211_sme_disassoc(struct wireless_dev *wdev)
436{
437	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
438
439	if (!wdev->conn)
440		return;
441
442	wdev->conn->state = CFG80211_CONN_DEAUTH;
443	schedule_work(&rdev->conn_work);
444}
445
446void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
447{
448	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
449
450	if (!wdev->conn)
451		return;
452
453	wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
454	schedule_work(&rdev->conn_work);
455}
456
457void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
458{
459	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
460
461	if (!wdev->conn)
462		return;
463
464	wdev->conn->state = CFG80211_CONN_ABANDON;
465	schedule_work(&rdev->conn_work);
466}
467
468static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
469{
470	unsigned int link;
471
472	for_each_valid_link(wdev, link) {
473		if (!wdev->links[link].client.current_bss)
474			continue;
475		cfg80211_unhold_bss(wdev->links[link].client.current_bss);
476		cfg80211_put_bss(wdev->wiphy,
477				 &wdev->links[link].client.current_bss->pub);
478		wdev->links[link].client.current_bss = NULL;
479	}
480}
481
482void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask)
483{
484	unsigned int link;
485
486	for_each_valid_link(wdev, link) {
487		if (!wdev->links[link].client.current_bss ||
488		    !(link_mask & BIT(link)))
489			continue;
490		cfg80211_unhold_bss(wdev->links[link].client.current_bss);
491		cfg80211_put_bss(wdev->wiphy,
492				 &wdev->links[link].client.current_bss->pub);
493		wdev->links[link].client.current_bss = NULL;
494	}
495}
496
497static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
498				     const u8 *ies, size_t ies_len,
499				     const u8 **out_ies, size_t *out_ies_len)
500{
501	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
502	u8 *buf;
503	size_t offs;
504
505	if (!rdev->wiphy.extended_capabilities_len ||
506	    (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
507		*out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
508		if (!*out_ies)
509			return -ENOMEM;
510		*out_ies_len = ies_len;
511		return 0;
512	}
513
514	buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
515		      GFP_KERNEL);
516	if (!buf)
517		return -ENOMEM;
518
519	if (ies_len) {
520		static const u8 before_extcapa[] = {
521			/* not listing IEs expected to be created by driver */
522			WLAN_EID_RSN,
523			WLAN_EID_QOS_CAPA,
524			WLAN_EID_RRM_ENABLED_CAPABILITIES,
525			WLAN_EID_MOBILITY_DOMAIN,
526			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
527			WLAN_EID_BSS_COEX_2040,
528		};
529
530		offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
531					  ARRAY_SIZE(before_extcapa), 0);
532		memcpy(buf, ies, offs);
533		/* leave a whole for extended capabilities IE */
534		memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
535		       ies + offs, ies_len - offs);
536	} else {
537		offs = 0;
538	}
539
540	/* place extended capabilities IE (with only driver capabilities) */
541	buf[offs] = WLAN_EID_EXT_CAPABILITY;
542	buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
543	memcpy(buf + offs + 2,
544	       rdev->wiphy.extended_capabilities,
545	       rdev->wiphy.extended_capabilities_len);
546
547	*out_ies = buf;
548	*out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
549
550	return 0;
551}
552
553static int cfg80211_sme_connect(struct wireless_dev *wdev,
554				struct cfg80211_connect_params *connect,
555				const u8 *prev_bssid)
556{
557	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
558	struct cfg80211_bss *bss;
559	int err;
560
561	if (!rdev->ops->auth || !rdev->ops->assoc)
562		return -EOPNOTSUPP;
563
564	cfg80211_wdev_release_bsses(wdev);
565
566	if (wdev->connected) {
567		cfg80211_sme_free(wdev);
568		wdev->connected = false;
569	}
570
571	if (wdev->conn)
572		return -EINPROGRESS;
573
574	wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
575	if (!wdev->conn)
576		return -ENOMEM;
577
578	/*
579	 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
580	 */
581	memcpy(&wdev->conn->params, connect, sizeof(*connect));
582	if (connect->bssid) {
583		wdev->conn->params.bssid = wdev->conn->bssid;
584		memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
585	}
586
587	if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
588				      &wdev->conn->ie,
589				      &wdev->conn->params.ie_len)) {
590		kfree(wdev->conn);
591		wdev->conn = NULL;
592		return -ENOMEM;
593	}
594	wdev->conn->params.ie = wdev->conn->ie;
595
596	if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
597		wdev->conn->auto_auth = true;
598		/* start with open system ... should mostly work */
599		wdev->conn->params.auth_type =
600			NL80211_AUTHTYPE_OPEN_SYSTEM;
601	} else {
602		wdev->conn->auto_auth = false;
603	}
604
605	wdev->conn->params.ssid = wdev->u.client.ssid;
606	wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
607
608	/* see if we have the bss already */
609	bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
610			       wdev->conn->params.bssid,
611			       wdev->conn->params.ssid,
612			       wdev->conn->params.ssid_len,
613			       wdev->conn_bss_type,
614			       IEEE80211_PRIVACY(wdev->conn->params.privacy));
615
616	if (prev_bssid) {
617		memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
618		wdev->conn->prev_bssid_valid = true;
619	}
620
621	/* we're good if we have a matching bss struct */
622	if (bss) {
623		enum nl80211_timeout_reason treason;
624
625		cfg80211_step_auth_next(wdev->conn, bss);
626		err = cfg80211_conn_do_work(wdev, &treason);
627		cfg80211_put_bss(wdev->wiphy, bss);
628	} else {
629		/* otherwise we'll need to scan for the AP first */
630		err = cfg80211_conn_scan(wdev);
631
632		/*
633		 * If we can't scan right now, then we need to scan again
634		 * after the current scan finished, since the parameters
635		 * changed (unless we find a good AP anyway).
636		 */
637		if (err == -EBUSY) {
638			err = 0;
639			wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
640		}
641	}
642
643	if (err)
644		cfg80211_sme_free(wdev);
645
646	return err;
647}
648
649static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
650{
651	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
652	int err;
653
654	if (!wdev->conn)
655		return 0;
656
657	if (!rdev->ops->deauth)
658		return -EOPNOTSUPP;
659
660	if (wdev->conn->state == CFG80211_CONN_SCANNING ||
661	    wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
662		err = 0;
663		goto out;
664	}
665
666	/* wdev->conn->params.bssid must be set if > SCANNING */
667	err = cfg80211_mlme_deauth(rdev, wdev->netdev,
668				   wdev->conn->params.bssid,
669				   NULL, 0, reason, false);
670 out:
671	cfg80211_sme_free(wdev);
672	return err;
673}
674
675/*
676 * code shared for in-device and software SME
677 */
678
679static bool cfg80211_is_all_idle(void)
680{
681	struct cfg80211_registered_device *rdev;
682	struct wireless_dev *wdev;
683	bool is_all_idle = true;
684
685	/*
686	 * All devices must be idle as otherwise if you are actively
687	 * scanning some new beacon hints could be learned and would
688	 * count as new regulatory hints.
689	 * Also if there is any other active beaconing interface we
690	 * need not issue a disconnect hint and reset any info such
691	 * as chan dfs state, etc.
692	 */
693	for_each_rdev(rdev) {
694		wiphy_lock(&rdev->wiphy);
695		list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
696			if (wdev->conn || wdev->connected ||
697			    cfg80211_beaconing_iface_active(wdev))
698				is_all_idle = false;
699		}
700		wiphy_unlock(&rdev->wiphy);
701	}
702
703	return is_all_idle;
704}
705
706static void disconnect_work(struct work_struct *work)
707{
708	rtnl_lock();
709	if (cfg80211_is_all_idle())
710		regulatory_hint_disconnect();
711	rtnl_unlock();
712}
713
714DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
715
716static void
717cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
718				      struct cfg80211_connect_resp_params *cr)
719{
720	unsigned int link;
721
722	for_each_valid_link(cr, link) {
723		if (!cr->links[link].bss)
724			continue;
725		cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
726		cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
727	}
728}
729
730/*
731 * API calls for drivers implementing connect/disconnect and
732 * SME event handling
733 */
734
735/* This method must consume bss one way or another */
736void __cfg80211_connect_result(struct net_device *dev,
737			       struct cfg80211_connect_resp_params *cr,
738			       bool wextev)
739{
740	struct wireless_dev *wdev = dev->ieee80211_ptr;
741	const struct element *country_elem = NULL;
742	const struct element *ssid;
743	const u8 *country_data;
744	u8 country_datalen;
745#ifdef CONFIG_CFG80211_WEXT
746	union iwreq_data wrqu;
747#endif
748	unsigned int link;
749	const u8 *connected_addr;
750	bool bss_not_found = false;
751
752	lockdep_assert_wiphy(wdev->wiphy);
753
754	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
755		    wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
756		goto out;
757
758	if (cr->valid_links) {
759		if (WARN_ON(!cr->ap_mld_addr))
760			goto out;
761
762		for_each_valid_link(cr, link) {
763			if (WARN_ON(!cr->links[link].addr))
764				goto out;
765		}
766
767		if (WARN_ON(wdev->connect_keys))
768			goto out;
769	}
770
771	wdev->unprot_beacon_reported = 0;
772	nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
773				    GFP_KERNEL);
774	connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
775
776#ifdef CONFIG_CFG80211_WEXT
777	if (wextev && !cr->valid_links) {
778		if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
779			memset(&wrqu, 0, sizeof(wrqu));
780			wrqu.data.length = cr->req_ie_len;
781			wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
782					    cr->req_ie);
783		}
784
785		if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
786			memset(&wrqu, 0, sizeof(wrqu));
787			wrqu.data.length = cr->resp_ie_len;
788			wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
789					    cr->resp_ie);
790		}
791
792		memset(&wrqu, 0, sizeof(wrqu));
793		wrqu.ap_addr.sa_family = ARPHRD_ETHER;
794		if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
795			memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
796			memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
797			wdev->wext.prev_bssid_valid = true;
798		}
799		wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
800	}
801#endif
802
803	if (cr->status == WLAN_STATUS_SUCCESS) {
804		if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
805			for_each_valid_link(cr, link) {
806				if (WARN_ON_ONCE(!cr->links[link].bss))
807					break;
808			}
809		}
810
811		for_each_valid_link(cr, link) {
812			/* don't do extra lookups for failures */
813			if (cr->links[link].status != WLAN_STATUS_SUCCESS)
814				continue;
815
816			if (cr->links[link].bss)
817				continue;
818
819			cr->links[link].bss =
820				cfg80211_get_bss(wdev->wiphy, NULL,
821						 cr->links[link].bssid,
822						 wdev->u.client.ssid,
823						 wdev->u.client.ssid_len,
824						 wdev->conn_bss_type,
825						 IEEE80211_PRIVACY_ANY);
826			if (!cr->links[link].bss) {
827				bss_not_found = true;
828				break;
829			}
830			cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
831		}
832	}
833
834	cfg80211_wdev_release_bsses(wdev);
835
836	if (cr->status != WLAN_STATUS_SUCCESS) {
837		kfree_sensitive(wdev->connect_keys);
838		wdev->connect_keys = NULL;
839		wdev->u.client.ssid_len = 0;
840		wdev->conn_owner_nlportid = 0;
841		cfg80211_connect_result_release_bsses(wdev, cr);
842		cfg80211_sme_free(wdev);
843		return;
844	}
845
846	if (WARN_ON(bss_not_found)) {
847		cfg80211_connect_result_release_bsses(wdev, cr);
848		return;
849	}
850
851	memset(wdev->links, 0, sizeof(wdev->links));
852	for_each_valid_link(cr, link) {
853		if (cr->links[link].status == WLAN_STATUS_SUCCESS)
854			continue;
855		cr->valid_links &= ~BIT(link);
856		/* don't require bss pointer for failed links */
857		if (!cr->links[link].bss)
858			continue;
859		cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
860		cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
861	}
862	wdev->valid_links = cr->valid_links;
863	for_each_valid_link(cr, link)
864		wdev->links[link].client.current_bss =
865			bss_from_pub(cr->links[link].bss);
866	wdev->connected = true;
867	ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
868	if (cr->valid_links) {
869		for_each_valid_link(cr, link)
870			memcpy(wdev->links[link].addr, cr->links[link].addr,
871			       ETH_ALEN);
872	}
873
874	cfg80211_upload_connect_keys(wdev);
875
876	rcu_read_lock();
877	for_each_valid_link(cr, link) {
878		country_elem =
879			ieee80211_bss_get_elem(cr->links[link].bss,
880					       WLAN_EID_COUNTRY);
881		if (country_elem)
882			break;
883	}
884	if (!country_elem) {
885		rcu_read_unlock();
886		return;
887	}
888
889	country_datalen = country_elem->datalen;
890	country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
891	rcu_read_unlock();
892
893	if (!country_data)
894		return;
895
896	regulatory_hint_country_ie(wdev->wiphy,
897				   cr->links[link].bss->channel->band,
898				   country_data, country_datalen);
899	kfree(country_data);
900
901	if (!wdev->u.client.ssid_len) {
902		rcu_read_lock();
903		for_each_valid_link(cr, link) {
904			ssid = ieee80211_bss_get_elem(cr->links[link].bss,
905						      WLAN_EID_SSID);
906
907			if (!ssid || !ssid->datalen)
908				continue;
909
910			memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
911			wdev->u.client.ssid_len = ssid->datalen;
912			break;
913		}
914		rcu_read_unlock();
915	}
916
917	return;
918out:
919	for_each_valid_link(cr, link)
920		cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
921}
922
923static void cfg80211_update_link_bss(struct wireless_dev *wdev,
924				     struct cfg80211_bss **bss)
925{
926	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
927	struct cfg80211_internal_bss *ibss;
928
929	if (!*bss)
930		return;
931
932	ibss = bss_from_pub(*bss);
933	if (list_empty(&ibss->list)) {
934		struct cfg80211_bss *found = NULL, *tmp = *bss;
935
936		found = cfg80211_get_bss(wdev->wiphy, NULL,
937					 (*bss)->bssid,
938					 wdev->u.client.ssid,
939					 wdev->u.client.ssid_len,
940					 wdev->conn_bss_type,
941					 IEEE80211_PRIVACY_ANY);
942		if (found) {
943			/* The same BSS is already updated so use it
944			 * instead, as it has latest info.
945			 */
946			*bss = found;
947		} else {
948			/* Update with BSS provided by driver, it will
949			 * be freshly added and ref cnted, we can free
950			 * the old one.
951			 *
952			 * signal_valid can be false, as we are not
953			 * expecting the BSS to be found.
954			 *
955			 * keep the old timestamp to avoid confusion
956			 */
957			cfg80211_bss_update(rdev, ibss, false,
958					    ibss->ts);
959		}
960
961		cfg80211_put_bss(wdev->wiphy, tmp);
962	}
963}
964
965/* Consumes bss object(s) one way or another */
966void cfg80211_connect_done(struct net_device *dev,
967			   struct cfg80211_connect_resp_params *params,
968			   gfp_t gfp)
969{
970	struct wireless_dev *wdev = dev->ieee80211_ptr;
971	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
972	struct cfg80211_event *ev;
973	unsigned long flags;
974	u8 *next;
975	size_t link_info_size = 0;
976	unsigned int link;
977
978	for_each_valid_link(params, link) {
979		cfg80211_update_link_bss(wdev, &params->links[link].bss);
980		link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
981		link_info_size += params->links[link].addr ? ETH_ALEN : 0;
982	}
983
984	ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
985		     params->req_ie_len + params->resp_ie_len +
986		     params->fils.kek_len + params->fils.pmk_len +
987		     (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
988		     gfp);
989
990	if (!ev) {
991		for_each_valid_link(params, link)
992			cfg80211_put_bss(wdev->wiphy,
993					 params->links[link].bss);
994		return;
995	}
996
997	ev->type = EVENT_CONNECT_RESULT;
998	next = ((u8 *)ev) + sizeof(*ev);
999	if (params->ap_mld_addr) {
1000		ev->cr.ap_mld_addr = next;
1001		memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
1002		       ETH_ALEN);
1003		next += ETH_ALEN;
1004	}
1005	if (params->req_ie_len) {
1006		ev->cr.req_ie = next;
1007		ev->cr.req_ie_len = params->req_ie_len;
1008		memcpy((void *)ev->cr.req_ie, params->req_ie,
1009		       params->req_ie_len);
1010		next += params->req_ie_len;
1011	}
1012	if (params->resp_ie_len) {
1013		ev->cr.resp_ie = next;
1014		ev->cr.resp_ie_len = params->resp_ie_len;
1015		memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1016		       params->resp_ie_len);
1017		next += params->resp_ie_len;
1018	}
1019	if (params->fils.kek_len) {
1020		ev->cr.fils.kek = next;
1021		ev->cr.fils.kek_len = params->fils.kek_len;
1022		memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1023		       params->fils.kek_len);
1024		next += params->fils.kek_len;
1025	}
1026	if (params->fils.pmk_len) {
1027		ev->cr.fils.pmk = next;
1028		ev->cr.fils.pmk_len = params->fils.pmk_len;
1029		memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1030		       params->fils.pmk_len);
1031		next += params->fils.pmk_len;
1032	}
1033	if (params->fils.pmkid) {
1034		ev->cr.fils.pmkid = next;
1035		memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1036		       WLAN_PMKID_LEN);
1037		next += WLAN_PMKID_LEN;
1038	}
1039	ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1040	if (params->fils.update_erp_next_seq_num)
1041		ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1042	ev->cr.valid_links = params->valid_links;
1043	for_each_valid_link(params, link) {
1044		if (params->links[link].bss)
1045			cfg80211_hold_bss(
1046				bss_from_pub(params->links[link].bss));
1047		ev->cr.links[link].bss = params->links[link].bss;
1048
1049		if (params->links[link].addr) {
1050			ev->cr.links[link].addr = next;
1051			memcpy((void *)ev->cr.links[link].addr,
1052			       params->links[link].addr,
1053			       ETH_ALEN);
1054			next += ETH_ALEN;
1055		}
1056		if (params->links[link].bssid) {
1057			ev->cr.links[link].bssid = next;
1058			memcpy((void *)ev->cr.links[link].bssid,
1059			       params->links[link].bssid,
1060			       ETH_ALEN);
1061			next += ETH_ALEN;
1062		}
1063	}
1064	ev->cr.status = params->status;
1065	ev->cr.timeout_reason = params->timeout_reason;
1066
1067	spin_lock_irqsave(&wdev->event_lock, flags);
1068	list_add_tail(&ev->list, &wdev->event_list);
1069	spin_unlock_irqrestore(&wdev->event_lock, flags);
1070	queue_work(cfg80211_wq, &rdev->event_work);
1071}
1072EXPORT_SYMBOL(cfg80211_connect_done);
1073
1074/* Consumes bss object one way or another */
1075void __cfg80211_roamed(struct wireless_dev *wdev,
1076		       struct cfg80211_roam_info *info)
1077{
1078#ifdef CONFIG_CFG80211_WEXT
1079	union iwreq_data wrqu;
1080#endif
1081	unsigned int link;
1082	const u8 *connected_addr;
1083
1084	lockdep_assert_wiphy(wdev->wiphy);
1085
1086	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1087		    wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1088		goto out;
1089
1090	if (WARN_ON(!wdev->connected))
1091		goto out;
1092
1093	if (info->valid_links) {
1094		if (WARN_ON(!info->ap_mld_addr))
1095			goto out;
1096
1097		for_each_valid_link(info, link) {
1098			if (WARN_ON(!info->links[link].addr))
1099				goto out;
1100		}
1101	}
1102
1103	cfg80211_wdev_release_bsses(wdev);
1104
1105	for_each_valid_link(info, link) {
1106		if (WARN_ON(!info->links[link].bss))
1107			goto out;
1108	}
1109
1110	memset(wdev->links, 0, sizeof(wdev->links));
1111	wdev->valid_links = info->valid_links;
1112	for_each_valid_link(info, link) {
1113		cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1114		wdev->links[link].client.current_bss =
1115			bss_from_pub(info->links[link].bss);
1116	}
1117
1118	connected_addr = info->valid_links ?
1119			 info->ap_mld_addr :
1120			 info->links[0].bss->bssid;
1121	ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1122	if (info->valid_links) {
1123		for_each_valid_link(info, link)
1124			memcpy(wdev->links[link].addr, info->links[link].addr,
1125			       ETH_ALEN);
1126	}
1127	wdev->unprot_beacon_reported = 0;
1128	nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1129			    wdev->netdev, info, GFP_KERNEL);
1130
1131#ifdef CONFIG_CFG80211_WEXT
1132	if (!info->valid_links) {
1133		if (info->req_ie) {
1134			memset(&wrqu, 0, sizeof(wrqu));
1135			wrqu.data.length = info->req_ie_len;
1136			wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1137					    &wrqu, info->req_ie);
1138		}
1139
1140		if (info->resp_ie) {
1141			memset(&wrqu, 0, sizeof(wrqu));
1142			wrqu.data.length = info->resp_ie_len;
1143			wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1144					    &wrqu, info->resp_ie);
1145		}
1146
1147		memset(&wrqu, 0, sizeof(wrqu));
1148		wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1149		memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1150		memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1151		wdev->wext.prev_bssid_valid = true;
1152		wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1153	}
1154#endif
1155
1156	return;
1157out:
1158	for_each_valid_link(info, link)
1159		cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1160}
1161
1162/* Consumes info->links.bss object(s) one way or another */
1163void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1164		     gfp_t gfp)
1165{
1166	struct wireless_dev *wdev = dev->ieee80211_ptr;
1167	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1168	struct cfg80211_event *ev;
1169	unsigned long flags;
1170	u8 *next;
1171	unsigned int link;
1172	size_t link_info_size = 0;
1173	bool bss_not_found = false;
1174
1175	for_each_valid_link(info, link) {
1176		link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1177		link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1178
1179		if (info->links[link].bss)
1180			continue;
1181
1182		info->links[link].bss =
1183			cfg80211_get_bss(wdev->wiphy,
1184					 info->links[link].channel,
1185					 info->links[link].bssid,
1186					 wdev->u.client.ssid,
1187					 wdev->u.client.ssid_len,
1188					 wdev->conn_bss_type,
1189					 IEEE80211_PRIVACY_ANY);
1190
1191		if (!info->links[link].bss) {
1192			bss_not_found = true;
1193			break;
1194		}
1195	}
1196
1197	if (WARN_ON(bss_not_found))
1198		goto out;
1199
1200	ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1201		     info->fils.kek_len + info->fils.pmk_len +
1202		     (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1203		     (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1204	if (!ev)
1205		goto out;
1206
1207	ev->type = EVENT_ROAMED;
1208	next = ((u8 *)ev) + sizeof(*ev);
1209	if (info->req_ie_len) {
1210		ev->rm.req_ie = next;
1211		ev->rm.req_ie_len = info->req_ie_len;
1212		memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1213		next += info->req_ie_len;
1214	}
1215	if (info->resp_ie_len) {
1216		ev->rm.resp_ie = next;
1217		ev->rm.resp_ie_len = info->resp_ie_len;
1218		memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1219		       info->resp_ie_len);
1220		next += info->resp_ie_len;
1221	}
1222	if (info->fils.kek_len) {
1223		ev->rm.fils.kek = next;
1224		ev->rm.fils.kek_len = info->fils.kek_len;
1225		memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1226		       info->fils.kek_len);
1227		next += info->fils.kek_len;
1228	}
1229	if (info->fils.pmk_len) {
1230		ev->rm.fils.pmk = next;
1231		ev->rm.fils.pmk_len = info->fils.pmk_len;
1232		memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1233		       info->fils.pmk_len);
1234		next += info->fils.pmk_len;
1235	}
1236	if (info->fils.pmkid) {
1237		ev->rm.fils.pmkid = next;
1238		memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1239		       WLAN_PMKID_LEN);
1240		next += WLAN_PMKID_LEN;
1241	}
1242	ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1243	if (info->fils.update_erp_next_seq_num)
1244		ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1245	if (info->ap_mld_addr) {
1246		ev->rm.ap_mld_addr = next;
1247		memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1248		       ETH_ALEN);
1249		next += ETH_ALEN;
1250	}
1251	ev->rm.valid_links = info->valid_links;
1252	for_each_valid_link(info, link) {
1253		ev->rm.links[link].bss = info->links[link].bss;
1254
1255		if (info->links[link].addr) {
1256			ev->rm.links[link].addr = next;
1257			memcpy((void *)ev->rm.links[link].addr,
1258			       info->links[link].addr,
1259			       ETH_ALEN);
1260			next += ETH_ALEN;
1261		}
1262
1263		if (info->links[link].bssid) {
1264			ev->rm.links[link].bssid = next;
1265			memcpy((void *)ev->rm.links[link].bssid,
1266			       info->links[link].bssid,
1267			       ETH_ALEN);
1268			next += ETH_ALEN;
1269		}
1270	}
1271
1272	spin_lock_irqsave(&wdev->event_lock, flags);
1273	list_add_tail(&ev->list, &wdev->event_list);
1274	spin_unlock_irqrestore(&wdev->event_lock, flags);
1275	queue_work(cfg80211_wq, &rdev->event_work);
1276
1277	return;
1278out:
1279	for_each_valid_link(info, link)
1280		cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1281
1282}
1283EXPORT_SYMBOL(cfg80211_roamed);
1284
1285void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr,
1286					const u8 *td_bitmap, u8 td_bitmap_len)
1287{
1288	lockdep_assert_wiphy(wdev->wiphy);
1289
1290	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1291		wdev->iftype != NL80211_IFTYPE_P2P_CLIENT &&
1292		wdev->iftype != NL80211_IFTYPE_AP &&
1293		wdev->iftype != NL80211_IFTYPE_P2P_GO))
1294		return;
1295
1296	if (wdev->iftype == NL80211_IFTYPE_STATION ||
1297		wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1298		if (WARN_ON(!wdev->connected) ||
1299			WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, peer_addr)))
1300			return;
1301	}
1302
1303	nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1304				     peer_addr, td_bitmap, td_bitmap_len);
1305}
1306
1307void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr,
1308			      const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1309{
1310	struct wireless_dev *wdev = dev->ieee80211_ptr;
1311	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1312	struct cfg80211_event *ev;
1313	unsigned long flags;
1314
1315	if (WARN_ON(!peer_addr))
1316		return;
1317
1318	ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1319	if (!ev)
1320		return;
1321
1322	ev->type = EVENT_PORT_AUTHORIZED;
1323	memcpy(ev->pa.peer_addr, peer_addr, ETH_ALEN);
1324	ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1325	ev->pa.td_bitmap_len = td_bitmap_len;
1326	memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1327
1328	/*
1329	 * Use the wdev event list so that if there are pending
1330	 * connected/roamed events, they will be reported first.
1331	 */
1332	spin_lock_irqsave(&wdev->event_lock, flags);
1333	list_add_tail(&ev->list, &wdev->event_list);
1334	spin_unlock_irqrestore(&wdev->event_lock, flags);
1335	queue_work(cfg80211_wq, &rdev->event_work);
1336}
1337EXPORT_SYMBOL(cfg80211_port_authorized);
1338
1339void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1340			     size_t ie_len, u16 reason, bool from_ap)
1341{
1342	struct wireless_dev *wdev = dev->ieee80211_ptr;
1343	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1344	int i;
1345#ifdef CONFIG_CFG80211_WEXT
1346	union iwreq_data wrqu;
1347#endif
1348
1349	lockdep_assert_wiphy(wdev->wiphy);
1350
1351	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1352		    wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1353		return;
1354
1355	cfg80211_wdev_release_bsses(wdev);
1356	wdev->connected = false;
1357	wdev->u.client.ssid_len = 0;
1358	wdev->conn_owner_nlportid = 0;
1359	kfree_sensitive(wdev->connect_keys);
1360	wdev->connect_keys = NULL;
1361
1362	nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1363
1364	/* stop critical protocol if supported */
1365	if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1366		rdev->crit_proto_nlportid = 0;
1367		rdev_crit_proto_stop(rdev, wdev);
1368	}
1369
1370	/*
1371	 * Delete all the keys ... pairwise keys can't really
1372	 * exist any more anyway, but default keys might.
1373	 */
1374	if (rdev->ops->del_key) {
1375		int max_key_idx = 5;
1376
1377		if (wiphy_ext_feature_isset(
1378			    wdev->wiphy,
1379			    NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1380		    wiphy_ext_feature_isset(
1381			    wdev->wiphy,
1382			    NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1383			max_key_idx = 7;
1384		for (i = 0; i <= max_key_idx; i++)
1385			rdev_del_key(rdev, dev, -1, i, false, NULL);
1386	}
1387
1388	rdev_set_qos_map(rdev, dev, NULL);
1389
1390#ifdef CONFIG_CFG80211_WEXT
1391	memset(&wrqu, 0, sizeof(wrqu));
1392	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1393	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1394	wdev->wext.connect.ssid_len = 0;
1395#endif
1396
1397	schedule_work(&cfg80211_disconnect_work);
1398
1399	cfg80211_schedule_channels_check(wdev);
1400}
1401
1402void cfg80211_disconnected(struct net_device *dev, u16 reason,
1403			   const u8 *ie, size_t ie_len,
1404			   bool locally_generated, gfp_t gfp)
1405{
1406	struct wireless_dev *wdev = dev->ieee80211_ptr;
1407	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1408	struct cfg80211_event *ev;
1409	unsigned long flags;
1410
1411	ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1412	if (!ev)
1413		return;
1414
1415	ev->type = EVENT_DISCONNECTED;
1416	ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1417	ev->dc.ie_len = ie_len;
1418	memcpy((void *)ev->dc.ie, ie, ie_len);
1419	ev->dc.reason = reason;
1420	ev->dc.locally_generated = locally_generated;
1421
1422	spin_lock_irqsave(&wdev->event_lock, flags);
1423	list_add_tail(&ev->list, &wdev->event_list);
1424	spin_unlock_irqrestore(&wdev->event_lock, flags);
1425	queue_work(cfg80211_wq, &rdev->event_work);
1426}
1427EXPORT_SYMBOL(cfg80211_disconnected);
1428
1429/*
1430 * API calls for nl80211/wext compatibility code
1431 */
1432int cfg80211_connect(struct cfg80211_registered_device *rdev,
1433		     struct net_device *dev,
1434		     struct cfg80211_connect_params *connect,
1435		     struct cfg80211_cached_keys *connkeys,
1436		     const u8 *prev_bssid)
1437{
1438	struct wireless_dev *wdev = dev->ieee80211_ptr;
1439	int err;
1440
1441	lockdep_assert_wiphy(wdev->wiphy);
1442
1443	/*
1444	 * If we have an ssid_len, we're trying to connect or are
1445	 * already connected, so reject a new SSID unless it's the
1446	 * same (which is the case for re-association.)
1447	 */
1448	if (wdev->u.client.ssid_len &&
1449	    (wdev->u.client.ssid_len != connect->ssid_len ||
1450	     memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1451		return -EALREADY;
1452
1453	/*
1454	 * If connected, reject (re-)association unless prev_bssid
1455	 * matches the current BSSID.
1456	 */
1457	if (wdev->connected) {
1458		if (!prev_bssid)
1459			return -EALREADY;
1460		if (!ether_addr_equal(prev_bssid,
1461				      wdev->u.client.connected_addr))
1462			return -ENOTCONN;
1463	}
1464
1465	/*
1466	 * Reject if we're in the process of connecting with WEP,
1467	 * this case isn't very interesting and trying to handle
1468	 * it would make the code much more complex.
1469	 */
1470	if (wdev->connect_keys)
1471		return -EINPROGRESS;
1472
1473	cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1474				  rdev->wiphy.ht_capa_mod_mask);
1475	cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1476				   rdev->wiphy.vht_capa_mod_mask);
1477
1478	if (connkeys && connkeys->def >= 0) {
1479		int idx;
1480		u32 cipher;
1481
1482		idx = connkeys->def;
1483		cipher = connkeys->params[idx].cipher;
1484		/* If given a WEP key we may need it for shared key auth */
1485		if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1486		    cipher == WLAN_CIPHER_SUITE_WEP104) {
1487			connect->key_idx = idx;
1488			connect->key = connkeys->params[idx].key;
1489			connect->key_len = connkeys->params[idx].key_len;
1490
1491			/*
1492			 * If ciphers are not set (e.g. when going through
1493			 * iwconfig), we have to set them appropriately here.
1494			 */
1495			if (connect->crypto.cipher_group == 0)
1496				connect->crypto.cipher_group = cipher;
1497
1498			if (connect->crypto.n_ciphers_pairwise == 0) {
1499				connect->crypto.n_ciphers_pairwise = 1;
1500				connect->crypto.ciphers_pairwise[0] = cipher;
1501			}
1502		}
1503	} else {
1504		if (WARN_ON(connkeys))
1505			return -EINVAL;
1506
1507		/* connect can point to wdev->wext.connect which
1508		 * can hold key data from a previous connection
1509		 */
1510		connect->key = NULL;
1511		connect->key_len = 0;
1512		connect->key_idx = 0;
1513	}
1514
1515	wdev->connect_keys = connkeys;
1516	memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1517	wdev->u.client.ssid_len = connect->ssid_len;
1518
1519	wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1520					      IEEE80211_BSS_TYPE_ESS;
1521
1522	if (!rdev->ops->connect)
1523		err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1524	else
1525		err = rdev_connect(rdev, dev, connect);
1526
1527	if (err) {
1528		wdev->connect_keys = NULL;
1529		/*
1530		 * This could be reassoc getting refused, don't clear
1531		 * ssid_len in that case.
1532		 */
1533		if (!wdev->connected)
1534			wdev->u.client.ssid_len = 0;
1535		return err;
1536	}
1537
1538	return 0;
1539}
1540
1541int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1542			struct net_device *dev, u16 reason, bool wextev)
1543{
1544	struct wireless_dev *wdev = dev->ieee80211_ptr;
1545	int err = 0;
1546
1547	lockdep_assert_wiphy(wdev->wiphy);
1548
1549	kfree_sensitive(wdev->connect_keys);
1550	wdev->connect_keys = NULL;
1551
1552	wdev->conn_owner_nlportid = 0;
1553
1554	if (wdev->conn)
1555		err = cfg80211_sme_disconnect(wdev, reason);
1556	else if (!rdev->ops->disconnect)
1557		cfg80211_mlme_down(rdev, dev);
1558	else if (wdev->u.client.ssid_len)
1559		err = rdev_disconnect(rdev, dev, reason);
1560
1561	/*
1562	 * Clear ssid_len unless we actually were fully connected,
1563	 * in which case cfg80211_disconnected() will take care of
1564	 * this later.
1565	 */
1566	if (!wdev->connected)
1567		wdev->u.client.ssid_len = 0;
1568
1569	return err;
1570}
1571
1572/*
1573 * Used to clean up after the connection / connection attempt owner socket
1574 * disconnects
1575 */
1576void cfg80211_autodisconnect_wk(struct work_struct *work)
1577{
1578	struct wireless_dev *wdev =
1579		container_of(work, struct wireless_dev, disconnect_wk);
1580	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1581
1582	wiphy_lock(wdev->wiphy);
1583
1584	if (wdev->conn_owner_nlportid) {
1585		switch (wdev->iftype) {
1586		case NL80211_IFTYPE_ADHOC:
1587			cfg80211_leave_ibss(rdev, wdev->netdev, false);
1588			break;
1589		case NL80211_IFTYPE_AP:
1590		case NL80211_IFTYPE_P2P_GO:
1591			cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1592			break;
1593		case NL80211_IFTYPE_MESH_POINT:
1594			cfg80211_leave_mesh(rdev, wdev->netdev);
1595			break;
1596		case NL80211_IFTYPE_STATION:
1597		case NL80211_IFTYPE_P2P_CLIENT:
1598			/*
1599			 * Use disconnect_bssid if still connecting and
1600			 * ops->disconnect not implemented.  Otherwise we can
1601			 * use cfg80211_disconnect.
1602			 */
1603			if (rdev->ops->disconnect || wdev->connected)
1604				cfg80211_disconnect(rdev, wdev->netdev,
1605						    WLAN_REASON_DEAUTH_LEAVING,
1606						    true);
1607			else
1608				cfg80211_mlme_deauth(rdev, wdev->netdev,
1609						     wdev->disconnect_bssid,
1610						     NULL, 0,
1611						     WLAN_REASON_DEAUTH_LEAVING,
1612						     false);
1613			break;
1614		default:
1615			break;
1616		}
1617	}
1618
1619	wiphy_unlock(wdev->wiphy);
1620}
1621