sme.c

   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, 2022-2025 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_int *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->req.ssids[0]) +
  81			  sizeof(request->req.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->req.channels[0] = wdev->conn->params.channel;
  96		request->req.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->req.channels[i++] = channel;
 112			}
 113			request->req.rates[band] = (1 << bands->n_bitrates) - 1;
 114		}
 115		n_channels = i;
 116	}
 117	request->req.n_channels = n_channels;
 118	request->req.ssids = (void *)request +
 119			     struct_size(request, req.channels, n_channels);
 120	request->req.n_ssids = 1;
 121
 122	memcpy(request->req.ssids[0].ssid, wdev->conn->params.ssid,
 123	       wdev->conn->params.ssid_len);
 124	request->req.ssids[0].ssid_len = wdev->conn->params.ssid_len;
 125
 126	eth_broadcast_addr(request->req.bssid);
 127
 128	request->req.wdev = wdev;
 129	request->req.wiphy = &rdev->wiphy;
 130	request->req.scan_start = jiffies;
 131
 132	rdev->scan_req = request;
 133
 134	err = cfg80211_scan(rdev);
 135	if (!err) {
 136		wdev->conn->state = CFG80211_CONN_SCANNING;
 137		nl80211_send_scan_start(rdev, wdev);
 138		dev_hold(wdev->netdev);
 139	} else {
 140		rdev->scan_req = NULL;
 141		kfree(request);
 142	}
 143	return err;
 144}
 145
 146static int cfg80211_conn_do_work(struct wireless_dev *wdev,
 147				 enum nl80211_timeout_reason *treason)
 148{
 149	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 150	struct cfg80211_connect_params *params;
 151	struct cfg80211_auth_request auth_req = {};
 152	struct cfg80211_assoc_request req = {};
 153	int err;
 154
 155	lockdep_assert_wiphy(wdev->wiphy);
 156
 157	if (!wdev->conn)
 158		return 0;
 159
 160	params = &wdev->conn->params;
 161
 162	switch (wdev->conn->state) {
 163	case CFG80211_CONN_SCANNING:
 164		/* didn't find it during scan ... */
 165		return -ENOENT;
 166	case CFG80211_CONN_SCAN_AGAIN:
 167		return cfg80211_conn_scan(wdev);
 168	case CFG80211_CONN_AUTHENTICATE_NEXT:
 169		if (WARN_ON(!rdev->ops->auth))
 170			return -EOPNOTSUPP;
 171		wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 172		auth_req.key = params->key;
 173		auth_req.key_len = params->key_len;
 174		auth_req.key_idx = params->key_idx;
 175		auth_req.auth_type = params->auth_type;
 176		auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
 177						params->bssid,
 178						params->ssid, params->ssid_len,
 179						IEEE80211_BSS_TYPE_ESS,
 180						IEEE80211_PRIVACY_ANY);
 181		auth_req.link_id = -1;
 182		err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
 183		cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
 184		return err;
 185	case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
 186		*treason = NL80211_TIMEOUT_AUTH;
 187		return -ENOTCONN;
 188	case CFG80211_CONN_ASSOCIATE_NEXT:
 189		if (WARN_ON(!rdev->ops->assoc))
 190			return -EOPNOTSUPP;
 191		wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 192		if (wdev->conn->prev_bssid_valid)
 193			req.prev_bssid = wdev->conn->prev_bssid;
 194		req.ie = params->ie;
 195		req.ie_len = params->ie_len;
 196		req.use_mfp = params->mfp != NL80211_MFP_NO;
 197		req.crypto = params->crypto;
 198		req.flags = params->flags;
 199		req.ht_capa = params->ht_capa;
 200		req.ht_capa_mask = params->ht_capa_mask;
 201		req.vht_capa = params->vht_capa;
 202		req.vht_capa_mask = params->vht_capa_mask;
 203		req.link_id = -1;
 204
 205		req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
 206					   params->bssid,
 207					   params->ssid, params->ssid_len,
 208					   IEEE80211_BSS_TYPE_ESS,
 209					   IEEE80211_PRIVACY_ANY);
 210		if (!req.bss) {
 211			err = -ENOENT;
 212		} else {
 213			err = cfg80211_mlme_assoc(rdev, wdev->netdev,
 214						  &req, NULL);
 215			cfg80211_put_bss(&rdev->wiphy, req.bss);
 216		}
 217
 218		if (err)
 219			cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 220					     NULL, 0,
 221					     WLAN_REASON_DEAUTH_LEAVING,
 222					     false);
 223		return err;
 224	case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
 225		*treason = NL80211_TIMEOUT_ASSOC;
 226		fallthrough;
 227	case CFG80211_CONN_ASSOC_FAILED:
 228		cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 229				     NULL, 0,
 230				     WLAN_REASON_DEAUTH_LEAVING, false);
 231		return -ENOTCONN;
 232	case CFG80211_CONN_DEAUTH:
 233		cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 234				     NULL, 0,
 235				     WLAN_REASON_DEAUTH_LEAVING, false);
 236		fallthrough;
 237	case CFG80211_CONN_ABANDON:
 238		/* free directly, disconnected event already sent */
 239		cfg80211_sme_free(wdev);
 240		return 0;
 241	default:
 242		return 0;
 243	}
 244}
 245
 246void cfg80211_conn_work(struct work_struct *work)
 247{
 248	struct cfg80211_registered_device *rdev =
 249		container_of(work, struct cfg80211_registered_device, conn_work);
 250	struct wireless_dev *wdev;
 251	u8 bssid_buf[ETH_ALEN], *bssid = NULL;
 252	enum nl80211_timeout_reason treason;
 253
 254	guard(wiphy)(&rdev->wiphy);
 255
 256	list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 257		if (!wdev->netdev)
 258			continue;
 259
 260		if (!netif_running(wdev->netdev))
 261			continue;
 262
 263		if (!wdev->conn ||
 264		    wdev->conn->state == CFG80211_CONN_CONNECTED)
 265			continue;
 266
 267		if (wdev->conn->params.bssid) {
 268			memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
 269			bssid = bssid_buf;
 270		}
 271		treason = NL80211_TIMEOUT_UNSPECIFIED;
 272		if (cfg80211_conn_do_work(wdev, &treason)) {
 273			struct cfg80211_connect_resp_params cr;
 274
 275			memset(&cr, 0, sizeof(cr));
 276			cr.status = -1;
 277			cr.links[0].bssid = bssid;
 278			cr.timeout_reason = treason;
 279			__cfg80211_connect_result(wdev->netdev, &cr, false);
 280		}
 281	}
 282}
 283
 284static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
 285				    struct cfg80211_bss *bss)
 286{
 287	memcpy(conn->bssid, bss->bssid, ETH_ALEN);
 288	conn->params.bssid = conn->bssid;
 289	conn->params.channel = bss->channel;
 290	conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 291}
 292
 293/* Returned bss is reference counted and must be cleaned up appropriately. */
 294static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 295{
 296	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 297	struct cfg80211_bss *bss;
 298
 299	lockdep_assert_wiphy(wdev->wiphy);
 300
 301	bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 302			       wdev->conn->params.bssid,
 303			       wdev->conn->params.ssid,
 304			       wdev->conn->params.ssid_len,
 305			       wdev->conn_bss_type,
 306			       IEEE80211_PRIVACY(wdev->conn->params.privacy));
 307	if (!bss)
 308		return NULL;
 309
 310	cfg80211_step_auth_next(wdev->conn, bss);
 311	schedule_work(&rdev->conn_work);
 312
 313	return bss;
 314}
 315
 316void cfg80211_sme_scan_done(struct net_device *dev)
 317{
 318	struct wireless_dev *wdev = dev->ieee80211_ptr;
 319	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 320	struct cfg80211_bss *bss;
 321
 322	lockdep_assert_wiphy(wdev->wiphy);
 323
 324	if (!wdev->conn)
 325		return;
 326
 327	if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 328	    wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 329		return;
 330
 331	bss = cfg80211_get_conn_bss(wdev);
 332	if (bss)
 333		cfg80211_put_bss(&rdev->wiphy, bss);
 334	else
 335		schedule_work(&rdev->conn_work);
 336}
 337
 338void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 339{
 340	struct wiphy *wiphy = wdev->wiphy;
 341	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 342	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 343	u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 344
 345	lockdep_assert_wiphy(wdev->wiphy);
 346
 347	if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 348		return;
 349
 350	if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 351	    wdev->conn->auto_auth &&
 352	    wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 353		/* select automatically between only open, shared, leap */
 354		switch (wdev->conn->params.auth_type) {
 355		case NL80211_AUTHTYPE_OPEN_SYSTEM:
 356			if (wdev->connect_keys)
 357				wdev->conn->params.auth_type =
 358					NL80211_AUTHTYPE_SHARED_KEY;
 359			else
 360				wdev->conn->params.auth_type =
 361					NL80211_AUTHTYPE_NETWORK_EAP;
 362			break;
 363		case NL80211_AUTHTYPE_SHARED_KEY:
 364			wdev->conn->params.auth_type =
 365				NL80211_AUTHTYPE_NETWORK_EAP;
 366			break;
 367		default:
 368			/* huh? */
 369			wdev->conn->params.auth_type =
 370				NL80211_AUTHTYPE_OPEN_SYSTEM;
 371			break;
 372		}
 373		wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 374		schedule_work(&rdev->conn_work);
 375	} else if (status_code != WLAN_STATUS_SUCCESS) {
 376		struct cfg80211_connect_resp_params cr;
 377
 378		memset(&cr, 0, sizeof(cr));
 379		cr.status = status_code;
 380		cr.links[0].bssid = mgmt->bssid;
 381		cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
 382		__cfg80211_connect_result(wdev->netdev, &cr, false);
 383	} else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 384		wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 385		schedule_work(&rdev->conn_work);
 386	}
 387}
 388
 389bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 390{
 391	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 392
 393	if (!wdev->conn)
 394		return false;
 395
 396	if (status == WLAN_STATUS_SUCCESS) {
 397		wdev->conn->state = CFG80211_CONN_CONNECTED;
 398		return false;
 399	}
 400
 401	if (wdev->conn->prev_bssid_valid) {
 402		/*
 403		 * Some stupid APs don't accept reassoc, so we
 404		 * need to fall back to trying regular assoc;
 405		 * return true so no event is sent to userspace.
 406		 */
 407		wdev->conn->prev_bssid_valid = false;
 408		wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 409		schedule_work(&rdev->conn_work);
 410		return true;
 411	}
 412
 413	wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 414	schedule_work(&rdev->conn_work);
 415	return false;
 416}
 417
 418void cfg80211_sme_deauth(struct wireless_dev *wdev)
 419{
 420	cfg80211_sme_free(wdev);
 421}
 422
 423void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 424{
 425	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 426
 427	if (!wdev->conn)
 428		return;
 429
 430	wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
 431	schedule_work(&rdev->conn_work);
 432}
 433
 434void cfg80211_sme_disassoc(struct wireless_dev *wdev)
 435{
 436	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 437
 438	if (!wdev->conn)
 439		return;
 440
 441	wdev->conn->state = CFG80211_CONN_DEAUTH;
 442	schedule_work(&rdev->conn_work);
 443}
 444
 445void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 446{
 447	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 448
 449	if (!wdev->conn)
 450		return;
 451
 452	wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
 453	schedule_work(&rdev->conn_work);
 454}
 455
 456void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
 457{
 458	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 459
 460	if (!wdev->conn)
 461		return;
 462
 463	wdev->conn->state = CFG80211_CONN_ABANDON;
 464	schedule_work(&rdev->conn_work);
 465}
 466
 467static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
 468{
 469	unsigned int link;
 470
 471	for_each_valid_link(wdev, link) {
 472		if (!wdev->links[link].client.current_bss)
 473			continue;
 474		cfg80211_unhold_bss(wdev->links[link].client.current_bss);
 475		cfg80211_put_bss(wdev->wiphy,
 476				 &wdev->links[link].client.current_bss->pub);
 477		wdev->links[link].client.current_bss = NULL;
 478	}
 479}
 480
 481void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask)
 482{
 483	unsigned int link;
 484
 485	for_each_valid_link(wdev, link) {
 486		if (!wdev->links[link].client.current_bss ||
 487		    !(link_mask & BIT(link)))
 488			continue;
 489		cfg80211_unhold_bss(wdev->links[link].client.current_bss);
 490		cfg80211_put_bss(wdev->wiphy,
 491				 &wdev->links[link].client.current_bss->pub);
 492		wdev->links[link].client.current_bss = NULL;
 493	}
 494}
 495
 496static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
 497				     const u8 *ies, size_t ies_len,
 498				     const u8 **out_ies, size_t *out_ies_len)
 499{
 500	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 501	u8 *buf;
 502	size_t offs;
 503
 504	if (!rdev->wiphy.extended_capabilities_len ||
 505	    (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
 506		*out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
 507		if (!*out_ies)
 508			return -ENOMEM;
 509		*out_ies_len = ies_len;
 510		return 0;
 511	}
 512
 513	buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
 514		      GFP_KERNEL);
 515	if (!buf)
 516		return -ENOMEM;
 517
 518	if (ies_len) {
 519		static const u8 before_extcapa[] = {
 520			/* not listing IEs expected to be created by driver */
 521			WLAN_EID_RSN,
 522			WLAN_EID_QOS_CAPA,
 523			WLAN_EID_RRM_ENABLED_CAPABILITIES,
 524			WLAN_EID_MOBILITY_DOMAIN,
 525			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 526			WLAN_EID_BSS_COEX_2040,
 527		};
 528
 529		offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
 530					  ARRAY_SIZE(before_extcapa), 0);
 531		memcpy(buf, ies, offs);
 532		/* leave a whole for extended capabilities IE */
 533		memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
 534		       ies + offs, ies_len - offs);
 535	} else {
 536		offs = 0;
 537	}
 538
 539	/* place extended capabilities IE (with only driver capabilities) */
 540	buf[offs] = WLAN_EID_EXT_CAPABILITY;
 541	buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
 542	memcpy(buf + offs + 2,
 543	       rdev->wiphy.extended_capabilities,
 544	       rdev->wiphy.extended_capabilities_len);
 545
 546	*out_ies = buf;
 547	*out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
 548
 549	return 0;
 550}
 551
 552static int cfg80211_sme_connect(struct wireless_dev *wdev,
 553				struct cfg80211_connect_params *connect,
 554				const u8 *prev_bssid)
 555{
 556	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 557	struct cfg80211_bss *bss;
 558	int err;
 559
 560	if (!rdev->ops->auth || !rdev->ops->assoc)
 561		return -EOPNOTSUPP;
 562
 563	cfg80211_wdev_release_bsses(wdev);
 564
 565	if (wdev->connected) {
 566		cfg80211_sme_free(wdev);
 567		wdev->connected = false;
 568	}
 569
 570	if (wdev->conn)
 571		return -EINPROGRESS;
 572
 573	wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 574	if (!wdev->conn)
 575		return -ENOMEM;
 576
 577	/*
 578	 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 579	 */
 580	memcpy(&wdev->conn->params, connect, sizeof(*connect));
 581	if (connect->bssid) {
 582		wdev->conn->params.bssid = wdev->conn->bssid;
 583		memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 584	}
 585
 586	if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
 587				      &wdev->conn->ie,
 588				      &wdev->conn->params.ie_len)) {
 589		kfree(wdev->conn);
 590		wdev->conn = NULL;
 591		return -ENOMEM;
 592	}
 593	wdev->conn->params.ie = wdev->conn->ie;
 594
 595	if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 596		wdev->conn->auto_auth = true;
 597		/* start with open system ... should mostly work */
 598		wdev->conn->params.auth_type =
 599			NL80211_AUTHTYPE_OPEN_SYSTEM;
 600	} else {
 601		wdev->conn->auto_auth = false;
 602	}
 603
 604	wdev->conn->params.ssid = wdev->u.client.ssid;
 605	wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
 606
 607	/* see if we have the bss already */
 608	bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 609			       wdev->conn->params.bssid,
 610			       wdev->conn->params.ssid,
 611			       wdev->conn->params.ssid_len,
 612			       wdev->conn_bss_type,
 613			       IEEE80211_PRIVACY(wdev->conn->params.privacy));
 614
 615	if (prev_bssid) {
 616		memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 617		wdev->conn->prev_bssid_valid = true;
 618	}
 619
 620	/* we're good if we have a matching bss struct */
 621	if (bss) {
 622		enum nl80211_timeout_reason treason;
 623
 624		cfg80211_step_auth_next(wdev->conn, bss);
 625		err = cfg80211_conn_do_work(wdev, &treason);
 626		cfg80211_put_bss(wdev->wiphy, bss);
 627	} else {
 628		/* otherwise we'll need to scan for the AP first */
 629		err = cfg80211_conn_scan(wdev);
 630
 631		/*
 632		 * If we can't scan right now, then we need to scan again
 633		 * after the current scan finished, since the parameters
 634		 * changed (unless we find a good AP anyway).
 635		 */
 636		if (err == -EBUSY) {
 637			err = 0;
 638			wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 639		}
 640	}
 641
 642	if (err)
 643		cfg80211_sme_free(wdev);
 644
 645	return err;
 646}
 647
 648static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 649{
 650	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 651	int err;
 652
 653	if (!wdev->conn)
 654		return 0;
 655
 656	if (!rdev->ops->deauth)
 657		return -EOPNOTSUPP;
 658
 659	if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 660	    wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 661		err = 0;
 662		goto out;
 663	}
 664
 665	/* wdev->conn->params.bssid must be set if > SCANNING */
 666	err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 667				   wdev->conn->params.bssid,
 668				   NULL, 0, reason, false);
 669 out:
 670	cfg80211_sme_free(wdev);
 671	return err;
 672}
 673
 674/*
 675 * code shared for in-device and software SME
 676 */
 677
 678static bool cfg80211_is_all_idle(void)
 679{
 680	struct cfg80211_registered_device *rdev;
 681	struct wireless_dev *wdev;
 682	bool is_all_idle = true;
 683
 684	/*
 685	 * All devices must be idle as otherwise if you are actively
 686	 * scanning some new beacon hints could be learned and would
 687	 * count as new regulatory hints.
 688	 * Also if there is any other active beaconing interface we
 689	 * need not issue a disconnect hint and reset any info such
 690	 * as chan dfs state, etc.
 691	 */
 692	for_each_rdev(rdev) {
 693		guard(wiphy)(&rdev->wiphy);
 694
 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	}
 701
 702	return is_all_idle;
 703}
 704
 705static void disconnect_work(struct work_struct *work)
 706{
 707	rtnl_lock();
 708	if (cfg80211_is_all_idle())
 709		regulatory_hint_disconnect();
 710	rtnl_unlock();
 711}
 712
 713DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 714
 715static void
 716cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
 717				      struct cfg80211_connect_resp_params *cr)
 718{
 719	unsigned int link;
 720
 721	for_each_valid_link(cr, link) {
 722		if (!cr->links[link].bss)
 723			continue;
 724		cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
 725		cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 726	}
 727}
 728
 729/*
 730 * API calls for drivers implementing connect/disconnect and
 731 * SME event handling
 732 */
 733
 734/* This method must consume bss one way or another */
 735void __cfg80211_connect_result(struct net_device *dev,
 736			       struct cfg80211_connect_resp_params *cr,
 737			       bool wextev)
 738{
 739	struct wireless_dev *wdev = dev->ieee80211_ptr;
 740	const struct element *country_elem = NULL;
 741	const struct element *ssid;
 742	const u8 *country_data;
 743	u8 country_datalen;
 744#ifdef CONFIG_CFG80211_WEXT
 745	union iwreq_data wrqu;
 746#endif
 747	unsigned int link;
 748	const u8 *connected_addr;
 749	bool bss_not_found = false;
 750
 751	lockdep_assert_wiphy(wdev->wiphy);
 752
 753	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 754		    wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 755		goto out;
 756
 757	if (cr->valid_links) {
 758		if (WARN_ON(!cr->ap_mld_addr))
 759			goto out;
 760
 761		for_each_valid_link(cr, link) {
 762			if (WARN_ON(!cr->links[link].addr))
 763				goto out;
 764		}
 765
 766		if (WARN_ON(wdev->connect_keys))
 767			goto out;
 768	}
 769
 770	wdev->unprot_beacon_reported = 0;
 771	nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
 772				    GFP_KERNEL);
 773	connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
 774
 775#ifdef CONFIG_CFG80211_WEXT
 776	if (wextev && !cr->valid_links) {
 777		if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
 778			memset(&wrqu, 0, sizeof(wrqu));
 779			wrqu.data.length = cr->req_ie_len;
 780			wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
 781					    cr->req_ie);
 782		}
 783
 784		if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
 785			memset(&wrqu, 0, sizeof(wrqu));
 786			wrqu.data.length = cr->resp_ie_len;
 787			wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
 788					    cr->resp_ie);
 789		}
 790
 791		memset(&wrqu, 0, sizeof(wrqu));
 792		wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 793		if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
 794			memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
 795			memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
 796			wdev->wext.prev_bssid_valid = true;
 797		}
 798		wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 799	}
 800#endif
 801
 802	if (cr->status == WLAN_STATUS_SUCCESS) {
 803		if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
 804			for_each_valid_link(cr, link) {
 805				if (WARN_ON_ONCE(!cr->links[link].bss))
 806					break;
 807			}
 808		}
 809
 810		for_each_valid_link(cr, link) {
 811			/* don't do extra lookups for failures */
 812			if (cr->links[link].status != WLAN_STATUS_SUCCESS)
 813				continue;
 814
 815			if (cr->links[link].bss)
 816				continue;
 817
 818			cr->links[link].bss =
 819				cfg80211_get_bss(wdev->wiphy, NULL,
 820						 cr->links[link].bssid,
 821						 wdev->u.client.ssid,
 822						 wdev->u.client.ssid_len,
 823						 wdev->conn_bss_type,
 824						 IEEE80211_PRIVACY_ANY);
 825			if (!cr->links[link].bss) {
 826				bss_not_found = true;
 827				break;
 828			}
 829			cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
 830		}
 831	}
 832
 833	cfg80211_wdev_release_bsses(wdev);
 834
 835	if (cr->status != WLAN_STATUS_SUCCESS) {
 836		kfree_sensitive(wdev->connect_keys);
 837		wdev->connect_keys = NULL;
 838		wdev->u.client.ssid_len = 0;
 839		wdev->conn_owner_nlportid = 0;
 840		cfg80211_connect_result_release_bsses(wdev, cr);
 841		cfg80211_sme_free(wdev);
 842		return;
 843	}
 844
 845	if (WARN_ON(bss_not_found)) {
 846		cfg80211_connect_result_release_bsses(wdev, cr);
 847		return;
 848	}
 849
 850	memset(wdev->links, 0, sizeof(wdev->links));
 851	for_each_valid_link(cr, link) {
 852		if (cr->links[link].status == WLAN_STATUS_SUCCESS)
 853			continue;
 854		cr->valid_links &= ~BIT(link);
 855		/* don't require bss pointer for failed links */
 856		if (!cr->links[link].bss)
 857			continue;
 858		cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
 859		cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 860	}
 861	wdev->valid_links = cr->valid_links;
 862	for_each_valid_link(cr, link)
 863		wdev->links[link].client.current_bss =
 864			bss_from_pub(cr->links[link].bss);
 865	wdev->connected = true;
 866	ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
 867	if (cr->valid_links) {
 868		for_each_valid_link(cr, link)
 869			memcpy(wdev->links[link].addr, cr->links[link].addr,
 870			       ETH_ALEN);
 871	}
 872
 873	cfg80211_upload_connect_keys(wdev);
 874
 875	rcu_read_lock();
 876	for_each_valid_link(cr, link) {
 877		country_elem =
 878			ieee80211_bss_get_elem(cr->links[link].bss,
 879					       WLAN_EID_COUNTRY);
 880		if (country_elem)
 881			break;
 882	}
 883	if (!country_elem) {
 884		rcu_read_unlock();
 885		return;
 886	}
 887
 888	country_datalen = country_elem->datalen;
 889	country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
 890	rcu_read_unlock();
 891
 892	if (!country_data)
 893		return;
 894
 895	regulatory_hint_country_ie(wdev->wiphy,
 896				   cr->links[link].bss->channel->band,
 897				   country_data, country_datalen);
 898	kfree(country_data);
 899
 900	if (!wdev->u.client.ssid_len) {
 901		rcu_read_lock();
 902		for_each_valid_link(cr, link) {
 903			u32 ssid_len;
 904
 905			ssid = ieee80211_bss_get_elem(cr->links[link].bss,
 906						      WLAN_EID_SSID);
 907
 908			if (!ssid || !ssid->datalen)
 909				continue;
 910
 911			ssid_len = min(ssid->datalen, IEEE80211_MAX_SSID_LEN);
 912			memcpy(wdev->u.client.ssid, ssid->data, ssid_len);
 913			wdev->u.client.ssid_len = ssid_len;
 914			break;
 915		}
 916		rcu_read_unlock();
 917	}
 918
 919	return;
 920out:
 921	for_each_valid_link(cr, link)
 922		cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 923}
 924
 925static void cfg80211_update_link_bss(struct wireless_dev *wdev,
 926				     struct cfg80211_bss **bss)
 927{
 928	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 929	struct cfg80211_internal_bss *ibss;
 930
 931	if (!*bss)
 932		return;
 933
 934	ibss = bss_from_pub(*bss);
 935	if (list_empty(&ibss->list)) {
 936		struct cfg80211_bss *found = NULL, *tmp = *bss;
 937
 938		found = cfg80211_get_bss(wdev->wiphy, NULL,
 939					 (*bss)->bssid,
 940					 wdev->u.client.ssid,
 941					 wdev->u.client.ssid_len,
 942					 wdev->conn_bss_type,
 943					 IEEE80211_PRIVACY_ANY);
 944		if (found) {
 945			/* The same BSS is already updated so use it
 946			 * instead, as it has latest info.
 947			 */
 948			*bss = found;
 949		} else {
 950			/* Update with BSS provided by driver, it will
 951			 * be freshly added and ref cnted, we can free
 952			 * the old one.
 953			 *
 954			 * signal_valid can be false, as we are not
 955			 * expecting the BSS to be found.
 956			 *
 957			 * keep the old timestamp to avoid confusion
 958			 */
 959			cfg80211_bss_update(rdev, ibss, false,
 960					    ibss->ts);
 961		}
 962
 963		cfg80211_put_bss(wdev->wiphy, tmp);
 964	}
 965}
 966
 967/* Consumes bss object(s) one way or another */
 968void cfg80211_connect_done(struct net_device *dev,
 969			   struct cfg80211_connect_resp_params *params,
 970			   gfp_t gfp)
 971{
 972	struct wireless_dev *wdev = dev->ieee80211_ptr;
 973	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 974	struct cfg80211_event *ev;
 975	unsigned long flags;
 976	u8 *next;
 977	size_t link_info_size = 0;
 978	unsigned int link;
 979
 980	for_each_valid_link(params, link) {
 981		cfg80211_update_link_bss(wdev, &params->links[link].bss);
 982		link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
 983		link_info_size += params->links[link].addr ? ETH_ALEN : 0;
 984	}
 985
 986	ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
 987		     params->req_ie_len + params->resp_ie_len +
 988		     params->fils.kek_len + params->fils.pmk_len +
 989		     (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
 990		     gfp);
 991
 992	if (!ev) {
 993		for_each_valid_link(params, link)
 994			cfg80211_put_bss(wdev->wiphy,
 995					 params->links[link].bss);
 996		return;
 997	}
 998
 999	ev->type = EVENT_CONNECT_RESULT;
1000	next = ((u8 *)ev) + sizeof(*ev);
1001	if (params->ap_mld_addr) {
1002		ev->cr.ap_mld_addr = next;
1003		memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
1004		       ETH_ALEN);
1005		next += ETH_ALEN;
1006	}
1007	if (params->req_ie_len) {
1008		ev->cr.req_ie = next;
1009		ev->cr.req_ie_len = params->req_ie_len;
1010		memcpy((void *)ev->cr.req_ie, params->req_ie,
1011		       params->req_ie_len);
1012		next += params->req_ie_len;
1013	}
1014	if (params->resp_ie_len) {
1015		ev->cr.resp_ie = next;
1016		ev->cr.resp_ie_len = params->resp_ie_len;
1017		memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1018		       params->resp_ie_len);
1019		next += params->resp_ie_len;
1020	}
1021	if (params->fils.kek_len) {
1022		ev->cr.fils.kek = next;
1023		ev->cr.fils.kek_len = params->fils.kek_len;
1024		memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1025		       params->fils.kek_len);
1026		next += params->fils.kek_len;
1027	}
1028	if (params->fils.pmk_len) {
1029		ev->cr.fils.pmk = next;
1030		ev->cr.fils.pmk_len = params->fils.pmk_len;
1031		memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1032		       params->fils.pmk_len);
1033		next += params->fils.pmk_len;
1034	}
1035	if (params->fils.pmkid) {
1036		ev->cr.fils.pmkid = next;
1037		memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1038		       WLAN_PMKID_LEN);
1039		next += WLAN_PMKID_LEN;
1040	}
1041	ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1042	if (params->fils.update_erp_next_seq_num)
1043		ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1044	ev->cr.valid_links = params->valid_links;
1045	for_each_valid_link(params, link) {
1046		if (params->links[link].bss)
1047			cfg80211_hold_bss(
1048				bss_from_pub(params->links[link].bss));
1049		ev->cr.links[link].bss = params->links[link].bss;
1050		ev->cr.links[link].status = params->links[link].status;
1051
1052		if (params->links[link].addr) {
1053			ev->cr.links[link].addr = next;
1054			memcpy((void *)ev->cr.links[link].addr,
1055			       params->links[link].addr,
1056			       ETH_ALEN);
1057			next += ETH_ALEN;
1058		}
1059		if (params->links[link].bssid) {
1060			ev->cr.links[link].bssid = next;
1061			memcpy((void *)ev->cr.links[link].bssid,
1062			       params->links[link].bssid,
1063			       ETH_ALEN);
1064			next += ETH_ALEN;
1065		}
1066	}
1067	ev->cr.status = params->status;
1068	ev->cr.timeout_reason = params->timeout_reason;
1069
1070	spin_lock_irqsave(&wdev->event_lock, flags);
1071	list_add_tail(&ev->list, &wdev->event_list);
1072	spin_unlock_irqrestore(&wdev->event_lock, flags);
1073	queue_work(cfg80211_wq, &rdev->event_work);
1074}
1075EXPORT_SYMBOL(cfg80211_connect_done);
1076
1077/* Consumes bss object one way or another */
1078void __cfg80211_roamed(struct wireless_dev *wdev,
1079		       struct cfg80211_roam_info *info)
1080{
1081#ifdef CONFIG_CFG80211_WEXT
1082	union iwreq_data wrqu;
1083#endif
1084	unsigned int link;
1085	const u8 *connected_addr;
1086
1087	lockdep_assert_wiphy(wdev->wiphy);
1088
1089	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1090		    wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1091		goto out;
1092
1093	if (WARN_ON(!wdev->connected))
1094		goto out;
1095
1096	if (info->valid_links) {
1097		if (WARN_ON(!info->ap_mld_addr))
1098			goto out;
1099
1100		for_each_valid_link(info, link) {
1101			if (WARN_ON(!info->links[link].addr))
1102				goto out;
1103		}
1104	}
1105
1106	cfg80211_wdev_release_bsses(wdev);
1107
1108	for_each_valid_link(info, link) {
1109		if (WARN_ON(!info->links[link].bss))
1110			goto out;
1111	}
1112
1113	memset(wdev->links, 0, sizeof(wdev->links));
1114	wdev->valid_links = info->valid_links;
1115	for_each_valid_link(info, link) {
1116		cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1117		wdev->links[link].client.current_bss =
1118			bss_from_pub(info->links[link].bss);
1119	}
1120
1121	connected_addr = info->valid_links ?
1122			 info->ap_mld_addr :
1123			 info->links[0].bss->bssid;
1124	ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1125	if (info->valid_links) {
1126		for_each_valid_link(info, link)
1127			memcpy(wdev->links[link].addr, info->links[link].addr,
1128			       ETH_ALEN);
1129	}
1130	wdev->unprot_beacon_reported = 0;
1131	nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1132			    wdev->netdev, info, GFP_KERNEL);
1133
1134#ifdef CONFIG_CFG80211_WEXT
1135	if (!info->valid_links) {
1136		if (info->req_ie) {
1137			memset(&wrqu, 0, sizeof(wrqu));
1138			wrqu.data.length = info->req_ie_len;
1139			wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1140					    &wrqu, info->req_ie);
1141		}
1142
1143		if (info->resp_ie) {
1144			memset(&wrqu, 0, sizeof(wrqu));
1145			wrqu.data.length = info->resp_ie_len;
1146			wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1147					    &wrqu, info->resp_ie);
1148		}
1149
1150		memset(&wrqu, 0, sizeof(wrqu));
1151		wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1152		memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1153		memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1154		wdev->wext.prev_bssid_valid = true;
1155		wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1156	}
1157#endif
1158
1159	return;
1160out:
1161	for_each_valid_link(info, link)
1162		cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1163}
1164
1165/* Consumes info->links.bss object(s) one way or another */
1166void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1167		     gfp_t gfp)
1168{
1169	struct wireless_dev *wdev = dev->ieee80211_ptr;
1170	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1171	struct cfg80211_event *ev;
1172	unsigned long flags;
1173	u8 *next;
1174	unsigned int link;
1175	size_t link_info_size = 0;
1176	bool bss_not_found = false;
1177
1178	for_each_valid_link(info, link) {
1179		link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1180		link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1181
1182		if (info->links[link].bss)
1183			continue;
1184
1185		info->links[link].bss =
1186			cfg80211_get_bss(wdev->wiphy,
1187					 info->links[link].channel,
1188					 info->links[link].bssid,
1189					 wdev->u.client.ssid,
1190					 wdev->u.client.ssid_len,
1191					 wdev->conn_bss_type,
1192					 IEEE80211_PRIVACY_ANY);
1193
1194		if (!info->links[link].bss) {
1195			bss_not_found = true;
1196			break;
1197		}
1198	}
1199
1200	if (WARN_ON(bss_not_found))
1201		goto out;
1202
1203	ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1204		     info->fils.kek_len + info->fils.pmk_len +
1205		     (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1206		     (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1207	if (!ev)
1208		goto out;
1209
1210	ev->type = EVENT_ROAMED;
1211	next = ((u8 *)ev) + sizeof(*ev);
1212	if (info->req_ie_len) {
1213		ev->rm.req_ie = next;
1214		ev->rm.req_ie_len = info->req_ie_len;
1215		memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1216		next += info->req_ie_len;
1217	}
1218	if (info->resp_ie_len) {
1219		ev->rm.resp_ie = next;
1220		ev->rm.resp_ie_len = info->resp_ie_len;
1221		memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1222		       info->resp_ie_len);
1223		next += info->resp_ie_len;
1224	}
1225	if (info->fils.kek_len) {
1226		ev->rm.fils.kek = next;
1227		ev->rm.fils.kek_len = info->fils.kek_len;
1228		memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1229		       info->fils.kek_len);
1230		next += info->fils.kek_len;
1231	}
1232	if (info->fils.pmk_len) {
1233		ev->rm.fils.pmk = next;
1234		ev->rm.fils.pmk_len = info->fils.pmk_len;
1235		memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1236		       info->fils.pmk_len);
1237		next += info->fils.pmk_len;
1238	}
1239	if (info->fils.pmkid) {
1240		ev->rm.fils.pmkid = next;
1241		memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1242		       WLAN_PMKID_LEN);
1243		next += WLAN_PMKID_LEN;
1244	}
1245	ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1246	if (info->fils.update_erp_next_seq_num)
1247		ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1248	if (info->ap_mld_addr) {
1249		ev->rm.ap_mld_addr = next;
1250		memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1251		       ETH_ALEN);
1252		next += ETH_ALEN;
1253	}
1254	ev->rm.valid_links = info->valid_links;
1255	for_each_valid_link(info, link) {
1256		ev->rm.links[link].bss = info->links[link].bss;
1257
1258		if (info->links[link].addr) {
1259			ev->rm.links[link].addr = next;
1260			memcpy((void *)ev->rm.links[link].addr,
1261			       info->links[link].addr,
1262			       ETH_ALEN);
1263			next += ETH_ALEN;
1264		}
1265
1266		if (info->links[link].bssid) {
1267			ev->rm.links[link].bssid = next;
1268			memcpy((void *)ev->rm.links[link].bssid,
1269			       info->links[link].bssid,
1270			       ETH_ALEN);
1271			next += ETH_ALEN;
1272		}
1273	}
1274
1275	spin_lock_irqsave(&wdev->event_lock, flags);
1276	list_add_tail(&ev->list, &wdev->event_list);
1277	spin_unlock_irqrestore(&wdev->event_lock, flags);
1278	queue_work(cfg80211_wq, &rdev->event_work);
1279
1280	return;
1281out:
1282	for_each_valid_link(info, link)
1283		cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1284
1285}
1286EXPORT_SYMBOL(cfg80211_roamed);
1287
1288void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr,
1289					const u8 *td_bitmap, u8 td_bitmap_len)
1290{
1291	lockdep_assert_wiphy(wdev->wiphy);
1292
1293	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1294		wdev->iftype != NL80211_IFTYPE_P2P_CLIENT &&
1295		wdev->iftype != NL80211_IFTYPE_AP &&
1296		wdev->iftype != NL80211_IFTYPE_P2P_GO))
1297		return;
1298
1299	if (wdev->iftype == NL80211_IFTYPE_STATION ||
1300		wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1301		if (WARN_ON(!wdev->connected) ||
1302			WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, peer_addr)))
1303			return;
1304	}
1305
1306	nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1307				     peer_addr, td_bitmap, td_bitmap_len);
1308}
1309
1310void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr,
1311			      const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1312{
1313	struct wireless_dev *wdev = dev->ieee80211_ptr;
1314	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1315	struct cfg80211_event *ev;
1316	unsigned long flags;
1317
1318	if (WARN_ON(!peer_addr))
1319		return;
1320
1321	ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1322	if (!ev)
1323		return;
1324
1325	ev->type = EVENT_PORT_AUTHORIZED;
1326	memcpy(ev->pa.peer_addr, peer_addr, ETH_ALEN);
1327	ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1328	ev->pa.td_bitmap_len = td_bitmap_len;
1329	memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1330
1331	/*
1332	 * Use the wdev event list so that if there are pending
1333	 * connected/roamed events, they will be reported first.
1334	 */
1335	spin_lock_irqsave(&wdev->event_lock, flags);
1336	list_add_tail(&ev->list, &wdev->event_list);
1337	spin_unlock_irqrestore(&wdev->event_lock, flags);
1338	queue_work(cfg80211_wq, &rdev->event_work);
1339}
1340EXPORT_SYMBOL(cfg80211_port_authorized);
1341
1342void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1343			     size_t ie_len, u16 reason, bool from_ap)
1344{
1345	struct wireless_dev *wdev = dev->ieee80211_ptr;
1346	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1347	int i;
1348#ifdef CONFIG_CFG80211_WEXT
1349	union iwreq_data wrqu;
1350#endif
1351
1352	lockdep_assert_wiphy(wdev->wiphy);
1353
1354	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1355		    wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1356		return;
1357
1358	cfg80211_wdev_release_bsses(wdev);
1359	wdev->valid_links = 0;
1360	wdev->connected = false;
1361	wdev->u.client.ssid_len = 0;
1362	wdev->conn_owner_nlportid = 0;
1363	kfree_sensitive(wdev->connect_keys);
1364	wdev->connect_keys = NULL;
1365
1366	nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1367
1368	/* stop critical protocol if supported */
1369	if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1370		rdev->crit_proto_nlportid = 0;
1371		rdev_crit_proto_stop(rdev, wdev);
1372	}
1373
1374	/*
1375	 * Delete all the keys ... pairwise keys can't really
1376	 * exist any more anyway, but default keys might.
1377	 */
1378	if (rdev->ops->del_key) {
1379		int max_key_idx = 5;
1380
1381		if (wiphy_ext_feature_isset(
1382			    wdev->wiphy,
1383			    NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1384		    wiphy_ext_feature_isset(
1385			    wdev->wiphy,
1386			    NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1387			max_key_idx = 7;
1388		for (i = 0; i <= max_key_idx; i++)
1389			rdev_del_key(rdev, dev, -1, i, false, NULL);
1390	}
1391
1392	rdev_set_qos_map(rdev, dev, NULL);
1393
1394#ifdef CONFIG_CFG80211_WEXT
1395	memset(&wrqu, 0, sizeof(wrqu));
1396	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1397	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1398	wdev->wext.connect.ssid_len = 0;
1399#endif
1400
1401	schedule_work(&cfg80211_disconnect_work);
1402
1403	cfg80211_schedule_channels_check(wdev);
1404}
1405
1406void cfg80211_disconnected(struct net_device *dev, u16 reason,
1407			   const u8 *ie, size_t ie_len,
1408			   bool locally_generated, gfp_t gfp)
1409{
1410	struct wireless_dev *wdev = dev->ieee80211_ptr;
1411	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1412	struct cfg80211_event *ev;
1413	unsigned long flags;
1414
1415	ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1416	if (!ev)
1417		return;
1418
1419	ev->type = EVENT_DISCONNECTED;
1420	ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1421	ev->dc.ie_len = ie_len;
1422	memcpy((void *)ev->dc.ie, ie, ie_len);
1423	ev->dc.reason = reason;
1424	ev->dc.locally_generated = locally_generated;
1425
1426	spin_lock_irqsave(&wdev->event_lock, flags);
1427	list_add_tail(&ev->list, &wdev->event_list);
1428	spin_unlock_irqrestore(&wdev->event_lock, flags);
1429	queue_work(cfg80211_wq, &rdev->event_work);
1430}
1431EXPORT_SYMBOL(cfg80211_disconnected);
1432
1433/*
1434 * API calls for nl80211/wext compatibility code
1435 */
1436int cfg80211_connect(struct cfg80211_registered_device *rdev,
1437		     struct net_device *dev,
1438		     struct cfg80211_connect_params *connect,
1439		     struct cfg80211_cached_keys *connkeys,
1440		     const u8 *prev_bssid)
1441{
1442	struct wireless_dev *wdev = dev->ieee80211_ptr;
1443	int err;
1444
1445	lockdep_assert_wiphy(wdev->wiphy);
1446
1447	/*
1448	 * If we have an ssid_len, we're trying to connect or are
1449	 * already connected, so reject a new SSID unless it's the
1450	 * same (which is the case for re-association.)
1451	 */
1452	if (wdev->u.client.ssid_len &&
1453	    (wdev->u.client.ssid_len != connect->ssid_len ||
1454	     memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1455		return -EALREADY;
1456
1457	/*
1458	 * If connected, reject (re-)association unless prev_bssid
1459	 * matches the current BSSID.
1460	 */
1461	if (wdev->connected) {
1462		if (!prev_bssid)
1463			return -EALREADY;
1464		if (!ether_addr_equal(prev_bssid,
1465				      wdev->u.client.connected_addr))
1466			return -ENOTCONN;
1467	}
1468
1469	/*
1470	 * Reject if we're in the process of connecting with WEP,
1471	 * this case isn't very interesting and trying to handle
1472	 * it would make the code much more complex.
1473	 */
1474	if (wdev->connect_keys)
1475		return -EINPROGRESS;
1476
1477	cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1478				  rdev->wiphy.ht_capa_mod_mask);
1479	cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1480				   rdev->wiphy.vht_capa_mod_mask);
1481
1482	if (connkeys && connkeys->def >= 0) {
1483		int idx;
1484		u32 cipher;
1485
1486		idx = connkeys->def;
1487		cipher = connkeys->params[idx].cipher;
1488		/* If given a WEP key we may need it for shared key auth */
1489		if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1490		    cipher == WLAN_CIPHER_SUITE_WEP104) {
1491			connect->key_idx = idx;
1492			connect->key = connkeys->params[idx].key;
1493			connect->key_len = connkeys->params[idx].key_len;
1494
1495			/*
1496			 * If ciphers are not set (e.g. when going through
1497			 * iwconfig), we have to set them appropriately here.
1498			 */
1499			if (connect->crypto.cipher_group == 0)
1500				connect->crypto.cipher_group = cipher;
1501
1502			if (connect->crypto.n_ciphers_pairwise == 0) {
1503				connect->crypto.n_ciphers_pairwise = 1;
1504				connect->crypto.ciphers_pairwise[0] = cipher;
1505			}
1506		}
1507	} else {
1508		if (WARN_ON(connkeys))
1509			return -EINVAL;
1510
1511		/* connect can point to wdev->wext.connect which
1512		 * can hold key data from a previous connection
1513		 */
1514		connect->key = NULL;
1515		connect->key_len = 0;
1516		connect->key_idx = 0;
1517	}
1518
1519	wdev->connect_keys = connkeys;
1520	memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1521	wdev->u.client.ssid_len = connect->ssid_len;
1522
1523	wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1524					      IEEE80211_BSS_TYPE_ESS;
1525
1526	if (!rdev->ops->connect)
1527		err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1528	else
1529		err = rdev_connect(rdev, dev, connect);
1530
1531	if (err) {
1532		wdev->connect_keys = NULL;
1533		/*
1534		 * This could be reassoc getting refused, don't clear
1535		 * ssid_len in that case.
1536		 */
1537		if (!wdev->connected)
1538			wdev->u.client.ssid_len = 0;
1539		return err;
1540	}
1541
1542	return 0;
1543}
1544
1545int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1546			struct net_device *dev, u16 reason, bool wextev)
1547{
1548	struct wireless_dev *wdev = dev->ieee80211_ptr;
1549	int err = 0;
1550
1551	lockdep_assert_wiphy(wdev->wiphy);
1552
1553	kfree_sensitive(wdev->connect_keys);
1554	wdev->connect_keys = NULL;
1555
1556	wdev->conn_owner_nlportid = 0;
1557
1558	if (wdev->conn)
1559		err = cfg80211_sme_disconnect(wdev, reason);
1560	else if (!rdev->ops->disconnect)
1561		cfg80211_mlme_down(rdev, dev);
1562	else if (wdev->u.client.ssid_len)
1563		err = rdev_disconnect(rdev, dev, reason);
1564
1565	/*
1566	 * Clear ssid_len unless we actually were fully connected,
1567	 * in which case cfg80211_disconnected() will take care of
1568	 * this later.
1569	 */
1570	if (!wdev->connected)
1571		wdev->u.client.ssid_len = 0;
1572
1573	return err;
1574}
1575
1576/*
1577 * Used to clean up after the connection / connection attempt owner socket
1578 * disconnects
1579 */
1580void cfg80211_autodisconnect_wk(struct work_struct *work)
1581{
1582	struct wireless_dev *wdev =
1583		container_of(work, struct wireless_dev, disconnect_wk);
1584	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1585
1586	guard(wiphy)(wdev->wiphy);
1587
1588	if (wdev->conn_owner_nlportid) {
1589		switch (wdev->iftype) {
1590		case NL80211_IFTYPE_ADHOC:
1591			cfg80211_leave_ibss(rdev, wdev->netdev, false);
1592			break;
1593		case NL80211_IFTYPE_AP:
1594		case NL80211_IFTYPE_P2P_GO:
1595			cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1596			break;
1597		case NL80211_IFTYPE_MESH_POINT:
1598			cfg80211_leave_mesh(rdev, wdev->netdev);
1599			break;
1600		case NL80211_IFTYPE_STATION:
1601		case NL80211_IFTYPE_P2P_CLIENT:
1602			/*
1603			 * Use disconnect_bssid if still connecting and
1604			 * ops->disconnect not implemented.  Otherwise we can
1605			 * use cfg80211_disconnect.
1606			 */
1607			if (rdev->ops->disconnect || wdev->connected)
1608				cfg80211_disconnect(rdev, wdev->netdev,
1609						    WLAN_REASON_DEAUTH_LEAVING,
1610						    true);
1611			else
1612				cfg80211_mlme_deauth(rdev, wdev->netdev,
1613						     wdev->disconnect_bssid,
1614						     NULL, 0,
1615						     WLAN_REASON_DEAUTH_LEAVING,
1616						     false);
1617			break;
1618		default:
1619			break;
1620		}
1621	}
1622}