[mirror_ubuntu-bionic-kernel.git] / net / wireless / sme.c

/*
 * SME code for cfg80211's connect emulation.
 *
 * Copyright 2009	Johannes Berg <johannes@sipsolutions.net>
 * Copyright (C) 2009   Intel Corporation. All rights reserved.
 */

#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/workqueue.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>
#include "nl80211.h"

struct cfg80211_conn {
	struct cfg80211_connect_params params;
	/* these are sub-states of the _CONNECTING sme_state */
	enum {
		CFG80211_CONN_IDLE,
		CFG80211_CONN_SCANNING,
		CFG80211_CONN_SCAN_AGAIN,
		CFG80211_CONN_AUTHENTICATE_NEXT,
		CFG80211_CONN_AUTHENTICATING,
		CFG80211_CONN_ASSOCIATE_NEXT,
		CFG80211_CONN_ASSOCIATING,
	} state;
	u8 bssid[ETH_ALEN];
	u8 *ie;
	size_t ie_len;
	bool auto_auth;
};


static int cfg80211_conn_scan(struct wireless_dev *wdev)
{
	struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
	struct cfg80211_scan_request *request;
	int n_channels, err;

	ASSERT_RTNL();

	if (drv->scan_req)
		return -EBUSY;

	if (wdev->conn->params.channel) {
		n_channels = 1;
	} else {
		enum ieee80211_band band;
		n_channels = 0;

		for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
			if (!wdev->wiphy->bands[band])
				continue;
			n_channels += wdev->wiphy->bands[band]->n_channels;
		}
	}
	request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
			  sizeof(request->channels[0]) * n_channels,
			  GFP_KERNEL);
	if (!request)
		return -ENOMEM;

	request->channels = (void *)((char *)request + sizeof(*request));
	if (wdev->conn->params.channel)
		request->channels[0] = wdev->conn->params.channel;
	else {
		int i = 0, j;
		enum ieee80211_band band;

		for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
			if (!wdev->wiphy->bands[band])
				continue;
			for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
			     i++, j++)
				request->channels[i] =
					&wdev->wiphy->bands[band]->channels[j];
		}
	}
	request->n_channels = n_channels;
	request->ssids = (void *)(request->channels + n_channels);
	request->n_ssids = 1;

	memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
		wdev->conn->params.ssid_len);
	request->ssids[0].ssid_len = wdev->conn->params.ssid_len;

	request->ifidx = wdev->netdev->ifindex;
	request->wiphy = &drv->wiphy;

	drv->scan_req = request;

	err = drv->ops->scan(wdev->wiphy, wdev->netdev, request);
	if (!err) {
		wdev->conn->state = CFG80211_CONN_SCANNING;
		nl80211_send_scan_start(drv, wdev->netdev);
	} else {
		drv->scan_req = NULL;
		kfree(request);
	}
	return err;
}

static int cfg80211_conn_do_work(struct wireless_dev *wdev)
{
	struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
	struct cfg80211_connect_params *params;
	int err;

	if (!wdev->conn)
		return 0;

	params = &wdev->conn->params;

	switch (wdev->conn->state) {
	case CFG80211_CONN_SCAN_AGAIN:
		return cfg80211_conn_scan(wdev);
	case CFG80211_CONN_AUTHENTICATE_NEXT:
		BUG_ON(!drv->ops->auth);
		wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
		return cfg80211_mlme_auth(drv, wdev->netdev,
					  params->channel, params->auth_type,
					  params->bssid,
					  params->ssid, params->ssid_len,
					  NULL, 0);
	case CFG80211_CONN_ASSOCIATE_NEXT:
		BUG_ON(!drv->ops->assoc);
		wdev->conn->state = CFG80211_CONN_ASSOCIATING;
		/*
		 * We could, later, implement roaming here and then actually
		 * set prev_bssid to non-NULL. But then we need to be aware
		 * that some APs don't like that -- so we'd need to retry
		 * the association.
		 */
		err = cfg80211_mlme_assoc(drv, wdev->netdev,
					  params->channel, params->bssid, NULL,
					  params->ssid, params->ssid_len,
					  params->ie, params->ie_len,
					  false, &params->crypto);
		if (err)
			cfg80211_mlme_deauth(drv, wdev->netdev, params->bssid,
					     NULL, 0, WLAN_REASON_DEAUTH_LEAVING);
		return err;
	default:
		return 0;
	}
}

void cfg80211_conn_work(struct work_struct *work)
{
	struct cfg80211_registered_device *drv =
		container_of(work, struct cfg80211_registered_device, conn_work);
	struct wireless_dev *wdev;

	rtnl_lock();
	mutex_lock(&drv->devlist_mtx);

	list_for_each_entry(wdev, &drv->netdev_list, list) {
		if (!netif_running(wdev->netdev))
			continue;
		if (wdev->sme_state != CFG80211_SME_CONNECTING)
			continue;
		if (cfg80211_conn_do_work(wdev))
			cfg80211_connect_result(wdev->netdev,
						wdev->conn->params.bssid,
						NULL, 0, NULL, 0,
						WLAN_STATUS_UNSPECIFIED_FAILURE,
						GFP_ATOMIC);
	}

	mutex_unlock(&drv->devlist_mtx);
	rtnl_unlock();
}

static bool cfg80211_get_conn_bss(struct wireless_dev *wdev)
{
	struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
	struct cfg80211_bss *bss;
	u16 capa = WLAN_CAPABILITY_ESS;

	if (wdev->conn->params.privacy)
		capa |= WLAN_CAPABILITY_PRIVACY;

	bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid,
			       wdev->conn->params.ssid,
			       wdev->conn->params.ssid_len,
			       WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
			       capa);
	if (!bss)
		return false;

	memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
	wdev->conn->params.bssid = wdev->conn->bssid;
	wdev->conn->params.channel = bss->channel;
	wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
	schedule_work(&drv->conn_work);

	cfg80211_put_bss(bss);
	return true;
}

void cfg80211_sme_scan_done(struct net_device *dev)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);

	if (wdev->sme_state != CFG80211_SME_CONNECTING)
		return;

	if (WARN_ON(!wdev->conn))
		return;

	if (wdev->conn->state != CFG80211_CONN_SCANNING &&
	    wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
		return;

	if (!cfg80211_get_conn_bss(wdev)) {
		/* not found */
		if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
			schedule_work(&drv->conn_work);
		else
			cfg80211_connect_result(dev, wdev->conn->params.bssid,
						NULL, 0, NULL, 0,
						WLAN_STATUS_UNSPECIFIED_FAILURE,
						GFP_ATOMIC);
		return;
	}
}

void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct wiphy *wiphy = wdev->wiphy;
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
	u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);

	/* should only RX auth frames when connecting */
	if (wdev->sme_state != CFG80211_SME_CONNECTING)
		return;

	if (WARN_ON(!wdev->conn))
		return;

	if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
	    wdev->conn->auto_auth &&
	    wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
		/* select automatically between only open, shared, leap */
		switch (wdev->conn->params.auth_type) {
		case NL80211_AUTHTYPE_OPEN_SYSTEM:
			wdev->conn->params.auth_type =
				NL80211_AUTHTYPE_SHARED_KEY;
			break;
		case NL80211_AUTHTYPE_SHARED_KEY:
			wdev->conn->params.auth_type =
				NL80211_AUTHTYPE_NETWORK_EAP;
			break;
		default:
			/* huh? */
			wdev->conn->params.auth_type =
				NL80211_AUTHTYPE_OPEN_SYSTEM;
			break;
		}
		wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
		schedule_work(&rdev->conn_work);
	} else if (status_code != WLAN_STATUS_SUCCESS) {
		wdev->sme_state = CFG80211_SME_IDLE;
		kfree(wdev->conn);
		wdev->conn = NULL;
	} else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
		 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
		wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
		schedule_work(&rdev->conn_work);
	}
}

static void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
				      const u8 *req_ie, size_t req_ie_len,
				      const u8 *resp_ie, size_t resp_ie_len,
				      u16 status, bool wextev, gfp_t gfp)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_bss *bss;
#ifdef CONFIG_WIRELESS_EXT
	union iwreq_data wrqu;
#endif

	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
		return;

	if (wdev->sme_state == CFG80211_SME_CONNECTED)
		nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), dev,
				    bssid, req_ie, req_ie_len,
				    resp_ie, resp_ie_len, gfp);
	else
		nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
					    bssid, req_ie, req_ie_len,
					    resp_ie, resp_ie_len,
					    status, gfp);

#ifdef CONFIG_WIRELESS_EXT
	if (wextev) {
		if (req_ie && status == WLAN_STATUS_SUCCESS) {
			memset(&wrqu, 0, sizeof(wrqu));
			wrqu.data.length = req_ie_len;
			wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, req_ie);
		}

		if (resp_ie && status == WLAN_STATUS_SUCCESS) {
			memset(&wrqu, 0, sizeof(wrqu));
			wrqu.data.length = resp_ie_len;
			wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
		}

		memset(&wrqu, 0, sizeof(wrqu));
		wrqu.ap_addr.sa_family = ARPHRD_ETHER;
		if (bssid && status == WLAN_STATUS_SUCCESS)
			memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
		wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	}
#endif

	if (status == WLAN_STATUS_SUCCESS &&
	    wdev->sme_state == CFG80211_SME_IDLE) {
		wdev->sme_state = CFG80211_SME_CONNECTED;
		return;
	}

	if (wdev->sme_state != CFG80211_SME_CONNECTING)
		return;

	if (wdev->current_bss) {
		cfg80211_unhold_bss(wdev->current_bss);
		cfg80211_put_bss(&wdev->current_bss->pub);
		wdev->current_bss = NULL;
	}

	if (wdev->conn)
		wdev->conn->state = CFG80211_CONN_IDLE;

	if (status == WLAN_STATUS_SUCCESS) {
		bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
				       wdev->ssid, wdev->ssid_len,
				       WLAN_CAPABILITY_ESS,
				       WLAN_CAPABILITY_ESS);

		if (WARN_ON(!bss))
			return;

		cfg80211_hold_bss(bss_from_pub(bss));
		wdev->current_bss = bss_from_pub(bss);

		wdev->sme_state = CFG80211_SME_CONNECTED;
	} else {
		wdev->sme_state = CFG80211_SME_IDLE;
		kfree(wdev->conn);
		wdev->conn = NULL;
	}
}

void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
			     const u8 *req_ie, size_t req_ie_len,
			     const u8 *resp_ie, size_t resp_ie_len,
			     u16 status, gfp_t gfp)
{
	bool wextev = status == WLAN_STATUS_SUCCESS;
	__cfg80211_connect_result(dev, bssid, req_ie, req_ie_len, resp_ie, resp_ie_len, status, wextev, gfp);
}
EXPORT_SYMBOL(cfg80211_connect_result);

void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
		     const u8 *req_ie, size_t req_ie_len,
		     const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_bss *bss;
#ifdef CONFIG_WIRELESS_EXT
	union iwreq_data wrqu;
#endif

	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
		return;

	if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
		return;

	/* internal error -- how did we get to CONNECTED w/o BSS? */
	if (WARN_ON(!wdev->current_bss)) {
		return;
	}

	cfg80211_unhold_bss(wdev->current_bss);
	cfg80211_put_bss(&wdev->current_bss->pub);
	wdev->current_bss = NULL;

	bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
			       wdev->ssid, wdev->ssid_len,
			       WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);

	if (WARN_ON(!bss))
		return;

	cfg80211_hold_bss(bss_from_pub(bss));
	wdev->current_bss = bss_from_pub(bss);

	nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), dev, bssid,
			    req_ie, req_ie_len, resp_ie, resp_ie_len, gfp);

#ifdef CONFIG_WIRELESS_EXT
	if (req_ie) {
		memset(&wrqu, 0, sizeof(wrqu));
		wrqu.data.length = req_ie_len;
		wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, req_ie);
	}

	if (resp_ie) {
		memset(&wrqu, 0, sizeof(wrqu));
		wrqu.data.length = resp_ie_len;
		wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
	}

	memset(&wrqu, 0, sizeof(wrqu));
	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
#endif
}
EXPORT_SYMBOL(cfg80211_roamed);

void __cfg80211_disconnected(struct net_device *dev, gfp_t gfp, u8 *ie,
			     size_t ie_len, u16 reason, bool from_ap)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
#ifdef CONFIG_WIRELESS_EXT
	union iwreq_data wrqu;
#endif

	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
		return;

	if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
		return;

	if (wdev->current_bss) {
		cfg80211_unhold_bss(wdev->current_bss);
		cfg80211_put_bss(&wdev->current_bss->pub);
	}

	wdev->current_bss = NULL;
	wdev->sme_state = CFG80211_SME_IDLE;

	if (wdev->conn) {
		kfree(wdev->conn->ie);
		wdev->conn->ie = NULL;
		kfree(wdev->conn);
		wdev->conn = NULL;
	}

	nl80211_send_disconnected(wiphy_to_dev(wdev->wiphy), dev,
				  reason, ie, ie_len, from_ap, gfp);

#ifdef CONFIG_WIRELESS_EXT
	memset(&wrqu, 0, sizeof(wrqu));
	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
#endif
}

void cfg80211_disconnected(struct net_device *dev, u16 reason,
			   u8 *ie, size_t ie_len, gfp_t gfp)
{
	__cfg80211_disconnected(dev, gfp, ie, ie_len, reason, true);
}
EXPORT_SYMBOL(cfg80211_disconnected);

int cfg80211_connect(struct cfg80211_registered_device *rdev,
		     struct net_device *dev,
		     struct cfg80211_connect_params *connect)
{
	int err;
	struct wireless_dev *wdev = dev->ieee80211_ptr;

	if (wdev->sme_state != CFG80211_SME_IDLE)
		return -EALREADY;

	if (!rdev->ops->connect) {
		if (!rdev->ops->auth || !rdev->ops->assoc)
			return -EOPNOTSUPP;

		if (WARN_ON(wdev->conn))
			return -EINPROGRESS;

		wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
		if (!wdev->conn)
			return -ENOMEM;

		/*
		 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
		 */
		memcpy(&wdev->conn->params, connect, sizeof(*connect));
		if (connect->bssid) {
			wdev->conn->params.bssid = wdev->conn->bssid;
			memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
		}

		if (connect->ie) {
			wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
						GFP_KERNEL);
			wdev->conn->params.ie = wdev->conn->ie;
			if (!wdev->conn->ie) {
				kfree(wdev->conn);
				wdev->conn = NULL;
				return -ENOMEM;
			}
		}

		if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
			wdev->conn->auto_auth = true;
			/* start with open system ... should mostly work */
			wdev->conn->params.auth_type =
				NL80211_AUTHTYPE_OPEN_SYSTEM;
		} else {
			wdev->conn->auto_auth = false;
		}

		memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
		wdev->ssid_len = connect->ssid_len;
		wdev->conn->params.ssid = wdev->ssid;
		wdev->conn->params.ssid_len = connect->ssid_len;

		/* don't care about result -- but fill bssid & channel */
		if (!wdev->conn->params.bssid || !wdev->conn->params.channel)
			cfg80211_get_conn_bss(wdev);

		wdev->sme_state = CFG80211_SME_CONNECTING;

		/* we're good if we have both BSSID and channel */
		if (wdev->conn->params.bssid && wdev->conn->params.channel) {
			wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
			err = cfg80211_conn_do_work(wdev);
		} else {
			/* otherwise we'll need to scan for the AP first */
			err = cfg80211_conn_scan(wdev);
			/*
			 * If we can't scan right now, then we need to scan again
			 * after the current scan finished, since the parameters
			 * changed (unless we find a good AP anyway).
			 */
			if (err == -EBUSY) {
				err = 0;
				wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
			}
		}
		if (err) {
			kfree(wdev->conn);
			wdev->conn = NULL;
			wdev->sme_state = CFG80211_SME_IDLE;
		}

		return err;
	} else {
		wdev->sme_state = CFG80211_SME_CONNECTING;
		err = rdev->ops->connect(&rdev->wiphy, dev, connect);
		if (err) {
			wdev->sme_state = CFG80211_SME_IDLE;
			return err;
		}

		memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
		wdev->ssid_len = connect->ssid_len;

		return 0;
	}
}

int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
			struct net_device *dev, u16 reason, bool wextev)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	if (wdev->sme_state == CFG80211_SME_IDLE)
		return -EINVAL;

	if (!rdev->ops->disconnect) {
		if (!rdev->ops->deauth)
			return -EOPNOTSUPP;

		/* was it connected by userspace SME? */
		if (!wdev->conn) {
			cfg80211_mlme_down(rdev, dev);
			return 0;
		}

		if (wdev->sme_state == CFG80211_SME_CONNECTING &&
		    (wdev->conn->state == CFG80211_CONN_SCANNING ||
		     wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
			wdev->sme_state = CFG80211_SME_IDLE;
			kfree(wdev->conn);
			wdev->conn = NULL;
			return 0;
		}

		/* wdev->conn->params.bssid must be set if > SCANNING */
		err = cfg80211_mlme_deauth(rdev, dev, wdev->conn->params.bssid,
					   NULL, 0, reason);
		if (err)
			return err;
	} else {
		err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
		if (err)
			return err;
	}

	if (wdev->sme_state == CFG80211_SME_CONNECTED)
		__cfg80211_disconnected(dev, GFP_KERNEL, NULL, 0, 0, false);
	else if (wdev->sme_state == CFG80211_SME_CONNECTING)
		__cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
					  WLAN_STATUS_UNSPECIFIED_FAILURE,
					  wextev, GFP_KERNEL);

	return 0;
}

void cfg80211_sme_disassoc(struct net_device *dev, int idx)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	u8 bssid[ETH_ALEN];

	if (!wdev->conn)
		return;

	if (wdev->conn->state == CFG80211_CONN_IDLE)
		return;

	/*
	 * Ok, so the association was made by this SME -- we don't
	 * want it any more so deauthenticate too.
	 */

	if (!wdev->auth_bsses[idx])
		return;

	memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
	if (cfg80211_mlme_deauth(rdev, dev, bssid,
				 NULL, 0, WLAN_REASON_DEAUTH_LEAVING)) {
		/* whatever -- assume gone anyway */
		cfg80211_unhold_bss(wdev->auth_bsses[idx]);
		cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
		wdev->auth_bsses[idx] = NULL;
	}
}
Commit	Line	Data
b23aa676 SO	1	/*
	2	* SME code for cfg80211's connect emulation.
	3	*
	4	* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
	5	* Copyright (C) 2009 Intel Corporation. All rights reserved.
	6	*/
	7
	8	#include <linux/etherdevice.h>
	9	#include <linux/if_arp.h>
	10	#include <linux/workqueue.h>
	11	#include <net/cfg80211.h>
	12	#include <net/rtnetlink.h>
	13	#include "nl80211.h"
	14
6829c878 JB	15	struct cfg80211_conn {
	16	struct cfg80211_connect_params params;
	17	/* these are sub-states of the _CONNECTING sme_state */
	18	enum {
	19	CFG80211_CONN_IDLE,
	20	CFG80211_CONN_SCANNING,
	21	CFG80211_CONN_SCAN_AGAIN,
	22	CFG80211_CONN_AUTHENTICATE_NEXT,
	23	CFG80211_CONN_AUTHENTICATING,
	24	CFG80211_CONN_ASSOCIATE_NEXT,
	25	CFG80211_CONN_ASSOCIATING,
	26	} state;
	27	u8 bssid[ETH_ALEN];
	28	u8 *ie;
	29	size_t ie_len;
	30	bool auto_auth;
	31	};
	32
	33
	34	static int cfg80211_conn_scan(struct wireless_dev *wdev)
	35	{
	36	struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
	37	struct cfg80211_scan_request *request;
	38	int n_channels, err;
	39
	40	ASSERT_RTNL();
	41
	42	if (drv->scan_req)
	43	return -EBUSY;
	44
	45	if (wdev->conn->params.channel) {
	46	n_channels = 1;
	47	} else {
	48	enum ieee80211_band band;
	49	n_channels = 0;
	50
	51	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	52	if (!wdev->wiphy->bands[band])
	53	continue;
	54	n_channels += wdev->wiphy->bands[band]->n_channels;
	55	}
	56	}
	57	request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
	58	sizeof(request->channels[0]) * n_channels,
	59	GFP_KERNEL);
	60	if (!request)
	61	return -ENOMEM;
	62
	63	request->channels = (void )((char )request + sizeof(*request));
	64	if (wdev->conn->params.channel)
	65	request->channels[0] = wdev->conn->params.channel;
	66	else {
	67	int i = 0, j;
	68	enum ieee80211_band band;
	69
	70	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	71	if (!wdev->wiphy->bands[band])
	72	continue;
	73	for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
	74	i++, j++)
	75	request->channels[i] =
	76	&wdev->wiphy->bands[band]->channels[j];
	77	}
	78	}
79	request->n_channels = n_channels;
80	request->ssids = (void *)(request->channels + n_channels);
81	request->n_ssids = 1;
82
83	memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
84	wdev->conn->params.ssid_len);
85	request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
86
87	request->ifidx = wdev->netdev->ifindex;
88	request->wiphy = &drv->wiphy;
89
90	drv->scan_req = request;
91
92	err = drv->ops->scan(wdev->wiphy, wdev->netdev, request);
93	if (!err) {
94	wdev->conn->state = CFG80211_CONN_SCANNING;
95	nl80211_send_scan_start(drv, wdev->netdev);
96	} else {
97	drv->scan_req = NULL;
98	kfree(request);
99	}
100	return err;
101	}
102
103	static int cfg80211_conn_do_work(struct wireless_dev *wdev)
104	{
105	struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
19957bb3 JB	106	struct cfg80211_connect_params *params;
19957bb3 JB	107	int err;
6829c878 JB	108
	109	if (!wdev->conn)
	110	return 0;
	111
19957bb3 JB	112	params = &wdev->conn->params;
19957bb3 JB	113
6829c878 JB	114	switch (wdev->conn->state) {
	115	case CFG80211_CONN_SCAN_AGAIN:
	116	return cfg80211_conn_scan(wdev);
	117	case CFG80211_CONN_AUTHENTICATE_NEXT:
6829c878	118	BUG_ON(!drv->ops->auth);
19957bb3 JB	119	wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
	120	return cfg80211_mlme_auth(drv, wdev->netdev,
	121	params->channel, params->auth_type,
	122	params->bssid,
	123	params->ssid, params->ssid_len,
	124	NULL, 0);
6829c878	125	case CFG80211_CONN_ASSOCIATE_NEXT:
6829c878	126	BUG_ON(!drv->ops->assoc);
19957bb3	127	wdev->conn->state = CFG80211_CONN_ASSOCIATING;
3e5d7649 JB	128	/*
	129	* We could, later, implement roaming here and then actually
	130	* set prev_bssid to non-NULL. But then we need to be aware
	131	* that some APs don't like that -- so we'd need to retry
	132	* the association.
	133	*/
19957bb3	134	err = cfg80211_mlme_assoc(drv, wdev->netdev,
3e5d7649	135	params->channel, params->bssid, NULL,
19957bb3 JB	136	params->ssid, params->ssid_len,
	137	params->ie, params->ie_len,
	138	false, &params->crypto);
	139	if (err)
	140	cfg80211_mlme_deauth(drv, wdev->netdev, params->bssid,
	141	NULL, 0, WLAN_REASON_DEAUTH_LEAVING);
	142	return err;
6829c878 JB	143	default:
	144	return 0;
	145	}
	146	}
	147
	148	void cfg80211_conn_work(struct work_struct *work)
	149	{
	150	struct cfg80211_registered_device *drv =
	151	container_of(work, struct cfg80211_registered_device, conn_work);
	152	struct wireless_dev *wdev;
	153
	154	rtnl_lock();
	155	mutex_lock(&drv->devlist_mtx);
	156
	157	list_for_each_entry(wdev, &drv->netdev_list, list) {
	158	if (!netif_running(wdev->netdev))
	159	continue;
	160	if (wdev->sme_state != CFG80211_SME_CONNECTING)
	161	continue;
	162	if (cfg80211_conn_do_work(wdev))
	163	cfg80211_connect_result(wdev->netdev,
	164	wdev->conn->params.bssid,
	165	NULL, 0, NULL, 0,
	166	WLAN_STATUS_UNSPECIFIED_FAILURE,
	167	GFP_ATOMIC);
	168	}
	169
	170	mutex_unlock(&drv->devlist_mtx);
	171	rtnl_unlock();
	172	}
	173
	174	static bool cfg80211_get_conn_bss(struct wireless_dev *wdev)
	175	{
	176	struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
	177	struct cfg80211_bss *bss;
	178	u16 capa = WLAN_CAPABILITY_ESS;
	179
	180	if (wdev->conn->params.privacy)
	181	capa \|= WLAN_CAPABILITY_PRIVACY;
	182
	183	bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid,
	184	wdev->conn->params.ssid,
	185	wdev->conn->params.ssid_len,
	186	WLAN_CAPABILITY_ESS \| WLAN_CAPABILITY_PRIVACY,
	187	capa);
6829c878 JB	188	if (!bss)
	189	return false;
	190
	191	memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
	192	wdev->conn->params.bssid = wdev->conn->bssid;
	193	wdev->conn->params.channel = bss->channel;
	194	wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
	195	schedule_work(&drv->conn_work);
	196
	197	cfg80211_put_bss(bss);
	198	return true;
	199	}
	200
	201	void cfg80211_sme_scan_done(struct net_device *dev)
	202	{
	203	struct wireless_dev *wdev = dev->ieee80211_ptr;
	204	struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
	205
	206	if (wdev->sme_state != CFG80211_SME_CONNECTING)
	207	return;
	208
	209	if (WARN_ON(!wdev->conn))
	210	return;
	211
	212	if (wdev->conn->state != CFG80211_CONN_SCANNING &&
	213	wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
	214	return;
	215
	216	if (!cfg80211_get_conn_bss(wdev)) {
	217	/* not found */
	218	if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
	219	schedule_work(&drv->conn_work);
	220	else
	221	cfg80211_connect_result(dev, wdev->conn->params.bssid,
	222	NULL, 0, NULL, 0,
	223	WLAN_STATUS_UNSPECIFIED_FAILURE,
	224	GFP_ATOMIC);
	225	return;
	226	}
	227	}
	228
	229	void cfg80211_sme_rx_auth(struct net_device dev, const u8 buf, size_t len)
	230	{
	231	struct wireless_dev *wdev = dev->ieee80211_ptr;
	232	struct wiphy *wiphy = wdev->wiphy;
	233	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
	234	struct ieee80211_mgmt mgmt = (struct ieee80211_mgmt )buf;
	235	u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
	236
	237	/* should only RX auth frames when connecting */
	238	if (wdev->sme_state != CFG80211_SME_CONNECTING)
	239	return;
	240
	241	if (WARN_ON(!wdev->conn))
	242	return;
	243
	244	if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
	245	wdev->conn->auto_auth &&
	246	wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
	247	/* select automatically between only open, shared, leap */
	248	switch (wdev->conn->params.auth_type) {
	249	case NL80211_AUTHTYPE_OPEN_SYSTEM:
	250	wdev->conn->params.auth_type =
	251	NL80211_AUTHTYPE_SHARED_KEY;
252	break;
253	case NL80211_AUTHTYPE_SHARED_KEY:
254	wdev->conn->params.auth_type =
255	NL80211_AUTHTYPE_NETWORK_EAP;
256	break;
257	default:
258	/* huh? */
259	wdev->conn->params.auth_type =
260	NL80211_AUTHTYPE_OPEN_SYSTEM;
261	break;
262	}
263	wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
264	schedule_work(&rdev->conn_work);
19957bb3	265	} else if (status_code != WLAN_STATUS_SUCCESS) {
6829c878	266	wdev->sme_state = CFG80211_SME_IDLE;
19957bb3 JB	267	kfree(wdev->conn);
	268	wdev->conn = NULL;
	269	} else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
6829c878 JB	270	wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
	271	wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
	272	schedule_work(&rdev->conn_work);
	273	}
	274	}
b23aa676	275
f2129354 JB	276	static void __cfg80211_connect_result(struct net_device dev, const u8 bssid,
	277	const u8 *req_ie, size_t req_ie_len,
	278	const u8 *resp_ie, size_t resp_ie_len,
	279	u16 status, bool wextev, gfp_t gfp)
b23aa676 SO	280	{
	281	struct wireless_dev *wdev = dev->ieee80211_ptr;
	282	struct cfg80211_bss *bss;
	283	#ifdef CONFIG_WIRELESS_EXT
	284	union iwreq_data wrqu;
	285	#endif
	286
	287	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
	288	return;
	289
e45cd82a JB	290	if (wdev->sme_state == CFG80211_SME_CONNECTED)
	291	nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), dev,
	292	bssid, req_ie, req_ie_len,
	293	resp_ie, resp_ie_len, gfp);
	294	else
	295	nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
	296	bssid, req_ie, req_ie_len,
	297	resp_ie, resp_ie_len,
	298	status, gfp);
	299
	300	#ifdef CONFIG_WIRELESS_EXT
	301	if (wextev) {
	302	if (req_ie && status == WLAN_STATUS_SUCCESS) {
	303	memset(&wrqu, 0, sizeof(wrqu));
	304	wrqu.data.length = req_ie_len;
	305	wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, req_ie);
	306	}
	307
	308	if (resp_ie && status == WLAN_STATUS_SUCCESS) {
	309	memset(&wrqu, 0, sizeof(wrqu));
	310	wrqu.data.length = resp_ie_len;
	311	wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
	312	}
	313
	314	memset(&wrqu, 0, sizeof(wrqu));
	315	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
	316	if (bssid && status == WLAN_STATUS_SUCCESS)
	317	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	318	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	319	}
	320	#endif
	321
	322	if (status == WLAN_STATUS_SUCCESS &&
	323	wdev->sme_state == CFG80211_SME_IDLE) {
	324	wdev->sme_state = CFG80211_SME_CONNECTED;
	325	return;
	326	}
	327
6829c878	328	if (wdev->sme_state != CFG80211_SME_CONNECTING)
b23aa676 SO	329	return;
	330
	331	if (wdev->current_bss) {
	332	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	333	cfg80211_put_bss(&wdev->current_bss->pub);
b23aa676 SO	334	wdev->current_bss = NULL;
	335	}
	336
19957bb3 JB	337	if (wdev->conn)
	338	wdev->conn->state = CFG80211_CONN_IDLE;
	339
b23aa676 SO	340	if (status == WLAN_STATUS_SUCCESS) {
	341	bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
	342	wdev->ssid, wdev->ssid_len,
	343	WLAN_CAPABILITY_ESS,
	344	WLAN_CAPABILITY_ESS);
	345
	346	if (WARN_ON(!bss))
	347	return;
	348
19957bb3 JB	349	cfg80211_hold_bss(bss_from_pub(bss));
19957bb3 JB	350	wdev->current_bss = bss_from_pub(bss);
b23aa676 SO	351
	352	wdev->sme_state = CFG80211_SME_CONNECTED;
	353	} else {
	354	wdev->sme_state = CFG80211_SME_IDLE;
19957bb3 JB	355	kfree(wdev->conn);
19957bb3 JB	356	wdev->conn = NULL;
b23aa676	357	}
b23aa676	358	}
f2129354 JB	359
	360	void cfg80211_connect_result(struct net_device dev, const u8 bssid,
	361	const u8 *req_ie, size_t req_ie_len,
	362	const u8 *resp_ie, size_t resp_ie_len,
	363	u16 status, gfp_t gfp)
	364	{
	365	bool wextev = status == WLAN_STATUS_SUCCESS;
	366	__cfg80211_connect_result(dev, bssid, req_ie, req_ie_len, resp_ie, resp_ie_len, status, wextev, gfp);
	367	}
b23aa676 SO	368	EXPORT_SYMBOL(cfg80211_connect_result);
	369
	370	void cfg80211_roamed(struct net_device dev, const u8 bssid,
	371	const u8 *req_ie, size_t req_ie_len,
	372	const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
	373	{
	374	struct wireless_dev *wdev = dev->ieee80211_ptr;
	375	struct cfg80211_bss *bss;
	376	#ifdef CONFIG_WIRELESS_EXT
	377	union iwreq_data wrqu;
	378	#endif
	379
	380	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
	381	return;
	382
	383	if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
	384	return;
	385
	386	/* internal error -- how did we get to CONNECTED w/o BSS? */
	387	if (WARN_ON(!wdev->current_bss)) {
	388	return;
	389	}
	390
	391	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	392	cfg80211_put_bss(&wdev->current_bss->pub);
b23aa676 SO	393	wdev->current_bss = NULL;
	394
	395	bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
	396	wdev->ssid, wdev->ssid_len,
	397	WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
	398
	399	if (WARN_ON(!bss))
	400	return;
	401
19957bb3 JB	402	cfg80211_hold_bss(bss_from_pub(bss));
19957bb3 JB	403	wdev->current_bss = bss_from_pub(bss);
b23aa676 SO	404
	405	nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), dev, bssid,
	406	req_ie, req_ie_len, resp_ie, resp_ie_len, gfp);
	407
	408	#ifdef CONFIG_WIRELESS_EXT
	409	if (req_ie) {
	410	memset(&wrqu, 0, sizeof(wrqu));
	411	wrqu.data.length = req_ie_len;
	412	wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, req_ie);
	413	}
	414
	415	if (resp_ie) {
	416	memset(&wrqu, 0, sizeof(wrqu));
	417	wrqu.data.length = resp_ie_len;
	418	wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
	419	}
	420
	421	memset(&wrqu, 0, sizeof(wrqu));
	422	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
	423	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	424	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	425	#endif
	426	}
	427	EXPORT_SYMBOL(cfg80211_roamed);
	428
6829c878 JB	429	void __cfg80211_disconnected(struct net_device dev, gfp_t gfp, u8 ie,
6829c878 JB	430	size_t ie_len, u16 reason, bool from_ap)
b23aa676 SO	431	{
	432	struct wireless_dev *wdev = dev->ieee80211_ptr;
	433	#ifdef CONFIG_WIRELESS_EXT
	434	union iwreq_data wrqu;
	435	#endif
	436
	437	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
	438	return;
	439
	440	if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
	441	return;
	442
	443	if (wdev->current_bss) {
	444	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	445	cfg80211_put_bss(&wdev->current_bss->pub);
b23aa676 SO	446	}
	447
	448	wdev->current_bss = NULL;
	449	wdev->sme_state = CFG80211_SME_IDLE;
	450
6829c878 JB	451	if (wdev->conn) {
	452	kfree(wdev->conn->ie);
	453	wdev->conn->ie = NULL;
19957bb3 JB	454	kfree(wdev->conn);
19957bb3 JB	455	wdev->conn = NULL;
6829c878 JB	456	}
6829c878 JB	457
b23aa676 SO	458	nl80211_send_disconnected(wiphy_to_dev(wdev->wiphy), dev,
	459	reason, ie, ie_len, from_ap, gfp);
	460
	461	#ifdef CONFIG_WIRELESS_EXT
	462	memset(&wrqu, 0, sizeof(wrqu));
	463	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
	464	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	465	#endif
	466	}
	467
	468	void cfg80211_disconnected(struct net_device *dev, u16 reason,
	469	u8 *ie, size_t ie_len, gfp_t gfp)
	470	{
6829c878	471	__cfg80211_disconnected(dev, gfp, ie, ie_len, reason, true);
b23aa676 SO	472	}
	473	EXPORT_SYMBOL(cfg80211_disconnected);
	474
	475	int cfg80211_connect(struct cfg80211_registered_device *rdev,
	476	struct net_device *dev,
	477	struct cfg80211_connect_params *connect)
	478	{
	479	int err;
	480	struct wireless_dev *wdev = dev->ieee80211_ptr;
	481
	482	if (wdev->sme_state != CFG80211_SME_IDLE)
	483	return -EALREADY;
	484
	485	if (!rdev->ops->connect) {
6829c878 JB	486	if (!rdev->ops->auth \|\| !rdev->ops->assoc)
	487	return -EOPNOTSUPP;
	488
19957bb3 JB	489	if (WARN_ON(wdev->conn))
	490	return -EINPROGRESS;
	491
	492	wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
	493	if (!wdev->conn)
	494	return -ENOMEM;
6829c878 JB	495
	496	/*
	497	* Copy all parameters, and treat explicitly IEs, BSSID, SSID.
	498	*/
	499	memcpy(&wdev->conn->params, connect, sizeof(*connect));
	500	if (connect->bssid) {
	501	wdev->conn->params.bssid = wdev->conn->bssid;
	502	memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
	503	}
	504
	505	if (connect->ie) {
	506	wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
	507	GFP_KERNEL);
	508	wdev->conn->params.ie = wdev->conn->ie;
19957bb3 JB	509	if (!wdev->conn->ie) {
	510	kfree(wdev->conn);
	511	wdev->conn = NULL;
6829c878	512	return -ENOMEM;
19957bb3	513	}
6829c878 JB	514	}
	515
	516	if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
	517	wdev->conn->auto_auth = true;
	518	/* start with open system ... should mostly work */
	519	wdev->conn->params.auth_type =
	520	NL80211_AUTHTYPE_OPEN_SYSTEM;
	521	} else {
	522	wdev->conn->auto_auth = false;
	523	}
	524
	525	memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
	526	wdev->ssid_len = connect->ssid_len;
	527	wdev->conn->params.ssid = wdev->ssid;
	528	wdev->conn->params.ssid_len = connect->ssid_len;
	529
	530	/* don't care about result -- but fill bssid & channel */
	531	if (!wdev->conn->params.bssid \|\| !wdev->conn->params.channel)
	532	cfg80211_get_conn_bss(wdev);
	533
	534	wdev->sme_state = CFG80211_SME_CONNECTING;
	535
	536	/* we're good if we have both BSSID and channel */
	537	if (wdev->conn->params.bssid && wdev->conn->params.channel) {
	538	wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
	539	err = cfg80211_conn_do_work(wdev);
	540	} else {
	541	/* otherwise we'll need to scan for the AP first */
	542	err = cfg80211_conn_scan(wdev);
	543	/*
	544	* If we can't scan right now, then we need to scan again
	545	* after the current scan finished, since the parameters
	546	* changed (unless we find a good AP anyway).
	547	*/
	548	if (err == -EBUSY) {
	549	err = 0;
	550	wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
	551	}
	552	}
19957bb3 JB	553	if (err) {
	554	kfree(wdev->conn);
	555	wdev->conn = NULL;
6829c878	556	wdev->sme_state = CFG80211_SME_IDLE;
19957bb3	557	}
6829c878 JB	558
6829c878 JB	559	return err;
b23aa676 SO	560	} else {
	561	wdev->sme_state = CFG80211_SME_CONNECTING;
	562	err = rdev->ops->connect(&rdev->wiphy, dev, connect);
	563	if (err) {
	564	wdev->sme_state = CFG80211_SME_IDLE;
	565	return err;
	566	}
b23aa676	567
6829c878 JB	568	memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
6829c878 JB	569	wdev->ssid_len = connect->ssid_len;
b23aa676	570
6829c878 JB	571	return 0;
6829c878 JB	572	}
b23aa676 SO	573	}
	574
	575	int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
f2129354	576	struct net_device *dev, u16 reason, bool wextev)
b23aa676	577	{
6829c878	578	struct wireless_dev *wdev = dev->ieee80211_ptr;
b23aa676 SO	579	int err;
b23aa676 SO	580
6829c878 JB	581	if (wdev->sme_state == CFG80211_SME_IDLE)
	582	return -EINVAL;
	583
b23aa676	584	if (!rdev->ops->disconnect) {
19957bb3 JB	585	if (!rdev->ops->deauth)
19957bb3 JB	586	return -EOPNOTSUPP;
6829c878	587
19957bb3 JB	588	/* was it connected by userspace SME? */
	589	if (!wdev->conn) {
	590	cfg80211_mlme_down(rdev, dev);
	591	return 0;
	592	}
6829c878 JB	593
	594	if (wdev->sme_state == CFG80211_SME_CONNECTING &&
	595	(wdev->conn->state == CFG80211_CONN_SCANNING \|\|
	596	wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
	597	wdev->sme_state = CFG80211_SME_IDLE;
19957bb3 JB	598	kfree(wdev->conn);
19957bb3 JB	599	wdev->conn = NULL;
6829c878 JB	600	return 0;
	601	}
	602
6829c878	603	/* wdev->conn->params.bssid must be set if > SCANNING */
19957bb3 JB	604	err = cfg80211_mlme_deauth(rdev, dev, wdev->conn->params.bssid,
19957bb3 JB	605	NULL, 0, reason);
6829c878 JB	606	if (err)
6829c878 JB	607	return err;
b23aa676 SO	608	} else {
	609	err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
	610	if (err)
	611	return err;
	612	}
	613
6829c878 JB	614	if (wdev->sme_state == CFG80211_SME_CONNECTED)
	615	__cfg80211_disconnected(dev, GFP_KERNEL, NULL, 0, 0, false);
	616	else if (wdev->sme_state == CFG80211_SME_CONNECTING)
f2129354 JB	617	__cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
	618	WLAN_STATUS_UNSPECIFIED_FAILURE,
	619	wextev, GFP_KERNEL);
b23aa676 SO	620
	621	return 0;
	622	}
19957bb3 JB	623
	624	void cfg80211_sme_disassoc(struct net_device *dev, int idx)
	625	{
	626	struct wireless_dev *wdev = dev->ieee80211_ptr;
	627	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	628	u8 bssid[ETH_ALEN];
	629
	630	if (!wdev->conn)
	631	return;
	632
	633	if (wdev->conn->state == CFG80211_CONN_IDLE)
	634	return;
	635
	636	/*
	637	* Ok, so the association was made by this SME -- we don't
	638	* want it any more so deauthenticate too.
	639	*/
	640
	641	if (!wdev->auth_bsses[idx])
	642	return;
	643
	644	memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
	645	if (cfg80211_mlme_deauth(rdev, dev, bssid,
	646	NULL, 0, WLAN_REASON_DEAUTH_LEAVING)) {
	647	/* whatever -- assume gone anyway */
	648	cfg80211_unhold_bss(wdev->auth_bsses[idx]);
	649	cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
	650	wdev->auth_bsses[idx] = NULL;
	651	}
	652	}