cfg80211: emulate connect with auth/assoc

This adds code to cfg80211 so that drivers (mac80211 right
now) that don't implement connect but rather auth/assoc can
still be used with the nl80211 connect command. This will
also be necessary for the wext compat code.

Signed-off-by: Samuel Ortiz <samuel.ortiz@intel.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

7 files changed, 474 insertions, 32 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 68e11321ed74..24fab439d415 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1209,6 +1209,9 @@ extern void wiphy_unregister(struct wiphy *wiphy);
  */
 extern void wiphy_free(struct wiphy *wiphy);
 
+/* internal struct */
+struct cfg80211_conn;
+
 /**
  * struct wireless_dev - wireless per-netdev state
  *
@@ -1242,9 +1245,10 @@ struct wireless_dev {
 	u8 ssid_len;
 	enum {
 		CFG80211_SME_IDLE,
-		CFG80211_SME_CONNECTING, /* ->connect called */
+		CFG80211_SME_CONNECTING,
 		CFG80211_SME_CONNECTED,
 	} sme_state;
+	struct cfg80211_conn *conn;
 
 #ifdef CONFIG_WIRELESS_EXT
 	/* wext data */
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 314e00f70e3b..a0a679704612 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -321,6 +321,7 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
 	}
 
 	INIT_WORK(&drv->rfkill_sync, cfg80211_rfkill_sync_work);
+	INIT_WORK(&drv->conn_work, cfg80211_conn_work);
 
 	/*
 	 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
@@ -481,6 +482,8 @@ void wiphy_unregister(struct wiphy *wiphy)
 	/* unlock again before freeing */
 	mutex_unlock(&drv->mtx);
 
+	cancel_work_sync(&drv->conn_work);
+
 	cfg80211_debugfs_drv_del(drv);
 
 	/* If this device got a regulatory hint tell core its
@@ -569,6 +572,10 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
 			break;
 		}
 		break;
+	case NETDEV_DOWN:
+		kfree(wdev->conn);
+		wdev->conn = NULL;
+		break;
 	case NETDEV_UP:
 #ifdef CONFIG_WIRELESS_EXT
 		if (wdev->iftype != NL80211_IFTYPE_ADHOC)
diff --git a/net/wireless/core.h b/net/wireless/core.h
index f93f96f85d2b..2c0f64252f3d 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -62,6 +62,8 @@ struct cfg80211_registered_device {
 	struct genl_info *testmode_info;
 #endif
 
+	struct work_struct conn_work;
+
 #ifdef CONFIG_CFG80211_DEBUGFS
 	/* Debugfs entries */
 	struct wiphy_debugfsdentries {
@@ -181,8 +183,14 @@ int cfg80211_connect(struct cfg80211_registered_device *rdev,
 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 			struct net_device *dev, u16 reason);
 
+void cfg80211_conn_work(struct work_struct *work);
+
 /* internal helpers */
 int cfg80211_validate_key_settings(struct key_params *params, int key_idx,
 				   const u8 *mac_addr);
+void __cfg80211_disconnected(struct net_device *dev, gfp_t gfp, u8 *ie,
+			     size_t ie_len, u16 reason, bool from_ap);
+void cfg80211_sme_scan_done(struct net_device *dev);
+void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
 
 #endif /* __NET_WIRELESS_CORE_H */
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index c4e6d4b84a46..3427fe73d3c3 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -16,58 +16,105 @@ void cfg80211_send_rx_auth(struct net_device *dev, const u8 *buf, size_t len, gf
 {
 	struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+
 	nl80211_send_rx_auth(rdev, dev, buf, len, gfp);
+	cfg80211_sme_rx_auth(dev, buf, len);
 }
 EXPORT_SYMBOL(cfg80211_send_rx_auth);
 
 void cfg80211_send_rx_assoc(struct net_device *dev, const u8 *buf, size_t len, gfp_t gfp)
 {
-	struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
+	u16 status_code;
+	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;
+	u8 *ie = mgmt->u.assoc_resp.variable;
+	int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
+
+	status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
+
 	nl80211_send_rx_assoc(rdev, dev, buf, len, gfp);
+
+	cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
+				status_code, gfp);
 }
 EXPORT_SYMBOL(cfg80211_send_rx_assoc);
 
 void cfg80211_send_deauth(struct net_device *dev, const u8 *buf, size_t len, gfp_t gfp)
 {
-	struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
+	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;
+
 	nl80211_send_deauth(rdev, dev, buf, len, gfp);
+
+	if (wdev->sme_state == CFG80211_SME_CONNECTED) {
+		u16 reason_code;
+		bool from_ap;
+
+		reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
+
+		from_ap = memcmp(mgmt->da, dev->dev_addr, ETH_ALEN) == 0;
+		__cfg80211_disconnected(dev, gfp, NULL, 0,
+					reason_code, from_ap);
+
+		wdev->sme_state = CFG80211_SME_IDLE;
+	} else if (wdev->sme_state == CFG80211_SME_CONNECTING) {
+		cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
+					WLAN_STATUS_UNSPECIFIED_FAILURE, gfp);
+	}
 }
 EXPORT_SYMBOL(cfg80211_send_deauth);
 
 void cfg80211_send_disassoc(struct net_device *dev, const u8 *buf, size_t len, gfp_t gfp)
 {
-	struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
+	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;
+
 	nl80211_send_disassoc(rdev, dev, buf, len, gfp);
-}
-EXPORT_SYMBOL(cfg80211_send_disassoc);
 
-static void cfg80211_wext_disconnected(struct net_device *dev)
-{
-#ifdef CONFIG_WIRELESS_EXT
-	union iwreq_data wrqu;
-	memset(&wrqu, 0, sizeof(wrqu));
-	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
-#endif
+	if (wdev->sme_state == CFG80211_SME_CONNECTED) {
+		u16 reason_code;
+		bool from_ap;
+
+		reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
+
+		from_ap = memcmp(mgmt->da, dev->dev_addr, ETH_ALEN) == 0;
+		__cfg80211_disconnected(dev, gfp, NULL, 0,
+					reason_code, from_ap);
+
+		wdev->sme_state = CFG80211_SME_IDLE;
+	}
 }
+EXPORT_SYMBOL(cfg80211_send_disassoc);
 
 void cfg80211_send_auth_timeout(struct net_device *dev, const u8 *addr, gfp_t gfp)
 {
-	struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct wiphy *wiphy = wdev->wiphy;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 	nl80211_send_auth_timeout(rdev, dev, addr, gfp);
-	cfg80211_wext_disconnected(dev);
+	if (wdev->sme_state == CFG80211_SME_CONNECTING)
+		cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
+					WLAN_STATUS_UNSPECIFIED_FAILURE, gfp);
+	wdev->sme_state = CFG80211_SME_IDLE;
 }
 EXPORT_SYMBOL(cfg80211_send_auth_timeout);
 
 void cfg80211_send_assoc_timeout(struct net_device *dev, const u8 *addr, gfp_t gfp)
 {
-	struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct wiphy *wiphy = wdev->wiphy;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 	nl80211_send_assoc_timeout(rdev, dev, addr, gfp);
-	cfg80211_wext_disconnected(dev);
+	if (wdev->sme_state == CFG80211_SME_CONNECTING)
+		cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
+					WLAN_STATUS_UNSPECIFIED_FAILURE, gfp);
+	wdev->sme_state = CFG80211_SME_IDLE;
 }
 EXPORT_SYMBOL(cfg80211_send_assoc_timeout);
 
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 89dd3793e03c..89aa9e781d10 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -351,12 +351,12 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 
 #undef CMD
 
-	if (dev->ops->connect) {
+	if (dev->ops->connect || dev->ops->auth) {
 		i++;
 		NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 	}
 
-	if (dev->ops->disconnect) {
+	if (dev->ops->disconnect || dev->ops->deauth) {
 		i++;
 		NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 	}
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 261a06386822..82b33e708488 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -30,6 +30,13 @@ void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted)
 
 	WARN_ON(request != wiphy_to_dev(request->wiphy)->scan_req);
 
+	/*
+	 * This must be before sending the other events!
+	 * Otherwise, wpa_supplicant gets completely confused with
+	 * wext events.
+	 */
+	cfg80211_sme_scan_done(dev);
+
 	if (aborted)
 		nl80211_send_scan_aborted(wiphy_to_dev(request->wiphy), dev);
 	else
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index fc117031d0bb..3abb04729873 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -12,6 +12,266 @@
 #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);
+	union {
+		struct cfg80211_auth_request auth_req;
+		struct cfg80211_assoc_request assoc_req;
+	} u;
+
+	memset(&u, 0, sizeof(u));
+
+	if (!wdev->conn)
+		return 0;
+
+	switch (wdev->conn->state) {
+	case CFG80211_CONN_SCAN_AGAIN:
+		return cfg80211_conn_scan(wdev);
+	case CFG80211_CONN_AUTHENTICATE_NEXT:
+		u.auth_req.chan = wdev->conn->params.channel;
+		u.auth_req.peer_addr = wdev->conn->params.bssid;
+		u.auth_req.ssid = wdev->conn->params.ssid;
+		u.auth_req.ssid_len = wdev->conn->params.ssid_len;
+		u.auth_req.auth_type = wdev->conn->params.auth_type;
+		u.auth_req.ie = NULL;
+		u.auth_req.ie_len = 0;
+		wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
+		BUG_ON(!drv->ops->auth);
+		return drv->ops->auth(wdev->wiphy, wdev->netdev, &u.auth_req);
+	case CFG80211_CONN_ASSOCIATE_NEXT:
+		u.assoc_req.chan = wdev->conn->params.channel;
+		u.assoc_req.peer_addr = wdev->conn->params.bssid;
+		u.assoc_req.ssid = wdev->conn->params.ssid;
+		u.assoc_req.ssid_len = wdev->conn->params.ssid_len;
+		u.assoc_req.ie = wdev->conn->params.ie;
+		u.assoc_req.ie_len = wdev->conn->params.ie_len;
+		u.assoc_req.use_mfp = false;
+		memcpy(&u.assoc_req.crypto, &wdev->conn->params.crypto,
+			sizeof(u.assoc_req.crypto));
+		wdev->conn->state = CFG80211_CONN_ASSOCIATING;
+		BUG_ON(!drv->ops->assoc);
+		return drv->ops->assoc(wdev->wiphy, wdev->netdev,
+					&u.assoc_req);
+	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;
+	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);
+	}
+}
 
 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 			     const u8 *req_ie, size_t req_ie_len,
@@ -27,7 +287,7 @@ void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 		return;
 
-	if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING))
+	if (wdev->sme_state != CFG80211_SME_CONNECTING)
 		return;
 
 	if (wdev->current_bss) {
@@ -53,6 +313,9 @@ void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 		wdev->sme_state = CFG80211_SME_IDLE;
 	}
 
+	if (wdev->conn)
+		wdev->conn->state = CFG80211_CONN_IDLE;
+
 	nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, bssid,
 				    req_ie, req_ie_len, resp_ie, resp_ie_len,
 				    status, gfp);
@@ -72,7 +335,7 @@ void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 
 	memset(&wrqu, 0, sizeof(wrqu));
 	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
-	if (bssid)
+	if (bssid && status == WLAN_STATUS_SUCCESS)
 		memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 #endif
@@ -138,9 +401,8 @@ void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
 }
 EXPORT_SYMBOL(cfg80211_roamed);
 
-static void __cfg80211_disconnected(struct net_device *dev, gfp_t gfp,
-				    u8 *ie, size_t ie_len, u16 reason,
-				    bool from_ap)
+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
@@ -161,6 +423,11 @@ static void __cfg80211_disconnected(struct net_device *dev, gfp_t gfp,
 	wdev->current_bss = NULL;
 	wdev->sme_state = CFG80211_SME_IDLE;
 
+	if (wdev->conn) {
+		kfree(wdev->conn->ie);
+		wdev->conn->ie = NULL;
+	}
+
 	nl80211_send_disconnected(wiphy_to_dev(wdev->wiphy), dev,
 				  reason, ie, ie_len, from_ap, gfp);
 
@@ -174,7 +441,7 @@ static void __cfg80211_disconnected(struct net_device *dev, gfp_t gfp,
 void cfg80211_disconnected(struct net_device *dev, u16 reason,
 			   u8 *ie, size_t ie_len, gfp_t gfp)
 {
-	__cfg80211_disconnected(dev, reason, ie, ie_len, true, gfp);
+	__cfg80211_disconnected(dev, gfp, ie, ie_len, reason, true);
 }
 EXPORT_SYMBOL(cfg80211_disconnected);
 
@@ -189,7 +456,74 @@ int cfg80211_connect(struct cfg80211_registered_device *rdev,
 		return -EALREADY;
 
 	if (!rdev->ops->connect) {
-		return -EOPNOTSUPP;
+		if (!rdev->ops->auth || !rdev->ops->assoc)
+			return -EOPNOTSUPP;
+
+		if (!wdev->conn) {
+			wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
+			if (!wdev->conn)
+				return -ENOMEM;
+		} else
+			memset(wdev->conn, 0, sizeof(*wdev->conn));
+
+		/*
+		 * 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)
+				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)
+			wdev->sme_state = CFG80211_SME_IDLE;
+
+		return err;
 	} else {
 		wdev->sme_state = CFG80211_SME_CONNECTING;
 		err = rdev->ops->connect(&rdev->wiphy, dev, connect);
@@ -197,28 +531,63 @@ int cfg80211_connect(struct cfg80211_registered_device *rdev,
 			wdev->sme_state = CFG80211_SME_IDLE;
 			return err;
 		}
-	}
 
-	memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
-	wdev->ssid_len = connect->ssid_len;
+		memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
+		wdev->ssid_len = connect->ssid_len;
 
-	return 0;
+		return 0;
+	}
 }
 
 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 			struct net_device *dev, u16 reason)
 {
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	int err;
 
+	if (wdev->sme_state == CFG80211_SME_IDLE)
+		return -EINVAL;
+
 	if (!rdev->ops->disconnect) {
-		return -EOPNOTSUPP;
+		struct cfg80211_deauth_request deauth;
+		u8 bssid[ETH_ALEN];
+
+		/* internal bug. */
+		if (WARN_ON(!wdev->conn))
+			return -EINVAL;
+
+		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;
+			return 0;
+		}
+
+		if (!rdev->ops->deauth)
+			return -EOPNOTSUPP;
+
+		memset(&deauth, 0, sizeof(deauth));
+
+		/* wdev->conn->params.bssid must be set if > SCANNING */
+		memcpy(bssid, wdev->conn->params.bssid, ETH_ALEN);
+		deauth.peer_addr = bssid;
+		deauth.reason_code = reason;
+
+		err = rdev->ops->deauth(&rdev->wiphy, dev, &deauth);
+		if (err)
+			return err;
 	} else {
 		err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
 		if (err)
 			return err;
 	}
 
-	__cfg80211_disconnected(dev, 0, NULL, 0, false, GFP_KERNEL);
+	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,
+					GFP_KERNEL);
 
 	return 0;
 }