wifi: Dont start new connection until disassociation completes

Make sure disconnect is completed before start new connection
otherwise we will disconnect the new network when we receive
DISCONNECT signal from supplicant.

plugins/wifi.c

@@ -60,8 +60,10 @@ struct wifi_data {
 	char *identifier;
 	struct connman_device *device;
 	struct connman_network *network;
+	struct connman_network *pending_network;
 	GSupplicantInterface *interface;
 	connman_bool_t connected;
+	connman_bool_t disconnecting;
 	int index;
 	unsigned flags;
 	unsigned int watch;
@@ -144,6 +146,7 @@ static int wifi_probe(struct connman_device *device)
 		return -ENOMEM;
 
 	wifi->connected = FALSE;
+	wifi->disconnecting = FALSE;
 
 	connman_device_set_data(device, wifi);
 	wifi->device = connman_device_ref(device);
@@ -163,6 +166,11 @@ static void wifi_remove(struct connman_device *device)
 
 	DBG("device %p", device);
 
+	if (wifi->pending_network != NULL) {
+		connman_network_unref(wifi->pending_network);
+		wifi->pending_network = NULL;
+	}
+
 	connman_device_set_data(device, NULL);
 	connman_device_unref(wifi->device);
 	connman_rtnl_remove_watch(wifi->watch);
@@ -224,6 +232,12 @@ static int wifi_disable(struct connman_device *device)
 	DBG("device %p", device);
 
 	wifi->connected = FALSE;
+	wifi->disconnecting = FALSE;
+
+	if (wifi->pending_network != NULL) {
+		connman_network_unref(wifi->pending_network);
+		wifi->pending_network = NULL;
+	}
 
 	return g_supplicant_interface_remove(wifi->interface,
 						interface_remove_callback,
@@ -520,22 +534,6 @@ static void connect_callback(int result, GSupplicantInterface *interface,
 	connman_error("%s", __func__);
 }
 
-static void disconnect_callback(int result, GSupplicantInterface *interface,
-							void *user_data)
-{
-	struct wifi_data *wifi = user_data;
-
-	if (result < 0) {
-		connman_error("%s", __func__);
-		return;
-	}
-
-	connman_network_unref(wifi->network);
-
-	wifi->network = NULL;
-}
-
-
 static GSupplicantSecurity network_security(const char *security)
 {
 	if (g_str_equal(security, "none") == TRUE)
@@ -612,16 +610,54 @@ static int network_connect(struct connman_network *network)
 
 	ssid_init(&ssid, network);
 
-	wifi->network = connman_network_ref(network);
+	if (wifi->disconnecting == TRUE)
+		wifi->pending_network = connman_network_ref(network);
+	else {
+		wifi->network = connman_network_ref(network);
 
-	return g_supplicant_interface_connect(interface, &ssid,
+		return g_supplicant_interface_connect(interface, &ssid,
 						connect_callback, NULL);
+	}
+
+	return -EINPROGRESS;
+}
+
+static void disconnect_callback(int result, GSupplicantInterface *interface,
+								void *user_data)
+{
+	struct wifi_data *wifi = user_data;
+
+	if (wifi->network != NULL) {
+		/*
+		 * if result < 0 supplican return an error because
+		 * the network is not current.
+		 * we wont receive G_SUPPLICANT_STATE_DISCONNECTED since it
+		 * failed, call connman_network_set_connected to report
+		 * disconnect is completed.
+		 */
+		if (result < 0)
+			connman_network_set_connected(wifi->network, FALSE);
+
+		connman_network_unref(wifi->network);
+	}
+
+	wifi->network = NULL;
+
+	wifi->disconnecting = FALSE;
+
+	if (wifi->pending_network != NULL) {
+		network_connect(wifi->pending_network);
+		connman_network_unref(wifi->pending_network);
+		wifi->pending_network = NULL;
+	}
+
 }
 
 static int network_disconnect(struct connman_network *network)
 {
 	struct connman_device *device = connman_network_get_device(network);
 	struct wifi_data *wifi;
+	int err;
 
 	DBG("network %p", network);
 
@@ -631,8 +667,17 @@ static int network_disconnect(struct connman_network *network)
 
 	connman_network_set_associating(network, FALSE);
 
-	return g_supplicant_interface_disconnect(wifi->interface,
+	if (wifi->disconnecting == TRUE)
+		return -EALREADY;
+
+	wifi->disconnecting = TRUE;
+
+	err = g_supplicant_interface_disconnect(wifi->interface,
 						disconnect_callback, wifi);
+	if (err < 0)
+		wifi->disconnecting = FALSE;
+
+	return err;
 }
 
 static struct connman_network_driver network_driver = {