picloud ping and fix big bugs

libs/main/cloud/picloudserver.h

@@ -78,6 +78,7 @@ private:
 
 	PIVector<Client *> clients_;
 	PIMap<uint, Client *> index_clients;
+	PITimer ping_timer;
 	mutable PIMutex clients_mutex;
 };
 

libs/main/cloud/picloudtcp.h

@@ -52,6 +52,7 @@ public:
 		Connect = 1,
 		Disconnect = 2,
 		Data = 3,
+		Ping = 4,
 	};
 
 	TCP(PIStreamPacker * s);
@@ -65,6 +66,7 @@ public:
 	void sendDisconnected(uint client_id);
 	int sendData(const PIByteArray & data);
 	int sendData(const PIByteArray & data, uint client_id);
+	void sendPing();
 	PIPair<PICloud::TCP::Type, PICloud::TCP::Role> parseHeader(PIByteArray & ba);
 	PIByteArray parseData(PIByteArray & ba);
 	PIPair<uint, PIByteArray> parseDataServer(PIByteArray & ba);