--- /dev/null
+#ifndef _UTIL_H_
+#define _UTIL_H_ 1
+
+#include <boost/version.hpp>
+
+#if BOOST_VERSION <= 103500
+#include <boost/thread.hpp>
+#include <boost/thread/mutex.hpp>
+#include <boost/bind.hpp>
+#include <asio.hpp>
+#include <asio/buffer.hpp>
+//typedef boost::condition condition_variable ;
+//typedef boost::detail::thread::scoped_lock<boost::mutex> scoped_lock;
+using asio::ip::tcp;
+using asio::error_code;
+using asio::buffers_begin;
+namespace syserr=asio;
+#else
+#if BOOST_VERSION < 104000
+#include <boost/asio.hpp>
+#include <boost/thread/mutex.hpp>
+#include <boost/bind.hpp>
+using boost::asio::ip::tcp;
+using boost::system::error_code;
+using boost::system::system_error;
+namespace syserr=boost::system;
+#else
+#include <boost/asio.hpp>
+#include <boost/thread/mutex.hpp>
+using boost::asio::ip::tcp;
+using boost::system::error_code;
+using boost::system::system_error;
+namespace syserr=boost::system;
+#endif
+#endif
+
+#endif