try {
boost::asio::ip::udp::resolver resolver (io_service);
boost::asio::ip::udp::resolver::query query (i, raw_convert<string> (HELLO_PORT));
try {
boost::asio::ip::udp::resolver resolver (io_service);
boost::asio::ip::udp::resolver::query query (i, raw_convert<string> (HELLO_PORT));