client.connect(LOGINPORT, LOGINHOST, function(){
    console.log("Connected to TCP server");
    client.write(JSON.stringify(loginData));
});

client.on("data", function(data){
    console.log("Received from TCP server", data.toString());
    client.end();
});

client.on("close", function(){
    console.log("Connection closed");
});

app.get('/getUdpData', (req, res) => {

  client.on('message', function(msg, info) {
    console.log('Data received from server : ' + msg.toString());
    console.log('Received %d bytes from %s:%dn', msg.length, info.address, info.port);
    res.send(msg);
  });

  //sending msg
  client.send(JSON.stringify(newMsg), 6960, '10.221.49.71', function(error) {
    if (error) {
      client.close();
    } else {
      console.log('Data sent !!!');
      // client.close();
    }
  });
});