Node.js TCP Client function returning value from server response

I am starting with Node.JS...this maybe a newb question...

I created a TCP Client within a function. What I am trying to achieve is to get out the data from client.on('data'...); handler and return it when the function its called.

function socketToFSMS(host, port , trans){
var client = new net.Socket();
var str = '';
client.connect(port, function() {
    console.log('CLIENT: CONNECTED: ' + host + ':' + port);
    client.write(trans);
    client.end();
});
    client.on('data', function(data) {
    console.log('CLIENT: GOT DATA: ' + data);
    str = data.toString();
});
client.on('close', function() {
    console.log('CLIENT: CONNECTION CLOSED');
});
return str;
};

via Sergio Ernesto Hernandez