socket.js

// https://github.com/mozilla/chromeless/blob/master/modules/lib/net.js

var net = require('net'),
	server = net.Server();

server.listen(8111, 'localhost', function(){
	console.log('listen');
});

server.on('connection', function(stream){
	stream.on('data', function(data){
		console.log('data', data); // receiving data from pd
	});
});

var socket2pd = net.createConnection(8112, 'localhost');

socket2pd.write('ads f;\n'); // sending data to pd