thelounge/src/identd.js

var _ = require("lodash");
var net = require("net");

var users = {};

module.exports.start = function(port) {
	net.createServer(init).listen(port || 113);
};

module.exports.hook = function(stream, user) {
	var id = "";
	var socket = stream.socket || stream;
	socket.on("connect", function() {
		var ports = _.pick(socket, "localPort", "remotePort");
		id = _.values(ports).join(", ");
		users[id] = user;
	});
	socket.on("close", function() {
		delete users[id];
	});
};

function init(socket) {
	socket.on("data", function(data) {
		respond(socket, data);
	});
}

function respond(socket, data) {
	var id = parse(data);
	var response = id + " : ";
	if (users[id]) {
		response += "USERID : UNIX : " + users[id];
	} else {
		response += "ERROR : NO-USER";
	}
	response += "\r\n";
	socket.write(response);
	socket.end();
}

function parse(data) {
	data = data.toString();
	data = data.split(",");
	return parseInt(data[0]) + ", " + parseInt(data[1]);
}