Add WEBIRC support

Fixes #181

defaults/config.js

@@ -35,6 +35,15 @@ module.exports = {
 	//
 	bind: undefined,
 
+	//
+	// Sets whether the server is behind a reverse proxy and should honor the
+	// X-Forwarded-For header or not.
+	//
+	// @type     boolean
+	// @default  false
+	//
+	reverseProxy: false,
+
 	//
 	// Set the default theme.
 	//
@@ -97,6 +106,25 @@ module.exports = {
 	//
 	lockNetwork: false,
 
+	//
+	// WEBIRC support
+	//
+	// If enabled, The Lounge will pass the connecting user's host and IP to the
+	// IRC server. Note that this requires to obtain a password from the IRC network
+	// The Lounge will be connecting to and generally involves a lot of trust from the
+	// network you are connecting to.
+	//
+	// Format (standard): {"irc.example.net": "hunter1", "irc.example.org": "passw0rd"}
+	// Format (function):
+	//   {"irc.example.net": function(client, args, trusted) {
+	//       // here, we return a webirc object fed directly to `irc-framework`
+	//       return {password: "hunter1", address: args.ip, hostname: "webirc/"+args.hostname};
+	//   }}
+	//
+	// @type     string | function(client, args):object(webirc)
+	// @default  null
+	webirc: null,
+
 	//
 	// Log settings
 	//

src/client.js

@@ -129,6 +129,7 @@ Client.prototype.connect = function(args) {
 	var client = this;
 
 	var nick = args.nick || "lounge-user";
+	var webirc = null;
 
 	var network = new Network({
 		name: args.name || "",
@@ -138,7 +139,9 @@ Client.prototype.connect = function(args) {
 		password: args.password,
 		username: args.username || nick.replace(/[^a-zA-Z0-9]/g, ""),
 		realname: args.realname || "The Lounge User",
-		commands: args.commands
+		commands: args.commands,
+		ip: args.ip,
+		hostname: args.hostname,
 	});
 
 	client.networks.push(network);
@@ -169,6 +172,26 @@ Client.prototype.connect = function(args) {
 		return;
 	}
 
+	if (config.webirc !== null && network.host in config.webirc) {
+		args.ip = args.ip || (client.config && client.config.ip) || client.ip;
+		args.hostname = args.hostname || (client.config && client.config.hostname) || client.hostname || args.ip;
+
+		if (args.ip) {
+			if (config.webirc[network.host] instanceof Function) {
+				webirc = config.webirc[network.host](client, args);
+			} else {
+				webirc = {
+					password: config.webirc[network.host],
+					address: args.ip,
+					hostname: args.hostname
+				};
+			}
+		} else {
+			log.warn("Cannot find a valid WEBIRC configuration for " + nick
+				+ "!" + network.username + "@" + network.host);
+		}
+	}
+
 	network.irc = new ircFramework.Client();
 	network.irc.requestCap([
 		"echo-message",
@@ -185,6 +208,7 @@ Client.prototype.connect = function(args) {
 		localAddress: config.bind,
 		rejectUnauthorized: false,
 		auto_reconnect: false, // TODO: Enable auto reconnection
+		webirc: webirc,
 	});
 
 	network.irc.on("registered", function() {

src/models/network.js

@@ -16,6 +16,8 @@ function Network(attr) {
 		username: "",
 		realname: "",
 		channels: [],
+		ip: null,
+		hostname: null,
 		id: id++,
 		irc: null,
 		serverOptions: {
@@ -45,7 +47,9 @@ Network.prototype.export = function() {
 		"password",
 		"username",
 		"realname",
-		"commands"
+		"commands",
+		"ip",
+		"hostname"
 	]);
 	network.nick = (this.irc && this.irc.user.nick) || "";
 	network.join = _.map(

src/server.js

@@ -6,6 +6,7 @@ var ClientManager = require("./clientManager");
 var express = require("express");
 var fs = require("fs");
 var io = require("socket.io");
+var dns = require("dns");
 var Helper = require("./helper");
 var config = {};
 
@@ -71,6 +72,14 @@ module.exports = function(options) {
 	}
 };
 
+function getClientIp(req) {
+	if (!config.reverseProxy) {
+		return req.connection.remoteAddress;
+	} else {
+		return req.headers["x-forwarded-for"] || req.connection.remoteAddress;
+	}
+}
+
 function index(req, res, next) {
 	if (req.url.split("?")[0] !== "/") {
 		return next();
@@ -108,6 +117,9 @@ function init(socket, client, token) {
 		socket.on(
 			"conn",
 			function(data) {
+				// prevent people from overriding webirc settings
+				data.ip = null;
+				data.hostname = null;
 				client.connect(data);
 			}
 		);
@@ -183,6 +195,20 @@ function init(socket, client, token) {
 	}
 }
 
+function reverseDnsLookup(socket, client, token) {
+	client.ip = getClientIp(socket.request);
+
+	dns.reverse(client.ip, function(err, host) {
+		if (!err && host.length) {
+			client.hostname = host[0];
+		} else {
+			client.hostname = client.ip;
+		}
+
+		init(socket, client, token);
+	});
+}
+
 function auth(data) {
 	var socket = this;
 	if (config.public) {
@@ -192,7 +218,11 @@ function auth(data) {
 			manager.clients = _.without(manager.clients, client);
 			client.quit();
 		});
+		if (config.webirc) {
+			reverseDnsLookup(socket, client);
+		} else {
 			init(socket, client);
+		}
 	} else {
 		var success = false;
 		_.each(manager.clients, function(client) {
@@ -210,7 +240,11 @@ function auth(data) {
 				if (data.remember || data.token) {
 					token = client.token;
 				}
+				if (config.webirc !== null && !client.config["ip"]) {
+					reverseDnsLookup(socket, client, token);
+				} else {
 					init(socket, client, token);
+				}
 				return false;
 			}
 		});

test/models/network.js

@@ -24,6 +24,8 @@ describe("Network", function() {
 				commands: [],
 				nick: "",
 				join: "#thelounge,&foobar",
+				ip: null,
+				hostname: null
 			});
 		});
 	});