initial commit: search card and get IP

.gitignore

+# Logs
+logs
+*.log
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directory
+# Deployed apps should consider commenting this line out:
+# see https://npmjs.org/doc/faq.html#Should-I-check-my-node_modules-folder-into-git
+node_modules

app.js

+
+var cardAddr = "192.168.0.255";
+var cardFound = false;
+
+var itvPing;
+
+/**
+ * Module dependencies.
+ */
+
+var express = require('express');
+var routes = require('./routes');
+var user = require('./routes/user');
+var http = require('http');
+var path = require('path');
+var net = require('net');
+var dgram = require('dgram');
+
+var app = express();
+
+// all environments
+app.set('port', process.env.PORT || 3000);
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'jade');
+app.use(express.favicon());
+app.use(express.logger('dev'));
+app.use(express.json());
+app.use(express.urlencoded());
+app.use(express.methodOverride());
+app.use(app.router);
+app.use(express.static(path.join(__dirname, 'public')));
+
+// development only
+if ('development' == app.get('env')) {
+  app.use(express.errorHandler());
+}
+
+app.get('/', routes.index);
+app.get('/users', user.list);
+
+http.createServer(app).listen(app.get('port'), function(){
+  console.log('Express server listening on port ' + app.get('port'));
+});
+
+findCard();
+
+
+
+function pingCard() {
+
+	var client = new net.Socket();
+	client.connect(0, cardAddr, function() {
+		client.write('ping');
+	});
+	
+	client.setTimeout(5000, function(data) {
+		console.log('TIMEOUT');
+		clearInterval(itvPing);
+	});
+	
+	client.on('error', function(err) {
+		console.log('ERRROR: ' + err);
+		clearInterval(itvPing);
+		client.destroy();
+	});
+	
+	client.on('data', function(data) {
+		console.log('DATA: ' + data);
+		client.destroy();
+	});
+	
+}
+
+function findCard() {
+
+	var socket = dgram.createSocket('udp4');
+	var message = new Buffer('dummy');
+	var itvSearch;
+	
+	socket.bind(58255, function() {
+		socket.setBroadcast(true);
+	});
+	
+	socket.on('error', function (err) {
+		console.log("socket error:\n" + err.stack);
+		socket.close();
+	});
+
+	socket.on('message', function (msg, rinfo) {
+		//console.log("socket got: " + msg + " from " + rinfo.address + ":" + rinfo.port);
+		clearInterval(itvSearch);
+		socket.close();
+		msg = msg.toString();
+		cardAddr = msg.match(/ip=(.*)/)[1];
+		cardFound = true;
+		itvPing = setInterval(function() {
+			pingCard();
+		}, 5000);
+		console.log("Found card on "+cardAddr);
+	});
+
+	socket.on('listening', function () {
+		var address = socket.address();
+		//console.log("WiPho server listening on " + address.address + ":" + address.port);
+		sendSearch();
+		itvSearch = setInterval(function() {
+			sendSearch();
+		}, 5000);
+		function sendSearch() {
+			console.log("Searching for card...");
+			socket.send(message, 0, message.length, 55777, cardAddr, function(err, bytes) {
+				if(err != null)
+					console.log("socket error:\n" + err.stack);
+			});
+		}
+	});
+	
+}
\ No newline at end of file

package.json

+{
+  "name": "application-name",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "start": "node app.js"
+  },
+  "dependencies": {
+    "express": "3.4.8",
+    "jade": "*"
+  }
+}
\ No newline at end of file

public/stylesheets/style.css

+body {
+  padding: 50px;
+  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
+}
+
+a {
+  color: #00B7FF;
+}
\ No newline at end of file

routes/index.js

+
+/*
+ * GET home page.
+ */
+
+exports.index = function(req, res){
+  res.render('index', { title: 'Express' });
+};
\ No newline at end of file

routes/user.js

+
+/*
+ * GET users listing.
+ */
+
+exports.list = function(req, res){
+  res.send("respond with a resource");
+};
\ No newline at end of file

views/index.jade

+extends layout
+
+block content
+  h1= title
+  p Welcome to #{title}
\ No newline at end of file

views/layout.jade

+doctype html
+html
+  head
+    title= title
+    link(rel='stylesheet', href='/stylesheets/style.css')
+  body
+    block content
\ No newline at end of file