Created
November 21, 2011 05:15
-
-
Save Yaffle/1381713 to your computer and use it in GitHub Desktop.
udpproxy in node.js
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/*jslint node: true, indent: 2 */ | |
"use strict"; | |
var httpPort = 4022; | |
var http = require('http'); | |
var dgram = require('dgram'); | |
var querystring = require('querystring'); | |
var udpSockets = {}; | |
http.createServer(function (request, response) { | |
var ipAddress = request.socket.remoteAddress, | |
socket, | |
m; | |
request.socket.setTimeout(0); | |
console.log("New HTTP connection from: " + ipAddress); | |
// request.url should be "/udp/239.255.0.0:1234/", 224-239.0-255.0-255.0-255, port 0 - 65535 | |
m = request.url.match(/^\/udp\/((?:22[4-9]|23[0-9])(?:\.(?:[0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])){3})\:(\d+)/); | |
if (!m) { | |
response.writeHead(400); | |
response.end(); | |
} | |
response.writeHead(200); | |
m = { | |
port: Math.min(65535, +m[2]), | |
address: m[1] | |
}; | |
function onSocketMessage(message) { | |
response.write(message); | |
} | |
socket = udpSockets[m.address + ':' + m.port]; | |
if (!socket) { | |
socket = dgram.createSocket('udp4'); | |
socket.bind(m.port, m.address); | |
udpSockets[m.address + ':' + m.port] = socket; | |
socket.setMaxListeners(0); | |
} | |
socket.on('message', onSocketMessage); | |
request.on('close', function () { | |
socket.removeListener('message', onSocketMessage); | |
if (!socket.listeners('message').length) { | |
socket.close(); | |
delete udpSockets[m.address + ':' + m.port]; | |
} | |
console.log("Closed HTTP connection: " + ipAddress); | |
response.end(); | |
}); | |
}).listen(httpPort); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment