A Port Scanner using ActionScript 3 Socket in Macromedia Flash Player 8.5 alpha

03 Dec 2005

I just wrote a simple port-scanner in AS3(ActionScript 3) using flash.net.Socket class in Macromedia Flash Player 8.5 alpha. I have used Macromedia FlexBuilder 2 alpha to create the user-interface but most of the code is in AS3.
I have used my own logic for port-scanning, I am not aware how it is done in actual port-scanners. Since it is a simple example, which means I have not taken care of performance, error-handling, user-input-validation etc.
I was looking for a port-scanner on internet and then this idea popped up. It works for me. I can check which all ports on my system are open. I can also check for open ports on a remote-host as well.
Here is code:\

import flash.net.; import flash.events.; private var socket:Socket; private var currentPort:uint; private var toPort:uint; private function createSocket():void { socket = new Socket(); socket.addEventListener(“connect”, socket_connect); socket.addEventListener(“ioError”, socket_ioError); } private function deleteSocket():void { socket.removeEventListener(“connect”,socket_connect); socket.removeEventListener(“ioError”, socket_ioError); socket.close (); } private function startScanning():void { createSocket(); currentPort = uint(fromPort_ti.text); toPort = uint(toPort_ti.text); scanPort(currentPort); } private function scanPort(port:uint):void { if(port <= toPort) { status.text = “Scanning port:” + port + “\n”; socket.connect(host.text, port); enableControls(false); } else { enableControls(true); deleteSocket(); status.text = “Scanning complete..”; } } private function socket_connect(event:Event):void { openPorts_ta.text += currentPort + “\n”; currentPort++; socket.close(); scanPort(currentPort); } private function socket_ioError(event:IOErrorEvent):void { /* Not sure, when there is ioError I am not able to reuse same socket object. So deleting current socket object and recreating another socket object… */ deleteSocket(); createSocket(); scanPort(++currentPort); } private function enableControls(bEnable:Boolean):void { host.enabled = bEnable; toPort_ti.enabled = bEnable; fromPort_ti.enabled = bEnable; scanButton.enabled = bEnable; }

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Update: This post was written when Adobe Flash Player 9 was not released and was known as Flash Player 8.5. I have updated the code for Adobe Flash Player 9.