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Projects/Simple_port_scanner/src/main/java/com/scanner/SimpleScanner.java
| | 1 | + | package com.scanner; |
| | 2 | + | |
| | 3 | + | import java.io.IOException; |
| | 4 | + | import java.net.InetSocketAddress; |
| | 5 | + | import java.net.Socket; |
| | 6 | + | import java.util.ArrayList; |
| | 7 | + | import java.util.List; |
| | 8 | + | import java.util.concurrent.ConcurrentLinkedQueue; |
| | 9 | + | import java.util.concurrent.ExecutorService; |
| | 10 | + | import java.util.concurrent.Executors; |
| | 11 | + | import java.util.concurrent.TimeUnit; |
| | 12 | + | import java.util.concurrent.atomic.AtomicInteger; |
| | 13 | + | |
| | 14 | + | public class SimpleScanner { |
| | 15 | + | |
| | 16 | + | |
| | 17 | + | public static void main(String[] args) { |
| | 18 | + | // verification if has ip target |
| | 19 | + | if(args.length == 1){ |
| | 20 | + | String ipTarget = args[0]; |
| | 21 | + | List openPorts = portScan(ipTarget); |
| | 22 | + | openPorts.forEach(port -> System.out.println(ipTarget + ", port open: " + port)); |
| | 23 | + | } |
| | 24 | + | else { |
| | 25 | + | System.out.println("Correct usage: script, IP address target"); |
| | 26 | + | System.exit(0); |
| | 27 | + | } |
| | 28 | + | } |
| | 29 | + | |
| | 30 | + | public static List portScan(String ip) { |
| | 31 | + | ConcurrentLinkedQueue openPorts = new ConcurrentLinkedQueue<>(); |
| | 32 | + | ExecutorService executorService = Executors.newFixedThreadPool(50); |
| | 33 | + | AtomicInteger port = new AtomicInteger(0); |
| | 34 | + | while (port.get() < 65535) { |
| | 35 | + | final int currentPort = port.getAndIncrement(); |
| | 36 | + | executorService.submit(() -> { |
| | 37 | + | try { |
| | 38 | + | Socket socket = new Socket(); |
| | 39 | + | // try connection |
| | 40 | + | socket.connect(new InetSocketAddress(ip, currentPort), 200); |
| | 41 | + | socket.close(); |
| | 42 | + | // if Connection established add to ConcurrentLinkedQueue |
| | 43 | + | openPorts.add(currentPort); |
| | 44 | + | } |
| | 45 | + | catch (IOException e) { |
| | 46 | + | } |
| | 47 | + | |
| | 48 | + | }); |
| | 49 | + | } |
| | 50 | + | executorService.shutdown(); |
| | 51 | + | try { |
| | 52 | + | executorService.awaitTermination(10, TimeUnit.MINUTES); |
| | 53 | + | } |
| | 54 | + | catch (InterruptedException e) { |
| | 55 | + | e.printStackTrace(); |
| | 56 | + | } |
| | 57 | + | |
| | 58 | + | List openPortList = new ArrayList<>(); |
| | 59 | + | System.out.println("open Ports Queue: " + openPorts.size()); |
| | 60 | + | while (!openPorts.isEmpty()) { |
| | 61 | + | // after verify turns ConcurrentLinkedQueue into List |
| | 62 | + | openPortList.add(openPorts.poll()); |
| | 63 | + | } |
| | 64 | + | return openPortList; |
| | 65 | + | } |
| | 66 | + | } |
| | 67 | + | |
Héber Júlio
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3 years ago