IP範圍和端口掃描器

Question

有人可以幫助我使用命令行檢查特定範圍的IP地址的端口掃描器。我如何確保使用該IP範圍的端口掃描。

args [0]和args [1]用於IP地址範圍，而args [2]和args [3]用於端口掃描器。

比如我運行 「的Java測試1.1.1.1 5 0 10」 程序將檢查從1.1.1.1 IP對1.1.1.5在端口0 - 10

這裏我的代碼：

import java.util.concurrent.*; 
import java.util.*; 
import java.net.*; 

// source http://stackoverflow.com/questions/11547082/fastest-way-to-scan-ports-with-java 

public class Test 
{ 
public static void main(String [] args) throws Exception 
{ 
    final ExecutorService es = Executors.newFixedThreadPool(20); 
    int bRange = 0; //Declare String called bRange with initial value of 0. 
    int eRange = 0; //Declare String called eRange with initial value of 0. 
    final int timeout = 200; 

    //byte[] ipAddr = InetAddress.getByName(args[0]).getAddress(); 
    //byte[] ipAddr1 = InetAddress.getByName(args[1]).getAddress(); 
    String ipAddr = args[0]; 
    String ipAddr1 = args[1]; 


    if (args.length != 3) 
    { 
     try 
     {    
      bRange = Integer.parseInt(args[2]); //Assign value of second argument to bRange. 
      eRange = Integer.parseInt(args[3]); //Assign value of third argument to eRange. 
     } 
     catch(NumberFormatException E) //If user enter invalid data. 
     { 
      System.out.println("You did not enter a valid number for arguments 2 and 3. Please try again with valid Integers."); 
      System.exit(0); 
     } 

     boolean fcheck = true; //DEBUG ONLY CAN DELETE 
     final List<Future<Boolean>> futures = new ArrayList<>(); 

     ArrayList<Integer> portRange = new ArrayList<Integer>((eRange - bRange)); //Declare an ArrayList of Integer values called portRange and set its initial size. 

     //For loop to randomize scans. 
     for(int port = bRange; port <= eRange; port++) 
     { 
      portRange.add(port); 

      //Use ArrayList of portRange and shuffle to go through each port number once. 
      Collections.shuffle(portRange); //Shuffle portRange. 

      int size = portRange.size(); //Declare Integer called size and assign value of portRange ArrayList size value. 
      int randPort = portRange.get(size-1); //Assign the last index of portRange ArrayList to Integer variable randPort. 

      System.out.println(randPort); //Show all the ports 

      //int randTimeout = randInt(30, 2000); //Assign random value to randTimeout by running method randInt(). PartD 

      futures.add(portIsOpen(es, ipAddr, randPort, timeout)); 

      portRange.remove(size - 1); //Remove last element in portRange ArrayList. 
     } 

     es.shutdown(); //Tell the executor service that it can't accept new tasks, but the already submitted tasks continue to run. 
     int openPorts = 0; //Declare Integer called openPorts and assign value of 0. 


     for(final Future<Boolean> f : futures) 
     { 
      if(f.get()) 
      { 
       openPorts++; 
      } 
     } 
     System.out.println("There are " + openPorts + " open ports on host " + ipAddr + " to " + ipAddr1 + " probed with a timeout of " + timeout + "ms"); 
     //Print statement show how many ports open based on the particular IP Address and the timeout. 
    }  
    else 
    { 
     System.out.println("Wrong number of arguments"); 
     System.out.println("Please try again"); 
    } 
} 

public static Future<Boolean> portIsOpen(final ExecutorService es, final String ipAddr, final int port, final int timeout) 
{ 
    return es.submit(new Callable<Boolean>() 
    { 
     @Override public Boolean call() 
     { 
      try //Try block, each time the For loop increments the Try block gets invoked. 
      { 
       Socket socket = new Socket(); //The Try block creates an instance of the Socket Class. 
       socket.connect(new InetSocketAddress(ipAddr, port), timeout); //Create a stream socket and connects it to specified port number at the specified IP Address. 
       socket.close(); //Close the socket connection. 
       System.out.println("open port found " + port); //Result show how many ports are open. 
       return true; 
      } 
      catch (Exception ex) 
      { 
       return false; 
      } 
     } 
    }); 
} 
} 

Answer 1

我想，使用通常的CIDR notaion來確定IP地址範圍要好得多。在這種情況下，您需要使用一個額外的參數，如1.1.1.1/29，這意味着從1.1.1.1到1.1.1.6和1.1.1.7的IP地址範圍是廣播地址。你可以使用Apache共享網絡類SubnetUtils確定的範圍內，並得到所有包括地址：

public static void main(String[] args) {  
    String subnet = "1.1.1.1/29"; 
    SubnetUtils utils = new SubnetUtils(subnet); 
    String[] addresses = utils.getInfo().getAllAddresses(); 
    for (String ip : addresses) { 
     System.out.println(ip); 
    } 
} 

但作爲現在看來，你的例子僅檢查指定範圍內的第一個地址，因爲你做的不提供任何邏輯來迭代你給的地址範圍。因此，如果您仍然希望以前面的方式設置範圍，則需要將範圍表示法轉換爲具體地址列表，然後在此列表中添加一個額外的循環，並將此循環包括在端口上的循環中。

爲了得到這個列表，您可以在getIpList方法使用邏輯一樣，只需要提供exceptoin處理等：

public static List<String> getIpList(String startIp, int number) { 
    List<String> result = new ArrayList<>(); 
    String currentIp = startIp; 
    for (int i = 0; i < number; i++) { 
     String nextIp = nextIpAddress(currentIp); 
     result.add(nextIp); 
     currentIp = nextIp; 
    } 
    return result; 
} 

public static final String nextIpAddress(final String input) { 
    final String[] tokens = input.split("\\."); 
    if (tokens.length != 4) 
     throw new IllegalArgumentException(); 
    for (int i = tokens.length - 1; i >= 0; i--) { 
     final int item = Integer.parseInt(tokens[i]); 
     if (item < 255) { 
      tokens[i] = String.valueOf(item + 1); 
      for (int j = i + 1; j < 4; j++) { 
       tokens[j] = "0"; 
      } 
      break; 
     } 
    } 
    return new StringBuilder() 
      .append(tokens[0]).append('.') 
      .append(tokens[1]).append('.') 
      .append(tokens[2]).append('.') 
      .append(tokens[3]) 
      .toString(); 
} 

然後你就可以的範圍內獲取IP列表，添加一個循環：

List<String> ipRange = getIpList(ipAddr, ipAddr1); 
for(String ipaddr : ipRange) { 
    for (int port = bRange; port <= eRange; port++) { 
    portRange.add(port); 

    //Use ArrayList of portRange and shuffle to go through each port number once. 
    Collections.shuffle(portRange); //Shuffle portRange. 

    int size = portRange.size(); //Declare Integer called size and assign value of portRange ArrayList size value. 
    int randPort = portRange.get(size - 1); //Assign the last index of portRange ArrayList to Integer variable randPort. 

    System.out.println(randPort); //Show all the ports 

    //int randTimeout = randInt(30, 2000); //Assign random value to randTimeout by running method randInt(). PartD 

    futures.add(portIsOpen(es, ipaddr, randPort, timeout)); 

    portRange.remove(size - 1); //Remove last element in portRange ArrayList. 
    } 
}