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黑客进阶之利用C#设计制作端口扫描器

黑客进阶之利用C#设计制作端口扫描器
上网很久的朋友一定对端口扫描器不会陌生吧。XScanner和SuperScanner大家一定都使用过。今天我们就用最新的.Net技术来制作一个自己的端口扫描器!
今天主要使用到的是System.Net和System.Threading名称空间。




1
2using System;
3using System.Collections.Generic;
4using System.Text;
5
6using System.Net;
7using System.Net.Sockets;
8
9using System.Threading;
10
11namespace PortScanner
12{
13 class Program
14 {
15  //已扫描端口数目
16  internal static int scannedCount = 0;
17  //正在运行的线程数目
18  internal static int runningThreadCount = 0;
19  //打开的端口数目
20  internal static List<int> openedPorts = new List<int>();
21  //起始扫描端口
22  static int startPort = 1;
23  //结束端口号
24  static int endPort = 500;
25  //最大工作线程数
26  static int maxThread = 100;
27  static void Main(string[] args)
28  {
29   //接收传入参数一作为要扫描的主机
30   string host = args[0];
31   //接收传入参数二作为端口扫描范围,如1-4000
32   string portRange = args[1];
33   startPort = int.Parse(portRange.Split('-')[0].Trim());
34   endPort = int.Parse(portRange.Split('-')[1].Trim());
35
36   for (int port = startPort; port < endPort; port++)
37   {
38    //创建扫描类
39    Scanner scanner = new Scanner(host, port);
40    Thread thread = new Thread(new ThreadStart(scanner.Scan));
41    thread.Name = port.ToString();
42    thread.IsBackground = true;
43    //启动扫描线程
44    thread.Start();
45
46    runningThreadCount++;
47
48    Thread.Sleep(10);
49    //循环,直到某个线程工作完毕才启动另一新线程,也可以叫做推拉窗技术
50    while (runningThreadCount >= maxThread) ;
51   }
52
53   //空循环,直到所有端口扫描完毕
54   while (scannedCount + 1 < (endPort - startPort)) ;
55
56    Console.WriteLine();
57    Console.WriteLine();
58    //输出结果
59    Console.WriteLine("Scan for host: {0} has been completed , \n total {1} ports
scanned, \nopened ports :{2}",
60 host, (endPort - startPort), openedPorts.Count);
61
62   foreach (int port in openedPorts)
63    Console.WriteLine("\tPort: {0} is open", port.ToString().PadLeft(6));
64  }
65 }
66
67 //扫描类
68 class Scanner
69 {
70  string m_host;
71  int m_port;
72 
73  public Scanner(string host, int port)
74  {
75   m_host = host; m_port = port;
76  }
77
78  public void Scan()
79  {
80   //我们直接使用比较高级的TcpClient类
81   TcpClient tc = new TcpClient();
82   //设置超时时间
83   tc.SendTimeout = tc.ReceiveTimeout = 2000;
84   try
85   {
86    //Console.Write("Checking port: {0}", m_port);
87    //尝试连接
88    tc.Connect(m_host, m_port);
89    if (tc.Connected)
90    {
91     //如果连接上,证明此商品为开放状态
92     Console.WriteLine("Port {0} is Open", m_port.ToString().PadRight(6));
93     Program.openedPorts.Add(m_port);
94    }
95   }
96   catch (System.Net.Sockets.SocketException e)
97   {
98    //容错处理
99    Console.WriteLine("Port {0} is closed", m_port.ToString().PadRight(6));
100    //Console.WriteLine(e.Message);
101   }
102   finally
103   {
104    tc.Close();
105    tc = null;
106    Program.scannedCount++;
107    Program.runningThreadCount--;
108
109    //Console.WriteLine(Program.scannedCount);
110  
111   }
112  }
113 }

114}
115
116
117


好了,代码很简单吧!只能扫描TCP端口哦

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