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。
