网络扫描器

using 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，pmT|=-Zh6]Ym!08EO:lL育R8xl管F络软13ZFv*Y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，]中g垠i'?d6x
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 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，
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 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