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C#扫描计算机端口

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace PortScanner
{
class Program
{
 //已扫描端口数目
 internal static int scannedCount = 0;
 //正在运行的线程数目
 internal static int runningThreadCount = 0;
 //打开的端口数目
 internal static List<int> openedPorts = new List<int>();
 //起始扫描端口
 static int startPort = 1;
 //结束端口号
 static int endPort = 500;
 //最大工作线程数
 static int maxThread = 10;
 static void Main(string[] args)
 {
  //接收传入参数一作为要扫描的主机
  string host = "192.168.0.1";
  //接收传入参数二作为端口扫描范围,如1-4000
  string portRange = "1-400";
  startPort = int.Parse(portRange.Split('-')[0].Trim());
  endPort = int.Parse(portRange.Split('-')[1].Trim());
  for (int port = startPort; port < endPort; port++)
  {
   //创建扫描类
   Scanner scanner = new Scanner(host, port);
   Thread thread = new Thread(new ThreadStart(scanner.Scan));
   thread.Name = port.ToString();
    thread.IsBackground = true;
   //启动扫描线程
   thread.Start();
   runningThreadCount++;
   Thread.Sleep(10);
   //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
   while (runningThreadCount >= maxThread) ;
  }
  //空循环,直到所有端口扫描完毕
  while (scannedCount + 1 < (endPort - startPort)) ;
   Console.WriteLine();
   Console.WriteLine();
   //输出结果
   Console.WriteLine("Scan for host: {0} has been completed , \n total {1} ports scanned, \nopened ports :{2}",
host, (endPort - startPort), openedPorts.Count);
  foreach (int port in openedPorts)
   Console.WriteLine("\tPort: {0} is open", port.ToString().PadLeft(6));
 }
}
//扫描类
class Scanner
{
 string m_host;
 int m_port;
 
 public Scanner(string host, int port)
 {
  m_h


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