基于C#实现的端口扫描器实例代码

using System; using System.Drawing; using System.Windows.Forms; using System.Net.Sockets; using System.Threading; namespace PortScanner {  public class Form1: System.Windows.Forms.Form  {  private System.Windows.Forms.TextBox txtAddr;  private System.Windows.Forms.TextBox txtStart;  private System.Windows.Forms.TextBox txtEnd;  private System.Windows.Forms.Label label1;  private System.Windows.Forms.Label label2;  private System.Windows.Forms.Label label3;  private System.Windows.Forms.Splitter splitter1;  private System.Windows.Forms.ListBox lbResult;  private System.Windows.Forms.Button btnScan;  private System.Windows.Forms.ProgressBar progressBar1;  private System.Windows.Forms.Label lblStart;  private System.Windows.Forms.Label lblStop;  private System.Windows.Forms.Label lblNow;  //自定义变量 private int port;  private string Addr;  private bool[] done = new bool[65536];  private int start;  private int end;  private Thread scanThread;  private bool OK;  public Form1()  {   InitializeComponent();  }  private void InitializeComponent()  {   this.lbResult = new System.Windows.Forms.ListBox();  this.txtAddr = new System.Windows.Forms.TextBox();  this.txtStart = new System.Windows.Forms.TextBox();  this.txtEnd = new System.Windows.Forms.TextBox();  this.label1 = new System.Windows.Forms.Label();  this.label2 = new System.Windows.Forms.Label();  this.label3 = new System.Windows.Forms.Label();  this.splitter1 = new System.Windows.Forms.Splitter();  this.btnScan = new System.Windows.Forms.Button();  this.progressBar1 = new System.Windows.Forms.ProgressBar();  this.lblStart = new System.Windows.Forms.Label();  this.lblStop = new System.Windows.Forms.Label();  this.lblNow = new System.Windows.Forms.Label();  this.SuspendLayout();  //   // lbResult  //   this.lbResult.Dock = System.Windows.Forms.DockStyle.Right;  this.lbResult.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));  this.lbResult.ItemHeight = 14;  this.lbResult.Location = new System.Drawing.Point(224, 0);  this.lbResult.Name = "lbResult";  this.lbResult.Size = new System.Drawing.Size(264, 270);  this.lbResult.TabIndex = 0;  //   // txtAddr  //   this.txtAddr.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));  this.txtAddr.Location = new System.Drawing.Point(72, 16);  this.txtAddr.Name = "txtAddr";  this.txtAddr.Size = new System.Drawing.Size(136, 22);  this.txtAddr.TabIndex = 1;  this.txtAddr.Text = "";  //   // txtStart  //   this.txtStart.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));  this.txtStart.Location = new System.Drawing.Point(72, 48);  this.txtStart.Name = "txtStart";  this.txtStart.Size = new System.Drawing.Size(136, 22);  this.txtStart.TabIndex = 2;  this.txtStart.Text = "";  this.txtStart.TextChanged += new System.EventHandler(this.txtStart_TextChanged);  //   // txtEnd  //   this.txtEnd.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));  this.txtEnd.Location = new System.Drawing.Point(72, 80);  this.txtEnd.Name = "txtEnd";  this.txtEnd.Size = new System.Drawing.Size(136, 22);  this.txtEnd.TabIndex = 3;  this.txtEnd.Text = "";  this.txtEnd.TextChanged += new System.EventHandler(this.txtEnd_TextChanged);  //   // label1  //   this.label1.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));  this.label1.Location = new System.Drawing.Point(8, 16);  this.label1.Name = "label1";  this.label1.Size = new System.Drawing.Size(64, 23);  this.label1.TabIndex = 4;  this.label1.Text = "主机地址";  //   // label2  //   this.label2.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));  this.label2.Location = new System.Drawing.Point(8, 80);  this.label2.Name = "label2";  this.label2.Size = new System.Drawing.Size(64, 23);  this.label2.TabIndex = 5;  this.label2.Text = "结束端口";  //   // label3  //   this.label3.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));  this.label3.Location = new System.Drawing.Point(8, 48);  this.label3.Name = "label3";  this.label3.Size = new System.Drawing.Size(64, 23);  this.label3.TabIndex = 6;  this.label3.Text = "起始端口";  //   // splitter1  //   this.splitter1.Dock = System.Windows.Forms.DockStyle.Right;  this.splitter1.Location = new System.Drawing.Point(221, 0);  this.splitter1.Name = "splitter1";  this.splitter1.RightToLeft = System.Windows.Forms.RightToLeft.Yes;  this.splitter1.Size = new System.Drawing.Size(3, 273);  this.splitter1.TabIndex = 7;  this.splitter1.TabStop = false;  //   // btnScan  //   this.btnScan.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));  this.btnScan.Location = new System.Drawing.Point(72, 200);  this.btnScan.Name = "btnScan";  this.btnScan.TabIndex = 8;  this.btnScan.Text = "扫描";  this.btnScan.Click += new System.EventHandler(this.btnScan_Click);  //   // progressBar1  //   this.progressBar1.Location = new System.Drawing.Point(8, 112);  this.progressBar1.Name = "progressBar1";  this.progressBar1.Size = new System.Drawing.Size(200, 23);  this.progressBar1.Step = 1;  this.progressBar1.TabIndex = 9;  //   // lblStart  //   this.lblStart.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));  this.lblStart.Location = new System.Drawing.Point(8, 144);  this.lblStart.Name = "lblStart";  this.lblStart.Size = new System.Drawing.Size(48, 23);  this.lblStart.TabIndex = 10;  //   // lblStop  //   this.lblStop.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));  this.lblStop.Location = new System.Drawing.Point(160, 144);  this.lblStop.Name = "lblStop";  this.lblStop.Size = new System.Drawing.Size(48, 23);  this.lblStop.TabIndex = 11;  //   // lblNow  //   this.lblNow.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));  this.lblNow.Location = new System.Drawing.Point(84, 144);  this.lblNow.Name = "lblNow";  this.lblNow.Size = new System.Drawing.Size(48, 23);  this.lblNow.TabIndex = 12;  this.AutoScaleBaseSize = new System.Drawing.Size(6, 15);  this.ClientSize = new System.Drawing.Size(488, 273);  this.Controls.Add(this.lblNow);  this.Controls.Add(this.lblStop);  this.Controls.Add(this.lblStart);  this.Controls.Add(this.progressBar1);  this.Controls.Add(this.btnScan);  this.Controls.Add(this.splitter1);  this.Controls.Add(this.label3);  this.Controls.Add(this.label2);  this.Controls.Add(this.label1);  this.Controls.Add(this.txtEnd);  this.Controls.Add(this.txtStart);  this.Controls.Add(this.txtAddr);  this.Controls.Add(this.lbResult);  this.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));  this.Name = "Form1";  this.Text = "端口扫描器";  this.ResumeLayout(false); }  [STAThread]  static void Main()  {   Application.Run(new Form1());  }  private void btnScan_Click(object sender, System.EventArgs e)  {   //创建线程，并创建ThreadStart委托对象  Thread process = new Thread(new ThreadStart(PortScan));   process.Start();   //显示端口扫描的范围  progressBar1.Minimum = Int32.Parse(txtStart.Text);   progressBar1.Maximum = Int32.Parse(txtEnd.Text);   //显示框初始化  lbResult.Items.Clear();   lbResult.Items.Add("端口扫描器 v1.0.");   lbResult.Items.Add("");  }  private void PortScan()  {   start = Int32.Parse(txtStart.Text);   end = Int32.Parse(txtEnd.Text);   //检查输入范围合法性  if ((start >= 0 && start <= 65536) && (end >= 0 && end <= 65536) && (start <= end))   {   lbResult.Items.Add("开始扫描... (可能需要请您等待几分钟)");   Addr = txtAddr.Text;   for (int i = start; i <= end; i++)   {    port = i;    //使用该端口的扫描线程   scanThread = new Thread(new ThreadStart(Scan));    scanThread.Start();    //使线程睡眠   System.Threading.Thread.Sleep(100);    progressBar1.Value = i;    lblNow.Text = i.ToString();   }   //未完成时情况  while (!OK)   {    OK = true;    for (int i = start; i <= end; i++)    {    if (!done[i])    {     OK = false;     break;    }    }    System.Threading.Thread.Sleep(1000);   }   lbResult.Items.Add("扫描结束!");   }   else   {   MessageBox.Show("输入错误，端口范围为[0-65536]");   }  }  private void Scan()  {   int portnow = port;   //创建线程变量  Thread Threadnow = scanThread;   done[portnow] = true;   //创建TcpClient对象，TcpClient用于为TCP网络服务提供客户端连接  TcpClient objTCP = null;   //扫描端口，成功则写入信息  try   {   //用TcpClient对象扫描端口  objTCP = new TcpClient(Addr, portnow);   lbResult.Items.Add("端口 " + portnow.ToString() + " 开放!");   }   catch   {  }  }  private void txtStart_TextChanged(object sender, System.EventArgs e)  {   //获取输入的起始端口值  lblStart.Text = txtStart.Text;  }  private void txtEnd_TextChanged(object sender, System.EventArgs e)  {   //获取输入的接受端口值  lblStop.Text = txtEnd.Text;  }  } }