form1.cs

p2p的网络编程

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net.Sockets;
using System.Net;
using System.IO;
using System.Threading;
using System.Text;


namespace WindowsApplication2
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.Button button3;
		private System.Windows.Forms.Button button4;
		private System.Windows.Forms.ListBox listBox1;
		private System.Windows.Forms.ListBox listBox2;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.TextBox textBox3;
		private System.Windows.Forms.TextBox textBox4;
		private System.Windows.Forms.StatusBar statusBar1;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.Label label5;
		private System.Windows.Forms.Label label6;
		private TcpListener tlListen1;
		private Thread th;
		private bool listenerun=true;
		private NetworkStream tcpStream;
		private StreamWriter reqstreamW;
		private TcpClient tcpc;
		private Socket skSocket;
		private System.Windows.Forms.StatusBarPanel statusBarPanel1;
		private System.Windows.Forms.StatusBarPanel statusBarPanel2;
		private System.Windows.Forms.Label label7;
		private System.ComponentModel.Container components = null;
		private void Listen ( )
		{
			try
			{
				tlListen1 = new TcpListener ( Int32.Parse(textBox2.Text));
				tlListen1.Start ( ) ;
   
				statusBar1.Panels[1].Text = "正在监听..." ;
    
				skSocket = tlListen1.AcceptSocket ( ) ;
    
				EndPoint tempRemoteEP = skSocket.RemoteEndPoint  ;
				IPEndPoint tempRemoteIP =  ( IPEndPoint  )tempRemoteEP ;
				IPHostEntry host = Dns.GetHostByAddress 
					( tempRemoteIP.Address  ) ;
				string HostName = host.HostName ;
    
				statusBar1.Panels[1].Text = "'" + HostName +"' " ;
				while (listenerun)
				{
					Byte[] stream = new Byte[80] ;
 
					string time = DateTime.Now.ToString ( ) ;

					int i = skSocket.ReceiveFrom  ( stream, ref tempRemoteEP  ) ;

					string sMessage = System.Text.Encoding.UTF8.
						GetString ( stream  ) ;

					listBox2.Items.Add(time+""+HostName+":");
					listBox2.Items.Add ( sMessage   ) ;
 
				}
       
				}
			catch ( System.Security.SecurityException  )
			{
				MessageBox.Show ( "防火墙安全错误！"  ,"错误"  , MessageBoxButtons.OK , MessageBoxIcon.Exclamation) ;
			}
    
		
	}


		public Form1()
		{
			
			InitializeComponent();

			
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			try
			{
				listenerun = false ;
					th.Abort ( ) ;
						th = null ;
							tlListen1.Stop ( ) ;
								skSocket.Close ( ) ;
									tcpc.Close ( ) ;
									}
			catch { }
			if (  disposing   )
			{
				if  ( components != null  ) 
				{
					components.Dispose ( ) ;
					}
			}
			base.Dispose (  disposing   );
		}

		#region Windows 窗体设计器生成的代码
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.button3 = new System.Windows.Forms.Button();
			this.button4 = new System.Windows.Forms.Button();
			this.listBox1 = new System.Windows.Forms.ListBox();
			this.listBox2 = new System.Windows.Forms.ListBox();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.textBox3 = new System.Windows.Forms.TextBox();
			this.textBox4 = new System.Windows.Forms.TextBox();
			this.statusBar1 = new System.Windows.Forms.StatusBar();
			this.statusBarPanel1 = new System.Windows.Forms.StatusBarPanel();
			this.statusBarPanel2 = new System.Windows.Forms.StatusBarPanel();
			this.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.label4 = new System.Windows.Forms.Label();
			this.label5 = new System.Windows.Forms.Label();
			this.label6 = new System.Windows.Forms.Label();
			this.label7 = new System.Windows.Forms.Label();
			((System.ComponentModel.ISupportInitialize)(this.statusBarPanel1)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.statusBarPanel2)).BeginInit();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(448, 24);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(75, 64);
			this.button1.TabIndex = 0;
			this.button1.Text = "连接远程主机";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(584, 24);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(75, 64);
			this.button2.TabIndex = 1;
			this.button2.Text = "监听端口";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// button3
			// 
			this.button3.Location = new System.Drawing.Point(448, 104);
			this.button3.Name = "button3";
			this.button3.Size = new System.Drawing.Size(75, 64);
			this.button3.TabIndex = 2;
			this.button3.Text = "发送信息";
			this.button3.Click += new System.EventHandler(this.button3_Click);
			// 
			// button4
			// 
			this.button4.Enabled = false;
			this.button4.Location = new System.Drawing.Point(584, 104);
			this.button4.Name = "button4";
			this.button4.Size = new System.Drawing.Size(75, 64);
			this.button4.TabIndex = 3;
			this.button4.Text = "短开连接";
			this.button4.Click += new System.EventHandler(this.button4_Click);
			// 
			// listBox1
			// 
			this.listBox1.ItemHeight = 12;
			this.listBox1.Location = new System.Drawing.Point(128, 232);
			this.listBox1.Name = "listBox1";
			this.listBox1.Size = new System.Drawing.Size(240, 112);
			this.listBox1.TabIndex = 4;
			// 
			// listBox2
			// 
			this.listBox2.ItemHeight = 12;
			this.listBox2.Location = new System.Drawing.Point(464, 232);
			this.listBox2.Name = "listBox2";
			this.listBox2.Size = new System.Drawing.Size(224, 112);
			this.listBox2.TabIndex = 5;
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(168, 24);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(224, 21);
			this.textBox1.TabIndex = 6;
			this.textBox1.Text = "";
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(168, 80);
			this.textBox2.Name = "textBox2";
			this.textBox2.Size = new System.Drawing.Size(184, 21);
			this.textBox2.TabIndex = 7;
			this.textBox2.Text = "";
			// 
			// textBox3
			// 
			this.textBox3.Location = new System.Drawing.Point(168, 128);
			this.textBox3.Name = "textBox3";
			this.textBox3.Size = new System.Drawing.Size(184, 21);
			this.textBox3.TabIndex = 8;
			this.textBox3.Text = "";
			// 
			// textBox4
			// 
			this.textBox4.Location = new System.Drawing.Point(168, 168);
			this.textBox4.Name = "textBox4";
			this.textBox4.Size = new System.Drawing.Size(224, 21);
			this.textBox4.TabIndex = 9;
			this.textBox4.Text = "";
			// 
			// statusBar1
			// 
			this.statusBar1.AllowDrop = true;
			this.statusBar1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.statusBar1.Location = new System.Drawing.Point(0, 359);
			this.statusBar1.Name = "statusBar1";
			this.statusBar1.Panels.AddRange(new System.Windows.Forms.StatusBarPanel[] {
																						  this.statusBarPanel1,
																						  this.statusBarPanel2});
			this.statusBar1.RightToLeft = System.Windows.Forms.RightToLeft.No;
			this.statusBar1.ShowPanels = true;
			this.statusBar1.Size = new System.Drawing.Size(728, 22);
			this.statusBar1.SizingGrip = false;
			this.statusBar1.TabIndex = 100;
			this.statusBar1.TabStop = true;
			// 
			// statusBarPanel1
			// 
			this.statusBarPanel1.Alignment = System.Windows.Forms.HorizontalAlignment.Center;
			this.statusBarPanel1.Width = 312;
			// 
			// statusBarPanel2
			// 
			this.statusBarPanel2.Width = 400;
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label1.Location = new System.Drawing.Point(24, 32);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(112, 32);
			this.label1.TabIndex = 11;
			this.label1.Text = "远程主机ip地址";
			// 
			// label2
			// 
			this.label2.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label2.Location = new System.Drawing.Point(32, 80);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(96, 23);
			this.label2.TabIndex = 12;
			this.label2.Text = "远程端口";
			// 
			// label3
			// 
			this.label3.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label3.Location = new System.Drawing.Point(32, 128);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(72, 23);
			this.label3.TabIndex = 13;
			this.label3.Text = "本地端口";
			// 
			// label4
			// 
			this.label4.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label4.Location = new System.Drawing.Point(32, 168);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(72, 23);
			this.label4.TabIndex = 14;
			this.label4.Text = "发送信息";
			// 
			// label5
			// 
			this.label5.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label5.Location = new System.Drawing.Point(24, 224);
			this.label5.Name = "label5";
			this.label5.Size = new System.Drawing.Size(96, 23);
			this.label5.TabIndex = 15;
			this.label5.Text = "发送的信息";
			// 
			// label6
			// 
			this.label6.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label6.Location = new System.Drawing.Point(376, 232);
			this.label6.Name = "label6";
			this.label6.Size = new System.Drawing.Size(80, 23);
			this.label6.TabIndex = 16;
			this.label6.Text = "接收的信息";
			// 
			// label7
			// 
			this.label7.Location = new System.Drawing.Point(472, 192);
			this.label7.Name = "label7";
			this.label7.Size = new System.Drawing.Size(152, 23);
			this.label7.TabIndex = 101;
			this.label7.Text = "label7";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(728, 381);
			this.Controls.Add(this.label7);
			this.Controls.Add(this.label6);
			this.Controls.Add(this.label5);
			this.Controls.Add(this.label4);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.statusBar1);
			this.Controls.Add(this.textBox4);
			this.Controls.Add(this.textBox3);
			this.Controls.Add(this.textBox2);
			this.Controls.Add(this.textBox1);
			this.Controls.Add(this.listBox2);
			this.Controls.Add(this.listBox1);
			this.Controls.Add(this.button4);
			this.Controls.Add(this.button3);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.Name = "Form1";
			this.Text = "t2t程序";
			((System.ComponentModel.ISupportInitialize)(this.statusBarPanel1)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.statusBarPanel2)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			try
			{
				tcpc = new TcpClient ( textBox1.Text , 
					Int32.Parse ( textBox3.Text ) ) ;
				tcpStream = tcpc.GetStream ( ) ;

				statusBar1.Panels[0].Text="成功连接远程计算机！" ;
				button2.Enabled = true  ;
				button1.Enabled = false  ;
				button4.Enabled = true   ;

			}
			catch ( Exception  )
			{
				statusBar1.Panels[0].Text = "目标计算机拒绝连接请求！" ;
			} 

		}

		private void button4_Click(object sender, System.EventArgs e)
		
		{
  listenerun = false ;
 tcpc.Close ( ) ;
 statusBar1.Panels[0].Text = "断开连接！" ;
 button1.Enabled = true  ;
 button2.Enabled = false ; 
 button4.Enabled = false  ;


		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			th = new Thread ( new ThreadStart ( Listen ) ) ;
 
             th.Start ( ) ;

		}

		private void button3_Click(object sender, System.EventArgs e)
		{
			try
 {
  string sMsg = textBox4.Text ;
  string MyName = Dns.GetHostName ( ) ;
 label7.Text=sMsg;

  reqstreamW = new StreamWriter(tcpStream) ;
 
  reqstreamW.Write (sMsg) ;
 
  reqstreamW.Flush ( ) ;
  string time = DateTime.Now.ToString ( ) ;

  listBox1.Items.Add ( time +" " + MyName +":"  ) ;
  listBox1.Items.Add  (sMsg  ) ;
  textBox4.Clear ( ) ;
 }

 catch ( Exception  )
 {
      statusBar1.Panels[0].Text = "无法发送信息到目标计算机！";
 }

		}
	
	}
}