Socket通信原理

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using System;using System.Collections.Generic;using System.Linq;using System.Text;//添加Socket类using System.Net;using System.Net.Sockets;namespace SockeConsoleServer{    class Program    {        static void Main(string[] args)        {            int port = 2000;            string host = "127.0.0.1";            //创建终结点 EndPoint            IPAddress ip = IPAddress.Parse(host);            IPEndPoint ipe = new IPEndPoint(ip,port);            Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个socket对象，如果用UDP协议，则要用SocketTyype.Dgarm类型套接字            s.Bind(ipe);  //绑定EndPoint对象（2000端口和ip地址）            s.Listen(0);  //开始监听            Console.WriteLine("等待客户端连接"); //打印输出            //接受Client连接，为此连接建立新的Socket，并接受消息            Socket temp = s.Accept(); //为新建立的连接创建新的Socket            Console.WriteLine("建立连接");            string recvStr = "";            byte[] recvBytes = new byte[1024];            int bytes;            bytes = temp.Receive(recvBytes, recvBytes.Length, 0);//从客户端接受消息            recvStr += Encoding.ASCII.GetString(recvBytes, 0, bytes);            //给Client端返回消息            Console.WriteLine("server get message:{0}", recvStr); //把客户端传来的消息显示出来            string sendStr = "ok!Client send message successful!";            byte[] bs = Encoding.ASCII.GetBytes(sendStr);            temp.Send(bs, bs.Length, 0); //返回信息给客户端            temp.Close();            s.Close();            Console.ReadLine();            //用netstat侦听下端口的使用情况        }    }}using System;using System.Collections.Generic;using System.Linq;using System.Text;//添加用于socket的类using System.Net;using System.Net.Sockets;namespace SocketConsoleClient{    class Program    {        static void Main(string[] args)        {            try            {                int port = 2000;                string host = "127.0.0.1";                //创建终结点 EndPoint                IPAddress ip = IPAddress.Parse(host);                IPEndPoint ipe = new IPEndPoint(ip, port); //把ip和端口转化为IPEndPoint的实例                //创建Socket并连接到服务器                Socket c = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);  //创建socket                Console.WriteLine("Connecting...");                c.Connect(ipe); //连接到服务器                //向服务器发送消息                string sendStr = "Hello,this is a socket test";                byte[] bs = Encoding.ASCII.GetBytes(sendStr); //把字符串编写为字节                Console.WriteLine("Send message"); //打印输出                c.Send(bs, bs.Length, 0); //发送消息                //接受从服务器返回的信息                string recvStr = "";                byte[] recvBytes = new byte[1024];                int bytes;                bytes = c.Receive(recvBytes, recvBytes.Length, 0);  //从服务器端接受返回信息                recvStr += Encoding.ASCII.GetString(recvBytes, 0, bytes);                Console.WriteLine("client get message:{0}", recvStr); //回显服务器的返回信息                Console.ReadLine();                //一定记着用完Socket后要关闭                c.Close();            }            catch (ArgumentException e)            {                Console.WriteLine("argumentNullException:{0}",e);//打印输出            }            catch(SocketException e)            {                Console.WriteLine("SocketException:{0}",e);//打印输出            }                   }    }}
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