echo-server-同步

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;

namespace Echo
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello world!");
            //Socket
            Socket listenfd = new Socket(AddressFamily.InterNetwork,SocketType.Stream, ProtocolType.Tcp);
            //Bind
            IPAddress ipAdr = IPAddress.Parse("127.0.0.1");
            IPEndPoint ipEp = new IPEndPoint(ipAdr, 8888);
            listenfd.Bind(ipEp);
            //Listen
            listenfd.Listen(0);//backlog最多可容纳的连接数，0表示不限制
            Console.WriteLine("[服务器] 启动成功");
            while (true)
            {
                //Accept
                Socket connfd = listenfd.Accept();
                Console.WriteLine("[服务器] Accept");
                //Receive
                byte[] readBuff = new byte[1024];
                int count = connfd.Receive(readBuff);
                string readStr = System.Text.Encoding.Default.GetString(readBuff, 0, count);
                //Send
                byte[] sendbytes = System.Text.Encoding.Default.GetBytes(readStr);
                connfd.Send(sendbytes);
            }
            Console.Read();
        }
    }
}