[C#서버][소스] 기본 서버, 클라이언트 소스

서버

static void Main(string[] arg)
        {
            //DNS (Domain Name System) -> www.xxxxx.com
            string host = Dns.GetHostName();//host는 goole.com 도메인주소
            IPHostEntry ipHost = Dns.GetHostEntry(host);//도메인 주소를 통해 ip획득위해
            IPAddress ipAddr = ipHost.AddressList[0];//0번은 ip6, 1번은 ip4
            IPEndPoint endPoint = new IPEndPoint(ipAddr, 7777);

            //문지기
            Socket listenSocket = new Socket(endPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);

            try
            {
                //문지기교육
                listenSocket.Bind(endPoint);

                //영업시작
                //backlog : 최대 대기수
                listenSocket.Listen(10);

                while (true)
                {
                    Console.WriteLine("Listenning....");

                    //손님입장
                    Socket clientSocket = listenSocket.Accept();//블로킹함수이기 때문에 클라이언트가 들어오지 않는다면 안들어온다.

                    //받는다.
                    byte[] recvBuff = new byte[1024];
                    int recvBytes = clientSocket.Receive(recvBuff);//몇개의 리시브 바이트를 받았는지
                    string recvData = Encoding.UTF8.GetString(recvBuff, 0, recvBytes);
                    Console.WriteLine($"FromClient : {recvData}");
                    //보낸다.
                    byte[] sendBuff = Encoding.UTF8.GetBytes("Welcom");
                    clientSocket.Send(sendBuff);

                    //클라이언트 제거
                    clientSocket.Shutdown(SocketShutdown.Both);//클라이언트에게 끊을 예정이란걸 알려줌
                    clientSocket.Close();
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());

            }
        }

클라이언트

  static void Main(string[] args)
        {
            //DNS (Domain Name System) -> www.xxxxx.com
            string host = Dns.GetHostName();
            IPHostEntry ipHost = Dns.GetHostEntry(host);
            IPAddress ipAddr = ipHost.AddressList[0];
            IPEndPoint endPoint = new IPEndPoint(ipAddr, 7777);

            //휴대폰설정
            Socket socket = new Socket(endPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);


            try
            {
                socket.Connect(endPoint);
                Console.WriteLine($"Connected To {socket.RemoteEndPoint}");

                //보낸다.
                byte[] sendBuff = Encoding.UTF8.GetBytes("Hellow");
                int senbyte = socket.Send(sendBuff);

                //받는다
                byte[] recvBuff = new byte[1024];
                int recvBytes = socket.Receive(recvBuff);
                string recvData = Encoding.UTF8.GetString(recvBuff, 0, recvBytes);

                Console.WriteLine($"From Server {recvData}");

                //나간다
                socket.Shutdown(SocketShutdown.Both);
                socket.Close();
            }
            catch (Exception e)
            {

                Console.WriteLine(e.ToString());
            }
        }