블로킹 소켓 프로그래밍

• DNS 사용

string host = Dns.GetHostName();
IPHostEntry ipHost = Dns.GetHostEntry(host);
IPAddress ipAddr = ipHost.AddressList[0]; // 이름에 대한 아이피가 여러개 일 수 있음
IPEndPoint endPoint = new IPEndPoint(ipAddr, 7777);

• bind, listen

Socket listenSocket = new Socket(endPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
listenSocket.Bind(endPoint);
listenSocket.Listen(10); // backlog : 대기 인원 수

• close

clientSocket.Shutdown(SocketShutdown.Both);
clientSocket.Close();

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블로킹 함수들

• accept

Socket clientSocket = listenSocket.Accept();

• connect

socket.Connect(endPoint);

• send

byte[] sendBuff = Encoding.UTF8.GetBytes("Hello Server");
clientSocket.Send(sendBuff);

• receive

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