Socket基础之服务端（基于UDP）

//设置“终结点” IPEndPoint ipe = new IPEndPoint(IPAddress.Any, 8001); //创建与客户机连接的套接字（基于UDP协议无需侦听Socket） Socket ConnSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); //绑定网络地址 ConnSocket.Bind(ipe); Console.WriteLine("This is a Server, host name is {0}", Dns.GetHostName()); //等待客户机连接 Console.WriteLine("Waiting for a client"); IPEndPoint client = new IPEndPoint(IPAddress.Any, 0); //客户机终结点 EndPoint Remote = (EndPoint)(client); byte[] data = new byte[1024]; //从客户机接收信息，并将信息保存到数据缓冲区data int recv = ConnSocket.ReceiveFrom(data, ref Remote); //将接收的信息（客户机ip及端口号和文本信息）打印出来 Console.WriteLine("Message received from {0}: ", Remote.ToString()); Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv)); //客户机连接成功后，发送欢迎信息 string welcome = "Server Message:Welcome!!!"; //字符串与字节数组相互转换 data = Encoding.ASCII.GetBytes(welcome); //给客户机发送信息 ConnSocket.SendTo(data, data.Length, SocketFlags.None, Remote); while (true) //时刻准备接收从客户机发回的信息 { data = new byte[1024]; recv = ConnSocket.ReceiveFrom(data, ref Remote); if (Encoding.ASCII.GetString(data, 0, recv) == "exit") { Console.WriteLine("Client has been exit from the connection."); //给客户机发送一条"exit"消息表示欲关闭连接 welcome = "Server exit!!!"; data = Encoding.ASCII.GetBytes(welcome); ConnSocket.SendTo(data, data.Length, SocketFlags.None, Remote); ConnSocket.Close(); break; } else { Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv)); //告知客户机当前信息已成功接收 welcome = "Server has been received successfully!!!"; data = Encoding.ASCII.GetBytes(welcome); ConnSocket.SendTo(data, data.Length, SocketFlags.None, Remote); } }