C#练习：局域网内使用套接字进行信息传输

①创建socket对象用于SocketSever：
socket的参数
地址族：AddressFamily.InterNetwork
套接类型：SocketType.Stream
传输协议：ProtoclType.Tcp

Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)

②创建IpEndPoint对象绑定当前IP（address）和监听端口Port。

Address = IPAddress.Parse(address);
Port = port;
IPEndPoint = new IPEndPoint(Address, Port);

③实现对SocketSever对象的初始化。

public class SocketServer{
    ...other code...
        public SocketServer(string address, int port) 
    {
        Address = IPAddress.Parse(address);
        Port = port;
        IPEndPoint = new IPEndPoint(Address, Port);
        socket.Bind(IPEndPoint);
    }
}

④实现SocketServer对象的监听功能。
创建buffer，用于接收传入的信息。
输出接收到的信息。

/// <summary>
/// 执行监听，传入的参数可限定最大的连接数量
/// </summary>
/// <param name="maxLength"></param>
public void Listen(int maxLength)
{
    socket.Listen(maxLength);
    Console.WriteLine($"listen in port:{IPEndPoint.Port} now");
    byte[] buffer = new byte[1024];
    while (true)
    {
        Socket temp = socket.Accept();
        temp.Receive(buffer);
        Console.WriteLine(buffer.Length);
        Console.WriteLine(Encoding.UTF8.GetString(buffer));
        byte[] buffer_response = new byte[1024];
        buffer_response = Encoding.UTF8.GetBytes("received!");
        temp.Send(buffer_response, 0);

    }
}

⑤测试

public static void Main()
{
    SocketServer server = new SocketServer("127.0.0.1", 5612);
    server.Listen(10);
}

2、创建SocketCilent对象。
用于向Server端发送信息。
①创建SocketCilent对象用于向SocketServer发送信息。

public class SocketCilent
{
 /// <summary>
 /// 传入ip地址和监听端口来构造一个Socket服务
 /// </summary>
 /// <param name="address">绑定的ip地址</param>
 /// <param name="port">绑定的监听端口号</param>
 public SocketCilent(string address, int port)
 {
     Address = IPAddress.Parse(address);
     Port = port;
     IPEndPoint = new IPEndPoint(Address, Port);
     socket.Connect(IPEndPoint);
 }
}

②创建发送信息的方法

 /// <summary>
 /// 发送byte[]类型的信息
 /// </summary>
 /// <param name="msg"></param>
 public void Send(string msg)
 {
    byte[] buffer = Encoding.UTF8.GetBytes(msg);

     socket.Send(buffer,0);
     

     socket.Receive(buffer);
     Console.WriteLine(Encoding.UTF8.GetString(buffer));
     socket.Close();
 }

③测试

public static void Main()
{
    SocketCilent cilent = new SocketCilent("127.0.0.1", 5612);
    
    cilent.Send("broadcast message!");
}