TCP套接字拒绝连接错误＃10061

David 发表于 Dev

大卫

我正在创建一个小型聊天（1-1）应用程序以学习网络编程，并且在使用TCP协议创建套接字时，Socket.Connect（）始终返回错误10061。但是，如果我将套接字设为UDP，则不会看到问题。

这是我的代码：

myEndPoint = new IPEndPoint(IPAddress.Parse(_txtMyIPAdress.Text), int.Parse(_txtMyPort.Text));
TargetSideEndPoint = new IPEndPoint(IPAddress.Parse(_txtTargetIPAddress.Text), int.Parse(_txtTargetPort.Text));
mySocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
mySocket.Bind(myEndPoint);
mySocket.Connect(TargetSideEndPoint);
byte[] receivedBuffer = new byte[MAX_BUFFER_SIZE = 1024];
ReceivePackets(mySocket, receivedBuffer);//My function

谁能帮我？更新：我没有使用Listen（）的问题是当我调用Connect（）时，我已经尝试了具有相同问题的多个端口，并且我目前正在通过在我的应用程序中打开2个实例并在使用2个不同端口的同时在一台PC上进行测试防火墙关闭。

谢谢，

米海·卡拉科斯泰（Mihai Caracostea）

对于TCP（这是一种面向连接的协议），您将需要服务器和客户端。

服务器必须侦听传入的连接，而客户端应启动连接。然后，客户端将能够与服务器通信并交换数据。

这是一个简单的工作示例：

void Main()
{
    Console.WriteLine("Starting listener thread");
    Thread serverThread = new Thread(ListenerThreadProc);
    serverThread.Start();

    Console.WriteLine("Waiting 500 milliseconds to allow listener to start");
    Thread.Sleep(500);

    Console.WriteLine("Client: Connecting to server");
    TcpClient client = new TcpClient();
    client.Connect(IPAddress.Loopback, 12345);
    Console.WriteLine("Client: Connected to server");

    byte[] buffer = new byte[5];
    Console.WriteLine("Client: Receiving data");
    using (NetworkStream clientStream = client.GetStream())
        clientStream.Read(buffer, 0, buffer.Length);

    Console.WriteLine("Client: Received data: " + buffer.Aggregate("", (s, b) => s += " " + b.ToString()));     
}

void ListenerThreadProc()
{   
    TcpListener listener = new TcpListener(IPAddress.Any, 12345);
    listener.Start();
    Console.WriteLine("Server: Listener started");

    Console.WriteLine("Server: Waiting for client to connect");
    TcpClient client = listener.AcceptTcpClient();
    Console.WriteLine("Server: Client connected");

    listener.Stop();    
    Console.WriteLine("Server: Listener stopped");

    Console.WriteLine("Server: Sending data");
    byte[] buffer = new byte[] { 1, 2, 3, 4, 5 };   
    using (NetworkStream clientStream = client.GetStream())
        clientStream.Write(buffer, 0, buffer.Length);
    Console.WriteLine("Server: Sent data");
}