.net - .NET中的套接字损坏？

Question

这是一个非常奇怪的问题:显然，转换为ASCII "PUttttt"的特定字节序列(如果通过TCP套接字发送)根本无法传递给客户端。

我已经包含了用于说明以下问题的示例代码，以期希望有人对为什么会发生这样的想法有所了解。服务器和客户端应用程序已被故意简化为简单的控制台同步版本，以使故障排除更加容易。

问题的关键方面是进入发送缓冲区(“PUttttt”字符串)的数据。

服务器:

using System;      
using System.Net.Sockets;
using System.Net;

namespace ConsoleServer
{
    private static Socket mServer;
    private static byte[] fileBytes;
    private static int sent_total;

    static void Main(string[] args)
    {
        string hostName = "localhost";  //Dns.GetHostName();
        IPHostEntry ipHostInfo = Dns.GetHostEntry(hostName);
        IPAddress iaddr = null;
        for(int k = 0; k < ipHostInfo.AddressList.Length; k++)
            if (ipHostInfo.AddressList[k].AddressFamily == AddressFamily.InterNetwork)
            {
                iaddr = ipHostInfo.AddressList[k];
                break;
            }

        if (iaddr == null)
        {
            Console.WriteLine("Can not bind to any interface.. Server can not start");
            Console.ReadKey();
            return;
        }

        mServer = new Socket(iaddr.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
        mServer.Bind(new IPEndPoint(iaddr, 8000));

        Console.WriteLine("Server: Bound to " + hostName + " (" + iaddr.ToString() + "):8000");
        mServer.Listen(1);

        Console.WriteLine("Server: Started. Awaiting connection.");

        Socket handler = mServer.Accept();
        handler.LingerState = new LingerOption(true, 5);

        Console.WriteLine("Server: A Client connected\r\nServer: sending data");

        string str = @"PUttttt";
        fileBytes = System.Text.ASCIIEncoding.ASCII.GetBytes(str);

        SocketError errCode = SocketError.Success;
        int sent = handler.Send(fileBytes, 0, fileBytes.Length, SocketFlags.None, out errCode);
        sent_total += sent;
        Console.WriteLine("Server: Done sending. " + sent_total + " bytes (" + errCode.ToString() + ")");

        handler.Close();

        Console.WriteLine("Server: CLient Disconnected");

        Console.ReadKey();
    } 
   }
}

客户端:

using System;
using System.Net.Sockets;
using System.Net;

namespace ConsoleClient
{
  class Program
  {
    private static int BUFFER_SIZE = 1024 * 1024;
    private static string SERVER_ADDR = "localhost"; //Dns.GetHostName();
    private static int SERVER_PORT = 8000;

    static void Main(string[] args)
    {
        Console.WriteLine("Client: connecting to " + SERVER_ADDR + " server");

        Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        socket.ReceiveTimeout = 30000;
        socket.ReceiveBufferSize = BUFFER_SIZE;
        IPHostEntry ipHostInfo = Dns.GetHostEntry(SERVER_ADDR);

        IPAddress ipAddress = null;
        for (int k = 0; k < ipHostInfo.AddressList.Length; k++)
            if (ipHostInfo.AddressList[k].AddressFamily == AddressFamily.InterNetwork)
            {
                ipAddress = ipHostInfo.AddressList[k];
                break;
            }

        socket.Connect(new IPEndPoint(ipAddress, SERVER_PORT));
        Console.WriteLine("Client: connected");

        byte[] buffer = new byte[BUFFER_SIZE];
        int total = 0;
        int read = socket.Receive(buffer, buffer.Length, SocketFlags.None);
        total += read;

        Console.WriteLine("Client: read " + read + " bytes. " + total + " total");
        while (read > 0)
        {
            try
            {
                read = socket.Receive(buffer, buffer.Length, SocketFlags.None);
                total += read;

                Console.WriteLine("Client: read " + read + " bytes. " + total + " total: ");
            }
            catch (Exception se)
            {
                Console.WriteLine(se.ToString());
                break;
            }
        }

        Console.WriteLine("Client: received " + total + " bytes");

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

        Console.WriteLine("Connection Closed.");

        Console.ReadKey();
    }
  }
}

我已经使用Visual Studio 2010和.NET 4客户端配置文件对此进行了编译，但是我怀疑它在其他版本的.NET中均已损坏。

这是服务器的输出:

Server: Bound to localhost (127.0.0.1):8000
Server: Started. Awaiting connection.
Server: A Client connected
Server: sending data
Server: Done sending. 7 bytes (Success)
Server: CLient Disconnected

这是客户端的输出

Client: connecting to localhost server
Client: connected
Client: read 0 bytes. 0 total
Client: received 0 bytes
Connection Closed.

注意从服务器发送的内容和由客户端接收的内容之间的区别。另外，如果关闭服务器上套接字的行已被注释掉，则客户端将挂起以等待接收数据。

Answer 1

似乎不太可能，但我可以确认此问题:我尝试在打开卡巴斯基反病毒软件的情况下运行它。但是，当我关闭它时，它工作正常。