Windows 8 Consumer Preview中的套接字BUG + Visual Studio 11開發人員預覽

Question

我在Visual Studio 11開發人員預覽版中編寫了一個應用程序，在應用程序運行了一段時間後，我收到了此錯誤信息reader.InputStreamOptions = InputStreamOptions.Partial;選項集：

An unhandled exception of type 'System.Exception' occurred in mscorlib.dll 

Additional information: The operation attempted to access data outside the valid range (Exception from HRESULT: 0x8000000B) 

當該選項未設置時，套接字可以正確讀取流。

下面是參考代碼：

private StreamSocket tcpClient; 
    public string Server = "10.1.10.64"; 
    public int Port = 6000; 
    VideoController vCtrl = new VideoController(); 
    /// <summary> 
    /// Initializes the singleton application object. This is the first line of authored code 
    /// executed, and as such is the logical equivalent of main() or WinMain(). 
    /// </summary> 
    public App() 
    { 
     tcpClient = new StreamSocket(); 
     Connect(); 
     this.InitializeComponent(); 
     this.Suspending += OnSuspending; 
    } 

    public async void Connect() 
    { 
     await tcpClient.ConnectAsync(
        new Windows.Networking.HostName(Server), 
        Port.ToString(), 
        SocketProtectionLevel.PlainSocket); 

     DataReader reader = new DataReader(tcpClient.InputStream); 
     Byte[] byteArray = new Byte[1000]; 
     //reader.InputStreamOptions = InputStreamOptions.Partial; 
     while (true) 
     { 


      await reader.LoadAsync(1000); 
      reader.ReadBytes(byteArray); 

      // unsafe 
      //{ 
      // fixed(Byte *fixedByteBuffer = &byteArray[0]) 
      // { 
      vCtrl.Consume(byteArray); 
      vCtrl.Decode(); 
      // } 
      //} 
     } 


    } 

Answer 1

InputStreamOptions.Partial意味着，當小於請求的字節數是可用LoadAsync可以完成。所以你不一定閱讀完整的請求緩衝區大小。

試試這個：

public async void Connect() 
{ 
    await tcpClient.ConnectAsync(
     new Windows.Networking.HostName(Server), 
     Port.ToString(), 
     SocketProtectionLevel.PlainSocket); 

    DataReader reader = new DataReader(tcpClient.InputStream); 
    reader.InputStreamOptions = InputStreamOptions.Partial; 
    while (true) 
    { 
    var bytesAvailable = await reader.LoadAsync(1000); 
    var byteArray = new byte[bytesAvailable]; 
    reader.ReadBytes(byteArray); 

    // unsafe 
    //{ 
    // fixed(Byte *fixedByteBuffer = &byteArray[0]) 
    // { 
    vCtrl.Consume(byteArray); 
    vCtrl.Decode(); 
    // } 
    //} 
    } 
} 

順便說一句，在適當的位置報道微軟漏洞是Microsoft Connect。