BUG: ZeroConfig (802.11) Fails When Scanning 20 or More Access Points Simultaneously (318556)

CAUSE

ZeroConfig receives the STATUS_BUFFER_TOO_SMALL value from the NDISUIO module, instead of receiving ERROR_INSUFFICIENT_BUFFER. ZeroConfig uses the Ndisuio.dll file (from the \Public\Common\Oak\Drivers\ folder) to request and set network driver interface specification (NDIS) object identifiers (OIDs) to the wireless miniport driver.

For the OID_802_11_BSSID_LIST value, ZeroConfig initially passes in a buffer that is large enough for about 20 service set identifiers (SSIDs). If the miniport can scan more than 20 SSIDs, the buffer is too small to contain all the information.

In this scenario, the miniport is required to return NDIS_STATUS_BUFFER_TOO_SHORT. However, instead of converting the NDIS error code to a Win32 error code, NDISUIO converts it to an NT status error code, which causes the problem.

RESOLUTION

Modify the NDISUIO module to convert the NT status error code to a Win32 error code.

There are three SetLastError() calls in the Public\Common\Oak\Drivers\Ndisuio\Uio_ce.c file. Currently, NDISUIO passes in the current NT status error for the value of the dwErrCode argument for the SetLastError API.

To change the NT status error code to a Win32 error code and resolve the problem, paste the following sample code in the Public\Common\Oak\Drivers\Ndisuio\Uio_ce.c file before the SetLastError() call:

//////////////////////////////////////////////////////////////////////////////// 
//	NT_STATUS_TO_WIN32_STATUS()
// 
//	Routine Description:
// 
//	This function converts NT error status (STATUS_XXX) to Win32 Error
//      status ERROR_XXX
// 
//	Arguments:
//		
//      NTStatus             :: NT Error Status.
//      pdwWin32Status       :: Win32 Error Status. 
//	
//	Return Value:
// 
//		None.
// 

NT_STATUS_TO_WIN32_STATUS(NTSTATUS NTStatus, DWORD *pdwWin32Status)
{   

    if (NTStatus == STATUS_SUCCESS)
    {
        // 
        //  Map directly to Win32..
        // 

        *pdwWin32Status = NTStatus;
    }
    else if (NTStatus  == STATUS_PENDING)
    {
        *pdwWin32Status = ERROR_IO_PENDING;
    }
    else if (NTStatus  == STATUS_BUFFER_OVERFLOW)
    {
        *pdwWin32Status = ERROR_MORE_DATA;
    }
    else if (NTStatus  == STATUS_UNSUCCESSFUL)
    {
        *pdwWin32Status = ERROR_GEN_FAILURE;
    }    
    else if (NTStatus  == STATUS_INSUFFICIENT_RESOURCES)
    {
        *pdwWin32Status = ERROR_NO_SYSTEM_RESOURCES;
    }
    else if (NTStatus  == STATUS_NOT_SUPPORTED)
    {
        *pdwWin32Status = ERROR_NOT_SUPPORTED;
    }
    else if (NTStatus  == STATUS_BUFFER_TOO_SMALL)
    {
        *pdwWin32Status = ERROR_INSUFFICIENT_BUFFER;
    }
    else if (NTStatus  == STATUS_INVALID_BUFFER_SIZE)        
    {
        *pdwWin32Status = ERROR_INVALID_USER_BUFFER;
    }
    else if (NTStatus  == STATUS_INVALID_PARAMETER)
    {
        *pdwWin32Status = ERROR_INVALID_PARAMETER;
    }
    else if (NTStatus  == STATUS_NO_MORE_ENTRIES)
    {
        *pdwWin32Status = ERROR_NO_MORE_ITEMS;
    } 
    else if (NTStatus  == STATUS_DEVICE_NOT_CONNECTED)
    {
        *pdwWin32Status = ERROR_DEVICE_NOT_CONNECTED;
    }
    else
    {
        *pdwWin32Status = ERROR_GEN_FAILURE;   
    }    

}   //  NT_STATUS_TO_WIN32_STATUS()

NOTE: When you apply this modification to NDISUIO, an assertion may occur in the Wzcsvc.dll module when you start the device. This assertion is harmless and can be ignored. To avoid the problem, use the retail version of the Wzcsvc.dll.

BUG: ZeroConfig (802.11) Fails When Scanning 20 or More Access Points Simultaneously (318556)

SYMPTOMS

CAUSE

RESOLUTION

STATUS