protected override DeviceStream OpenDeviceDirectly(OpenConfiguration openConfig)
{
RequiresGetInfo();
var stream = new LinuxHidStream(this);
try { stream.Init(_path); return(stream); }
catch { stream.Close(); throw; }
}
bool TryParseReportDescriptor(out Reports.ReportDescriptor parser, out byte[] reportDescriptor)
{
parser = null; reportDescriptor = null;
int handle;
try { handle = LinuxHidStream.DeviceHandleFromPath(_path, this, NativeMethods.oflag.NONBLOCK); }
catch (FileNotFoundException) { throw DeviceException.CreateIOException(this, "Failed to read report descriptor."); }
try
{
uint descsize;
if (NativeMethods.ioctl(handle, NativeMethods.HIDIOCGRDESCSIZE, out descsize) < 0)
{
return(false);
}
if (descsize > NativeMethods.HID_MAX_DESCRIPTOR_SIZE)
{
return(false);
}
var desc = new NativeMethods.hidraw_report_descriptor()
{
size = descsize
};
if (NativeMethods.ioctl(handle, NativeMethods.HIDIOCGRDESC, ref desc) < 0)
{
return(false);
}
Array.Resize(ref desc.value, (int)descsize);
parser = new Reports.ReportDescriptor(desc.value);
reportDescriptor = desc.value; return(true);
}
finally
{
NativeMethods.retry(() => NativeMethods.close(handle));
}
}
