private USB_STRING_DESCRIPTOR ParseStringDescriptor(EusbPdu pdu)
{
if (pdu is EusbUrbCompletionNoDataPdu)
{
Site.Log.Add(
LogEntryKind.Debug,
"Unexpectedly received an EusbUrbCompletionNoDataPdu message: {0}",
pdu
);
return(null);
}
Site.Assert.IsInstanceOfType(
pdu,
typeof(EusbUrbCompletionPdu),
"Must receive an EusbUrbCompletionPdu message."
);
EusbUrbCompletionPdu completionPdu = (EusbUrbCompletionPdu)pdu;
Site.Assert.IsSuccess(
(int)completionPdu.HResult,
"the HResult member of the EusbUrbCompletionPdu must be a successful code."
);
USB_STRING_DESCRIPTOR res = UsbStructParser.Parse <USB_STRING_DESCRIPTOR>(completionPdu);
Site.Assert.IsNotNull(res, "USB_STRING_DESCRIPTOR cannot be parsed from EusbUrbCompletionPdu");
return(res);
}
private bool SelectConfiguration(EusbDeviceContext device, byte configIndex)
{
// 6. Sends TS_URB_CONTROL_DESCRIPTOR_REQUEST with the descriptor type of USB_DEVICE_DESCRIPTOR_TYPE.
uint requestId = IdGenerator.NewId();
TS_URB_CONTROL_DESCRIPTOR_REQUEST des = new UrbBuilder(
URB_FUNCTIONID.URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE,
requestId,
0).BuildDeviceDescriptorRequest();
rdpeusbAdapter.TransferInRequest(device, des, USB_DEVICE_DESCRIPTOR.DefaultSize);
// 7. Receives a completion message with the result for USB_DEVICE_DESCRIPTOR.");
EusbUrbCompletionPdu pdu = (EusbUrbCompletionPdu)rdpeusbAdapter.ExpectCompletion(device.VirtualChannel);
if (null == pdu || pdu.HResult != (uint)HRESULT_FROM_WIN32.ERROR_SUCCESS)
{
return(false);
}
USB_DEVICE_DESCRIPTOR desDevice = UsbStructParser.Parse <USB_DEVICE_DESCRIPTOR>(pdu);
// 8. Sends TS_URB_CONTROL_DESCRIPTOR_REQUEST to retrieve the total length of the configuration.
requestId = IdGenerator.NewId();
des = new UrbBuilder(
URB_FUNCTIONID.URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE,
requestId,
0).BuildConfigurationDescriptorRequest(configIndex);
rdpeusbAdapter.TransferInRequest(device, des, USB_CONFIGURATION_DESCRIPTOR.DefaultSize);
// 9. Receives a completion message with the result for USB_CONFIGURATION_DESCRIPTOR.");
pdu = (EusbUrbCompletionPdu)rdpeusbAdapter.ExpectCompletion(device.VirtualChannel);
if (null == pdu || pdu.HResult != (uint)HRESULT_FROM_WIN32.ERROR_SUCCESS)
{
return(false);
}
USB_CONFIGURATION_DESCRIPTOR desConfig = UsbStructParser.Parse <USB_CONFIGURATION_DESCRIPTOR>(pdu);
// 10. Sends TS_URB_CONTROL_DESCRIPTOR_REQUEST with the actual length of USB_CONFIGURATION_DESCRIPTOR result.
requestId = IdGenerator.NewId();
des = new UrbBuilder(
URB_FUNCTIONID.URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE,
requestId,
0).BuildConfigurationDescriptorRequest(configIndex);
rdpeusbAdapter.TransferInRequest(device, des, desConfig.wTotalLength);
// 11. Receives a completion message with the complete result for USB_CONFIGURATION_DESCRIPTOR.");
pdu = (EusbUrbCompletionPdu)rdpeusbAdapter.ExpectCompletion(device.VirtualChannel);
// 12. Sends TS_URB_SELECT_CONFIGURATION URB request.
UsbConfigurationParser configParser = new UsbConfigurationParser();
configParser.ParseAll(pdu);
requestId = IdGenerator.NewId();
TS_URB_SELECT_CONFIGURATION sel = new UrbBuilder(
URB_FUNCTIONID.URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE,
requestId,
0).BuildSelectConfigRequest(configParser.Interfaces, configParser.configDescriptor);
rdpeusbAdapter.TransferInRequest(device, sel, 0);
// 13. Receives a completion message with the result for configuration selection.");
EusbUrbCompletionNoDataPdu pduRes = (EusbUrbCompletionNoDataPdu)rdpeusbAdapter.ExpectCompletion(device.VirtualChannel);
if (null == pduRes || pduRes.HResult != (uint)HRESULT_FROM_WIN32.ERROR_SUCCESS)
{
return(false);
}
TS_URB_SELECT_CONFIGURATION_RESULT urb = new TS_URB_SELECT_CONFIGURATION_RESULT();
if (!PduMarshaler.Unmarshal(pduRes.TsUrbResult, urb))
{
return(false);
}
context.SelectedConfig = urb;
return(true);
}