error from initialize_device in core.py

[pk-mdt]

I am trying to proxy a device using a GF one.
I validated this on 2 separate operating systems, Kali and Ubuntu, virtual and bare metal, respectively. The Ubuntu installation is using Python 3.6.9 and Kali is using Python 3.8.2
I have validated I can see the device using the sample code from the Greatfet issues, so the hardware appears to be working.
`import greatfet

gf = greatfet.GreatFET()
descriptor = gf.glitchkit.usb.capture_control_in(
request= gf.glitchkit.usb.GET_DESCRIPTOR,
value = gf.glitchkit.usb.GET_DEVICE_DESCRIPTOR,
length = 18
)
print(descriptor)
b'\x12\x01\x00\x02\x00\x00\x00@P\x1d\x89\x03\x01\x01\x02\x04\x01'
However using the function in Facedancer generates the error:
`
u = FacedancerUSBHostApp(verbose=3)
Using GreatDancer Host backend.

u.initialize_device(assign_address=1, apply_configuration=1)
Traceback (most recent call last):
File "", line 1, in
File "/usr/local/lib/python3.8/dist-packages/facedancer-2.9-py3.8.egg/facedancer/core.py", line 365, in initialize_device
File "/usr/local/lib/python3.8/dist-packages/facedancer-2.9-py3.8.egg/facedancer/core.py", line 401, in read_ep0_max_packet_size
File "/usr/local/lib/python3.8/dist-packages/facedancer-2.9-py3.8.egg/facedancer/core.py", line 395, in get_device_descriptor
File "/usr/local/lib/python3.8/dist-packages/facedancer-2.9-py3.8.egg/facedancer/core.py", line 386, in get_descriptor
File "/usr/local/lib/python3.8/dist-packages/facedancer-2.9-py3.8.egg/facedancer/core.py", line 291, in control_request_in
File "/usr/local/lib/python3.8/dist-packages/facedancer-2.9-py3.8.egg/facedancer/backends/greathost.py", line 369, in send_on_endpoint
OSError: Stalled!
`

[Qyriad]

If you're trying to proxy a device, then you should be using FacedancerUSBApp and USBProxyDevice instead of FacedancerUSBHostApp. Look at scripts like facedancer-usbproxy.py and usbproxy-switch-invertx.py for examples.

[pk-mdt]

True, but I was just trying to enumerate the device so I could confirm USB1 worked, those two scripts I also had issues with and I wanted to confirm I had physical connectivity working before proxying. The OSError seemed to be universal across recent python versions so I wanted to raise the issue.

[straithe]

Do you still need assistance, @pk-r7 ?

[pk-mdt]

Yes the issue was never resolved.

[straithe]

Thank you for the update! I don't quite have the skills to assist you, but I will ensure someone on my team takes a look at this soon.