Missing `passt` binary

[NN708]

virt-manager supports passt as network backend (virt-manager/virt-manager#697), but the passt binary is not present in this extension, causing an error when attempting to start a VM:

Error starting domain: Cannot find 'passt' in path: No such file or directory

Traceback (most recent call last):
  File "/app/share/virt-manager/virtManager/asyncjob.py", line 71, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/app/share/virt-manager/virtManager/asyncjob.py", line 107, in tmpcb
    callback(*args, **kwargs)
  File "/app/share/virt-manager/virtManager/object/libvirtobject.py", line 57, in newfn
    ret = fn(self, *args, **kwargs)
          ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/share/virt-manager/virtManager/object/domain.py", line 1384, in startup
    self._backend.create()
  File "/app/lib/python3.12/site-packages/libvirt.py", line 1379, in create
    raise libvirtError('virDomainCreate() failed')
libvirt.libvirtError: Cannot find 'passt' in path: No such file or directory

[tulilirockz]

Good catch! Should be just fine to add it inside of the extension. Just to make sure - does this depend on passt being run by a privileged user? If so that might just not work at all

[NN708]

passt is an unprivileged user-mode networking tool, so it is not intended to be run by a privileged user.

[tulilirockz]

Perfect! So this can be included just fine. Thank you!

[n3thshan]

hi! seems like the MR relies on some upstream stuff. until those get sorted, is there any workaround to get passt to work? im on Project Aurora (@tulilirockz hehe 😄). for context, im trying to RDP into a windows guest and passt appeared as an option. The other option was to create a SLIRP NIC with port forwarding which seems to be unreliable. what are your thoughts? Sorry idk the workings of these things.