The operating mode of the virtual device. Allowed values are %NM_SETTING_TUN_MODE_TUN to create a layer 3 device and %NM_SETTING_TUN_MODE_TAP to create an Ethernet-like layer 2 one.
If the property is set to %TRUE, the interface will support multiple file descriptors (queues) to parallelize packet sending or receiving. Otherwise, the interface will only support a single queue.
The user ID which will own the device. If set to %NULL everyone will be able to use the device.
If %TRUE the interface will prepend a 4 byte header describing the physical interface to the packets.
If %TRUE the IFF_VNET_HDR the tunnel packets will include a virtio network header.
The group ID which will own the device. If set to %NULL everyone will be able to use the device.