Good day! Maybe someone has an idea or "food for thought" to my problem:

I want make a pseudo-bridge between a VM and a host in the userspace (both systems are linux). There is a genius implementation called ixy (https://github.com/emmericp/ixy) which is an userspace network driver. Now I want to send all traffic via ixy from a tap-device (guest) to the host's bridge and vice versa.

My problem now is: i can send and receive packages in both ways, but when I send something to the tap-device it does not process it properly. For example: the arp-table shows always "incomplete" for the tap-device, even though i become proper arp replys from the host's bridge.

Thanks in advance a have a nice day.

Best

I have solved the problem for myself.
The problem was: I had a blocking call in my program (yes, I know I'm dumb ) and now I can properly send packages. I was not aware of this blocking call, because I used rust which I used the first time.