Hi,I've implemented an XDP socket that sends a simple UDP message to a server that listens on a specific port. I therefore create the packet with ethernet header, ip header, udp header and payload. This all works fine on an interface which is not the loopback interface, however if I try to use the loopback interface I see that my packet is send (I can see it in wireshark, all checksum are correct ), however the program the server never receives that packet. If I use netcat as a client to send to the server I see exactly the same data in wireshark as when I send it with XDP but in that case the packet arrives in the server.
My question is can you send over the loopback interface XDP TX to a standard udp socket or is this not possible ?Do I have to configure my loopback interface in a spacial way ?
All tips are welcome Erik
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