Hi all, I was very liberal in just using numbers from the 'open' number range. We should move to a different scheme and just take the liberty to take one ID and then have our own header inside there. I would propose to do something like this struct ipa_proto_hdr { uint16_t len; uint8_t proto; data[0]; } packed; struct osmo_ipa_proto_hdr { uint8_t osmo_proto; data[0]; } packed;. Any comments?