afaik tcp and udp are the same on top of ipv6 as they are on top of ipv4, there are no tcp6 and udp6, the "6" suffix just hints they are comminucated on top of ipv6, but the packets are the same as before, no new standards.
I could have sworn there was a different and simplified format for segments (datagrams are already about as simple as they can be), but I apparently had hallucinated it all these years. Turns out the only difference is using the larger addresses in the checksum algorithm.
Still, I do have to wonder about a port-free world. Seems a lot of things would get simpler.
Still, I do have to wonder about a port-free world. Seems a lot of things would get simpler.