Re: [quicwg/base-drafts] QUIC header format/demultiplexing (#426)

[janaiyengar <[e-mail]>]

Copying discussion from #956 so that it's happening on this bug instead.

@ronieven said: "My understanding from the meeting was that there is no need to multiplex short header with stun so the change of the type values for the short header is a surprise and I did not see any discussion on the QUIC mailing list about this change. It is not mentioned also in the Singapore meeting notes. The change that was agreed as far as I remember was to flip the value of the connection ID flag since it will be on for the peer to peer case."

@csperkins said: "We certainly need to demux QUIC short header packets with STUN, to maintain bindings.

Changing the packet type values doesn't prevent the spin bit, although it might change which bit is used as the spin bit."

@britram said: "Note also that #989 would give us more degrees of freedom in the short header first octet."

@ekr said: "Colin is right here. You have to multiplex short headers with STUN b/c of consent checks, as well as candidates you learn about late"

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