Re: [quicwg/base-drafts] Describe PMTU probing that includes source connection ID for routing … (#2402)

Igor Lubashev <> Tue, 05 February 2019 13:58 UTC

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From: Igor Lubashev <>
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Subject: Re: [quicwg/base-drafts] Describe PMTU probing that includes source connection ID for routing … (#2402)
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> but it also says that you cannot have multiple connections, and you cannot have long headers post 1-RTT.

That's correct. You cannot coalesce QUIC packets belonging to multiple connections into the same UDP datagram. This is not changed.

It is also correct that a long-header packet past the completion of the handshake is not valid. So you need to do with that long-header QUIC packet what you would do with invalid packets -- drop it. (That's why the text says that such packets will not elicit an acknowledgement.) But then you should keep processing coalesced QUIC packets arriving in the same datagram, per text of the spec.

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