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[quicwg/base-drafts] Lost Server Initial Takes Too Long to be Retransmitted (#3078)

Nick Banks <notifications@github.com> Fri, 04 October 2019 00:24 UTC

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Subject: [quicwg/base-drafts] Lost Server Initial Takes Too Long to be Retransmitted (#3078)
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Generally, the server's first flight (of a 1-RTT connection attempt) has a single Initial packet and the rest is made up of 1 or more Handshake packets. If the UDP datagram containing the Initial packet is lost, the server only ends up retransmitting it based off the default RTT based PTO timer.

If/when the client receives the Handshake packets that it can't decrypt (because the Initial was lost) then it has a (possible) signal that the server has responded, but a packet was lost. The client could use this info to immediately retransmit its Initial. If/when the server receives this, it could use this info to retransmit its Initial.

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