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PTO is restarted on handshake confirmation #4734

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Jan 13, 2021
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PTO is restarted on handshake confirmation #4734

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58efd31
PTO is restarted on handshake confirmation
janaiyengar Jan 12, 2021
fdfcc48
initial keys are a different moment
janaiyengar Jan 13, 2021
161d059
parallel is better
janaiyengar Jan 13, 2021
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7 changes: 4 additions & 3 deletions draft-ietf-quic-recovery.md
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Expand Up @@ -602,9 +602,10 @@ before confirming that the client has verified the server's certificate and can
therefore read these 1-RTT packets.

A sender SHOULD restart its PTO timer every time an ack-eliciting packet is sent
or acknowledged, when the handshake is confirmed (Section 4.1.2 of
{{QUIC-TLS}}). This ensures the PTO is always set based on the latest estimate
of the round-trip time and for the correct packet across packet number spaces.
or acknowledged, when Initial keys are discarded (Section 4.9 of {{QUIC-TLS}}),
or when the handshake is confirmed (Section 4.1.2 of {{QUIC-TLS}}). This ensures
the PTO is always set based on the latest estimate of the round-trip time and
for the correct packet across packet number spaces.

When a PTO timer expires, the PTO backoff MUST be increased, resulting in the
PTO period being set to twice its current value. The PTO backoff factor is reset
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