Re: [quicwg/base-drafts] Change PTO to be per packet number space (#3066)

[Marten Seemann <[e-mail]>]

marten-seemann commented on this pull request.



>  
 The PTO value MUST be set to at least kGranularity, to avoid the timer expiring
 immediately.
 
+A sender computes its PTO timer every time an ack-eliciting packet is sent.
+When ack-eliciting packets are in-flight in multiple packet number spaces,
+the timer MUST be set for the packet number space with the earliest timeout,
+except for ApplicationData, which MUST be ignored until the handshake
+completes; see Section 4.1.1 of {{QUIC-TLS}}.  Not arming the PTO for
+ApplicationData prioritizes completing the handshake and prevents the server
+from sending a 1-RTT PTO packet before it has the keys to process a 1-RTT
+packet.  This simplifies to setting the PTO on the lowest active packet number
+space if packets from two different packet number spaces are sent when the PTO
+fires.

@ianswett No, I didn't mean t=3. The Handshake packet was sent sent at t=0, and we're doing one exponential backoff, meaning that the timer duration should be 2.
Or am I missing something here?

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/quicwg/base-drafts/pull/3066#discussion_r342908364