Re: [quicwg/base-drafts] Merge Crypto timeout and PTO (#2806)
ianswett <notifications@github.com> Sat, 13 July 2019 11:23 UTC
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Subject: Re: [quicwg/base-drafts] Merge Crypto timeout and PTO (#2806)
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ianswett commented on this pull request. Thanks Ryan, I took your editorial suggestion, I can file an issue for the last comment. > ## Probe Timeout {#pto} -A Probe Timeout (PTO) triggers a probe packet when ack-eliciting data is in -flight but an acknowledgement is not received within the expected period of -time. A PTO enables a connection to recover from loss of tail packets or acks. -The PTO algorithm used in QUIC implements the reliability functions of Tail Loss -Probe {{?TLP=I-D.dukkipati-tcpm-tcp-loss-probe}} {{?RACK}}, RTO {{?RFC5681}} and +A Probe Timeout (PTO) triggers sending one or two probe packets when It's 1 or 2 because some impls only do 1 packet PTO(TLP). I could recommend two packets during the handshake, in order to speed handshake completion? It actually should be datagrams, but I'm inclined to change that in a follow-up, rather that burying it in this change? > +data. If no data can be sent, then the PTO alarm MUST NOT be armed until +data has been received from the client. + +Because the server could be blocked until more packets are received, the client +MUST ensure that the retransmission timer is set if the client does not yet +have 1-RTT keys. If the probe timer expires before the client has 1-RTT keys, +it is possible that the client may not have any crypto data to retransmit. +However, the client MUST send a new packet, containing only PADDING frames if +necessary, to allow the server to continue sending data. If Handshake keys +are available to the client, it MUST send a Handshake packet, and otherwise +it MUST send an Initial packet in a UDP datagram of at least 1200 bytes. + +Because Initial packets only containing PADDING do not elicit an +acknowledgement, they may never be acknowledged, but they are removed from +bytes in flight when the client gets Handshake keys and the Initial keys are +discarded. True, we recommend that elsewhere. I think we should change that in a follow-up though, since it's not directly related to this change? -- 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/2806#pullrequestreview-261537548
- [quicwg/base-drafts] Merge Crypto timeout and PTO… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… MikkelFJ
- Re: [quicwg/base-drafts] Merge Crypto timeout and… Marten Seemann
- Re: [quicwg/base-drafts] Merge Crypto timeout and… MikkelFJ
- Re: [quicwg/base-drafts] Merge Crypto timeout and… Matt Olson
- Re: [quicwg/base-drafts] Merge Crypto timeout and… Matt Olson
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… Martin Thomson
- Re: [quicwg/base-drafts] Merge Crypto timeout and… MikkelFJ
- Re: [quicwg/base-drafts] Merge Crypto timeout and… Marten Seemann
- Re: [quicwg/base-drafts] Merge Crypto timeout and… MikkelFJ
- Re: [quicwg/base-drafts] Merge Crypto timeout and… Marten Seemann
- Re: [quicwg/base-drafts] Merge Crypto timeout and… MikkelFJ
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… Nick Banks
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… Jana Iyengar
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… Jana Iyengar
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… Jana Iyengar
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… Ryan Hamilton
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett
- Re: [quicwg/base-drafts] Merge Crypto timeout and… ianswett