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Here be dragons #3421

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merged 2 commits into from Feb 11, 2020
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Here be dragons #3421

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Extension dragons
MikeBishop Feb 5, 2020
2af27a1
Not just frames
MikeBishop Feb 5, 2020
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6 changes: 6 additions & 0 deletions draft-ietf-quic-transport.md
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Expand Up @@ -5710,6 +5710,12 @@ that a peer is able to understand the frame. An endpoint can use a transport
parameter to signal its willingness to receive one or more extension frame types
with the one transport parameter.

Extensions that modify or replace core protocol functionality (including frame
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do we want to be specific about this version?

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We don't yet know about the portability of extensions across versions. I'm kind of inclined to just leave that topic for future-us.

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+1, this document only discusses this version. Any other version is future work

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Makes sense, I agree.

types) will be difficult to combine with other extensions which modify or
replace the same functionality unless the behavior of the combination is
explicitly defined. Such extensions SHOULD define their interaction with
previously-defined extensions modifying the same protocol components.

Extension frames MUST be congestion controlled and MUST cause an ACK frame to
be sent. The exception is extension frames that replace or supplement the ACK
frame. Extension frames are not included in flow control unless specified
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