Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE in 0-RTT (#3440)
Kazuho Oku <notifications@github.com> Wed, 04 March 2020 00:02 UTC
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Subject: Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE in 0-RTT (#3440)
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kazuho commented on this pull request. LGTM modulo the points below. > -- CRYPTO frames and CONNECTION_CLOSE frames signaling errors at the QUIC layer - (type 0x1c) MAY appear in packets of any encryption level except 0-RTT. +- CONNECTION_CLOSE frames signaling errors at the QUIC layer (type 0x1c) MAY + appear in any packet number space. CONNECTION_CLOSE frames signaling + application errors (type 0x1d) MAY appear in every packet number space other + than Initial. I think we should forbid CONNECTION_CLOSE (0x1d) from being used in Handshake packets. It is the responsibility of an encrypted transport encrypted *and authenticated* channel to the application. Handshake packets do not provide that. Consider the case of a pot protocol that returns a boolean indicating if it is a coffee pot or a tea pot. Such an application protocol can use application close to indicate that boolean. But can a coffee pot send that boolean in a Handshake packet? Definitely not! Because somebody from Britain might spoof a Handshake packet that tells the client that it is in fact a tea pot. > + the client has Handshake keys. Under these circumstances, a server SHOULD + send a CONNECTION_CLOSE frame in both Handshake and Initial packets to ensure + that at least one of them is processable by the client. + +* A client that sends CONNECTION_CLOSE in a 0-RTT packet cannot be assured of + the server has accepted 0-RTT and so sending a CONNECTION_CLOSE frame in an + Initial packet makes it more likely that the server can receive the close + signal, even if the application error code might not be received. + +* Prior to confirming the handshake, a peer might be unable to process 1-RTT + packets, so an endpoint SHOULD send CONNECTION_CLOSE in both Handshake and + 1-RTT packets. A server SHOULD also send CONNECTION_CLOSE in an Initial + packet. + +An CONNECTION_CLOSE of type 0x1d MUST be replaced by a CONNECTION_CLOSE of type +0x1c when sending the frame in Initial packets. Otherwise, information about "Initial or Handshake packets" due to the reason stated above. > -: A CONNECTION_CLOSE frame of type 0x1c can appear in Initial, Handshake, and -1-RTT packets, whereas a CONNECTION_CLOSE of type 0x1d can only appear in a -1-RTT packet. +: A CONNECTION_CLOSE frame of type 0x1d cannot appear in Initial packets. Initial or Handshake > @@ -5680,10 +5693,10 @@ Reason Phrase: This SHOULD be a UTF-8 encoded string {{!RFC3629}}. The application-specific variant of CONNECTION_CLOSE (type 0x1d) can only be -sent using an 1-RTT packet ({{QUIC-TLS}}, Section 4). When an application -wishes to abandon a connection during the handshake, an endpoint can send a -CONNECTION_CLOSE frame (type 0x1c) with an error code of 0x15a ("user_canceled" -alert; see {{?TLS13}}) in an Initial or a Handshake packet. +sent using 0-RTT or 1-RTT packets ({{QUIC-TLS}}, Section 4). When an Good to know that the sentence here forbids CONNECTION_CLOSE (0x1d) being used in Handshake packets. Maybe it's the case that we changed here, but not the other places (that I have pointed out). -- 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/3440#pullrequestreview-368410473
- [quicwg/base-drafts] Allow CONNECTION_CLOSE in 0-… Martin Thomson
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… ianswett
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Martin Thomson
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Kazuho Oku
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Mike Bishop
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Martin Thomson
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Martin Thomson
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Kazuho Oku
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Martin Thomson
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Marten Seemann
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Mike Bishop
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Martin Thomson
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Martin Thomson
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Martin Thomson
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Martin Thomson
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Kazuho Oku
- Re: [quicwg/base-drafts] Allow CONNECTION_CLOSE i… Martin Thomson
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Martin Thomson
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Jana Iyengar
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Jana Iyengar
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Kazuho Oku
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Martin Thomson
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Martin Thomson
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Martin Thomson
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Kazuho Oku
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Martin Thomson
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… ekr
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Martin Thomson
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Martin Thomson
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… David Schinazi
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… ianswett
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Martin Thomson
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Kazuho Oku
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… MikkelFJ
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Martin Thomson
- Re: [quicwg/base-drafts] Early CONNECTION_CLOSE f… Jana Iyengar