Date: Wed, 01 Mar 2017 16:42:39 -0800
From: Martin Thomson <notifications@github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Message-ID: <quicwg/base-drafts/issues/353@github.com>
Subject: [quicwg/base-drafts] Replace CONNECTION_CLOSE with Public Reset (#353)
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@martinduke suggested that we might remove CONNECTION_CLOSE in favour of using a Public Reset packet.  That would require that the error code be made public knowledge.

I can see a few advantages for a middlebox, primary of these being a clear signal that a connection is done (though that would not be something that could be strongly authenticated).  It would also simplify state on servers that decide to terminate a connection: they only have to keep whatever information they need to generate a Public Reset, which is a single piece of global state. 

The downside is the insights that the error code give into the otherwise confidential operations of the protocol (we'd likely want to tighten the level of detail in error codes).  Also, it means that a server that wants to permit retries would have to send two packets: a GOAWAY packet in addition to the Public Reset.

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<p><a href="https://github.com/martinduke" class="user-mention">@martinduke</a> suggested that we might remove CONNECTION_CLOSE in favour of using a Public Reset packet.  That would require that the error code be made public knowledge.</p>
<p>I can see a few advantages for a middlebox, primary of these being a clear signal that a connection is done (though that would not be something that could be strongly authenticated).  It would also simplify state on servers that decide to terminate a connection: they only have to keep whatever information they need to generate a Public Reset, which is a single piece of global state.</p>
<p>The downside is the insights that the error code give into the otherwise confidential operations of the protocol (we'd likely want to tighten the level of detail in error codes).  Also, it means that a server that wants to permit retries would have to send two packets: a GOAWAY packet in addition to the Public Reset.</p>

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