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Re: [quicwg/base-drafts] introduce a max_connection_ids transport parameter (#1998)

Mike Bishop <notifications@github.com> Thu, 07 February 2019 18:59 UTC

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Date: Thu, 07 Feb 2019 18:59:11 +0000
From: Mike Bishop <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] introduce a max_connection_ids transport parameter (#1998)
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MikeBishop commented on this pull request.



> @@ -3981,6 +3979,12 @@ A client MUST NOT include an original connection ID, a stateless reset token, or
 a preferred address.  A server MUST treat receipt of any of these transport
 parameters as a connection error of type TRANSPORT_PARAMETER_ERROR.
 
+max_connection_ids (0x000e):
+
+: The maximum number of connection IDs that the peer is willing to store.
+  This value includes only connection IDs sent in NEW_CONNECTION_ID frames.

Iff you count the handshake and SPA CIDs, an overflow just from transport parameters is possible if set to 0/1, as @marten-seemann pointed out earlier.  Overflows are also possible based on the advice to replace upon seeing a new CID enter use, though I think that's best addressed by just not recommending/allowing that.

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