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Re: Closing on CONNECTION_CLOSE

Dmitri Tikhonov <dtikhonov@litespeedtech.com> Fri, 28 July 2017 12:49 UTC

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Date: Fri, 28 Jul 2017 08:49:51 -0400
From: Dmitri Tikhonov <dtikhonov@litespeedtech.com>
To: Jana Iyengar <jri@google.com>
Cc: Eric Rescorla <ekr@rtfm.com>, "Swindells, Thomas (Nokia - GB/Cambridge, UK)" <thomas.swindells@nokia.com>, IETF QUIC WG <quic@ietf.org>, Christian Huitema <huitema@huitema.net>, Ian Swett <ianswett@google.com>
Subject: Re: Closing on CONNECTION_CLOSE
Message-ID: <20170728124951.GB2686@ubuntu-dmitri>
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On Thu, Jul 27, 2017 at 03:35:49PM +0000, Jana Iyengar wrote:
> That said, I'm still thinking about if it's possible for an old packet
> circling the network to create connection state when received after
> all state is torn down... If we want to ensure that doesn't happen,
> we'd want to account for network lifetime (2
> msl).

Unlikely, because version negotiation occurs when new connection is
established and thus first few incoming packets would have to have the
VERSION bit set:

  " A QUIC connection begins with a client sending a handshake packet. The
  " details of the handshake mechanisms are described in {{handshake}},
  " but all of the initial packets sent from the client to the server
  " MUST use the long header format and MUST specify the version of the
  " protocol being used.

  - Dmitri.

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