Date: Wed, 27 Jun 2018 10:49:21 -0700
From: MikkelFJ <notifications@github.com>
Reply-To: quicwg/base-drafts
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Message-ID: <quicwg/base-drafts/pull/1491/c400772206@github.com>
In-Reply-To: <quicwg/base-drafts/pull/1491@github.com>
References: <quicwg/base-drafts/pull/1491@github.com>
Subject: Re: [quicwg/base-drafts] Don't Change Source CID After Retry (#1491)
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Not all in fresh memory but goes like:
Clients sends original random DCID to server.
Server sends retry back to client with a servers SCID
Client uses retry SCID as its new DCID towards the server.
Client uses whatever SCID it happens to prefer, 0 lenght or otherwise, call this Client-SCID.

If the Client-SCID does not change an new random retries happen, the client might be confused. If the server changes Client-SCID it can distinguish responses. But there is a long dicussion that never got fully resolved. Changing Client-SCID is just one option. Reflecting a separate NONCE per retry is probably either better or also needed.

https://github.com/quicwg/base-drafts/issues/1451

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<p>Not all in fresh memory but goes like:<br>
Clients sends original random DCID to server.<br>
Server sends retry back to client with a servers SCID<br>
Client uses retry SCID as its new DCID towards the server.<br>
Client uses whatever SCID it happens to prefer, 0 lenght or otherwise, ca=
ll this Client-SCID.</p>
<p>If the Client-SCID does not change an new random retries happen, the c=
lient might be confused. If the server changes Client-SCID it can disting=
uish responses. But there is a long dicussion that never got fully resolv=
ed. Changing Client-SCID is just one option. Reflecting a separate NONCE =
per retry is probably either better or also needed.</p>
<p><a class=3D"issue-link js-issue-link" data-error-text=3D"Failed to loa=
d issue title" data-id=3D"332829542" data-permission-text=3D"Issue title =
is private" data-url=3D"https://github.com/quicwg/base-drafts/issues/1451=
" href=3D"https://github.com/quicwg/base-drafts/issues/1451">#1451</a></p=
>

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