RE: Big TP codespace

Mike Bishop <mbishop@evequefou.be> Wed, 15 May 2019 17:20 UTC

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From: Mike Bishop <mbishop@evequefou.be>
To: Eric Rescorla <ekr@rtfm.com>, David Schinazi <dschinazi.ietf@gmail.com>
CC: IETF QUIC WG <quic@ietf.org>, Christian Huitema <huitema@huitema.net>, Martin Duke <martin.h.duke@gmail.com>
Subject: RE: Big TP codespace
Thread-Topic: Big TP codespace
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Date: Wed, 15 May 2019 17:20:35 +0000
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We agreed in Tokyo that we would not mandate that implementations check for improper peer behavior when doing so required substantial extra work.  Implementations MUST error out on easily-detected errors, but only SHOULD/MAY error on things they would have to actively check (unless they’re already required to actively check for security reasons, in which case there’s no extra work).

From: QUIC <quic-bounces@ietf.org> On Behalf Of Eric Rescorla
Sent: Tuesday, May 14, 2019 5:21 PM
To: David Schinazi <dschinazi.ietf@gmail.com>
Cc: IETF QUIC WG <quic@ietf.org>; Christian Huitema <huitema@huitema.net>; Martin Duke <martin.h.duke@gmail.com>
Subject: Re: Big TP codespace

What's the bigger principle you are endorsing? What errors "like this" are we not requiring detection of?

On Mon, May 13, 2019 at 5:19 PM David Schinazi <dschinazi.ietf@gmail.com<mailto:dschinazi.ietf@gmail.com>> wrote:
Our implementation checks for duplicates only for the transport parameters it supports. I think #2691<https://github.com/quicwg/base-drafts/pull/2691/files> is the correct solution.

+1 to the design principle of encouraging but not requiring detection of errors like this

David

On Mon, May 13, 2019 at 2:06 PM Christian Huitema <huitema@huitema.net<mailto:huitema@huitema..net>> wrote:


> On May 13, 2019, at 1:58 PM, Martin Duke <martin.h.duke@gmail.com<mailto:martin.h.duke@gmail.com>> wrote:
>
> What do people think?

I think the general rule of protocol policing should be "MUST NOT" do dastardly stuff, and "MAY" drop the connection when that happens.

-- Christian Huitema