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Re: [rtcweb] [Cake] [rmcat] Catching up on diffserv markings

Loganaden Velvindron <loganaden@gmail.com> Fri, 23 October 2015 13:31 UTC

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Date: Fri, 23 Oct 2015 17:31:56 +0400
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From: Loganaden Velvindron <loganaden@gmail.com>
To: Justin Uberti <juberti@google.com>
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Cc: "aqm@ietf.org" <aqm@ietf.org>, "cake@lists.bufferbloat.net" <cake@lists.bufferbloat.net>, "rmcat@ietf.org" <rmcat@ietf.org>, "rtcweb@ietf.org" <rtcweb@ietf.org>, Colin Perkins <csp@csperkins.org>
Subject: Re: [rtcweb] [Cake] [rmcat] Catching up on diffserv markings
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On Thu, Oct 22, 2015 at 11:54 PM, Justin Uberti <juberti@google.com> wrote:

> At present I'm not aware of any widely-deployed OS where an app can read
> the received ECN markings.
>
> iOS9 added support for this within the kernel, and it's used for TCP, but
> not exposed to userspace. There is an open Radar bug asking for this info
> to be exposed to userspace.
>
> FWIW, Chrome supports setting the DSCP markings if you set a magic
> parameter. But it's not on by default, mainly because we've never done the
> auditing necessary to ensure this doesn't randomly break in various
> dimly-lit parts of the internet.
>
>
> dimly-lit ? You mean regions like Africa ?

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