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 ?