I can confirm that Steam In-Home Streaming does work properly over tinc,
for having tried it myself, as long as tinc is configured to route the
broadcasts properly, as Guus described. Note that it would be easier to set
up tinc nodes on your Windows desktop and Linux laptops, to avoid the
additional complication of having to relay broadcast packets between your
local networks and the tinc network. This is what I do in my setup.

That said, it strikes me as a bit odd that Steam is sending broadcast to a
.127 address. That would indicate that your local network is configured as
/25, which could be a valid configuration but is a bit unusual. Are you
sure your subnets are configured correctly?

On 13 April 2018 at 07:10, Guus Sliepen <g...@tinc-vpn.org> wrote:

> On Thu, Apr 12, 2018 at 11:57:27PM +0200, Alex Corcoles wrote:
>
> > I've got a four site site-to-site tinc mesh working nicely. I have the
> > following systems at two of those sites:
> >
> > 10.a.a.2: Linux box running tinc and DHCP/DNS for site A
> > 10.a.a.dhcp: Windows desktop with a GPU
> > 10.b.b.2: Linux box running tinc and DHCP/DNS for site B
> > 10.b.b.dhcp: Linux laptop
> >
> > I'd like to use Steam In-Home Streaming to game in the laptop streaming
> > from the desktop. The Steam protocol is not well documented, but it
> > seems to rely on UDP broadcasts to x.x.x.127 UDP port 27036 to discover
> > remote nodes.
>
> Tinc itself supports UDP broadcast packets. However, in router mode, it
> will only treat 255.255.255.255/32 and 224.0.0.0/4 as broadcast address
> ranges. If you are using tinc 1.1pre11 or later, you can add the
> following to your tinc.conf files:
>
> BroadcastSubnet = x.x.x.127
>
> --
> Met vriendelijke groet / with kind regards,
>      Guus Sliepen <g...@tinc-vpn.org>
>
> _______________________________________________
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>
>
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