[Babel-users] babeld for android?

[Justin Kilpatrick]

You may find this interesting Dave

https://blog.althea.net/althea-development-update-79/

The tl;dr is that I wrote a kinda working stub Babel implementation located here

https://gist.github.com/jkilpatr/0d004bdbd1618ca73d5581c3f8baa0ae

But it's almost totally unusable for my use case due to Android's networking rules. At this
point I have completed the Althea Android client but I had to make some very hard compromises
including using Ipv4 everywhere and encryption only to the host router where traffic is natted. You can
see dev update 80 for the whole saga.

Your use case is different than mine and I think the thing that is going to trip you up is that at least
in my testing all ipv6 packets on a subnet are addressed at the Ethernet frame level to whomever
the router advertisement for SLACC was received from. So your packets may be addressed correctly
on l3 but end up at your cell carriers data center because of the l2 address.

I don't know how that interacts with the LTE interface and such. Maybe things actually work over that
transport. 

Regardless I've shipped the app and moved on. So I can't contribute to a Babel for Android project
at the moment in a meaningful way except to speculate on what didn't work for me. 

https://play.google.com/store/apps/details?id=com.althea.althea_android
https://github.com/althea-net/althea-android

-- 
  Justin Kilpatrick
  justin at althea.net

On Fri, Jan 31, 2020, at 1:58 PM, Dave Taht wrote:
> Recently my cellphone (t-mobile based) finally started supplying ipv6
> addresses via slaac to the tethered devices over wifi. (I don't know
> whether to be pleased or terrified)
> It's limited to 10 devices total (don't know why or where that limit
> is enforced), and I would rather like to have a cellphone backup link
> when the rest of my ISP universe fails.
> 
> Has anyone attempted to get babel running on android recently? Or
> attempted a java or koitlin version?
> 
> Was there any public code for an apple version?
> 
> is android compiled with support for source specific routing?
> 
> PS also the mptcp patches started landing in the linux kernel, and
> wireguard was just merged also.
> 
> 
> -- 
> Make Music, Not War
> 
> Dave Täht
> CTO, TekLibre, LLC
> http://www.teklibre.com
> Tel: 1-831-435-0729
> 
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