[Commotion-dev] adding Babel + IPv6 support - follow-up

[Linic]

Hi everyone,

In the middle of January, we started working on adding Babel with IPv6 
support to the Commotion firmware. Right now we are here :

1. We have an auto-configuration script that is close to completion for 
Babel.
Babel should work natively with IPv4 and IPv6 in the end.

2. We have implemented scripts to auto-assign IPv6 prefixes to nodes 
based on RFC4193 and BCP106.
Prefixes are used to issue a default unique-local address to the network 
interface used for the lan where computers that host services or connect 
to the mesh are connected. In the end, the node will also be able to 
dynamically assign addresses to this lan. A 48 bit prefix is generated. 
It leaves 16 bits for the node owner for subnetting as needed.

3. We have made some modifications to the web interface to be able to 
activate Babel within it.
Right now, selecting Babel as the «Protocol of the new interface» starts 
babeld and assigns an IPv6 prefix if it's not already present. From what 
we understand, the web interface is a very important piece of the 
Commotion firmware. We understand that our modifications here may not be 
accepted.

During the month, we will start to divide these functionalities and 
create pull-request. The most important points for us are 1. and 2.

Thank you in advance for your help in the next days and have a nice day!

Nicolas Brochu
Developer
Team Réseau Libre
École Polytechnique de Montréal