Hi,
I was just looking for a name: the name of the metric (is that ETX?) that is used in batman-adv. Actually i did not find any useful info in old messages on the list.
The metric used by batman-adv is called TQ (Transmission Quality) and expresses the sending link quality from the current node all the way down to the destination.
There is a document explaining the main ideas behind the algorithm used by batman-adv that you can download here: http://gitorious.org/batman-adv-doc
Disclaimer: This paper is not an official document / complete / meant to be a RFC / etc. Use it at your own risk. ;)
Regards, Marek