Otvorena mreža (Open network in Croatian) uses babel routing protocol, which in turn uses linux policy routing.
This blog post will go trough some simple commands to get to know how to use linux policy routing.
ip rule list - this command shows all policy routing tables
ip route list table babel - this command show routes in babel table
To see all tables on the system check it:
cat /etc/iproute2/rt_tables 20 olsr 21 babel 31 babel_default 30 olsr_default 0 unspec 253 default 254 main 255 local