[olsr-dev] olsrd-0.4.8

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Hi, I'm working on my final thesis with the olsrd-0.4.8 implementation on
linux 2.6. 
In my scenario I have 4 wireless terminals, and I would like the routing
was performed in a ring manner.
I have some questions:
1)Is it right to hide opposite laptop using iptables rules in this way?
#on terminal with MAC 00:90:4b:4c:0c:f9
iptables -t mangle -A PREROUTING -m mac --mac-source 00:90:4b:4c:11:e8

#on terminal with MAC 00:90:4b:4c:11:e8
iptables -t mangle -A PREROUTING -m mac --mac-source 00:90:4b:4c:0c:f9

2)is it possible to prevent the two endpoints of the ring to act as MPR?