Secure wireless ad hoc networks possess many properties that are highly valuable in e.g. emergency situations and military applications. By using X.509 certificates, the ad hoc routing protocol B.A.T.M.A.N. has been modified in order to support identification and authentication of mobile nodes trying to access a restricted ad hoc network.The new protocol design needs to be evaluated by performing tests under various conditions and environments. However, this might be a challenging and expensive task to do in a real-world system, thus it is recommended to simulate the routing protocol using a network simulator.ns-3 is an open source discrete-event network simulator for Internet systems. The goal of this thesis is to extend ns-3 to support simulation of both the original and modified B.A.T.M.A.N. protocol such that protocol design, interactions, and large-scale performance issues can be investigated and compared.