Doubts in qualnet

[Anjali Arunan]

have considered AODV routing protocol. To avoid  wormhole in the selected route, I considered a method.
In that method, I assume that a key, k is distributed among all the nodes and which is used for the authentication and encryption of further communication.

 In the route discovery phase, when a source send (broadcast) RREQ message and the next node will receive that RREQ(request for route discovery) . The next node who received it have to calculate a F(k) and send to the RREQ sender, where F is a function(equation).

The RREQ sender will check whether the F(k) send by the next node is valid (All nodes know both key, k and function, F). If it is valid, it is said to be authenticated. Hence the RREQ sender will consider the RREP(reply) from that authenticated next node and forward it to the source node which requested for the route discovery
If the next node is not authenticated it will consider that node to be a wormhole.Hence will not consider any RREP from that node.

After the route discovery, the nodes have to authenticate each other for packet forwarding.

Sir, I don't know how to implement it in Qualnet. Which all file I have to modify so that I can make necessary changes.How I can approach this idea in Qualnet.Will i need to make a new protocol (file) called"modified AODV".
Please do reply