ICT259: Write an OMNET++ Program Where There Are 5 Nodes Connected to a Hub: Computer Networking Assignment, SUSS, Singapore

Assignment Brief:

I would like to write an OMNET++ program where there are 5 nodes connected to a hub. The requirements are each node will send 10 messages per second to the hub. Upon receiving the message, the hub will forward the message to all nodes except the sender. I have written Hub. cc. The content of Hub. cc is as below:
#include<omnetpp.h>
class Hub: a public simple module
{
protected:
virtual void initialize();
virtual void
handleMessage(cMessage *msg);
virtual void finish();
};
Define_Module(Hub);
void Hub::handleMessage(cMessage *msg)
{
cGate *g= msg->getArrivalGate();
int i;
for(i=0;i<g->size();i++)
{
if(i!=g->getIndex())
send(msg->dup(),”out”,i);
}
}
And I have created the Hub. ned file with the content as below:
Simple Hub
{
gates:
input in[];
output out[];
}
I have created Net2.ned with contents as below:
network Net2
{ parameters:
int n_nodes;
submodules:
hub: Hub;
node[n_nodes]: Node ;
connections:
for i=0..n_nodes-1
{
node[i].out –> hub.in++;
hub.out++ –> node[i].in;
}
}
I have created omnetpp2.ini and added the following code to this file:
**.n_nodes = 5