Hello.

I’m trying to modify the routing protocol AODV. For this cause, I add a 
member variable “energy” in the AODV class (aodv.h ) and modify it in 
aodv.cc file.
I want to recover this member variable of the class AODV which represents 
this value of energy "energy"  and to use it in  MAC_802-11.cc file and to 
decrease it in the method recvDATA but I had a bug :"Segmentation fault" at 
the execution of the programme!!. (I want to reach the same variable 
“energy” and to modify the same value in memory).
Veiled how I recovered this variable:
In  file mac_802-11.h I added:
#include "aodv/aodv.h"
............
class Mac802_11 : public Mac {
...........
friend class aodv;
public:
................
AODV *thisaodv;
...............
}

In file mac_802-11.cc I added:
void Mac802_11::recvDATA(Packet *p)
{
.............
                thisaodv->energy=thisaodv->energy-1;
..............
}

Where is the problem please. If it is possible, can you propose me other 
solutions.

Thank you in advance

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