how can I add new variable to mobile-node.h - simulation

Question

I want to add variable to mobile node class in Ns2; which this variable get initial value in TCL.
For each mobile node we assign a special value to this variable. How can i add this variable to mobile node class?

Answer 1

Go to your ns2 directory, and open mobilenode.h first. For
example if you have ns-2.35, go to
ns-allinone-2.35/ns-2.35/common/ and open it from here.
Find the line that says :
class MobileNode : public Node
and go to the last line of the public: that may look like MobileNode* prevX_; and add your variable here.
Example :
/* For list-keeper */
MobileNode* nextX_;
MobileNode* prevX_;
// My variables
int32_t NodeQueue;
protected:
Now to give them an initial value, you can open the file mobilenode.cc and fine the constructor of class mobilenode that may look like MobileNode::MobileNode(void) : and simply give your variable an initial value...
Example :
/* ======================================================================
Mobile Node
====================================================================== */
MobileNode::MobileNode(void) :
pos_handle_(this)
{
X_ = Y_ = Z_ = speed_ = 0.0;
dX_ = dY_ = dZ_ = 0.0;
destX_ = destY_ = 0.0;
random_motion_ = 0;
base_stn_ = -1;
T_ = 0;
log_target_ = 0;
next_ = 0;
radius_ = 0;
position_update_interval_ = MN_POSITION_UPDATE_INTERVAL;
position_update_time_ = 0.0;
LIST_INSERT_HEAD(&nodehead, this, link_); // node list
LIST_INIT(&ifhead_); // interface list
bind("X_", &X_);
bind("Y_", &Y_);
bind("Z_", &Z_);
bind("speed_", &speed_);
NodeQueue = 0; // Initial value
}
And then you need to cd in your ns2 directory from terminal and type make and click 'Enter'.