1. Modelling and Simulation
OMNeT++

2. How to install OMNET++
Download zip file located “Intranet\Faculties\Information & Engineering Technology\Modelling and Simulation”
Unzip
In mingwenv file type
./configure
make
4) You can open OMNeT now from ide folder

3. Tictoc1.ned Tictoc 1 is a network.
It consists of 2 submodules tic and toc.
Tic and toc are instances of the same module type called Txc1
Tic’s output gate is connected to toc’s inpute gate and vice versa

4. Tictoc1.ned

5. Txc1.cc It is a simple module, it is implemented in c++.
It has to be subclassed from cSimpleModule.

6. Initialize() method: It is called at the beginning of the simulation.
It checks if it is tic, a message object(cMessage) is created and sent to the “out” gate which is the input gate of another module.

7. handleMessage(cMessage *msg) method:
After the message is sent it will be delivered to the handleMessage.
handleMessage is called whenever a messages arrives at the module.

8. Txc1.cc

9. Txc2.cc
Adding Debug Messages

10. Tictoc2.ned

11. Txc3.cc
Adding a variable

12. Tictoc4.ned How to add input parameters to the simulation?
Parameters have to be declared in the NED file

13. Txc4.cc
Read the parameter in the initialize() method

14. Tictoc5.ned
Using Inheritance

15. Tictoc5.ned

16. Txc6.cc tic and toc will hold the message before sending it back.
In the initialize method:

17. Txc6.cc
In the handleMessage method:

18. Useful Methods cMessage *copy = (cMessage *)msg->dup();
It creates duplicate messages.
Int k=intuniform(a,b)
It returns a random integer with uniform
distribution in the range[a,b].
Record-eventlog = true
It records a detailed log about your message
exchanges automatically