Denial of Service in NS2

I want to create an agent in NS2 that will be able to perform DoS attack. Two Types of DoS attacks, the agent should be able to simulate: (1) SYN flooding -TCP protocol (2) UDP flooding. The rate of flooding should be dynamic entered by the users. The code should be well documented and easy to modify in future as the project is expandable. Please if you are not expert in NS2 , don't waste my time and yours.