Layer Model of the Simulator Kernel

The simulator kernel is internally structured in three layers. Each higher layer represents a higher level of abstraction and is based on the layers below.

• The bottom layer is the SNNS memory management. It sits on top of the Unix memory management and offers functions to allocate and free data structures for the layer above.

• The next layer contains all functions to operate on, and to modify the network as well as propagation functions.

• The interface functions for the graphical user interface are located in the topmost layer.

• In the same layer as the function interface, there exists a file interface to the Nessus compiler.

In chapter the data structures are described in detail. The description of the compiler interface can be found in appendix A.