Ns2 programs are generated in Tcl programs.
Basics of Tcl programs:
- Initialization and termination aspects of network simulator
- Define the network nodes, links, queues, and topology as well
- Define the agents and their applications
- Generation of NAM (Network Animator)
- Tracing
- This is the sample code for how to create a header file for multimedia application and define header class.
//multimedia header structure
Struct hdr_mm{
int ack;
int seq;
int nbytes;
double time;
int scale;
//packet header access functions
static int offset_;
inline statuc int& offset() {return offset_;}
inline static hdr_mm* access (const Packet* p) {
returen (hdr_mm*) p access(offset_);
}
};
\\ Multimedia Header class
static class MultimediaHeaderClass : public PacketHeaderClass {
public:
MultimediaHeaderClass() : PacketHeaderClass(“PacketHeader/Multimedia”, sizeof(hdr_mm)) {
Bind_offset(&hdr_mm::offset_);
}
}class_mmhdr;
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