rdt.h

用ns写的一个网络模拟 实现rdt 里面有所有源代码和文档说明

#ifndef ns_rdt_h
#define ns_rdt_h

#include "udp.h"
#include "ip.h"

// RDT Header Structure
struct hdr_rdt {
	int ack;     // is it ack packet?
	int rej;	// is it rej packet?
	int seq;     // rdt sequence number
	int nbytes;  // bytes for rdt pkt
	double time; // current time
	int scale;   // scale (0-4) associated with data rates

	// Packet header access functions
        static int offset_;
        inline static int& offset() { return offset_; }
        inline static hdr_rdt* access(const Packet* p) {
                return (hdr_rdt*) p->access(offset_);
        }
};


// Used for Re-assemble segmented (by UDP) rdt packet
struct asm_rdt { 
	int seq;     // rdt sequence number
	int rbytes;  // currently received bytes
	int tbytes;  // total bytes to receive for rdt packet
};


// rdtAgent Class definition
class rdtAgent : public UdpAgent {
public:
	rdtAgent();
	rdtAgent(packet_t);
	virtual int supportMM() { return 1; }
	virtual void enableMM() { support_mm_ = 1; }
	virtual void sendmsg(int nbytes, const char *flags = 0);
	void recv(Packet*, Handler*);
protected:
	int support_mm_; // set to 1 if above is MmApp
private:
	asm_rdt asm_info; // packet re-assembly information
};

#endif