#include <TCPBaseAlg.h>

Inheritance diagram for TCPBaseAlgStateVariables:

Public Member Functions
	TCPBaseAlgStateVariables ()
virtual std::string	info () const
virtual std::string	detailedInfo () const
Public Attributes


int	rexmit_count
	retransmit count
simtime_t	rexmit_timeout
	current retransmission timeout (aka RTO)


uint	persist_factor
	persist factor
simtime_t	persist_timeout
	current persist timeout


uint32	snd_cwnd


uint32	rtseq
	round-trip time measurements
simtime_t	rtseq_sendtime
	time when rtseq was sent (0 if RTT measurement is not running)


simtime_t	srtt
	round-trip time estimation (Jacobson's algorithm)
simtime_t	rttvar
	variance of round-trip time


uint32	numRtos
	number of RTOs


uint32	recover
	RFC 3782 variables.
bool	firstPartialACK
	first partial acknowledgement (RFC 3782)

Detailed Description

State variables for TCPBaseAlg.

Definition at line 29 of file TCPBaseAlg.h.

Constructor & Destructor Documentation

TCPBaseAlgStateVariables::TCPBaseAlgStateVariables ( )

Definition at line 48 of file flavours/TCPBaseAlg.cc.

{
    rexmit_count = 0;
    rexmit_timeout = 3.0;

    persist_factor = 0;
    persist_timeout = 5.0;

    snd_cwnd = 0; // will be set to SMSS when connection is established

    rtseq = 0;
    rtseq_sendtime = 0;

    // Jacobson's alg: srtt must be initialized to 0, rttvar to a value which
    // will yield rto = 3s initially.
    srtt = 0;
    rttvar = 3.0/4.0;

    numRtos = 0;

    // RFC 3782, page 4:
    // "The algorithm specified in this document uses a variable "recover",
    // whose initial value is the initial send sequence number."
    recover = iss;
    firstPartialACK = false;
}

Member Function Documentation

std::string TCPBaseAlgStateVariables::detailedInfo ( void ) const [virtual]

Reimplemented from TCPStateVariables.

Reimplemented in TCPTahoeRenoFamilyStateVariables.

Definition at line 84 of file flavours/TCPBaseAlg.cc.

{
    std::stringstream out;
    out << TCPStateVariables::detailedInfo();
    out << "snd_cwnd = " << snd_cwnd << "\n";
    out << "rto = " << rexmit_timeout << "\n";
    out << "persist_timeout = " << persist_timeout << "\n";
    // TBD add others too
    return out.str();
}

std::string TCPBaseAlgStateVariables::info ( ) const [virtual]

Reimplemented from TCPStateVariables.

Reimplemented in TCPTahoeRenoFamilyStateVariables.

Definition at line 75 of file flavours/TCPBaseAlg.cc.

Referenced by TCPBaseAlg::processRexmitTimer().

{
    std::stringstream out;
    out << TCPStateVariables::info();
    out << " snd_cwnd=" << snd_cwnd;
    out << " rto=" << rexmit_timeout;
    return out.str();
}