#include <TCPConnection_old.h>

Inheritance diagram for tcp_old::TCPStateVariables:

Public Member Functions
	TCPStateVariables ()
virtual std::string	info () const
virtual std::string	detailedInfo () const
Public Attributes
bool	active
bool	fork
uint	snd_mss
uint32	snd_una
uint32	snd_nxt
uint32	snd_max
uint	snd_wnd
uint32	snd_up
uint32	snd_wl1
uint32	snd_wl2
uint32	iss
uint32	rcv_nxt
uint32	rcv_wnd
uint32	rcv_up
uint32	irs
short	dupacks
int	syn_rexmit_count
simtime_t	syn_rexmit_timeout
bool	fin_ack_rcvd
bool	send_fin
uint32	snd_fin_seq
bool	fin_rcvd
uint32	rcv_fin_seq
bool	afterRto
uint32	last_ack_sent

Detailed Description

Contains state variables ("TCB") for TCP.

TCPStateVariables is effectively a "struct" -- it only contains public data members. (Only declared as a class so that we can use cPolymorphic as base class and make it possible to inspect it in Tkenv.)

TCPStateVariables only contains variables needed to implement the "base" (RFC 793) TCP. More advanced TCP variants are encapsulated into TCPAlgorithm subclasses which can have their own state blocks, subclassed from TCPStateVariables. See TCPAlgorithm::createStateVariables().

Definition at line 147 of file TCPConnection_old.h.

Constructor & Destructor Documentation

TCPStateVariables::TCPStateVariables ( )

Definition at line 31 of file old/TCPConnectionBase.cc.

{
    // set everything to 0 -- real init values will be set manually
    active = false;
    fork = false;
    snd_mss = -1; // will be set from configureStateVariables()
    snd_una = 0;
    snd_nxt = 0;
    snd_max = 0;
    snd_wnd = 0;
    snd_up = 0;
    snd_wl1 = 0;
    snd_wl2 = 0;
    iss = 0;
    rcv_nxt = 0;
    rcv_wnd = -1; // will be set from configureStateVariables()
    rcv_up = 0;
    irs = 0;

    dupacks = 0;

    syn_rexmit_count = 0;
    syn_rexmit_timeout = 0;

    fin_ack_rcvd = false;
    send_fin = false;
    snd_fin_seq = 0;
    fin_rcvd = false;
    rcv_fin_seq = 0;
    afterRto = false;

    last_ack_sent = 0;
}

Member Function Documentation

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

Reimplemented in tcp_old::TCPBaseAlgStateVariables, and tcp_old::TCPTahoeRenoFamilyStateVariables.

Definition at line 77 of file old/TCPConnectionBase.cc.

{
    std::stringstream out;
    out << "active = " << active << "\n";
    out << "snd_mss = " << snd_mss << "\n";
    out << "snd_una = " << snd_una << "\n";
    out << "snd_nxt = " << snd_nxt << "\n";
    out << "snd_max = " << snd_max << "\n";
    out << "snd_wnd = " << snd_wnd << "\n";
    out << "snd_up = " << snd_up << "\n";
    out << "snd_wl1 = " << snd_wl1 << "\n";
    out << "snd_wl2 = " << snd_wl2 << "\n";
    out << "iss = " << iss << "\n";
    out << "rcv_nxt = " << rcv_nxt << "\n";
    out << "rcv_wnd = " << rcv_wnd << "\n";
    out << "rcv_up = " << rcv_up << "\n";
    out << "irs = " << irs << "\n";
    out << "fin_ack_rcvd = " << fin_ack_rcvd << "\n";
    return out.str();
}

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

Reimplemented in tcp_old::TCPBaseAlgStateVariables, and tcp_old::TCPTahoeRenoFamilyStateVariables.

Definition at line 65 of file old/TCPConnectionBase.cc.

Referenced by tcp_old::TCPConnection::process_RCV_SEGMENT().

{
    std::stringstream out;
    out <<  "snd_una=" << snd_una;
    out << " snd_nxt=" << snd_nxt;
    out << " snd_max=" << snd_max;
    out << " snd_wnd=" << snd_wnd;
    out << " rcv_nxt=" << rcv_nxt;
    out << " rcv_wnd=" << rcv_wnd;
    return out.str();
}