tcp-fs.h

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/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
 * Copyright (c) 1997 Regents of the University of California.
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 *  This product includes software developed by the Daedalus Research
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#ifndef ns_tcp_fs_h
#define ns_tcp_fs_h

#include "tcp.h"
#include "ip.h"
#include "flags.h"
#include "random.h"
#include "template.h"
#include "tcp-fack.h"

class ResetTimer : public TimerHandler {
public: 
    ResetTimer(TcpAgent *a) : TimerHandler() { a_ = a; }
protected:
    virtual void expire(Event *e);
    TcpAgent *a_;
};

/* TCP-FS with Tahoe */
class TcpFsAgent : public virtual TcpAgent {
public:
    TcpFsAgent() : t_exact_srtt_(0), t_exact_rttvar_(0), last_recv_time_(0), 
        fs_startseq_(0), fs_endseq_(0), fs_mode_(0), count_bytes_acked_(0),
        reset_timer_(this) 
    {
        bind_bool("fast_loss_recov_", &fast_loss_recov_);
        bind_bool("fast_reset_timer_", &fast_reset_timer_);
        bind_bool("count_bytes_acked_", &count_bytes_acked_);
        bind_bool("fs_enable_", &fs_enable_);
    }

    /* helper functions */
    virtual void output_helper(Packet* pkt);
    virtual void recv_helper(Packet* pkt);
    virtual void send_helper(int maxburst);
    virtual void send_idle_helper();
    virtual void recv_newack_helper(Packet* pkt);
    virtual void partialnewack_helper(Packet*) {};

    virtual void set_rtx_timer();
    virtual void cancel_rtx_timer();
    virtual void cancel_timers();
    virtual void timeout_nonrtx(int tno);
    virtual void timeout_nonrtx_helper(int tno);
    double rtt_exact_timeout() { return (t_exact_srtt_ + 4*t_exact_rttvar_);}
protected:
    double t_exact_srtt_;
    double t_exact_rttvar_;
    double last_recv_time_;
    int fs_startseq_;
    int fs_endseq_;
    int fs_mode_;
    int fs_enable_;
    int fast_loss_recov_;
    int fast_reset_timer_;
    int count_bytes_acked_;
    ResetTimer reset_timer_;
};

/* TCP-FS with Reno */
class RenoTcpFsAgent : public RenoTcpAgent, public TcpFsAgent {
public:
    RenoTcpFsAgent() : RenoTcpAgent(), TcpFsAgent() {}

    /* helper functions */
    virtual void output_helper(Packet* pkt) {TcpFsAgent::output_helper(pkt);}
    virtual void recv_helper(Packet* pkt) {TcpFsAgent::recv_helper(pkt);}
    virtual void send_helper(int maxburst) {TcpFsAgent::send_helper(maxburst);}
    virtual void send_idle_helper() {TcpFsAgent::send_idle_helper();}
    virtual void recv_newack_helper(Packet* pkt) {TcpFsAgent::recv_newack_helper(pkt);}

    virtual void set_rtx_timer() {TcpFsAgent::set_rtx_timer();}
    virtual void cancel_rtx_timer() {TcpFsAgent::cancel_rtx_timer();}
    virtual void cancel_timers(){TcpFsAgent::cancel_timers();}
    virtual void timeout_nonrtx(int tno) {TcpFsAgent::timeout_nonrtx(tno);}
    virtual void timeout_nonrtx_helper(int tno);
};

/* TCP-FS with NewReno */
class NewRenoTcpFsAgent : public virtual NewRenoTcpAgent, public TcpFsAgent {
public:
    NewRenoTcpFsAgent() : NewRenoTcpAgent(), TcpFsAgent() {}

    /* helper functions */
    virtual void output_helper(Packet* pkt) {TcpFsAgent::output_helper(pkt);}
    virtual void recv_helper(Packet* pkt) {TcpFsAgent::recv_helper(pkt);}
    virtual void send_helper(int maxburst) {TcpFsAgent::send_helper(maxburst);}
    virtual void send_idle_helper() {TcpFsAgent::send_idle_helper();}
    virtual void recv_newack_helper(Packet* pkt) {TcpFsAgent::recv_newack_helper(pkt);}
    virtual void partialnewack_helper(Packet* pkt);

    virtual void set_rtx_timer() {TcpFsAgent::set_rtx_timer();}
    virtual void cancel_rtx_timer() {TcpFsAgent::cancel_rtx_timer();}
    virtual void cancel_timers(){TcpFsAgent::cancel_timers();}
    virtual void timeout_nonrtx(int tno) {TcpFsAgent::timeout_nonrtx(tno);}
    virtual void timeout_nonrtx_helper(int tno);
};

#ifdef USE_FACK
/* TCP-FS with Fack */
class FackTcpFsAgent : public FackTcpAgent, public TcpFsAgent {
public:
    FackTcpFsAgent() : FackTcpAgent(), TcpFsAgent() {}

    /* helper functions */
    virtual void output_helper(Packet* pkt) {TcpFsAgent::output_helper(pkt);}
    virtual void recv_helper(Packet* pkt) {TcpFsAgent::recv_helper(pkt);}
    virtual void send_helper(int maxburst);
    virtual void send_idle_helper() {TcpFsAgent::send_idle_helper();}
    virtual void recv_newack_helper(Packet* pkt) {TcpFsAgent::recv_newack_helper(pkt);}
    virtual void set_rtx_timer() {TcpFsAgent::set_rtx_timer();}
    virtual void cancel_rtx_timer() {TcpFsAgent::cancel_rtx_timer();}
    virtual void cancel_timers(){TcpFsAgent::cancel_timers();}
    virtual void timeout_nonrtx(int tno) {TcpFsAgent::timeout_nonrtx(tno);}
    virtual void timeout_nonrtx_helper(int tno);
};
#endif

#endif

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