telnet.cc

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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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 *    must display the following acknowledgement:
 *  This product includes software developed by the Daedalus Research
 *  Group at the University of California Berkeley.
 * 4. Neither the name of the University nor of the Laboratory may be used
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 * @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/apps/telnet.cc,v 1.5 1998/08/14 20:09:33 tomh Exp $
 */

#include "random.h"
#include "tcp.h"
#include "telnet.h"

extern double tcplib_telnet_interarrival();

static class TelnetAppClass : public TclClass {
 public:
    TelnetAppClass() : TclClass("Application/Telnet") {}
    TclObject* create(int, const char*const*) {
        return (new TelnetApp);
    }
} class_app_telnet;


TelnetApp::TelnetApp() : running_(0), timer_(this)
{
    bind("interval_", &interval_);
}


void TelnetAppTimer::expire(Event*)
{
        t_->timeout();
}


void TelnetApp::start()
{
        running_ = 1;
    double t = next();
    timer_.sched(t);
}

void TelnetApp::stop()
{
        running_ = 0;
}

void TelnetApp::timeout()
{
        if (running_) {
            /* call the TCP advance method */
        agent_->sendmsg(agent_->size());
        /* reschedule the timer */
        double t = next();
        timer_.resched(t);
    }
}

double TelnetApp::next()
{
        if (interval_ == 0)
            /* use tcplib */
            return tcplib_telnet_interarrival();
    else
            return Random::exponential() * interval_;
}

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