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TCP.cpp

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/*******************************************************************************
 * This file is part of openWNS (open Wireless Network Simulator)
 * _____________________________________________________________________________
 *
 * Copyright (C) 2004-2007
 * Chair of Communication Networks (ComNets)
 * Kopernikusstr. 16, D-52074 Aachen, Germany
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 * fax: ++49-241-80-22242
 * email: info@openwns.org
 * www: http://www.openwns.org
 * _____________________________________________________________________________
 *
 * openWNS is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License version 2 as published by the
 * Free Software Foundation;
 *
 * openWNS is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
 * details.
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 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
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 ******************************************************************************/

#include <SIMPLETL/service/TCP.hpp>
#include <SIMPLETL/SimpleTL.hpp>
#include <SIMPLETL/service/Connection.hpp>
#include <SIMPLETL/Routing.hpp>
#include <SIMPLETL/events/ConInd.hpp>
#include <SIMPLETL/events/DisconInd.hpp>
#include <SIMPLETL/Medium.hpp>
#include <WNS/service/tl/FlowID.hpp>
#include <WNS/service/qos/QoSClasses.hpp>
#include <WNS/module/Module.hpp>
#include <WNS/logger/Master.hpp>

using namespace simpletl;

TCP::TCP(const wns::pyconfig::View& _pyco)
    : pyco(_pyco),
      eventscheduler(wns::simulator::getEventScheduler()),
      registered(false),
      logger("SimpleTL", "TCP",
             wns::simulator::getMasterLogger())
{
    portPool = new wns::service::tl::PortPool(pyco.get<simTimeType>("portUnbindDelay"));

    wns::pyconfig::View pyco =
        wns::module::Module<SimpleTL>::getPyConfigView().getView("channel");
    channelcapacity = pyco.get<double>("capacity");
}

TCP::~TCP()
{
    delete portPool;
}

void TCP::openConnection(wns::service::tl::Port _port,
                         wns::service::nl::FQDN _source,
                         wns::service::nl::FQDN _peerInstance,
                         wns::service::qos::QoSClass /*_qosClass*/,
                         wns::service::tl::ConnectionHandler* _ch)
{
    wns::service::tl::ConnectionHandler* peerconnectionhandler =
        Routing::getService(_peerInstance, _port);

    wns::service::tl::Port sourcePort = portPool->suggestPort();
    portPool->bind(sourcePort);

    wns::service::tl::FlowID flowID ( wns::service::nl::Address(_source), sourcePort, wns::service::nl::Address(_peerInstance),_port );
    // TCP-Header: 20 Byte, IP-Header: 20 Byte -> 320 Bit
    Bit headerLength = 320;

    Connection* local = new Connection(_ch, flowID, headerLength);
    Connection* peer = new Connection(peerconnectionhandler, local->swappedFlowID(), headerLength);

    MESSAGE_SINGLE(NORMAL, logger, "Opening connection for flow ID: " << flowID);

    local->setPeer(peer);
    peer->setPeer(local);

    simTimeType delay = (double)headerLength / (1000*channelcapacity);

    Medium::send(ConInd(local), delay);
}

void TCP::closeConnection(wns::service::tl::Connection* _connection)
{
    assureType(_connection, Connection*);
    Connection* local = static_cast<Connection*>(_connection);

    // TCP-Header: 20 Byte, IP-Header: 20 Byte -> 320 Bit
    Bit headerLength = 320;
    simTimeType delay = (double)headerLength / (1000*channelcapacity);

    assure(local->getPeer(), "Peer entity not available!");
    Medium::send(DisconInd(local), delay);
}

void TCP::listenOnPort(wns::service::tl::Port _port, wns::service::tl::ConnectionHandler* _ch)
{
    wns::service::nl::FQDN domainName =
        wns::service::nl::FQDN(pyco.get<std::string>("domainName"));

    if (!registered)
    {
        Routing::registerIP(domainName);
        registered = true;
    }
    Routing::setService(domainName, _port, _ch);
}

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