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FlowIDBuilders.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. 5, 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
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#include <IP/FlowIDBuilders.hpp>
#include <IP/IPHeader.hpp>

#include <WNS/ldk/fun/FUN.hpp>

using namespace ip;

STATIC_FACTORY_REGISTER_WITH_CREATOR(
    OutputBuffersFlowIDBuilder,
    wns::ldk::KeyBuilder,
    "ip.outputBuffersFlowIDBuilder",
    wns::ldk::FUNConfigCreator);


OutputBuffersFlowIDBuilder::OutputBuffersFlowIDBuilder(wns::ldk::fun::FUN* _fun,
                 const wns::pyconfig::View& _config) :
    config(_config),
    fun(_fun)
{
}

void
OutputBuffersFlowIDBuilder::onFUNCreated()
{
    ipHeaderReader = this->fun->getCommandReader("ip.ipHeader");
    assure(ipHeaderReader, "No reader for the IP Header available!");
}

wns::ldk::ConstKeyPtr
OutputBuffersFlowIDBuilder::operator()(const wns::ldk::CompoundPtr& _compound, int _direction) const
{
    assure(ipHeaderReader, "No reader for the IP Header available!");

    // Only outgoing packets are separated. Incoming do not get separated and
    // especially not by the local part of the peer entity. We use Address
    // 0.0.0.0 for all incoming packets

    if(_direction == 1)
    {
        // Outgoing Packets
        IPCommand* ipHeader = ipHeaderReader->readCommand<IPCommand>(_compound->getCommandPool());
        return wns::ldk::ConstKeyPtr(new IPAddressKey(ipHeader->local.nextHop));
    }
    else
    {
        // Incoming Packets
        wns::service::nl::Address dummy;
        return wns::ldk::ConstKeyPtr(new IPAddressKey(dummy));
    }
}

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