satellite-isl-arbiter-unicast.cc

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2013 Magister Solutions Ltd
 * Copyright (c) 2018 CNES
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Inspired and adapted from Hypatia: https://github.com/snkas/hypatia
 *
 * Author: Bastien Tauran <bastien.tauran@viveris.fr>
 */
 
#include "satellite-isl-arbiter-unicast.h"
 
#include <iostream>
#include <map>
#include <sstream>
#include <string>
#include <utility>
#include <vector>
 
NS_LOG_COMPONENT_DEFINE("SatIslArbiterUnicast");
 
namespace ns3
{
 
NS_OBJECT_ENSURE_REGISTERED(SatIslArbiterUnicast);
 
TypeId
SatIslArbiterUnicast::GetTypeId(void)
{
    static TypeId tid = TypeId("ns3::SatIslArbiterUnicast")
                            .SetParent<SatIslArbiter>()
                            .AddConstructor<SatIslArbiterUnicast>();
    return tid;
}
 
SatIslArbiterUnicast::SatIslArbiterUnicast()
    : SatIslArbiter()
{
    NS_LOG_FUNCTION(this);
 
    NS_FATAL_ERROR("Default constructor not in use");
}
 
SatIslArbiterUnicast::SatIslArbiterUnicast(Ptr<Node> node)
    : SatIslArbiter(node)
{
    NS_LOG_FUNCTION(this << node);
}
 
SatIslArbiterUnicast::SatIslArbiterUnicast(Ptr<Node> node, std::map<uint32_t, uint32_t> nextHopMap)
    : SatIslArbiter(node)
{
    NS_LOG_FUNCTION(this << node);
    m_nextHopMap = nextHopMap;
}
 
int32_t
SatIslArbiterUnicast::Decide(int32_t sourceSatId, int32_t targetSatId, Ptr<Packet> pkt)
{
    NS_LOG_FUNCTION(this << sourceSatId << targetSatId << pkt);
 
    if (m_nextHopMap.count(targetSatId) == 0)
    {
        return -1;
    }
    return m_nextHopMap[targetSatId];
}
 
std::string
SatIslArbiterUnicast::StringReprOfForwardingState()
{
    NS_LOG_FUNCTION(this);
 
    std::ostringstream res;
    res << "Unicast state of node " << m_nodeId << std::endl;
 
    std::map<uint32_t, uint32_t>::iterator nextHopMapIterator;
 
    std::map<uint32_t, std::vector<uint32_t>> mapReversed;
    std::map<uint32_t, std::vector<uint32_t>>::iterator mapReversedIterator;
 
    for (nextHopMapIterator = m_nextHopMap.begin(); nextHopMapIterator != m_nextHopMap.end();
         nextHopMapIterator++)
    {
        if (mapReversed.count(nextHopMapIterator->second) == 0)
        {
            mapReversed[nextHopMapIterator->second] = std::vector<uint32_t>();
        }
        mapReversed[nextHopMapIterator->second].push_back(nextHopMapIterator->first);
    }
 
    for (mapReversedIterator = mapReversed.begin(); mapReversedIterator != mapReversed.end();
         mapReversedIterator++)
    {
        res << mapReversedIterator->first << "  -> : {";
        bool first = true;
        for (uint32_t targetId : mapReversedIterator->second)
        {
            if (!first)
            {
                res << ",";
            }
            res << "  " << targetId;
            first = false;
        }
        res << "}" << std::endl;
    }
 
    return res.str();
}
 
void
SatIslArbiterUnicast::AddNextHopEntry(uint32_t destinationId, uint32_t netDeviceIndex)
{
    NS_LOG_FUNCTION(this << destinationId << netDeviceIndex);
 
    m_nextHopMap.insert(std::make_pair(destinationId, netDeviceIndex));
}
 
} // namespace ns3