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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2011 University of California, Los Angeles
*
* 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
*
* Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
* Ilya Moiseenko <iliamo@cs.ucla.edu>
*/
#include "green-yellow-red.h"
#include "ns3/ccnx-pit.h"
#include "ns3/ccnx-pit-entry.h"
#include "ns3/ccnx-interest-header.h"
#include "ns3/ccnx-content-object-header.h"
#include "ns3/ccnx-pit.h"
#include "ns3/ccnx-fib.h"
#include "ns3/ccnx-content-store.h"
#include "ns3/assert.h"
#include "ns3/ptr.h"
#include "ns3/log.h"
#include "ns3/simulator.h"
#include "ns3/boolean.h"
#include "ns3/string.h"
#include <boost/ref.hpp>
#include <boost/foreach.hpp>
#include <boost/lambda/lambda.hpp>
#include <boost/lambda/bind.hpp>
#include <boost/tuple/tuple.hpp>
namespace ll = boost::lambda;
NS_LOG_COMPONENT_DEFINE ("NdnSimGreenYellowRed");
namespace ns3 {
using namespace __ccnx_private;
namespace ndnSIM {
NS_OBJECT_ENSURE_REGISTERED (GreenYellowRed);
TypeId
GreenYellowRed::GetTypeId (void)
{
static TypeId tid = TypeId ("ns3::ndnSIM::GreenYellowRed")
.SetGroupName ("Ccnx")
.SetParent<Nacks> ()
;
return tid;
}
bool
GreenYellowRed::DoPropagateInterest (const Ptr<CcnxFace> &incomingFace,
Ptr<CcnxInterestHeader> &header,
const Ptr<const Packet> &packet,
Ptr<CcnxPitEntry> pitEntry)
{
NS_LOG_FUNCTION (this);
NS_ASSERT_MSG (m_pit != 0, "PIT should be aggregated with forwarding strategy");
int propagatedCount = 0;
BOOST_FOREACH (const CcnxFibFaceMetric &metricFace, pitEntry->GetFibEntry ()->m_faces.get<i_metric> ())
{
if (metricFace.m_status == CcnxFibFaceMetric::NDN_FIB_RED ||
metricFace.m_status == CcnxFibFaceMetric::NDN_FIB_YELLOW)
break; //propagate only to green faces
if (pitEntry->GetIncoming ().find (metricFace.m_face) != pitEntry->GetIncoming ().end ())
continue; // don't forward to face that we received interest from
CcnxPitEntryOutgoingFaceContainer::type::iterator outgoing =
pitEntry->GetOutgoing ().find (metricFace.m_face);
if (outgoing != pitEntry->GetOutgoing ().end () &&
outgoing->m_retxCount >= pitEntry->GetMaxRetxCount ())
{
NS_LOG_DEBUG ("retxCount: " << outgoing->m_retxCount << ", maxRetxCount: " << pitEntry->GetMaxRetxCount ());
continue;
}
bool faceAvailable = metricFace.m_face->IsBelowLimit ();
if (!faceAvailable) // huh...
{
// let's try different green face
continue;
}
pitEntry->AddOutgoing (metricFace.m_face);
Ptr<Packet> packetToSend = packet->Copy ();
//transmission
metricFace.m_face->Send (packetToSend);
m_outInterests (header, metricFace.m_face);
propagatedCount++;
break; // propagate only one interest
}
return propagatedCount > 0;
}
void
GreenYellowRed::WillSatisfyPendingInterest (const Ptr<CcnxFace> &incomingFace,
Ptr<CcnxPitEntry> pitEntry)
{
// Update metric status for the incoming interface in the corresponding FIB entry
pitEntry->GetFibEntry ()->UpdateStatus (incomingFace, CcnxFibFaceMetric::NDN_FIB_GREEN);
super::WillSatisfyPendingInterest (incomingFace, pitEntry);
}
void
GreenYellowRed::DidReceiveValidNack (const Ptr<CcnxFace> &incomingFace,
uint32_t nackCode,
Ptr<CcnxPitEntry> pitEntry)
{
super::DidReceiveValidNack (incomingFace, nackCode, pitEntry);
if (nackCode != CcnxInterestHeader::NACK_LOOP)
{
pitEntry->GetFibEntry ()->UpdateStatus (incomingFace, CcnxFibFaceMetric::NDN_FIB_YELLOW);
}
}
} // namespace ndnSIM
} // namespace ns3