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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/ndn-pit.h"
#include "ns3/ndn-pit-entry.h"
#include "ns3/ndn-interest-header.h"
#include "ns3/ndn-content-object-header.h"
#include "ns3/ndn-pit.h"
#include "ns3/ndn-fib.h"
#include "ns3/ndn-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 ("ndn.fw.GreenYellowRed");
namespace ns3 {
namespace ndn {
namespace fw {
NS_OBJECT_ENSURE_REGISTERED (GreenYellowRed);
TypeId
GreenYellowRed::GetTypeId (void)
{
static TypeId tid = TypeId ("ns3::ndn::fw::GreenYellowRed")
.SetGroupName ("Ndn")
.SetParent<Nacks> ()
;
return tid;
}
bool
GreenYellowRed::DoPropagateInterest (const Ptr<Face> &incomingFace,
Ptr<InterestHeader> header,
const Ptr<const Packet> &packet,
Ptr<pit::Entry> pitEntry)
{
NS_LOG_FUNCTION (this);
NS_ASSERT_MSG (m_pit != 0, "PIT should be aggregated with forwarding strategy");
int propagatedCount = 0;
BOOST_FOREACH (const fib::FaceMetric &metricFace, pitEntry->GetFibEntry ()->m_faces.get<fib::i_metric> ())
{
if (metricFace.m_status == fib::FaceMetric::NDN_FIB_RED ||
metricFace.m_status == fib::FaceMetric::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
if (!WillSendOutInterest (metricFace.m_face, header, pitEntry))
{
continue;
}
//transmission
Ptr<Packet> packetToSend = packet->Copy ();
metricFace.m_face->Send (packetToSend);
DidSendOutInterest (metricFace.m_face, header, packet, pitEntry);
propagatedCount++;
break; // propagate only one interest
}
return propagatedCount > 0;
}
void
GreenYellowRed::WillSatisfyPendingInterest (const Ptr<Face> &incomingFace,
Ptr<pit::Entry> pitEntry)
{
if (incomingFace != 0)
{
// Update metric status for the incoming interface in the corresponding FIB entry
pitEntry->GetFibEntry ()->UpdateStatus (incomingFace, fib::FaceMetric::NDN_FIB_GREEN);
}
super::WillSatisfyPendingInterest (incomingFace, pitEntry);
}
void
GreenYellowRed::DidReceiveValidNack (const Ptr<Face> &incomingFace,
uint32_t nackCode,
Ptr<pit::Entry> pitEntry)
{
super::DidReceiveValidNack (incomingFace, nackCode, pitEntry);
if (incomingFace != 0 &&
nackCode != InterestHeader::NACK_LOOP)
{
pitEntry->GetFibEntry ()->UpdateStatus (incomingFace, fib::FaceMetric::NDN_FIB_YELLOW);
}
}
} // namespace fw
} // namespace ndn
} // namespace ns3