src/face.cpp - ndnSIM/ndn-cxx - Gitiles

 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
  * Copyright (c) 2013-2017 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
  * ndn-cxx library is free software: you can redistribute it and/or modify it under the
  * terms of the GNU Lesser General Public License as published by the Free Software
  * Foundation, either version 3 of the License, or (at your option) any later version.
  *
  * ndn-cxx library 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.
  *
  * You should have received copies of the GNU General Public License and GNU Lesser
  * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
  * <http://www.gnu.org/licenses/>.
  *
  * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
  */

 #include "face.hpp"
 #include "detail/face-impl.hpp"

 #include "encoding/tlv.hpp"
 #include "net/face-uri.hpp"
 #include "security/signing-helpers.hpp"
 #include "util/random.hpp"
 #include "util/time.hpp"

 #include "ns3/node-list.h"
 #include "ns3/ndnSIM/helper/ndn-stack-helper.hpp"
 #include "ns3/ndnSIM/NFD/daemon/face/generic-link-service.hpp"
 #include "ns3/ndnSIM/NFD/daemon/face/internal-transport.hpp"

 // NDN_LOG_INIT(ndn.Face) is declared in face-impl.hpp

 // A callback scheduled through io.post and io.dispatch may be invoked after the face
 // is destructed. To prevent this situation, these macros captures Face::m_impl as weak_ptr,
 // and skips callback execution if the face has been destructed.

 #define IO_CAPTURE_WEAK_IMPL(OP) \
   { \
     weak_ptr<Impl> implWeak(m_impl); \
     m_impl->m_scheduler.scheduleEvent(time::seconds(0), [=] { \
       auto impl = implWeak.lock(); \
       if (impl != nullptr) {
 #define IO_CAPTURE_WEAK_IMPL_END \
       } \
     }); \
   }

 namespace ndn {

 Face::OversizedPacketError::OversizedPacketError(char pktType, const Name& name, size_t wireSize)
   : Error((pktType == 'I' ? "Interest " : pktType == 'D' ? "Data " : "Nack ") +
           name.toUri() + " encodes into " + to_string(wireSize) + " octets, "
           "exceeding the implementation limit of " + to_string(MAX_NDN_PACKET_SIZE) + " octets")
   , pktType(pktType)
   , name(name)
   , wireSize(wireSize)
 {
 }

 Face::Face(shared_ptr<Transport> transport)
   : m_impl(new Impl(*this))
 {
   construct(transport, ns3::ndn::StackHelper::getKeyChain());
 }

 Face::Face(boost::asio::io_service& ioService)
   : m_impl(new Impl(*this))
 {
   construct(nullptr, ns3::ndn::StackHelper::getKeyChain());
 }

 Face::Face(shared_ptr<Transport> transport, KeyChain& keyChain)
   : m_impl(new Impl(*this))
 {
   construct(std::move(transport), keyChain);
 }

 Face::Face(shared_ptr<Transport> transport, boost::asio::io_service& ioService)
   : m_impl(new Impl(*this))
 {
   construct(transport, ns3::ndn::StackHelper::getKeyChain());
 }

 Face::Face(shared_ptr<Transport> transport, boost::asio::io_service& ioService, KeyChain& keyChain)
   : m_impl(new Impl(*this))
 {
   construct(std::move(transport), keyChain);
 }

 shared_ptr<Transport>
 Face::makeDefaultTransport()
 {
   ns3::Ptr<ns3::Node> node = ns3::NodeList::GetNode(ns3::Simulator::GetContext());
   NS_ASSERT_MSG(node->GetObject<ns3::ndn::L3Protocol>() != 0,
                 "NDN stack should be installed on the node " << node);

   auto uri = ::nfd::FaceUri("ndnFace://" + boost::lexical_cast<std::string>(node->GetId()));

   ::nfd::face::GenericLinkService::Options serviceOpts;
   serviceOpts.allowLocalFields = true;

   auto nfdFace = make_shared<::nfd::Face>(make_unique<::nfd::face::GenericLinkService>(serviceOpts),
                                           make_unique<::nfd::face::InternalForwarderTransport>(uri, uri));
   auto forwarderTransport = static_cast<::nfd::face::InternalForwarderTransport*>(nfdFace->getTransport());

   auto clientTransport = make_shared<::nfd::face::InternalClientTransport>();
   clientTransport->connectToForwarder(forwarderTransport);

   node->GetObject<ns3::ndn::L3Protocol>()->addFace(nfdFace);;

   return clientTransport;
 }

 void
 Face::construct(shared_ptr<Transport> transport, KeyChain& keyChain)
 {
   if (transport == nullptr) {
     transport = makeDefaultTransport();
   }
   BOOST_ASSERT(transport != nullptr);
   m_transport = std::move(transport);

   m_nfdController = make_unique<nfd::Controller>(*this, keyChain);

   IO_CAPTURE_WEAK_IMPL(post) {
     impl->ensureConnected(false);
   } IO_CAPTURE_WEAK_IMPL_END
 }

 Face::~Face() = default;

 shared_ptr<Transport>
 Face::getTransport()
 {
   return m_transport;
 }

 const PendingInterestId*
 Face::expressInterest(const Interest& interest,
                       const DataCallback& afterSatisfied,
                       const NackCallback& afterNacked,
                       const TimeoutCallback& afterTimeout)
 {
   shared_ptr<Interest> interest2 = make_shared<Interest>(interest);
   interest2->getNonce();

   IO_CAPTURE_WEAK_IMPL(dispatch) {
     impl->asyncExpressInterest(interest2, afterSatisfied, afterNacked, afterTimeout);
   } IO_CAPTURE_WEAK_IMPL_END

   return reinterpret_cast<const PendingInterestId*>(interest2.get());
 }

 void
 Face::removePendingInterest(const PendingInterestId* pendingInterestId)
 {
   IO_CAPTURE_WEAK_IMPL(post) {
     impl->asyncRemovePendingInterest(pendingInterestId);
   } IO_CAPTURE_WEAK_IMPL_END
 }

 void
 Face::removeAllPendingInterests()
 {
   IO_CAPTURE_WEAK_IMPL(post) {
     impl->asyncRemoveAllPendingInterests();
   } IO_CAPTURE_WEAK_IMPL_END
 }

 size_t
 Face::getNPendingInterests() const
 {
   return m_impl->m_pendingInterestTable.size();
 }

 void
 Face::put(Data data)
 {
   IO_CAPTURE_WEAK_IMPL(dispatch) {
     impl->asyncPutData(data);
   } IO_CAPTURE_WEAK_IMPL_END
 }

 void
 Face::put(lp::Nack nack)
 {
   IO_CAPTURE_WEAK_IMPL(dispatch) {
     impl->asyncPutNack(nack);
   } IO_CAPTURE_WEAK_IMPL_END
 }

 const RegisteredPrefixId*
 Face::setInterestFilter(const InterestFilter& interestFilter,
                         const InterestCallback& onInterest,
                         const RegisterPrefixFailureCallback& onFailure,
                         const security::SigningInfo& signingInfo,
                         uint64_t flags)
 {
   return setInterestFilter(interestFilter, onInterest, nullptr, onFailure, signingInfo, flags);
 }

 const RegisteredPrefixId*
 Face::setInterestFilter(const InterestFilter& interestFilter,
                         const InterestCallback& onInterest,
                         const RegisterPrefixSuccessCallback& onSuccess,
                         const RegisterPrefixFailureCallback& onFailure,
                         const security::SigningInfo& signingInfo,
                         uint64_t flags)
 {
   auto filter = make_shared<InterestFilterRecord>(interestFilter, onInterest);

   nfd::CommandOptions options;
   options.setSigningInfo(signingInfo);

   return m_impl->registerPrefix(interestFilter.getPrefix(), filter,
                                 onSuccess, onFailure, flags, options);
 }

 const InterestFilterId*
 Face::setInterestFilter(const InterestFilter& interestFilter,
                         const InterestCallback& onInterest)
 {
   auto filter = make_shared<InterestFilterRecord>(interestFilter, onInterest);

   IO_CAPTURE_WEAK_IMPL(post) {
     impl->asyncSetInterestFilter(filter);
   } IO_CAPTURE_WEAK_IMPL_END

   return reinterpret_cast<const InterestFilterId*>(filter.get());
 }

 const RegisteredPrefixId*
 Face::registerPrefix(const Name& prefix,
                      const RegisterPrefixSuccessCallback& onSuccess,
                      const RegisterPrefixFailureCallback& onFailure,
                      const security::SigningInfo& signingInfo,
                      uint64_t flags)
 {
   nfd::CommandOptions options;
   options.setSigningInfo(signingInfo);

   return m_impl->registerPrefix(prefix, nullptr, onSuccess, onFailure, flags, options);
 }

 void
 Face::unsetInterestFilter(const RegisteredPrefixId* registeredPrefixId)
 {
   IO_CAPTURE_WEAK_IMPL(post) {
     impl->asyncUnregisterPrefix(registeredPrefixId, nullptr, nullptr);
   } IO_CAPTURE_WEAK_IMPL_END
 }

 void
 Face::unsetInterestFilter(const InterestFilterId* interestFilterId)
 {
   IO_CAPTURE_WEAK_IMPL(post) {
     impl->asyncUnsetInterestFilter(interestFilterId);
   } IO_CAPTURE_WEAK_IMPL_END
 }

 void
 Face::unregisterPrefix(const RegisteredPrefixId* registeredPrefixId,
                        const UnregisterPrefixSuccessCallback& onSuccess,
                        const UnregisterPrefixFailureCallback& onFailure)
 {
   IO_CAPTURE_WEAK_IMPL(post) {
     impl->asyncUnregisterPrefix(registeredPrefixId, onSuccess, onFailure);
   } IO_CAPTURE_WEAK_IMPL_END
 }

 void
 Face::doProcessEvents(time::milliseconds timeout, bool keepThread)
 {
 }

 void
 Face::shutdown()
 {
   IO_CAPTURE_WEAK_IMPL(post) {
     this->asyncShutdown();
   } IO_CAPTURE_WEAK_IMPL_END
 }

 void
 Face::asyncShutdown()
 {
   m_impl->m_pendingInterestTable.clear();
   m_impl->m_registeredPrefixTable.clear();

   if (m_transport->isConnected())
     m_transport->close();
 }

 /**
  * @brief extract local fields from NDNLPv2 packet and tag onto a network layer packet
  */
 template<typename NetPkt>
 static void
 extractLpLocalFields(NetPkt& netPacket, const lp::Packet& lpPacket)
 {
   addTagFromField<lp::IncomingFaceIdTag, lp::IncomingFaceIdField>(netPacket, lpPacket);
   addTagFromField<lp::CongestionMarkTag, lp::CongestionMarkField>(netPacket, lpPacket);

   if (lpPacket.has<lp::HopCountTagField>()) {
     netPacket.setTag(make_shared<lp::HopCountTag>(lpPacket.get<lp::HopCountTagField>() + 1));
   }
 }

 void
 Face::onReceiveElement(const Block& blockFromDaemon)
 {
   lp::Packet lpPacket(blockFromDaemon); // bare Interest/Data is a valid lp::Packet,
                                         // no need to distinguish

   Buffer::const_iterator begin, end;
   std::tie(begin, end) = lpPacket.get<lp::FragmentField>();
   Block netPacket(&*begin, std::distance(begin, end));
   switch (netPacket.type()) {
     case tlv::Interest: {
       auto interest = make_shared<Interest>(netPacket);
       if (lpPacket.has<lp::NackField>()) {
         auto nack = make_shared<lp::Nack>(std::move(*interest));
         nack->setHeader(lpPacket.get<lp::NackField>());
         extractLpLocalFields(*nack, lpPacket);
         NDN_LOG_DEBUG(">N " << nack->getInterest() << '~' << nack->getHeader().getReason());
         m_impl->nackPendingInterests(*nack);
       }
       else {
         extractLpLocalFields(*interest, lpPacket);
         NDN_LOG_DEBUG(">I " << *interest);
         m_impl->processIncomingInterest(std::move(interest));
       }
       break;
     }
     case tlv::Data: {
       auto data = make_shared<Data>(netPacket);
       extractLpLocalFields(*data, lpPacket);
       NDN_LOG_DEBUG(">D " << data->getName());
       m_impl->satisfyPendingInterests(*data);
       break;
     }
   }
 }

 } // namespace ndn
	/* -- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -- */
	/*
	* Copyright (c) 2013-2017 Regents of the University of California.
	*
	* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
	*
	* ndn-cxx library is free software: you can redistribute it and/or modify it under the
	* terms of the GNU Lesser General Public License as published by the Free Software
	* Foundation, either version 3 of the License, or (at your option) any later version.
	*
	* ndn-cxx library 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.
	*
	* You should have received copies of the GNU General Public License and GNU Lesser
	* General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
	* <http://www.gnu.org/licenses/>.
	*
	* See AUTHORS.md for complete list of ndn-cxx authors and contributors.
	*/

	#include "face.hpp"
	#include "detail/face-impl.hpp"

	#include "encoding/tlv.hpp"
	#include "net/face-uri.hpp"
	#include "security/signing-helpers.hpp"
	#include "util/random.hpp"
	#include "util/time.hpp"

	#include "ns3/node-list.h"
	#include "ns3/ndnSIM/helper/ndn-stack-helper.hpp"
	#include "ns3/ndnSIM/NFD/daemon/face/generic-link-service.hpp"
	#include "ns3/ndnSIM/NFD/daemon/face/internal-transport.hpp"

	// NDN_LOG_INIT(ndn.Face) is declared in face-impl.hpp

	// A callback scheduled through io.post and io.dispatch may be invoked after the face
	// is destructed. To prevent this situation, these macros captures Face::m_impl as weak_ptr,
	// and skips callback execution if the face has been destructed.

	#define IO_CAPTURE_WEAK_IMPL(OP) \
	{ \
	weak_ptr<Impl> implWeak(m_impl); \
	m_impl->m_scheduler.scheduleEvent(time::seconds(0), [=] { \
	auto impl = implWeak.lock(); \
	if (impl != nullptr) {
	#define IO_CAPTURE_WEAK_IMPL_END \
	} \
	}); \
	}

	namespace ndn {

	Face::OversizedPacketError::OversizedPacketError(char pktType, const Name& name, size_t wireSize)
	: Error((pktType == 'I' ? "Interest " : pktType == 'D' ? "Data " : "Nack ") +
	name.toUri() + " encodes into " + to_string(wireSize) + " octets, "
	"exceeding the implementation limit of " + to_string(MAX_NDN_PACKET_SIZE) + " octets")
	, pktType(pktType)
	, name(name)
	, wireSize(wireSize)
	{
	}

	Face::Face(shared_ptr<Transport> transport)
	: m_impl(new Impl(*this))
	{
	construct(transport, ns3::ndn::StackHelper::getKeyChain());
	}

	Face::Face(boost::asio::io_service& ioService)
	: m_impl(new Impl(*this))
	{
	construct(nullptr, ns3::ndn::StackHelper::getKeyChain());
	}

	Face::Face(shared_ptr<Transport> transport, KeyChain& keyChain)
	: m_impl(new Impl(*this))
	{
	construct(std::move(transport), keyChain);
	}

	Face::Face(shared_ptr<Transport> transport, boost::asio::io_service& ioService)
	: m_impl(new Impl(*this))
	{
	construct(transport, ns3::ndn::StackHelper::getKeyChain());
	}

	Face::Face(shared_ptr<Transport> transport, boost::asio::io_service& ioService, KeyChain& keyChain)
	: m_impl(new Impl(*this))
	{
	construct(std::move(transport), keyChain);
	}

	shared_ptr<Transport>
	Face::makeDefaultTransport()
	{
	ns3::Ptr<ns3::Node> node = ns3::NodeList::GetNode(ns3::Simulator::GetContext());
	NS_ASSERT_MSG(node->GetObject<ns3::ndn::L3Protocol>() != 0,
	"NDN stack should be installed on the node " << node);

	auto uri = ::nfd::FaceUri("ndnFace://" + boost::lexical_cast<std::string>(node->GetId()));

	::nfd::face::GenericLinkService::Options serviceOpts;
	serviceOpts.allowLocalFields = true;

	auto nfdFace = make_shared<::nfd::Face>(make_unique<::nfd::face::GenericLinkService>(serviceOpts),
	make_unique<::nfd::face::InternalForwarderTransport>(uri, uri));
	auto forwarderTransport = static_cast<::nfd::face::InternalForwarderTransport*>(nfdFace->getTransport());

	auto clientTransport = make_shared<::nfd::face::InternalClientTransport>();
	clientTransport->connectToForwarder(forwarderTransport);

	node->GetObject<ns3::ndn::L3Protocol>()->addFace(nfdFace);;

	return clientTransport;
	}

	void
	Face::construct(shared_ptr<Transport> transport, KeyChain& keyChain)
	{
	if (transport == nullptr) {
	transport = makeDefaultTransport();
	}
	BOOST_ASSERT(transport != nullptr);
	m_transport = std::move(transport);

	m_nfdController = make_unique<nfd::Controller>(*this, keyChain);

	IO_CAPTURE_WEAK_IMPL(post) {
	impl->ensureConnected(false);
	} IO_CAPTURE_WEAK_IMPL_END
	}

	Face::~Face() = default;

	shared_ptr<Transport>
	Face::getTransport()
	{
	return m_transport;
	}

	const PendingInterestId*
	Face::expressInterest(const Interest& interest,
	const DataCallback& afterSatisfied,
	const NackCallback& afterNacked,
	const TimeoutCallback& afterTimeout)
	{
	shared_ptr<Interest> interest2 = make_shared<Interest>(interest);
	interest2->getNonce();

	IO_CAPTURE_WEAK_IMPL(dispatch) {
	impl->asyncExpressInterest(interest2, afterSatisfied, afterNacked, afterTimeout);
	} IO_CAPTURE_WEAK_IMPL_END

	return reinterpret_cast<const PendingInterestId*>(interest2.get());
	}

	void
	Face::removePendingInterest(const PendingInterestId* pendingInterestId)
	{
	IO_CAPTURE_WEAK_IMPL(post) {
	impl->asyncRemovePendingInterest(pendingInterestId);
	} IO_CAPTURE_WEAK_IMPL_END
	}

	void
	Face::removeAllPendingInterests()
	{
	IO_CAPTURE_WEAK_IMPL(post) {
	impl->asyncRemoveAllPendingInterests();
	} IO_CAPTURE_WEAK_IMPL_END
	}

	size_t
	Face::getNPendingInterests() const
	{
	return m_impl->m_pendingInterestTable.size();
	}

	void
	Face::put(Data data)
	{
	IO_CAPTURE_WEAK_IMPL(dispatch) {
	impl->asyncPutData(data);
	} IO_CAPTURE_WEAK_IMPL_END
	}

	void
	Face::put(lp::Nack nack)
	{
	IO_CAPTURE_WEAK_IMPL(dispatch) {
	impl->asyncPutNack(nack);
	} IO_CAPTURE_WEAK_IMPL_END
	}

	const RegisteredPrefixId*
	Face::setInterestFilter(const InterestFilter& interestFilter,
	const InterestCallback& onInterest,
	const RegisterPrefixFailureCallback& onFailure,
	const security::SigningInfo& signingInfo,
	uint64_t flags)
	{
	return setInterestFilter(interestFilter, onInterest, nullptr, onFailure, signingInfo, flags);
	}

	const RegisteredPrefixId*
	Face::setInterestFilter(const InterestFilter& interestFilter,
	const InterestCallback& onInterest,
	const RegisterPrefixSuccessCallback& onSuccess,
	const RegisterPrefixFailureCallback& onFailure,
	const security::SigningInfo& signingInfo,
	uint64_t flags)
	{
	auto filter = make_shared<InterestFilterRecord>(interestFilter, onInterest);

	nfd::CommandOptions options;
	options.setSigningInfo(signingInfo);

	return m_impl->registerPrefix(interestFilter.getPrefix(), filter,
	onSuccess, onFailure, flags, options);
	}

	const InterestFilterId*
	Face::setInterestFilter(const InterestFilter& interestFilter,
	const InterestCallback& onInterest)
	{
	auto filter = make_shared<InterestFilterRecord>(interestFilter, onInterest);

	IO_CAPTURE_WEAK_IMPL(post) {
	impl->asyncSetInterestFilter(filter);
	} IO_CAPTURE_WEAK_IMPL_END

	return reinterpret_cast<const InterestFilterId*>(filter.get());
	}

	const RegisteredPrefixId*
	Face::registerPrefix(const Name& prefix,
	const RegisterPrefixSuccessCallback& onSuccess,
	const RegisterPrefixFailureCallback& onFailure,
	const security::SigningInfo& signingInfo,
	uint64_t flags)
	{
	nfd::CommandOptions options;
	options.setSigningInfo(signingInfo);

	return m_impl->registerPrefix(prefix, nullptr, onSuccess, onFailure, flags, options);
	}

	void
	Face::unsetInterestFilter(const RegisteredPrefixId* registeredPrefixId)
	{
	IO_CAPTURE_WEAK_IMPL(post) {
	impl->asyncUnregisterPrefix(registeredPrefixId, nullptr, nullptr);
	} IO_CAPTURE_WEAK_IMPL_END
	}

	void
	Face::unsetInterestFilter(const InterestFilterId* interestFilterId)
	{
	IO_CAPTURE_WEAK_IMPL(post) {
	impl->asyncUnsetInterestFilter(interestFilterId);
	} IO_CAPTURE_WEAK_IMPL_END
	}

	void
	Face::unregisterPrefix(const RegisteredPrefixId* registeredPrefixId,
	const UnregisterPrefixSuccessCallback& onSuccess,
	const UnregisterPrefixFailureCallback& onFailure)
	{
	IO_CAPTURE_WEAK_IMPL(post) {
	impl->asyncUnregisterPrefix(registeredPrefixId, onSuccess, onFailure);
	} IO_CAPTURE_WEAK_IMPL_END
	}

	void
	Face::doProcessEvents(time::milliseconds timeout, bool keepThread)
	{
	}

	void
	Face::shutdown()
	{
	IO_CAPTURE_WEAK_IMPL(post) {
	this->asyncShutdown();
	} IO_CAPTURE_WEAK_IMPL_END
	}

	void
	Face::asyncShutdown()
	{
	m_impl->m_pendingInterestTable.clear();
	m_impl->m_registeredPrefixTable.clear();

	if (m_transport->isConnected())
	m_transport->close();
	}

	/**
	* @brief extract local fields from NDNLPv2 packet and tag onto a network layer packet
	*/
	template<typename NetPkt>
	static void
	extractLpLocalFields(NetPkt& netPacket, const lp::Packet& lpPacket)
	{
	addTagFromField<lp::IncomingFaceIdTag, lp::IncomingFaceIdField>(netPacket, lpPacket);
	addTagFromField<lp::CongestionMarkTag, lp::CongestionMarkField>(netPacket, lpPacket);

	if (lpPacket.has<lp::HopCountTagField>()) {
	netPacket.setTag(make_shared<lp::HopCountTag>(lpPacket.get<lp::HopCountTagField>() + 1));
	}
	}

	void
	Face::onReceiveElement(const Block& blockFromDaemon)
	{
	lp::Packet lpPacket(blockFromDaemon); // bare Interest/Data is a valid lp::Packet,
	// no need to distinguish

	Buffer::const_iterator begin, end;
	std::tie(begin, end) = lpPacket.get<lp::FragmentField>();
	Block netPacket(&*begin, std::distance(begin, end));
	switch (netPacket.type()) {
	case tlv::Interest: {
	auto interest = make_shared<Interest>(netPacket);
	if (lpPacket.has<lp::NackField>()) {
	auto nack = make_shared<lp::Nack>(std::move(*interest));
	nack->setHeader(lpPacket.get<lp::NackField>());
	extractLpLocalFields(*nack, lpPacket);
	NDN_LOG_DEBUG(">N " << nack->getInterest() << '~' << nack->getHeader().getReason());
	m_impl->nackPendingInterests(*nack);
	}
	else {
	extractLpLocalFields(*interest, lpPacket);
	NDN_LOG_DEBUG(">I " << *interest);
	m_impl->processIncomingInterest(std::move(interest));
	}
	break;
	}
	case tlv::Data: {
	auto data = make_shared<Data>(netPacket);
	extractLpLocalFields(*data, lpPacket);
	NDN_LOG_DEBUG(">D " << data->getName());
	m_impl->satisfyPendingInterests(*data);
	break;
	}
	}
	}

	} // namespace ndn