src/face.cpp - ndn-cxx - Gitiles

 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
  * Copyright (c) 2013-2015 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 "security/key-chain.hpp"
 #include "security/signing-helpers.hpp"
 #include "util/time.hpp"
 #include "util/random.hpp"
 #include "util/face-uri.hpp"

 namespace ndn {

 Face::Face()
   : m_internalIoService(new boost::asio::io_service())
   , m_ioService(*m_internalIoService)
   , m_internalKeyChain(new KeyChain())
   , m_impl(new Impl(*this))
 {
   construct(*m_internalKeyChain);
 }

 Face::Face(boost::asio::io_service& ioService)
   : m_ioService(ioService)
   , m_internalKeyChain(new KeyChain())
   , m_impl(new Impl(*this))
 {
   construct(*m_internalKeyChain);
 }

 Face::Face(const std::string& host, const std::string& port/* = "6363"*/)
   : m_internalIoService(new boost::asio::io_service())
   , m_ioService(*m_internalIoService)
   , m_internalKeyChain(new KeyChain())
   , m_impl(new Impl(*this))
 {
   construct(make_shared<TcpTransport>(host, port), *m_internalKeyChain);
 }

 Face::Face(const shared_ptr<Transport>& transport)
   : m_internalIoService(new boost::asio::io_service())
   , m_ioService(*m_internalIoService)
   , m_internalKeyChain(new KeyChain())
   , m_impl(new Impl(*this))
 {
   construct(transport, *m_internalKeyChain);
 }

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

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

 void
 Face::construct(KeyChain& keyChain)
 {
   // transport=unix:///var/run/nfd.sock
   // transport=tcp://localhost:6363

   ConfigFile config;
   const auto& transportType = config.getParsedConfiguration()
                                 .get_optional<std::string>("transport");
   if (!transportType) {
     // transport not specified, use default Unix transport.
     construct(UnixTransport::create(config), keyChain);
     return;
   }

   unique_ptr<util::FaceUri> uri;
   try {
     uri.reset(new util::FaceUri(*transportType));
   }
   catch (const util::FaceUri::Error& error) {
     BOOST_THROW_EXCEPTION(ConfigFile::Error(error.what()));
   }

   const std::string protocol = uri->getScheme();

   if (protocol == "unix") {
     construct(UnixTransport::create(config), keyChain);
   }
   else if (protocol == "tcp" || protocol == "tcp4" || protocol == "tcp6") {
     construct(TcpTransport::create(config), keyChain);
   }
   else {
     BOOST_THROW_EXCEPTION(ConfigFile::Error("Unsupported transport protocol \"" + protocol + "\""));
   }
 }

 void
 Face::construct(shared_ptr<Transport> transport, KeyChain& keyChain)
 {
   m_nfdController.reset(new nfd::Controller(*this, keyChain));

   m_transport = transport;

   m_ioService.post([=] { m_impl->ensureConnected(false); });
 }

 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> interestToExpress = make_shared<Interest>(interest);

   // Use `interestToExpress` to avoid wire format creation for the original Interest
   if (interestToExpress->wireEncode().size() > MAX_NDN_PACKET_SIZE) {
     BOOST_THROW_EXCEPTION(Error("Interest size exceeds maximum limit"));
   }

   // If the same ioService thread, dispatch directly calls the method
   m_ioService.dispatch([=] { m_impl->asyncExpressInterest(interestToExpress, afterSatisfied,
                                                           afterNacked, afterTimeout); });

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

 const PendingInterestId*
 Face::expressInterest(const Interest& interest,
                       const OnData& onData,
                       const OnTimeout& onTimeout)
 {
   return this->expressInterest(
     interest,
     [onData] (const Interest& interest, const Data& data) {
       if (onData != nullptr) {
         onData(interest, const_cast<Data&>(data));
       }
     },
     [onTimeout] (const Interest& interest, const lp::Nack& nack) {
       if (onTimeout != nullptr) {
         onTimeout(interest);
       }
     },
     onTimeout
   );
 }

 const PendingInterestId*
 Face::expressInterest(const Name& name,
                       const Interest& tmpl,
                       const OnData& onData, const OnTimeout& onTimeout/* = nullptr*/)
 {
   return expressInterest(Interest(tmpl)
                          .setName(name)
                          .setNonce(0),
                          onData, onTimeout);
 }

 void
 Face::put(const Data& data)
 {
   // Use original `data`, since wire format should already exist for the original Data
   if (data.wireEncode().size() > MAX_NDN_PACKET_SIZE)
     BOOST_THROW_EXCEPTION(Error("Data size exceeds maximum limit"));

   shared_ptr<const Data> dataPtr;
   try {
     dataPtr = data.shared_from_this();
   }
   catch (const bad_weak_ptr& e) {
     std::cerr << "Face::put WARNING: the supplied Data should be created using make_shared<Data>()"
               << std::endl;
     dataPtr = make_shared<Data>(data);
   }

   // If the same ioService thread, dispatch directly calls the method
   m_ioService.dispatch([=] { m_impl->asyncPutData(dataPtr); });
 }

 void
 Face::put(const lp::Nack& nack)
 {
   m_ioService.dispatch([=] { m_impl->asyncPutNack(make_shared<lp::Nack>(nack)); });
 }

 void
 Face::removePendingInterest(const PendingInterestId* pendingInterestId)
 {
   m_ioService.post([=] { m_impl->asyncRemovePendingInterest(pendingInterestId); });
 }

 void
 Face::removeAllPendingInterests()
 {
   m_ioService.post([=] { m_impl->asyncRemoveAllPendingInterests(); });
 }

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

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

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

   getIoService().post([=] { m_impl->asyncSetInterestFilter(filter); });

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

 #ifdef NDN_FACE_KEEP_DEPRECATED_REGISTRATION_SIGNING

 const RegisteredPrefixId*
 Face::setInterestFilter(const InterestFilter& interestFilter,
                         const OnInterest& onInterest,
                         const RegisterPrefixSuccessCallback& onSuccess,
                         const RegisterPrefixFailureCallback& onFailure,
                         const IdentityCertificate& certificate,
                         uint64_t flags)
 {
   security::SigningInfo signingInfo;
   if (!certificate.getName().empty()) {
     signingInfo = signingByCertificate(certificate.getName());
   }
   return setInterestFilter(interestFilter, onInterest,
                            onSuccess, onFailure,
                            signingInfo, flags);
 }

 const RegisteredPrefixId*
 Face::setInterestFilter(const InterestFilter& interestFilter,
                         const OnInterest& onInterest,
                         const RegisterPrefixFailureCallback& onFailure,
                         const IdentityCertificate& certificate,
                         uint64_t flags)
 {
   security::SigningInfo signingInfo;
   if (!certificate.getName().empty()) {
     signingInfo = signingByCertificate(certificate.getName());
   }
   return setInterestFilter(interestFilter, onInterest,
                              onFailure, signingInfo, flags);
 }

 const RegisteredPrefixId*
 Face::setInterestFilter(const InterestFilter& interestFilter,
                         const OnInterest& onInterest,
                         const RegisterPrefixSuccessCallback& onSuccess,
                         const RegisterPrefixFailureCallback& onFailure,
                         const Name& identity,
                         uint64_t flags)
 {
   security::SigningInfo signingInfo = signingByIdentity(identity);

   return setInterestFilter(interestFilter, onInterest,
                            onSuccess, onFailure,
                            signingInfo, flags);
 }

 const RegisteredPrefixId*
 Face::setInterestFilter(const InterestFilter& interestFilter,
                         const OnInterest& onInterest,
                         const RegisterPrefixFailureCallback& onFailure,
                         const Name& identity,
                         uint64_t flags)
 {
   security::SigningInfo signingInfo = signingByIdentity(identity);

   return setInterestFilter(interestFilter, onInterest,
                            onFailure, signingInfo, flags);
 }

 #endif // NDN_FACE_KEEP_DEPRECATED_REGISTRATION_SIGNING

 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, shared_ptr<InterestFilterRecord>(),
                                   onSuccess, onFailure,
                                   flags, options);
 }

 #ifdef NDN_FACE_KEEP_DEPRECATED_REGISTRATION_SIGNING
 const RegisteredPrefixId*
 Face::registerPrefix(const Name& prefix,
                      const RegisterPrefixSuccessCallback& onSuccess,
                      const RegisterPrefixFailureCallback& onFailure,
                      const IdentityCertificate& certificate,
                      uint64_t flags)
 {
   security::SigningInfo signingInfo;
   if (!certificate.getName().empty()) {
     signingInfo = signingByCertificate(certificate.getName());
   }
   return registerPrefix(prefix, onSuccess,
                         onFailure, signingInfo, flags);
 }

 const RegisteredPrefixId*
 Face::registerPrefix(const Name& prefix,
                      const RegisterPrefixSuccessCallback& onSuccess,
                      const RegisterPrefixFailureCallback& onFailure,
                      const Name& identity,
                      uint64_t flags)
 {
   security::SigningInfo signingInfo = signingByIdentity(identity);
   return registerPrefix(prefix, onSuccess,
                         onFailure, signingInfo, flags);
 }
 #endif // NDN_FACE_KEEP_DEPRECATED_REGISTRATION_SIGNING

 void
 Face::unsetInterestFilter(const RegisteredPrefixId* registeredPrefixId)
 {
   m_ioService.post([=] { m_impl->asyncUnregisterPrefix(registeredPrefixId,
                                                        UnregisterPrefixSuccessCallback(),
                                                        UnregisterPrefixFailureCallback()); });
 }

 void
 Face::unsetInterestFilter(const InterestFilterId* interestFilterId)
 {
   m_ioService.post([=] { m_impl->asyncUnsetInterestFilter(interestFilterId); });
 }

 void
 Face::unregisterPrefix(const RegisteredPrefixId* registeredPrefixId,
                        const UnregisterPrefixSuccessCallback& onSuccess,
                        const UnregisterPrefixFailureCallback& onFailure)
 {
   m_ioService.post([=] { m_impl->asyncUnregisterPrefix(registeredPrefixId,onSuccess, onFailure); });
 }

 void
 Face::processEvents(const time::milliseconds& timeout/* = time::milliseconds::zero()*/,
                     bool keepThread/* = false*/)
 {
   if (m_ioService.stopped()) {
     m_ioService.reset(); // ensure that run()/poll() will do some work
   }

   try {
     if (timeout < time::milliseconds::zero()) {
         // do not block if timeout is negative, but process pending events
         m_ioService.poll();
         return;
       }

     if (timeout > time::milliseconds::zero()) {
       boost::asio::io_service& ioService = m_ioService;
       unique_ptr<boost::asio::io_service::work>& work = m_impl->m_ioServiceWork;
       m_impl->m_processEventsTimeoutEvent =
         m_impl->m_scheduler.scheduleEvent(timeout, [&ioService, &work] {
             ioService.stop();
             work.reset();
           });
     }

     if (keepThread) {
       // work will ensure that m_ioService is running until work object exists
       m_impl->m_ioServiceWork.reset(new boost::asio::io_service::work(m_ioService));
     }

     m_ioService.run();
   }
   catch (...) {
     m_impl->m_ioServiceWork.reset();
     m_impl->m_pendingInterestTable.clear();
     m_impl->m_registeredPrefixTable.clear();
     throw;
   }
 }

 void
 Face::shutdown()
 {
   m_ioService.post([this] { this->asyncShutdown(); });
 }

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

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

   m_impl->m_ioServiceWork.reset();
 }

 /**
  * @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)
 {
   if (lpPacket.has<lp::IncomingFaceIdField>()) {
     netPacket.setTag(make_shared<lp::IncomingFaceIdTag>(lpPacket.get<lp::IncomingFaceIdField>()));
   }
 }

 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: {
       shared_ptr<Interest> 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);
         m_impl->nackPendingInterests(*nack);
       }
       else {
         extractLpLocalFields(*interest, lpPacket);
         m_impl->processInterestFilters(*interest);
       }
       break;
     }
     case tlv::Data: {
       shared_ptr<Data> data = make_shared<Data>(netPacket);
       extractLpLocalFields(*data, lpPacket);
       m_impl->satisfyPendingInterests(*data);
       break;
     }
   }
 }

 } // namespace ndn
	/* -- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -- */
	/**
	* Copyright (c) 2013-2015 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 "security/key-chain.hpp"
	#include "security/signing-helpers.hpp"
	#include "util/time.hpp"
	#include "util/random.hpp"
	#include "util/face-uri.hpp"

	namespace ndn {

	Face::Face()
	: m_internalIoService(new boost::asio::io_service())
	, m_ioService(*m_internalIoService)
	, m_internalKeyChain(new KeyChain())
	, m_impl(new Impl(*this))
	{
	construct(*m_internalKeyChain);
	}

	Face::Face(boost::asio::io_service& ioService)
	: m_ioService(ioService)
	, m_internalKeyChain(new KeyChain())
	, m_impl(new Impl(*this))
	{
	construct(*m_internalKeyChain);
	}

	Face::Face(const std::string& host, const std::string& port/* = "6363"*/)
	: m_internalIoService(new boost::asio::io_service())
	, m_ioService(*m_internalIoService)
	, m_internalKeyChain(new KeyChain())
	, m_impl(new Impl(*this))
	{
	construct(make_shared<TcpTransport>(host, port), *m_internalKeyChain);
	}

	Face::Face(const shared_ptr<Transport>& transport)
	: m_internalIoService(new boost::asio::io_service())
	, m_ioService(*m_internalIoService)
	, m_internalKeyChain(new KeyChain())
	, m_impl(new Impl(*this))
	{
	construct(transport, *m_internalKeyChain);
	}

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

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

	void
	Face::construct(KeyChain& keyChain)
	{
	// transport=unix:///var/run/nfd.sock
	// transport=tcp://localhost:6363

	ConfigFile config;
	const auto& transportType = config.getParsedConfiguration()
	.get_optional<std::string>("transport");
	if (!transportType) {
	// transport not specified, use default Unix transport.
	construct(UnixTransport::create(config), keyChain);
	return;
	}

	unique_ptr<util::FaceUri> uri;
	try {
	uri.reset(new util::FaceUri(*transportType));
	}
	catch (const util::FaceUri::Error& error) {
	BOOST_THROW_EXCEPTION(ConfigFile::Error(error.what()));
	}

	const std::string protocol = uri->getScheme();

	if (protocol == "unix") {
	construct(UnixTransport::create(config), keyChain);
	}
	else if (protocol == "tcp" \|\| protocol == "tcp4" \|\| protocol == "tcp6") {
	construct(TcpTransport::create(config), keyChain);
	}
	else {
	BOOST_THROW_EXCEPTION(ConfigFile::Error("Unsupported transport protocol \"" + protocol + "\""));
	}
	}

	void
	Face::construct(shared_ptr<Transport> transport, KeyChain& keyChain)
	{
	m_nfdController.reset(new nfd::Controller(*this, keyChain));

	m_transport = transport;

	m_ioService.post([=] { m_impl->ensureConnected(false); });
	}

	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> interestToExpress = make_shared<Interest>(interest);

	// Use `interestToExpress` to avoid wire format creation for the original Interest
	if (interestToExpress->wireEncode().size() > MAX_NDN_PACKET_SIZE) {
	BOOST_THROW_EXCEPTION(Error("Interest size exceeds maximum limit"));
	}

	// If the same ioService thread, dispatch directly calls the method
	m_ioService.dispatch([=] { m_impl->asyncExpressInterest(interestToExpress, afterSatisfied,
	afterNacked, afterTimeout); });

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

	const PendingInterestId*
	Face::expressInterest(const Interest& interest,
	const OnData& onData,
	const OnTimeout& onTimeout)
	{
	return this->expressInterest(
	interest,
	[onData] (const Interest& interest, const Data& data) {
	if (onData != nullptr) {
	onData(interest, const_cast<Data&>(data));
	}
	},
	[onTimeout] (const Interest& interest, const lp::Nack& nack) {
	if (onTimeout != nullptr) {
	onTimeout(interest);
	}
	},
	onTimeout
	);
	}

	const PendingInterestId*
	Face::expressInterest(const Name& name,
	const Interest& tmpl,
	const OnData& onData, const OnTimeout& onTimeout/* = nullptr*/)
	{
	return expressInterest(Interest(tmpl)
	.setName(name)
	.setNonce(0),
	onData, onTimeout);
	}

	void
	Face::put(const Data& data)
	{
	// Use original `data`, since wire format should already exist for the original Data
	if (data.wireEncode().size() > MAX_NDN_PACKET_SIZE)
	BOOST_THROW_EXCEPTION(Error("Data size exceeds maximum limit"));

	shared_ptr<const Data> dataPtr;
	try {
	dataPtr = data.shared_from_this();
	}
	catch (const bad_weak_ptr& e) {
	std::cerr << "Face::put WARNING: the supplied Data should be created using make_shared<Data>()"
	<< std::endl;
	dataPtr = make_shared<Data>(data);
	}

	// If the same ioService thread, dispatch directly calls the method
	m_ioService.dispatch([=] { m_impl->asyncPutData(dataPtr); });
	}

	void
	Face::put(const lp::Nack& nack)
	{
	m_ioService.dispatch([=] { m_impl->asyncPutNack(make_shared<lp::Nack>(nack)); });
	}

	void
	Face::removePendingInterest(const PendingInterestId* pendingInterestId)
	{
	m_ioService.post([=] { m_impl->asyncRemovePendingInterest(pendingInterestId); });
	}

	void
	Face::removeAllPendingInterests()
	{
	m_ioService.post([=] { m_impl->asyncRemoveAllPendingInterests(); });
	}

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

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

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

	getIoService().post([=] { m_impl->asyncSetInterestFilter(filter); });

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

	#ifdef NDN_FACE_KEEP_DEPRECATED_REGISTRATION_SIGNING

	const RegisteredPrefixId*
	Face::setInterestFilter(const InterestFilter& interestFilter,
	const OnInterest& onInterest,
	const RegisterPrefixSuccessCallback& onSuccess,
	const RegisterPrefixFailureCallback& onFailure,
	const IdentityCertificate& certificate,
	uint64_t flags)
	{
	security::SigningInfo signingInfo;
	if (!certificate.getName().empty()) {
	signingInfo = signingByCertificate(certificate.getName());
	}
	return setInterestFilter(interestFilter, onInterest,
	onSuccess, onFailure,
	signingInfo, flags);
	}

	const RegisteredPrefixId*
	Face::setInterestFilter(const InterestFilter& interestFilter,
	const OnInterest& onInterest,
	const RegisterPrefixFailureCallback& onFailure,
	const IdentityCertificate& certificate,
	uint64_t flags)
	{
	security::SigningInfo signingInfo;
	if (!certificate.getName().empty()) {
	signingInfo = signingByCertificate(certificate.getName());
	}
	return setInterestFilter(interestFilter, onInterest,
	onFailure, signingInfo, flags);
	}

	const RegisteredPrefixId*
	Face::setInterestFilter(const InterestFilter& interestFilter,
	const OnInterest& onInterest,
	const RegisterPrefixSuccessCallback& onSuccess,
	const RegisterPrefixFailureCallback& onFailure,
	const Name& identity,
	uint64_t flags)
	{
	security::SigningInfo signingInfo = signingByIdentity(identity);

	return setInterestFilter(interestFilter, onInterest,
	onSuccess, onFailure,
	signingInfo, flags);
	}

	const RegisteredPrefixId*
	Face::setInterestFilter(const InterestFilter& interestFilter,
	const OnInterest& onInterest,
	const RegisterPrefixFailureCallback& onFailure,
	const Name& identity,
	uint64_t flags)
	{
	security::SigningInfo signingInfo = signingByIdentity(identity);

	return setInterestFilter(interestFilter, onInterest,
	onFailure, signingInfo, flags);
	}

	#endif // NDN_FACE_KEEP_DEPRECATED_REGISTRATION_SIGNING

	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, shared_ptr<InterestFilterRecord>(),
	onSuccess, onFailure,
	flags, options);
	}

	#ifdef NDN_FACE_KEEP_DEPRECATED_REGISTRATION_SIGNING
	const RegisteredPrefixId*
	Face::registerPrefix(const Name& prefix,
	const RegisterPrefixSuccessCallback& onSuccess,
	const RegisterPrefixFailureCallback& onFailure,
	const IdentityCertificate& certificate,
	uint64_t flags)
	{
	security::SigningInfo signingInfo;
	if (!certificate.getName().empty()) {
	signingInfo = signingByCertificate(certificate.getName());
	}
	return registerPrefix(prefix, onSuccess,
	onFailure, signingInfo, flags);
	}

	const RegisteredPrefixId*
	Face::registerPrefix(const Name& prefix,
	const RegisterPrefixSuccessCallback& onSuccess,
	const RegisterPrefixFailureCallback& onFailure,
	const Name& identity,
	uint64_t flags)
	{
	security::SigningInfo signingInfo = signingByIdentity(identity);
	return registerPrefix(prefix, onSuccess,
	onFailure, signingInfo, flags);
	}
	#endif // NDN_FACE_KEEP_DEPRECATED_REGISTRATION_SIGNING

	void
	Face::unsetInterestFilter(const RegisteredPrefixId* registeredPrefixId)
	{
	m_ioService.post([=] { m_impl->asyncUnregisterPrefix(registeredPrefixId,
	UnregisterPrefixSuccessCallback(),
	UnregisterPrefixFailureCallback()); });
	}

	void
	Face::unsetInterestFilter(const InterestFilterId* interestFilterId)
	{
	m_ioService.post([=] { m_impl->asyncUnsetInterestFilter(interestFilterId); });
	}

	void
	Face::unregisterPrefix(const RegisteredPrefixId* registeredPrefixId,
	const UnregisterPrefixSuccessCallback& onSuccess,
	const UnregisterPrefixFailureCallback& onFailure)
	{
	m_ioService.post([=] { m_impl->asyncUnregisterPrefix(registeredPrefixId,onSuccess, onFailure); });
	}

	void
	Face::processEvents(const time::milliseconds& timeout/* = time::milliseconds::zero()*/,
	bool keepThread/* = false*/)
	{
	if (m_ioService.stopped()) {
	m_ioService.reset(); // ensure that run()/poll() will do some work
	}

	try {
	if (timeout < time::milliseconds::zero()) {
	// do not block if timeout is negative, but process pending events
	m_ioService.poll();
	return;
	}

	if (timeout > time::milliseconds::zero()) {
	boost::asio::io_service& ioService = m_ioService;
	unique_ptr<boost::asio::io_service::work>& work = m_impl->m_ioServiceWork;
	m_impl->m_processEventsTimeoutEvent =
	m_impl->m_scheduler.scheduleEvent(timeout, [&ioService, &work] {
	ioService.stop();
	work.reset();
	});
	}

	if (keepThread) {
	// work will ensure that m_ioService is running until work object exists
	m_impl->m_ioServiceWork.reset(new boost::asio::io_service::work(m_ioService));
	}

	m_ioService.run();
	}
	catch (...) {
	m_impl->m_ioServiceWork.reset();
	m_impl->m_pendingInterestTable.clear();
	m_impl->m_registeredPrefixTable.clear();
	throw;
	}
	}

	void
	Face::shutdown()
	{
	m_ioService.post([this] { this->asyncShutdown(); });
	}

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

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

	m_impl->m_ioServiceWork.reset();
	}

	/**
	* @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)
	{
	if (lpPacket.has<lp::IncomingFaceIdField>()) {
	netPacket.setTag(make_shared<lp::IncomingFaceIdTag>(lpPacket.get<lp::IncomingFaceIdField>()));
	}
	}

	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: {
	shared_ptr<Interest> 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);
	m_impl->nackPendingInterests(*nack);
	}
	else {
	extractLpLocalFields(*interest, lpPacket);
	m_impl->processInterestFilters(*interest);
	}
	break;
	}
	case tlv::Data: {
	shared_ptr<Data> data = make_shared<Data>(netPacket);
	extractLpLocalFields(*data, lpPacket);
	m_impl->satisfyPendingInterests(*data);
	break;
	}
	}
	}

	} // namespace ndn