rib/rib-manager.cpp - ndnSIM - Gitiles

 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
  * Copyright (c) 2014  Regents of the University of California,
  *                     Arizona Board of Regents,
  *                     Colorado State University,
  *                     University Pierre & Marie Curie, Sorbonne University,
  *                     Washington University in St. Louis,
  *                     Beijing Institute of Technology,
  *                     The University of Memphis
  *
  * This file is part of NFD (Named Data Networking Forwarding Daemon).
  * See AUTHORS.md for complete list of NFD authors and contributors.
  *
  * NFD is free software: you can redistribute it and/or modify it under the terms
  * of the GNU General Public License as published by the Free Software Foundation,
  * either version 3 of the License, or (at your option) any later version.
  *
  * NFD 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
  * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
  **/

 #include "rib-manager.hpp"
 #include "core/logger.hpp"

 namespace nfd {
 namespace rib {

 NFD_LOG_INIT("RibManager");

 const Name RibManager::COMMAND_PREFIX = "/localhost/nrd";
 const Name RibManager::REMOTE_COMMAND_PREFIX = "/localhop/nrd";

 const size_t RibManager::COMMAND_UNSIGNED_NCOMPS =
   RibManager::COMMAND_PREFIX.size() +
   1 + // verb
   1;  // verb options

 const size_t RibManager::COMMAND_SIGNED_NCOMPS =
   RibManager::COMMAND_UNSIGNED_NCOMPS +
   4; // (timestamp, nonce, signed info tlv, signature tlv)

 const RibManager::VerbAndProcessor RibManager::COMMAND_VERBS[] =
   {
     VerbAndProcessor(
                      Name::Component("register"),
                      &RibManager::insertEntry
                      ),

     VerbAndProcessor(
                      Name::Component("unregister"),
                      &RibManager::deleteEntry
                      ),
   };

 RibManager::RibManager()
   : m_face(new ndn::Face())
   , m_nfdController(new ndn::nfd::Controller(*m_face))
   , m_validator(m_face)
   , m_faceMonitor(*m_face)
   , m_verbDispatch(COMMAND_VERBS,
                    COMMAND_VERBS + (sizeof(COMMAND_VERBS) / sizeof(VerbAndProcessor)))
 {
 }

 void
 RibManager::registerWithNfd()
 {
   //check whether the components of localhop and localhost prefixes are same
   BOOST_ASSERT(COMMAND_PREFIX.size() == REMOTE_COMMAND_PREFIX.size());

   NFD_LOG_INFO("Setting interest filter on: " << COMMAND_PREFIX.toUri());
   m_face->setController(m_nfdController);
   m_face->setInterestFilter(COMMAND_PREFIX.toUri(),
                             bind(&RibManager::onRibRequest, this, _2),
                             bind(&RibManager::setInterestFilterFailed, this, _1, _2));

   NFD_LOG_INFO("Setting interest filter on: " << REMOTE_COMMAND_PREFIX.toUri());
   m_face->setInterestFilter(REMOTE_COMMAND_PREFIX.toUri(),
                             bind(&RibManager::onRibRequest, this, _2),
                             bind(&RibManager::setInterestFilterFailed, this, _1, _2));

   NFD_LOG_INFO("Start monitoring face create/destroy events");
   m_faceMonitor.addSubscriber(boost::bind(&RibManager::onNotification, this, _1));
   m_faceMonitor.startNotifications();
 }

 void
 RibManager::setConfigFile(ConfigFile& configFile)
 {
   configFile.addSectionHandler("rib_security",
                                bind(&RibManager::onConfig, this, _1, _2, _3));
 }

 void
 RibManager::onConfig(const ConfigSection& configSection,
                       bool isDryRun,
                       const std::string& filename)
 {
   /// \todo remove check after validator-conf replaces settings on each load
   if (!isDryRun)
     m_validator.load(configSection, filename);
 }

 void
 RibManager::setInterestFilterFailed(const Name& name, const std::string& msg)
 {
   NFD_LOG_ERROR("Error in setting interest filter (" << name << "): " << msg);
   m_face->shutdown();
 }

 void
 RibManager::sendResponse(const Name& name,
                          const ControlResponse& response)
 {
   const Block& encodedControl = response.wireEncode();

   Data responseData(name);
   responseData.setContent(encodedControl);

   m_keyChain.sign(responseData);
   m_face->put(responseData);
 }

 void
 RibManager::sendResponse(const Name& name,
                          uint32_t code,
                          const std::string& text)
 {
   ControlResponse response(code, text);
   sendResponse(name, response);
 }

 void
 RibManager::onRibRequest(const Interest& request)
 {
   m_validator.validate(request,
                        bind(&RibManager::onRibRequestValidated, this, _1),
                        bind(&RibManager::onRibRequestValidationFailed, this, _1, _2));
 }

 void
 RibManager::onRibRequestValidated(const shared_ptr<const Interest>& request)
 {
   const Name& command = request->getName();

   //REMOTE_COMMAND_PREFIX number of componenets are same as
   // NRD_COMMAND_PREFIX's so no extra checks are required.
   const Name::Component& verb = command.get(COMMAND_PREFIX.size());
   VerbDispatchTable::const_iterator verbProcessor = m_verbDispatch.find(verb);

   if (verbProcessor != m_verbDispatch.end())
     {
       NFD_LOG_TRACE("Processing '" << verb << "' verb");

       PrefixRegOptions options;
       if (!extractOptions(*request, options))
         {
           NFD_LOG_DEBUG("Error while extracting options, returning malformed command");
           sendResponse(command, 400, "Malformed command");
           return;
         }

       NFD_LOG_DEBUG("Received options (name, faceid, cost): " << options.getName()
                     << ", " << options.getFaceId() << ", "  << options.getCost());

       ControlResponse response;
       (verbProcessor->second)(this, *request, options);
     }
   else
     {
       NFD_LOG_DEBUG("Unsupported command: " << verb);
       sendResponse(request->getName(), 501, "Unsupported command");
     }
 }

 void
 RibManager::onRibRequestValidationFailed(const shared_ptr<const Interest>& request,
                                          const std::string& failureInfo)
 {
   NFD_LOG_DEBUG("RibRequestValidationFailed: " << failureInfo);
   sendResponse(request->getName(), 403, failureInfo);
 }

 bool
 RibManager::extractOptions(const Interest& request,
                            PrefixRegOptions& extractedOptions)
 {
   // const Name& command = request.getName();
   //REMOTE_COMMAND_PREFIX is same in size of NRD_COMMAND_PREFIX
   //so no extra processing is required.
   const size_t optionCompIndex = COMMAND_PREFIX.size() + 1;

   try
     {
       Block rawOptions = request.getName()[optionCompIndex].blockFromValue();
       extractedOptions.wireDecode(rawOptions);
     }
   catch (const ndn::Tlv::Error& e)
     {
       return false;
     }

   if (extractedOptions.getFaceId() == 0)
     {
       NFD_LOG_TRACE("IncomingFaceId: " << request.getIncomingFaceId());
       extractedOptions.setFaceId(request.getIncomingFaceId());
     }
   return true;
 }

 void
 RibManager::onCommandError(uint32_t code, const std::string& error,
                            const Interest& request,
                            const PrefixRegOptions& options)
 {
   NFD_LOG_ERROR("NFD returned an error: " << error << " (code: " << code << ")");

   ControlResponse response;

   if (code == 404)
     {
       response.setCode(code);
       response.setText(error);
     }
   else
     {
       response.setCode(533);
       std::ostringstream os;
       os << "Failure to update NFD " << "(NFD Error: " << code << " " << error << ")";
       response.setText(os.str());
     }

   sendResponse(request.getName(), response);
   m_managedRib.erase(options);
 }

 void
 RibManager::onUnRegSuccess(const Interest& request, const PrefixRegOptions& options)
 {
   ControlResponse response;

   response.setCode(200);
   response.setText("Success");
   response.setBody(options.wireEncode());

   NFD_LOG_DEBUG("onUnRegSuccess: Name unregistered (" << options.getName()
                 << ", " << options.getFaceId() << ")");

   sendResponse(request.getName(), response);
   m_managedRib.erase(options);
 }

 void
 RibManager::onRegSuccess(const Interest& request, const PrefixRegOptions& options)
 {
   ControlResponse response;

   response.setCode(200);
   response.setText("Success");
   response.setBody(options.wireEncode());

   NFD_LOG_DEBUG("onRegSuccess: Name registered (" << options.getName() << ", "
                 << options.getFaceId() << ")");
   sendResponse(request.getName(), response);
 }

 void
 RibManager::insertEntry(const Interest& request, const PrefixRegOptions& options)
 {
   // For right now, just pass the options to fib as it is,
   // without processing flags. Later options will be first added to
   // Rib tree, then nrd will generate fib updates based on flags and then
   // will add next hops one by one..
   m_managedRib.insert(options);
   m_nfdController->start<ndn::nfd::FibAddNextHopCommand>(
     ControlParameters()
       .setName(options.getName())
       .setFaceId(options.getFaceId())
       .setCost(options.getCost()),
     bind(&RibManager::onRegSuccess, this, request, options),
     bind(&RibManager::onCommandError, this, _1, _2, request, options));
 }

 void
 RibManager::deleteEntry(const Interest& request, const PrefixRegOptions& options)
 {
   m_nfdController->start<ndn::nfd::FibRemoveNextHopCommand>(
     ControlParameters()
       .setName(options.getName())
       .setFaceId(options.getFaceId()),
     bind(&RibManager::onUnRegSuccess, this, request, options),
     bind(&RibManager::onCommandError, this, _1, _2, request, options));
 }

 boost::asio::io_service&
 RibManager::getIoService()
 {
   /// \todo Switch face to use global io service (needs library update)
   return *m_face->ioService();
 }

 void
 RibManager::onControlHeaderSuccess()
 {
   NFD_LOG_DEBUG("Local control header enabled");
 }

 void
 RibManager::onControlHeaderError(uint32_t code, const std::string& reason)
 {
   NFD_LOG_ERROR("Error: couldn't enable local control header "
                 << "(code: " << code << ", info: " << reason << ")");
   m_face->shutdown();
 }

 void
 RibManager::enableLocalControlHeader()
 {
   m_nfdController->start<ndn::nfd::FaceEnableLocalControlCommand>(
     ControlParameters()
       .setLocalControlFeature(ndn::nfd::LOCAL_CONTROL_FEATURE_INCOMING_FACE_ID),
     bind(&RibManager::onControlHeaderSuccess, this),
     bind(&RibManager::onControlHeaderError, this, _1, _2));
 }

 void
 RibManager::onNotification(const FaceEventNotification& notification)
 {
   /// \todo A notification can be missed, in this case check Facelist
   NFD_LOG_TRACE("onNotification: " << notification);
   if (notification.getKind() == ndn::nfd::FACE_EVENT_DESTROYED) { //face destroyed
     m_managedRib.erase(notification.getFaceId());
   }
 }

 } // namespace rib
 } // namespace nfd
	/* -- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -- */
	/**
	* Copyright (c) 2014 Regents of the University of California,
	* Arizona Board of Regents,
	* Colorado State University,
	* University Pierre & Marie Curie, Sorbonne University,
	* Washington University in St. Louis,
	* Beijing Institute of Technology,
	* The University of Memphis
	*
	* This file is part of NFD (Named Data Networking Forwarding Daemon).
	* See AUTHORS.md for complete list of NFD authors and contributors.
	*
	* NFD is free software: you can redistribute it and/or modify it under the terms
	* of the GNU General Public License as published by the Free Software Foundation,
	* either version 3 of the License, or (at your option) any later version.
	*
	* NFD 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
	* NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
	**/

	#include "rib-manager.hpp"
	#include "core/logger.hpp"

	namespace nfd {
	namespace rib {

	NFD_LOG_INIT("RibManager");

	const Name RibManager::COMMAND_PREFIX = "/localhost/nrd";
	const Name RibManager::REMOTE_COMMAND_PREFIX = "/localhop/nrd";

	const size_t RibManager::COMMAND_UNSIGNED_NCOMPS =
	RibManager::COMMAND_PREFIX.size() +
	1 + // verb
	1; // verb options

	const size_t RibManager::COMMAND_SIGNED_NCOMPS =
	RibManager::COMMAND_UNSIGNED_NCOMPS +
	4; // (timestamp, nonce, signed info tlv, signature tlv)

	const RibManager::VerbAndProcessor RibManager::COMMAND_VERBS[] =
	{
	VerbAndProcessor(
	Name::Component("register"),
	&RibManager::insertEntry
	),

	VerbAndProcessor(
	Name::Component("unregister"),
	&RibManager::deleteEntry
	),
	};

	RibManager::RibManager()
	: m_face(new ndn::Face())
	, m_nfdController(new ndn::nfd::Controller(*m_face))
	, m_validator(m_face)
	, m_faceMonitor(*m_face)
	, m_verbDispatch(COMMAND_VERBS,
	COMMAND_VERBS + (sizeof(COMMAND_VERBS) / sizeof(VerbAndProcessor)))
	{
	}

	void
	RibManager::registerWithNfd()
	{
	//check whether the components of localhop and localhost prefixes are same
	BOOST_ASSERT(COMMAND_PREFIX.size() == REMOTE_COMMAND_PREFIX.size());

	NFD_LOG_INFO("Setting interest filter on: " << COMMAND_PREFIX.toUri());
	m_face->setController(m_nfdController);
	m_face->setInterestFilter(COMMAND_PREFIX.toUri(),
	bind(&RibManager::onRibRequest, this, _2),
	bind(&RibManager::setInterestFilterFailed, this, _1, _2));

	NFD_LOG_INFO("Setting interest filter on: " << REMOTE_COMMAND_PREFIX.toUri());
	m_face->setInterestFilter(REMOTE_COMMAND_PREFIX.toUri(),
	bind(&RibManager::onRibRequest, this, _2),
	bind(&RibManager::setInterestFilterFailed, this, _1, _2));

	NFD_LOG_INFO("Start monitoring face create/destroy events");
	m_faceMonitor.addSubscriber(boost::bind(&RibManager::onNotification, this, _1));
	m_faceMonitor.startNotifications();
	}

	void
	RibManager::setConfigFile(ConfigFile& configFile)
	{
	configFile.addSectionHandler("rib_security",
	bind(&RibManager::onConfig, this, _1, _2, _3));
	}

	void
	RibManager::onConfig(const ConfigSection& configSection,
	bool isDryRun,
	const std::string& filename)
	{
	/// \todo remove check after validator-conf replaces settings on each load
	if (!isDryRun)
	m_validator.load(configSection, filename);
	}

	void
	RibManager::setInterestFilterFailed(const Name& name, const std::string& msg)
	{
	NFD_LOG_ERROR("Error in setting interest filter (" << name << "): " << msg);
	m_face->shutdown();
	}

	void
	RibManager::sendResponse(const Name& name,
	const ControlResponse& response)
	{
	const Block& encodedControl = response.wireEncode();

	Data responseData(name);
	responseData.setContent(encodedControl);

	m_keyChain.sign(responseData);
	m_face->put(responseData);
	}

	void
	RibManager::sendResponse(const Name& name,
	uint32_t code,
	const std::string& text)
	{
	ControlResponse response(code, text);
	sendResponse(name, response);
	}

	void
	RibManager::onRibRequest(const Interest& request)
	{
	m_validator.validate(request,
	bind(&RibManager::onRibRequestValidated, this, _1),
	bind(&RibManager::onRibRequestValidationFailed, this, _1, _2));
	}

	void
	RibManager::onRibRequestValidated(const shared_ptr<const Interest>& request)
	{
	const Name& command = request->getName();

	//REMOTE_COMMAND_PREFIX number of componenets are same as
	// NRD_COMMAND_PREFIX's so no extra checks are required.
	const Name::Component& verb = command.get(COMMAND_PREFIX.size());
	VerbDispatchTable::const_iterator verbProcessor = m_verbDispatch.find(verb);

	if (verbProcessor != m_verbDispatch.end())
	{
	NFD_LOG_TRACE("Processing '" << verb << "' verb");

	PrefixRegOptions options;
	if (!extractOptions(*request, options))
	{
	NFD_LOG_DEBUG("Error while extracting options, returning malformed command");
	sendResponse(command, 400, "Malformed command");
	return;
	}

	NFD_LOG_DEBUG("Received options (name, faceid, cost): " << options.getName()
	<< ", " << options.getFaceId() << ", " << options.getCost());

	ControlResponse response;
	(verbProcessor->second)(this, *request, options);
	}
	else
	{
	NFD_LOG_DEBUG("Unsupported command: " << verb);
	sendResponse(request->getName(), 501, "Unsupported command");
	}
	}

	void
	RibManager::onRibRequestValidationFailed(const shared_ptr<const Interest>& request,
	const std::string& failureInfo)
	{
	NFD_LOG_DEBUG("RibRequestValidationFailed: " << failureInfo);
	sendResponse(request->getName(), 403, failureInfo);
	}

	bool
	RibManager::extractOptions(const Interest& request,
	PrefixRegOptions& extractedOptions)
	{
	// const Name& command = request.getName();
	//REMOTE_COMMAND_PREFIX is same in size of NRD_COMMAND_PREFIX
	//so no extra processing is required.
	const size_t optionCompIndex = COMMAND_PREFIX.size() + 1;

	try
	{
	Block rawOptions = request.getName()[optionCompIndex].blockFromValue();
	extractedOptions.wireDecode(rawOptions);
	}
	catch (const ndn::Tlv::Error& e)
	{
	return false;
	}

	if (extractedOptions.getFaceId() == 0)
	{
	NFD_LOG_TRACE("IncomingFaceId: " << request.getIncomingFaceId());
	extractedOptions.setFaceId(request.getIncomingFaceId());
	}
	return true;
	}

	void
	RibManager::onCommandError(uint32_t code, const std::string& error,
	const Interest& request,
	const PrefixRegOptions& options)
	{
	NFD_LOG_ERROR("NFD returned an error: " << error << " (code: " << code << ")");

	ControlResponse response;

	if (code == 404)
	{
	response.setCode(code);
	response.setText(error);
	}
	else
	{
	response.setCode(533);
	std::ostringstream os;
	os << "Failure to update NFD " << "(NFD Error: " << code << " " << error << ")";
	response.setText(os.str());
	}

	sendResponse(request.getName(), response);
	m_managedRib.erase(options);
	}

	void
	RibManager::onUnRegSuccess(const Interest& request, const PrefixRegOptions& options)
	{
	ControlResponse response;

	response.setCode(200);
	response.setText("Success");
	response.setBody(options.wireEncode());

	NFD_LOG_DEBUG("onUnRegSuccess: Name unregistered (" << options.getName()
	<< ", " << options.getFaceId() << ")");

	sendResponse(request.getName(), response);
	m_managedRib.erase(options);
	}

	void
	RibManager::onRegSuccess(const Interest& request, const PrefixRegOptions& options)
	{
	ControlResponse response;

	response.setCode(200);
	response.setText("Success");
	response.setBody(options.wireEncode());

	NFD_LOG_DEBUG("onRegSuccess: Name registered (" << options.getName() << ", "
	<< options.getFaceId() << ")");
	sendResponse(request.getName(), response);
	}

	void
	RibManager::insertEntry(const Interest& request, const PrefixRegOptions& options)
	{
	// For right now, just pass the options to fib as it is,
	// without processing flags. Later options will be first added to
	// Rib tree, then nrd will generate fib updates based on flags and then
	// will add next hops one by one..
	m_managedRib.insert(options);
	m_nfdController->start<ndn::nfd::FibAddNextHopCommand>(
	ControlParameters()
	.setName(options.getName())
	.setFaceId(options.getFaceId())
	.setCost(options.getCost()),
	bind(&RibManager::onRegSuccess, this, request, options),
	bind(&RibManager::onCommandError, this, _1, _2, request, options));
	}

	void
	RibManager::deleteEntry(const Interest& request, const PrefixRegOptions& options)
	{
	m_nfdController->start<ndn::nfd::FibRemoveNextHopCommand>(
	ControlParameters()
	.setName(options.getName())
	.setFaceId(options.getFaceId()),
	bind(&RibManager::onUnRegSuccess, this, request, options),
	bind(&RibManager::onCommandError, this, _1, _2, request, options));
	}

	boost::asio::io_service&
	RibManager::getIoService()
	{
	/// \todo Switch face to use global io service (needs library update)
	return *m_face->ioService();
	}

	void
	RibManager::onControlHeaderSuccess()
	{
	NFD_LOG_DEBUG("Local control header enabled");
	}

	void
	RibManager::onControlHeaderError(uint32_t code, const std::string& reason)
	{
	NFD_LOG_ERROR("Error: couldn't enable local control header "
	<< "(code: " << code << ", info: " << reason << ")");
	m_face->shutdown();
	}

	void
	RibManager::enableLocalControlHeader()
	{
	m_nfdController->start<ndn::nfd::FaceEnableLocalControlCommand>(
	ControlParameters()
	.setLocalControlFeature(ndn::nfd::LOCAL_CONTROL_FEATURE_INCOMING_FACE_ID),
	bind(&RibManager::onControlHeaderSuccess, this),
	bind(&RibManager::onControlHeaderError, this, _1, _2));
	}

	void
	RibManager::onNotification(const FaceEventNotification& notification)
	{
	/// \todo A notification can be missed, in this case check Facelist
	NFD_LOG_TRACE("onNotification: " << notification);
	if (notification.getKind() == ndn::nfd::FACE_EVENT_DESTROYED) { //face destroyed
	m_managedRib.erase(notification.getFaceId());
	}
	}

	} // namespace rib
	} // namespace nfd