NodeHandshakeExtension.h

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/*
 * NodeHandshakeExtension.h
 *
 * Copyright (C) 2011 IBR, TU Braunschweig
 *
 * Written-by: Johannes Morgenroth <morgenroth@ibr.cs.tu-bs.de>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#ifndef NODEHANDSHAKEEXTENSION_H_
#define NODEHANDSHAKEEXTENSION_H_

#include "routing/RoutingExtension.h"
#include "core/AbstractWorker.h"
#include "core/EventReceiver.h"
#include "core/NodeEvent.h"

#include <ibrcommon/thread/Mutex.h>
#include <ibrcommon/thread/Queue.h>
#include <map>

namespace dtn
{
        namespace routing
        {
                class NodeHandshakeExtension : public RoutingExtension, public dtn::core::EventReceiver<dtn::core::NodeEvent>
                {
                        static const std::string TAG;

                public:
                        NodeHandshakeExtension();
                        virtual ~NodeHandshakeExtension();

                        void raiseEvent(const dtn::core::NodeEvent &evt) throw ();
                        void componentUp() throw ();
                        void componentDown() throw ();

                        void doHandshake(const dtn::data::EID &eid);

                        void pushHandshakeUpdated(const NodeHandshakeItem::IDENTIFIER id);

                        void requestHandshake(const dtn::data::EID &destination, NodeHandshake &request) const;

                        void responseHandshake(const dtn::data::EID &source, const NodeHandshake &request, NodeHandshake &answer);

                        void processHandshake(const dtn::data::EID &source, NodeHandshake &answer);

                protected:
                        void processHandshake(const dtn::data::Bundle &bundle);

                private:
                        class HandshakeEndpoint : public dtn::core::AbstractWorker
                        {
                        public:
                                HandshakeEndpoint(NodeHandshakeExtension &callback);
                                virtual ~HandshakeEndpoint();

                                void callbackBundleReceived(const Bundle &b);
                                void query(const dtn::data::EID &eid);
                                void push(const NodeHandshakeItem::IDENTIFIER id);

                                void send(dtn::data::Bundle &b);

                                void removeFromBlacklist(const dtn::data::EID &eid);

                        private:
                                NodeHandshakeExtension &_callback;
                                std::map<dtn::data::EID, dtn::data::Timestamp> _blacklist;
                                ibrcommon::Mutex _blacklist_lock;
                        };

                        HandshakeEndpoint _endpoint;

                        static const dtn::data::EID BROADCAST_ENDPOINT;
                };
        } /* namespace routing */
} /* namespace dtn */
#endif /* NODEHANDSHAKEEXTENSION_H_ */