ConnectionManager.h

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/*
 * ConnectionManager.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 CONNECTIONMANAGER_H_
#define CONNECTIONMANAGER_H_

#include "Component.h"
#include "net/ConvergenceLayer.h"
#include "net/P2PDialupExtension.h"
#include "net/BundleReceiver.h"
#include "core/EventReceiver.h"
#include <ibrdtn/data/EID.h>
#include "core/Node.h"
#include <ibrcommon/Exceptions.h>

#include "core/NodeEvent.h"
#include "core/TimeEvent.h"
#include "core/GlobalEvent.h"
#include "net/ConnectionEvent.h"

#include <set>
#include <list>

namespace dtn
{
        namespace net
        {
                class NodeNotAvailableException : public ibrcommon::Exception
                {
                public:
                        NodeNotAvailableException(string what = "The requested node is not a neighbor.") throw() : ibrcommon::Exception(what)
                        {
                        };
                };

                class ConnectionNotAvailableException : public ibrcommon::Exception
                {
                public:
                        ConnectionNotAvailableException(string what = "The requested connection is not available.") throw() : ibrcommon::Exception(what)
                        {
                        };
                };

                class ConnectionManager
                  : public dtn::core::EventReceiver<dtn::core::TimeEvent>, public dtn::daemon::IntegratedComponent,
                        public dtn::core::EventReceiver<dtn::core::GlobalEvent>, public dtn::core::EventReceiver<dtn::core::NodeEvent>, public dtn::core::EventReceiver<dtn::net::ConnectionEvent>
                {
                public:
                        ConnectionManager();
                        virtual ~ConnectionManager();

                        void add(const dtn::core::Node &n) throw ();
                        void remove(const dtn::core::Node &n) throw ();

                        void add(ConvergenceLayer *cl);

                        void remove(ConvergenceLayer *cl);

                        void add(P2PDialupExtension *ext);

                        void remove(P2PDialupExtension *ext);

                        void queue(dtn::net::BundleTransfer &job);

                        void raiseEvent(const dtn::core::TimeEvent &evt) throw ();
                        void raiseEvent(const dtn::core::NodeEvent &evt) throw ();
                        void raiseEvent(const dtn::net::ConnectionEvent &evt) throw ();
                        void raiseEvent(const dtn::core::GlobalEvent &evt) throw ();

                        class ShutdownException : public ibrcommon::Exception
                        {
                        public:
                                ShutdownException(string what = "System shutdown") throw() : ibrcommon::Exception(what)
                                {
                                };
                        };

                        void open(const dtn::core::Node &node) throw (ibrcommon::Exception);


                        typedef std::set<dtn::core::Node::Protocol> protocol_set;
                        typedef std::list<dtn::core::Node::Protocol> protocol_list;

                        const protocol_set getSupportedProtocols() throw ();

                        const protocol_list getSupportedProtocols(const dtn::data::EID &eid) throw (NodeNotAvailableException);

                        const std::set<dtn::core::Node> getNeighbors();

                        bool isNeighbor(const dtn::core::Node&) throw ();

                        const dtn::core::Node getNeighbor(const dtn::data::EID &eid) throw (NodeNotAvailableException);

                        void updateNeighbor(const dtn::core::Node &n);

                        virtual const std::string getName() const;

                        void getStats(dtn::net::ConvergenceLayer::stats_data &data);
                        void resetStats();

                protected:
                        void discovered(const dtn::core::Node &node);

                        virtual void componentUp() throw ();
                        virtual void componentDown() throw ();

                private:
                        void check_unavailable();

                        void check_available();

                        void check_autoconnect();

                        bool isReachable(const dtn::core::Node &node) throw ();

                        dtn::core::Node& getNode(const dtn::data::EID &eid) throw (NodeNotAvailableException);

                        // mutex for the list of convergence layers
                        ibrcommon::Mutex _cl_lock;

                        // contains all configured convergence layers
                        std::set<ConvergenceLayer*> _cl;
                        std::set<Node::Protocol> _cl_protocols;

                        // dial-up extensions
                        ibrcommon::Mutex _dialup_lock;
                        std::set<P2PDialupExtension*> _dialups;

                        // mutex for the lists of nodes
                        ibrcommon::Mutex _node_lock;

                        // contains all nodes
                        typedef std::map<dtn::data::EID, dtn::core::Node> nodemap;
                        nodemap _nodes;

                        // next timestamp for autoconnect check
                        dtn::data::Timestamp _next_autoconnect;
                };
        }
}

#endif /* CONNECTIONMANAGER_H_ */