DiscoveryAgent.h

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/*
 * DiscoveryAgent.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 DISCOVERYAGENT_H_
#define DISCOVERYAGENT_H_

#include "Configuration.h"
#include "Component.h"
#include "core/EventReceiver.h"
#include "core/Node.h"
#include "core/TimeEvent.h"
#include "core/GlobalEvent.h"
#include "net/DiscoveryBeacon.h"
#include "net/DiscoveryBeaconHandler.h"
#include "net/DiscoveryService.h"

#include <ibrdtn/data/Number.h>
#include <ibrcommon/net/vinterface.h>

#include <list>

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

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

                        void onBeaconReceived(const DiscoveryBeacon &beacon);

                        void registerService(const ibrcommon::vinterface &iface, dtn::net::DiscoveryBeaconHandler *handler);
                        void registerService(dtn::net::DiscoveryBeaconHandler *handler);

                        void unregisterService(const ibrcommon::vinterface &iface, const dtn::net::DiscoveryBeaconHandler *handler);
                        void unregisterService(const dtn::net::DiscoveryBeaconHandler *handler);

                        DiscoveryBeacon obtainBeacon() const;

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

                        virtual const std::string getName() const;

                private:
                        void onAdvertise();

                        const dtn::daemon::Configuration::Discovery &_config;

                        bool _enabled;
                        uint16_t _sn;
                        dtn::data::Timestamp _adv_next;
                        unsigned int _beacon_period;

                        ibrcommon::Mutex _provider_lock;

                        typedef std::list<dtn::net::DiscoveryBeaconHandler*> handler_list;
                        typedef std::map<ibrcommon::vinterface, handler_list> handler_map;
                        typedef std::pair<ibrcommon::vinterface, handler_list> handler_map_entry;

                        handler_map _providers;

                        const ibrcommon::vinterface _any_iface;
                };
        }
}

#endif /* DISCOVERYAGENT_H_ */