DiscoveryBeacon.h

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/*
 * DiscoveryBeacon.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 DISCOVERYBEACON_H_
#define DISCOVERYBEACON_H_

#include <ibrdtn/data/SDNV.h>
#include <ibrdtn/data/EID.h>
#include <ibrdtn/data/BundleString.h>
#include "net/DiscoveryService.h"
#include <string>
#include <list>

namespace dtn
{
        namespace net
        {
                class DiscoveryBeacon
                {
                        enum BEACON_FLAGS_V1
                        {
                                BEACON_NO_FLAGS = 0x00,
                                BEACON_SHORT = 0x01
                        };

                        enum BEACON_FLAGS_V2
                        {
                                BEACON_CONTAINS_EID = 0x01,
                                BEACON_SERVICE_BLOCK = 0x02,
                                BEACON_BLOOMFILTER = 0x04,
                                BEACON_CONTAINS_PERIOD = 0x08
                        };

                public:
                        enum Protocol
                        {
                                DTND_IPDISCOVERY = 0x00,
                                DISCO_VERSION_00 = 0x01,
                                DISCO_VERSION_01 = 0x02
                        };

                        DiscoveryBeacon(const Protocol version = DISCO_VERSION_00, const dtn::data::EID &eid = dtn::data::EID());

                        virtual ~DiscoveryBeacon();

                        typedef std::list<DiscoveryService> service_list;

                        void setEID(const dtn::data::EID &eid);
                        const dtn::data::EID& getEID() const;

                        service_list& getServices();
                        const service_list& getServices() const;
                        void clearServices();
                        void addService(const DiscoveryService &service);
                        const DiscoveryService& getService(const std::string &name) const;
                        DiscoveryService& getService(const std::string &name);

                        std::string toString() const;

                        void setSequencenumber(uint16_t sequence);

                        void setPeriod(const dtn::data::Number& period);
                        const dtn::data::Number& getPeriod() const;
                        bool hasPeriod() const;

                        bool isShort() const;

                private:
                        friend std::ostream &operator<<(std::ostream &stream, const DiscoveryBeacon &announcement);
                        friend std::istream &operator>>(std::istream &stream, DiscoveryBeacon &announcement);

                        unsigned int _version;
                        unsigned char _flags;
                        dtn::data::EID _canonical_eid;
                        uint16_t _sn;
                        dtn::data::BundleString _bloomfilter;
                        dtn::data::Number _period;

                        service_list _services;
                };
        }
}

#endif /* DISCOVERYBEACON_H_ */