source: source/ariba/communication/BaseCommunication.h @ 4983

// [License]
// The Ariba-Underlay Copyright
//
// Copyright (c) 2008-2009, Institute of Telematics, UniversitÀt Karlsruhe (TH)
//
// Institute of Telematics
// UniversitÀt Karlsruhe (TH)
// Zirkel 2, 76128 Karlsruhe
// Germany
//
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// modification, are permitted provided that the following conditions are
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//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
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// [License]

#ifndef BASECOMMUNICATION_H_
#define BASECOMMUNICATION_H_

#include <ext/hash_map>
#include <ext/hash_set>
#include <map>
#include <set>
#include <vector>
#include <iostream>
#include <algorithm>
#include <boost/foreach.hpp>

#include "ariba/utility/types.h"
#include "ariba/utility/messages.h"
#include "ariba/utility/logging/Logging.h"
#include "ariba/utility/misc/Demultiplexer.hpp"

#include "ariba/communication/CommunicationEvents.h"
#include "ariba/communication/EndpointDescriptor.h"
#include "ariba/communication/networkinfo/NetworkChangeInterface.h"
#include "ariba/communication/networkinfo/NetworkChangeDetection.h"
#include "ariba/communication/networkinfo/NetworkInformation.h"
#include "ariba/communication/networkinfo/AddressInformation.h"
#include "ariba/communication/messages/AribaBaseMsg.h"
#include "ariba/communication/modules/transport/TransportProtocol.h"
#include "ariba/communication/modules/network/NetworkProtocol.h"
#include "ariba/communication/modules/network/NetworkLocator.h"

#ifndef UNDERLAY_OMNET
  #include "ariba/communication/modules/transport/tcp/TCPTransport.h"
  #include "ariba/communication/modules/network/ip/IPv4NetworkProtocol.h"
#endif

using __gnu_cxx::hash_set;
using __gnu_cxx::hash_map;

using std::cout;
using std::set;
using std::map;
using std::vector;
using std::pair;
using std::make_pair;
using std::find;

using ariba::communication::NetworkChangeDetection;
using ariba::communication::NetworkChangeInterface;
using ariba::communication::NetworkInterfaceList;
using ariba::communication::NetworkInformation;
using ariba::communication::AddressInformation;
using ariba::communication::AddressList;
using ariba::communication::AribaBaseMsg;
using ariba::communication::CommunicationEvents;

using ariba::utility::Demultiplexer;
using ariba::utility::QoSParameterSet;
using ariba::utility::SecurityParameterSet;
using ariba::utility::Address;
using ariba::utility::LinkID;
using ariba::utility::LinkIDs;
using ariba::utility::Message;
using ariba::utility::MessageReceiver;
using ariba::utility::seqnum_t;

using ariba::communication::TransportProtocol;
using ariba::communication::NetworkProtocol;
using ariba::communication::NetworkLocator;
#ifndef UNDERLAY_OMNET
  using ariba::communication::IPv4NetworkProtocol;
  using ariba::communication::TCPTransport;
#endif

namespace ariba {
namespace communication {

/**
 * This class implements the Ariba Base Communication<br />
 *
 * Its primary task is to provide an abstraction to existing
 * protocols and addressing schemes.
 *
 * @author Sebastian Mies, Christoph Mayer
 */
class BaseCommunication : public MessageReceiver, NetworkChangeInterface {
        use_logging_h(BaseCommunication);
public:

        /**
         * Default ctor that just creates an empty
         * non functional base communication
         */
        BaseCommunication();

        /**
         * Default dtor that does nothing
         */
        virtual ~BaseCommunication();

        /**
         * Startup the base communication, start modules etc.
         */
        void start(const NetworkLocator* _locallocator, const uint16_t _listenport);

        /**
         * stop the base communication, stop modules etc.
         */
        void stop();

        /*
         * Check whether the base communication has been started up
         */
        bool isStarted();


        /**
         * Establishes a link to another end-point.
         */
        const LinkID establishLink(
                const EndpointDescriptor& descriptor,
                const LinkID& linkid = LinkID::UNSPECIFIED,
                const QoSParameterSet& qos = QoSParameterSet::DEFAULT,
                const SecurityParameterSet& sec = SecurityParameterSet::DEFAULT
        );

        /**
         * Drops a link.
         *
         * @param The link id of the link that should be dropped
         */
        void dropLink(const LinkID link);

        /**
         * Sends a message though an existing link to an end-point.
         *
         * @param lid The link identifier
         * @param message The message to be sent
         * @return A sequence number for this message
         */
        seqnum_t sendMessage(const LinkID lid, const Message* message);

        /**
         * Returns the end-point descriptor
         *
         * @param link the link id of the requested end-point
         * @return The end-point descriptor of the link's end-point
         */
        const EndpointDescriptor& getEndpointDescriptor( const LinkID link = LinkID::UNSPECIFIED ) const;

        /**
         * Get local links to the given endpoint of all local link
         * using the default parameter EndpointDescriptor::UNSPECIFIED
         * @param ep The remote endpoint to get all links to.
         * @return List of LinkID
         */
        LinkIDs getLocalLinks( const EndpointDescriptor& ep = EndpointDescriptor::UNSPECIFIED ) const;

        /**
         * Registers a receiver.
         *
         * @param _receiver The receiving side
         */
        void registerMessageReceiver( MessageReceiver* _receiver );

        /**
         * Unregister a receiver.
         *
         * @param _receiver The receiving side
         */
        void unregisterMessageReceiver( MessageReceiver* _receiver );

        void registerEventListener( CommunicationEvents* _events );
        void unregisterEventListener( CommunicationEvents* _events );

protected:

        /**
         * Called from the Transport when async items
         * from the SystemQueue are delivered
         */
        virtual bool receiveMessage( const Message* message, const LinkID& link, const NodeID& node );

        /**
         * Called when a network interface change happens
         */
        virtual void onNetworkChange( const NetworkChangeInterface::NetworkChangeInfo& info );

private:

        /**
         * A link descriptor consisting of the
         * end-point descriptor and currently used locator and
         * message receiver
         */
        class LinkDescriptor {
        public:
                static const LinkDescriptor UNSPECIFIED;

                LinkDescriptor() :
                        localLink(LinkID::UNSPECIFIED),
                        localLocator(NULL),
                        remoteLink(LinkID::UNSPECIFIED),
                        remoteLocator(NULL),
                        remoteEndpoint(EndpointDescriptor::UNSPECIFIED),
                        linkup(false) {
                }

                LinkDescriptor(const LinkID& _localLink, const NetworkLocator*& _localLocator,
                                const LinkID& _remoteLink, const NetworkLocator*& _remoteLocator,
                                const EndpointDescriptor& _remoteEndpoint, bool _linkup ) :
                        localLink(_localLink),
                        localLocator(_localLocator),
                        remoteLink(_remoteLink),
                        remoteLocator(_remoteLocator),
                        remoteEndpoint(_remoteEndpoint),
                        linkup(_linkup) {
                }

                LinkDescriptor( const LinkDescriptor& desc ) :
                        localLink(desc.localLink),
                        localLocator(desc.localLocator),
                        remoteLink(desc.remoteLink),
                        remoteLocator(desc.remoteLocator),
                        remoteEndpoint(desc.remoteEndpoint),
                        linkup(desc.linkup) {
                }

                bool isUnspecified() const {
                        return (this == &UNSPECIFIED);
                }

                LinkID                                  localLink;
                const NetworkLocator*   localLocator;
                LinkID                                  remoteLink;
                const NetworkLocator*   remoteLocator;
                EndpointDescriptor              remoteEndpoint;

                bool                                    linkup;
        };

        /**
         * Link management: add a link
         */
        void addLink( const LinkDescriptor& link );

        /**
         * Link management: remove alink
         */
        void removeLink( const LinkID& localLink );

        /**
         * Link management: get link information using the local link
         */
        LinkDescriptor& queryLocalLink( const LinkID& localLink ) const;

        /**
         * Link management: get link information using the remote link
         */
        LinkDescriptor& queryRemoteLink( const LinkID& remoteLink ) const;

        /**
         * Link management: list of links
         */
        typedef vector<LinkDescriptor> LinkSet;

        /**
         * Link management: the set of currently managed links
         */
        LinkSet linkSet;

        /**
         * The message receiver
         */
        MessageReceiver* messageReceiver;

        /**
         * The local end-point descriptor
         */
        EndpointDescriptor localDescriptor;

        /**
         * Network information and protocol
         */
        NetworkProtocol* network;

        /**
         * Transport information and protocol
         */
        TransportProtocol* transport;

#ifndef UNDERLAY_OMNET
        /**
         * Detect changes in the routing/interface, etc.
         * stuff needed for mobility detection
         */
        NetworkChangeDetection networkMonitor;
#endif

        /**
         * The local listen port
         */
        uint16_t listenport;

        typedef set<CommunicationEvents*> EventListenerSet;
        EventListenerSet eventListener;

        seqnum_t currentSeqnum;

        /**
         * state of the base communication
         */
        bool basecommStarted;

};

}} // namespace ariba, communication

#endif /*BASECOMMUNICATION_H_*/