daemon/src/net/DiscoveryAgent.cpp

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/*
 * DiscoveryAgent.cpp
 *
 *  Created on: 14.09.2009
 *      Author: morgenro
 */

#include "net/DiscoveryAgent.h"
#include "net/DiscoveryService.h"
#include "net/DiscoveryAnnouncement.h"
#include "core/TimeEvent.h"
#include "core/NodeEvent.h"
#include <ibrdtn/utils/Utils.h>
#include "Configuration.h"
#include <ibrcommon/Logger.h>

using namespace dtn::core;

namespace dtn
{
        namespace net
        {
                DiscoveryAgent::DiscoveryAgent(const dtn::daemon::Configuration::Discovery &config)
                 : _config(config), _sn(0)
                {
                }

                DiscoveryAgent::~DiscoveryAgent()
                {
                }

                void DiscoveryAgent::addService(std::string name, std::string parameters)
                {
                        DiscoveryService service(name, parameters);
                        _services.push_back(service);
                }

                void DiscoveryAgent::addService(DiscoveryServiceProvider *provider)
                {
                        DiscoveryService service(provider);
                        _services.push_back(service);
                }

                void DiscoveryAgent::received(const DiscoveryAnnouncement &announcement)
                {
                        // calculating RTT with the service timestamp
                        size_t rtt = 2700;

                        // convert the announcement into NodeEvents
                        Node n(Node::NODE_FLOATING, rtt);

                        // set the EID and some parameters of this Node
                        n.setEID(announcement.getEID());

                        // get configured timeout value
                        n.setTimeout( _config.timeout() );

                        const list<DiscoveryService> services = announcement.getServices();
                        for (list<DiscoveryService>::const_iterator iter = services.begin(); iter != services.end(); iter++)
                        {
                                const DiscoveryService &s = (*iter);

                                if (s.getName() == "tcpcl")
                                {
                                        n.add(Node::URI(s.getParameters(), Node::CONN_TCPIP));
                                }
                                else if (s.getName() == "udpcl")
                                {
                                        n.add(Node::URI(s.getParameters(), Node::CONN_UDPIP));
                                }
                                else
                                {
                                        n.add(Node::Attribute(s.getName(), s.getParameters()));
                                }
                        }

                        // create and raise a new event
                        dtn::core::NodeEvent::raise(n, NODE_INFO_UPDATED);
                }

                void DiscoveryAgent::timeout()
                {
                        // check if announcements are enabled
                        if (_config.announce())
                        {
                                IBRCOMMON_LOGGER_DEBUG(25) << "send discovery announcement" << IBRCOMMON_LOGGER_ENDL;

                                sendAnnoucement(_sn, _services);

                                // increment sequencenumber
                                _sn++;
                        }
                }
        }
}