RoutingExtension.cpp

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/*
 * RoutingExtension.cpp
 *
 * Copyright (C) 2013 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.
 *
 */

#include "routing/RoutingExtension.h"
#include "routing/BaseRouter.h"
#include "core/BundleCore.h"
#include <ibrcommon/Logger.h>

namespace dtn
{
        namespace routing
        {
                BaseRouter *RoutingExtension::_router = NULL;
                const std::string RoutingExtension::TAG = "RoutingExtension";

                RoutingExtension::RoutingExtension()
                { }

                RoutingExtension::~RoutingExtension()
                { }

                BaseRouter& RoutingExtension::operator*()
                {
                        return *_router;
                }

                void RoutingExtension::transferTo(const dtn::data::EID &destination, const dtn::data::MetaBundle &meta)
                {
                        // acquire the transfer of this bundle, could throw already in transit or no resource left exception
                        {
                                // lock the list of neighbors
                                ibrcommon::MutexLock l(_router->getNeighborDB());

                                // get the neighbor entry for the next hop
                                NeighborDatabase::NeighborEntry &entry = _router->getNeighborDB().get(destination);

                                // acquire the transfer, could throw already in transit or no resource left exception
                                entry.acquireTransfer(meta);
                        }

                        try {
                                // create a new bundle transfer object
                                dtn::net::BundleTransfer transfer(destination, meta);

                                // transfer the bundle to the next hop
                                dtn::core::BundleCore::getInstance().transferTo(transfer);

                                IBRCOMMON_LOGGER_DEBUG_TAG(RoutingExtension::TAG, 20) << "bundle " << meta.toString() << " queued for " << destination.getString() << IBRCOMMON_LOGGER_ENDL;
                        } catch (const dtn::core::P2PDialupException&) {
                                // lock the list of neighbors
                                ibrcommon::MutexLock l(_router->getNeighborDB());

                                // get the neighbor entry for the next hop
                                NeighborDatabase::NeighborEntry &entry = _router->getNeighborDB().get(destination);

                                // release the transfer
                                entry.releaseTransfer(meta);

                                // and abort the query
                                throw NeighborDatabase::NeighborNotAvailableException();
                        }
                }

                bool RoutingExtension::isRouting(const dtn::data::EID &eid)
                {
                        if (eid.getApplication() == "routing")
                        {
                                return true;
                        }
                        else if ((eid.getScheme() == dtn::data::EID::CBHE_SCHEME) && (eid.getApplication() == "50"))
                        {
                                return true;
                        }

                        return false;
                }

        } /* namespace routing */
} /* namespace dtn */