std::string KeyExchangeSession::getSessionKey(const dtn::data::EID &peer, unsigned int uniqueId)
		{
			// generate session key
			std::stringstream sstm;
			sstm << uniqueId << "." << peer.getString();

			return sstm.str();
		}
Example #2
0
		void NativeSession::removeRegistration(const dtn::data::EID &eid) throw (NativeSessionException)
		{
			// error checking
			if (eid == dtn::data::EID())
			{
				throw NativeSessionException("given endpoint is not acceptable");
			}
			else
			{
				_registration.unsubscribe(eid);
			}

			IBRCOMMON_LOGGER_DEBUG_TAG(NativeSession::TAG, 20) << "Registration " << eid.getString() << " removed" << IBRCOMMON_LOGGER_ENDL;
		}
		/**
		 * Transfer one bundle to another node.
		 * @param destination The EID of the other node.
		 * @param id The ID of the bundle to transfer. This bundle must be stored in the storage.
		 */
		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((**this).getNeighborDB());

				// get the neighbor entry for the next hop
				NeighborDatabase::NeighborEntry &entry = (**this).getNeighborDB().get(destination, true);

				// 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().getConnectionManager().queue(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((**this).getNeighborDB());

				// get the neighbor entry for the next hop
				NeighborDatabase::NeighborEntry &entry = (**this).getNeighborDB().get(destination);

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

				// and abort the query
				throw NeighborDatabase::NeighborNotAvailableException();
			} catch (const ibrcommon::Exception &e) {
				// ignore any other error
			}
		}
		void NodeHandshakeExtension::HandshakeEndpoint::query(const dtn::data::EID &origin)
		{
			{
				ibrcommon::MutexLock l(_blacklist_lock);
				// only query once each 60 seconds
				if (_blacklist[origin] > dtn::utils::Clock::getUnixTimestamp()) return;
				_blacklist[origin] = dtn::utils::Clock::getUnixTimestamp() + 60;
			}

			// create a new request for the summary vector of the neighbor
			NodeHandshake request(NodeHandshake::HANDSHAKE_REQUEST);

			// walk through all extensions to generate a request
			(*_callback).requestHandshake(origin, request);

			IBRCOMMON_LOGGER_DEBUG_TAG(NodeHandshakeExtension::TAG, 15) << "handshake query from " << origin.getString() << ": " << request.toString() << IBRCOMMON_LOGGER_ENDL;

			// create a new bundle
			dtn::data::Bundle req;

			// set the source of the bundle
			req.source = getWorkerURI();

			// set the destination of the bundle
			req.set(dtn::data::PrimaryBlock::DESTINATION_IS_SINGLETON, true);

			if (origin.isCompressable())
				req.destination = origin.add(origin.getDelimiter() + "50");
			else
				req.destination = origin.add(origin.getDelimiter() + "routing");

			// limit the lifetime to 60 seconds
			req.lifetime = 60;

			// set high priority
			req.set(dtn::data::PrimaryBlock::PRIORITY_BIT1, false);
			req.set(dtn::data::PrimaryBlock::PRIORITY_BIT2, true);

			dtn::data::PayloadBlock &p = req.push_back<PayloadBlock>();
			ibrcommon::BLOB::Reference ref = p.getBLOB();

			// serialize the request into the payload
			{
				ibrcommon::BLOB::iostream ios = ref.iostream();
				(*ios) << request;
			}

			// add a schl block
			dtn::data::ScopeControlHopLimitBlock &schl = req.push_front<dtn::data::ScopeControlHopLimitBlock>();
			schl.setLimit(1);

			// add an age block (to prevent expiring due to wrong clocks)
			req.push_front<dtn::data::AgeBlock>();

			// send the bundle
			transmit(req);
		}
Example #5
0
		void NodeHandshakeExtension::HandshakeEndpoint::query(const dtn::data::EID &origin)
		{
			{
				ibrcommon::MutexLock l(_blacklist_lock);
				// only query once each 60 seconds
				if (_blacklist[origin] > dtn::utils::Clock::getMonotonicTimestamp()) return;
				_blacklist[origin] = dtn::utils::Clock::getMonotonicTimestamp() + 60;
			}

			// create a new request for the summary vector of the neighbor
			NodeHandshake request(NodeHandshake::HANDSHAKE_REQUEST);

#ifdef IBRDTN_SUPPORT_COMPRESSION
			// request compressed answer
			request.addRequest(NodeHandshakeItem::REQUEST_COMPRESSED_ANSWER);
#endif

			// walk through all extensions to generate a request
			(*_callback).requestHandshake(origin, request);

			IBRCOMMON_LOGGER_DEBUG_TAG(NodeHandshakeExtension::TAG, 15) << "handshake query from " << origin.getString() << ": " << request.toString() << IBRCOMMON_LOGGER_ENDL;

			// create a new bundle with a zero timestamp (+age block)
			dtn::data::Bundle req(true);

			// set the source of the bundle
			req.source = getWorkerURI();

			// set the destination of the bundle
			req.set(dtn::data::PrimaryBlock::DESTINATION_IS_SINGLETON, true);
			req.destination = origin;

			// set destination application
			req.destination.setApplication("routing");

			// limit the lifetime to 60 seconds
			req.lifetime = 60;

			// set high priority
			req.set(dtn::data::PrimaryBlock::PRIORITY_BIT1, false);
			req.set(dtn::data::PrimaryBlock::PRIORITY_BIT2, true);

			dtn::data::PayloadBlock &p = req.push_back<PayloadBlock>();
			ibrcommon::BLOB::Reference ref = p.getBLOB();

			// serialize the request into the payload
			{
				ibrcommon::BLOB::iostream ios = ref.iostream();
				(*ios) << request;
			}

			// add a schl block
			dtn::data::ScopeControlHopLimitBlock &schl = req.push_front<dtn::data::ScopeControlHopLimitBlock>();
			schl.setLimit(1);

			// send the bundle
			transmit(req);
		}