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();
}
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);
}
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);
}
