void NodeHandshakeExtension::processHandshake(const dtn::data::Bundle &bundle)
{
// read the ecm
const dtn::data::PayloadBlock &p = bundle.find<dtn::data::PayloadBlock>();
ibrcommon::BLOB::Reference ref = p.getBLOB();
NodeHandshake handshake;
// locked within this region
{
ibrcommon::BLOB::iostream s = ref.iostream();
(*s) >> handshake;
}
IBRCOMMON_LOGGER_DEBUG_TAG(NodeHandshakeExtension::TAG, 15) << "handshake received from " << bundle.source.getString() << ": " << handshake.toString() << IBRCOMMON_LOGGER_ENDL;
// if this is a request answer with an summary vector
if (handshake.getType() == NodeHandshake::HANDSHAKE_REQUEST)
{
// create a new request for the summary vector of the neighbor
NodeHandshake response(NodeHandshake::HANDSHAKE_RESPONSE);
// lock the extension list during the processing
(**this).responseHandshake(bundle.source, handshake, response);
IBRCOMMON_LOGGER_DEBUG_TAG(NodeHandshakeExtension::TAG, 15) << "handshake reply to " << bundle.source.getString() << ": " << response.toString() << IBRCOMMON_LOGGER_ENDL;
// create a new bundle with a zero timestamp (+age block)
dtn::data::Bundle answer(true);
// set the source of the bundle
answer.source = _endpoint.getWorkerURI();
// set the destination of the bundle
answer.set(dtn::data::PrimaryBlock::DESTINATION_IS_SINGLETON, true);
answer.destination = bundle.source;
// limit the lifetime to 60 seconds
answer.lifetime = 60;
// set high priority
answer.set(dtn::data::PrimaryBlock::PRIORITY_BIT1, false);
answer.set(dtn::data::PrimaryBlock::PRIORITY_BIT2, true);
dtn::data::PayloadBlock &p = answer.push_back<PayloadBlock>();
ibrcommon::BLOB::Reference ref = p.getBLOB();
// serialize the request into the payload
{
ibrcommon::BLOB::iostream ios = ref.iostream();
(*ios) << response;
}
// add a schl block
dtn::data::ScopeControlHopLimitBlock &schl = answer.push_front<dtn::data::ScopeControlHopLimitBlock>();
schl.setLimit(1);
// request compression
answer.set(dtn::data::PrimaryBlock::IBRDTN_REQUEST_COMPRESSION, true);
// transfer the bundle to the neighbor
_endpoint.send(answer);
// call handshake completed event
NodeHandshakeEvent::raiseEvent( NodeHandshakeEvent::HANDSHAKE_REPLIED, bundle.source.getNode() );
}
else if (handshake.getType() == NodeHandshake::HANDSHAKE_RESPONSE)
{
// walk through all extensions to process the contents of the response
(**this).processHandshake(bundle.source, handshake);
// call handshake completed event
NodeHandshakeEvent::raiseEvent( NodeHandshakeEvent::HANDSHAKE_COMPLETED, bundle.source.getNode() );
}
else if (handshake.getType() == NodeHandshake::HANDSHAKE_NOTIFICATION)
{
// create a new request
NodeHandshake request(NodeHandshake::HANDSHAKE_REQUEST);
// walk through all extensions to find out which requests are of interest
(**this).requestHandshake(BROADCAST_ENDPOINT, request);
const NodeHandshake::request_set &rs = handshake.getRequests();
for (NodeHandshake::request_set::const_iterator it = rs.begin(); it != rs.end(); ++it)
{
if (request.hasRequest(*it)) {
// get node endpoint
const dtn::data::EID node = bundle.source.getNode();
// clear 60 second blockage
_endpoint.removeFromBlacklist(node);
// execute handshake
_endpoint.query(node);
return;
}
}
}
}
void NodeHandshakeExtension::processHandshake(const dtn::data::Bundle &bundle)
{
// read the ecm
const dtn::data::PayloadBlock &p = bundle.find<dtn::data::PayloadBlock>();
ibrcommon::BLOB::Reference ref = p.getBLOB();
NodeHandshake handshake;
// locked within this region
{
ibrcommon::BLOB::iostream s = ref.iostream();
(*s) >> handshake;
}
IBRCOMMON_LOGGER_DEBUG_TAG(NodeHandshakeExtension::TAG, 15) << "handshake received from " << bundle.source.getString() << ": " << handshake.toString() << IBRCOMMON_LOGGER_ENDL;
// if this is a request answer with an summary vector
if (handshake.getType() == NodeHandshake::HANDSHAKE_REQUEST)
{
// create a new request for the summary vector of the neighbor
NodeHandshake response(NodeHandshake::HANDSHAKE_RESPONSE);
// lock the extension list during the processing
(**this).responseHandshake(bundle.source, handshake, response);
IBRCOMMON_LOGGER_DEBUG_TAG(NodeHandshakeExtension::TAG, 15) << "handshake reply to " << bundle.source.getString() << ": " << response.toString() << IBRCOMMON_LOGGER_ENDL;
// create a new bundle
dtn::data::Bundle answer;
// set the source of the bundle
answer.source = _endpoint.getWorkerURI();
// set the destination of the bundle
answer.set(dtn::data::PrimaryBlock::DESTINATION_IS_SINGLETON, true);
answer.destination = bundle.source;
// limit the lifetime to 60 seconds
answer.lifetime = 60;
// set high priority
answer.set(dtn::data::PrimaryBlock::PRIORITY_BIT1, false);
answer.set(dtn::data::PrimaryBlock::PRIORITY_BIT2, true);
dtn::data::PayloadBlock &p = answer.push_back<PayloadBlock>();
ibrcommon::BLOB::Reference ref = p.getBLOB();
// serialize the request into the payload
{
ibrcommon::BLOB::iostream ios = ref.iostream();
(*ios) << response;
}
// add a schl block
dtn::data::ScopeControlHopLimitBlock &schl = answer.push_front<dtn::data::ScopeControlHopLimitBlock>();
schl.setLimit(1);
// add an age block (to prevent expiring due to wrong clocks)
answer.push_front<dtn::data::AgeBlock>();
// transfer the bundle to the neighbor
_endpoint.send(answer);
// call handshake completed event
NodeHandshakeEvent::raiseEvent( NodeHandshakeEvent::HANDSHAKE_REPLIED, bundle.source.getNode() );
}
else if (handshake.getType() == NodeHandshake::HANDSHAKE_RESPONSE)
{
// walk through all extensions to process the contents of the response
(**this).processHandshake(bundle.source, handshake);
// call handshake completed event
NodeHandshakeEvent::raiseEvent( NodeHandshakeEvent::HANDSHAKE_COMPLETED, bundle.source.getNode() );
}
}
void NodeHandshakeExtension::processHandshake(const dtn::data::Bundle &bundle)
{
// read the ecm
const dtn::data::PayloadBlock &p = bundle.find<dtn::data::PayloadBlock>();
ibrcommon::BLOB::Reference ref = p.getBLOB();
NodeHandshake handshake;
// locked within this region
{
ibrcommon::BLOB::iostream s = ref.iostream();
(*s) >> handshake;
}
IBRCOMMON_LOGGER_DEBUG_TAG(NodeHandshakeExtension::TAG, 15) << "handshake received from " << bundle.source.getString() << ": " << handshake.toString() << IBRCOMMON_LOGGER_ENDL;
// if this is a request answer with an summary vector
if (handshake.getType() == NodeHandshake::HANDSHAKE_REQUEST)
{
// create a new request for the summary vector of the neighbor
NodeHandshake response(NodeHandshake::HANDSHAKE_RESPONSE);
// lock the extension list during the processing
(**this).responseHandshake(bundle.source, handshake, response);
IBRCOMMON_LOGGER_DEBUG_TAG(NodeHandshakeExtension::TAG, 15) << "handshake reply to " << bundle.source.getString() << ": " << response.toString() << IBRCOMMON_LOGGER_ENDL;
// create a new bundle with a zero timestamp (+age block)
dtn::data::Bundle answer(true);
// set the source of the bundle
answer.source = _endpoint.getWorkerURI();
// set the destination of the bundle
answer.set(dtn::data::PrimaryBlock::DESTINATION_IS_SINGLETON, true);
answer.destination = bundle.source;
// limit the lifetime to 60 seconds
answer.lifetime = 60;
// set high priority
answer.set(dtn::data::PrimaryBlock::PRIORITY_BIT1, false);
answer.set(dtn::data::PrimaryBlock::PRIORITY_BIT2, true);
dtn::data::PayloadBlock &p = answer.push_back<PayloadBlock>();
ibrcommon::BLOB::Reference ref = p.getBLOB();
// serialize the request into the payload
{
ibrcommon::BLOB::iostream ios = ref.iostream();
(*ios) << response;
}
// add a schl block
dtn::data::ScopeControlHopLimitBlock &schl = answer.push_front<dtn::data::ScopeControlHopLimitBlock>();
schl.setLimit(1);
#ifdef IBRDTN_SUPPORT_COMPRESSION
// compress bundle if requested
if (handshake.hasRequest(NodeHandshakeItem::REQUEST_COMPRESSED_ANSWER))
{
try {
dtn::data::CompressedPayloadBlock::compress(answer, dtn::data::CompressedPayloadBlock::COMPRESSION_ZLIB);
} catch (const ibrcommon::Exception &ex) {
IBRCOMMON_LOGGER_TAG(TAG, warning) << "compression of bundle failed: " << ex.what() << IBRCOMMON_LOGGER_ENDL;
};
}
#endif
// transfer the bundle to the neighbor
_endpoint.send(answer);
// call handshake completed event
NodeHandshakeEvent::raiseEvent( NodeHandshakeEvent::HANDSHAKE_REPLIED, bundle.source.getNode() );
}
else if (handshake.getType() == NodeHandshake::HANDSHAKE_RESPONSE)
{
// walk through all extensions to process the contents of the response
(**this).processHandshake(bundle.source, handshake);
// call handshake completed event
NodeHandshakeEvent::raiseEvent( NodeHandshakeEvent::HANDSHAKE_COMPLETED, bundle.source.getNode() );
}
}