void DeliveryPredictabilityMap::update(const dtn::data::EID &host_b, const DeliveryPredictabilityMap &dpm, const float &p_encounter_first)
{
float p_ab = 0.0f;
try {
p_ab = get(host_b);
} catch (const DeliveryPredictabilityMap::ValueNotFoundException&) {
p_ab = p_encounter_first;
}
/**
* Calculate transitive values
*/
for (predictmap::const_iterator it = dpm._predictmap.begin(); it != dpm._predictmap.end(); ++it)
{
const dtn::data::EID &host_c = it->first;
const float &p_bc = it->second;
// do not update values for the origin host
if (host_b.sameHost(host_c)) continue;
// do not process values with our own EID
if (dtn::core::BundleCore::local.sameHost(host_c)) continue;
predictmap::iterator dp_it;
if ((dp_it = _predictmap.find(host_c)) != _predictmap.end()) {
dp_it->second = std::max(dp_it->second, p_ab * p_bc * _beta);
} else {
_predictmap[host_c] = p_ab * p_bc * _beta;
}
}
}
void PayloadIntegrityBlock::sign(dtn::data::Bundle &bundle, const SecurityKey &key, const dtn::data::EID& destination)
{
PayloadIntegrityBlock& pib = bundle.push_front<PayloadIntegrityBlock>();
pib.set(REPLICATE_IN_EVERY_FRAGMENT, true);
// check if this is a fragment
if (bundle.get(dtn::data::PrimaryBlock::FRAGMENT))
{
dtn::data::PayloadBlock& plb = bundle.find<dtn::data::PayloadBlock>();
ibrcommon::BLOB::Reference blobref = plb.getBLOB();
ibrcommon::BLOB::iostream stream = blobref.iostream();
addFragmentRange(pib._ciphersuite_params, bundle.fragmentoffset, stream.size());
}
// set the source and destination address of the new block
if (!key.reference.sameHost(bundle.source)) pib.setSecuritySource( key.reference );
if (!destination.sameHost(bundle.destination)) pib.setSecurityDestination( destination );
pib.setResultSize(key);
pib.setCiphersuiteId(SecurityBlock::PIB_RSA_SHA256);
pib._ciphersuite_flags |= CONTAINS_SECURITY_RESULT;
std::string sign = calcHash(bundle, key, pib);
pib._security_result.set(SecurityBlock::integrity_signature, sign);
}