/** @brief determines if entry can satisfy interest
* @param hash SHA256 hash of PublisherPublicKeyLocator if exists in interest, otherwise ignored
*/
static bool
matchesSimpleSelectors(const Interest& interest, ndn::ConstBufferPtr& hash,
const Index::Entry& entry)
{
const Name& fullName = entry.getName();
if (!interest.getName().isPrefixOf(fullName))
return false;
size_t nSuffixComponents = fullName.size() - interest.getName().size();
if (interest.getMinSuffixComponents() >= 0 &&
nSuffixComponents < static_cast<size_t>(interest.getMinSuffixComponents()))
return false;
if (interest.getMaxSuffixComponents() >= 0 &&
nSuffixComponents > static_cast<size_t>(interest.getMaxSuffixComponents()))
return false;
if (!interest.getExclude().empty() &&
entry.getName().size() > interest.getName().size() &&
interest.getExclude().isExcluded(entry.getName()[interest.getName().size()])) {
return false;
}
if (!interest.getPublisherPublicKeyLocator().empty())
{
if (*entry.getKeyLocatorHash() != *hash)
return false;
}
return true;
}
shared_ptr<Data> StorageEngineImpl::read(const Interest &interest)
{
shared_ptr<Data> data;
#if HAVE_PERSISTENT_STORAGE
bool canBePrefix = interest.getCanBePrefix();
if (canBePrefix)
{
// extract by prefix match
Name prefix = interest.getName(), keyName;
auto it = db_->NewIterator(db_namespace::ReadOptions());
std::string key = "";
bool checkMaxSuffixComponents = interest.getMaxSuffixComponents() != -1;
bool checkMinSuffixComponents = interest.getMinSuffixComponents() != -1;
for (it->Seek(prefix.toUri());
it->Valid() && it->key().starts_with(prefix.toUri());
it->Next())
{
if (checkMaxSuffixComponents || checkMinSuffixComponents)
{
keyName = Name(it->key().ToString());
int nSuffixComponents = keyName.size() - prefix.size();
bool passCheck = false;
if (checkMaxSuffixComponents &&
nSuffixComponents <= interest.getMaxSuffixComponents())
passCheck = true;
if (checkMinSuffixComponents &&
nSuffixComponents >= interest.getMinSuffixComponents())
passCheck = true;
if (passCheck)
key = it->key().ToString();
}
else
key = it->key().ToString();
}
if (key != "")
data = get(Name(key));
delete it;
}
else
data = get(interest.getName());
#endif
return data;
}
static vector<string>
dumpInterest(const Interest& interest)
{
vector<string> result;
result.push_back(dump("name:", interest.getName().toUri()));
result.push_back(dump("minSuffixComponents:",
interest.getMinSuffixComponents() >= 0 ?
toString(interest.getMinSuffixComponents()) : "<none>"));
result.push_back(dump("maxSuffixComponents:",
interest.getMaxSuffixComponents() >= 0 ?
toString(interest.getMaxSuffixComponents()) : "<none>"));
if ((int)interest.getKeyLocator().getType() >= 0) {
if (interest.getKeyLocator().getType() == ndn_KeyLocatorType_KEY_LOCATOR_DIGEST)
result.push_back(dump("keyLocator: KeyLocatorDigest:",
interest.getKeyLocator().getKeyData().toHex()));
else if (interest.getKeyLocator().getType() == ndn_KeyLocatorType_KEYNAME)
result.push_back(dump("keyLocator: KeyName:",
interest.getKeyLocator().getKeyName().toUri()));
else
result.push_back(dump("keyLocator: <unrecognized KeyLocatorType"));
}
else
result.push_back(dump("keyLocator: <none>"));
result.push_back(dump("exclude:",
interest.getExclude().size() > 0 ? interest.getExclude().toUri() :
"<none>"));
result.push_back(dump("childSelector:",
interest.getChildSelector() >= 0 ? toString(interest.getChildSelector()) :
"<none>"));
result.push_back(dump("mustBeFresh:",
interest.getMustBeFresh() ? "True" : "False"));
result.push_back(dump("nonce:",
interest.getNonce().size() == 0 ? "<none>" :
interest.getNonce().toHex()));
result.push_back(dump("lifetimeMilliseconds:",
interest.getInterestLifetimeMilliseconds() < 0 ? "<none>" :
toString(interest.getInterestLifetimeMilliseconds())));
return result;
};
static void dumpInterest(const Interest& interest)
{
cout << "name: " << interest.getName().toUri() << endl;
cout << "minSuffixComponents: ";
if (interest.getMinSuffixComponents() >= 0)
cout << interest.getMinSuffixComponents() << endl;
else
cout << "<none>" << endl;
cout << "maxSuffixComponents: ";
if (interest.getMaxSuffixComponents() >= 0)
cout << interest.getMaxSuffixComponents() << endl;
else
cout << "<none>" << endl;
cout << "keyLocator: ";
if ((int)interest.getKeyLocator().getType() >= 0) {
if (interest.getKeyLocator().getType() == ndn_KeyLocatorType_KEY_LOCATOR_DIGEST)
cout << "KeyLocatorDigest: " << interest.getKeyLocator().getKeyData().toHex() << endl;
else if (interest.getKeyLocator().getType() == ndn_KeyLocatorType_KEYNAME)
cout << "KeyName: " << interest.getKeyLocator().getKeyName().toUri() << endl;
else
cout << "<unrecognized ndn_KeyLocatorType " << interest.getKeyLocator().getType() << ">" << endl;
}
else
cout << "<none>" << endl;
cout << "exclude: "
<< (interest.getExclude().size() > 0 ? interest.getExclude().toUri() : "<none>") << endl;
cout << "lifetimeMilliseconds: ";
if (interest.getInterestLifetimeMilliseconds() >= 0)
cout << interest.getInterestLifetimeMilliseconds() << endl;
else
cout << "<none>" << endl;
cout << "childSelector: ";
if (interest.getChildSelector() >= 0)
cout << interest.getChildSelector() << endl;
else
cout << "<none>" << endl;
cout << "mustBeFresh: " << (interest.getMustBeFresh() ? "true" : "false") << endl;
cout << "nonce: "
<< (interest.getNonce().size() > 0 ? interest.getNonce().toHex() : "<none>") << endl;
}
