/** \brief respond to specific FaceQuery requests
* \retval true the Interest matches one of the defined patterns and is responded
* \retval false the Interest is not responded
*/
bool
respondFaceQuery(const Interest& interest)
{
using ndn::nfd::FacePersistency;
using ndn::nfd::FaceQueryFilter;
using ndn::nfd::FaceStatus;
if (!Name("/localhost/nfd/faces/query").isPrefixOf(interest.getName())) {
return false;
}
BOOST_CHECK_EQUAL(interest.getName().size(), 5);
FaceQueryFilter filter(interest.getName().at(4).blockFromValue());
if (filter == FaceQueryFilter().setFaceId(10156)) {
FaceStatus faceStatus;
faceStatus.setFaceId(10156)
.setLocalUri("tcp4://151.26.163.27:22967")
.setRemoteUri("tcp4://198.57.27.40:6363")
.setFacePersistency(FacePersistency::FACE_PERSISTENCY_PERSISTENT);
this->sendDataset(interest.getName(), faceStatus);
return true;
}
if (filter == FaceQueryFilter().setRemoteUri("tcp4://32.121.182.82:6363")) {
FaceStatus faceStatus;
faceStatus.setFaceId(2249)
.setLocalUri("tcp4://30.99.87.98:31414")
.setRemoteUri("tcp4://32.121.182.82:6363")
.setFacePersistency(FacePersistency::FACE_PERSISTENCY_PERSISTENT);
this->sendDataset(interest.getName(), faceStatus);
return true;
}
if (filter == FaceQueryFilter().setFaceId(23728)) {
this->sendEmptyDataset(interest.getName());
return true;
}
if (filter == FaceQueryFilter().setRemoteUri("udp4://225.131.75.231:56363")) {
FaceStatus faceStatus1, faceStatus2;
faceStatus1.setFaceId(6720)
.setLocalUri("udp4://202.83.168.28:56363")
.setRemoteUri("udp4://225.131.75.231:56363")
.setFacePersistency(FacePersistency::FACE_PERSISTENCY_PERMANENT);
faceStatus2.setFaceId(31066)
.setLocalUri("udp4://25.90.26.32:56363")
.setRemoteUri("udp4://225.131.75.231:56363")
.setFacePersistency(FacePersistency::FACE_PERSISTENCY_PERMANENT);
this->sendDataset(interest.getName(), faceStatus1, faceStatus2);
return true;
}
return false;
}
void
afterFetchedFaceStatusInformation(const shared_ptr<OBufferStream>& buffer, const Name& remoteName)
{
ConstBufferPtr buf = buffer->buf();
Block block;
size_t offset = 0;
std::string currentTime;
std::tm ctime;
std::stringstream realEpochTime;
ndn::time::system_clock::TimePoint realCurrentTime = ndn::time::system_clock::now();
std::string currentTimeStr = ndn::time::toString(realCurrentTime, "%Y-%m-%dT%H:%M:%S%F");
strptime(currentTimeStr.c_str(), "%FT%T%Z", &ctime);
std::string stime(currentTimeStr);
std::time_t realEpochSeconds = std::mktime(&ctime);
std::size_t pos = stime.find(".");
std::string realEpochMilli = stime.substr(pos+1);
realEpochTime << realEpochSeconds << "." << realEpochMilli;
CollectorData content;
currentTime = realEpochTime.str();
while (offset < buf->size())
{
bool ok = Block::fromBuffer(buf, offset, block);
if (!ok)
{
std::cerr << "ERROR: cannot decode FaceStatus TLV" << std::endl;
break;
}
offset += block.size();
nfd::FaceStatus faceStatus(block);
// take only udp4 and tcp4 faces at the moment
std::string remoteUri = faceStatus.getRemoteUri();
if(remoteUri.compare(0,4,"tcp4") != 0 &&
remoteUri.compare(0,4,"udp4") != 0)
continue;
// take the ip from uri (remove tcp4:// and everything after ':'
std::size_t strPos = remoteUri.find_last_of(":");
std::string remoteIp = remoteUri.substr(7,strPos - 7);
std::unordered_set<std::string>::const_iterator got = m_remoteLinks.find(remoteIp);
// the link is not requested by the server
if(got == m_remoteLinks.end())
continue;
FaceStatus linkStatus;
linkStatus.setTx(faceStatus.getNOutBytes());
linkStatus.setRx(faceStatus.getNInBytes());
linkStatus.setFaceId(faceStatus.getFaceId());
linkStatus.setLinkIp(remoteIp);
linkStatus.setTimestamp(currentTime);
// remove the remoteIP from the list of links to search and add it to the data packet
m_remoteLinks.erase(remoteIp);
content.add(linkStatus);
if (DEBUG)
std::cout << "about to send back " << linkStatus.getFaceId() << ": " << linkStatus.getRx() << ", " << linkStatus.getTx() << ", " << linkStatus.getLinkIp() << std::endl;
}
if (content.size() != 0)
{
ndn::shared_ptr<ndn::Data> data = ndn::make_shared<ndn::Data>(remoteName);
data->setContent(content.wireEncode());
data->setFreshnessPeriod(time::seconds(0));
m_keyChain.sign(*data);
m_face.put(*data);
}
}
