void NdnRtcNamespace::getSegmentationNumbers(const ndn::Name &prefix,
PacketNumber &packetNumber,
SegmentNumber &segmentNumber)
{
int p = -1;
packetNumber = -1;
segmentNumber = -1;
if (isDeltaFramesPrefix(prefix))
{
p = findComponent(prefix, NameComponentStreamFramesDelta);
}
else if (isKeyFramePrefix(prefix))
{
p = findComponent(prefix, NameComponentStreamFramesKey);
}
if (p > 0)
{
if (p+1 < prefix.size())
{
Name::Component packetNoComp = prefix.get(p+1);
packetNumber = NdnRtcUtils::frameNumber(packetNoComp);
}
if (p+3 < prefix.size())
{
Name::Component segmentNoComp = prefix.get(p+3);
segmentNumber = NdnRtcUtils::segmentNumber(segmentNoComp);
}
}
}
void
HelloProtocol::processInterestTimedOut(const ndn::Interest& interest)
{
/* interest name: /<neighbor>/NLSR/INFO/<router> */
const ndn::Name interestName(interest.getName());
_LOG_DEBUG("Interest timed out for Name: " << interestName);
if (interestName.get(-2).toUri() != INFO_COMPONENT) {
return;
}
ndn::Name neighbor = interestName.getPrefix(-3);
_LOG_DEBUG("Neighbor: " << neighbor);
m_nlsr.getAdjacencyList().incrementTimedOutInterestCount(neighbor);
Adjacent::Status status = m_nlsr.getAdjacencyList().getStatusOfNeighbor(neighbor);
uint32_t infoIntTimedOutCount =
m_nlsr.getAdjacencyList().getTimedOutInterestCount(neighbor);
_LOG_DEBUG("Status: " << status);
_LOG_DEBUG("Info Interest Timed out: " << infoIntTimedOutCount);
if ((infoIntTimedOutCount < m_nlsr.getConfParameter().getInterestRetryNumber())) {
/* interest name: /<neighbor>/NLSR/INFO/<router> */
ndn::Name interestName(neighbor);
interestName.append(NLSR_COMPONENT);
interestName.append(INFO_COMPONENT);
interestName.append(m_nlsr.getConfParameter().getRouterPrefix().wireEncode());
expressInterest(interestName,
m_nlsr.getConfParameter().getInterestResendTime());
}
else if ((status == Adjacent::STATUS_ACTIVE) &&
(infoIntTimedOutCount == m_nlsr.getConfParameter().getInterestRetryNumber())) {
m_nlsr.getAdjacencyList().setStatusOfNeighbor(neighbor, Adjacent::STATUS_INACTIVE);
m_nlsr.getLsdb().scheduleAdjLsaBuild();
}
}
void
HelloProtocol::processInterest(const ndn::Name& name,
const ndn::Interest& interest)
{
/* interest name: /<neighbor>/NLSR/INFO/<router> */
const ndn::Name interestName = interest.getName();
_LOG_DEBUG("Interest Received for Name: " << interestName);
if (interestName.get(-2).toUri() != INFO_COMPONENT) {
return;
}
ndn::Name neighbor;
neighbor.wireDecode(interestName.get(-1).blockFromValue());
_LOG_DEBUG("Neighbor: " << neighbor);
if (m_nlsr.getAdjacencyList().isNeighbor(neighbor)) {
ndn::shared_ptr<ndn::Data> data = ndn::make_shared<ndn::Data>();
data->setName(ndn::Name(interest.getName()).appendVersion());
data->setFreshnessPeriod(ndn::time::seconds(10)); // 10 sec
data->setContent(reinterpret_cast<const uint8_t*>(INFO_COMPONENT.c_str()),
INFO_COMPONENT.size());
m_nlsr.getKeyChain().sign(*data, m_nlsr.getDefaultCertName());
_LOG_DEBUG("Sending out data for name: " << interest.getName());
m_nlsr.getNlsrFace().put(*data);
Adjacent *adjacent = m_nlsr.getAdjacencyList().findAdjacent(neighbor);
// If this neighbor was previously inactive, send our own hello interest, too
if (adjacent->getStatus() == Adjacent::STATUS_INACTIVE) {
// We can only do that if the neighbor currently has a face.
if(adjacent->getFaceId() != 0){
/* interest name: /<neighbor>/NLSR/INFO/<router> */
ndn::Name interestName(neighbor);
interestName.append(NLSR_COMPONENT);
interestName.append(INFO_COMPONENT);
interestName.append(m_nlsr.getConfParameter().getRouterPrefix().wireEncode());
expressInterest(interestName,
m_nlsr.getConfParameter().getInterestResendTime());
}
// If the originator of the Interest currently lacks a Face, we
// need to give it one.
else {
registerPrefixes(adjacent->getName(), adjacent->getConnectingFaceUri(),
adjacent->getLinkCost(), ndn::time::milliseconds::max());
}
}
}
}
void
HelloProtocol::processInterest(const ndn::Name& name,
const ndn::Interest& interest)
{
/* interest name: /<neighbor>/NLSR/INFO/<router> */
const ndn::Name interestName = interest.getName();
_LOG_DEBUG("Interest Received for Name: " << interestName);
if (interestName.get(-2).toUri() != INFO_COMPONENT) {
return;
}
ndn::Name neighbor;
neighbor.wireDecode(interestName.get(-1).blockFromValue());
_LOG_DEBUG("Neighbor: " << neighbor);
if (m_nlsr.getAdjacencyList().isNeighbor(neighbor)) {
ndn::shared_ptr<ndn::Data> data = ndn::make_shared<ndn::Data>();
data->setName(ndn::Name(interest.getName()).appendVersion());
data->setFreshnessPeriod(ndn::time::seconds(10)); // 10 sec
data->setContent(reinterpret_cast<const uint8_t*>(INFO_COMPONENT.c_str()),
INFO_COMPONENT.size());
m_nlsr.getKeyChain().sign(*data, m_nlsr.getDefaultCertName());
_LOG_DEBUG("Sending out data for name: " << interest.getName());
m_nlsr.getNlsrFace().put(*data);
Adjacent *adjacent = m_nlsr.getAdjacencyList().findAdjacent(neighbor);
if (adjacent->getStatus() == 0) {
if(adjacent->getFaceId() != 0){
/* interest name: /<neighbor>/NLSR/INFO/<router> */
ndn::Name interestName(neighbor);
interestName.append(NLSR_COMPONENT);
interestName.append(INFO_COMPONENT);
interestName.append(m_nlsr.getConfParameter().getRouterPrefix().wireEncode());
expressInterest(interestName,
m_nlsr.getConfParameter().getInterestResendTime());
}
else {
registerPrefixes(adjacent->getName(), adjacent->getConnectingFaceUri(),
adjacent->getLinkCost(), ndn::time::milliseconds::max());
}
}
}
}
int NdnRtcNamespace::findComponent(const ndn::Name &prefix,
const std::string &componentString)
{
int pos = -1;
int nComponents = prefix.size();
Name::Component searchComponent((const uint8_t*)componentString.c_str(),
componentString.size());
for (int i = nComponents; i--; i >= 0)
{
Name::Component c = prefix.get(i);
if (c == searchComponent)
{
pos = i;
break;
}
}
return pos;
}
void
HelloProtocol::processInterestTimedOut(const ndn::Interest& interest)
{
/* interest name: /<neighbor>/NLSR/INFO/<router> */
const ndn::Name interestName(interest.getName());
_LOG_DEBUG("Interest timed out for Name: " << interestName);
if (interestName.get(-2).toUri() != INFO_COMPONENT) {
return;
}
ndn::Name neighbor = interestName.getPrefix(-3);
_LOG_DEBUG("Neighbor: " << neighbor);
m_nlsr.getAdjacencyList().incrementTimedOutInterestCount(neighbor);
int status = m_nlsr.getAdjacencyList().getStatusOfNeighbor(neighbor);
uint32_t infoIntTimedOutCount =
m_nlsr.getAdjacencyList().getTimedOutInterestCount(neighbor);
_LOG_DEBUG("Status: " << status);
_LOG_DEBUG("Info Interest Timed out: " << infoIntTimedOutCount);
if ((infoIntTimedOutCount < m_nlsr.getConfParameter().getInterestRetryNumber())) {
/* interest name: /<neighbor>/NLSR/INFO/<router> */
ndn::Name interestName(neighbor);
interestName.append(NLSR_COMPONENT);
interestName.append(INFO_COMPONENT);
interestName.append(m_nlsr.getConfParameter().getRouterPrefix().wireEncode());
expressInterest(interestName,
m_nlsr.getConfParameter().getInterestResendTime());
}
else if ((status == 1) &&
(infoIntTimedOutCount == m_nlsr.getConfParameter().getInterestRetryNumber())) {
m_nlsr.getAdjacencyList().setStatusOfNeighbor(neighbor, 0);
m_nlsr.incrementAdjBuildCount();
if (m_nlsr.getIsBuildAdjLsaSheduled() == false) {
_LOG_DEBUG("Scheduling scheduledAdjLsaBuild");
m_nlsr.setIsBuildAdjLsaSheduled(true);
// event here
m_nlsr.getScheduler().scheduleEvent(ndn::time::seconds(5),
ndn::bind(&Lsdb::scheduledAdjLsaBuild,
&m_nlsr.getLsdb()));
}
}
}
SegmentNumber NdnRtcNamespace::getSegmentNumber(const ndn::Name &prefix)
{
PacketNumber segmentNo = -1;
int p = -1;
if (isDeltaFramesPrefix(prefix))
{
p = findComponent(prefix, NameComponentStreamFramesDelta);
}
else if (isKeyFramePrefix(prefix))
{
p = findComponent(prefix, NameComponentStreamFramesKey);
}
if (p > 0 &&
p+3 < prefix.size())
{
Name::Component segmentNoComp = prefix.get(p+3);
segmentNo = NdnRtcUtils::segmentNumber(segmentNoComp);
}
return segmentNo;
}