int MediaThread::lookupPrefixInPit(const ndn::Name &prefix,
SegmentData::SegmentMetaInfo &metaInfo)
{
lock_guard<mutex> scopedLock(pitMutex_);
std::map<Name, PitEntry>::iterator pitHit = pit_.find(prefix);
// check for rightmost prefixes
if (pitHit == pit_.end())
{
ndn::Name testPrefix(prefix);
NdnRtcNamespace::trimPacketNumber(prefix, testPrefix);
pitHit = pit_.find(testPrefix);
}
if (pitHit != pit_.end())
{
int64_t currentTime = NdnRtcUtils::millisecondTimestamp();
shared_ptr<const Interest> pendingInterest = pitHit->second.interest_;
metaInfo.interestNonce_ =
NdnRtcUtils::blobToNonce(pendingInterest->getNonce());
metaInfo.interestArrivalMs_ = pitHit->second.arrivalTimestamp_;
metaInfo.generationDelayMs_ = (uint32_t)(currentTime - pitHit->second.arrivalTimestamp_);
pit_.erase(pitHit);
LogTraceC
<< "pit hit [" << prefix.toUri() << "] -> ["
<< pendingInterest->getName().toUri() << " (size "
<< pit_.size() << ")]" << std::endl;
return 1;
}
else
{
LogTraceC << "no pit entry " << prefix.toUri() << std::endl;
}
return 0;
}
bool NdnRtcNamespace::isDeltaFramesPrefix(const ndn::Name &prefix)
{
std::string prefixString = prefix.toUri();
int n1 = prefixString.find(NameComponentUserStreams);
int n2 = prefixString.find(NameComponentStreamFrames);
int n3 = prefixString.find(NameComponentStreamFramesDelta);
return !(n1 == n2 == n3) &&
n1 >= 0 && n1 < n2 && n2 < n3;
}
bool NdnRtcNamespace::hasComponent(const ndn::Name &prefix,
const std::string &componentString,
bool isClosed)
{
string prefixStr = prefix.toUri();
string searchStr(componentString);
if (searchStr[0] != '/')
searchStr.insert(0, "/");
if (isClosed &&
searchStr[searchStr.size()-1] != '/')
searchStr.append("/");
return prefixStr.find(searchStr) != std::string::npos;
}
void
runScripts(ndn::Name& interestName)
{
std::string result, tmpString;
std::string prefix = "./";
FILE* pipe;
const char* cmd;
char buf[BUF_SIZE];
while (!m_scriptsList.empty())
{
tmpString = prefix + m_scriptsList.front() + ' ' + interestName.toUri();
cmd = tmpString.c_str();
if(DEBUG) std::cout << "running " << cmd << std::endl;
pipe = popen(cmd, "r");
if (!pipe)
std::cerr << "Unable to run " << cmd << " - is the script in the nfdDataCollection directory?" << std::endl;
result = "";
while(!feof(pipe))
{
if(fgets(buf, BUF_SIZE, pipe) != NULL)
result += buf;
}
pclose(pipe);
m_scriptsList.pop_front();
if(DEBUG) std::cout << "Got data: " << result << std::endl;
// generate data packet containing script data
ScriptReply script_reply;
script_reply.setData(result);
ndn::shared_ptr<ndn::Data> data = ndn::make_shared<ndn::Data>(interestName);
data->setContent(script_reply.wireEncode());
data->setFreshnessPeriod(time::seconds(0));
m_keyChain.sign(*data);
m_face.put(*data);
}
}
bool NdnRtcNamespace::trimmedLookupPrefix(const ndn::Name &prefix,
ndn::Name &trimmedPrefix)
{
trimmedPrefix = prefix;
bool res = false;
std::string prefixString = prefix.toUri();
int n1 = prefixString.find(NameComponentUserStreams);
int n2 = prefixString.find(NameComponentStreamFrames);
int n3 = prefixString.find(NameComponentStreamFramesKey);
int n4 = prefixString.find(NameComponentStreamFramesDelta);
if (!(n1 == n2 == n3 == n4) &&
n1 >= 0 && n1 < n2 &&
(n2 < n3 || n2 < n4))
{
int p1 = prefixString.find(NameComponentFrameSegmentData);
int p2 = prefixString.find(NameComponentFrameSegmentParity);
if (!(p1 == p2))
{
int p = -1;
if (p1 == std::string::npos)
p = findComponent(prefix, NameComponentFrameSegmentParity);
else
p = findComponent(prefix, NameComponentFrameSegmentData);
trimmedPrefix = prefix.getSubName(0, p);
}
res = true;
}
return res;
}