/**
* Returns a collection of DomainTCPSessions objects from the collection TCPSession objects found
* in the trace.
*
* @param sessions The collection TCPSession objects found in the trace.
* @return The collection of domain tcp sessions.
*/
public static Collection<DomainTCPSessions> extractDomainTCPSessions(
Collection<TCPSession> sessions) {
if (sessions == null || sessions.size() <= 0) {
return Collections.emptyList();
}
// Aggregate TCP sessions by domain
Map<String, ArrayList<TCPSession>> distinctMap = new HashMap<String, ArrayList<TCPSession>>();
for (TCPSession tcpSession : sessions) {
if (null != tcpSession) {
String domainName = tcpSession.getDomainName();
ArrayList<TCPSession> tempList = distinctMap.get(domainName);
if (tempList == null) {
tempList = new ArrayList<TCPSession>();
distinctMap.put(domainName, tempList);
}
tempList.add(tcpSession);
}
}
// Formulate result list
List<DomainTCPSessions> result = new ArrayList<DomainTCPSessions>(distinctMap.size());
for (Map.Entry<String, ArrayList<TCPSession>> entry : distinctMap.entrySet()) {
ArrayList<TCPSession> tempList = entry.getValue();
tempList.trimToSize();
result.add(new DomainTCPSessions(entry.getKey(), tempList));
}
return result;
}
/**
* A factory method that returns a Collection of DomainTCPSessions objects extracted from a
* collection of TCPSession objects.
*
* @param sessions A Collection of TCPSession objects from which to extract the data.
* @return A Collection of DomainTCPSessions objects.
*/
private DomainTCPSessions(String domainName, Collection<TCPSession> sessions) {
this.domainName = domainName;
this.sessions = Collections.unmodifiableCollection(sessions);
double sessionLength = 0;
for (TCPSession session : sessions) {
sessionLength += session.getSessionEndTime() - session.getSessionStartTime();
numFiles += session.getFileDownloadCount();
}
int size = sessions.size();
this.avgSessionLength = (double) sessionLength / size;
}
/** Burst data's analyzed to categorize the periodic bursts. */
private void diagnosisPeriodicRequest() {
Map<String, List<Double>> requestHost2tsList = new HashMap<String, List<Double>>();
Map<String, List<Double>> requestObj2tsList = new HashMap<String, List<Double>>();
Map<InetAddress, List<Double>> connIP2tsList = new HashMap<InetAddress, List<Double>>();
Set<String> hostPeriodicInfoSet = new HashSet<String>();
periodicCount = 0;
diffPeriodicCount = 0;
minimumPeriodicRepeatTime = 0.0;
for (TCPSession b : analysis.getTcpSessions()) {
// Get a list of timestamps of established sessions with each remote
// IP
PacketInfo p = b.getPackets().get(0);
if (p.getTcpInfo() == TcpInfo.TCP_ESTABLISH) {
List<Double> res = connIP2tsList.get(b.getRemoteIP());
if (res == null) {
res = new ArrayList<Double>();
connIP2tsList.put(b.getRemoteIP(), res);
}
res.add(Double.valueOf(p.getTimeStamp()));
}
// Get a list of timestamps of HTTP requests to hosts/object names
for (HttpRequestResponseInfo rr : b.getRequestResponseInfo()) {
PacketInfo pkt = rr.getFirstDataPacket();
if (rr.getDirection() == HttpRequestResponseInfo.Direction.REQUEST) {
Double ts0 = Double.valueOf(pkt.getTimeStamp());
if (rr.getHostName() != null) {
List<Double> tempRequestHostEventList = requestHost2tsList.get(rr.getHostName());
if (tempRequestHostEventList == null) {
tempRequestHostEventList = new ArrayList<Double>();
requestHost2tsList.put(rr.getHostName(), tempRequestHostEventList);
}
tempRequestHostEventList.add(ts0);
}
if (rr.getObjName() != null) {
String objName = rr.getObjNameWithoutParams();
List<Double> tempRequestObjEventList = requestObj2tsList.get(objName);
if (tempRequestObjEventList == null) {
tempRequestObjEventList = new ArrayList<Double>();
requestObj2tsList.put(objName, tempRequestObjEventList);
}
tempRequestObjEventList.add(ts0);
}
}
}
}
Set<String> hostList = new HashSet<String>();
for (Map.Entry<String, List<Double>> iter : requestHost2tsList.entrySet()) {
if (SelfCorr(iter.getValue())) {
hostList.add(iter.getKey());
}
}
Set<String> objList = new HashSet<String>();
for (Map.Entry<String, List<Double>> iter : requestObj2tsList.entrySet()) {
if (SelfCorr(iter.getValue())) {
objList.add(iter.getKey());
}
}
Set<InetAddress> ipList = new HashSet<InetAddress>();
for (Map.Entry<InetAddress, List<Double>> iter : connIP2tsList.entrySet()) {
if (SelfCorr(iter.getValue())) {
ipList.add(iter.getKey());
}
}
for (Burst burst : burstCollection) {
if (!burst.getBurstInfos().contains(BurstInfo.BURST_CLIENT_DELAY)) {
continue;
}
Packet beginPacket = burst.getBeginPacket().getPacket();
if (beginPacket instanceof IPPacket) {
IPPacket ip = (IPPacket) beginPacket;
if (ipList.contains(ip.getDestinationIPAddress())
|| ipList.contains(ip.getSourceIPAddress())) {
periodicCount++;
burst.setBurstInfo(BurstInfo.BURST_PERIODICAL);
if (ipList.contains(ip.getDestinationIPAddress())) {
hostPeriodicInfoSet.add(ip.getDestinationIPAddress().toString());
} else {
hostPeriodicInfoSet.add(ip.getSourceIPAddress().toString());
}
continue;
}
}
PacketInfo firstUplinkPayloadPacket = null;
for (PacketInfo p : burst.getPackets()) {
if (p.getDir() == Direction.UPLINK && p.getPayloadLen() > 0) {
firstUplinkPayloadPacket = p;
break;
}
}
for (TCPSession session : analysis.getTcpSessions()) {
for (HttpRequestResponseInfo rr : session.getRequestResponseInfo()) {
if (rr.getDirection() == HttpRequestResponseInfo.Direction.REQUEST
&& (hostList.contains(rr.getHostName())
|| objList.contains(rr.getObjNameWithoutParams()))) {
if (rr.getFirstDataPacket() == firstUplinkPayloadPacket) {
periodicCount++;
burst.setBurstInfo(BurstInfo.BURST_PERIODICAL);
burst.setFirstUplinkDataPacket(firstUplinkPayloadPacket);
if (hostList.contains(rr.getHostName())) {
hostPeriodicInfoSet.add(rr.getHostName());
} else {
hostPeriodicInfoSet.add(rr.getObjNameWithoutParams());
}
continue;
}
}
}
}
}
diffPeriodicCount = hostPeriodicInfoSet.size();
}
