Trying to be more strict by applying the signature duration constraint at packet...
authorrtrimana <rtrimana@uci.edu>
Fri, 15 Mar 2019 21:40:12 +0000 (14:40 -0700)
committerrtrimana <rtrimana@uci.edu>
Fri, 15 Mar 2019 21:40:12 +0000 (14:40 -0700)
Code/Projects/PacketLevelSignatureExtractor/src/main/java/edu/uci/iotproject/detection/layer2/Layer2ClusterMatcher.java
Code/Projects/PacketLevelSignatureExtractor/src/main/java/edu/uci/iotproject/detection/layer3/Layer3ClusterMatcher.java
Code/Projects/PacketLevelSignatureExtractor/src/main/java/edu/uci/iotproject/detection/layer3/Layer3SignatureDetector.java

index 7fb571a..a3f4d0e 100644 (file)
@@ -63,7 +63,7 @@ public class Layer2ClusterMatcher extends AbstractClusterMatcher implements Laye
      *                   namely when the {@link Layer2FlowReassembler} notifies the {@link Layer2ClusterMatcher} about
      *                   the new flow. This functionality may for example come in handy when one only wants to search
      *                   for matches in the subset of flows that involves a specific (range of) MAC(s).
-     * @param inclusionTimeMillis Packet inclusion limit for matching.
+     * @param inclusionTimeMillis Packet inclusion time limit for matching.
      * @param isRangeBased The boolean that decides if it is range-based vs. strict matching.
      * @param eps The epsilon value used in the DBSCAN algorithm.
      */
index 53fab96..e314deb 100644 (file)
@@ -1,5 +1,6 @@
 package edu.uci.iotproject.detection.layer3;
 
+import edu.uci.iotproject.analysis.TriggerTrafficExtractor;
 import edu.uci.iotproject.detection.AbstractClusterMatcher;
 import edu.uci.iotproject.detection.ClusterMatcherObserver;
 import edu.uci.iotproject.trafficreassembly.layer3.Conversation;
@@ -44,19 +45,26 @@ public class Layer3ClusterMatcher extends AbstractClusterMatcher implements Pack
      */
     private final double mEps;
 
+    /**
+     * The packet inclusion time for signature.
+     */
+    private int mInclusionTimeMillis;
+
     /**
      * Create a {@link Layer3ClusterMatcher}.
      * @param cluster The cluster that traffic is matched against.
      * @param routerWanIp The router's WAN IP if examining traffic captured at the ISP's point of view (used for
      *                    determining the direction of packets).
-     * @param eps The epsilon value used in the DBSCAN algorithm.
+     * @param inclusionTimeMillis The packet inclusion time for signature.
      * @param isRangeBased The boolean that decides if it is range-based vs. strict matching.
+     * @param eps The epsilon value used in the DBSCAN algorithm.
      * @param detectionObservers Client code that wants to get notified whenever the {@link Layer3ClusterMatcher} detects that
      *                          (a subset of) the examined traffic is similar to the traffic that makes up
      *                          {@code cluster}, i.e., when the examined traffic is classified as pertaining to
      *                          {@code cluster}.
      */
-    public Layer3ClusterMatcher(List<List<PcapPacket>> cluster, String routerWanIp, boolean isRangeBased, double eps,
+    public Layer3ClusterMatcher(List<List<PcapPacket>> cluster, String routerWanIp, int inclusionTimeMillis,
+                                boolean isRangeBased, double eps,
                                 ClusterMatcherObserver... detectionObservers) {
         super(cluster, isRangeBased);
         Objects.requireNonNull(detectionObservers, "detectionObservers cannot be null");
@@ -83,6 +91,8 @@ public class Layer3ClusterMatcher extends AbstractClusterMatcher implements Pack
         }
         mEps = eps;
         mRouterWanIp = routerWanIp;
+        mInclusionTimeMillis =
+                inclusionTimeMillis == 0 ? TriggerTrafficExtractor.INCLUSION_WINDOW_MILLIS : inclusionTimeMillis;
     }
 
     @Override
@@ -121,8 +131,13 @@ public class Layer3ClusterMatcher extends AbstractClusterMatcher implements Pack
             while ((match = findSubsequenceInSequence(lowerBound, upperBound, cPkts, mClusterMemberDirections, null)).
                     isPresent()) {
                 List<PcapPacket> matchSeq = match.get();
-                // Notify observers about the match.
-                mObservers.forEach(o -> o.onMatch(Layer3ClusterMatcher.this, matchSeq));
+//                // Notify observers about the match.
+//                mObservers.forEach(o -> o.onMatch(Layer3ClusterMatcher.this, matchSeq));
+                if (!matchSeq.get(matchSeq.size()-1).getTimestamp().isAfter(matchSeq.get(0).getTimestamp().
+                        plusMillis(mInclusionTimeMillis))) {
+                    // Notify observers about the match.
+                    mObservers.forEach(o -> o.onMatch(Layer3ClusterMatcher.this, matchSeq));
+                }
                 /*
                  * Get the index in cPkts of the last packet in the sequence of packets that matches the searched
                  * signature sequence.
@@ -163,8 +178,13 @@ public class Layer3ClusterMatcher extends AbstractClusterMatcher implements Pack
                 while ((match = findSubsequenceInSequence(signatureSequence, cPkts, mClusterMemberDirections, null)).
                         isPresent()) {
                     List<PcapPacket> matchSeq = match.get();
-                    // Notify observers about the match.
-                    mObservers.forEach(o -> o.onMatch(Layer3ClusterMatcher.this, matchSeq));
+//                    // Notify observers about the match.
+//                    mObservers.forEach(o -> o.onMatch(Layer3ClusterMatcher.this, matchSeq));
+                    if (!matchSeq.get(matchSeq.size()-1).getTimestamp().isAfter(matchSeq.get(0).getTimestamp().
+                           plusMillis(mInclusionTimeMillis))) {
+                        // Notify observers about the match.
+                        mObservers.forEach(o -> o.onMatch(Layer3ClusterMatcher.this, matchSeq));
+                    }
                     /*
                      * Get the index in cPkts of the last packet in the sequence of packets that matches the searched
                      * signature sequence.
index 3c6d331..b11fef8 100644 (file)
@@ -248,7 +248,8 @@ public class Layer3SignatureDetector implements PacketListener, ClusterMatcherOb
         // Generate corresponding/appropriate ClusterMatchers based on the provided signature
         List<Layer3ClusterMatcher> clusterMatchers = new ArrayList<>();
         for (List<List<PcapPacket>> cluster : mSignature) {
-            clusterMatchers.add(new Layer3ClusterMatcher(cluster, routerWanIp, isRangeBased, eps, this));
+            clusterMatchers.add(new Layer3ClusterMatcher(cluster, routerWanIp, inclusionTimeMillis,
+                    isRangeBased, eps, this));
         }
         mClusterMatchers = Collections.unmodifiableList(clusterMatchers);