Adding isTruncated field to the IPv4. It is set to true of the totalLength...

Adding isTruncated field to the IPv4. It is set to true of the totalLength doesn't match the byte[] length during deserialization.

src/main/java/net/floodlightcontroller/packet/IPv4.java

@@ -57,12 +57,15 @@ public class IPv4 extends BasePacket {
     protected int destinationAddress;
     protected byte[] options;
 
+    protected boolean isTruncated;
+
     /**
      * Default constructor that sets the version to 4.
      */
     public IPv4() {
         super();
         this.version = 4;
+        isTruncated = false;
     }
 
     /**
@@ -116,6 +119,14 @@ public class IPv4 extends BasePacket {
         return identification;
     }
 
+    public boolean isTruncated() {
+        return isTruncated;
+    }
+
+    public void setTruncated(boolean isTruncated) {
+        this.isTruncated = isTruncated;
+    }
+
     /**
      * @param identification the identification to set
      */
@@ -357,6 +368,9 @@ public class IPv4 extends BasePacket {
         }
         this.payload = payload.deserialize(data, bb.position(), bb.limit()-bb.position());
         this.payload.setParent(this);
+
+        if (this.totalLength != length) this.isTruncated = true;
+
         return this;
     }