Fixed bug when having UnknownTcpOption with zero data, avoid extracti…

…ng sub array from the raw data. If the length is equal to 2 then it means there is no data, an empty data array will be created.
kaitoy · Aug 2, 2018 · 3ba83e4 · 3ba83e4
1 parent 3846607
commit 3ba83e4
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/pcap4j-core/src/main/java/org/pcap4j/packet/UnknownTcpOption.java b/pcap4j-core/src/main/java/org/pcap4j/packet/UnknownTcpOption.java
@@ -74,7 +74,10 @@ private UnknownTcpOption(
       throw new IllegalRawDataException(sb.toString());
     }
 
-    this.data = ByteArrays.getSubArray(rawData, 2 + offset, this.length - 2);
+    if (this.length > 2)
+      this.data = ByteArrays.getSubArray(rawData, 2 + offset, this.length - 2);
+    else
+      this.data = new byte[]{};
   }
 
   private UnknownTcpOption(Builder builder) {