diff --git a/tools/cooja/java/se/sics/cooja/util/ArrayUtils.java b/tools/cooja/java/se/sics/cooja/util/ArrayUtils.java
index 05f610579..a54d93fd1 100644
--- a/tools/cooja/java/se/sics/cooja/util/ArrayUtils.java
+++ b/tools/cooja/java/se/sics/cooja/util/ArrayUtils.java
@@ -24,7 +24,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- * $Id: ArrayUtils.java,v 1.2 2009/10/27 09:52:24 fros4943 Exp $
+ * $Id: ArrayUtils.java,v 1.3 2009/10/29 16:48:50 fros4943 Exp $
  */
 
 package se.sics.cooja.util;
@@ -35,6 +35,9 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.ByteBuffer;
 
 import javax.swing.JFileChooser;
 
@@ -131,4 +134,20 @@ public class ArrayUtils {
     }
   }
 
+  public static byte[] readFromStream(InputStream input) {
+    try {
+      int numRead = 0;
+      int offset = 0;
+      byte data[] = new byte[input.available()*2];
+      DataInputStream dataIn = new DataInputStream(input);
+      while ((numRead = dataIn.read(data, offset, data.length-offset)) >= 0) {
+        offset += numRead;
+      }
+      byte[] streamData = new byte[offset];
+      System.arraycopy(data, 0, streamData, 0, offset);
+      return streamData;
+    } catch (Exception ex) {
+      return null;
+    }
+  }
 }