--- a/src/devices/wifi/qos-utils.cc	Wed Feb 03 20:34:50 2010 +0100
+++ b/src/devices/wifi/qos-utils.cc	Wed Feb 03 20:34:51 2010 +0100
@@ -16,6 +16,7 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  *
  * Author: Mirko Banchi <mk.banchi@gmail.com>
+ * Author: Cecchi Niccolò <insa@igeek.it>
  */
 #include "qos-utils.h"
 #include "qos-tag.h"
@@ -69,4 +70,16 @@
   return tid;
 }
 
+uint32_t
+QosUtilsMapSeqControlToUniqueInteger (uint16_t seqControl, uint16_t endSequence)
+{
+  uint32_t integer = 0;
+  uint16_t numberSeq = (seqControl>>4) & 0x0fff;
+  integer = (4096 - (endSequence + 1) + numberSeq) % 4096;
+  integer *= 16;
+  integer += (seqControl & 0x000f);
+  return integer; 
+}
+
+
 } //namespace ns3