** new procedure - refresh kENB from NAS -> AS **

added flow to refresh KeNB key in RRC on receiving S1AP-InitialContextSetup
added flow to configure PDCP security mode
enabled filling in the PDCP MAC code during and after RRC-SMC procedure

(cherry picked from commit 898cd5c45aedb27625d73352568211b4467c8dd9)

openair3/NAS/UE/EMM/SecurityModeControl.c

@@ -72,6 +72,8 @@ Description Defines the security mode control EMM procedure executed by the
 #include "secu_defs.h"
 #include "msc.h"
 
+#include "nas_itti_messaging.h"
+
 /****************************************************************************/
 /****************  E X T E R N A L    D E F I N I T I O N S  ****************/
 /****************************************************************************/
@@ -293,7 +295,9 @@ int emm_proc_security_mode_command(int native_ksi, int ksi,
 
       _emm_data.security->selected_algorithms.encryption = seea;
       _emm_data.security->selected_algorithms.integrity  = seia;
-
+#if 1 // wilson 2016-05-02 add new message to update kenb in RRC after NAS SMC complete
+      nas_itti_kenb_refresh_req(_security_data.kenb.value);
+#endif
     }
     /*
      * NAS security mode command not accepted by the UE