** 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/COMMON/API/NETWORK/l2_message.h

@@ -116,6 +116,15 @@ Description Defines the messages supported by the Access Stratum sublayer
 #define AS_HSDUPA     (1 << NET_ACCESS_HSDUPA)
 #define AS_EUTRAN     (1 << NET_ACCESS_EUTRAN)
 
+/*
+ * NAS->AS -K_eNB refresh request
+ * NAS request AS to refresh its KeNB key
+ */
+typedef struct kenb_refresh_req_s {
+  Byte_t kenb[32];
+} kenb_refresh_req_t;
+
+#if 1 // wilson 2016-05-02 add new message to update kenb in RRC after NAS SMC complete
 /*
  * NAS->AS - Cell Information request
  * NAS request AS to search for a suitable cell belonging to the selected
@@ -125,6 +134,7 @@ typedef struct {
   plmn_t plmnID;  /* PLMN identifier         */
   Byte_t rat;   /* Bitmap - set of radio access technologies   */
 } cell_info_req_t;
+#endif
 
 /*
  * AS->NAS - Cell Information response