Indicate to NAS that the RRC connection has been established with a Connection Establishment Indication

* ITTI from RRC to NAS
* according to 5.3.1.3 of 3GPP TS 24.501
* set 5GMM mode to CONNECTED

openair2/RRC/NR_UE/rrc_UE.c

@@ -1182,6 +1182,10 @@ static void nr_rrc_process_rrcsetup(NR_UE_RRC_INST_t *rrc,
   // enter RRC_CONNECTED
   rrc->nrRrcState = RRC_STATE_CONNECTED_NR;
 
+  // Indicate to NAS that the RRC connection has been established (5.3.1.3 of 3GPP TS 24.501)
+  MessageDef *msg_p = itti_alloc_new_message(TASK_RRC_NRUE, 0, NR_NAS_CONN_ESTABLISH_IND);
+  itti_send_msg_to_task(TASK_NAS_NRUE, rrc->ue_id, msg_p);
+
   // set the content of RRCSetupComplete message
   // TODO procedues described in 5.3.3.4 seems more complex than what we actualy do
   rrc_ue_generate_RRCSetupComplete(rrc, rrcSetup->rrc_TransactionIdentifier);