Target gNB-DU sends the ue_context_setup_response to the gNB-CU with the new C-RNTI

openair2/F1AP/f1ap_cu_ue_context_management.c

@@ -616,6 +616,12 @@ int CU_handle_UE_CONTEXT_SETUP_RESPONSE(instance_t instance, sctp_assoc_t assoc_
                              F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID, true);
   f1ap_ue_context_setup_resp->gNB_DU_ue_id = ie->value.choice.GNB_DU_UE_F1AP_ID;
   LOG_D(F1AP, "f1ap_ue_context_setup_resp->gNB_DU_ue_id is: %d \n", f1ap_ue_context_setup_resp->gNB_DU_ue_id);
+  F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextSetupResponseIEs_t, ie, container, F1AP_ProtocolIE_ID_id_C_RNTI, false);
+  if (ie) {
+    f1ap_ue_context_setup_resp->crnti = calloc(1, sizeof(uint16_t));
+    *f1ap_ue_context_setup_resp->crnti = ie->value.choice.C_RNTI;
+  }
+
   // DUtoCURRCInformation
   F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextSetupResponseIEs_t, ie, container,
                              F1AP_ProtocolIE_ID_id_DUtoCURRCInformation, true);

openair2/F1AP/f1ap_du_ue_context_management.c

@@ -370,15 +370,12 @@ int DU_send_UE_CONTEXT_SETUP_RESPONSE(sctp_assoc_t assoc_id, f1ap_ue_context_set
 
   /* optional */
   /* c4. C_RNTI */
-  if (0) {
+  if (resp->crnti!=NULL) {
     asn1cSequenceAdd(out->protocolIEs.list, F1AP_UEContextSetupResponseIEs_t, ie4);
     ie4->id                             = F1AP_ProtocolIE_ID_id_C_RNTI;
     ie4->criticality                    = F1AP_Criticality_ignore;
     ie4->value.present                  = F1AP_UEContextSetupResponseIEs__value_PR_C_RNTI;
-    //C_RNTI_TO_BIT_STRING(rntiP, &ie->value.choice.C_RNTI);
-    ie4->value.choice.C_RNTI=0;
-    AssertFatal(false, "not implemented\n");
-    LOG_E(F1AP,"RNTI to code!\n");
+    ie4->value.choice.C_RNTI            = *resp->crnti;
   }
 
   /* optional */

openair2/LAYER2/NR_MAC_gNB/mac_rrc_ul_f1ap.c

@@ -161,6 +161,10 @@ static void ue_context_setup_response_f1ap(const f1ap_ue_context_setup_t *req, c
     for (int i = 0; i < f1ap_msg->drbs_to_be_setup_length; ++i)
       f1ap_msg->drbs_to_be_setup[i] = resp->drbs_to_be_setup[i];
   }
+  if (resp->crnti) {
+    f1ap_msg->crnti = calloc(1, sizeof(uint16_t));
+    *f1ap_msg->crnti = *resp->crnti;
+  }
 
   f1ap_msg->du_to_cu_rrc_information = malloc(sizeof(*resp->du_to_cu_rrc_information));
   AssertFatal(f1ap_msg->du_to_cu_rrc_information != NULL, "out of memory\n");