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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file f1ap_handlers.c
* \brief f1ap messages handlers
* \author EURECOM/NTUST
* \date 2018
* \version 0.1
* \company Eurecom
* \email: navid.nikaein@eurecom.fr, bing-kai.hong@eurecom.fr
* \note
* \warning
*/
#include "f1ap_common.h"
#include "f1ap_handlers.h"
#include "f1ap_decoder.h"
#include "f1ap_cu_interface_management.h"
#include "f1ap_du_interface_management.h"
#include "f1ap_cu_rrc_message_transfer.h"
#include "f1ap_du_rrc_message_transfer.h"
extern f1ap_setup_req_t *f1ap_du_data_from_du;
/* Handlers matrix. Only f1 related procedure present here */
f1ap_message_decoded_callback f1ap_messages_callback[][3] = {
{ 0, 0, 0 }, /* Reset */
{ CU_handle_F1_SETUP_REQUEST, DU_handle_F1_SETUP_RESPONSE, DU_handle_F1_SETUP_FAILURE }, /* F1Setup */
{ 0, 0, 0 }, /* ErrorIndication */
{ 0, 0, 0 }, /* gNBDUConfigurationUpdate */
{ 0, 0, 0 }, /* gNBCUConfigurationUpdate */
{ 0, 0, 0 }, /* UEContextSetup */
{ 0, 0, 0 }, /* UEContextRelease */
{ 0, 0, 0 }, /* UEContextModification */
{ 0, 0, 0 }, /* UEContextModificationRequired */
{ 0, 0, 0 }, /* UEMobilityCommand */
{ 0, 0, 0 }, /* UEContextReleaseRequest */
{ CU_handle_INITIAL_UL_RRC_MESSAGE_TRANSFER, 0, 0 }, /* InitialULRRCMessageTransfer */
{ DU_handle_DL_RRC_MESSAGE_TRANSFER, 0, 0 }, /* DLRRCMessageTransfer */
{ CU_handle_UL_RRC_MESSAGE_TRANSFER, 0, 0 }, /* ULRRCMessageTransfer */
{ 0, 0, 0 }, /* privateMessage */
{ 0, 0, 0 }, /* UEInactivityNotification */
{ 0, 0, 0 }, /* GNBDUResourceCoordination */
{ 0, 0, 0 }, /* SystemInformationDeliveryCommand */
{ 0, 0, 0 }, /* Paging */
{ 0, 0, 0 }, /* Notify */
{ 0, 0, 0 }, /* WriteReplaceWarning */
{ 0, 0, 0 }, /* PWSCancel */
{ 0, 0, 0 }, /* PWSRestartIndication */
{ 0, 0, 0 }, /* PWSFailureIndication */
};
const char *f1ap_direction2String(int f1ap_dir) {
static const char *f1ap_direction_String[] = {
"", /* Nothing */
"Initiating message", /* initiating message */
"Successfull outcome", /* successfull outcome */
"UnSuccessfull outcome", /* successfull outcome */
};
return(f1ap_direction_String[f1ap_dir]);
}
int f1ap_handle_message(instance_t instance, uint32_t assoc_id, int32_t stream,
const uint8_t * const data, const uint32_t data_length)
{
F1AP_F1AP_PDU_t pdu;
int ret;
DevAssert(data != NULL);
memset(&pdu, 0, sizeof(pdu));
if (f1ap_decode_pdu(&pdu, data, data_length) < 0) {
LOG_E(F1AP, "Failed to decode PDU\n");
return -1;
}
/* Checking procedure Code and direction of message */
if (pdu.choice.initiatingMessage->procedureCode > sizeof(f1ap_messages_callback) / (3 * sizeof(
f1ap_message_decoded_callback))
|| (pdu.present > F1AP_F1AP_PDU_PR_unsuccessfulOutcome)) {
LOG_E(F1AP, "[SCTP %d] Either procedureCode %ld or direction %d exceed expected\n",
assoc_id, pdu.choice.initiatingMessage->procedureCode, pdu.present);
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_F1AP_F1AP_PDU, &pdu);
return -1;
}
/* No handler present.
* This can mean not implemented or no procedure for eNB (wrong direction).
*/
if (f1ap_messages_callback[pdu.choice.initiatingMessage->procedureCode][pdu.present - 1] == NULL) {
LOG_E(F1AP, "[SCTP %d] No handler for procedureCode %ld in %s\n",
assoc_id, pdu.choice.initiatingMessage->procedureCode,
f1ap_direction2String(pdu.present - 1));
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_F1AP_F1AP_PDU, &pdu);
return -1;
}
/* Calling the right handler */
LOG_I(DU_F1AP, "Calling handler with instance %d\n",instance);
ret = (*f1ap_messages_callback[pdu.choice.initiatingMessage->procedureCode][pdu.present - 1])
(instance, assoc_id, stream, &pdu);
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_F1AP_F1AP_PDU, &pdu);
return ret;
}