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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 m3ap_eNB_handler.c
* \brief m3ap handler procedures for eNB
* \author Javier Morgade <javier.morgade@ieee.org>
* \date 2019
* \version 0.1
*/
#include <stdint.h>
#include "intertask_interface.h"
#include "asn1_conversions.h"
#include "m3ap_common.h"
#include "m3ap_MME_defs.h"
#include "m3ap_handler.h"
#include "m3ap_decoder.h"
#include "m3ap_ids.h"
#include "m3ap_MME_management_procedures.h"
//#include "m3ap_MCE_generate_messages.h"
#include "m3ap_MME_interface_management.h"
#include "msc.h"
#include "assertions.h"
#include "conversions.h"
/* Handlers matrix. Only eNB related procedure present here */
m3ap_MCE_message_decoded_callback m3ap_MME_messages_callback[][3] = {
{ 0, MME_handle_MBMS_SESSION_START_RESPONSE, 0 }, /* MBMSSessionStart */
{ 0, MME_handle_MBMS_SESSION_STOP_RESPONSE, 0 }, /* MBMSSessionStop */
{ 0, 0, 0 }, /* Error Indication */
{ 0, 0, 0 }, /* Reset */
{ 0, 0, 0 }, /* ??? */
{ 0, MME_handle_MBMS_SESSION_UPDATE_RESPONSE, 0 }, /* MBMSSessionUpdate */
{ 0, 0, 0 }, /* MCEConfigurationUpdate */
{ MME_handle_M3_SETUP_REQUEST, 0, 0 } /* M3 Setup */
};
static char *m3ap_direction2String(int m3ap_dir) {
static char *m3ap_direction_String[] = {
"", /* Nothing */
"Originating message", /* originating message */
"Successfull outcome", /* successfull outcome */
"UnSuccessfull outcome", /* successfull outcome */
};
return(m3ap_direction_String[m3ap_dir]);
}
int m3ap_MME_handle_message(instance_t instance, uint32_t assoc_id, int32_t stream,
const uint8_t * const data, const uint32_t data_length)
{
M3AP_M3AP_PDU_t pdu;
int ret;
DevAssert(data != NULL);
memset(&pdu, 0, sizeof(pdu));
if (m3ap_decode_pdu(&pdu, data, data_length) < 0) {
LOG_E(M3AP, "Failed to decode PDU\n");
return -1;
}
/* Checking procedure Code and direction of message */
if (pdu.choice.initiatingMessage.procedureCode > sizeof(m3ap_MME_messages_callback) / (3 * sizeof(
m3ap_message_decoded_callback))
|| (pdu.present > M3AP_M3AP_PDU_PR_unsuccessfulOutcome)) {
LOG_E(M3AP, "[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_M3AP_M3AP_PDU, &pdu);
return -1;
}
/* No handler present.
* This can mean not implemented or no procedure for eNB (wrong direction).
*/
if (m3ap_MME_messages_callback[pdu.choice.initiatingMessage.procedureCode][pdu.present - 1] == NULL) {
LOG_E(M3AP, "[SCTP %d] No handler for procedureCode %ld in %s\n",
assoc_id, pdu.choice.initiatingMessage.procedureCode,
m3ap_direction2String(pdu.present - 1));
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_M3AP_M3AP_PDU, &pdu);
return -1;
}
/* Calling the right handler */
LOG_I(M3AP, "Calling handler with instance %d\n",instance);
ret = (*m3ap_MME_messages_callback[pdu.choice.initiatingMessage.procedureCode][pdu.present - 1])
(instance, assoc_id, stream, &pdu);
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_M3AP_M3AP_PDU, &pdu);
return ret;
}