120 lines
4.2 KiB
C
120 lines
4.2 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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/*! \file m3ap_MME_handler.c
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* \brief m3ap handler procedures for eNB
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* \author Javier Morgade <javier.morgade@ieee.org>
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* \date 2019
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* \version 0.1
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*/
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#include <stdint.h>
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#include "intertask_interface.h"
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#include "oai_asn1.h"
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#include "m3ap_common.h"
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#include "m3ap_MME_defs.h"
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#include "m3ap_handler.h"
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#include "m3ap_decoder.h"
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#include "m3ap_ids.h"
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#include "m3ap_MME_management_procedures.h"
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//#include "m3ap_MCE_generate_messages.h"
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#include "m3ap_MME_interface_management.h"
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#include "assertions.h"
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#include "conversions.h"
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/* Handlers matrix. Only eNB related procedure present here */
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static const m3ap_MCE_message_decoded_callback m3ap_MME_messages_callback[][3] = {
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{0, MME_handle_MBMS_SESSION_START_RESPONSE, 0}, /* MBMSSessionStart */
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{0, MME_handle_MBMS_SESSION_STOP_RESPONSE, 0}, /* MBMSSessionStop */
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{0, 0, 0}, /* Error Indication */
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{0, 0, 0}, /* Reset */
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{0, 0, 0}, /* ??? */
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{0, MME_handle_MBMS_SESSION_UPDATE_RESPONSE, 0}, /* MBMSSessionUpdate */
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{0, 0, 0}, /* MCEConfigurationUpdate */
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{MME_handle_M3_SETUP_REQUEST, 0, 0} /* M3 Setup */
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};
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static char *m3ap_direction2String(int m3ap_dir) {
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static char *m3ap_direction_String[] = {
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"", /* Nothing */
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"Originating message", /* originating message */
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"Successfull outcome", /* successfull outcome */
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"UnSuccessfull outcome", /* successfull outcome */
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};
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return(m3ap_direction_String[m3ap_dir]);
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}
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int m3ap_MME_handle_message(instance_t instance,
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sctp_assoc_t assoc_id,
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int32_t stream,
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const uint8_t *const data,
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const uint32_t data_length)
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{
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M3AP_M3AP_PDU_t pdu;
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int ret;
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DevAssert(data != NULL);
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memset(&pdu, 0, sizeof(pdu));
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if (m3ap_decode_pdu(&pdu, data, data_length) < 0) {
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LOG_E(M3AP, "Failed to decode PDU\n");
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return -1;
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}
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/* Checking procedure Code and direction of message */
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if (pdu.choice.initiatingMessage.procedureCode > sizeof(m3ap_MME_messages_callback) / (3 * sizeof(
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m3ap_message_decoded_callback))
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|| (pdu.present > M3AP_M3AP_PDU_PR_unsuccessfulOutcome)) {
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LOG_E(M3AP, "[SCTP %d] Either procedureCode %ld or direction %d exceed expected\n",
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assoc_id, pdu.choice.initiatingMessage.procedureCode, pdu.present);
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ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_M3AP_M3AP_PDU, &pdu);
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return -1;
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}
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/* No handler present.
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* This can mean not implemented or no procedure for eNB (wrong direction).
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*/
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if (m3ap_MME_messages_callback[pdu.choice.initiatingMessage.procedureCode][pdu.present - 1] == NULL) {
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LOG_E(M3AP, "[SCTP %d] No handler for procedureCode %ld in %s\n",
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assoc_id, pdu.choice.initiatingMessage.procedureCode,
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m3ap_direction2String(pdu.present - 1));
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ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_M3AP_M3AP_PDU, &pdu);
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return -1;
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}
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/* Calling the right handler */
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LOG_I(M3AP, "Calling handler with instance %ld\n",instance);
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ret = (*m3ap_MME_messages_callback[pdu.choice.initiatingMessage.procedureCode][pdu.present - 1])
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(instance, assoc_id, stream, &pdu);
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ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_M3AP_M3AP_PDU, &pdu);
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return ret;
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}
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