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openairinterface5g/openair3/M3AP/m3ap_eNB_handler.c
T
Javier Morgade 365527d401 M3AP 3GPP TS 36.444 interface implemented: 
1.MME entity developed to handle M3 side (new dedicated task developed: TASK_MME_APP) (these procedures should be moved to OPENAIR-CN ... just implemented to easy the E-UTRAN MBMS stuff development)
        2.MCE side M3 interface procedures (new dedicated task developed: TASK_M3AP_MCE)
        3.MME side M3 interface procedures (new dedicated task developed: TASK_M2AP_MME) (these procedures should be moved to OPENAIR-CN ... just implemented to easy the E-UTRAN MBMS stuff development)
        4.ASN1 bindings for m3ap-14.0.0.asn1 implemented and tested
        5.MME config parameters

	ACKNOWLEDGEMENT:
 	1. This commit was developed at Vicomtech (https://www.vicomtech.org) under UE project CDN-X-ALL: "CDN edge-cloud computing for efficient cache and reliable streaming aCROSS Aggregated unicast-multicast LinkS"
 	2. Project funded by Fed4FIRE+ OC5 (https://www.fed4fire.eu)

	Signed-off-by: Javier Morgade <javier.morgade@ieee.org>
2019-09-14 13:53:39 +02:00

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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_eNB_defs.h"
#include "m3ap_eNB_handler.h"
#include "m3ap_eNB_decoder.h"
#include "m3ap_ids.h"
#include "m3ap_eNB_management_procedures.h"
#include "m3ap_eNB_generate_messages.h"
#include "msc.h"
#include "assertions.h"
#include "conversions.h"
static
int m3ap_eNB_handle_m3_setup_request (instance_t instance,
uint32_t assoc_id,
uint32_t stream,
M3AP_M3AP_PDU_t *pdu);
static
int m3ap_eNB_handle_m3_setup_response (instance_t instance,
uint32_t assoc_id,
uint32_t stream,
M3AP_M3AP_PDU_t *pdu);
static
int m3ap_eNB_handle_m3_setup_failure (instance_t instance,
uint32_t assoc_id,
uint32_t stream,
M3AP_M3AP_PDU_t *pdu);
//
//static
//int m3ap_eNB_handle_handover_preparation (instance_t instance,
// uint32_t assoc_id,
// uint32_t stream,
// M3AP_M3AP_PDU_t *pdu);
//static
//int m3ap_eNB_handle_handover_response (instance_t instance,
// uint32_t assoc_id,
// uint32_t stream,
// M3AP_M3AP_PDU_t *pdu);
//
//static
//int m3ap_eNB_handle_ue_context_release (instance_t instance,
// uint32_t assoc_id,
// uint32_t stream,
// M3AP_M3AP_PDU_t *pdu);
//
//static
//int m3ap_eNB_handle_handover_cancel (instance_t instance,
// uint32_t assoc_id,
// uint32_t stream,
// M3AP_M3AP_PDU_t *pdu);
/* Handlers matrix. Only eNB related procedure present here */
m3ap_message_decoded_callback m3ap_messages_callback[][3] = {
{ 0, 0, 0 }, /* MBMSSessionStart */
{ 0, 0, 0 }, /* MBMSSessionStop */
{ 0, 0, 0 }, /* MBMSSessionUpdate */
{ 0, 0, 0 }, /* MBMSSchedulingInformation */
{ 0, 0, 0 }, /* reset */
{ m3ap_eNB_handle_m3_setup_request, m3ap_eNB_handle_m3_setup_response, m3ap_eNB_handle_m3_setup_failure }, /* M3 Setup */
{ 0, 0, 0 }, /* eNBConfigurationUpdate */
{ 0, 0, 0 }, /* MCEConfigurationUpdate */
{ 0, 0, 0 }, /* MBMSServiceCounting */
};
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]);
}
void m3ap_handle_m3_setup_message(m3ap_eNB_instance_t *instance_p, m3ap_eNB_data_t *enb_desc_p, int sctp_shutdown)
{
if (sctp_shutdown) {
/* A previously connected eNB has been shutdown */
/* TODO check if it was used by some eNB and send a message to inform these eNB if there is no more associated eNB */
if (enb_desc_p->state == M3AP_ENB_STATE_CONNECTED) {
enb_desc_p->state = M3AP_ENB_STATE_DISCONNECTED;
if (instance_p-> m3_target_enb_associated_nb > 0) {
/* Decrease associated eNB number */
instance_p-> m3_target_enb_associated_nb --;
}
/* If there are no more associated eNB, inform eNB app */
if (instance_p->m3_target_enb_associated_nb == 0) {
MessageDef *message_p;
message_p = itti_alloc_new_message(TASK_M3AP, M3AP_DEREGISTERED_MCE_IND);
M3AP_DEREGISTERED_MCE_IND(message_p).nb_mme = 0;
itti_send_msg_to_task(TASK_ENB_APP, instance_p->instance, message_p);
}
}
} else {
/* Check that at least one setup message is pending */
DevCheck(instance_p->m3_target_enb_pending_nb > 0,
instance_p->instance,
instance_p->m3_target_enb_pending_nb, 0);
if (instance_p->m3_target_enb_pending_nb > 0) {
/* Decrease pending messages number */
instance_p->m3_target_enb_pending_nb --;
}
/* If there are no more pending messages, inform eNB app */
if (instance_p->m3_target_enb_pending_nb == 0) {
MessageDef *message_p;
message_p = itti_alloc_new_message(TASK_M3AP, M3AP_REGISTER_MCE_CNF);
M3AP_REGISTER_MCE_CNF(message_p).nb_mme = instance_p->m3_target_enb_associated_nb;
itti_send_msg_to_task(TASK_ENB_APP, instance_p->instance, message_p);
}
}
}
int m3ap_eNB_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 = 0;
DevAssert(data != NULL);
memset(&pdu, 0, sizeof(pdu));
//printf("Data length received: %d\n", data_length);
if (m3ap_eNB_decode_pdu(&pdu, data, data_length) < 0) {
M3AP_ERROR("Failed to decode PDU\n");
return -1;
}
switch (pdu.present) {
case M3AP_M3AP_PDU_PR_initiatingMessage:
/* Checking procedure Code and direction of message */
if (pdu.choice.initiatingMessage.procedureCode > sizeof(m3ap_messages_callback) / (3 * sizeof(
m3ap_message_decoded_callback))) {
//|| (pdu.present > M3AP_M3AP_PDU_PR_unsuccessfulOutcome)) {
M3AP_ERROR("[SCTP %d] Either procedureCode %ld exceed expected\n",
assoc_id, pdu.choice.initiatingMessage.procedureCode);
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_messages_callback[pdu.choice.initiatingMessage.procedureCode][pdu.present - 1] == NULL) {
M3AP_ERROR("[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 */
ret = (*m3ap_messages_callback[pdu.choice.initiatingMessage.procedureCode][pdu.present - 1])
(instance, assoc_id, stream, &pdu);
break;
case M3AP_M3AP_PDU_PR_successfulOutcome:
/* Checking procedure Code and direction of message */
if (pdu.choice.successfulOutcome.procedureCode > sizeof(m3ap_messages_callback) / (3 * sizeof(
m3ap_message_decoded_callback))) {
//|| (pdu.present > M3AP_M3AP_PDU_PR_unsuccessfulOutcome)) {
M3AP_ERROR("[SCTP %d] Either procedureCode %ld exceed expected\n",
assoc_id, pdu.choice.successfulOutcome.procedureCode);
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_messages_callback[pdu.choice.successfulOutcome.procedureCode][pdu.present - 1] == NULL) {
M3AP_ERROR("[SCTP %d] No handler for procedureCode %ld in %s\n",
assoc_id, pdu.choice.successfulOutcome.procedureCode,
m3ap_direction2String(pdu.present - 1));
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_M3AP_M3AP_PDU, &pdu);
return -1;
}
/* Calling the right handler */
ret = (*m3ap_messages_callback[pdu.choice.successfulOutcome.procedureCode][pdu.present - 1])
(instance, assoc_id, stream, &pdu);
break;
case M3AP_M3AP_PDU_PR_unsuccessfulOutcome:
/* Checking procedure Code and direction of message */
if (pdu.choice.unsuccessfulOutcome.procedureCode > sizeof(m3ap_messages_callback) / (3 * sizeof(
m3ap_message_decoded_callback))) {
//|| (pdu.present > M3AP_M3AP_PDU_PR_unsuccessfulOutcome)) {
M3AP_ERROR("[SCTP %d] Either procedureCode %ld exceed expected\n",
assoc_id, pdu.choice.unsuccessfulOutcome.procedureCode);
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_messages_callback[pdu.choice.unsuccessfulOutcome.procedureCode][pdu.present - 1] == NULL) {
M3AP_ERROR("[SCTP %d] No handler for procedureCode %ld in %s\n",
assoc_id, pdu.choice.unsuccessfulOutcome.procedureCode,
m3ap_direction2String(pdu.present - 1));
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_M3AP_M3AP_PDU, &pdu);
return -1;
}
/* Calling the right handler */
ret = (*m3ap_messages_callback[pdu.choice.unsuccessfulOutcome.procedureCode][pdu.present - 1])
(instance, assoc_id, stream, &pdu);
break;
default:
M3AP_ERROR("[SCTP %d] Direction %d exceed expected\n",
assoc_id, pdu.present);
break;
}
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_M3AP_M3AP_PDU, &pdu);
return ret;
}
int
m3ap_eNB_handle_m3_setup_request(instance_t instance,
uint32_t assoc_id,
uint32_t stream,
M3AP_M3AP_PDU_t *pdu)
{
M3AP_M3SetupRequest_t *m3SetupRequest;
//M3AP_M3SetupRequestIEs_t *ie;
//ServedCells__Member *servedCellMember;
m3ap_eNB_instance_t *instance_p;
m3ap_eNB_data_t *m3ap_eNB_data;
uint32_t eNB_id = 0;
DevAssert (pdu != NULL);
m3SetupRequest = &pdu->choice.initiatingMessage.value.choice.M3SetupRequest;
/*
* We received a new valid M3 Setup Request on a stream != 0.
* * * * This should not happen -> reject eNB m3 setup request.
*/
if (stream != 0) {
M3AP_ERROR("Received new m3 setup request on stream != 0\n");
/*
* Send a m3 setup failure with protocol cause unspecified
*/
return m3ap_eNB_generate_m3_setup_failure (instance,
assoc_id,
M3AP_Cause_PR_protocol,
M3AP_CauseProtocol_unspecified,
-1);
}
M3AP_DEBUG("Received a new M3 setup request\n");
//M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_M3SetupRequestIEs_t, ie, m3SetupRequest,
// M3AP_ProtocolIE_ID_id_GlobalENB_ID, true);
//if (ie == NULL ) {
// M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// return -1;
//} else {
// if (ie->value.choice.GlobalENB_ID.eNB_ID.present == M3AP_ENB_ID_PR_macro_eNB_ID) {
// // Home eNB ID = 28 bits
// uint8_t *eNB_id_buf = ie->value.choice.GlobalENB_ID.eNB_ID.choice.macro_eNB_ID.buf;
// if (ie->value.choice.GlobalENB_ID.eNB_ID.choice.macro_eNB_ID.size != 28) {
// //TODO: handle case were size != 28 -> notify ? reject ?
// }
// eNB_id = (eNB_id_buf[0] << 20) + (eNB_id_buf[1] << 12) + (eNB_id_buf[2] << 4) + ((eNB_id_buf[3] & 0xf0) >> 4);
// M3AP_DEBUG("Home eNB id: %07x\n", eNB_id);
// } else {
// // Macro eNB = 20 bits
// uint8_t *eNB_id_buf = ie->value.choice.GlobalENB_ID.eNB_ID.choice.macro_eNB_ID.buf;
// if (ie->value.choice.GlobalENB_ID.eNB_ID.choice.macro_eNB_ID.size != 20) {
// //TODO: handle case were size != 20 -> notify ? reject ?
// }
// eNB_id = (eNB_id_buf[0] << 12) + (eNB_id_buf[1] << 4) + ((eNB_id_buf[2] & 0xf0) >> 4);
// M3AP_DEBUG("macro eNB id: %05x\n", eNB_id);
// }
//}
M3AP_DEBUG("Adding eNB to the list of associated eNBs\n");
if ((m3ap_eNB_data = m3ap_is_eNB_id_in_list (eNB_id)) == NULL) {
/*
* eNB has not been found in list of associated eNB,
* * * * Add it to the tail of list and initialize data
*/
if ((m3ap_eNB_data = m3ap_is_eNB_assoc_id_in_list (assoc_id)) == NULL) {
/*
* ??
*/
return -1;
} else {
m3ap_eNB_data->state = M3AP_ENB_STATE_RESETTING;
m3ap_eNB_data->eNB_id = eNB_id;
}
} else {
m3ap_eNB_data->state = M3AP_ENB_STATE_RESETTING;
/*
* eNB has been found in list, consider the m3 setup request as a reset connection,
* * * * reseting any previous UE state if sctp association is != than the previous one
*/
if (m3ap_eNB_data->assoc_id != assoc_id) {
/*
* ??: Send an overload cause...
*/
M3AP_ERROR("Rejecting m3 setup request as eNB id %d is already associated to an active sctp association" "Previous known: %d, new one: %d\n", eNB_id, m3ap_eNB_data->assoc_id, assoc_id);
m3ap_eNB_generate_m3_setup_failure (instance,
assoc_id,
M3AP_Cause_PR_protocol,
M3AP_CauseProtocol_unspecified,
-1);
return -1;
}
/*
* TODO: call the reset procedure
*/
}
/* Set proper pci */
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_M3SetupRequest_IEs_t, ie, m2SetupRequest,
// M3AP_ProtocolIE_ID_id_ServedCells, true);
// if (ie == NULL ) {
// M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// return -1;
// }
// if (ie->value.choice.ServedCells.list.count > 0) {
// m3ap_eNB_data->num_cc = ie->value.choice.ServedCells.list.count;
// for (int i=0; i<ie->value.choice.ServedCells.list.count;i++) {
// servedCellMember = (ServedCells__Member *)ie->value.choice.ServedCells.list.array[i];
// m3ap_eNB_data->Nid_cell[i] = servedCellMember->servedCellInfo.pCI;
// }
// }
//
instance_p = m3ap_eNB_get_instance(instance);
DevAssert(instance_p != NULL);
return m3ap_eNB_generate_m3_setup_response(instance_p, m3ap_eNB_data);
}
static
int m3ap_eNB_handle_m3_setup_response(instance_t instance,
uint32_t assoc_id,
uint32_t stream,
M3AP_M3AP_PDU_t *pdu)
{
M3AP_M3SetupResponse_t *m3SetupResponse;
//M3AP_M3SetupResponseIEs_t *ie;
//ServedCells__Member *servedCellMember;
m3ap_eNB_instance_t *instance_p;
m3ap_eNB_data_t *m3ap_eNB_data;
//uint32_t eNB_id = 0;
DevAssert (pdu != NULL);
m3SetupResponse = &pdu->choice.successfulOutcome.value.choice.M3SetupResponse;
/*
* We received a new valid M3 Setup Response on a stream != 0.
* * * * This should not happen -> reject eNB m3 setup response.
*/
if (stream != 0) {
M3AP_ERROR("Received new m3 setup response on stream != 0\n");
}
if ((m3ap_eNB_data = m3ap_get_eNB(NULL, assoc_id, 0)) == NULL) {
M3AP_ERROR("[SCTP %d] Received M3 setup response for non existing "
"eNB context\n", assoc_id);
return -1;
}
M3AP_DEBUG("Received a new M3 setup response\n");
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_M3SetupResponseIEs_t, ie, m3SetupResponse,
// M3AP_ProtocolIE_ID_id_GlobalENB_ID, true);
// if (ie == NULL ) {
// M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// return -1;
// }
// if (ie->value.choice.GlobalENB_ID.eNB_ID.present == M3AP_ENB_ID_PR_macro_eNB_ID) {
// // Home eNB ID = 28 bits
// uint8_t *eNB_id_buf = ie->value.choice.GlobalENB_ID.eNB_ID.choice.macro_eNB_ID.buf;
//
// if (ie->value.choice.GlobalENB_ID.eNB_ID.choice.macro_eNB_ID.size != 28) {
// //TODO: handle case were size != 28 -> notify ? reject ?
// }
//
// eNB_id = (eNB_id_buf[0] << 20) + (eNB_id_buf[1] << 12) + (eNB_id_buf[2] << 4) + ((eNB_id_buf[3] & 0xf0) >> 4);
// M3AP_DEBUG("Home eNB id: %07x\n", eNB_id);
// } else {
// // Macro eNB = 20 bits
// uint8_t *eNB_id_buf = ie->value.choice.GlobalENB_ID.eNB_ID.choice.macro_eNB_ID.buf;
//
// if (ie->value.choice.GlobalENB_ID.eNB_ID.choice.macro_eNB_ID.size != 20) {
// //TODO: handle case were size != 20 -> notify ? reject ?
// }
//
// eNB_id = (eNB_id_buf[0] << 12) + (eNB_id_buf[1] << 4) + ((eNB_id_buf[2] & 0xf0) >> 4);
// M3AP_DEBUG("macro eNB id: %05x\n", eNB_id);
// }
//
M3AP_DEBUG("Adding eNB to the list of associated eNBs\n");
// if ((m3ap_eNB_data = m3ap_is_eNB_id_in_list (eNB_id)) == NULL) {
// /*
// * eNB has not been found in list of associated eNB,
// * * * * Add it to the tail of list and initialize data
// */
// if ((m3ap_eNB_data = m3ap_is_eNB_assoc_id_in_list (assoc_id)) == NULL) {
// /*
// * ??: Send an overload cause...
// */
// return -1;
// } else {
// m3ap_eNB_data->state = M3AP_ENB_STATE_RESETTING;
// m3ap_eNB_data->eNB_id = eNB_id;
// }
// } else {
// m3ap_eNB_data->state = M3AP_ENB_STATE_RESETTING;
// /*
// * TODO: call the reset procedure
// */
// }
//
/* Set proper pci */
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_M3SetupResponse_IEs_t, ie, m2SetupResponse,
// M3AP_ProtocolIE_ID_id_ServedCells, true);
// if (ie == NULL ) {
// M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// return -1;
// }
//
// if (ie->value.choice.ServedCells.list.count > 0) {
// m3ap_eNB_data->num_cc = ie->value.choice.ServedCells.list.count;
// for (int i=0; i<ie->value.choice.ServedCells.list.count;i++) {
// servedCellMember = (ServedCells__Member *)ie->value.choice.ServedCells.list.array[i];
// m3ap_eNB_data->Nid_cell[i] = servedCellMember->servedCellInfo.pCI;
// }
// }
//
/* Optionaly set the target eNB name */
/* The association is now ready as source and target eNBs know parameters of each other.
* Mark the association as connected.
*/
m3ap_eNB_data->state = M3AP_ENB_STATE_READY;
instance_p = m3ap_eNB_get_instance(instance);
DevAssert(instance_p != NULL);
instance_p->m3_target_enb_associated_nb ++;
m3ap_handle_m3_setup_message(instance_p, m3ap_eNB_data, 0);
return 0;
}
static
int m3ap_eNB_handle_m3_setup_failure(instance_t instance,
uint32_t assoc_id,
uint32_t stream,
M3AP_M3AP_PDU_t *pdu)
{
M3AP_M3SetupFailure_t *m3SetupFailure;
M3AP_M3SetupFailureIEs_t *ie;
m3ap_eNB_instance_t *instance_p;
m3ap_eNB_data_t *m3ap_eNB_data;
DevAssert(pdu != NULL);
m3SetupFailure = &pdu->choice.unsuccessfulOutcome.value.choice.M3SetupFailure;
/*
* We received a new valid M3 Setup Failure on a stream != 0.
* * * * This should not happen -> reject eNB m3 setup failure.
*/
if (stream != 0) {
M3AP_WARN("[SCTP %d] Received m3 setup failure on stream != 0 (%d)\n",
assoc_id, stream);
}
if ((m3ap_eNB_data = m3ap_get_eNB (NULL, assoc_id, 0)) == NULL) {
M3AP_ERROR("[SCTP %d] Received M3 setup failure for non existing "
"eNB context\n", assoc_id);
return -1;
}
M3AP_DEBUG("Received a new M3 setup failure\n");
M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_M3SetupFailureIEs_t, ie, m3SetupFailure,
M3AP_ProtocolIE_ID_id_Cause, true);
if (ie == NULL ) {
M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
return -1;
}
// need a FSM to handle all cases
if ((ie->value.choice.Cause.present == M3AP_Cause_PR_misc) &&
(ie->value.choice.Cause.choice.misc == M3AP_CauseMisc_unspecified)) {
M3AP_WARN("Received M3 setup failure for eNB ... eNB is not ready\n");
} else {
M3AP_ERROR("Received m3 setup failure for eNB... please check your parameters\n");
}
m3ap_eNB_data->state = M3AP_ENB_STATE_WAITING;
instance_p = m3ap_eNB_get_instance(instance);
DevAssert(instance_p != NULL);
m3ap_handle_m3_setup_message(instance_p, m3ap_eNB_data, 0);
return 0;
}
//static
//int m3ap_eNB_handle_handover_preparation (instance_t instance,
// uint32_t assoc_id,
// uint32_t stream,
// M3AP_M3AP_PDU_t *pdu)
//{
//
// M3AP_HandoverRequest_t *x2HandoverRequest;
// M3AP_HandoverRequest_IEs_t *ie;
//
// M3AP_E_RABs_ToBeSetup_ItemIEs_t *e_RABS_ToBeSetup_ItemIEs;
// M3AP_E_RABs_ToBeSetup_Item_t *e_RABs_ToBeSetup_Item;
//
// m3ap_eNB_instance_t *instance_p;
// m3ap_eNB_data_t *m3ap_eNB_data;
// MessageDef *msg;
// int ue_id;
//
// DevAssert (pdu != NULL);
// x2HandoverRequest = &pdu->choice.initiatingMessage.value.choice.HandoverRequest;
//
// if (stream == 0) {
// M3AP_ERROR ("Received new x2 handover request on stream == 0\n");
// /* TODO: send a x2 failure response */
// return 0;
// }
//
// M3AP_DEBUG ("Received a new X2 handover request\n");
//
// m3ap_eNB_data = m3ap_get_eNB(NULL, assoc_id, 0);
// DevAssert(m3ap_eNB_data != NULL);
//
// instance_p = m3ap_eNB_get_instance(instance);
// DevAssert(instance_p != NULL);
//
// msg = itti_alloc_new_message(TASK_M3AP, M3AP_HANDOVER_REQ);
//
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_HandoverRequest_IEs_t, ie, x2HandoverRequest,
// M3AP_ProtocolIE_ID_id_Old_eNB_UE_M3AP_ID, true);
// if (ie == NULL ) {
// M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// return -1;
// }
//
// /* allocate a new M3AP UE ID */
// ue_id = m3ap_allocate_new_id(&instance_p->id_manager);
// if (ue_id == -1) {
// M3AP_ERROR("could not allocate a new M3AP UE ID\n");
// /* TODO: cancel handover: send HO preparation failure to source eNB */
// exit(1);
// }
// /* rnti is unknown yet, must not be set to -1, 0 is fine */
// m3ap_set_ids(&instance_p->id_manager, ue_id, 0, ie->value.choice.UE_M3AP_ID, ue_id);
// m3ap_id_set_state(&instance_p->id_manager, ue_id, X2ID_STATE_TARGET);
//
// M3AP_HANDOVER_REQ(msg).m2_id = ue_id;
//
// //M3AP_HANDOVER_REQ(msg).target_physCellId = measResults2->measResultNeighCells->choice.
// //measResultListEUTRA.list.array[ncell_index]->physCellId;
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_HandoverRequest_IEs_t, ie, x2HandoverRequest,
// M3AP_ProtocolIE_ID_id_GUMMEI_ID, true);
//
// TBCD_TO_MCC_MNC(&ie->value.choice.ECGI.pLMN_Identity, M3AP_HANDOVER_REQ(msg).ue_gummei.mcc,
// M3AP_HANDOVER_REQ(msg).ue_gummei.mnc, M3AP_HANDOVER_REQ(msg).ue_gummei.mnc_len);
// OCTET_STRING_TO_INT8(&ie->value.choice.GUMMEI.mME_Code, M3AP_HANDOVER_REQ(msg).ue_gummei.mme_code);
// OCTET_STRING_TO_INT16(&ie->value.choice.GUMMEI.gU_Group_ID.mME_Group_ID, M3AP_HANDOVER_REQ(msg).ue_gummei.mme_group_id);
//
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_HandoverRequest_IEs_t, ie, x2HandoverRequest,
// M3AP_ProtocolIE_ID_id_UE_ContextInformation, true);
//
// if (ie == NULL ) {
// M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// return -1;
// }
//
// M3AP_HANDOVER_REQ(msg).mme_ue_s1ap_id = ie->value.choice.UE_ContextInformation.mME_UE_S1AP_ID;
//
// /* TODO: properly store Target Cell ID */
//
// M3AP_HANDOVER_REQ(msg).target_assoc_id = assoc_id;
//
// M3AP_HANDOVER_REQ(msg).security_capabilities.encryption_algorithms =
// BIT_STRING_to_uint16(&ie->value.choice.UE_ContextInformation.uESecurityCapabilities.encryptionAlgorithms);
// M3AP_HANDOVER_REQ(msg).security_capabilities.integrity_algorithms =
// BIT_STRING_to_uint16(&ie->value.choice.UE_ContextInformation.uESecurityCapabilities.integrityProtectionAlgorithms);
//
// //M3AP_HANDOVER_REQ(msg).ue_ambr=ue_context_pP->ue_context.ue_ambr;
//
// if ((ie->value.choice.UE_ContextInformation.aS_SecurityInformation.key_eNodeB_star.buf) &&
// (ie->value.choice.UE_ContextInformation.aS_SecurityInformation.key_eNodeB_star.size == 32)) {
// memcpy(M3AP_HANDOVER_REQ(msg).kenb, ie->value.choice.UE_ContextInformation.aS_SecurityInformation.key_eNodeB_star.buf, 32);
// M3AP_HANDOVER_REQ(msg).kenb_ncc = ie->value.choice.UE_ContextInformation.aS_SecurityInformation.nextHopChainingCount;
// } else {
// M3AP_WARN ("Size of eNB key star does not match the expected value\n");
// }
//
// if (ie->value.choice.UE_ContextInformation.e_RABs_ToBeSetup_List.list.count > 0) {
//
// M3AP_HANDOVER_REQ(msg).nb_e_rabs_tobesetup = ie->value.choice.UE_ContextInformation.e_RABs_ToBeSetup_List.list.count;
//
// for (int i=0;i<ie->value.choice.UE_ContextInformation.e_RABs_ToBeSetup_List.list.count;i++) {
// e_RABS_ToBeSetup_ItemIEs = (M3AP_E_RABs_ToBeSetup_ItemIEs_t *) ie->value.choice.UE_ContextInformation.e_RABs_ToBeSetup_List.list.array[i];
// e_RABs_ToBeSetup_Item = &e_RABS_ToBeSetup_ItemIEs->value.choice.E_RABs_ToBeSetup_Item;
//
// M3AP_HANDOVER_REQ(msg).e_rabs_tobesetup[i].e_rab_id = e_RABs_ToBeSetup_Item->e_RAB_ID ;
//
// memcpy(M3AP_HANDOVER_REQ(msg).e_rabs_tobesetup[i].eNB_addr.buffer,
// e_RABs_ToBeSetup_Item->uL_GTPtunnelEndpoint.transportLayerAddress.buf,
// e_RABs_ToBeSetup_Item->uL_GTPtunnelEndpoint.transportLayerAddress.size);
//
// M3AP_HANDOVER_REQ(msg).e_rabs_tobesetup[i].eNB_addr.length =
// e_RABs_ToBeSetup_Item->uL_GTPtunnelEndpoint.transportLayerAddress.size * 8 - e_RABs_ToBeSetup_Item->uL_GTPtunnelEndpoint.transportLayerAddress.bits_unused;
//
// OCTET_STRING_TO_INT32(&e_RABs_ToBeSetup_Item->uL_GTPtunnelEndpoint.gTP_TEID,
// M3AP_HANDOVER_REQ(msg).e_rabs_tobesetup[i].gtp_teid);
//
// M3AP_HANDOVER_REQ(msg).e_rab_param[i].qos.qci = e_RABs_ToBeSetup_Item->e_RAB_Level_QoS_Parameters.qCI;
// M3AP_HANDOVER_REQ(msg).e_rab_param[i].qos.allocation_retention_priority.priority_level = e_RABs_ToBeSetup_Item->e_RAB_Level_QoS_Parameters.allocationAndRetentionPriority.priorityLevel;
// M3AP_HANDOVER_REQ(msg).e_rab_param[i].qos.allocation_retention_priority.pre_emp_capability = e_RABs_ToBeSetup_Item->e_RAB_Level_QoS_Parameters.allocationAndRetentionPriority.pre_emptionCapability;
// M3AP_HANDOVER_REQ(msg).e_rab_param[i].qos.allocation_retention_priority.pre_emp_vulnerability = e_RABs_ToBeSetup_Item->e_RAB_Level_QoS_Parameters.allocationAndRetentionPriority.pre_emptionVulnerability;
// }
//
// }
// else {
// M3AP_ERROR ("Can't decode the e_RABs_ToBeSetup_List \n");
// }
//
// M3AP_RRC_Context_t *c = &ie->value.choice.UE_ContextInformation.rRC_Context;
//
// if (c->size > 1024 /* TODO: this is the size of rrc_buffer in struct m3ap_handover_req_ack_s*/)
// { printf("%s:%d: fatal: buffer too big\n", __FILE__, __LINE__); abort(); }
//
// memcpy(M3AP_HANDOVER_REQ(msg).rrc_buffer, c->buf, c->size);
// M3AP_HANDOVER_REQ(msg).rrc_buffer_size = c->size;
//
// itti_send_msg_to_task(TASK_RRC_ENB, instance_p->instance, msg);
//
// return 0;
//}
//
//static
//int m3ap_eNB_handle_handover_response (instance_t instance,
// uint32_t assoc_id,
// uint32_t stream,
// M3AP_M3AP_PDU_t *pdu)
//{
// M3AP_HandoverRequestAcknowledge_t *x2HandoverRequestAck;
// M3AP_HandoverRequestAcknowledge_IEs_t *ie;
//
// m3ap_eNB_instance_t *instance_p;
// m3ap_eNB_data_t *m3ap_eNB_data;
// MessageDef *msg;
// int ue_id;
// int id_source;
// int id_target;
// int rnti;
//
// DevAssert (pdu != NULL);
// x2HandoverRequestAck = &pdu->choice.successfulOutcome.value.choice.HandoverRequestAcknowledge;
//
// if (stream == 0) {
// M3AP_ERROR ("Received new x2 handover response on stream == 0\n");
// /* TODO: send a x2 failure response */
// return 0;
// }
//
// M3AP_DEBUG ("Received a new X2 handover response\n");
//
// m3ap_eNB_data = m3ap_get_eNB(NULL, assoc_id, 0);
// DevAssert(m3ap_eNB_data != NULL);
//
// instance_p = m3ap_eNB_get_instance(instance);
// DevAssert(instance_p != NULL);
//
// msg = itti_alloc_new_message(TASK_M3AP, M3AP_HANDOVER_REQ_ACK);
//
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_HandoverRequestAcknowledge_IEs_t, ie, x2HandoverRequestAck,
// M3AP_ProtocolIE_ID_id_Old_eNB_UE_M3AP_ID, true);
//
// if (ie == NULL ) {
// M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// return -1;
// }
//
// id_source = ie->value.choice.UE_M3AP_ID;
//
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_HandoverRequestAcknowledge_IEs_t, ie, x2HandoverRequestAck,
// M3AP_ProtocolIE_ID_id_New_eNB_UE_M3AP_ID, true);
//
// if (ie == NULL ) {
// M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// return -1;
// }
//
// id_target = ie->value.choice.UE_M3AP_ID_1;
//
// ue_id = id_source;
//
// if (ue_id != m3ap_find_id_from_id_source(&instance_p->id_manager, id_source)) {
// M3AP_WARN("incorrect/unknown M3AP IDs for UE (old ID %d new ID %d), ignoring handover response\n",
// id_source, id_target);
// return 0;
// }
//
// rnti = m3ap_id_get_rnti(&instance_p->id_manager, ue_id);
//
// /* id_target is a new information, store it */
// m3ap_set_ids(&instance_p->id_manager, ue_id, rnti, id_source, id_target);
// m3ap_id_set_state(&instance_p->id_manager, ue_id, X2ID_STATE_SOURCE_OVERALL);
// m3ap_set_reloc_overall_timer(&instance_p->id_manager, ue_id,
// m3ap_timer_get_tti(&instance_p->timers));
//
// M3AP_HANDOVER_REQ_ACK(msg).rnti = rnti;
//
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_HandoverRequestAcknowledge_IEs_t, ie, x2HandoverRequestAck,
// M3AP_ProtocolIE_ID_id_TargeteNBtoSource_eNBTransparentContainer, true);
//
// M3AP_TargeteNBtoSource_eNBTransparentContainer_t *c = &ie->value.choice.TargeteNBtoSource_eNBTransparentContainer;
//
// if (c->size > 1024 /* TODO: this is the size of rrc_buffer in struct m3ap_handover_req_ack_s*/)
// { printf("%s:%d: fatal: buffer too big\n", __FILE__, __LINE__); abort(); }
//
// memcpy(M3AP_HANDOVER_REQ_ACK(msg).rrc_buffer, c->buf, c->size);
// M3AP_HANDOVER_REQ_ACK(msg).rrc_buffer_size = c->size;
//
// itti_send_msg_to_task(TASK_RRC_ENB, instance_p->instance, msg);
// return 0;
//}
//
//
//static
//int m3ap_eNB_handle_ue_context_release (instance_t instance,
// uint32_t assoc_id,
// uint32_t stream,
// M3AP_M3AP_PDU_t *pdu)
//{
// M3AP_UEContextRelease_t *x2UEContextRelease;
// M3AP_UEContextRelease_IEs_t *ie;
//
// m3ap_eNB_instance_t *instance_p;
// m3ap_eNB_data_t *m3ap_eNB_data;
// MessageDef *msg;
// int ue_id;
// int id_source;
// int id_target;
//
// DevAssert (pdu != NULL);
// x2UEContextRelease = &pdu->choice.initiatingMessage.value.choice.UEContextRelease;
//
// if (stream == 0) {
// M3AP_ERROR ("Received new x2 ue context release on stream == 0\n");
// /* TODO: send a x2 failure response */
// return 0;
// }
//
// M3AP_DEBUG ("Received a new X2 ue context release\n");
//
// m3ap_eNB_data = m3ap_get_eNB(NULL, assoc_id, 0);
// DevAssert(m3ap_eNB_data != NULL);
//
// instance_p = m3ap_eNB_get_instance(instance);
// DevAssert(instance_p != NULL);
//
// msg = itti_alloc_new_message(TASK_M3AP, M3AP_UE_CONTEXT_RELEASE);
//
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_UEContextRelease_IEs_t, ie, x2UEContextRelease,
// M3AP_ProtocolIE_ID_id_Old_eNB_UE_M3AP_ID, true);
//
// if (ie == NULL ) {
// M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// return -1;
// }
//
// id_source = ie->value.choice.UE_M3AP_ID;
//
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_UEContextRelease_IEs_t, ie, x2UEContextRelease,
// M3AP_ProtocolIE_ID_id_New_eNB_UE_M3AP_ID, true);
//
// if (ie == NULL ) {
// M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// return -1;
// }
//
// id_target = ie->value.choice.UE_M3AP_ID_1;
//
// ue_id = id_source;
// if (ue_id != m3ap_find_id_from_id_source(&instance_p->id_manager, id_source)) {
// M3AP_WARN("incorrect/unknown M3AP IDs for UE (old ID %d new ID %d), ignoring UE context release\n",
// id_source, id_target);
// return 0;
// }
//
// if (id_target != m3ap_id_get_id_target(&instance_p->id_manager, ue_id)) {
// M3AP_ERROR("UE context release: bad id_target for UE %x (id_source %d) expected %d got %d, ignoring message\n",
// m3ap_id_get_rnti(&instance_p->id_manager, ue_id),
// id_source,
// m3ap_id_get_id_target(&instance_p->id_manager, ue_id),
// id_target);
// return 0;
// }
//
// M3AP_UE_CONTEXT_RELEASE(msg).rnti = m3ap_id_get_rnti(&instance_p->id_manager, ue_id);
//
// itti_send_msg_to_task(TASK_RRC_ENB, instance_p->instance, msg);
//
// m3ap_release_id(&instance_p->id_manager, ue_id);
//
// return 0;
//}
//
//static
//int m3ap_eNB_handle_handover_cancel (instance_t instance,
// uint32_t assoc_id,
// uint32_t stream,
// M3AP_M3AP_PDU_t *pdu)
//{
// M3AP_HandoverCancel_t *x2HandoverCancel;
// M3AP_HandoverCancel_IEs_t *ie;
//
// m3ap_eNB_instance_t *instance_p;
// m3ap_eNB_data_t *m3ap_eNB_data;
// MessageDef *msg;
// int ue_id;
// int id_source;
// int id_target;
// m3ap_handover_cancel_cause_t cause;
//
// DevAssert (pdu != NULL);
// x2HandoverCancel = &pdu->choice.initiatingMessage.value.choice.HandoverCancel;
//
// if (stream == 0) {
// M3AP_ERROR ("Received new x2 handover cancel on stream == 0\n");
// return 0;
// }
//
// M3AP_DEBUG ("Received a new X2 handover cancel\n");
//
// m3ap_eNB_data = m3ap_get_eNB(NULL, assoc_id, 0);
// DevAssert(m3ap_eNB_data != NULL);
//
// instance_p = m3ap_eNB_get_instance(instance);
// DevAssert(instance_p != NULL);
//
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_HandoverCancel_IEs_t, ie, x2HandoverCancel,
// M3AP_ProtocolIE_ID_id_Old_eNB_UE_M3AP_ID, true);
//
// if (ie == NULL ) {
// M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// return -1;
// }
//
// id_source = ie->value.choice.UE_M3AP_ID;
//
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_HandoverCancel_IEs_t, ie, x2HandoverCancel,
// M3AP_ProtocolIE_ID_id_New_eNB_UE_M3AP_ID, false);
//
// if (ie == NULL ) {
// M3AP_INFO("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// id_target = -1;
// } else
// id_target = ie->value.choice.UE_M3AP_ID_1;
//
// M3AP_FIND_PROTOCOLIE_BY_ID(M3AP_HandoverCancel_IEs_t, ie, x2HandoverCancel,
// M3AP_ProtocolIE_ID_id_Cause, true);
//
// if (ie == NULL ) {
// M3AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
// return -1;
// }
//
// if (ie->value.present != M3AP_HandoverCancel_IEs__value_PR_Cause ||
// ie->value.choice.Cause.present != M3AP_Cause_PR_radioNetwork ||
// !(ie->value.choice.Cause.choice.radioNetwork ==
// M3AP_CauseRadioNetwork_trelocprep_expiry ||
// ie->value.choice.Cause.choice.radioNetwork ==
// M3AP_CauseRadioNetwork_tx2relocoverall_expiry)) {
// M3AP_ERROR("%s %d: Cause not supported (only T_reloc_prep and TX2_reloc_overall handled)\n",__FILE__,__LINE__);
// return -1;
// }
//
// switch (ie->value.choice.Cause.choice.radioNetwork) {
// case M3AP_CauseRadioNetwork_trelocprep_expiry:
// cause = M3AP_T_RELOC_PREP_TIMEOUT;
// break;
// case M3AP_CauseRadioNetwork_tx2relocoverall_expiry:
// cause = M3AP_TX2_RELOC_OVERALL_TIMEOUT;
// break;
// default: /* can't come here */ exit(1);
// }
//
// ue_id = m3ap_find_id_from_id_source(&instance_p->id_manager, id_source);
// if (ue_id == -1) {
// M3AP_WARN("Handover cancel: UE not found (id_source = %d), ignoring message\n", id_source);
// return 0;
// }
//
// if (id_target != -1 &&
// id_target != m3ap_id_get_id_target(&instance_p->id_manager, ue_id)) {
// M3AP_ERROR("Handover cancel: bad id_target for UE %x (id_source %d) expected %d got %d\n",
// m3ap_id_get_rnti(&instance_p->id_manager, ue_id),
// id_source,
// m3ap_id_get_id_target(&instance_p->id_manager, ue_id),
// id_target);
// exit(1);
// }
//
// msg = itti_alloc_new_message(TASK_M3AP, M3AP_HANDOVER_CANCEL);
//
// M3AP_HANDOVER_CANCEL(msg).rnti = m3ap_id_get_rnti(&instance_p->id_manager, ue_id);
// M3AP_HANDOVER_CANCEL(msg).cause = cause;
//
// itti_send_msg_to_task(TASK_RRC_ENB, instance_p->instance, msg);
//
// m3ap_release_id(&instance_p->id_manager, ue_id);
//
// return 0;
//}
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