/*
* 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 s1ap_eNB_handlers.c
* \brief s1ap messages handlers for eNB part
* \author Sebastien ROUX and Navid Nikaein
* \email navid.nikaein@eurecom.fr
* \date 2013 - 2015
* \version 0.1
*/
#include <stdint.h>
#include "intertask_interface.h"
#include "asn1_conversions.h"
#include "s1ap_common.h"
// #include "s1ap_eNB.h"
#include "s1ap_eNB_defs.h"
#include "s1ap_eNB_handlers.h"
#include "s1ap_eNB_decoder.h"
#include "s1ap_eNB_ue_context.h"
#include "s1ap_eNB_trace.h"
#include "s1ap_eNB_nas_procedures.h"
#include "s1ap_eNB_management_procedures.h"
#include "s1ap_eNB_default_values.h"
#include "assertions.h"
#include "conversions.h"
#include "msc.h"
static
int s1ap_eNB_handle_s1_setup_response(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu);
static
int s1ap_eNB_handle_s1_setup_failure(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu);
static
int s1ap_eNB_handle_error_indication(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu);
static
int s1ap_eNB_handle_initial_context_request(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu);
static
int s1ap_eNB_handle_ue_context_release_command(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu);
static
int s1ap_eNB_handle_e_rab_setup_request(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu);
static
int s1ap_eNB_handle_paging(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu);
static
int s1ap_eNB_handle_e_rab_modify_request(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu);
static
int s1ap_eNB_handle_e_rab_release_command(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu);
/* Handlers matrix. Only eNB related procedure present here */
s1ap_message_decoded_callback messages_callback[][3] = {
{ 0, 0, 0 }, /* HandoverPreparation */
{ 0, 0, 0 }, /* HandoverResourceAllocation */
{ 0, 0, 0 }, /* HandoverNotification */
{ 0, 0, 0 }, /* PathSwitchRequest */
{ 0, 0, 0 }, /* HandoverCancel */
{ s1ap_eNB_handle_e_rab_setup_request, 0, 0 }, /* E_RABSetup */
{ s1ap_eNB_handle_e_rab_modify_request, 0, 0 }, /* E_RABModify */
{ s1ap_eNB_handle_e_rab_release_command, 0, 0 }, /* E_RABRelease */
{ 0, 0, 0 }, /* E_RABReleaseIndication */
{ s1ap_eNB_handle_initial_context_request, 0, 0 }, /* InitialContextSetup */
{ s1ap_eNB_handle_paging, 0, 0 }, /* Paging */
{ s1ap_eNB_handle_nas_downlink, 0, 0 }, /* downlinkNASTransport */
{ 0, 0, 0 }, /* initialUEMessage */
{ 0, 0, 0 }, /* uplinkNASTransport */
{ 0, 0, 0 }, /* Reset */
{ s1ap_eNB_handle_error_indication, 0, 0 }, /* ErrorIndication */
{ 0, 0, 0 }, /* NASNonDeliveryIndication */
{ 0, s1ap_eNB_handle_s1_setup_response, s1ap_eNB_handle_s1_setup_failure }, /* S1Setup */
{ 0, 0, 0 }, /* UEContextReleaseRequest */
{ 0, 0, 0 }, /* DownlinkS1cdma2000tunneling */
{ 0, 0, 0 }, /* UplinkS1cdma2000tunneling */
{ 0, 0, 0 }, /* UEContextModification */
{ 0, 0, 0 }, /* UECapabilityInfoIndication */
{ s1ap_eNB_handle_ue_context_release_command, 0, 0 }, /* UEContextRelease */
{ 0, 0, 0 }, /* eNBStatusTransfer */
{ 0, 0, 0 }, /* MMEStatusTransfer */
{ s1ap_eNB_handle_deactivate_trace, 0, 0 }, /* DeactivateTrace */
{ s1ap_eNB_handle_trace_start, 0, 0 }, /* TraceStart */
{ 0, 0, 0 }, /* TraceFailureIndication */
{ 0, 0, 0 }, /* ENBConfigurationUpdate */
{ 0, 0, 0 }, /* MMEConfigurationUpdate */
{ 0, 0, 0 }, /* LocationReportingControl */
{ 0, 0, 0 }, /* LocationReportingFailureIndication */
{ 0, 0, 0 }, /* LocationReport */
{ 0, 0, 0 }, /* OverloadStart */
{ 0, 0, 0 }, /* OverloadStop */
{ 0, 0, 0 }, /* WriteReplaceWarning */
{ 0, 0, 0 }, /* eNBDirectInformationTransfer */
{ 0, 0, 0 }, /* MMEDirectInformationTransfer */
{ 0, 0, 0 }, /* PrivateMessage */
{ 0, 0, 0 }, /* eNBConfigurationTransfer */
{ 0, 0, 0 }, /* MMEConfigurationTransfer */
{ 0, 0, 0 }, /* CellTrafficTrace */
#if (S1AP_VERSION >= MAKE_VERSION(9, 0, 0))
{ 0, 0, 0 }, /* Kill */
{ 0, 0, 0 }, /* DownlinkUEAssociatedLPPaTransport */
{ 0, 0, 0 }, /* UplinkUEAssociatedLPPaTransport */
{ 0, 0, 0 }, /* DownlinkNonUEAssociatedLPPaTransport */
{ 0, 0, 0 }, /* UplinkNonUEAssociatedLPPaTransport */
#endif /* #if (S1AP_VERSION >= MAKE_VERSION(9, 0, 0)) */
};
char *s1ap_direction2String(int s1ap_dir) {
static char *s1ap_direction_String[] = {
"", /* Nothing */
"Originating message", /* originating message */
"Successfull outcome", /* successfull outcome */
"UnSuccessfull outcome", /* successfull outcome */
};
return(s1ap_direction_String[s1ap_dir]);
}
void s1ap_handle_s1_setup_message(s1ap_eNB_mme_data_t *mme_desc_p, int sctp_shutdown) {
if (sctp_shutdown) {
/* A previously connected MME 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 MME */
if (mme_desc_p->state == S1AP_ENB_STATE_CONNECTED) {
mme_desc_p->state = S1AP_ENB_STATE_DISCONNECTED;
if (mme_desc_p->s1ap_eNB_instance->s1ap_mme_associated_nb > 0) {
/* Decrease associated MME number */
mme_desc_p->s1ap_eNB_instance->s1ap_mme_associated_nb --;
}
/* If there are no more associated MME, inform eNB app */
if (mme_desc_p->s1ap_eNB_instance->s1ap_mme_associated_nb == 0) {
MessageDef *message_p;
message_p = itti_alloc_new_message(TASK_S1AP, S1AP_DEREGISTERED_ENB_IND);
S1AP_DEREGISTERED_ENB_IND(message_p).nb_mme = 0;
itti_send_msg_to_task(TASK_ENB_APP, mme_desc_p->s1ap_eNB_instance->instance, message_p);
}
}
} else {
/* Check that at least one setup message is pending */
DevCheck(mme_desc_p->s1ap_eNB_instance->s1ap_mme_pending_nb > 0, mme_desc_p->s1ap_eNB_instance->instance,
mme_desc_p->s1ap_eNB_instance->s1ap_mme_pending_nb, 0);
if (mme_desc_p->s1ap_eNB_instance->s1ap_mme_pending_nb > 0) {
/* Decrease pending messages number */
mme_desc_p->s1ap_eNB_instance->s1ap_mme_pending_nb --;
}
/* If there are no more pending messages, inform eNB app */
if (mme_desc_p->s1ap_eNB_instance->s1ap_mme_pending_nb == 0) {
MessageDef *message_p;
message_p = itti_alloc_new_message(TASK_S1AP, S1AP_REGISTER_ENB_CNF);
S1AP_REGISTER_ENB_CNF(message_p).nb_mme = mme_desc_p->s1ap_eNB_instance->s1ap_mme_associated_nb;
itti_send_msg_to_task(TASK_ENB_APP, mme_desc_p->s1ap_eNB_instance->instance, message_p);
}
}
}
int s1ap_eNB_handle_message(uint32_t assoc_id, int32_t stream,
const uint8_t *const data, const uint32_t data_length) {
S1AP_S1AP_PDU_t pdu;
int ret;
DevAssert(data != NULL);
memset(&pdu, 0, sizeof(pdu));
if (s1ap_eNB_decode_pdu(&pdu, data, data_length) < 0) {
S1AP_ERROR("Failed to decode PDU\n");
return -1;
}
/* Checking procedure Code and direction of message */
if (pdu.choice.initiatingMessage.procedureCode > sizeof(messages_callback) / (3 * sizeof(
s1ap_message_decoded_callback))
|| (pdu.present > S1AP_S1AP_PDU_PR_unsuccessfulOutcome)) {
S1AP_ERROR("[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_S1AP_S1AP_PDU, &pdu);
return -1;
}
/* No handler present.
* This can mean not implemented or no procedure for eNB (wrong direction).
*/
if (messages_callback[pdu.choice.initiatingMessage.procedureCode][pdu.present - 1] == NULL) {
S1AP_ERROR("[SCTP %d] No handler for procedureCode %ld in %s\n",
assoc_id, pdu.choice.initiatingMessage.procedureCode,
s1ap_direction2String(pdu.present - 1));
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_S1AP_S1AP_PDU, &pdu);
return -1;
}
/* Calling the right handler */
ret = (*messages_callback[pdu.choice.initiatingMessage.procedureCode][pdu.present - 1])
(assoc_id, stream, &pdu);
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_S1AP_S1AP_PDU, &pdu);
return ret;
}
static
int s1ap_eNB_handle_s1_setup_failure(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu) {
S1AP_S1SetupFailure_t *container;
S1AP_S1SetupFailureIEs_t *ie;
s1ap_eNB_mme_data_t *mme_desc_p;
DevAssert(pdu != NULL);
container = &pdu->choice.unsuccessfulOutcome.value.choice.S1SetupFailure;
/* S1 Setup Failure == Non UE-related procedure -> stream 0 */
if (stream != 0) {
S1AP_WARN("[SCTP %d] Received s1 setup failure on stream != 0 (%d)\n",
assoc_id, stream);
}
if ((mme_desc_p = s1ap_eNB_get_MME(NULL, assoc_id, 0)) == NULL) {
S1AP_ERROR("[SCTP %d] Received S1 setup response for non existing "
"MME context\n", assoc_id);
return -1;
}
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_S1SetupFailureIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_Cause, true);
if ((ie->value.choice.Cause.present == S1AP_Cause_PR_misc) &&
(ie->value.choice.Cause.choice.misc == S1AP_CauseMisc_unspecified)) {
S1AP_WARN("Received s1 setup failure for MME... MME is not ready\n");
} else {
S1AP_ERROR("Received s1 setup failure for MME... please check your parameters\n");
}
mme_desc_p->state = S1AP_ENB_STATE_WAITING;
s1ap_handle_s1_setup_message(mme_desc_p, 0);
return 0;
}
static
int s1ap_eNB_handle_s1_setup_response(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu) {
S1AP_S1SetupResponse_t *container;
S1AP_S1SetupResponseIEs_t *ie;
s1ap_eNB_mme_data_t *mme_desc_p;
int i;
DevAssert(pdu != NULL);
container = &pdu->choice.successfulOutcome.value.choice.S1SetupResponse;
/* S1 Setup Response == Non UE-related procedure -> stream 0 */
if (stream != 0) {
S1AP_ERROR("[SCTP %d] Received s1 setup response on stream != 0 (%d)\n",
assoc_id, stream);
return -1;
}
if ((mme_desc_p = s1ap_eNB_get_MME(NULL, assoc_id, 0)) == NULL) {
S1AP_ERROR("[SCTP %d] Received S1 setup response for non existing "
"MME context\n", assoc_id);
return -1;
}
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_S1SetupResponseIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_ServedGUMMEIs, true);
/* The list of served gummei can contain at most 8 elements.
* LTE related gummei is the first element in the list, i.e with an id of 0.
*/
S1AP_DEBUG("servedGUMMEIs.list.count %d\n", ie->value.choice.ServedGUMMEIs.list.count);
DevAssert(ie->value.choice.ServedGUMMEIs.list.count > 0);
DevAssert(ie->value.choice.ServedGUMMEIs.list.count <= S1AP_maxnoofRATs);
for (i = 0; i < ie->value.choice.ServedGUMMEIs.list.count; i++) {
S1AP_ServedGUMMEIsItem_t *gummei_item_p;
struct served_gummei_s *new_gummei_p;
int j;
gummei_item_p = ie->value.choice.ServedGUMMEIs.list.array[i];
new_gummei_p = calloc(1, sizeof(struct served_gummei_s));
STAILQ_INIT(&new_gummei_p->served_plmns);
STAILQ_INIT(&new_gummei_p->served_group_ids);
STAILQ_INIT(&new_gummei_p->mme_codes);
S1AP_DEBUG("servedPLMNs.list.count %d\n", gummei_item_p->servedPLMNs.list.count);
for (j = 0; j < gummei_item_p->servedPLMNs.list.count; j++) {
S1AP_PLMNidentity_t *plmn_identity_p;
struct plmn_identity_s *new_plmn_identity_p;
plmn_identity_p = gummei_item_p->servedPLMNs.list.array[j];
new_plmn_identity_p = calloc(1, sizeof(struct plmn_identity_s));
TBCD_TO_MCC_MNC(plmn_identity_p, new_plmn_identity_p->mcc,
new_plmn_identity_p->mnc, new_plmn_identity_p->mnc_digit_length);
STAILQ_INSERT_TAIL(&new_gummei_p->served_plmns, new_plmn_identity_p, next);
new_gummei_p->nb_served_plmns++;
}
for (j = 0; j < gummei_item_p->servedGroupIDs.list.count; j++) {
S1AP_MME_Group_ID_t *mme_group_id_p;
struct served_group_id_s *new_group_id_p;
mme_group_id_p = gummei_item_p->servedGroupIDs.list.array[j];
new_group_id_p = calloc(1, sizeof(struct served_group_id_s));
OCTET_STRING_TO_INT16(mme_group_id_p, new_group_id_p->mme_group_id);
STAILQ_INSERT_TAIL(&new_gummei_p->served_group_ids, new_group_id_p, next);
new_gummei_p->nb_group_id++;
}
for (j = 0; j < gummei_item_p->servedMMECs.list.count; j++) {
S1AP_MME_Code_t *mme_code_p;
struct mme_code_s *new_mme_code_p;
mme_code_p = gummei_item_p->servedMMECs.list.array[j];
new_mme_code_p = calloc(1, sizeof(struct mme_code_s));
OCTET_STRING_TO_INT8(mme_code_p, new_mme_code_p->mme_code);
STAILQ_INSERT_TAIL(&new_gummei_p->mme_codes, new_mme_code_p, next);
new_gummei_p->nb_mme_code++;
}
STAILQ_INSERT_TAIL(&mme_desc_p->served_gummei, new_gummei_p, next);
}
/* Set the capacity of this MME */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_S1SetupResponseIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_RelativeMMECapacity, true);
mme_desc_p->relative_mme_capacity = ie->value.choice.RelativeMMECapacity;
/* Optionaly set the mme name */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_S1SetupResponseIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_MMEname, false);
if (ie) {
mme_desc_p->mme_name = calloc(ie->value.choice.MMEname.size + 1, sizeof(char));
memcpy(mme_desc_p->mme_name, ie->value.choice.MMEname.buf,
ie->value.choice.MMEname.size);
/* Convert the mme name to a printable string */
mme_desc_p->mme_name[ie->value.choice.MMEname.size] = '\0';
}
/* The association is now ready as eNB and MME know parameters of each other.
* Mark the association as UP to enable UE contexts creation.
*/
mme_desc_p->state = S1AP_ENB_STATE_CONNECTED;
mme_desc_p->s1ap_eNB_instance->s1ap_mme_associated_nb ++;
s1ap_handle_s1_setup_message(mme_desc_p, 0);
return 0;
}
static
int s1ap_eNB_handle_error_indication(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu) {
S1AP_ErrorIndication_t *container;
S1AP_ErrorIndicationIEs_t *ie;
s1ap_eNB_mme_data_t *mme_desc_p;
DevAssert(pdu != NULL);
container = &pdu->choice.initiatingMessage.value.choice.ErrorIndication;
/* S1 Setup Failure == Non UE-related procedure -> stream 0 */
if (stream != 0) {
S1AP_WARN("[SCTP %d] Received s1 Error indication on stream != 0 (%d)\n",
assoc_id, stream);
}
if ((mme_desc_p = s1ap_eNB_get_MME(NULL, assoc_id, 0)) == NULL) {
S1AP_ERROR("[SCTP %d] Received S1 Error indication for non existing "
"MME context\n", assoc_id);
return -1;
}
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_ErrorIndicationIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID, false);
/* optional */
if (!ie) {
S1AP_WARN("Received S1 Error indication MME UE S1AP ID 0x%lx\n", ie->value.choice.MME_UE_S1AP_ID);
}
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_ErrorIndicationIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID, false);
/* optional */
if (!ie) {
S1AP_WARN("Received S1 Error indication eNB UE S1AP ID 0x%lx\n", ie->value.choice.ENB_UE_S1AP_ID);
}
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_ErrorIndicationIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_Cause, false);
/* optional */
if (ie) {
switch(ie->value.choice.Cause.present) {
case S1AP_Cause_PR_NOTHING:
S1AP_WARN("Received S1 Error indication cause NOTHING\n");
break;
case S1AP_Cause_PR_radioNetwork:
switch (ie->value.choice.Cause.choice.radioNetwork) {
case S1AP_CauseRadioNetwork_unspecified:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_unspecified\n");
break;
case S1AP_CauseRadioNetwork_tx2relocoverall_expiry:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_tx2relocoverall_expiry\n");
break;
case S1AP_CauseRadioNetwork_successful_handover:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_successful_handover\n");
break;
case S1AP_CauseRadioNetwork_release_due_to_eutran_generated_reason:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_release_due_to_eutran_generated_reason\n");
break;
case S1AP_CauseRadioNetwork_handover_cancelled:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_handover_cancelled\n");
break;
case S1AP_CauseRadioNetwork_partial_handover:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_partial_handover\n");
break;
case S1AP_CauseRadioNetwork_ho_failure_in_target_EPC_eNB_or_target_system:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_ho_failure_in_target_EPC_eNB_or_target_system\n");
break;
case S1AP_CauseRadioNetwork_ho_target_not_allowed:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_ho_target_not_allowed\n");
break;
case S1AP_CauseRadioNetwork_tS1relocoverall_expiry:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_tS1relocoverall_expiry\n");
break;
case S1AP_CauseRadioNetwork_tS1relocprep_expiry:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_tS1relocprep_expiry\n");
break;
case S1AP_CauseRadioNetwork_cell_not_available:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_cell_not_available\n");
break;
case S1AP_CauseRadioNetwork_unknown_targetID:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_unknown_targetID\n");
break;
case S1AP_CauseRadioNetwork_no_radio_resources_available_in_target_cell:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_no_radio_resources_available_in_target_cell\n");
break;
case S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id\n");
break;
case S1AP_CauseRadioNetwork_unknown_enb_ue_s1ap_id:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_unknown_enb_ue_s1ap_id\n");
break;
case S1AP_CauseRadioNetwork_unknown_pair_ue_s1ap_id:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_unknown_pair_ue_s1ap_id\n");
break;
case S1AP_CauseRadioNetwork_handover_desirable_for_radio_reason:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_handover_desirable_for_radio_reason\n");
break;
case S1AP_CauseRadioNetwork_time_critical_handover:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_time_critical_handover\n");
break;
case S1AP_CauseRadioNetwork_resource_optimisation_handover:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_resource_optimisation_handover\n");
break;
case S1AP_CauseRadioNetwork_reduce_load_in_serving_cell:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_reduce_load_in_serving_cell\n");
break;
case S1AP_CauseRadioNetwork_user_inactivity:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_user_inactivity\n");
break;
case S1AP_CauseRadioNetwork_radio_connection_with_ue_lost:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_radio_connection_with_ue_lost\n");
break;
case S1AP_CauseRadioNetwork_load_balancing_tau_required:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_load_balancing_tau_required\n");
break;
case S1AP_CauseRadioNetwork_cs_fallback_triggered:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_cs_fallback_triggered\n");
break;
case S1AP_CauseRadioNetwork_ue_not_available_for_ps_service:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_ue_not_available_for_ps_service\n");
break;
case S1AP_CauseRadioNetwork_radio_resources_not_available:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_radio_resources_not_available\n");
break;
case S1AP_CauseRadioNetwork_failure_in_radio_interface_procedure:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_failure_in_radio_interface_procedure\n");
break;
case S1AP_CauseRadioNetwork_invalid_qos_combination:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_invals1ap_id_qos_combination\n");
break;
case S1AP_CauseRadioNetwork_interrat_redirection:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_interrat_redirection\n");
break;
case S1AP_CauseRadioNetwork_interaction_with_other_procedure:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_interaction_with_other_procedure\n");
break;
case S1AP_CauseRadioNetwork_unknown_E_RAB_ID:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_unknown_E_RAB_ID\n");
break;
case S1AP_CauseRadioNetwork_multiple_E_RAB_ID_instances:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_multiple_E_RAB_ID_instances\n");
break;
case S1AP_CauseRadioNetwork_encryption_and_or_integrity_protection_algorithms_not_supported:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_encryption_and_or_integrity_protection_algorithms_not_supported\n");
break;
case S1AP_CauseRadioNetwork_s1_intra_system_handover_triggered:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_s1_intra_system_handover_triggered\n");
break;
case S1AP_CauseRadioNetwork_s1_inter_system_handover_triggered:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_s1_inter_system_handover_triggered\n");
break;
case S1AP_CauseRadioNetwork_x2_handover_triggered:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_x2_handover_triggered\n");
break;
case S1AP_CauseRadioNetwork_redirection_towards_1xRTT:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_redirection_towards_1xRTT\n");
break;
case S1AP_CauseRadioNetwork_not_supported_QCI_value:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_not_supported_QCI_value\n");
break;
#if (S1AP_VERSION >= MAKE_VERSION(9, 0, 0))
case S1AP_CauseRadioNetwork_invalid_CSG_Id:
S1AP_WARN("Received S1 Error indication S1AP_CauseRadioNetwork_invals1ap_id_CSG_Id\n");
break;
#endif /* #if (S1AP_VERSION >= MAKE_VERSION(9, 0, 0)) */
default:
S1AP_WARN("Received S1 Error indication cause radio network case not handled\n");
}
break;
case S1AP_Cause_PR_transport:
switch (ie->value.choice.Cause.choice.transport) {
case S1AP_CauseTransport_transport_resource_unavailable:
S1AP_WARN("Received S1 Error indication S1AP_CauseTransport_transport_resource_unavailable\n");
break;
case S1AP_CauseTransport_unspecified:
S1AP_WARN("Received S1 Error indication S1AP_CauseTransport_unspecified\n");
break;
default:
S1AP_WARN("Received S1 Error indication cause transport case not handled\n");
}
break;
case S1AP_Cause_PR_nas:
switch (ie->value.choice.Cause.choice.nas) {
case S1AP_CauseNas_normal_release:
S1AP_WARN("Received S1 Error indication S1AP_CauseNas_normal_release\n");
break;
case S1AP_CauseNas_authentication_failure:
S1AP_WARN("Received S1 Error indication S1AP_CauseNas_authentication_failure\n");
break;
case S1AP_CauseNas_detach:
S1AP_WARN("Received S1 Error indication S1AP_CauseNas_detach\n");
break;
case S1AP_CauseNas_unspecified:
S1AP_WARN("Received S1 Error indication S1AP_CauseNas_unspecified\n");
break;
#if (S1AP_VERSION >= MAKE_VERSION(9, 0, 0))
case S1AP_CauseNas_csg_subscription_expiry:
S1AP_WARN("Received S1 Error indication S1AP_CauseNas_csg_subscription_expiry\n");
break;
#endif /* #if (S1AP_VERSION >= MAKE_VERSION(9, 0, 0)) */
default:
S1AP_WARN("Received S1 Error indication cause nas case not handled\n");
}
break;
case S1AP_Cause_PR_protocol:
switch (ie->value.choice.Cause.choice.protocol) {
case S1AP_CauseProtocol_transfer_syntax_error:
S1AP_WARN("Received S1 Error indication S1AP_CauseProtocol_transfer_syntax_error\n");
break;
case S1AP_CauseProtocol_abstract_syntax_error_reject:
S1AP_WARN("Received S1 Error indication S1AP_CauseProtocol_abstract_syntax_error_reject\n");
break;
case S1AP_CauseProtocol_abstract_syntax_error_ignore_and_notify:
S1AP_WARN("Received S1 Error indication S1AP_CauseProtocol_abstract_syntax_error_ignore_and_notify\n");
break;
case S1AP_CauseProtocol_message_not_compatible_with_receiver_state:
S1AP_WARN("Received S1 Error indication S1AP_CauseProtocol_message_not_compatible_with_receiver_state\n");
break;
case S1AP_CauseProtocol_semantic_error:
S1AP_WARN("Received S1 Error indication S1AP_CauseProtocol_semantic_error\n");
break;
case S1AP_CauseProtocol_abstract_syntax_error_falsely_constructed_message:
S1AP_WARN("Received S1 Error indication S1AP_CauseProtocol_abstract_syntax_error_falsely_constructed_message\n");
break;
case S1AP_CauseProtocol_unspecified:
S1AP_WARN("Received S1 Error indication S1AP_CauseProtocol_unspecified\n");
break;
default:
S1AP_WARN("Received S1 Error indication cause protocol case not handled\n");
}
break;
case S1AP_Cause_PR_misc:
switch (ie->value.choice.Cause.choice.protocol) {
case S1AP_CauseMisc_control_processing_overload:
S1AP_WARN("Received S1 Error indication S1AP_CauseMisc_control_processing_overload\n");
break;
case S1AP_CauseMisc_not_enough_user_plane_processing_resources:
S1AP_WARN("Received S1 Error indication S1AP_CauseMisc_not_enough_user_plane_processing_resources\n");
break;
case S1AP_CauseMisc_hardware_failure:
S1AP_WARN("Received S1 Error indication S1AP_CauseMisc_hardware_failure\n");
break;
case S1AP_CauseMisc_om_intervention:
S1AP_WARN("Received S1 Error indication S1AP_CauseMisc_om_intervention\n");
break;
case S1AP_CauseMisc_unspecified:
S1AP_WARN("Received S1 Error indication S1AP_CauseMisc_unspecified\n");
break;
case S1AP_CauseMisc_unknown_PLMN:
S1AP_WARN("Received S1 Error indication S1AP_CauseMisc_unknown_PLMN\n");
break;
default:
S1AP_WARN("Received S1 Error indication cause misc case not handled\n");
}
break;
}
}
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_ErrorIndicationIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_CriticalityDiagnostics, false);
if (ie) {
// TODO continue
}
// TODO continue
return 0;
}
static
int s1ap_eNB_handle_initial_context_request(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu) {
int i;
s1ap_eNB_mme_data_t *mme_desc_p = NULL;
s1ap_eNB_ue_context_t *ue_desc_p = NULL;
MessageDef *message_p = NULL;
S1AP_InitialContextSetupRequest_t *container;
S1AP_InitialContextSetupRequestIEs_t *ie;
S1AP_ENB_UE_S1AP_ID_t enb_ue_s1ap_id;
S1AP_MME_UE_S1AP_ID_t mme_ue_s1ap_id;
DevAssert(pdu != NULL);
container = &pdu->choice.initiatingMessage.value.choice.InitialContextSetupRequest;
if ((mme_desc_p = s1ap_eNB_get_MME(NULL, assoc_id, 0)) == NULL) {
S1AP_ERROR("[SCTP %d] Received initial context setup request for non "
"existing MME context\n", assoc_id);
return -1;
}
/* id-MME-UE-S1AP-ID */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_InitialContextSetupRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID, true);
mme_ue_s1ap_id = ie->value.choice.MME_UE_S1AP_ID;
/* id-eNB-UE-S1AP-ID */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_InitialContextSetupRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID, true);
enb_ue_s1ap_id = ie->value.choice.ENB_UE_S1AP_ID;
if ((ue_desc_p = s1ap_eNB_get_ue_context(mme_desc_p->s1ap_eNB_instance,
enb_ue_s1ap_id)) == NULL) {
S1AP_ERROR("[SCTP %d] Received initial context setup request for non "
"existing UE context 0x%06lx\n", assoc_id,
enb_ue_s1ap_id);
return -1;
}
/* Initial context request = UE-related procedure -> stream != 0 */
if (stream == 0) {
S1AP_ERROR("[SCTP %d] Received UE-related procedure on stream (%d)\n",
assoc_id, stream);
return -1;
}
ue_desc_p->rx_stream = stream;
ue_desc_p->mme_ue_s1ap_id = mme_ue_s1ap_id;
message_p = itti_alloc_new_message(TASK_S1AP, S1AP_INITIAL_CONTEXT_SETUP_REQ);
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).ue_initial_id = ue_desc_p->ue_initial_id;
ue_desc_p->ue_initial_id = 0;
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).eNB_ue_s1ap_id = ue_desc_p->eNB_ue_s1ap_id;
/* id-uEaggregateMaximumBitrate */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_InitialContextSetupRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_uEaggregateMaximumBitrate, true);
asn_INTEGER2ulong(&(ie->value.choice.UEAggregateMaximumBitrate.uEaggregateMaximumBitRateUL),
&(S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).ue_ambr.br_ul));
asn_INTEGER2ulong(&(ie->value.choice.UEAggregateMaximumBitrate.uEaggregateMaximumBitRateDL),
&(S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).ue_ambr.br_dl));
/* id-E-RABToBeSetupListCtxtSUReq */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_InitialContextSetupRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_E_RABToBeSetupListCtxtSUReq, true);
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).nb_of_e_rabs =
ie->value.choice.E_RABToBeSetupListCtxtSUReq.list.count;
for (i = 0; i < ie->value.choice.E_RABToBeSetupListCtxtSUReq.list.count; i++) {
S1AP_E_RABToBeSetupItemCtxtSUReq_t *item_p;
item_p = &(((S1AP_E_RABToBeSetupItemCtxtSUReqIEs_t *)ie->value.choice.E_RABToBeSetupListCtxtSUReq.list.array[i])->value.choice.E_RABToBeSetupItemCtxtSUReq);
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].e_rab_id = item_p->e_RAB_ID;
if (item_p->nAS_PDU != NULL) {
/* Only copy NAS pdu if present */
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].nas_pdu.length = item_p->nAS_PDU->size;
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].nas_pdu.buffer =
malloc(sizeof(uint8_t) * item_p->nAS_PDU->size);
memcpy(S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].nas_pdu.buffer,
item_p->nAS_PDU->buf, item_p->nAS_PDU->size);
S1AP_DEBUG("Received NAS message with the E_RAB setup procedure\n");
} else {
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].nas_pdu.length = 0;
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].nas_pdu.buffer = NULL;
}
/* Set the transport layer address */
memcpy(S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].sgw_addr.buffer,
item_p->transportLayerAddress.buf, item_p->transportLayerAddress.size);
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].sgw_addr.length =
item_p->transportLayerAddress.size * 8 - item_p->transportLayerAddress.bits_unused;
/* GTP tunnel endpoint ID */
OCTET_STRING_TO_INT32(&item_p->gTP_TEID, S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].gtp_teid);
/* Set the QOS informations */
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].qos.qci = item_p->e_RABlevelQoSParameters.qCI;
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].qos.allocation_retention_priority.priority_level =
item_p->e_RABlevelQoSParameters.allocationRetentionPriority.priorityLevel;
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].qos.allocation_retention_priority.pre_emp_capability =
item_p->e_RABlevelQoSParameters.allocationRetentionPriority.pre_emptionCapability;
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).e_rab_param[i].qos.allocation_retention_priority.pre_emp_vulnerability =
item_p->e_RABlevelQoSParameters.allocationRetentionPriority.pre_emptionVulnerability;
}
/* id-UESecurityCapabilities */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_InitialContextSetupRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_UESecurityCapabilities, true);
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).security_capabilities.encryption_algorithms =
BIT_STRING_to_uint16(&ie->value.choice.UESecurityCapabilities.encryptionAlgorithms);
S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).security_capabilities.integrity_algorithms =
BIT_STRING_to_uint16(&ie->value.choice.UESecurityCapabilities.integrityProtectionAlgorithms);
/* id-SecurityKey : Copy the security key */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_InitialContextSetupRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_SecurityKey, true);
memcpy(&S1AP_INITIAL_CONTEXT_SETUP_REQ(message_p).security_key,
ie->value.choice.SecurityKey.buf, ie->value.choice.SecurityKey.size);
itti_send_msg_to_task(TASK_RRC_ENB, ue_desc_p->eNB_instance->instance, message_p);
return 0;
}
static
int s1ap_eNB_handle_ue_context_release_command(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu) {
s1ap_eNB_mme_data_t *mme_desc_p = NULL;
s1ap_eNB_ue_context_t *ue_desc_p = NULL;
MessageDef *message_p = NULL;
S1AP_MME_UE_S1AP_ID_t mme_ue_s1ap_id;
S1AP_ENB_UE_S1AP_ID_t enb_ue_s1ap_id;
S1AP_UEContextReleaseCommand_t *container;
S1AP_UEContextReleaseCommand_IEs_t *ie;
DevAssert(pdu != NULL);
container = &pdu->choice.initiatingMessage.value.choice.UEContextReleaseCommand;
if ((mme_desc_p = s1ap_eNB_get_MME(NULL, assoc_id, 0)) == NULL) {
S1AP_ERROR("[SCTP %d] Received UE context release command for non "
"existing MME context\n", assoc_id);
return -1;
}
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_UEContextReleaseCommand_IEs_t, ie, container,
S1AP_ProtocolIE_ID_id_UE_S1AP_IDs, true);
switch (ie->value.choice.UE_S1AP_IDs.present) {
case S1AP_UE_S1AP_IDs_PR_uE_S1AP_ID_pair:
enb_ue_s1ap_id = ie->value.choice.UE_S1AP_IDs.choice.uE_S1AP_ID_pair.eNB_UE_S1AP_ID;
mme_ue_s1ap_id = ie->value.choice.UE_S1AP_IDs.choice.uE_S1AP_ID_pair.mME_UE_S1AP_ID;
MSC_LOG_RX_MESSAGE(
MSC_S1AP_ENB,
MSC_S1AP_MME,
NULL,0,
"0 UEContextRelease/%s eNB_ue_s1ap_id "S1AP_UE_ID_FMT" mme_ue_s1ap_id "S1AP_UE_ID_FMT" len %u",
s1ap_direction2String(pdu->present - 1),
enb_ue_s1ap_id,
mme_ue_s1ap_id);
if ((ue_desc_p = s1ap_eNB_get_ue_context(mme_desc_p->s1ap_eNB_instance,
enb_ue_s1ap_id)) == NULL) {
S1AP_ERROR("[SCTP %d] Received UE context release command for non "
"existing UE context 0x%06lx\n",
assoc_id,
enb_ue_s1ap_id);
return -1;
} else {
MSC_LOG_TX_MESSAGE(
MSC_S1AP_ENB,
MSC_RRC_ENB,
NULL,0,
"0 S1AP_UE_CONTEXT_RELEASE_COMMAND/%d eNB_ue_s1ap_id "S1AP_UE_ID_FMT" ",
enb_ue_s1ap_id);
message_p = itti_alloc_new_message(TASK_S1AP, S1AP_UE_CONTEXT_RELEASE_COMMAND);
if (ue_desc_p->mme_ue_s1ap_id == 0) { // case of Detach Request and switch off from RRC_IDLE mode
ue_desc_p->mme_ue_s1ap_id = mme_ue_s1ap_id;
}
S1AP_UE_CONTEXT_RELEASE_COMMAND(message_p).eNB_ue_s1ap_id = enb_ue_s1ap_id;
itti_send_msg_to_task(TASK_RRC_ENB, ue_desc_p->eNB_instance->instance, message_p);
return 0;
}
break;
//#warning "TODO mapping mme_ue_s1ap_id enb_ue_s1ap_id?"
case S1AP_UE_S1AP_IDs_PR_mME_UE_S1AP_ID:
mme_ue_s1ap_id = ie->value.choice.UE_S1AP_IDs.choice.uE_S1AP_ID_pair.mME_UE_S1AP_ID;
S1AP_ERROR("TO DO mapping mme_ue_s1ap_id enb_ue_s1ap_id");
(void)mme_ue_s1ap_id; /* TODO: remove - it's to remove gcc warning about unused var */
case S1AP_UE_S1AP_IDs_PR_NOTHING:
default:
S1AP_ERROR("S1AP_UE_CONTEXT_RELEASE_COMMAND not processed, missing info elements");
return -1;
}
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_UEContextReleaseCommand_IEs_t, ie, container,
S1AP_ProtocolIE_ID_id_Cause, true);
/* TBD */
}
static
int s1ap_eNB_handle_e_rab_setup_request(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu) {
int i;
S1AP_MME_UE_S1AP_ID_t mme_ue_s1ap_id;
S1AP_ENB_UE_S1AP_ID_t enb_ue_s1ap_id;
s1ap_eNB_mme_data_t *mme_desc_p = NULL;
s1ap_eNB_ue_context_t *ue_desc_p = NULL;
MessageDef *message_p = NULL;
S1AP_E_RABSetupRequest_t *container;
S1AP_E_RABSetupRequestIEs_t *ie;
DevAssert(pdu != NULL);
container = &pdu->choice.initiatingMessage.value.choice.E_RABSetupRequest;
if ((mme_desc_p = s1ap_eNB_get_MME(NULL, assoc_id, 0)) == NULL) {
S1AP_ERROR("[SCTP %d] Received initial context setup request for non "
"existing MME context\n", assoc_id);
return -1;
}
/* id-MME-UE-S1AP-ID */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_E_RABSetupRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID, true);
mme_ue_s1ap_id = ie->value.choice.MME_UE_S1AP_ID;
/* id-eNB-UE-S1AP-ID */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_E_RABSetupRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID, true);
enb_ue_s1ap_id = ie->value.choice.ENB_UE_S1AP_ID;
if ((ue_desc_p = s1ap_eNB_get_ue_context(mme_desc_p->s1ap_eNB_instance,
enb_ue_s1ap_id)) == NULL) {
S1AP_ERROR("[SCTP %d] Received initial context setup request for non "
"existing UE context 0x%06lx\n", assoc_id,
enb_ue_s1ap_id);
return -1;
}
/* Initial context request = UE-related procedure -> stream != 0 */
if (stream == 0) {
S1AP_ERROR("[SCTP %d] Received UE-related procedure on stream (%d)\n",
assoc_id, stream);
return -1;
}
ue_desc_p->rx_stream = stream;
if ( ue_desc_p->mme_ue_s1ap_id != mme_ue_s1ap_id) {
S1AP_WARN("UE context mme_ue_s1ap_id is different form that of the message (%d != %ld)",
ue_desc_p->mme_ue_s1ap_id, mme_ue_s1ap_id);
}
message_p = itti_alloc_new_message(TASK_S1AP, S1AP_E_RAB_SETUP_REQ);
S1AP_E_RAB_SETUP_REQ(message_p).ue_initial_id = ue_desc_p->ue_initial_id;
S1AP_E_RAB_SETUP_REQ(message_p).mme_ue_s1ap_id = mme_ue_s1ap_id;
S1AP_E_RAB_SETUP_REQ(message_p).eNB_ue_s1ap_id = enb_ue_s1ap_id;
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_E_RABSetupRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_E_RABToBeSetupListBearerSUReq, true);
S1AP_E_RAB_SETUP_REQ(message_p).nb_e_rabs_tosetup =
ie->value.choice.E_RABToBeSetupListBearerSUReq.list.count;
for (i = 0; i < ie->value.choice.E_RABToBeSetupListBearerSUReq.list.count; i++) {
S1AP_E_RABToBeSetupItemBearerSUReq_t *item_p;
item_p = &(((S1AP_E_RABToBeSetupItemBearerSUReqIEs_t *)ie->value.choice.E_RABToBeSetupListBearerSUReq.list.array[i])->value.choice.E_RABToBeSetupItemBearerSUReq);
S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].e_rab_id = item_p->e_RAB_ID;
// check for the NAS PDU
if (item_p->nAS_PDU.size > 0 ) {
S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].nas_pdu.length = item_p->nAS_PDU.size;
S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].nas_pdu.buffer = malloc(sizeof(uint8_t) * item_p->nAS_PDU.size);
memcpy(S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].nas_pdu.buffer,
item_p->nAS_PDU.buf, item_p->nAS_PDU.size);
// S1AP_INFO("received a NAS PDU with size %d (%02x.%02x)\n",S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].nas_pdu.length, item_p->nAS_PDU.buf[0], item_p->nAS_PDU.buf[1]);
} else {
S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].nas_pdu.length = 0;
S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].nas_pdu.buffer = NULL;
S1AP_WARN("NAS PDU is not provided, generate a E_RAB_SETUP Failure (TBD) back to MME \n");
// return -1;
}
/* Set the transport layer address */
memcpy(S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].sgw_addr.buffer,
item_p->transportLayerAddress.buf, item_p->transportLayerAddress.size);
S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].sgw_addr.length =
item_p->transportLayerAddress.size * 8 - item_p->transportLayerAddress.bits_unused;
/* S1AP_INFO("sgw addr %s len: %d (size %d, index %d)\n",
S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].sgw_addr.buffer,
S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].sgw_addr.length,
item_p->transportLayerAddress.size, i);
*/
/* GTP tunnel endpoint ID */
OCTET_STRING_TO_INT32(&item_p->gTP_TEID, S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].gtp_teid);
/* Set the QOS informations */
S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].qos.qci = item_p->e_RABlevelQoSParameters.qCI;
S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].qos.allocation_retention_priority.priority_level =
item_p->e_RABlevelQoSParameters.allocationRetentionPriority.priorityLevel;
S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].qos.allocation_retention_priority.pre_emp_capability =
item_p->e_RABlevelQoSParameters.allocationRetentionPriority.pre_emptionCapability;
S1AP_E_RAB_SETUP_REQ(message_p).e_rab_setup_params[i].qos.allocation_retention_priority.pre_emp_vulnerability =
item_p->e_RABlevelQoSParameters.allocationRetentionPriority.pre_emptionVulnerability;
}
itti_send_msg_to_task(TASK_RRC_ENB, ue_desc_p->eNB_instance->instance, message_p);
return 0;
}
static
int s1ap_eNB_handle_paging(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu) {
s1ap_eNB_mme_data_t *mme_desc_p = NULL;
s1ap_eNB_instance_t *s1ap_eNB_instance = NULL;
MessageDef *message_p = NULL;
S1AP_Paging_t *container;
S1AP_PagingIEs_t *ie;
DevAssert(pdu != NULL);
container = &pdu->choice.initiatingMessage.value.choice.Paging;
// received Paging Message from MME
S1AP_DEBUG("[SCTP %d] Received Paging Message From MME\n",assoc_id);
/* Paging procedure -> stream != 0 */
if (stream == 0) {
LOG_W(S1AP,"[SCTP %d] Received Paging procedure on stream (%d)\n",
assoc_id, stream);
return -1;
}
if ((mme_desc_p = s1ap_eNB_get_MME(NULL, assoc_id, 0)) == NULL) {
S1AP_ERROR("[SCTP %d] Received Paging for non "
"existing MME context\n", assoc_id);
return -1;
}
s1ap_eNB_instance = mme_desc_p->s1ap_eNB_instance;
if (s1ap_eNB_instance == NULL) {
S1AP_ERROR("[SCTP %d] Received Paging for non existing MME context : s1ap_eNB_instance is NULL\n",
assoc_id);
return -1;
}
message_p = itti_alloc_new_message(TASK_S1AP, S1AP_PAGING_IND);
/* convert S1AP_PagingIEs_t to s1ap_paging_ind_t */
/* id-UEIdentityIndexValue : convert UE Identity Index value */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_PagingIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_UEIdentityIndexValue, true);
S1AP_PAGING_IND(message_p).ue_index_value = BIT_STRING_to_uint32(&ie->value.choice.UEIdentityIndexValue);
S1AP_DEBUG("[SCTP %d] Received Paging ue_index_value (%d)\n",
assoc_id,(uint32_t)S1AP_PAGING_IND(message_p).ue_index_value);
S1AP_PAGING_IND(message_p).ue_paging_identity.choice.s_tmsi.mme_code = 0;
S1AP_PAGING_IND(message_p).ue_paging_identity.choice.s_tmsi.m_tmsi = 0;
/* id-UEPagingID */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_PagingIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_UEPagingID, true);
/* convert UE Paging Identity */
if (ie->value.choice.UEPagingID.present == S1AP_UEPagingID_PR_s_TMSI) {
S1AP_PAGING_IND(message_p).ue_paging_identity.presenceMask = UE_PAGING_IDENTITY_s_tmsi;
OCTET_STRING_TO_INT8(&ie->value.choice.UEPagingID.choice.s_TMSI.mMEC, S1AP_PAGING_IND(message_p).ue_paging_identity.choice.s_tmsi.mme_code);
OCTET_STRING_TO_INT32(&ie->value.choice.UEPagingID.choice.s_TMSI.m_TMSI, S1AP_PAGING_IND(message_p).ue_paging_identity.choice.s_tmsi.m_tmsi);
} else if (ie->value.choice.UEPagingID.present == S1AP_UEPagingID_PR_iMSI) {
S1AP_PAGING_IND(message_p).ue_paging_identity.presenceMask = UE_PAGING_IDENTITY_imsi;
S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.length = 0;
for (int i = 0; i < ie->value.choice.UEPagingID.choice.iMSI.size; i++) {
S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.buffer[2*i] = (uint8_t)(ie->value.choice.UEPagingID.choice.iMSI.buf[i] & 0x0F );
S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.length++;
S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.buffer[2*i+1] = (uint8_t)((ie->value.choice.UEPagingID.choice.iMSI.buf[i]>>4) & 0x0F);
LOG_D(S1AP,"paging : i %d %d imsi %d %d \n",2*i,2*i+1,S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.buffer[2*i], S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.buffer[2*i+1]);
if (S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.buffer[2*i+1] == 0x0F) {
if(i != ie->value.choice.UEPagingID.choice.iMSI.size - 1) {
/* invalid paging_p->uePagingID.choise.iMSI.buffer */
S1AP_ERROR("[SCTP %d] Received Paging : uePagingID.choise.iMSI error(i %d 0x0F)\n", assoc_id,i);
return -1;
}
} else {
S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.length++;
}
}
if (S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.length >= S1AP_IMSI_LENGTH) {
/* invalid paging_p->uePagingID.choise.iMSI.size */
S1AP_ERROR("[SCTP %d] Received Paging : uePagingID.choise.iMSI.size(%d) is over IMSI length(%d)\n", assoc_id, S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.length, S1AP_IMSI_LENGTH);
return -1;
}
} else {
/* invalid paging_p->uePagingID.present */
S1AP_ERROR("[SCTP %d] Received Paging : uePagingID.present(%d) is unknown\n", assoc_id, ie->value.choice.UEPagingID.present);
return -1;
}
S1AP_PAGING_IND(message_p).paging_drx = PAGING_DRX_256;
/* id-pagingDRX */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_PagingIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_pagingDRX, false);
/* optional */
if (ie) {
S1AP_PAGING_IND(message_p).paging_drx = ie->value.choice.PagingDRX;
} else {
S1AP_PAGING_IND(message_p).paging_drx = PAGING_DRX_256;
}
/* */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_PagingIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_CNDomain, true);
/* id-CNDomain : convert cnDomain */
if (ie->value.choice.CNDomain == S1AP_CNDomain_ps) {
S1AP_PAGING_IND(message_p).cn_domain = CN_DOMAIN_PS;
} else if (ie->value.choice.CNDomain == S1AP_CNDomain_cs) {
S1AP_PAGING_IND(message_p).cn_domain = CN_DOMAIN_CS;
} else {
/* invalid paging_p->cnDomain */
S1AP_ERROR("[SCTP %d] Received Paging : cnDomain(%ld) is unknown\n", assoc_id, ie->value.choice.CNDomain);
return -1;
}
memset (&S1AP_PAGING_IND(message_p).plmn_identity[0], 0, sizeof(plmn_identity_t)*256);
memset (&S1AP_PAGING_IND(message_p).tac[0], 0, sizeof(int16_t)*256);
S1AP_PAGING_IND(message_p).tai_size = 0;
/* id-TAIList */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_PagingIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_TAIList, true);
S1AP_INFO("[SCTP %d] Received Paging taiList: count %d\n", assoc_id, ie->value.choice.TAIList.list.count);
for (int i = 0; i < ie->value.choice.TAIList.list.count; i++) {
S1AP_TAIItem_t *item_p;
item_p = &(((S1AP_TAIItemIEs_t *)ie->value.choice.TAIList.list.array[i])->value.choice.TAIItem);
TBCD_TO_MCC_MNC(&(item_p->tAI.pLMNidentity), S1AP_PAGING_IND(message_p).plmn_identity[i].mcc,
S1AP_PAGING_IND(message_p).plmn_identity[i].mnc,
S1AP_PAGING_IND(message_p).plmn_identity[i].mnc_digit_length);
OCTET_STRING_TO_INT16(&(item_p->tAI.tAC), S1AP_PAGING_IND(message_p).tac[i]);
S1AP_PAGING_IND(message_p).tai_size++;
S1AP_DEBUG("[SCTP %d] Received Paging: MCC %d, MNC %d, TAC %d\n", assoc_id,
S1AP_PAGING_IND(message_p).plmn_identity[i].mcc,
S1AP_PAGING_IND(message_p).plmn_identity[i].mnc,
S1AP_PAGING_IND(message_p).tac[i]);
}
//paging parameter values
S1AP_DEBUG("[SCTP %d] Received Paging parameters: ue_index_value %d cn_domain %d paging_drx %d paging_priority %d\n",assoc_id,
S1AP_PAGING_IND(message_p).ue_index_value, S1AP_PAGING_IND(message_p).cn_domain,
S1AP_PAGING_IND(message_p).paging_drx, S1AP_PAGING_IND(message_p).paging_priority);
S1AP_DEBUG("[SCTP %d] Received Paging parameters(ue): presenceMask %d s_tmsi.m_tmsi %d s_tmsi.mme_code %d IMSI length %d (0-5) %d%d%d%d%d%d\n",assoc_id,
S1AP_PAGING_IND(message_p).ue_paging_identity.presenceMask, S1AP_PAGING_IND(message_p).ue_paging_identity.choice.s_tmsi.m_tmsi,
S1AP_PAGING_IND(message_p).ue_paging_identity.choice.s_tmsi.mme_code, S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.length,
S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.buffer[0], S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.buffer[1],
S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.buffer[2], S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.buffer[3],
S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.buffer[4], S1AP_PAGING_IND(message_p).ue_paging_identity.choice.imsi.buffer[5]);
/* send message to RRC */
itti_send_msg_to_task(TASK_RRC_ENB, s1ap_eNB_instance->instance, message_p);
return 0;
}
static
int s1ap_eNB_handle_e_rab_modify_request(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu) {
int i, nb_of_e_rabs_failed;
s1ap_eNB_mme_data_t *mme_desc_p = NULL;
s1ap_eNB_ue_context_t *ue_desc_p = NULL;
MessageDef *message_p = NULL;
S1AP_E_RABModifyRequest_t *container;
S1AP_E_RABModifyRequestIEs_t *ie;
S1AP_ENB_UE_S1AP_ID_t enb_ue_s1ap_id;
S1AP_MME_UE_S1AP_ID_t mme_ue_s1ap_id;
DevAssert(pdu != NULL);
container = &pdu->choice.initiatingMessage.value.choice.E_RABModifyRequest;
if ((mme_desc_p = s1ap_eNB_get_MME(NULL, assoc_id, 0)) == NULL) {
S1AP_ERROR("[SCTP %d] Received E-RAB modify request for non "
"existing MME context\n", assoc_id);
return -1;
}
/* id-MME-UE-S1AP-ID */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_E_RABModifyRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID, true);
mme_ue_s1ap_id = ie->value.choice.MME_UE_S1AP_ID;
/* id-eNB-UE-S1AP-ID */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_E_RABModifyRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID, true);
enb_ue_s1ap_id = ie->value.choice.ENB_UE_S1AP_ID;
if ((ue_desc_p = s1ap_eNB_get_ue_context(mme_desc_p->s1ap_eNB_instance,
enb_ue_s1ap_id)) == NULL) {
S1AP_ERROR("[SCTP %d] Received E-RAB modify request for non "
"existing UE context 0x%06lx\n", assoc_id,
enb_ue_s1ap_id);
return -1;
}
/* E-RAB modify request = UE-related procedure -> stream != 0 */
if (stream == 0) {
S1AP_ERROR("[SCTP %d] Received UE-related procedure on stream (%d)\n",
assoc_id, stream);
return -1;
}
ue_desc_p->rx_stream = stream;
if (ue_desc_p->mme_ue_s1ap_id != mme_ue_s1ap_id) {
S1AP_WARN("UE context mme_ue_s1ap_id is different form that of the message (%d != %ld)",
ue_desc_p->mme_ue_s1ap_id, mme_ue_s1ap_id);
message_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_E_RAB_MODIFY_RESP);
S1AP_E_RAB_MODIFY_RESP (message_p).eNB_ue_s1ap_id = enb_ue_s1ap_id;
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_E_RABModifyRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_E_RABToBeModifiedListBearerModReq, true);
for(nb_of_e_rabs_failed = 0; nb_of_e_rabs_failed < ie->value.choice.E_RABToBeModifiedListBearerModReq.list.count; nb_of_e_rabs_failed++) {
S1AP_E_RABToBeModifiedItemBearerModReq_t *item_p;
item_p = &(((S1AP_E_RABToBeModifiedItemBearerModReqIEs_t *)
ie->value.choice.E_RABToBeModifiedListBearerModReq.list.array[nb_of_e_rabs_failed])->value.choice.E_RABToBeModifiedItemBearerModReq);
S1AP_E_RAB_MODIFY_RESP(message_p).e_rabs_failed[nb_of_e_rabs_failed].e_rab_id = item_p->e_RAB_ID;
S1AP_E_RAB_MODIFY_RESP(message_p).e_rabs_failed[nb_of_e_rabs_failed].cause = S1AP_Cause_PR_radioNetwork;
S1AP_E_RAB_MODIFY_RESP(message_p).e_rabs_failed[nb_of_e_rabs_failed].cause_value = S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id;
}
S1AP_E_RAB_MODIFY_RESP(message_p).nb_of_e_rabs_failed = nb_of_e_rabs_failed;
s1ap_eNB_e_rab_modify_resp(mme_desc_p->s1ap_eNB_instance->instance,
&S1AP_E_RAB_MODIFY_RESP(message_p));
message_p = NULL;
return -1;
}
message_p = itti_alloc_new_message(TASK_S1AP, S1AP_E_RAB_MODIFY_REQ);
S1AP_E_RAB_MODIFY_REQ(message_p).ue_initial_id = ue_desc_p->ue_initial_id;
S1AP_E_RAB_MODIFY_REQ(message_p).mme_ue_s1ap_id = mme_ue_s1ap_id;
S1AP_E_RAB_MODIFY_REQ(message_p).eNB_ue_s1ap_id = enb_ue_s1ap_id;
/* id-E-RABToBeModifiedListBearerModReq */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_E_RABModifyRequestIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_E_RABToBeModifiedListBearerModReq, true);
S1AP_E_RAB_MODIFY_REQ(message_p).nb_e_rabs_tomodify =
ie->value.choice.E_RABToBeModifiedListBearerModReq.list.count;
for (i = 0; i < ie->value.choice.E_RABToBeModifiedListBearerModReq.list.count; i++) {
S1AP_E_RABToBeModifiedItemBearerModReq_t *item_p;
item_p = &(((S1AP_E_RABToBeModifiedItemBearerModReqIEs_t *)ie->value.choice.E_RABToBeModifiedListBearerModReq.list.array[i])->value.choice.E_RABToBeModifiedItemBearerModReq);
S1AP_E_RAB_MODIFY_REQ(message_p).e_rab_modify_params[i].e_rab_id = item_p->e_RAB_ID;
// check for the NAS PDU
if (item_p->nAS_PDU.size > 0 ) {
S1AP_E_RAB_MODIFY_REQ(message_p).e_rab_modify_params[i].nas_pdu.length = item_p->nAS_PDU.size;
S1AP_E_RAB_MODIFY_REQ(message_p).e_rab_modify_params[i].nas_pdu.buffer = malloc(sizeof(uint8_t) * item_p->nAS_PDU.size);
memcpy(S1AP_E_RAB_MODIFY_REQ(message_p).e_rab_modify_params[i].nas_pdu.buffer,
item_p->nAS_PDU.buf, item_p->nAS_PDU.size);
} else {
S1AP_E_RAB_MODIFY_REQ(message_p).e_rab_modify_params[i].nas_pdu.length = 0;
S1AP_E_RAB_MODIFY_REQ(message_p).e_rab_modify_params[i].nas_pdu.buffer = NULL;
continue;
}
/* Set the QOS informations */
S1AP_E_RAB_MODIFY_REQ(message_p).e_rab_modify_params[i].qos.qci = item_p->e_RABLevelQoSParameters.qCI;
S1AP_E_RAB_MODIFY_REQ(message_p).e_rab_modify_params[i].qos.allocation_retention_priority.priority_level =
item_p->e_RABLevelQoSParameters.allocationRetentionPriority.priorityLevel;
S1AP_E_RAB_MODIFY_REQ(message_p).e_rab_modify_params[i].qos.allocation_retention_priority.pre_emp_capability =
item_p->e_RABLevelQoSParameters.allocationRetentionPriority.pre_emptionCapability;
S1AP_E_RAB_MODIFY_REQ(message_p).e_rab_modify_params[i].qos.allocation_retention_priority.pre_emp_vulnerability =
item_p->e_RABLevelQoSParameters.allocationRetentionPriority.pre_emptionVulnerability;
}
itti_send_msg_to_task(TASK_RRC_ENB, ue_desc_p->eNB_instance->instance, message_p);
return 0;
}
// handle e-rab release command and send it to rrc_end
static
int s1ap_eNB_handle_e_rab_release_command(uint32_t assoc_id,
uint32_t stream,
S1AP_S1AP_PDU_t *pdu) {
int i;
s1ap_eNB_mme_data_t *mme_desc_p = NULL;
s1ap_eNB_ue_context_t *ue_desc_p = NULL;
MessageDef *message_p = NULL;
S1AP_E_RABReleaseCommand_t *container;
S1AP_E_RABReleaseCommandIEs_t *ie;
S1AP_ENB_UE_S1AP_ID_t enb_ue_s1ap_id;
S1AP_MME_UE_S1AP_ID_t mme_ue_s1ap_id;
DevAssert(pdu != NULL);
container = &pdu->choice.initiatingMessage.value.choice.E_RABReleaseCommand;
if ((mme_desc_p = s1ap_eNB_get_MME(NULL, assoc_id, 0)) == NULL) {
S1AP_ERROR("[SCTP %d] Received E-RAB release command for non existing MME context\n", assoc_id);
return -1;
}
/* id-MME-UE-S1AP-ID */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_E_RABReleaseCommandIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID, true);
mme_ue_s1ap_id = ie->value.choice.MME_UE_S1AP_ID;
/* id-eNB-UE-S1AP-ID */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_E_RABReleaseCommandIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID, true);
enb_ue_s1ap_id = ie->value.choice.ENB_UE_S1AP_ID;
if ((ue_desc_p = s1ap_eNB_get_ue_context(mme_desc_p->s1ap_eNB_instance,
enb_ue_s1ap_id)) == NULL) {
S1AP_ERROR("[SCTP %d] Received E-RAB release command for non existing UE context 0x%06lx\n", assoc_id,
ie->value.choice.ENB_UE_S1AP_ID);
return -1;
}
/* Initial context request = UE-related procedure -> stream != 0 */
if (stream == 0) {
S1AP_ERROR("[SCTP %d] Received UE-related procedure on stream (%d)\n",
assoc_id, stream);
return -1;
}
ue_desc_p->rx_stream = stream;
if (ue_desc_p->mme_ue_s1ap_id != mme_ue_s1ap_id) {
S1AP_WARN("UE context mme_ue_s1ap_id is different form that of the message (%d != %ld)",
ue_desc_p->mme_ue_s1ap_id, mme_ue_s1ap_id);
}
S1AP_DEBUG("[SCTP %d] Received E-RAB release command for eNB_UE_S1AP_ID %ld mme_ue_s1ap_id %ld\n",
assoc_id, enb_ue_s1ap_id, mme_ue_s1ap_id);
message_p = itti_alloc_new_message(TASK_S1AP, S1AP_E_RAB_RELEASE_COMMAND);
S1AP_E_RAB_RELEASE_COMMAND(message_p).eNB_ue_s1ap_id = enb_ue_s1ap_id;
S1AP_E_RAB_RELEASE_COMMAND(message_p).mme_ue_s1ap_id = mme_ue_s1ap_id;
/* id-NAS-PDU */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_E_RABReleaseCommandIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_NAS_PDU, false);
if(ie && ie->value.choice.NAS_PDU.size > 0) {
S1AP_E_RAB_RELEASE_COMMAND(message_p).nas_pdu.length = ie->value.choice.NAS_PDU.size;
S1AP_E_RAB_RELEASE_COMMAND(message_p).nas_pdu.buffer =
malloc(sizeof(uint8_t) * ie->value.choice.NAS_PDU.size);
memcpy(S1AP_E_RAB_RELEASE_COMMAND(message_p).nas_pdu.buffer,
ie->value.choice.NAS_PDU.buf,
ie->value.choice.NAS_PDU.size);
} else {
S1AP_E_RAB_RELEASE_COMMAND(message_p).nas_pdu.length = 0;
S1AP_E_RAB_RELEASE_COMMAND(message_p).nas_pdu.buffer = NULL;
}
/* id-E-RABToBeReleasedList */
S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_E_RABReleaseCommandIEs_t, ie, container,
S1AP_ProtocolIE_ID_id_E_RABToBeReleasedList, true);
S1AP_E_RAB_RELEASE_COMMAND(message_p).nb_e_rabs_torelease = ie->value.choice.E_RABList.list.count;
for (i = 0; i < ie->value.choice.E_RABList.list.count; i++) {
S1AP_E_RABItem_t *item_p;
item_p = &(((S1AP_E_RABItemIEs_t *)ie->value.choice.E_RABList.list.array[i])->value.choice.E_RABItem);
S1AP_E_RAB_RELEASE_COMMAND(message_p).e_rab_release_params[i].e_rab_id = item_p->e_RAB_ID;
S1AP_DEBUG("[SCTP] Received E-RAB release command for e-rab id %ld\n", item_p->e_RAB_ID);
}
itti_send_msg_to_task(TASK_RRC_ENB, ue_desc_p->eNB_instance->instance, message_p);
return 0;
}