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openairinterface5g/openair2/F1AP/f1ap_du_ue_context_management.c
T
Robert Schmidt abb3eff285 Use F1 UE context Release Complete in stack 
Use the new type and remove the old one.
2025-06-28 12:19:58 +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 f1ap_du_ue_context_management.c
* \brief F1AP UE Context Management, DU side
* \author EURECOM/NTUST
* \date 2018
* \version 0.1
* \company Eurecom
* \email: navid.nikaein@eurecom.fr, bing-kai.hong@eurecom.fr
* \note
* \warning
*/
#include "f1ap_common.h"
#include "f1ap_encoder.h"
#include "f1ap_itti_messaging.h"
#include "f1ap_du_ue_context_management.h"
#include "lib/f1ap_ue_context.h"
#include "openair2/LAYER2/NR_MAC_gNB/mac_rrc_dl_handler.h"
#include "openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h"
#include "openair2/LAYER2/nr_pdcp/nr_pdcp_oai_api.h"
int DU_handle_UE_CONTEXT_SETUP_REQUEST(instance_t instance, sctp_assoc_t assoc_id, uint32_t stream, F1AP_F1AP_PDU_t *pdu)
{
f1ap_ue_context_setup_req_t req = {0};
if (!decode_ue_context_setup_req(pdu, &req)) {
LOG_E(F1AP, "cannot decode F1 UE Context Setup Request\n");
free_ue_context_setup_req(&req);
return -1;
}
ue_context_setup_request(&req);
free_ue_context_setup_req(&req);
return 0;
}
int DU_send_UE_CONTEXT_SETUP_RESPONSE(sctp_assoc_t assoc_id, f1ap_ue_context_setup_resp_t *resp)
{
F1AP_F1AP_PDU_t *pdu = encode_ue_context_setup_resp(resp);
uint8_t *buffer = NULL;
uint32_t len = 0;
if (f1ap_encode_pdu(pdu, &buffer, &len) < 0) {
LOG_E(F1AP, "Failed to encode F1 UE CONTEXT SETUP RESPONSE\n");
return -1;
}
f1ap_itti_send_sctp_data_req(assoc_id, buffer, len);
ASN_STRUCT_FREE(asn_DEF_F1AP_F1AP_PDU, pdu);
return 0;
}
int DU_send_UE_CONTEXT_SETUP_FAILURE(sctp_assoc_t assoc_id)
{
AssertFatal(1==0,"Not implemented yet\n");
}
int DU_send_UE_CONTEXT_RELEASE_REQUEST(sctp_assoc_t assoc_id, f1ap_ue_context_rel_req_t *req)
{
F1AP_F1AP_PDU_t *pdu = encode_ue_context_rel_req(req);
uint8_t *buffer = NULL;
uint32_t len = 0;
if (f1ap_encode_pdu(pdu, &buffer, &len) < 0) {
LOG_E(F1AP, "Failed to encode F1 context release request\n");
return -1;
}
f1ap_itti_send_sctp_data_req(assoc_id, buffer, len);
ASN_STRUCT_FREE(asn_DEF_F1AP_F1AP_PDU, pdu);
return 0;
}
int DU_handle_UE_CONTEXT_RELEASE_COMMAND(instance_t instance, sctp_assoc_t assoc_id, uint32_t stream, F1AP_F1AP_PDU_t *pdu)
{
f1ap_ue_context_rel_cmd_t cmd = {0};
if (!decode_ue_context_rel_cmd(pdu, &cmd)) {
LOG_E(F1AP, "cannot decode F1 UE Context Release Command\n");
free_ue_context_rel_cmd(&cmd);
return -1;
}
ue_context_release_command(&cmd);
free_ue_context_rel_cmd(&cmd);
return 0;
}
int DU_send_UE_CONTEXT_RELEASE_COMPLETE(sctp_assoc_t assoc_id, f1ap_ue_context_rel_cplt_t *cplt)
{
F1AP_F1AP_PDU_t *pdu = encode_ue_context_rel_cplt(cplt);
uint8_t *buffer;
uint32_t len;
if (f1ap_encode_pdu(pdu, &buffer, &len) < 0) {
LOG_E(F1AP, "Failed to encode F1 context release complete\n");
return -1;
}
f1ap_itti_send_sctp_data_req(assoc_id, buffer, len);
ASN_STRUCT_FREE(asn_DEF_F1AP_F1AP_PDU, pdu);
return 0;
}
int DU_handle_UE_CONTEXT_MODIFICATION_REQUEST(instance_t instance, sctp_assoc_t assoc_id, uint32_t stream, F1AP_F1AP_PDU_t *pdu)
{
f1ap_ue_context_mod_req_t req = {0};
if (!decode_ue_context_mod_req(pdu, &req)) {
LOG_E(F1AP, "cannot decode F1 UE Context Modification Request\n");
free_ue_context_mod_req(&req);
return -1;
}
ue_context_modification_request(&req);
free_ue_context_mod_req(&req);
return 0;
}
int DU_send_UE_CONTEXT_MODIFICATION_RESPONSE(sctp_assoc_t assoc_id, f1ap_ue_context_mod_resp_t *resp)
{
F1AP_F1AP_PDU_t *pdu = encode_ue_context_mod_resp(resp);
uint8_t *buffer = NULL;
uint32_t len = 0;
if (f1ap_encode_pdu(pdu, &buffer, &len) < 0) {
LOG_E(F1AP, "Failed to encode F1 UE CONTEXT SETUP RESPONSE\n");
return -1;
}
f1ap_itti_send_sctp_data_req(assoc_id, buffer, len);
ASN_STRUCT_FREE(asn_DEF_F1AP_F1AP_PDU, pdu);
return 0;
}
int DU_send_UE_CONTEXT_MODIFICATION_FAILURE(sctp_assoc_t assoc_id) {
AssertFatal(1==0,"Not implemented yet\n");
}
int DU_send_UE_CONTEXT_MODIFICATION_REQUIRED(sctp_assoc_t assoc_id, f1ap_ue_context_modif_required_t *required)
{
/* 0. Message Type */
F1AP_F1AP_PDU_t pdu = {0};
pdu.present = F1AP_F1AP_PDU_PR_initiatingMessage;
asn1cCalloc(pdu.choice.initiatingMessage, tmp);
tmp->procedureCode = F1AP_ProcedureCode_id_UEContextModificationRequired;
tmp->criticality = F1AP_Criticality_reject;
tmp->value.present = F1AP_InitiatingMessage__value_PR_UEContextModificationRequired;
F1AP_UEContextModificationRequired_t *out = &tmp->value.choice.UEContextModificationRequired;
/* mandatory GNB_CU_UE_F1AP_ID */
asn1cSequenceAdd(out->protocolIEs.list, F1AP_UEContextModificationRequiredIEs_t, ie1);
ie1->id = F1AP_ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID;
ie1->criticality = F1AP_Criticality_reject;
ie1->value.present = F1AP_UEContextModificationRequiredIEs__value_PR_GNB_CU_UE_F1AP_ID;
ie1->value.choice.GNB_CU_UE_F1AP_ID = required->gNB_CU_ue_id;
/* mandatory: GNB_DU_UE_F1AP_ID */
asn1cSequenceAdd(out->protocolIEs.list, F1AP_UEContextModificationRequiredIEs_t, ie2);
ie2->id = F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID;
ie2->criticality = F1AP_Criticality_reject;
ie2->value.present = F1AP_UEContextModificationRequiredIEs__value_PR_GNB_DU_UE_F1AP_ID;
ie2->value.choice.GNB_DU_UE_F1AP_ID = required->gNB_DU_ue_id;
/* optional: Resource Coordination Transfer Container */
/* not implemented!*/
/* optional: DU-to-CU RRC Container */
if (required->du_to_cu_rrc_information) {
asn1cSequenceAdd(out->protocolIEs.list, F1AP_UEContextModificationRequiredIEs_t, ie3);
ie3->id = F1AP_ProtocolIE_ID_id_DUtoCURRCInformation;
ie3->criticality = F1AP_Criticality_reject;
ie3->value.present = F1AP_UEContextModificationRequiredIEs__value_PR_DUtoCURRCInformation;
const du_to_cu_rrc_information_t *du2cu = required->du_to_cu_rrc_information;
AssertFatal(du2cu->cellGroupConfig != NULL, "du2cu cellGroupConfig is mandatory!\n");
/* mandatorycellGroupConfig */
OCTET_STRING_fromBuf(&ie3->value.choice.DUtoCURRCInformation.cellGroupConfig,
(const char *)du2cu->cellGroupConfig,
du2cu->cellGroupConfig_length);
/* optional: measGapConfig */
if (du2cu->measGapConfig != NULL) {
OCTET_STRING_fromBuf(ie3->value.choice.DUtoCURRCInformation.measGapConfig,
(const char *)du2cu->measGapConfig,
du2cu->measGapConfig_length);
}
/* optional: requestedP_MaxFR1 */
if (du2cu->requestedP_MaxFR1 != NULL) {
OCTET_STRING_fromBuf(ie3->value.choice.DUtoCURRCInformation.requestedP_MaxFR1,
(const char *)du2cu->requestedP_MaxFR1,
du2cu->requestedP_MaxFR1_length);
}
}
/* optional: DRB required to be modified */
/* not implemented */
/* optional: SRB required to be released */
/* not implemented */
/* optional: DRB required to be released */
/* not implemented */
/* mandatory: cause */
asn1cSequenceAdd(out->protocolIEs.list, F1AP_UEContextModificationRequiredIEs_t, ie4);
ie4->id = F1AP_ProtocolIE_ID_id_Cause;
ie4->criticality = F1AP_Criticality_reject;
ie4->value.present = F1AP_UEContextModificationRequiredIEs__value_PR_Cause;
F1AP_Cause_t *cause = &ie4->value.choice.Cause;
switch (required->cause) {
case F1AP_CAUSE_RADIO_NETWORK:
cause->present = F1AP_Cause_PR_radioNetwork;
cause->choice.radioNetwork = required->cause_value;
break;
case F1AP_CAUSE_TRANSPORT:
cause->present = F1AP_Cause_PR_transport;
cause->choice.transport = required->cause_value;
break;
case F1AP_CAUSE_PROTOCOL:
cause->present = F1AP_Cause_PR_protocol;
cause->choice.protocol = required->cause_value;
break;
case F1AP_CAUSE_MISC:
cause->present = F1AP_Cause_PR_misc;
cause->choice.misc = required->cause_value;
break;
case F1AP_CAUSE_NOTHING:
default:
cause->present = F1AP_Cause_PR_NOTHING;
break;
} // switch
/* optional: BH RLC Channel Required to be Released List */
/* not implemented */
/* optional: SL DRB Required to Be Modified List */
/* not implemented */
/* optional: SL DRB Required to be Released List */
/* not implemented */
/* optional: Candidate Cells To Be Cancelled List */
/* not implemented */
/* encode */
uint8_t *buffer = NULL;
uint32_t len = 0;
if (f1ap_encode_pdu(&pdu, &buffer, &len) < 0) {
LOG_E(F1AP, "Failed to encode F1 context release request\n");
return -1;
}
f1ap_itti_send_sctp_data_req(assoc_id, buffer, len);
return 0;
}
int DU_handle_UE_CONTEXT_MODIFICATION_CONFIRM(instance_t instance, sctp_assoc_t assoc_id, uint32_t stream, F1AP_F1AP_PDU_t *pdu)
{
F1AP_UEContextModificationConfirm_t *container = &pdu->choice.successfulOutcome->value.choice.UEContextModificationConfirm;
f1ap_ue_context_modif_confirm_t confirm = {0};
F1AP_UEContextModificationConfirmIEs_t *ie = NULL;
/* mandatory: GNB_CU_UE_F1AP_ID */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationConfirmIEs_t, ie, container, F1AP_ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID, true);
confirm.gNB_CU_ue_id = ie->value.choice.GNB_CU_UE_F1AP_ID;
/* mandatory: GNB_DU_UE_F1AP_ID */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationConfirmIEs_t, ie, container, F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID, true);
confirm.gNB_DU_ue_id = ie->value.choice.GNB_DU_UE_F1AP_ID;
/* optional: Resource Coordination Transfer Container */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationConfirmIEs_t,
ie,
container,
F1AP_ProtocolIE_ID_id_ResourceCoordinationTransferContainer,
false);
AssertFatal(ie == NULL, "handling of Resource Coordination Transfer Container not implemented\n");
/* optional: DRBS Modified List */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationConfirmIEs_t,
ie,
container,
F1AP_ProtocolIE_ID_id_DRBs_Modified_List,
false);
AssertFatal(ie == NULL, "handling of DRBs Modified List not implemented\n");
/* optional: RRC Container */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationConfirmIEs_t, ie, container, F1AP_ProtocolIE_ID_id_RRCContainer, false);
if (ie != NULL) {
F1AP_RRCContainer_t *rrc_container = &ie->value.choice.RRCContainer;
confirm.rrc_container = malloc(rrc_container->size);
AssertFatal(confirm.rrc_container != NULL, "memory allocation failed\n");
memcpy(confirm.rrc_container, rrc_container->buf, rrc_container->size);
confirm.rrc_container_length = rrc_container->size;
}
/* optional: Criticality Diagnostics */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationConfirmIEs_t,
ie,
container,
F1AP_ProtocolIE_ID_id_CriticalityDiagnostics,
false);
AssertFatal(ie == NULL, "handling of DRBs Modified List not implemented\n");
/* optional: Execute Duplication */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationConfirmIEs_t,
ie,
container,
F1AP_ProtocolIE_ID_id_ExecuteDuplication,
false);
AssertFatal(ie == NULL, "handling of DRBs Modified List not implemented\n");
/* optional: Resource Coordination Transfer Information */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationConfirmIEs_t,
ie,
container,
F1AP_ProtocolIE_ID_id_ResourceCoordinationTransferInformation,
false);
AssertFatal(ie == NULL, "handling of DRBs Modified List not implemented\n");
/* optional: SL DRB Modified List */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationConfirmIEs_t,
ie,
container,
F1AP_ProtocolIE_ID_id_SLDRBs_Modified_List,
false);
AssertFatal(ie == NULL, "handling of DRBs Modified List not implemented\n");
ue_context_modification_confirm(&confirm);
return 0;
}
int DU_handle_UE_CONTEXT_MODIFICATION_REFUSE(instance_t instance, sctp_assoc_t assoc_id, uint32_t stream, F1AP_F1AP_PDU_t *pdu)
{
F1AP_UEContextModificationRefuse_t *container = &pdu->choice.unsuccessfulOutcome->value.choice.UEContextModificationRefuse;
f1ap_ue_context_modif_refuse_t refuse = {0};
F1AP_UEContextModificationRefuseIEs_t *ie = NULL;
/* mandatory: GNB_CU_UE_F1AP_ID */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationRefuseIEs_t, ie, container, F1AP_ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID, true);
refuse.gNB_CU_ue_id = ie->value.choice.GNB_CU_UE_F1AP_ID;
/* mandatory: GNB_DU_UE_F1AP_ID */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationRefuseIEs_t, ie, container, F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID, true);
refuse.gNB_DU_ue_id = ie->value.choice.GNB_DU_UE_F1AP_ID;
/* mandatory: Cause */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationRefuseIEs_t, ie, container, F1AP_ProtocolIE_ID_id_Cause, true);
switch (ie->value.choice.Cause.present) {
case F1AP_Cause_PR_radioNetwork:
refuse.cause = F1AP_CAUSE_RADIO_NETWORK;
refuse.cause_value = ie->value.choice.Cause.choice.radioNetwork;
break;
case F1AP_Cause_PR_transport:
refuse.cause = F1AP_CAUSE_TRANSPORT;
refuse.cause_value = ie->value.choice.Cause.choice.transport;
break;
case F1AP_Cause_PR_protocol:
refuse.cause = F1AP_CAUSE_PROTOCOL;
refuse.cause_value = ie->value.choice.Cause.choice.protocol;
break;
case F1AP_Cause_PR_misc:
refuse.cause = F1AP_CAUSE_MISC;
refuse.cause_value = ie->value.choice.Cause.choice.misc;
break;
default:
LOG_W(F1AP, "Unknown cause for UE Context Modification Refuse message\n");
/* fall through */
case F1AP_Cause_PR_NOTHING:
refuse.cause = F1AP_CAUSE_NOTHING;
break;
}
/* optional: Criticality Diagnostics */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextModificationRefuseIEs_t,
ie,
container,
F1AP_ProtocolIE_ID_id_CriticalityDiagnostics,
false);
AssertFatal(ie == NULL, "handling of DRBs Modified List not implemented\n");
ue_context_modification_refuse(&refuse);
return 0;
}
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