/* * 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 ngap_gNB_context_management_procedures.c * \brief NGAP context management procedures * \author Yoshio INOUE, Masayuki HARADA * \date 2020 * \email: yoshio.inoue@fujitsu.com,masayuki.harada@fujitsu.com (yoshio.inoue%40fujitsu.com%2cmasayuki.harada%40fujitsu.com) * \version 1.0 * @ingroup _ngap */ #include #include #include #include "assertions.h" #include "conversions.h" #include "intertask_interface.h" #include "ngap_common.h" #include "ngap_gNB_defs.h" #include "ngap_gNB_itti_messaging.h" #include "ngap_gNB_encoder.h" #include "ngap_gNB_nnsf.h" #include "ngap_gNB_ue_context.h" #include "ngap_gNB_nas_procedures.h" #include "ngap_gNB_management_procedures.h" #include "ngap_gNB_context_management_procedures.h" #include "NGAP_PDUSessionResourceItemCxtRelReq.h" #include "msc.h" int ngap_ue_context_release_complete(instance_t instance, ngap_ue_release_complete_t *ue_release_complete_p) { ngap_gNB_instance_t *ngap_gNB_instance_p = NULL; struct ngap_gNB_ue_context_s *ue_context_p = NULL; NGAP_NGAP_PDU_t pdu; NGAP_UEContextReleaseComplete_t *out; NGAP_UEContextReleaseComplete_IEs_t *ie; uint8_t *buffer; uint32_t length; /* Retrieve the NGAP gNB instance associated with Mod_id */ ngap_gNB_instance_p = ngap_gNB_get_instance(instance); DevAssert(ue_release_complete_p != NULL); DevAssert(ngap_gNB_instance_p != NULL); /*RB_FOREACH(ue_context_p, ngap_ue_map, &ngap_gNB_instance_p->ngap_ue_head) { NGAP_WARN("in ngap_ue_map: UE context gNB_ue_ngap_id %u amf_ue_ngap_id %u state %u\n", ue_context_p->gNB_ue_ngap_id, ue_context_p->amf_ue_ngap_id, ue_context_p->ue_state); }*/ if ((ue_context_p = ngap_gNB_get_ue_context(ngap_gNB_instance_p, ue_release_complete_p->gNB_ue_ngap_id)) == NULL) { /* The context for this gNB ue ngap id doesn't exist in the map of gNB UEs */ NGAP_WARN("Failed to find ue context associated with gNB ue ngap id: %u\n", ue_release_complete_p->gNB_ue_ngap_id); return -1; } /* Prepare the NGAP message to encode */ memset(&pdu, 0, sizeof(pdu)); pdu.present = NGAP_NGAP_PDU_PR_successfulOutcome; pdu.choice.successfulOutcome = CALLOC(1, sizeof(struct NGAP_SuccessfulOutcome)); pdu.choice.successfulOutcome->procedureCode = NGAP_ProcedureCode_id_UEContextRelease; pdu.choice.successfulOutcome->criticality = NGAP_Criticality_reject; pdu.choice.successfulOutcome->value.present = NGAP_SuccessfulOutcome__value_PR_UEContextReleaseComplete; out = &pdu.choice.successfulOutcome->value.choice.UEContextReleaseComplete; /* mandatory */ ie = (NGAP_UEContextReleaseComplete_IEs_t *)calloc(1, sizeof(NGAP_UEContextReleaseComplete_IEs_t)); ie->id = NGAP_ProtocolIE_ID_id_AMF_UE_NGAP_ID; ie->criticality = NGAP_Criticality_ignore; ie->value.present = NGAP_UEContextReleaseComplete_IEs__value_PR_AMF_UE_NGAP_ID; asn_uint642INTEGER(&ie->value.choice.AMF_UE_NGAP_ID, ue_context_p->amf_ue_ngap_id); ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie); /* mandatory */ ie = (NGAP_UEContextReleaseComplete_IEs_t *)calloc(1, sizeof(NGAP_UEContextReleaseComplete_IEs_t)); ie->id = NGAP_ProtocolIE_ID_id_RAN_UE_NGAP_ID; ie->criticality = NGAP_Criticality_ignore; ie->value.present = NGAP_UEContextReleaseComplete_IEs__value_PR_RAN_UE_NGAP_ID; ie->value.choice.RAN_UE_NGAP_ID = ue_release_complete_p->gNB_ue_ngap_id; ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie); if (ngap_gNB_encode_pdu(&pdu, &buffer, &length) < 0) { /* Encode procedure has failed... */ NGAP_ERROR("Failed to encode UE context release complete\n"); return -1; } MSC_LOG_TX_MESSAGE( MSC_NGAP_GNB, MSC_NGAP_AMF, buffer, length, MSC_AS_TIME_FMT" UEContextRelease successfulOutcome gNB_ue_ngap_id %u amf_ue_ngap_id %lu", 0,0, //MSC_AS_TIME_ARGS(ctxt_pP), ue_release_complete_p->gNB_ue_ngap_id, ue_context_p->amf_ue_ngap_id); /* UE associated signalling -> use the allocated stream */ ngap_gNB_itti_send_sctp_data_req(ngap_gNB_instance_p->instance, ue_context_p->amf_ref->assoc_id, buffer, length, ue_context_p->tx_stream); //LG ngap_gNB_itti_send_sctp_close_association(ngap_gNB_instance_p->instance, // ue_context_p->amf_ref->assoc_id); // release UE context struct ngap_gNB_ue_context_s *ue_context2_p = NULL; if ((ue_context2_p = RB_REMOVE(ngap_ue_map, &ngap_gNB_instance_p->ngap_ue_head, ue_context_p)) != NULL) { NGAP_WARN("Removed UE context gNB_ue_ngap_id %u\n", ue_context2_p->gNB_ue_ngap_id); ngap_gNB_free_ue_context(ue_context2_p); } else { NGAP_WARN("Removing UE context gNB_ue_ngap_id %u: did not find context\n", ue_context_p->gNB_ue_ngap_id); } /*RB_FOREACH(ue_context_p, ngap_ue_map, &ngap_gNB_instance_p->ngap_ue_head) { NGAP_WARN("in ngap_ue_map: UE context gNB_ue_ngap_id %u amf_ue_ngap_id %u state %u\n", ue_context_p->gNB_ue_ngap_id, ue_context_p->amf_ue_ngap_id, ue_context_p->ue_state); }*/ return 0; } int ngap_ue_context_release_req(instance_t instance, ngap_ue_release_req_t *ue_release_req_p) { ngap_gNB_instance_t *ngap_gNB_instance_p = NULL; struct ngap_gNB_ue_context_s *ue_context_p = NULL; NGAP_NGAP_PDU_t pdu; NGAP_UEContextReleaseRequest_t *out; NGAP_UEContextReleaseRequest_IEs_t *ie; uint8_t *buffer = NULL; uint32_t length; /* Retrieve the NGAP gNB instance associated with Mod_id */ ngap_gNB_instance_p = ngap_gNB_get_instance(instance); DevAssert(ue_release_req_p != NULL); DevAssert(ngap_gNB_instance_p != NULL); if ((ue_context_p = ngap_gNB_get_ue_context(ngap_gNB_instance_p, ue_release_req_p->gNB_ue_ngap_id)) == NULL) { /* The context for this gNB ue ngap id doesn't exist in the map of gNB UEs */ NGAP_WARN("Failed to find ue context associated with gNB ue ngap id: %u\n", ue_release_req_p->gNB_ue_ngap_id); return -1; } /* Prepare the NGAP message to encode */ memset(&pdu, 0, sizeof(pdu)); pdu.present = NGAP_NGAP_PDU_PR_initiatingMessage; pdu.choice.initiatingMessage = CALLOC(1, sizeof(struct NGAP_InitiatingMessage)); pdu.choice.initiatingMessage->procedureCode = NGAP_ProcedureCode_id_UEContextReleaseRequest; pdu.choice.initiatingMessage->criticality = NGAP_Criticality_ignore; pdu.choice.initiatingMessage->value.present = NGAP_InitiatingMessage__value_PR_UEContextReleaseRequest; out = &pdu.choice.initiatingMessage->value.choice.UEContextReleaseRequest; /* mandatory */ ie = (NGAP_UEContextReleaseRequest_IEs_t *)calloc(1, sizeof(NGAP_UEContextReleaseRequest_IEs_t)); ie->id = NGAP_ProtocolIE_ID_id_AMF_UE_NGAP_ID; ie->criticality = NGAP_Criticality_reject; ie->value.present = NGAP_UEContextReleaseRequest_IEs__value_PR_AMF_UE_NGAP_ID; asn_uint642INTEGER(&ie->value.choice.AMF_UE_NGAP_ID, ue_context_p->amf_ue_ngap_id); ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie); /* mandatory */ ie = (NGAP_UEContextReleaseRequest_IEs_t *)calloc(1, sizeof(NGAP_UEContextReleaseRequest_IEs_t)); ie->id = NGAP_ProtocolIE_ID_id_RAN_UE_NGAP_ID; ie->criticality = NGAP_Criticality_reject; ie->value.present = NGAP_UEContextReleaseRequest_IEs__value_PR_RAN_UE_NGAP_ID; ie->value.choice.RAN_UE_NGAP_ID = ue_release_req_p->gNB_ue_ngap_id; ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie); /* optional */ if (ue_release_req_p->nb_of_pdusessions > 0) { ie = (NGAP_UEContextReleaseRequest_IEs_t *)calloc(1, sizeof(NGAP_UEContextReleaseRequest_IEs_t)); ie->id = NGAP_ProtocolIE_ID_id_PDUSessionResourceListCxtRelReq; ie->criticality = NGAP_Criticality_reject; ie->value.present = NGAP_UEContextReleaseRequest_IEs__value_PR_PDUSessionResourceListCxtRelReq; for (int i = 0; i < ue_release_req_p->nb_of_pdusessions; i++) { NGAP_PDUSessionResourceItemCxtRelReq_t *item; item = (NGAP_PDUSessionResourceItemCxtRelReq_t *)calloc(1,sizeof(NGAP_PDUSessionResourceItemCxtRelReq_t)); item->pDUSessionID = ue_release_req_p->pdusessions[i].pdusession_id; ASN_SEQUENCE_ADD(&ie->value.choice.PDUSessionResourceListCxtRelReq.list, item); } ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie); } /* mandatory */ ie = (NGAP_UEContextReleaseRequest_IEs_t *)calloc(1, sizeof(NGAP_UEContextReleaseRequest_IEs_t)); ie->id = NGAP_ProtocolIE_ID_id_Cause; ie->criticality = NGAP_Criticality_ignore; ie->value.present = NGAP_UEContextReleaseRequest_IEs__value_PR_Cause; switch (ue_release_req_p->cause) { case NGAP_Cause_PR_radioNetwork: ie->value.choice.Cause.present = NGAP_Cause_PR_radioNetwork; ie->value.choice.Cause.choice.radioNetwork = ue_release_req_p->cause_value; break; case NGAP_Cause_PR_transport: ie->value.choice.Cause.present = NGAP_Cause_PR_transport; ie->value.choice.Cause.choice.transport = ue_release_req_p->cause_value; break; case NGAP_Cause_PR_nas: ie->value.choice.Cause.present = NGAP_Cause_PR_nas; ie->value.choice.Cause.choice.nas = ue_release_req_p->cause_value; break; case NGAP_Cause_PR_protocol: ie->value.choice.Cause.present = NGAP_Cause_PR_protocol; ie->value.choice.Cause.choice.protocol = ue_release_req_p->cause_value; break; case NGAP_Cause_PR_misc: ie->value.choice.Cause.present = NGAP_Cause_PR_misc; ie->value.choice.Cause.choice.misc = ue_release_req_p->cause_value; break; case NGAP_Cause_PR_NOTHING: default: ie->value.choice.Cause.present = NGAP_Cause_PR_NOTHING; break; } ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie); if (ngap_gNB_encode_pdu(&pdu, &buffer, &length) < 0) { /* Encode procedure has failed... */ NGAP_ERROR("Failed to encode UE context release complete\n"); return -1; } MSC_LOG_TX_MESSAGE( MSC_NGAP_GNB, MSC_NGAP_AMF, buffer, length, MSC_AS_TIME_FMT" UEContextReleaseRequest initiatingMessage gNB_ue_ngap_id %u amf_ue_ngap_id %lu", 0,0,//MSC_AS_TIME_ARGS(ctxt_pP), ue_release_req_p->gNB_ue_ngap_id, ue_context_p->amf_ue_ngap_id); /* UE associated signalling -> use the allocated stream */ ngap_gNB_itti_send_sctp_data_req(ngap_gNB_instance_p->instance, ue_context_p->amf_ref->assoc_id, buffer, length, ue_context_p->tx_stream); return 0; }