242 lines
8.8 KiB
C
242 lines
8.8 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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/*! \file s1ap_eNB_context_management_procedures.c
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* \brief S1AP context management procedures
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* \author S. Roux and Navid Nikaein
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* \date 2010 - 2015
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* \email: navid.nikaein@eurecom.fr
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* \version 1.0
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* @ingroup _s1ap
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include "assertions.h"
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#include "conversions.h"
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#include "intertask_interface.h"
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#include "s1ap_common.h"
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#include "s1ap_eNB_defs.h"
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#include "s1ap_eNB_itti_messaging.h"
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#include "s1ap_ies_defs.h"
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#include "s1ap_eNB_encoder.h"
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#include "s1ap_eNB_nnsf.h"
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#include "s1ap_eNB_ue_context.h"
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#include "s1ap_eNB_nas_procedures.h"
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#include "s1ap_eNB_management_procedures.h"
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#include "s1ap_eNB_context_management_procedures.h"
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#include "msc.h"
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int s1ap_ue_context_release_complete(instance_t instance,
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s1ap_ue_release_complete_t *ue_release_complete_p)
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{
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s1ap_eNB_instance_t *s1ap_eNB_instance_p = NULL;
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struct s1ap_eNB_ue_context_s *ue_context_p = NULL;
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S1ap_UEContextReleaseCompleteIEs_t *ue_ctxt_release_complete_ies_p = NULL;
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s1ap_message message;
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uint8_t *buffer;
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uint32_t length;
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int ret = -1;
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/* Retrieve the S1AP eNB instance associated with Mod_id */
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s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance);
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DevAssert(ue_release_complete_p != NULL);
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DevAssert(s1ap_eNB_instance_p != NULL);
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/*RB_FOREACH(ue_context_p, s1ap_ue_map, &s1ap_eNB_instance_p->s1ap_ue_head) {
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S1AP_WARN("in s1ap_ue_map: UE context eNB_ue_s1ap_id %u mme_ue_s1ap_id %u state %u\n",
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ue_context_p->eNB_ue_s1ap_id, ue_context_p->mme_ue_s1ap_id,
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ue_context_p->ue_state);
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}*/
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if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p,
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ue_release_complete_p->eNB_ue_s1ap_id)) == NULL) {
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/* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
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S1AP_WARN("Failed to find ue context associated with eNB ue s1ap id: %u\n",
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ue_release_complete_p->eNB_ue_s1ap_id);
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return -1;
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}
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/* Prepare the S1AP message to encode */
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memset(&message, 0, sizeof(s1ap_message));
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message.direction = S1AP_PDU_PR_successfulOutcome;
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message.procedureCode = S1ap_ProcedureCode_id_UEContextRelease;
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//message.criticality = S1ap_Criticality_reject;
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ue_ctxt_release_complete_ies_p = &message.msg.s1ap_UEContextReleaseCompleteIEs;
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ue_ctxt_release_complete_ies_p->eNB_UE_S1AP_ID = ue_release_complete_p->eNB_ue_s1ap_id;
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ue_ctxt_release_complete_ies_p->mme_ue_s1ap_id = ue_context_p->mme_ue_s1ap_id;
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//ue_ctxt_release_complete_ies_p->criticalityDiagnostics
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//ue_ctxt_release_complete_ies_p->presenceMask
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if (s1ap_eNB_encode_pdu(&message, &buffer, &length) < 0) {
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/* Encode procedure has failed... */
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S1AP_ERROR("Failed to encode UE context release complete\n");
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return -1;
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}
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MSC_LOG_TX_MESSAGE(
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MSC_S1AP_ENB,
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MSC_S1AP_MME,
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buffer,
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length,
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MSC_AS_TIME_FMT" UEContextRelease successfulOutcome eNB_ue_s1ap_id %u mme_ue_s1ap_id %u",
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0,0, //MSC_AS_TIME_ARGS(ctxt_pP),
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ue_ctxt_release_complete_ies_p->eNB_UE_S1AP_ID,
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ue_ctxt_release_complete_ies_p->mme_ue_s1ap_id);
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/* UE associated signalling -> use the allocated stream */
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s1ap_eNB_itti_send_sctp_data_req(s1ap_eNB_instance_p->instance,
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ue_context_p->mme_ref->assoc_id, buffer,
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length, ue_context_p->tx_stream);
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//LG s1ap_eNB_itti_send_sctp_close_association(s1ap_eNB_instance_p->instance,
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// ue_context_p->mme_ref->assoc_id);
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// release UE context
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struct s1ap_eNB_ue_context_s *ue_context2_p = NULL;
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if ((ue_context2_p = RB_REMOVE(s1ap_ue_map, &s1ap_eNB_instance_p->s1ap_ue_head, ue_context_p))
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!= NULL) {
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S1AP_WARN("Removed UE context eNB_ue_s1ap_id %u\n",
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ue_context2_p->eNB_ue_s1ap_id);
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s1ap_eNB_free_ue_context(ue_context2_p);
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} else {
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S1AP_WARN("Removing UE context eNB_ue_s1ap_id %u: did not find context\n",
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ue_context_p->eNB_ue_s1ap_id);
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}
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/*RB_FOREACH(ue_context_p, s1ap_ue_map, &s1ap_eNB_instance_p->s1ap_ue_head) {
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S1AP_WARN("in s1ap_ue_map: UE context eNB_ue_s1ap_id %u mme_ue_s1ap_id %u state %u\n",
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ue_context_p->eNB_ue_s1ap_id, ue_context_p->mme_ue_s1ap_id,
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ue_context_p->ue_state);
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}*/
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return ret;
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}
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int s1ap_ue_context_release_req(instance_t instance,
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s1ap_ue_release_req_t *ue_release_req_p)
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{
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s1ap_eNB_instance_t *s1ap_eNB_instance_p = NULL;
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struct s1ap_eNB_ue_context_s *ue_context_p = NULL;
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S1ap_UEContextReleaseRequestIEs_t *ue_ctxt_release_request_ies_p = NULL;
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s1ap_message message;
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uint8_t *buffer = NULL;
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uint32_t length;
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/* Retrieve the S1AP eNB instance associated with Mod_id */
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s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance);
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DevAssert(ue_release_req_p != NULL);
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DevAssert(s1ap_eNB_instance_p != NULL);
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if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p,
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ue_release_req_p->eNB_ue_s1ap_id)) == NULL) {
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/* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
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S1AP_WARN("Failed to find ue context associated with eNB ue s1ap id: %u\n",
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ue_release_req_p->eNB_ue_s1ap_id);
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return -1;
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}
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/* Prepare the S1AP message to encode */
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memset(&message, 0, sizeof(s1ap_message));
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message.direction = S1AP_PDU_PR_initiatingMessage;
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message.procedureCode = S1ap_ProcedureCode_id_UEContextReleaseRequest;
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//message.criticality = S1ap_Criticality_reject;
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ue_ctxt_release_request_ies_p = &message.msg.s1ap_UEContextReleaseRequestIEs;
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ue_ctxt_release_request_ies_p->eNB_UE_S1AP_ID = ue_release_req_p->eNB_ue_s1ap_id;
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ue_ctxt_release_request_ies_p->mme_ue_s1ap_id = ue_context_p->mme_ue_s1ap_id;
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switch (ue_release_req_p->cause) {
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case S1AP_CAUSE_NOTHING:
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ue_ctxt_release_request_ies_p->cause.present = S1ap_Cause_PR_NOTHING;
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break;
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case S1AP_CAUSE_RADIO_NETWORK:
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ue_ctxt_release_request_ies_p->cause.present = S1ap_Cause_PR_radioNetwork;
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ue_ctxt_release_request_ies_p->cause.choice.radioNetwork = ue_release_req_p->cause_value;
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break;
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case S1AP_CAUSE_TRANSPORT:
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ue_ctxt_release_request_ies_p->cause.present = S1ap_Cause_PR_transport;
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ue_ctxt_release_request_ies_p->cause.choice.transport = ue_release_req_p->cause_value;
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break;
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case S1AP_CAUSE_NAS:
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ue_ctxt_release_request_ies_p->cause.present = S1ap_Cause_PR_nas;
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ue_ctxt_release_request_ies_p->cause.choice.nas = ue_release_req_p->cause_value;
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break;
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case S1AP_CAUSE_PROTOCOL:
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ue_ctxt_release_request_ies_p->cause.present = S1ap_Cause_PR_protocol;
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ue_ctxt_release_request_ies_p->cause.choice.protocol = ue_release_req_p->cause_value;
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break;
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case S1AP_CAUSE_MISC:
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default:
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ue_ctxt_release_request_ies_p->cause.present = S1ap_Cause_PR_misc;
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ue_ctxt_release_request_ies_p->cause.choice.misc = ue_release_req_p->cause_value;
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break;
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}
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if (s1ap_eNB_encode_pdu(&message, &buffer, &length) < 0) {
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/* Encode procedure has failed... */
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S1AP_ERROR("Failed to encode UE context release complete\n");
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return -1;
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}
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MSC_LOG_TX_MESSAGE(
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MSC_S1AP_ENB,
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MSC_S1AP_MME,
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buffer,
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length,
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MSC_AS_TIME_FMT" UEContextReleaseRequest initiatingMessage eNB_ue_s1ap_id %u mme_ue_s1ap_id %u",
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0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
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ue_ctxt_release_request_ies_p->eNB_UE_S1AP_ID,
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ue_ctxt_release_request_ies_p->mme_ue_s1ap_id);
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/* UE associated signalling -> use the allocated stream */
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s1ap_eNB_itti_send_sctp_data_req(s1ap_eNB_instance_p->instance,
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ue_context_p->mme_ref->assoc_id, buffer,
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length, ue_context_p->tx_stream);
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return 0;
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}
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