246 lines
9.8 KiB
C
246 lines
9.8 KiB
C
/*
|
|
* 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_context_management_procedures.c
|
|
* \brief S1AP context management procedures
|
|
* \author S. Roux and Navid Nikaein
|
|
* \date 2010 - 2015
|
|
* \email: navid.nikaein@eurecom.fr
|
|
* \version 1.0
|
|
* @ingroup _s1ap
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
|
|
#include "assertions.h"
|
|
#include "conversions.h"
|
|
|
|
#include "intertask_interface.h"
|
|
|
|
#include "s1ap_common.h"
|
|
#include "s1ap_eNB_defs.h"
|
|
|
|
#include "s1ap_eNB_itti_messaging.h"
|
|
|
|
#include "s1ap_eNB_encoder.h"
|
|
#include "s1ap_eNB_nnsf.h"
|
|
#include "s1ap_eNB_ue_context.h"
|
|
#include "s1ap_eNB_nas_procedures.h"
|
|
#include "s1ap_eNB_management_procedures.h"
|
|
#include "s1ap_eNB_context_management_procedures.h"
|
|
|
|
|
|
int s1ap_ue_context_release_complete(instance_t instance,
|
|
s1ap_ue_release_complete_t *ue_release_complete_p)
|
|
{
|
|
s1ap_eNB_instance_t *s1ap_eNB_instance_p = NULL;
|
|
struct s1ap_eNB_ue_context_s *ue_context_p = NULL;
|
|
S1AP_S1AP_PDU_t pdu;
|
|
S1AP_UEContextReleaseComplete_t *out;
|
|
S1AP_UEContextReleaseComplete_IEs_t *ie;
|
|
uint8_t *buffer;
|
|
uint32_t length;
|
|
|
|
/* Retrieve the S1AP eNB instance associated with Mod_id */
|
|
s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance);
|
|
|
|
DevAssert(ue_release_complete_p != NULL);
|
|
DevAssert(s1ap_eNB_instance_p != NULL);
|
|
|
|
/*RB_FOREACH(ue_context_p, s1ap_ue_map, &s1ap_eNB_instance_p->s1ap_ue_head) {
|
|
S1AP_WARN("in s1ap_ue_map: UE context eNB_ue_s1ap_id %u mme_ue_s1ap_id %u state %u\n",
|
|
ue_context_p->eNB_ue_s1ap_id, ue_context_p->mme_ue_s1ap_id,
|
|
ue_context_p->ue_state);
|
|
}*/
|
|
if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p,
|
|
ue_release_complete_p->eNB_ue_s1ap_id)) == NULL) {
|
|
/* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
|
|
S1AP_WARN("Failed to find ue context associated with eNB ue s1ap id: %u\n",
|
|
ue_release_complete_p->eNB_ue_s1ap_id);
|
|
return -1;
|
|
}
|
|
|
|
/* Prepare the S1AP message to encode */
|
|
memset(&pdu, 0, sizeof(pdu));
|
|
pdu.present = S1AP_S1AP_PDU_PR_successfulOutcome;
|
|
pdu.choice.successfulOutcome.procedureCode = S1AP_ProcedureCode_id_UEContextRelease;
|
|
pdu.choice.successfulOutcome.criticality = S1AP_Criticality_reject;
|
|
pdu.choice.successfulOutcome.value.present = S1AP_SuccessfulOutcome__value_PR_UEContextReleaseComplete;
|
|
out = &pdu.choice.successfulOutcome.value.choice.UEContextReleaseComplete;
|
|
|
|
/* mandatory */
|
|
ie = (S1AP_UEContextReleaseComplete_IEs_t *)calloc(1, sizeof(S1AP_UEContextReleaseComplete_IEs_t));
|
|
ie->id = S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID;
|
|
ie->criticality = S1AP_Criticality_ignore;
|
|
ie->value.present = S1AP_UEContextReleaseComplete_IEs__value_PR_MME_UE_S1AP_ID;
|
|
ie->value.choice.MME_UE_S1AP_ID = ue_context_p->mme_ue_s1ap_id;
|
|
asn1cSeqAdd(&out->protocolIEs.list, ie);
|
|
|
|
/* mandatory */
|
|
ie = (S1AP_UEContextReleaseComplete_IEs_t *)calloc(1, sizeof(S1AP_UEContextReleaseComplete_IEs_t));
|
|
ie->id = S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID;
|
|
ie->criticality = S1AP_Criticality_ignore;
|
|
ie->value.present = S1AP_UEContextReleaseComplete_IEs__value_PR_ENB_UE_S1AP_ID;
|
|
ie->value.choice.ENB_UE_S1AP_ID = ue_release_complete_p->eNB_ue_s1ap_id;
|
|
asn1cSeqAdd(&out->protocolIEs.list, ie);
|
|
|
|
|
|
if (s1ap_eNB_encode_pdu(&pdu, &buffer, &length) < 0) {
|
|
/* Encode procedure has failed... */
|
|
S1AP_ERROR("Failed to encode UE context release complete\n");
|
|
return -1;
|
|
}
|
|
|
|
/* UE associated signalling -> use the allocated stream */
|
|
s1ap_eNB_itti_send_sctp_data_req(s1ap_eNB_instance_p->instance,
|
|
ue_context_p->mme_ref->assoc_id, buffer,
|
|
length, ue_context_p->tx_stream);
|
|
|
|
//LG s1ap_eNB_itti_send_sctp_close_association(s1ap_eNB_instance_p->instance,
|
|
// ue_context_p->mme_ref->assoc_id);
|
|
// release UE context
|
|
struct s1ap_eNB_ue_context_s *ue_context2_p = NULL;
|
|
|
|
if ((ue_context2_p = RB_REMOVE(s1ap_ue_map, &s1ap_eNB_instance_p->s1ap_ue_head, ue_context_p))
|
|
!= NULL) {
|
|
S1AP_WARN("Removed UE context eNB_ue_s1ap_id %u\n",
|
|
ue_context2_p->eNB_ue_s1ap_id);
|
|
s1ap_eNB_free_ue_context(ue_context2_p);
|
|
} else {
|
|
S1AP_WARN("Removing UE context eNB_ue_s1ap_id %u: did not find context\n",
|
|
ue_context_p->eNB_ue_s1ap_id);
|
|
}
|
|
/*RB_FOREACH(ue_context_p, s1ap_ue_map, &s1ap_eNB_instance_p->s1ap_ue_head) {
|
|
S1AP_WARN("in s1ap_ue_map: UE context eNB_ue_s1ap_id %u mme_ue_s1ap_id %u state %u\n",
|
|
ue_context_p->eNB_ue_s1ap_id, ue_context_p->mme_ue_s1ap_id,
|
|
ue_context_p->ue_state);
|
|
}*/
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int s1ap_ue_context_release_req(instance_t instance,
|
|
s1ap_ue_release_req_t *ue_release_req_p)
|
|
{
|
|
s1ap_eNB_instance_t *s1ap_eNB_instance_p = NULL;
|
|
struct s1ap_eNB_ue_context_s *ue_context_p = NULL;
|
|
S1AP_S1AP_PDU_t pdu;
|
|
S1AP_UEContextReleaseRequest_t *out;
|
|
S1AP_UEContextReleaseRequest_IEs_t *ie;
|
|
uint8_t *buffer = NULL;
|
|
uint32_t length;
|
|
/* Retrieve the S1AP eNB instance associated with Mod_id */
|
|
s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance);
|
|
|
|
DevAssert(ue_release_req_p != NULL);
|
|
DevAssert(s1ap_eNB_instance_p != NULL);
|
|
|
|
if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p,
|
|
ue_release_req_p->eNB_ue_s1ap_id)) == NULL) {
|
|
/* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
|
|
S1AP_WARN("Failed to find ue context associated with eNB ue s1ap id: %u\n",
|
|
ue_release_req_p->eNB_ue_s1ap_id);
|
|
return -1;
|
|
}
|
|
|
|
/* Prepare the S1AP message to encode */
|
|
memset(&pdu, 0, sizeof(pdu));
|
|
pdu.present = S1AP_S1AP_PDU_PR_initiatingMessage;
|
|
pdu.choice.initiatingMessage.procedureCode = S1AP_ProcedureCode_id_UEContextReleaseRequest;
|
|
pdu.choice.initiatingMessage.criticality = S1AP_Criticality_ignore;
|
|
pdu.choice.initiatingMessage.value.present = S1AP_InitiatingMessage__value_PR_UEContextReleaseRequest;
|
|
out = &pdu.choice.initiatingMessage.value.choice.UEContextReleaseRequest;
|
|
|
|
/* mandatory */
|
|
ie = (S1AP_UEContextReleaseRequest_IEs_t *)calloc(1, sizeof(S1AP_UEContextReleaseRequest_IEs_t));
|
|
ie->id = S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID;
|
|
ie->criticality = S1AP_Criticality_reject;
|
|
ie->value.present = S1AP_UEContextReleaseRequest_IEs__value_PR_MME_UE_S1AP_ID;
|
|
ie->value.choice.MME_UE_S1AP_ID = ue_context_p->mme_ue_s1ap_id;
|
|
asn1cSeqAdd(&out->protocolIEs.list, ie);
|
|
|
|
/* mandatory */
|
|
ie = (S1AP_UEContextReleaseRequest_IEs_t *)calloc(1, sizeof(S1AP_UEContextReleaseRequest_IEs_t));
|
|
ie->id = S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID;
|
|
ie->criticality = S1AP_Criticality_reject;
|
|
ie->value.present = S1AP_UEContextReleaseRequest_IEs__value_PR_ENB_UE_S1AP_ID;
|
|
ie->value.choice.ENB_UE_S1AP_ID = ue_release_req_p->eNB_ue_s1ap_id;
|
|
asn1cSeqAdd(&out->protocolIEs.list, ie);
|
|
|
|
/* mandatory */
|
|
ie = (S1AP_UEContextReleaseRequest_IEs_t *)calloc(1, sizeof(S1AP_UEContextReleaseRequest_IEs_t));
|
|
ie->id = S1AP_ProtocolIE_ID_id_Cause;
|
|
ie->criticality = S1AP_Criticality_ignore;
|
|
ie->value.present = S1AP_UEContextReleaseRequest_IEs__value_PR_Cause;
|
|
|
|
switch (ue_release_req_p->cause) {
|
|
case S1AP_Cause_PR_radioNetwork:
|
|
ie->value.choice.Cause.present = S1AP_Cause_PR_radioNetwork;
|
|
ie->value.choice.Cause.choice.radioNetwork = ue_release_req_p->cause_value;
|
|
break;
|
|
|
|
case S1AP_Cause_PR_transport:
|
|
ie->value.choice.Cause.present = S1AP_Cause_PR_transport;
|
|
ie->value.choice.Cause.choice.transport = ue_release_req_p->cause_value;
|
|
break;
|
|
|
|
case S1AP_Cause_PR_nas:
|
|
ie->value.choice.Cause.present = S1AP_Cause_PR_nas;
|
|
ie->value.choice.Cause.choice.nas = ue_release_req_p->cause_value;
|
|
break;
|
|
|
|
case S1AP_Cause_PR_protocol:
|
|
ie->value.choice.Cause.present = S1AP_Cause_PR_protocol;
|
|
ie->value.choice.Cause.choice.protocol = ue_release_req_p->cause_value;
|
|
break;
|
|
|
|
case S1AP_Cause_PR_misc:
|
|
ie->value.choice.Cause.present = S1AP_Cause_PR_misc;
|
|
ie->value.choice.Cause.choice.misc = ue_release_req_p->cause_value;
|
|
break;
|
|
|
|
case S1AP_Cause_PR_NOTHING:
|
|
default:
|
|
ie->value.choice.Cause.present = S1AP_Cause_PR_NOTHING;
|
|
break;
|
|
}
|
|
|
|
asn1cSeqAdd(&out->protocolIEs.list, ie);
|
|
|
|
|
|
|
|
if (s1ap_eNB_encode_pdu(&pdu, &buffer, &length) < 0) {
|
|
/* Encode procedure has failed... */
|
|
S1AP_ERROR("Failed to encode UE context release complete\n");
|
|
return -1;
|
|
}
|
|
|
|
/* UE associated signalling -> use the allocated stream */
|
|
s1ap_eNB_itti_send_sctp_data_req(s1ap_eNB_instance_p->instance,
|
|
ue_context_p->mme_ref->assoc_id, buffer,
|
|
length, ue_context_p->tx_stream);
|
|
|
|
return 0;
|
|
}
|
|
|