/* * 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 #include #include #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; }