245 lines
8.2 KiB
C
245 lines
8.2 KiB
C
/*
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* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
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*
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* This file is part of Open5GS.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "nas/nas-message.h"
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#include "gtp/gtp-message.h"
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#include "s1ap-build.h"
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#include "s1ap-handler.h"
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#include "s1ap-path.h"
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#include "mme-event.h"
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#include "mme-timer.h"
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#include "mme-sm.h"
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void s1ap_state_initial(ogs_fsm_t *s, mme_event_t *e)
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{
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ogs_assert(s);
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mme_sm_debug(e);
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OGS_FSM_TRAN(s, &s1ap_state_operational);
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}
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void s1ap_state_final(ogs_fsm_t *s, mme_event_t *e)
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{
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ogs_assert(s);
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mme_sm_debug(e);
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}
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void s1ap_state_operational(ogs_fsm_t *s, mme_event_t *e)
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{
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mme_enb_t *enb = NULL;
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ogs_pkbuf_t *pkbuf = NULL;
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S1AP_S1AP_PDU_t *pdu = NULL;
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S1AP_InitiatingMessage_t *initiatingMessage = NULL;
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S1AP_SuccessfulOutcome_t *successfulOutcome = NULL;
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S1AP_UnsuccessfulOutcome_t *unsuccessfulOutcome = NULL;
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ogs_assert(s);
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ogs_assert(e);
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mme_sm_debug(e);
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enb = e->enb;
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ogs_assert(enb);
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switch (e->id) {
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case OGS_FSM_ENTRY_SIG:
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break;
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case OGS_FSM_EXIT_SIG:
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break;
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case MME_EVT_S1AP_MESSAGE:
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pdu = e->s1ap_message;
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ogs_assert(pdu);
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switch (pdu->present) {
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case S1AP_S1AP_PDU_PR_initiatingMessage :
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initiatingMessage = pdu->choice.initiatingMessage;
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ogs_assert(initiatingMessage);
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switch (initiatingMessage->procedureCode) {
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case S1AP_ProcedureCode_id_S1Setup :
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s1ap_handle_s1_setup_request(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_initialUEMessage :
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s1ap_handle_initial_ue_message(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_uplinkNASTransport :
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s1ap_handle_uplink_nas_transport(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_UECapabilityInfoIndication :
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s1ap_handle_ue_capability_info_indication( enb, pdu);
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break;
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case S1AP_ProcedureCode_id_UEContextReleaseRequest:
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s1ap_handle_ue_context_release_request( enb, pdu);
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break;
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case S1AP_ProcedureCode_id_PathSwitchRequest:
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s1ap_handle_path_switch_request(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_eNBConfigurationTransfer:
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pkbuf = e->pkbuf;
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ogs_assert(pkbuf);
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s1ap_handle_enb_configuration_transfer(enb, pdu, pkbuf);
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break;
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case S1AP_ProcedureCode_id_HandoverPreparation:
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s1ap_handle_handover_required(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_HandoverCancel:
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s1ap_handle_handover_cancel(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_eNBStatusTransfer:
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s1ap_handle_enb_status_transfer(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_HandoverNotification:
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s1ap_handle_handover_notification(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_Reset:
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s1ap_handle_s1_reset(enb, pdu);
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break;
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default:
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ogs_warn("Not implemented(choice:%d, proc:%d)",
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pdu->present, (int)initiatingMessage->procedureCode);
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break;
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}
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break;
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case S1AP_S1AP_PDU_PR_successfulOutcome :
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successfulOutcome = pdu->choice.successfulOutcome;
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ogs_assert(successfulOutcome);
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switch (successfulOutcome->procedureCode) {
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case S1AP_ProcedureCode_id_InitialContextSetup:
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s1ap_handle_initial_context_setup_response(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_UEContextModification:
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s1ap_handle_ue_context_modification_response(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_UEContextRelease:
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s1ap_handle_ue_context_release_complete(
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enb, pdu);
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break;
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case S1AP_ProcedureCode_id_E_RABSetup:
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s1ap_handle_e_rab_setup_response(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_E_RABModify:
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break;
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case S1AP_ProcedureCode_id_E_RABRelease:
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break;
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case S1AP_ProcedureCode_id_HandoverResourceAllocation:
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s1ap_handle_handover_request_ack(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_WriteReplaceWarning:
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s1ap_handle_write_replace_warning_response(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_Kill:
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s1ap_handle_kill_response(enb, pdu);
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break;
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default:
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ogs_warn("Not implemented(choice:%d, proc:%d)",
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pdu->present, (int)successfulOutcome->procedureCode);
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break;
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}
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break;
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case S1AP_S1AP_PDU_PR_unsuccessfulOutcome :
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unsuccessfulOutcome = pdu->choice.unsuccessfulOutcome;
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ogs_assert(unsuccessfulOutcome);
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switch (unsuccessfulOutcome->procedureCode) {
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case S1AP_ProcedureCode_id_InitialContextSetup :
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s1ap_handle_initial_context_setup_failure(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_UEContextModification:
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s1ap_handle_ue_context_modification_failure(enb, pdu);
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break;
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case S1AP_ProcedureCode_id_HandoverResourceAllocation :
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s1ap_handle_handover_failure(enb, pdu);
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break;
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default:
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ogs_warn("Not implemented(choice:%d, proc:%d)",
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pdu->present, (int)unsuccessfulOutcome->procedureCode);
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break;
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}
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break;
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default:
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ogs_warn("Not implemented(choice:%d)", pdu->present);
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break;
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}
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break;
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case MME_EVT_S1AP_TIMER:
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switch (e->timer_id) {
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case MME_TIMER_S1_DELAYED_SEND:
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ogs_assert(e->enb_ue);
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ogs_assert(e->pkbuf);
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ogs_assert(OGS_OK == s1ap_send_to_enb_ue(e->enb_ue, e->pkbuf));
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ogs_timer_delete(e->timer);
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break;
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case MME_TIMER_UE_CONTEXT_RELEASE:
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ogs_assert(e->enb_ue);
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if (e->enb_ue->t_ue_context_release.retry_count >=
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mme_timer_cfg(MME_TIMER_UE_CONTEXT_RELEASE)->max_count) {
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/* Paging failed */
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ogs_warn("[S1AP] UE Context Release failed. Stop Releasing");
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CLEAR_ENB_UE_TIMER(e->enb_ue->t_ue_context_release);
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} else {
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e->enb_ue->t_ue_context_release.retry_count++;
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/*
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* If timeout, the saved pkbuf is used.
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* We don't have to set function parameter.
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* So, we just set all parameters to 0
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*/
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s1ap_send_ue_context_release_command(e->enb_ue, 0, 0, 0, 0);
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}
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break;
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default:
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ogs_error("Unknown timer[%s:%d]",
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mme_timer_get_name(e->timer_id), e->timer_id);
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break;
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}
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break;
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default:
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ogs_error("Unknown event %s", mme_event_get_name(e));
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break;
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}
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}
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void s1ap_state_exception(ogs_fsm_t *s, mme_event_t *e)
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{
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ogs_assert(s);
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ogs_assert(e);
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mme_sm_debug(e);
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switch (e->id) {
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case OGS_FSM_ENTRY_SIG:
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break;
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case OGS_FSM_EXIT_SIG:
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break;
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default:
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ogs_error("Unknown event %s", mme_event_get_name(e));
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break;
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}
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}
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