175 lines
6.6 KiB
C
175 lines
6.6 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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/*****************************************************************************
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Source emm_esm.c
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Version 0.1
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Date 2012/10/16
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Product NAS stack
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Subsystem EPS Mobility Management
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Author Frederic Maurel
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Description Defines the EMMESM Service Access Point that provides
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interlayer services to the EPS Session Management sublayer
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for service registration and activate/deactivate PDN
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connections.
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*****************************************************************************/
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#include "emm_esm.h"
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#include "commonDef.h"
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#include "nas_log.h"
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#include "LowerLayer.h"
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#include "emm_proc.h"
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/****************************************************************************/
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/**************** E X T E R N A L D E F I N I T I O N S ****************/
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/****************************************************************************/
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/****************************************************************************/
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/******************* L O C A L D E F I N I T I O N S *******************/
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/****************************************************************************/
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/*
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* String representation of EMMESM-SAP primitives
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*/
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const char *emm_esm_primitive2str(int esmprim) {
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static const char *_emm_esm_primitive_str[] = {
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"EMMESM_ESTABLISH_REQ",
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"EMMESM_ESTABLISH_CNF",
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"EMMESM_ESTABLISH_REJ",
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"EMMESM_RELEASE_IND",
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"EMMESM_UNITDATA_REQ",
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"EMMESM_UNITDATA_IND",
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};
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return _emm_esm_primitive_str[esmprim];
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}
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/****************************************************************************/
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/****************** E X P O R T E D F U N C T I O N S ******************/
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/****************************************************************************/
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/****************************************************************************
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** **
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** Name: emm_esm_initialize() **
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** **
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** Description: Initializes the EMMESM Service Access Point **
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** **
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** Inputs: None **
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** Others: None **
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** **
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** Outputs: None **
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** Return: None **
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** Others: NONE **
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** **
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***************************************************************************/
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void emm_esm_initialize(void)
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{
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LOG_FUNC_IN;
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/* TODO: Initialize the EMMESM-SAP */
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LOG_FUNC_OUT;
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}
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/****************************************************************************
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** **
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** Name: emm_esm_send() **
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** **
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** Description: Processes the EMMESM Service Access Point primitive **
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** **
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** Inputs: msg: The EMMESM-SAP primitive to process **
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** Others: None **
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** **
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** Outputs: None **
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** Return: RETURNok, RETURNerror **
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** Others: None **
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** **
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***************************************************************************/
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int emm_esm_send(nas_user_t *user, const emm_esm_t *msg)
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{
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LOG_FUNC_IN;
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int rc = RETURNerror;
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emm_esm_primitive_t primitive = msg->primitive;
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LOG_TRACE(INFO, "EMMESM-SAP - Received primitive %s (%d)",
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emm_esm_primitive2str(primitive - _EMMESM_START - 1), primitive);
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switch (primitive) {
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case _EMMESM_ESTABLISH_REQ:
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/* ESM requests EMM to initiate an attach procedure before
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* requesting subsequent connectivity to additional PDNs */
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rc = emm_proc_attach_restart(user);
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break;
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case _EMMESM_ESTABLISH_CNF:
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/* ESM notifies EMM that PDN connectivity procedure successfully
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* processed */
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if (msg->u.establish.is_attached) {
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if (msg->u.establish.is_emergency) {
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/* Consider the UE attached for emergency bearer services
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* only */
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rc = emm_proc_attach_set_emergency(user->emm_data);
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}
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} else {
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/* Consider the UE locally detached from the network */
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rc = emm_proc_attach_set_detach(user);
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}
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break;
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case _EMMESM_ESTABLISH_REJ:
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/* ESM notifies EMM that PDN connectivity procedure failed */
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break;
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case _EMMESM_UNITDATA_REQ:
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/* ESM requests EMM to transfer ESM data unit to lower layer */
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rc = lowerlayer_data_req(user, &msg->u.data.msg);
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break;
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default:
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break;
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}
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if (rc != RETURNok) {
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LOG_TRACE(WARNING, "EMMESM-SAP - Failed to process primitive %s (%d)",
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emm_esm_primitive2str(primitive - _EMMESM_START - 1),
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primitive);
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}
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LOG_FUNC_RETURN (rc);
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}
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/****************************************************************************/
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/********************* L O C A L F U N C T I O N S *********************/
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/****************************************************************************/
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