Robert Schmidt
0b91791f67
OAI is riddled with boolean_t, FALSE, TRUE, etc. This makes no sense, as there is a standard bool type, and could lead to nasty bugs if a definition of a bool is non-standard (0 == false, true == !false). This commit removes all non-standard bools in the whole project.
356 lines
16 KiB
C
356 lines
16 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 DefaultEpsBearerContextActivation.c
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Version 0.1
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Date 2013/01/28
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Product NAS stack
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Subsystem EPS Session Management
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Author Frederic Maurel
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Description Defines the default EPS bearer context activation ESM
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procedure executed by the Non-Access Stratum.
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The purpose of the default bearer context activation procedure
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is to establish a default EPS bearer context between the UE
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and the EPC.
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The procedure is initiated by the network as a response to
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the PDN CONNECTIVITY REQUEST message received from the UE.
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It can be part of the attach procedure.
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*****************************************************************************/
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#include "esm_proc.h"
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#include "commonDef.h"
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#include "nas_log.h"
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#include "esm_cause.h"
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#include "esm_ebr.h"
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#include "esm_ebr_context.h"
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#include "emm_sap.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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/****************** 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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* Default EPS bearer context activation procedure executed by the UE
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* --------------------------------------------------------------------------
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*/
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/****************************************************************************
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** **
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** Name: esm_proc_default_eps_bearer_context_request() **
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** **
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** Description: Creates local default EPS bearer context upon receipt of **
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** the ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST message. **
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** **
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** Inputs: pid: PDN connection identifier **
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** ebi: EPS bearer identity **
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** qos: EPS bearer level QoS parameters **
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** Others: None **
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** **
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** Outputs: esm_cause: Cause code returned upon ESM procedure **
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** failure **
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** Return: RETURNok, RETURNerror **
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** **
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***************************************************************************/
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int esm_proc_default_eps_bearer_context_request(nas_user_t *user, int pid, int ebi,
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const esm_proc_qos_t *qos,
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int *esm_cause)
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{
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LOG_FUNC_IN;
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esm_data_t *esm_data = user->esm_data;
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default_eps_bearer_context_data_t *default_eps_bearer_context_data = user->default_eps_bearer_context_data;
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int rc = RETURNerror;
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LOG_TRACE(INFO, "ESM-PROC - Default EPS bearer context activation "
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"requested by the network (ebi=%d)", ebi);
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/* Assign default EPS bearer context */
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int new_ebi = esm_ebr_assign(user->esm_ebr_data, ebi, pid+1, true);
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if (new_ebi == ESM_EBI_UNASSIGNED) {
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/* 3GPP TS 24.301, section 6.4.1.5, abnormal cases a and b
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* Default EPS bearer context activation request for an already
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* activated default or dedicated EPS bearer context
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*/
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int old_pid, old_bid;
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/* Locally deactivate the existing EPS bearer context and proceed
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* with the requested default EPS bearer context activation */
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rc = esm_proc_eps_bearer_context_deactivate(user, true, ebi,
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&old_pid, &old_bid);
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if (rc != RETURNok) {
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/* Failed to release EPS bearer context */
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*esm_cause = ESM_CAUSE_PROTOCOL_ERROR;
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} else {
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/* Assign new default EPS bearer context */
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ebi = esm_ebr_assign(user->esm_ebr_data, ebi, pid+1, true);
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}
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}
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if (ebi != ESM_EBI_UNASSIGNED) {
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/* Create new default EPS bearer context */
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ebi = esm_ebr_context_create(esm_data, user->ueid, pid, ebi, true, qos, NULL);
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if (ebi != ESM_EBI_UNASSIGNED) {
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/* Default EPS bearer contextx successfully created */
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default_eps_bearer_context_data->ebi = ebi;
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rc = RETURNok;
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} else {
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/* No resource available */
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LOG_TRACE(WARNING, "ESM-PROC - Failed to create new default EPS "
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"bearer context");
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*esm_cause = ESM_CAUSE_INSUFFICIENT_RESOURCES;
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}
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}
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LOG_FUNC_RETURN (rc);
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}
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/****************************************************************************
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** **
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** Name: esm_proc_default_eps_bearer_context_accept() **
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** **
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** Description: Performs default EPS bearer context activation procedure **
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** accepted by the UE. **
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** **
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** 3GPP TS 24.301, section 6.4.1.3 **
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** The UE accepts default EPS bearer context activation by **
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** sending ACTIVATE DEFAULT EPS BEARER CONTEXT ACCEPT mes- **
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** sage and entering the state BEARER CONTEXT ACTIVE. **
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** If the default bearer is activated as part of the attach **
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** procedure, the UE shall send the accept message together **
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** with ATTACH COMPLETE message. **
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** **
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** Inputs: is_standalone: Indicates whether the activate default EPS **
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** bearer context accept has to be sent stand-**
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** alone or together within an attach comple- **
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** te message **
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** ebi: EPS bearer identity **
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** msg: Encoded ESM message to be sent **
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** ue_triggered: true if the EPS bearer context procedure **
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** was triggered by the UE (should be always **
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** true) **
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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 esm_proc_default_eps_bearer_context_accept(nas_user_t *user, bool is_standalone, int ebi,
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OctetString *msg, bool ue_triggered)
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{
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LOG_FUNC_IN;
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int rc = RETURNok;
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esm_ebr_data_t *esm_ebr_data = user->esm_ebr_data;
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user_api_id_t *user_api_id = user->user_api_id;
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LOG_TRACE(INFO,"ESM-PROC - Default EPS bearer context activation "
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"accepted by the UE (ebi=%d)", ebi);
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if (is_standalone) {
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emm_sap_t emm_sap;
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emm_esm_data_t *emm_esm = &emm_sap.u.emm_esm.u.data;
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/*
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* Notity EMM that ESM PDU has to be forwarded to lower layers
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*/
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emm_sap.primitive = EMMESM_UNITDATA_REQ;
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emm_sap.u.emm_esm.ueid = user->ueid;
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emm_esm->msg.length = msg->length;
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emm_esm->msg.value = msg->value;
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rc = emm_sap_send(user, &emm_sap);
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}
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if (rc != RETURNerror) {
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/* Set the EPS bearer context state to ACTIVE */
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rc = esm_ebr_set_status(user_api_id, esm_ebr_data, ebi, ESM_EBR_ACTIVE, ue_triggered);
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if (rc != RETURNok) {
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/* The EPS bearer context was already in ACTIVE state */
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LOG_TRACE(WARNING, "ESM-PROC - EBI %d was already ACTIVE", ebi);
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/* Accept network retransmission of already accepted activate
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* default EPS bearer context request */
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LOG_FUNC_RETURN (RETURNok);
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}
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}
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LOG_FUNC_RETURN (rc);
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}
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/****************************************************************************
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** **
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** Name: esm_proc_default_eps_bearer_context_reject() **
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** **
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** Description: Performs default EPS bearer context activation procedure **
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** not accepted by the UE. **
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** **
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** 3GPP TS 24.301, section 6.4.1.4 **
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** The UE rejects default EPS bearer context activation by **
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** sending ACTIVATE DEFAULT EPS BEARER CONTEXT REJECT mes- **
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** sage and entering the state BEARER CONTEXT INACTIVE. **
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** If the default EPS bearer context activation is part of **
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** the attach procedure, the ESM sublayer shall notify the **
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** EMM sublayer of an ESM failure. **
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** **
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** Inputs: is_standalone: Indicates whether the activate default EPS **
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** bearer context accept has to be sent stand-**
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** alone or together within an attach comple- **
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** te message **
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** ebi: EPS bearer identity **
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** msg: Encoded ESM message to be sent **
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** ue_triggered: Not used **
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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 esm_proc_default_eps_bearer_context_reject(nas_user_t *user, bool is_standalone, int ebi,
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OctetString *msg, bool ue_triggered)
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{
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LOG_FUNC_IN;
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int rc = RETURNok;
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LOG_TRACE(WARNING, "ESM-PROC - Default EPS bearer context activation "
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"not accepted by the UE (ebi=%d)", ebi);
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if ( !esm_ebr_is_not_in_use(user->esm_ebr_data, ebi) ) {
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/* Release EPS bearer data currently in use */
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rc = esm_ebr_release(user->esm_ebr_data, ebi);
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}
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if (rc != RETURNok) {
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LOG_TRACE(WARNING, "ESM-PROC - Failed to release EPS bearer data");
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} else if (is_standalone) {
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emm_sap_t emm_sap;
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emm_esm_data_t *emm_esm = &emm_sap.u.emm_esm.u.data;
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/*
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* Notity EMM that ESM PDU has to be forwarded to lower layers
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*/
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emm_sap.primitive = EMMESM_UNITDATA_REQ;
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emm_sap.u.emm_esm.ueid = user->ueid;
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emm_esm->msg.length = msg->length;
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emm_esm->msg.value = msg->value;
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rc = emm_sap_send(user, &emm_sap);
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} else {
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/* An error is returned to notify EMM that the default EPS bearer
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* activation procedure initiated as part of the initial attach
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* procedure has failed
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*/
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rc = RETURNerror;
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}
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LOG_FUNC_RETURN (rc);
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}
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/****************************************************************************
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** **
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** Name: esm_proc_default_eps_bearer_context_complete() **
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** **
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** Description: Terminates the default EPS bearer context activation pro- **
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** cedure upon receiving indication from the EPS Mobility **
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** Management sublayer that the ACTIVATE DEFAULT EPS BEARER **
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** CONTEXT ACCEPT message has been successfully delivered to **
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** the MME. **
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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: RETURNok, RETURNerror **
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** **
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***************************************************************************/
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int esm_proc_default_eps_bearer_context_complete(default_eps_bearer_context_data_t *default_eps_bearer_context_data)
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{
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LOG_FUNC_IN;
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LOG_TRACE(INFO,
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"ESM-PROC - Default EPS bearer context activation complete");
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/* Reset default EPS bearer context internal data */
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default_eps_bearer_context_data->ebi = ESM_EBI_UNASSIGNED;
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LOG_FUNC_RETURN (RETURNok);
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}
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/****************************************************************************
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** **
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** Name: esm_proc_default_eps_bearer_context_failure() **
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** **
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** Description: Performs default EPS bearer context activation procedure **
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** upon receiving transmission failure of ESM message indi- **
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** cation from the EPS Mobility Management sublayer **
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** **
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** The UE releases the default EPS bearer context previously **
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** allocated before the ACTIVATE DEFAULT EPS BEARER CONTEXT **
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** ACCEPT message was sent. **
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** **
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** Inputs: None **
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** **
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** Outputs: None **
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** Return: RETURNok, RETURNerror **
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** **
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***************************************************************************/
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int esm_proc_default_eps_bearer_context_failure(nas_user_t *user)
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{
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LOG_FUNC_IN;
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default_eps_bearer_context_data_t *default_eps_bearer_context_data = user->default_eps_bearer_context_data;
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int ebi = default_eps_bearer_context_data->ebi;
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int pid, bid;
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LOG_TRACE(WARNING,
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"ESM-PROC - Default EPS bearer context activation failure");
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/* Release the default EPS bearer context and enter state INACTIVE */
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int rc = esm_proc_eps_bearer_context_deactivate(user, true, ebi, &pid, &bid);
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if (rc != RETURNerror) {
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/* Reset default EPS bearer context internal data */
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default_eps_bearer_context_data->ebi = ESM_EBI_UNASSIGNED;
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}
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LOG_FUNC_RETURN (rc);
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}
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