/****************************************************************************
** **
** Name: emm_proc_detach_accept() **
** **
** Description: Performs the UE initiated detach procedure for EPS servi- **
** ces only When the DETACH ACCEPT message is received from **
** the network. **
** **
** 3GPP TS 24.301, section 5.5.2.2.2 **
** Upon receiving the DETACH ACCEPT message, the UE shall **
** stop timer T3421, locally deactivate all EPS bearer con- **
** texts without peer-to-peer signalling and enter state EMM-**
** DEREGISTERED. **
** **
** Inputs: None **
** Others: None **
** **
** Outputs: None **
** Return: RETURNok, RETURNerror **
** Others: T3421 **
** **
***************************************************************************/
int emm_proc_detach_accept(void)
{
LOG_FUNC_IN;
int rc;
LOG_TRACE(INFO, "EMM-PROC - UE initiated detach procedure completion");
/* Reset EMM procedure handler */
(void) emm_proc_lowerlayer_initialize(NULL, NULL, NULL, NULL);
/* Stop timer T3421 */
T3421.id = nas_timer_stop(T3421.id);
/*
* Notify ESM that all EPS bearer contexts have to be locally deactivated
*/
esm_sap_t esm_sap;
esm_sap.primitive = ESM_EPS_BEARER_CONTEXT_DEACTIVATE_REQ;
esm_sap.data.eps_bearer_context_deactivate.ebi = ESM_SAP_ALL_EBI;
rc = esm_sap_send(&esm_sap);
/*
* XXX - Upon receiving notification from ESM that all EPS bearer
* contexts are locally deactivated, the UE is considered as
* detached from the network and is entered state EMM-DEREGISTERED
*/
LOG_FUNC_RETURN(rc);
}
/****************************************************************************
** **
** Name: emm_proc_detach() **
** **
** Description: Initiates the detach procedure in order for the UE to de- **
** tach for EPS services. **
** **
** 3GPP TS 24.301, section 5.5.2.2.1 **
** In state EMM-REGISTERED or EMM-REGISTERED-INITIATED, the **
** UE initiates the detach procedure by sending a DETACH RE- **
** QUEST message to the network, starting timer T3421 and **
** entering state EMM-DEREGISTERED-INITIATED. **
** **
** Inputs: type: Type of the requested detach **
** switch_off: Indicates whether the detach is required **
** because the UE is switched off or not **
** Others: _emm_data **
** **
** Outputs: None **
** Return: RETURNok, RETURNerror **
** Others: _emm_detach_data **
** **
***************************************************************************/
int emm_proc_detach(emm_proc_detach_type_t type, int switch_off)
{
LOG_FUNC_IN;
emm_sap_t emm_sap;
emm_as_data_t *emm_as = &emm_sap.u.emm_as.u.data;
int rc;
LOG_TRACE(INFO, "EMM-PROC - Initiate EPS detach type = %s (%d)",
_emm_detach_type_str[type], type);
/* Initialize the detach procedure internal data */
_emm_detach_data.count = 0;
_emm_detach_data.switch_off = switch_off;
_emm_detach_data.type = type;
/* Setup EMM procedure handler to be executed upon receiving
* lower layer notification */
rc = emm_proc_lowerlayer_initialize(emm_proc_detach_request,
emm_proc_detach_failure,
emm_proc_detach_release, NULL);
if (rc != RETURNok) {
LOG_TRACE(WARNING, "Failed to initialize EMM procedure handler");
LOG_FUNC_RETURN (RETURNerror);
}
/* Setup NAS information message to transfer */
emm_as->NASinfo = EMM_AS_NAS_INFO_DETACH;
emm_as->NASmsg.length = 0;
emm_as->NASmsg.value = NULL;
/* Set the detach type */
emm_as->type = type;
/* Set the switch-off indicator */
emm_as->switch_off = switch_off;
/* Set the EPS mobile identity */
emm_as->guti = _emm_data.guti;
emm_as->ueid = 0;
/* Setup EPS NAS security data */
emm_as_set_security_data(&emm_as->sctx, _emm_data.security, FALSE, TRUE);
/*
* Notify EMM-AS SAP that Detach Request message has to
* be sent to the network
*/
emm_sap.primitive = EMMAS_DATA_REQ;
rc = emm_sap_send(&emm_sap);
LOG_FUNC_RETURN(rc);
}
/****************************************************************************
** **
** Name: emm_proc_attach_failure() **
** **
** Description: Performs the attach procedure abnormal case upon receipt **
** of transmission failure of Attach Request message or At- **
** tach Complete message. **
** **
** 3GPP TS 24.301, section 5.5.1.2.6, cases h and i **
** The UE shall restart the attach procedure when timer **
** T3411 expires. **
** **
** Inputs: is_initial: TRUE if the NAS message that failed to be **
** transfered is an initial NAS message (ESM **
** message embedded within an Attach Request **
** message) **
** args: Not used **
** Others: None **
** **
** Outputs: None **
** Return: RETURNok, RETURNerror **
** Others: T3410, T3411 **
** **
***************************************************************************/
int emm_proc_attach_failure(int is_initial, void *args)
{
LOG_FUNC_IN;
int rc = RETURNok;
esm_sap_t esm_sap;
LOG_TRACE(WARNING, "EMM-PROC - EPS attach failure");
/* Reset EMM procedure handler */
(void) emm_proc_lowerlayer_initialize(NULL, NULL, NULL, NULL);
/* Stop timer T3410 if still running */
if (T3410.id != NAS_TIMER_INACTIVE_ID) {
LOG_TRACE(INFO, "EMM-PROC - Stop timer T3410 (%d)", T3410.id);
T3410.id = nas_timer_stop(T3410.id);
}
if (is_initial) {
/*
* Notify ESM that the PDN CONNECTIVITY REQUEST message contained
* in the ESM message container IE of the ATTACH REQUEST has failed
* to be transmitted
*/
esm_sap.primitive = ESM_PDN_CONNECTIVITY_REJ;
esm_sap.is_standalone = FALSE;
esm_sap.recv = NULL;
} else {
/*
* Notify ESM that ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST message
* contained in the ESM message container IE of the ATTACH COMPLETE
* has failed to be transmitted
*/
esm_sap.primitive = ESM_DEFAULT_EPS_BEARER_CONTEXT_ACTIVATE_REJ;
esm_sap.is_standalone = FALSE;
esm_sap.recv = NULL;
}
rc = esm_sap_send(&esm_sap);
if (rc != RETURNerror) {
/* Start T3411 timer */
T3411.id = nas_timer_start(T3411.sec, _emm_attach_t3411_handler, NULL);
LOG_TRACE(INFO, "EMM-PROC - Timer T3411 (%d) expires in %ld seconds",
T3411.id, T3411.sec);
}
LOG_FUNC_RETURN(rc);
}
/****************************************************************************
** **
** Name: emm_proc_attach_complete() **
** **
** Description: Terminates the attach procedure when Attach Complete mes- **
** sage has been successfully delivered to the MME. **
** **
** 3GPP TS 24.301, section 5.5.1.2.4 **
** Upon successfully sending the ATTACH COMPLETE message, **
** the UE shall reset the attach attempt counter and tra- **
** cking area updating attempt counter, enter state EMM- **
** REGISTERED and set the EPS update status to EU1-UPDATED. **
** **
** Inputs: args: Not used **
** Others: None **
** **
** Outputs: None **
** Return: RETURNok, RETURNerror **
** Others: _emm_data, _emm_attach_data **
** **
***************************************************************************/
int emm_proc_attach_complete(void *args)
{
LOG_FUNC_IN;
emm_sap_t emm_sap;
esm_sap_t esm_sap;
int rc;
LOG_TRACE(INFO, "EMM-PROC - EPS attach complete");
/* Reset EMM procedure handler */
(void) emm_proc_lowerlayer_initialize(NULL, NULL, NULL, NULL);
/* Reset the attach attempt counter */
_emm_attach_data.attempt_count = 0;
/* TODO: Reset the tracking area updating attempt counter */
/* Set the EPS update status to EU1 UPDATED */
_emm_data.status = EU1_UPDATED;
_emm_data.is_attached = TRUE;
/*
* Notify EMM that network attach complete message has been delivered
* to the network
*/
emm_sap.primitive = EMMREG_ATTACH_CNF;
rc = emm_sap_send(&emm_sap);
if (rc != RETURNerror) {
/*
* Notify ESM that the Activate Default EPS Bearer Context Accept
* message has been delivered to the network within the Attach
* Complete message
*/
esm_sap.primitive = ESM_DEFAULT_EPS_BEARER_CONTEXT_ACTIVATE_CNF;
esm_sap.is_standalone = FALSE;
rc = esm_sap_send(&esm_sap);
}
LOG_FUNC_RETURN(rc);
}
/****************************************************************************
** **
** Name: _emm_detach_abort() **
** **
** Description: Aborts the detach procedure **
** **
** Inputs: type: not used **
** Others: _emm_detach_data **
** **
** Outputs: None **
** Return: RETURNok, RETURNerror **
** Others: T3421 **
** **
***************************************************************************/
static int _emm_detach_abort(emm_proc_detach_type_t type)
{
LOG_FUNC_IN;
emm_sap_t emm_sap;
int rc ;
LOG_TRACE(WARNING, "EMM-PROC - Abort the detach procedure");
/* Reset EMM procedure handler */
(void) emm_proc_lowerlayer_initialize(NULL, NULL, NULL, NULL);
/* Stop timer T3421 */
T3421.id = nas_timer_stop(T3421.id);
/*
* Notify EMM that detach procedure failed
*/
emm_sap.primitive = EMMREG_DETACH_FAILED;
emm_sap.u.emm_reg.u.detach.type = type;
rc = emm_sap_send(&emm_sap);
LOG_FUNC_RETURN (rc);
}
/****************************************************************************
** **
** Name: emm_proc_detach_failure() **
** **
** Description: Performs the detach procedure abnormal case upon receipt **
** of transmission failure of Detach Request message. **
** **
** 3GPP TS 24.301, section 5.5.2.2.4, case h **
** The UE shall restart the detach procedure. **
** **
** Inputs: is_initial: Not used **
** args: Not used **
** Others: _emm_detach_data **
** **
** Outputs: None **
** Return: RETURNok, RETURNerror **
** Others: None **
** **
***************************************************************************/
int emm_proc_detach_failure(int is_initial, void *args)
{
LOG_FUNC_IN;
emm_sap_t emm_sap;
int rc;
LOG_TRACE(WARNING, "EMM-PROC - Network detach failure");
/* Reset EMM procedure handler */
(void) emm_proc_lowerlayer_initialize(NULL, NULL, NULL, NULL);
/* Stop timer T3421 */
T3421.id = nas_timer_stop(T3421.id);
/*
* Notify EMM that detach procedure has to be restarted
*/
emm_sap.primitive = EMMREG_DETACH_INIT;
emm_sap.u.emm_reg.u.detach.switch_off = _emm_detach_data.switch_off;
rc = emm_sap_send(&emm_sap);
LOG_FUNC_RETURN(rc);
}
/****************************************************************************
** **
** Name: emm_proc_attach_accept() **
** **
** Description: Performs the attach procedure accepted by the network. **
** **
** 3GPP TS 24.301, section 5.5.1.2.4 **
** Upon receiving the ATTACH ACCEPT message, the UE shall **
** stop timer T3410 and send an ATTACH COMPLETE message to **
** the MME. **
** **
** Inputs: t3412: Value of the T3412 timer in seconds **
** t3402: Value of the T3402 timer in seconds **
** t3423: Value of the T3423 timer in seconds **
** n_tais: Number of tracking area identities contai- **
** ned in the TAI list **
** tai: The TAI list that identifies the tracking **
** areas the UE is registered to **
** guti: New UE's temporary identity assigned by **
** the MME (GUTI reallocation) **
** n_eplmns: Number of equivalent PLMNs **
** eplmns: List of equivalent PLMNs **
** esm_msg_pP: Activate default EPS bearer context re- **
** quest ESM message **
** Others: None **
** **
** Outputs: None **
** Return: RETURNok, RETURNerror **
** Others: _emm_data, T3412, T3402, T3423 **
** **
***************************************************************************/
int emm_proc_attach_accept(long t3412, long t3402, long t3423,
int n_tais, tai_t *tai, GUTI_t *guti,
int n_eplmns, plmn_t *eplmn,
const OctetString *esm_msg_pP)
{
LOG_FUNC_IN;
emm_sap_t emm_sap;
esm_sap_t esm_sap;
int rc;
int i;
int j;
LOG_TRACE(INFO, "EMM-PROC - EPS attach accepted by the network");
/* Stop timer T3410 */
LOG_TRACE(INFO, "EMM-PROC - Stop timer T3410 (%d)", T3410.id);
T3410.id = nas_timer_stop(T3410.id);
/* Delete old TAI list and store the received TAI list */
_emm_data.ltai.n_tais = n_tais;
for (i = 0; (i < n_tais) && (i < EMM_DATA_TAI_MAX); i++) {
_emm_data.ltai.tai[i] = tai[i];
}
/* Update periodic tracking area update timer value */
T3412.sec = t3412;
/* Update attach failure timer value */
if ( !(t3402 < 0) ) {
T3402.sec = t3402;
}
/* Update E-UTRAN deactivate ISR timer value */
if ( !(t3423 < 0) ) {
T3423.sec = t3423;
}
/* Delete old GUTI and store the new assigned GUTI if provided */
if (guti) {
*_emm_data.guti = *guti;
}
/* Update the stored list of equivalent PLMNs */
_emm_data.nvdata.eplmn.n_plmns = 0;
if (n_eplmns > 0) {
for (i = 0; (i < n_eplmns) && (i < EMM_DATA_EPLMN_MAX); i++) {
int is_forbidden = FALSE;
if (!_emm_data.is_emergency) {
/* If the attach procedure is not for emergency bearer
* services, the UE shall remove from the list any PLMN
* code that is already in the list of forbidden PLMNs */
for (j = 0; j < _emm_data.fplmn.n_plmns; j++) {
if (PLMNS_ARE_EQUAL(eplmn[i], _emm_data.fplmn.plmn[j])) {
is_forbidden = TRUE;
break;
}
}
}
if ( !is_forbidden ) {
_emm_data.nvdata.eplmn.plmn[_emm_data.nvdata.eplmn.n_plmns++] =
eplmn[i];
}
}
/* Add the PLMN code of the registered PLMN that sent the list */
if (_emm_data.nvdata.eplmn.n_plmns < EMM_DATA_EPLMN_MAX) {
_emm_data.nvdata.eplmn.plmn[_emm_data.nvdata.eplmn.n_plmns++] =
_emm_data.splmn;
}
}
/*
* Notify ESM that a default EPS bearer has to be activated
*/
esm_sap.primitive = ESM_DEFAULT_EPS_BEARER_CONTEXT_ACTIVATE_REQ;
esm_sap.is_standalone = FALSE;
esm_sap.recv = esm_msg_pP;
rc = esm_sap_send(&esm_sap);
if ( (rc != RETURNerror) && (esm_sap.err == ESM_SAP_SUCCESS) ) {
/* Setup EMM procedure handler to be executed upon receiving
* lower layer notification */
rc = emm_proc_lowerlayer_initialize(emm_proc_attach_complete,
emm_proc_attach_failure,
NULL, NULL);
if (rc != RETURNok) {
LOG_TRACE(WARNING,
"EMM-PROC - Failed to initialize EMM procedure handler");
LOG_FUNC_RETURN (RETURNerror);
}
/*
* Notify EMM-AS SAP that Attach Complete message together with
* an Activate Default EPS Bearer Context Accept message has to
* be sent to the network
*/
emm_sap.primitive = EMMAS_DATA_REQ;
emm_sap.u.emm_as.u.data.guti = _emm_data.guti;
emm_sap.u.emm_as.u.data.ueid = 0;
/* Setup EPS NAS security data */
emm_as_set_security_data(&emm_sap.u.emm_as.u.data.sctx,
_emm_data.security, FALSE, TRUE);
/* Get the activate default EPS bearer context accept message
* to be transfered within the ESM container of the attach
* complete message */
emm_sap.u.emm_as.u.data.NASinfo = EMM_AS_NAS_DATA_ATTACH;
emm_sap.u.emm_as.u.data.NASmsg = esm_sap.send;
rc = emm_sap_send(&emm_sap);
} else if (esm_sap.err != ESM_SAP_DISCARDED) {
/* 3GPP TS 24.301, section 5.5.1.2.6, case j
* If the ACTIVATE DEFAULT BEARER CONTEXT REQUEST message combined
* with the ATTACH ACCEPT is not accepted by the UE due to failure
* in the UE ESM sublayer, then the UE shall initiate the detach
* procedure by sending a DETACH REQUEST message to the network.
*/
emm_sap.primitive = EMMREG_DETACH_INIT;
rc = emm_sap_send(&emm_sap);
} else {
/*
* ESM procedure failed and, received message has been discarded or
* Status message has been returned; ignore ESM procedure failure
*/
rc = RETURNok;
}
LOG_FUNC_RETURN(rc);
}
/****************************************************************************
** **
** Name: emm_proc_attach() **
** **
** Description: Initiate EPS attach procedure to register a UE in PS mode **
** of operation for EPS services only, or register a UE for **
** emergency bearer services. **
** **
** 3GPP TS 24.301, section 5.5.1.2.2 **
** In state EMM-DEREGISTERED, the UE initiates the attach **
** procedure by sending an ATTACH REQUEST message to the MME,**
** starting timer T3410 and entering state EMM-REGISTERED- **
** INITIATED. **
** **
** Inputs: type: Type of the requested attach **
** Others: _emm_data **
** **
** Outputs: None **
** Return: RETURNok, RETURNerror **
** Others: T3402, T3410, T3411 **
** **
***************************************************************************/
int emm_proc_attach(emm_proc_attach_type_t type)
{
LOG_FUNC_IN;
emm_sap_t emm_sap;
emm_as_establish_t *emm_as = &emm_sap.u.emm_as.u.establish;
esm_sap_t esm_sap;
int rc;
LOG_TRACE(INFO, "EMM-PROC - Initiate EPS attach type = %s (%d)",
_emm_attach_type_str[type], type);
/* Update the emergency bearer service indicator */
if (type == EMM_ATTACH_TYPE_EMERGENCY) {
_emm_data.is_emergency = TRUE;
}
/* Setup initial NAS information message to transfer */
emm_as->NASinfo = EMM_AS_NAS_INFO_ATTACH;
/* Set the attach type */
emm_as->type = type;
/* Set the RRC connection establishment cause */
if (_emm_data.is_emergency) {
emm_as->RRCcause = NET_ESTABLISH_CAUSE_EMERGENCY;
emm_as->RRCtype = NET_ESTABLISH_TYPE_EMERGENCY_CALLS;
} else {
emm_as->RRCcause = NET_ESTABLISH_CAUSE_MO_SIGNAL;
emm_as->RRCtype = NET_ESTABLISH_TYPE_ORIGINATING_SIGNAL;
}
/* Set the PLMN identifier of the selected PLMN */
emm_as->plmnID = &_emm_data.splmn;
/*
* Process the EPS mobile identity
*/
emm_as->UEid.guti = NULL;
emm_as->UEid.tai = NULL;
emm_as->UEid.imsi = NULL;
emm_as->UEid.imei = NULL;
/* Check whether the UE is configured for "AttachWithIMSI" */
if (_emm_data.AttachWithImsi) {
/* Check whether the selected PLMN is neither the registered PLMN
* nor in the list of equivalent PLMNs */
if ( (!_emm_data.is_rplmn) && (!_emm_data.is_eplmn) ) {
LOG_TRACE(INFO, "EMM-PROC - Initiate EPS attach with IMSI");
/* Include the IMSI */
emm_as->UEid.imsi = _emm_data.imsi;
} else {
LOG_TRACE(INFO,
"EMM-PROC - Initiate EPS attach with NO IMSI, is registered PLMN %d, is equivalent PLMN %d",
_emm_data.is_rplmn,
_emm_data.is_eplmn);
}
} else if (_emm_data.guti) {
LOG_TRACE(INFO, "EMM-PROC - Initiate EPS attach with GUTI");
/* Include a valid GUTI and the last visited registered TAI */
emm_as->UEid.guti = _emm_data.guti;
emm_as->UEid.tai = _emm_data.tai;
} else if (!_emm_data.is_emergency) {
LOG_TRACE(INFO, "EMM-PROC - Initiate EPS attach with IMSI cause is no emergency and no GUTI");
/* Include the IMSI if no valid GUTI is available */
emm_as->UEid.imsi = _emm_data.imsi;
} else {
/* The UE is attaching for emergency bearer services and
* does not hold a valid GUTI */
if (_emm_data.imsi) {
/* Include the IMSI if valid (USIM is present) */
LOG_TRACE(INFO, "EMM-PROC - Initiate EPS attach with IMSI cause is emergency and no GUTI");
emm_as->UEid.imsi = _emm_data.imsi;
} else {
LOG_TRACE(INFO, "EMM-PROC - Initiate EPS attach with IMSI cause is emergency and no GUTI and no IMSI");
/* Include the IMEI if the IMSI is not valid */
emm_as->UEid.imei = _emm_data.imei;
}
}
/* Setup EPS NAS security data */
emm_as_set_security_data(&emm_as->sctx, _emm_data.security, FALSE, FALSE);
emm_as->ksi = EMM_AS_NO_KEY_AVAILABLE;
if (_emm_data.security) {
if (_emm_data.security->type != EMM_KSI_NOT_AVAILABLE) {
emm_as->ksi = _emm_data.security->eksi;
}
LOG_TRACE(INFO, "EMM-PROC - eps_encryption 0x%X", _emm_data.security->capability.eps_encryption);
LOG_TRACE(INFO, "EMM-PROC - eps_integrity 0x%X", _emm_data.security->capability.eps_integrity);
emm_as->encryption = _emm_data.security->capability.eps_encryption;
emm_as->integrity = _emm_data.security->capability.eps_integrity;
}
/*
* Notify ESM that initiation of a PDN connectivity procedure
* is requested to setup a default EPS bearer
*/
esm_sap.primitive = ESM_PDN_CONNECTIVITY_REQ;
esm_sap.is_standalone = FALSE;
esm_sap.data.pdn_connect.is_defined = TRUE;
esm_sap.data.pdn_connect.cid = 1;
/* TODO: PDN type should be set according to the IP capability of the UE */
esm_sap.data.pdn_connect.pdn_type = NET_PDN_TYPE_IPV4V6;
esm_sap.data.pdn_connect.apn = NULL;
esm_sap.data.pdn_connect.is_emergency = _emm_data.is_emergency;
rc = esm_sap_send(&esm_sap);
if (rc != RETURNerror) {
/* Setup EMM procedure handler to be executed upon receiving
* lower layer notification */
rc = emm_proc_lowerlayer_initialize(emm_proc_attach_request,
emm_proc_attach_failure,
emm_proc_attach_release, NULL);
if (rc != RETURNok) {
LOG_TRACE(WARNING, "Failed to initialize EMM procedure handler");
LOG_FUNC_RETURN (RETURNerror);
}
/* Start T3410 timer */
T3410.id = nas_timer_start(T3410.sec, _emm_attach_t3410_handler, NULL);
LOG_TRACE(INFO,"EMM-PROC - Timer T3410 (%d) expires in %ld seconds",
T3410.id, T3410.sec);
/* Stop T3402 and T3411 timers if running */
T3402.id = nas_timer_stop(T3402.id);
T3411.id = nas_timer_stop(T3411.id);
/*
* Notify EMM-AS SAP that a RRC connection establishment procedure
* is requested from the Access-Stratum to send initial NAS message
* attach request to the network
*/
emm_sap.primitive = EMMAS_ESTABLISH_REQ;
/* Get the PDN connectivity request to transfer within the ESM
* container of the initial attach request message */
emm_sap.u.emm_as.u.establish.NASmsg = esm_sap.send;
rc = emm_sap_send(&emm_sap);
}
LOG_FUNC_RETURN(rc);
}
/****************************************************************************
** **
** Name: emm_proc_identification_request() **
** **
** Description: Performs the MME requested identification procedure. **
** **
** 3GPP TS 24.301, section 5.4.4.3 **
** Upon receiving the IDENTITY REQUEST message, the UE shall **
** send an IDENTITY RESPONSE message to the network. The **
** IDENTITY RESPONSE message shall contain the identifica- **
** tion parameters as requested by the network. **
** **
** Inputs: type: Type of the requested identity **
** Others: None **
** **
** Outputs: None **
** Return: RETURNok, RETURNerror **
** Others: None **
** **
***************************************************************************/
int emm_proc_identification_request(emm_proc_identity_type_t type)
{
LOG_FUNC_IN;
int rc;
emm_sap_t emm_sap;
LOG_TRACE(INFO, "EMM-PROC - Identification requested type = %s (%d)",
_emm_identity_type_str[type], type);
/* Setup EMM procedure handler to be executed upon receiving
* lower layer notification */
rc = emm_proc_lowerlayer_initialize(NULL, NULL, NULL, NULL);
if (rc != RETURNok) {
LOG_TRACE(WARNING,
"EMM-PROC - Failed to initialize EMM procedure handler");
LOG_FUNC_RETURN (RETURNerror);
}
emm_sap.u.emm_as.u.security.identType = EMM_IDENT_TYPE_NOT_AVAILABLE;
switch (type) {
case EMM_IDENT_TYPE_IMSI:
{
imsi_t modified_imsi;
/* International Mobile Subscriber Identity is requested */
if (_emm_data.imsi) {
memcpy (&modified_imsi, _emm_data.imsi, sizeof (modified_imsi));
/* LW: Eventually replace the 0xF value set in MNC digit 3 by a 0 to avoid IMSI to be truncated before reaching HSS */
if (modified_imsi.u.num.digit6 == 0xF)
{
modified_imsi.u.num.digit6 = 0;
}
emm_sap.u.emm_as.u.security.identType = EMM_IDENT_TYPE_IMSI;
emm_sap.u.emm_as.u.security.imsi = &modified_imsi;
LOG_TRACE(INFO, "EMM-PROC - IMSI = %u%u%u %u%u%u %u%u%u%u%x%x%x%x%x",
emm_sap.u.emm_as.u.security.imsi->u.num.digit1,
emm_sap.u.emm_as.u.security.imsi->u.num.digit2,
emm_sap.u.emm_as.u.security.imsi->u.num.digit3,
emm_sap.u.emm_as.u.security.imsi->u.num.digit4,
emm_sap.u.emm_as.u.security.imsi->u.num.digit5,
emm_sap.u.emm_as.u.security.imsi->u.num.digit6,
emm_sap.u.emm_as.u.security.imsi->u.num.digit7,
emm_sap.u.emm_as.u.security.imsi->u.num.digit8,
emm_sap.u.emm_as.u.security.imsi->u.num.digit9,
emm_sap.u.emm_as.u.security.imsi->u.num.digit10,
emm_sap.u.emm_as.u.security.imsi->u.num.digit11,
emm_sap.u.emm_as.u.security.imsi->u.num.digit12,
emm_sap.u.emm_as.u.security.imsi->u.num.digit13,
emm_sap.u.emm_as.u.security.imsi->u.num.digit14,
emm_sap.u.emm_as.u.security.imsi->u.num.digit15);
}
break;
}
case EMM_IDENT_TYPE_IMEI:
/* International Mobile Equipment Identity is requested */
if (_emm_data.imei) {
emm_sap.u.emm_as.u.security.identType = EMM_IDENT_TYPE_IMEI;
emm_sap.u.emm_as.u.security.imei = _emm_data.imei;
}
break;
case EMM_IDENT_TYPE_TMSI:
/* Temporary Mobile Subscriber Identity is requested */
if (_emm_data.guti) {
emm_sap.u.emm_as.u.security.identType = EMM_IDENT_TYPE_TMSI;
emm_sap.u.emm_as.u.security.tmsi = _emm_data.guti->m_tmsi;
}
break;
default:
/* Other identities are not available */
break;
}
/*
* Notify EMM-AS SAP that Identity Response message has to be sent
* to the MME
*/
emm_sap.primitive = EMMAS_SECURITY_RES;
emm_sap.u.emm_as.u.security.guti = _emm_data.guti;
emm_sap.u.emm_as.u.security.ueid = 0;
emm_sap.u.emm_as.u.security.msgType = EMM_AS_MSG_TYPE_IDENT;
/* Setup EPS NAS security data */
emm_as_set_security_data(&emm_sap.u.emm_as.u.security.sctx,
_emm_data.security, FALSE, TRUE);
rc = emm_sap_send(&emm_sap);
LOG_FUNC_RETURN (rc);
}
