/****************************************************************************
** **
** Name: _authentication_request() **
** **
** Description: Sends AUTHENTICATION REQUEST message and start timer T3460**
** **
** Inputs: args: handler parameters **
** Others: None **
** **
** Outputs: None **
** Return: RETURNok, RETURNerror **
** Others: T3460 **
** **
***************************************************************************/
int _authentication_request(authentication_data_t *data)
{
LOG_FUNC_IN;
emm_sap_t emm_sap;
int rc;
struct emm_data_context_s *emm_ctx;
/*
* Notify EMM-AS SAP that Authentication Request message has to be sent
* to the UE
*/
emm_sap.primitive = EMMAS_SECURITY_REQ;
emm_sap.u.emm_as.u.security.guti = NULL;
emm_sap.u.emm_as.u.security.ueid = data->ueid;
emm_sap.u.emm_as.u.security.msgType = EMM_AS_MSG_TYPE_AUTH;
emm_sap.u.emm_as.u.security.ksi = data->ksi;
emm_sap.u.emm_as.u.security.rand = &data->rand;
emm_sap.u.emm_as.u.security.autn = &data->autn;
/* TODO: check for pointer validity */
#if defined(NAS_BUILT_IN_EPC)
emm_ctx = emm_data_context_get(&_emm_data, data->ueid);
#else
emm_ctx = _emm_data.ctx[data->ueid];
#endif
/* Setup EPS NAS security data */
emm_as_set_security_data(&emm_sap.u.emm_as.u.security.sctx,
emm_ctx->security, FALSE, TRUE);
MSC_LOG_TX_MESSAGE(
MSC_NAS_EMM_MME,
MSC_NAS_EMM_MME,
NULL,0,
"0 EMMAS_SECURITY_REQ ue id "NAS_UE_ID_FMT" ", data->ueid);
rc = emm_sap_send(&emm_sap);
if (rc != RETURNerror) {
if (emm_ctx) {
if (emm_ctx->T3460.id != NAS_TIMER_INACTIVE_ID) {
/* Re-start T3460 timer */
emm_ctx->T3460.id = nas_timer_restart(emm_ctx->T3460.id);
MSC_LOG_EVENT(MSC_NAS_EMM_MME, "0 T3460 restarted UE "NAS_UE_ID_FMT" ", data->ueid);
} else {
/* Start T3460 timer */
emm_ctx->T3460.id = nas_timer_start(emm_ctx->T3460.sec, _authentication_t3460_handler,
data);
MSC_LOG_EVENT(MSC_NAS_EMM_MME, "0 T3460 started UE "NAS_UE_ID_FMT" ", data->ueid);
}
}
LOG_TRACE(INFO,"EMM-PROC - Timer T3460 (%d) expires in %ld seconds",
emm_ctx->T3460.id, emm_ctx->T3460.sec);
}
LOG_FUNC_RETURN (rc);
}
/****************************************************************************
** **
** Name: _identification_request() **
** **
** Description: Sends IDENTITY REQUEST message and start timer T3470. **
** **
** Inputs: args: handler parameters **
** Others: None **
** **
** Outputs: None **
** Return: None **
** Others: T3470 **
** **
***************************************************************************/
int _identification_request(identification_data_t *data)
{
emm_sap_t emm_sap;
int rc;
struct emm_data_context_s *emm_ctx = NULL;
LOG_FUNC_IN;
/*
* Notify EMM-AS SAP that Identity Request message has to be sent
* to the UE
*/
MSC_LOG_TX_MESSAGE(
MSC_NAS_EMM_MME,
MSC_NAS_EMM_MME,
NULL,0,
"0 EMMAS_SECURITY_REQ ue id "NAS_UE_ID_FMT" ", data->ueid);
emm_sap.primitive = EMMAS_SECURITY_REQ;
emm_sap.u.emm_as.u.security.guti = NULL;
emm_sap.u.emm_as.u.security.ueid = data->ueid;
emm_sap.u.emm_as.u.security.msgType = EMM_AS_MSG_TYPE_IDENT;
emm_sap.u.emm_as.u.security.identType = data->type;
#if defined(NAS_BUILT_IN_EPC)
if (data->ueid > 0) {
emm_ctx = emm_data_context_get(&_emm_data, data->ueid);
}
#else
if (data->ueid < EMM_DATA_NB_UE_MAX) {
emm_ctx = _emm_data.ctx[data->ueid];
}
#endif
/* Setup EPS NAS security data */
emm_as_set_security_data(&emm_sap.u.emm_as.u.security.sctx,
emm_ctx->security, FALSE, TRUE);
rc = emm_sap_send(&emm_sap);
if (rc != RETURNerror) {
if (emm_ctx->T3470.id != NAS_TIMER_INACTIVE_ID) {
/* Re-start T3470 timer */
emm_ctx->T3470.id = nas_timer_restart(emm_ctx->T3470.id);
MSC_LOG_EVENT(MSC_NAS_EMM_MME, "0 T3470 restarted UE "NAS_UE_ID_FMT" ", data->ueid);
} else {
/* Start T3470 timer */
emm_ctx->T3470.id = nas_timer_start(emm_ctx->T3470.sec, _identification_t3470_handler,
data);
MSC_LOG_EVENT(MSC_NAS_EMM_MME, "0 T3470 started UE "NAS_UE_ID_FMT" ", data->ueid);
}
LOG_TRACE(INFO,"EMM-PROC - Timer T3470 (%d) expires in %ld seconds",
emm_ctx->T3470.id, emm_ctx->T3470.sec);
}
LOG_FUNC_RETURN (rc);
}
/****************************************************************************
** **
** Name: esm_pt_start_timer() **
** **
** Description: Start the timer of the specified procedure transaction to **
** expire after a given time interval. Timer expiration will **
** schedule execution of the callback function where stored **
** ESM message should be re-transmit. **
** **
** Inputs: pti: The identity of the procedure transaction **
** msg: The encoded ESM message to be stored **
** sec: The value of the time interval in seconds **
** cb: Function executed upon timer expiration **
** Others: None **
** **
** Outputs: None **
** Return: RETURNok, RETURNerror **
** Others: _esm_pt_data **
** **
***************************************************************************/
int esm_pt_start_timer(int pti, const OctetString *msg,
long sec, nas_timer_callback_t cb)
{
LOG_FUNC_IN;
if ( (pti < ESM_PTI_MIN) || (pti > ESM_PTI_MAX) ) {
LOG_FUNC_RETURN (RETURNerror);
}
/* Get procedure transaction data */
esm_pt_context_t *ctx = _esm_pt_data.context[pti - ESM_PTI_MIN];
if ( (ctx == NULL) || (ctx->pti != pti) ) {
/* Procedure transaction not assigned */
LOG_FUNC_RETURN (RETURNerror);
}
if (ctx->timer.id != NAS_TIMER_INACTIVE_ID) {
if (ctx->args) {
/* Re-start the retransmission timer */
ctx->timer.id = nas_timer_restart(ctx->timer.id);
}
} else {
/* Setup the retransmission timer parameters */
ctx->args = (esm_pt_timer_data_t *)malloc(sizeof(esm_pt_timer_data_t));
if (ctx->args) {
/* Set the EPS bearer identity */
ctx->args->pti = pti;
/* Reset the retransmission counter */
ctx->args->count = 0;
/* Set the ESM message to be re-transmited */
ctx->args->msg.value = (uint8_t *)malloc(msg->length);
ctx->args->msg.length = 0;
if (ctx->args->msg.value) {
memcpy(ctx->args->msg.value, msg->value, msg->length);
ctx->args->msg.length = msg->length;
}
/* Setup the retransmission timer to expire at the given
* time interval */
ctx->timer.id = nas_timer_start(sec, cb, ctx->args);
ctx->timer.sec = sec;
}
}
if ( (ctx->args != NULL) && (ctx->timer.id != NAS_TIMER_INACTIVE_ID) ) {
LOG_TRACE(INFO, "ESM-FSM - Retransmission timer %d expires in "
"%ld seconds", ctx->timer.id, ctx->timer.sec);
LOG_FUNC_RETURN (RETURNok);
}
LOG_FUNC_RETURN (RETURNerror);
}
