/****************************************************************************
** **
** Name: network_api_encode_data() **
** **
** Description: Encodes Access Stratum message to be sent to the network **
** **
** Inputs data: Generic pointer to the AS data to encode **
** Others: None **
** **
** Outputs: Return: The number of characters that have been **
** successfully encoded; **
** RETURNerror otherwise. **
** Others: _network_api_send_buffer **
** **
***************************************************************************/
int network_api_encode_data(void* data)
{
LOG_FUNC_IN;
/* Encode the Access Stratum message */
int bytes = as_message_encode(_network_api_send_buffer,
(as_message_t*)(data),
NETWORK_API_SEND_BUFFER_SIZE);
if (bytes != RETURNerror) {
LOG_TRACE(INFO, "NET-API - %d bytes encoded", bytes);
}
LOG_FUNC_RETURN (bytes);
}
/*
* -----------------------------------------------------------------------------
* Functions used to process messages received from the MME NAS process
* -----------------------------------------------------------------------------
*/
static int _as_simulator_mme_process(int msg_id, as_message_t* msg)
{
int rc = RETURNok;
as_message_t cnf;
as_message_t ind;
printf("\nINFO\t: %s - Received AS message 0x%x from MME NAS process\n",
__FUNCTION__, msg_id);
_as_simulator_mme_transfer = AS_SIMULATOR_NO_TRANSFER;
memset(&cnf, 0, sizeof(as_message_t));
memset(&ind, 0, sizeof(as_message_t));
switch (msg_id)
{
case AS_NAS_ESTABLISH_RSP:
cnf.msgID = process_nas_establish_rsp(msg_id,
&msg->msg.nas_establish_rsp,
&cnf.msg.nas_establish_cnf);
if (cnf.msgID) {
/* Forward confirm message to the UE */
_as_simulator_mme_transfer |= AS_SIMULATOR_TRANSFER_TO_UE;
}
break;
case AS_DL_INFO_TRANSFER_REQ:
ind.msgID = process_dl_info_transfer_req(msg_id,
&msg->msg.dl_info_transfer_req,
&ind.msg.dl_info_transfer_ind,
&cnf.msg.dl_info_transfer_cnf);
if (ind.msgID) {
/* Forward indication message to the UE */
_as_simulator_mme_transfer |= AS_SIMULATOR_TRANSFER_TO_UE;
}
/* Return confirm message to the MME */
cnf.msgID = AS_DL_INFO_TRANSFER_CNF;
_as_simulator_mme_transfer |= AS_SIMULATOR_TRANSFER_TO_MME;
break;
case AS_NAS_RELEASE_REQ:
ind.msgID = process_nas_release_ind(msg_id,
&msg->msg.nas_release_req,
&ind.msg.nas_release_ind);
/* Forward indication message to the UE */
_as_simulator_mme_transfer |= AS_SIMULATOR_TRANSFER_TO_UE;
break;
default:
printf("WARNING\t: %s - AS message is not valid (0x%x)\n",
__FUNCTION__, msg_id);
rc = RETURNerror;
break;
}
if (_as_simulator_mme_transfer & AS_SIMULATOR_TRANSFER_TO_UE) {
if (ind.msgID > 0) {
/* Encode the message indication forwarded to the NAS running
* at the UE side */
_as_simulator_ue_size = as_message_encode(_as_simulator_ue_buffer,
&ind, AS_SIMULATOR_UE_BUFFER_SIZE);
}
else if (cnf.msgID > 0) {
/* Encode the message confirmation forwarded to the NAS running
* at the UE side */
_as_simulator_ue_size = as_message_encode(_as_simulator_ue_buffer,
&cnf, AS_SIMULATOR_UE_BUFFER_SIZE);
}
if (_as_simulator_ue_size == RETURNerror) {
_as_simulator_ue_size = 0;
rc = RETURNerror;
}
}
if (_as_simulator_mme_transfer & AS_SIMULATOR_TRANSFER_TO_MME) {
/* Encode the message confirmation returned to the NAS running
* at the MME side */
_as_simulator_mme_size = as_message_encode(_as_simulator_mme_buffer,
&cnf, AS_SIMULATOR_MME_BUFFER_SIZE);
if (_as_simulator_mme_size == RETURNerror) {
_as_simulator_mme_size = 0;
rc = RETURNerror;
}
}
return (rc);
}
