src/s1ap/handlers/s1ap_tau_request_handler.c

/*
 * Copyright 2019-present Open Networking Foundation
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>


#include "err_codes.h"
#include "options.h"
#include "ipc_api.h"
#include "main.h"
#include "s1ap.h"
#include "s1ap_config.h"
#include "sctp_conn.h"
#include "s1ap_structs.h"
#include "s1ap_msg_codes.h"
#include "msgType.h"


extern int g_enb_fd;
extern ipc_handle ipc_S1ap_Hndl;

int
tau_request_handler(struct proto_IE *s1_tau_req_ies, int enb_fd)
{
	struct s1_incoming_msg_data_t req= {0};

	log_msg(LOG_INFO, "S1ap received tau Request:--\n");

	req.msg_type = tau_request;
    	req.msg_data.tauReq_Q_msg_m.enb_fd = enb_fd;

    for(int i = 0; i < s1_tau_req_ies->no_of_IEs; i++)
    {
        switch(s1_tau_req_ies->data[i].IE_type)
        {
		case S1AP_IE_ENB_UE_ID:
		{
			req.s1ap_enb_ue_id = s1_tau_req_ies->data[i].val.enb_ue_s1ap_id;
		}break;
		
		case S1AP_IE_MME_UE_ID:
		{
			req.ue_idx = s1_tau_req_ies->data[i].val.mme_ue_s1ap_id;	
		}break;

            	case S1AP_IE_NAS_PDU:
            	{
                	nas_pdu_header *hdr = &s1_tau_req_ies->data[i].val.nas.header;
                	req.msg_data.tauReq_Q_msg_m.seq_num = hdr->seq_no;
            	}break;
            	default:
			// Once MME starts handlign this request we can parse and send the content 
			log_msg(LOG_WARNING,"Unhandled IE In tau request %d",s1_tau_req_ies->data[i].IE_type);
		}
	}
	
	req.destInstAddr = htonl(mmeAppInstanceNum_c);
    	req.srcInstAddr = htonl(s1apAppInstanceNum_c);
    	send_tipc_message(ipc_S1ap_Hndl, mmeAppInstanceNum_c, (char *)&req, S1_READ_MSG_BUF_SIZE);


	log_msg(LOG_INFO, "Sent TAU request to mme-app\n");
	return SUCCESS;
}