src/s11/handlers/s11_DDN_handler.c

/*
 * Copyright (c) 2019, Infosys Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <stdio.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>

#include "err_codes.h"
#include "options.h"
#include "ipc_api.h"
#include "message_queues.h"
#include "s11.h"
#include "s11_config.h"
#include "msgType.h"
//#include "detach_stage2_info.h"
#include "../../gtpV2Codec/gtpV2StackWrappers.h"
/*Globals and externs*/
extern int g_resp_fd;
extern struct GtpV2Stack* gtpStack_gp;
/*End : globals and externs*/


int
s11_DDN_handler(MsgBuffer* message, GtpV2MessageHeader* hdr)
{


	struct gtp_incoming_msg_data_t ddn_info;
	ddn_info.msg_type = downlink_data_notification;
	ddn_info.ue_idx = hdr->teid;
	ddn_info.msg_data.ddn_Q_msg_m.seq_no = hdr->sequenceNumber;


	DownlinkDataNotificationMsgData msgData;
	memset(&msgData, 0, sizeof(DownlinkDataNotificationMsgData));

	bool rc = GtpV2Stack_decodeMessage(gtpStack_gp, hdr, message, &msgData);
	if(rc == false)
	{
			
			log_msg(LOG_ERROR, "s11_Ddn_handler: "
					   "Failed to decode ddn Msg %d\n",
								hdr->teid);
			return E_PARSING_FAILED;
	}
	/*****Message structure****/
	log_msg(LOG_INFO, "Parse S11 Ddn message\n");

	//TODO : check cause for the result verification

	ddn_info.msg_data.ddn_Q_msg_m.arp.prioLevel = msgData.allocationRetentionPriority.pl;
	ddn_info.msg_data.ddn_Q_msg_m.arp.preEmptionCapab = msgData.allocationRetentionPriority.pci;
	ddn_info.msg_data.ddn_Q_msg_m.arp.preEmptionVulnebility = msgData.allocationRetentionPriority.pvi;
	ddn_info.msg_data.ddn_Q_msg_m.cause = msgData.cause.causeValue;
	ddn_info.msg_data.ddn_Q_msg_m.eps_bearer_id = msgData.epsBearerId.epsBearerId;

	ddn_info.destInstAddr = htonl(mmeAppInstanceNum_c);
	ddn_info.srcInstAddr = htonl(s11AppInstanceNum_c);

	/*Send DDN msg*/
	send_tipc_message(g_resp_fd, mmeAppInstanceNum_c, (char *)&ddn_info, GTP_READ_MSG_BUF_SIZE);

	log_msg(LOG_INFO, "Send ddn to mme-app\n");
	

	return SUCCESS;
}