/*
 * This file is part of the Distributed Network Block Device 3
 *
 * Copyright(c) 2011-2012 Johann Latocha <johann@latocha.de>
 * Copyright(c) 2019 Frederic Robra <frederic@robra.org>
 *
 * This file may be licensed under the terms of of the
 * GNU General Public License Version 2 (the ``GPL'').
 *
 * Software distributed under the License is distributed
 * on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
 * express or implied. See the GPL for the specific language
 * governing rights and limitations.
 *
 * You should have received a copy of the GPL along with this
 * program. If not, go to http://www.gnu.org/licenses/gpl.html
 * or write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#include "utils.h"
#include "clientconfig.h"

#include <linux/kernel.h>


unsigned int inet_addr(char *str)
{
	int a, b, c, d;
	char arr[4];
	sscanf(str, "%d.%d.%d.%d", &a, &b, &c, &d);
	arr[0] = a;
	arr[1] = b;
	arr[2] = c;
	arr[3] = d;
	return *(unsigned int *) arr;
}

void inet_ntoa(struct in_addr addr, char *str)
{
	unsigned char *ptr = (unsigned char *) &addr;
	sprintf(str, "%d.%d.%d.%d", ptr[0] & 0xff, ptr[1] & 0xff, ptr[2] & 0xff, ptr[3] & 0xff);
}

uint64_t dnbd3_average_rtt(struct dnbd3_server *server)
{
	int i, j = 0;
	uint64_t avg = 0;
	for (i = 0; i < 4; i++) {
		avg += server->rtts[i];
		j += server->rtts[i] == 0 ? 0 : 1;
	}
	if (avg == 0) {
		return RTT_UNKNOWN;
	} else {
		avg = avg / j;
		avg += server->failures * avg / 10;
		return avg;
	}
}