util.c

/* pingcheck - Check connectivity of interfaces in OpenWRT
 *
 * Copyright (C) 2015 Bruno Randolf <br1@einfach.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */
#include <time.h>

long timespec_diff_ms(struct timespec start, struct timespec end)
{
	return (end.tv_sec - start.tv_sec) * 1000
		   + (end.tv_nsec - start.tv_nsec) / 1000000;
}