Function iptime

freebsd/netinet/ip_icmp.c:1023–1032

* Return milliseconds since 00:00 UTC in network format. */

 * Return milliseconds since 00:00 UTC in network format.
 */
uint32_t
iptime(void)
{
	struct timeval atv;
	u_long t;

	getmicrotime(&atv);
	t = (atv.tv_sec % (24*60*60)) * 1000 + atv.tv_usec / 1000;
	return (htonl(t));
}

/*
 * Return the next larger or smaller MTU plateau (table from RFC 1191)