if (ipforward_rt.ro_rt) { RTFREE(ipforward_rt.ro_rt); ipforward_rt.ro_rt = 0; }
ip_slowtimo(){	struct ipq *fp, *nfp;	int s = splsoftnet();	ipq_lock();	for (fp = ipq.lh_first; fp != NULL; fp = nfp) {		nfp = fp->ipq_q.le_next;		if (--fp->ipq_ttl == 0) {			ipstat.ips_fragtimeout++;			ip_freef(fp);		}	}	ipq_unlock();	splx(s);}