sys/netinet/ip_output.c

224 	struct rtentry *rte;	/* cache for ro->ro_rt */
281 	rte = ro->ro_rt;
282 	if (rte == NULL) {
303 	rte = ro->ro_rt;
304 	if (rte && ((rte->rt_flags & RTF_UP) == 0 ||
305 		    rte->rt_ifp == NULL ||
306 		    !RT_LINK_IS_UP(rte->rt_ifp) ||
309 		RTFREE(rte);
310 		rte = ro->ro_rt = (struct rtentry *)NULL;
368 		if (rte == NULL) {
376 			rte = ro->ro_rt;
378 		if (rte == NULL ||
379 		    (rte->rt_flags & RTF_UP) == 0 ||
380 		    rte->rt_ifp == NULL ||
381 		    !RT_LINK_IS_UP(rte->rt_ifp)) {
395 		ia = ifatoia(rte->rt_ifa);
396 		ifp = rte->rt_ifp;
397 		counter_u64_add(rte->rt_pksent, 1);
399 		if (rte->rt_flags & RTF_GATEWAY)
400 			gw = (struct sockaddr_in *)rte->rt_gateway;
401 		if (rte->rt_flags & RTF_HOST)
402 			isbroadcast = (rte->rt_flags & RTF_BROADCAST);
411 	if (rte != NULL && (rte->rt_flags & (RTF_UP|RTF_HOST)))
412 		mtu = rte->rt_mtu;
416 	KASSERT(mtu > 0, ("%s: mtu %d <= 0, rte=%p (rt_flags=0x%08x) ifp=%p",
417 	    __func__, mtu, rte, (rte != NULL) ? rte->rt_flags : 0, ifp));
589 			rte = NULL;
709 	else if (rte == NULL)