bsd/netinet/in_arp.c

280 arp_llinfo_purge(struct rtentry *rt)
282 	struct llinfo_arp *la = rt->rt_llinfo;
284 	RT_LOCK_ASSERT_HELD(rt);
285 	VERIFY(rt->rt_llinfo_purge == arp_llinfo_purge && la != NULL);
288 		RT_CONVERT_LOCK(rt);
296 arp_llinfo_get_ri(struct rtentry *rt, struct rt_reach_info *ri)
298 	struct llinfo_arp *la = rt->rt_llinfo;
318 arp_llinfo_get_iflri(struct rtentry *rt, struct ifnet_llreach_info *iflri)
320 	struct llinfo_arp *la = rt->rt_llinfo;
424 arp_llreach_alloc(struct rtentry *rt, struct ifnet *ifp, void *addr,
427 	VERIFY(rt->rt_expire == 0 || rt->rt_rmx.rmx_expire != 0);
428 	VERIFY(rt->rt_expire != 0 || rt->rt_rmx.rmx_expire == 0);
430 	    rt->rt_expire != 0 && rt->rt_ifp != lo_ifp &&
433 		struct llinfo_arp *la = rt->rt_llinfo;
438 		RT_CONVERT_LOCK(rt);
450 				VERIFY(rt->rt_llinfo_purge != NULL);
451 				rt->rt_llinfo_purge(rt);
480 			    &SIN(rt_key(rt))->sin_addr, tmp, sizeof (tmp)));
491 	struct rtentry *rt = la->la_rt;
495 	RT_LOCK_ASSERT_HELD(rt);
497 	if (rt->rt_refcnt > 0 && (sdl = SDL(rt->rt_gateway)) &&
501 		rt->rt_flags &= ~RTF_REJECT;
502 		RT_UNLOCK(rt);
510 		if (rt->rt_refcnt == 0)
511 			rt_clear_idleref(rt);
512 		RT_UNLOCK(rt);
519 		RT_UNLOCK(rt);
520 		rtrequest_locked(RTM_DELETE, rt_key(rt), NULL, rt_mask(rt),
536 		struct rtentry *rt = la->la_rt;
538 		RT_LOCK(rt);
539 		VERIFY(rt->rt_expire == 0 || rt->rt_rmx.rmx_expire != 0);
540 		VERIFY(rt->rt_expire != 0 || rt->rt_rmx.rmx_expire == 0);
541 		if (rt->rt_expire && rt->rt_expire <= timenow)
544 			RT_UNLOCK(rt);
550 arp_validate(struct rtentry *rt)
552 	struct llinfo_arp *la = rt->rt_llinfo;
554 	RT_LOCK_ASSERT_HELD(rt);
560 		rt_set_idleref(rt);
581 	struct rtentry *rt,
584 	struct sockaddr *gate = rt->rt_gateway;
585 	struct llinfo_arp *la = rt->rt_llinfo;
594 	RT_LOCK_ASSERT_HELD(rt);
596 	if (rt->rt_flags & RTF_GATEWAY)
607 		if ((rt->rt_flags & RTF_HOST) == 0 && rt_mask(rt) != NULL &&
608 		    SIN(rt_mask(rt))->sin_addr.s_addr != 0xffffffff)
609 			rt->rt_flags |= RTF_CLONING;
610 		if (rt->rt_flags & RTF_CLONING) {
614 			if (rt_setgate(rt, rt_key(rt),
616 				gate = rt->rt_gateway;
617 				SDL(gate)->sdl_type = rt->rt_ifp->if_type;
618 				SDL(gate)->sdl_index = rt->rt_ifp->if_index;
623 				rt_setexpire(rt, MAX(timenow, 1));
628 		if (rt->rt_flags & RTF_ANNOUNCE) {
631 			RT_UNLOCK(rt);
632 			dlil_send_arp(rt->rt_ifp, ARPOP_REQUEST,
633 			    SDL(gate), rt_key(rt), NULL, rt_key(rt), 0);
634 			RT_LOCK(rt);
644 		SDL(gate)->sdl_type = rt->rt_ifp->if_type;
645 		SDL(gate)->sdl_index = rt->rt_ifp->if_index;
652 		rt->rt_llinfo = la = arp_llinfo_alloc();
658 		rt->rt_llinfo_get_ri = arp_llinfo_get_ri;
659 		rt->rt_llinfo_get_iflri = arp_llinfo_get_iflri;
660 		rt->rt_llinfo_purge = arp_llinfo_purge;
661 		rt->rt_llinfo_free = arp_llinfo_free;
665 		la->la_rt = rt;
666 		rt->rt_flags |= RTF_LLINFO;
676 		if (IN_MULTICAST(ntohl(SIN(rt_key(rt))->sin_addr.s_addr))) {
677 			RT_UNLOCK(rt);
678 			dlil_resolve_multi(rt->rt_ifp, rt_key(rt), gate,
680 			RT_LOCK(rt);
681 			rt_setexpire(rt, 0);
683 		else if (in_broadcast(SIN(rt_key(rt))->sin_addr, rt->rt_ifp)) {
686 			ifnet_llbroadcast_copy_bytes(rt->rt_ifp,
693 			rt_setexpire(rt, MAX(timenow, 1));
694 		} else if (IN_LINKLOCAL(ntohl(SIN(rt_key(rt))->sin_addr.s_addr))) {
703 			rt->rt_flags |= RTF_STATIC;
707 		RT_CONVERT_LOCK(rt);
708 		IFA_LOCK_SPIN(rt->rt_ifa);
709 		if (SIN(rt_key(rt))->sin_addr.s_addr ==
710 		    (IA_SIN(rt->rt_ifa))->sin_addr.s_addr) {
711 			IFA_UNLOCK(rt->rt_ifa);
723 			rt_setexpire(rt, 0);
724 			ifnet_lladdr_copy_bytes(rt->rt_ifp, LLADDR(SDL(gate)),
725 			    SDL(gate)->sdl_alen = rt->rt_ifp->if_addrlen);
727 				if (rt->rt_ifp != lo_ifp) {
731 					if (rt->rt_llinfo_purge != NULL)
732 						rt->rt_llinfo_purge(rt);
738 					if (rt->rt_if_ref_fn != NULL) {
739 						rt->rt_if_ref_fn(lo_ifp, 1);
740 						rt->rt_if_ref_fn(rt->rt_ifp, -1);
743 				rt->rt_ifp = lo_ifp;
746 			IFA_UNLOCK(rt->rt_ifa);
756 		 * itself is to be freed.  rt->rt_llinfo still points to
767 		if (rt->rt_llinfo_purge != NULL)
768 			rt->rt_llinfo_purge(rt);
770 		rt->rt_flags &= ~RTF_LLINFO;
816 	route_t rt;
830 	rt = rtalloc1_scoped((struct sockaddr*)&sin, create, 0, ifscope);
831 	if (rt == NULL)
834 	RT_LOCK(rt);
836 	if (rt->rt_flags & RTF_GATEWAY) {
839 	} else if (!(rt->rt_flags & RTF_LLINFO)) {
842 	} else if (rt->rt_gateway->sa_family != AF_LINK) {
861 		if (rt->rt_refcnt == 1 &&
862 		    (rt->rt_flags & (RTF_WASCLONED | RTF_STATIC)) ==
869 			rt->rt_flags |= RTF_CONDEMNED;
870 			RT_UNLOCK(rt);
871 			rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
872 			    rt_mask(rt), rt->rt_flags, 0);
873 			rtfree(rt);
875 			RT_REMREF_LOCKED(rt);
876 			RT_UNLOCK(rt);
882 	 * Caller releases reference and does RT_UNLOCK(rt).
884 	*route = rt;