zebra: rib: use nexthop ptr in rib_add/delete

This simplifies the API for the following blackhole rework.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

lib/nexthop.c

@@ -36,7 +36,8 @@ DEFINE_MTYPE_STATIC(LIB, NEXTHOP, "Nexthop")
 DEFINE_MTYPE_STATIC(LIB, NH_LABEL, "Nexthop label")
 
 /* check if nexthops are same, non-recursive */
-int nexthop_same_no_recurse(struct nexthop *next1, struct nexthop *next2)
+int nexthop_same_no_recurse(const struct nexthop *next1,
+			    const struct nexthop *next2)
 {
 	if (next1->type != next2->type)
 		return 0;

lib/nexthop.h

@@ -135,8 +135,8 @@ void nexthop_add_labels(struct nexthop *, enum lsp_types_t, u_int8_t,
 void nexthop_del_labels(struct nexthop *);
 
 extern const char *nexthop_type_to_str(enum nexthop_types_t nh_type);
-extern int nexthop_same_no_recurse(struct nexthop *next1,
+extern int nexthop_same_no_recurse(const struct nexthop *next1,
-				   struct nexthop *next2);
+				   const struct nexthop *next2);
 extern int nexthop_labels_match(struct nexthop *nh1, struct nexthop *nh2);
 
 extern const char *nexthop2str(struct nexthop *nexthop, char *str, int size);

zebra/connected.c

@@ -177,6 +177,10 @@ static void connected_update(struct interface *ifp, struct connected *ifc)
 void connected_up_ipv4(struct interface *ifp, struct connected *ifc)
 {
 	struct prefix p;
+	struct nexthop nh = {
+		.type = NEXTHOP_TYPE_IFINDEX,
+		.ifindex = ifp->ifindex,
+	};
 
 	if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
 		return;
@@ -192,12 +196,10 @@ void connected_up_ipv4(struct interface *ifp, struct connected *ifc)
 		return;
 
 	rib_add(AFI_IP, SAFI_UNICAST, ifp->vrf_id, ZEBRA_ROUTE_CONNECT, 0, 0,
-		&p, NULL, NULL, NULL, ifp->ifindex, RT_TABLE_MAIN, ifp->metric,
+		&p, NULL, &nh, RT_TABLE_MAIN, ifp->metric, 0, 0);
-		0, 0);
 
 	rib_add(AFI_IP, SAFI_MULTICAST, ifp->vrf_id, ZEBRA_ROUTE_CONNECT, 0, 0,
-		&p, NULL, NULL, NULL, ifp->ifindex, RT_TABLE_MAIN, ifp->metric,
+		&p, NULL, &nh, RT_TABLE_MAIN, ifp->metric, 0, 0);
-		0, 0);
 
 	if (IS_ZEBRA_DEBUG_RIB_DETAILED)
 		zlog_debug(
@@ -306,6 +308,10 @@ void connected_add_ipv4(struct interface *ifp, int flags, struct in_addr *addr,
 void connected_down_ipv4(struct interface *ifp, struct connected *ifc)
 {
 	struct prefix p;
+	struct nexthop nh = {
+		.type = NEXTHOP_TYPE_IFINDEX,
+		.ifindex = ifp->ifindex,
+	};
 
 	if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
 		return;
@@ -323,10 +329,10 @@ void connected_down_ipv4(struct interface *ifp, struct connected *ifc)
 	/* Same logic as for connected_up_ipv4(): push the changes into the
 	 * head. */
 	rib_delete(AFI_IP, SAFI_UNICAST, ifp->vrf_id, ZEBRA_ROUTE_CONNECT, 0, 0,
-		   &p, NULL, NULL, ifp->ifindex, 0, 0);
+		   &p, NULL, &nh, 0, 0);
 
 	rib_delete(AFI_IP, SAFI_MULTICAST, ifp->vrf_id, ZEBRA_ROUTE_CONNECT, 0,
-		   0, &p, NULL, NULL, ifp->ifindex, 0, 0);
+		   0, &p, NULL, &nh, 0, 0);
 
 	if (IS_ZEBRA_DEBUG_RIB_DETAILED)
 		zlog_debug(
@@ -384,6 +390,10 @@ void connected_delete_ipv4(struct interface *ifp, int flags,
 void connected_up_ipv6(struct interface *ifp, struct connected *ifc)
 {
 	struct prefix p;
+	struct nexthop nh = {
+		.type = NEXTHOP_TYPE_IFINDEX,
+		.ifindex = ifp->ifindex,
+	};
 
 	if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
 		return;
@@ -400,8 +410,7 @@ void connected_up_ipv6(struct interface *ifp, struct connected *ifc)
 #endif
 
 	rib_add(AFI_IP6, SAFI_UNICAST, ifp->vrf_id, ZEBRA_ROUTE_CONNECT, 0, 0,
-		&p, NULL, NULL, NULL, ifp->ifindex, RT_TABLE_MAIN, ifp->metric,
+		&p, NULL, &nh, RT_TABLE_MAIN, ifp->metric, 0, 0);
-		0, 0);
 
 	if (IS_ZEBRA_DEBUG_RIB_DETAILED)
 		zlog_debug(
@@ -489,6 +498,10 @@ void connected_add_ipv6(struct interface *ifp, int flags, struct in6_addr *addr,
 void connected_down_ipv6(struct interface *ifp, struct connected *ifc)
 {
 	struct prefix p;
+	struct nexthop nh = {
+		.type = NEXTHOP_TYPE_IFINDEX,
+		.ifindex = ifp->ifindex,
+	};
 
 	if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
 		return;
@@ -501,7 +514,7 @@ void connected_down_ipv6(struct interface *ifp, struct connected *ifc)
 		return;
 
 	rib_delete(AFI_IP6, SAFI_UNICAST, ifp->vrf_id, ZEBRA_ROUTE_CONNECT, 0,
-		   0, &p, NULL, NULL, ifp->ifindex, 0, 0);
+		   0, &p, NULL, &nh, 0, 0);
 
 	if (IS_ZEBRA_DEBUG_RIB_DETAILED)
 		zlog_debug(

zebra/kernel_socket.c

@@ -849,6 +849,7 @@ void rtm_read(struct rt_msghdr *rtm)
 	union sockunion dest, mask, gate;
 	char ifname[INTERFACE_NAMSIZ + 1];
 	short ifnlen = 0;
+	struct nexthop nh;
 
 	zebra_flags = 0;
 
@@ -1015,19 +1016,22 @@ void rtm_read(struct rt_msghdr *rtm)
 		 */
 		if (rtm->rtm_type == RTM_CHANGE)
 			rib_delete(AFI_IP, SAFI_UNICAST, VRF_DEFAULT,
-				   ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL,
+				   ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p,
-				   NULL, 0, 0, 0);
+				   NULL, 0, 0);
+
+		memset(&nh, 0, sizeof(nh));
+		nh.type = NEXTHOP_TYPE_IPV4;
+		nh.gate.ipv4 = gate.sin;
 
-		union g_addr ggate = {.ipv4 = gate.sin.sin_addr};
 		if (rtm->rtm_type == RTM_GET || rtm->rtm_type == RTM_ADD
 		    || rtm->rtm_type == RTM_CHANGE)
 			rib_add(AFI_IP, SAFI_UNICAST, VRF_DEFAULT,
 				ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL,
-				&ggate, NULL, 0, 0, 0, 0, 0);
+				&nh, 0, 0, 0, 0);
 		else
 			rib_delete(AFI_IP, SAFI_UNICAST, VRF_DEFAULT,
 				   ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL,
-				   &ggate, 0, 0, 0);
+				   &nh, 0, 0);
 	}
 	if (dest.sa.sa_family == AF_INET6) {
 		/* One day we might have a debug section here like one in the
@@ -1057,19 +1061,24 @@ void rtm_read(struct rt_msghdr *rtm)
 		 */
 		if (rtm->rtm_type == RTM_CHANGE)
 			rib_delete(AFI_IP6, SAFI_UNICAST, VRF_DEFAULT,
-				   ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL,
+				   ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p,
-				   NULL, 0, 0, 0);
+				   NULL, NULL, 0, 0);
+
+		memset(&nh, 0, sizeof(nh));
+		nh.type = ifindex ? NEXTHOP_TYPE_IPV6_IFINDEX
+				  : NEXTHOP_TYPE_IPV6;
+		nh.gate.ipv6 = gate.sin6;
+		nh.ifindex = ifindex;
 
-		union g_addr ggate = {.ipv6 = gate.sin6.sin6_addr};
 		if (rtm->rtm_type == RTM_GET || rtm->rtm_type == RTM_ADD
 		    || rtm->rtm_type == RTM_CHANGE)
 			rib_add(AFI_IP6, SAFI_UNICAST, VRF_DEFAULT,
 				ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL,
-				&ggate, NULL, ifindex, 0, 0, 0, 0);
+				&nh, 0, 0, 0, 0);
 		else
 			rib_delete(AFI_IP6, SAFI_UNICAST, VRF_DEFAULT,
 				   ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL,
-				   &ggate, ifindex, 0, 0);
+				   &nh, 0, 0);
 	}
 }
 

zebra/redistribute.c

@@ -496,8 +496,6 @@ int zebra_add_import_table_entry(struct route_node *rn, struct route_entry *re,
 	struct route_entry *newre;
 	struct route_entry *same;
 	struct prefix p;
-	struct nexthop *nhop;
-	union g_addr *gate;
 	route_map_result_t ret = RMAP_MATCH;
 
 	if (rmap_name)
@@ -529,17 +527,10 @@ int zebra_add_import_table_entry(struct route_node *rn, struct route_entry *re,
 
 
 			if (re->nexthop_num == 1) {
-				nhop = re->nexthop;
-				if (nhop->type == NEXTHOP_TYPE_IFINDEX)
-					gate = NULL;
-				else
-					gate = (union g_addr *)&nhop->gate.ipv4;
-
 				rib_add(AFI_IP, SAFI_UNICAST, re->vrf_id,
 					ZEBRA_ROUTE_TABLE, re->table, 0, &p,
-					NULL, gate,
+					NULL, re->nexthop,
-					(union g_addr *)&nhop->src.ipv4,
+					zebrad.rtm_table_default,
-					nhop->ifindex, zebrad.rtm_table_default,
 					re->metric, re->mtu,
 					zebra_import_table_distance[AFI_IP]
 								   [re->table]);
@@ -580,7 +571,7 @@ int zebra_del_import_table_entry(struct route_node *rn, struct route_entry *re)
 		p.u.prefix4 = rn->p.u.prefix4;
 
 		rib_delete(AFI_IP, SAFI_UNICAST, re->vrf_id, ZEBRA_ROUTE_TABLE,
-			   re->table, re->flags, &p, NULL, NULL, 0,
+			   re->table, re->flags, &p, NULL, NULL,
 			   zebrad.rtm_table_default, re->metric);
 	}
 	/* DD: Add IPv6 code */

zebra/rib.h

@@ -294,18 +294,17 @@ extern int rib_uninstall_kernel(struct route_node *rn, struct route_entry *re);
  * also implicitly withdraw equal prefix of same type. */
 extern int rib_add(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type,
 		   u_short instance, int flags, struct prefix *p,
-		   struct prefix_ipv6 *src_p, union g_addr *gate,
+		   struct prefix_ipv6 *src_p, const struct nexthop *nh,
-		   union g_addr *src, ifindex_t ifindex, u_int32_t table_id,
+		   u_int32_t table_id, u_int32_t metric, u_int32_t mtu,
-		   u_int32_t metric, u_int32_t mtu, u_char distance);
+		   u_char distance);
 
 extern int rib_add_multipath(afi_t afi, safi_t safi, struct prefix *,
 			     struct prefix_ipv6 *src_p, struct route_entry *);
 
 extern void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type,
 		       u_short instance, int flags, struct prefix *p,
-		       struct prefix_ipv6 *src_p, union g_addr *gate,
+		       struct prefix_ipv6 *src_p, const struct nexthop *nh,
-		       ifindex_t ifindex, u_int32_t table_id,
+		       u_int32_t table_id, u_int32_t metric);
-		       u_int32_t metric);
 
 extern struct route_entry *rib_match(afi_t afi, safi_t safi, vrf_id_t,
 				     union g_addr *,

zebra/rt_netlink.c

@@ -365,11 +365,31 @@ static int netlink_route_change_read_unicast(struct sockaddr_nl *snl,
 		afi = AFI_IP6;
 
 	if (h->nlmsg_type == RTM_NEWROUTE) {
-		if (!tb[RTA_MULTIPATH])
+		if (!tb[RTA_MULTIPATH]) {
+			struct nexthop nh;
+			size_t sz = (afi == AFI_IP) ? 4 : 16;
+
+			memset(&nh, 0, sizeof(nh));
+			if (index && !gate)
+				nh.type = NEXTHOP_TYPE_IFINDEX;
+			else if (index && gate)
+				nh.type = (afi == AFI_IP)
+					? NEXTHOP_TYPE_IPV4_IFINDEX
+					: NEXTHOP_TYPE_IPV6_IFINDEX;
+			else if (!index && gate)
+				nh.type = (afi == AFI_IP)
+					? NEXTHOP_TYPE_IPV4
+					: NEXTHOP_TYPE_IPV6;
+			else
+				nh.type = NEXTHOP_TYPE_BLACKHOLE;
+			nh.ifindex = index;
+			if (prefsrc)
+				memcpy(&nh.src, prefsrc, sz);
+			if (gate)
+				memcpy(&nh.gate, gate, sz);
 			rib_add(afi, SAFI_UNICAST, vrf_id, ZEBRA_ROUTE_KERNEL,
-				0, flags, &p, NULL, gate, prefsrc, index, table,
+				0, flags, &p, NULL, &nh, table, metric, mtu, 0);
-				metric, mtu, 0);
+		} else {
-		else {
 			/* This is a multipath route */
 
 			struct route_entry *re;
@@ -444,41 +464,35 @@ static int netlink_route_change_read_unicast(struct sockaddr_nl *snl,
 						  NULL, re);
 		}
 	} else {
-		if (!tb[RTA_MULTIPATH])
+		if (!tb[RTA_MULTIPATH]) {
-			rib_delete(afi, SAFI_UNICAST, vrf_id,
+			struct nexthop nh;
-				   ZEBRA_ROUTE_KERNEL, 0, flags, &p, NULL, gate,
+			size_t sz = (afi == AFI_IP) ? 4 : 16;
-				   index, table, metric);
-		else {
-			struct rtnexthop *rtnh =
-				(struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]);
-
-			len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
-
-			for (;;) {
-				if (len < (int)sizeof(*rtnh)
-				    || rtnh->rtnh_len > len)
-					break;
-
-				gate = NULL;
-				if (rtnh->rtnh_len > sizeof(*rtnh)) {
-					memset(tb, 0, sizeof(tb));
-					netlink_parse_rtattr(
-						tb, RTA_MAX, RTNH_DATA(rtnh),
-						rtnh->rtnh_len - sizeof(*rtnh));
-					if (tb[RTA_GATEWAY])
-						gate = RTA_DATA(
-							tb[RTA_GATEWAY]);
-				}
 
+			memset(&nh, 0, sizeof(nh));
+			if (index && !gate)
+				nh.type = NEXTHOP_TYPE_IFINDEX;
+			else if (index && gate)
+				nh.type = (afi == AFI_IP)
+					? NEXTHOP_TYPE_IPV4_IFINDEX
+					: NEXTHOP_TYPE_IPV6_IFINDEX;
+			else if (!index && gate)
+				nh.type = (afi == AFI_IP)
+					? NEXTHOP_TYPE_IPV4
+					: NEXTHOP_TYPE_IPV6;
+			else
+				nh.type = NEXTHOP_TYPE_BLACKHOLE;
+			nh.ifindex = index;
 			if (gate)
+				memcpy(&nh.gate, gate, sz);
 			rib_delete(afi, SAFI_UNICAST, vrf_id,
-						   ZEBRA_ROUTE_KERNEL, 0, flags,
+				   ZEBRA_ROUTE_KERNEL, 0, flags, &p, NULL, &nh,
-						   &p, NULL, gate, index,
 				   table, metric);
-
+		} else {
-				len -= NLMSG_ALIGN(rtnh->rtnh_len);
+			/* XXX: need to compare the entire list of nexthops
-				rtnh = RTNH_NEXT(rtnh);
+			 * here for NLM_F_APPEND stupidity */
-			}
+			rib_delete(afi, SAFI_UNICAST, vrf_id,
+				   ZEBRA_ROUTE_KERNEL, 0, flags, &p, NULL,
+				   NULL, table, metric);
 		}
 	}
 

zebra/rtread_getmsg.c

@@ -75,8 +75,8 @@
 static void handle_route_entry(mib2_ipRouteEntry_t *routeEntry)
 {
 	struct prefix prefix;
-	struct in_addr tmpaddr, gateway;
+	struct in_addr tmpaddr;
-	union g_addr *ggateway;
+	struct nexthop nh;
 	u_char zebra_flags = 0;
 
 	if (routeEntry->ipRouteInfo.re_ire_type & IRE_CACHETABLE)
@@ -93,11 +93,12 @@ static void handle_route_entry(mib2_ipRouteEntry_t *routeEntry)
 	tmpaddr.s_addr = routeEntry->ipRouteMask;
 	prefix.prefixlen = ip_masklen(tmpaddr);
 
-	gateway.s_addr = routeEntry->ipRouteNextHop;
+	memset(&nh, 0, sizeof(nh));
-	ggateway = (union g_addr *)&gateway;
+	nh.type = NEXTHOP_TYPE_IPV4;
+	nh.gate.ipv4.s_addr = routeEntry->ipRouteNextHop;
 
 	rib_add(AFI_IP, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, 0,
-		zebra_flags, &prefix, NULL, ggateway, NULL, 0, 0, 0, 0, 0);
+		zebra_flags, &prefix, NULL, &nh, 0, 0, 0, 0);
 }
 
 void route_read(struct zebra_ns *zns)

zebra/zebra_rib.c

@@ -2273,16 +2273,15 @@ int rib_add_multipath(afi_t afi, safi_t safi, struct prefix *p,
 
 void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type,
 		u_short instance, int flags, struct prefix *p,
-		struct prefix_ipv6 *src_p, union g_addr *gate,
+		struct prefix_ipv6 *src_p, const struct nexthop *nh,
-		ifindex_t ifindex, u_int32_t table_id,
+		u_int32_t table_id, u_int32_t metric)
-		u_int32_t metric)
 {
 	struct route_table *table;
 	struct route_node *rn;
 	struct route_entry *re;
 	struct route_entry *fib = NULL;
 	struct route_entry *same = NULL;
-	struct nexthop *nexthop;
+	struct nexthop *rtnh;
 	char buf2[INET6_ADDRSTRLEN];
 
 	assert(!src_p || afi == AFI_IP6);
@@ -2332,9 +2331,9 @@ void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type,
 		if (re->type == ZEBRA_ROUTE_KERNEL &&
 		    re->metric != metric)
 			continue;
-		if (re->type == ZEBRA_ROUTE_CONNECT && (nexthop = re->nexthop)
+		if (re->type == ZEBRA_ROUTE_CONNECT && (rtnh = re->nexthop)
-		    && nexthop->type == NEXTHOP_TYPE_IFINDEX) {
+		    && rtnh->type == NEXTHOP_TYPE_IFINDEX && nh) {
-			if (nexthop->ifindex != ifindex)
+			if (rtnh->ifindex != nh->ifindex)
 				continue;
 			if (re->refcnt) {
 				re->refcnt--;
@@ -2347,14 +2346,12 @@ void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type,
 		}
 		/* Make sure that the route found has the same gateway. */
 		else {
-			if (gate == NULL) {
+			if (nh == NULL) {
 				same = re;
 				break;
 			}
-			for (ALL_NEXTHOPS(re->nexthop, nexthop))
+			for (ALL_NEXTHOPS(re->nexthop, rtnh))
-				if (IPV4_ADDR_SAME(&nexthop->gate.ipv4, &gate->ipv4)
+				if (nexthop_same_no_recurse(rtnh, nh)) {
-				    || IPV6_ADDR_SAME(&nexthop->gate.ipv6,
-						      gate)) {
 					same = re;
 					break;
 				}
@@ -2375,9 +2372,9 @@ void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type,
 			}
 			if (allow_delete) {
 				/* Unset flags. */
-				for (nexthop = fib->nexthop; nexthop;
+				for (rtnh = fib->nexthop; rtnh;
-				     nexthop = nexthop->next)
+				     rtnh = rtnh->next)
-					UNSET_FLAG(nexthop->flags,
+					UNSET_FLAG(rtnh->flags,
 						   NEXTHOP_FLAG_FIB);
 
 				UNSET_FLAG(fib->status,
@@ -2391,22 +2388,22 @@ void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type,
 			}
 		} else {
 			if (IS_ZEBRA_DEBUG_RIB) {
-				if (gate)
+				if (nh)
 					rnode_debug(
 						rn, vrf_id,
 						"via %s ifindex %d type %d "
 						"doesn't exist in rib",
 						inet_ntop(
-							family2afi(afi), gate,
+							family2afi(afi), &nh->gate,
 							buf2,
 							INET_ADDRSTRLEN), /* FIXME
 									     */
-						ifindex, type);
+						nh->ifindex, type);
 				else
 					rnode_debug(
 						rn, vrf_id,
-						"ifindex %d type %d doesn't exist in rib",
+						"type %d doesn't exist in rib",
-						ifindex, type);
+						type);
 			}
 			route_unlock_node(rn);
 			return;
@@ -2423,15 +2420,14 @@ void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type,
 
 int rib_add(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, u_short instance,
 	    int flags, struct prefix *p, struct prefix_ipv6 *src_p,
-	    union g_addr *gate, union g_addr *src, ifindex_t ifindex,
+	    const struct nexthop *nh, u_int32_t table_id, u_int32_t metric,
-	    u_int32_t table_id, u_int32_t metric, u_int32_t mtu,
+	    u_int32_t mtu, u_char distance)
-	    u_char distance)
 {
 	struct route_entry *re;
 	struct route_entry *same = NULL;
 	struct route_table *table;
 	struct route_node *rn;
-	struct nexthop *nexthop;
+	struct nexthop *rtnh;
 
 	assert(!src_p || afi == AFI_IP6);
 
@@ -2480,9 +2476,9 @@ int rib_add(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, u_short instance,
 			break;
 		}
 		/* Duplicate system route comes in. */
-		else if ((nexthop = re->nexthop)
+		else if ((rtnh = re->nexthop)
-			 && nexthop->type == NEXTHOP_TYPE_IFINDEX
+			 && rtnh->type == NEXTHOP_TYPE_IFINDEX
-			 && nexthop->ifindex == ifindex
+			 && rtnh->ifindex == nh->ifindex
 			 && !CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) {
 			re->refcnt++;
 			return 0;
@@ -2503,29 +2499,14 @@ int rib_add(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, u_short instance,
 	re->nexthop_num = 0;
 	re->uptime = time(NULL);
 
-	/* Nexthop settings. */
+	rtnh = nexthop_new();
-	if (gate) {
+	*rtnh = *nh;
-		if (afi == AFI_IP6) {
+	route_entry_nexthop_add(re, rtnh);
-			if (ifindex)
-				route_entry_nexthop_ipv6_ifindex_add(
-					re, &gate->ipv6, ifindex);
-			else
-				route_entry_nexthop_ipv6_add(re, &gate->ipv6);
-		} else {
-			if (ifindex)
-				route_entry_nexthop_ipv4_ifindex_add(
-					re, &gate->ipv4, &src->ipv4, ifindex);
-			else
-				route_entry_nexthop_ipv4_add(re, &gate->ipv4,
-							     &src->ipv4);
-		}
-	} else
-		route_entry_nexthop_ifindex_add(re, ifindex);
 
 	/* If this route is kernel route, set FIB flag to the route. */
 	if (RIB_SYSTEM_ROUTE(re))
-		for (nexthop = re->nexthop; nexthop; nexthop = nexthop->next)
+		for (rtnh = re->nexthop; rtnh; rtnh = rtnh->next)
-			SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB);
+			SET_FLAG(rtnh->flags, NEXTHOP_FLAG_FIB);
 
 	/* Link new rib to node.*/
 	if (IS_ZEBRA_DEBUG_RIB) {