zebra: add implicit-null labels to the rib

Implicit-null labels are never installed in the FIB but we need to keep
track of them because of L2/L3 VPN nexthop resolution.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>

diff --git a/zebra/zserv.c b/zebra/zserv.c
index aac3d23a9eaa2168557cac9a86204849c14ce388..dae6785aeed394c85d6ad98d70f6cfe0d691bd8a 100644 (file)
--- a/zebra/zserv.c
+++ b/zebra/zserv.c
@@ -1877,14 +1877,12 @@ static void zread_mpls_labels(int command, struct zserv *client, u_short length,
        if (command == ZEBRA_MPLS_LABELS_ADD) {
                mpls_lsp_install(zvrf, type, in_label, out_label, gtype, &gate,
                                 ifindex);
-               if (out_label != MPLS_IMP_NULL_LABEL)
-                       mpls_ftn_update(1, zvrf, type, &prefix, gtype, &gate,
-                                       ifindex, distance, out_label);
+               mpls_ftn_update(1, zvrf, type, &prefix, gtype, &gate, ifindex,
+                               distance, out_label);
        } else if (command == ZEBRA_MPLS_LABELS_DELETE) {
                mpls_lsp_uninstall(zvrf, type, in_label, gtype, &gate, ifindex);
-               if (out_label != MPLS_IMP_NULL_LABEL)
-                       mpls_ftn_update(0, zvrf, type, &prefix, gtype, &gate,
-                                       ifindex, distance, out_label);
+               mpls_ftn_update(0, zvrf, type, &prefix, gtype, &gate, ifindex,
+                               distance, out_label);
        }
 }
 /* Send response to a label manager connect request to client */