+/**
+ * @brief no-op unlock function.
+ * The lifetime of the ILA entry is managed by the control plane
+ */
+static void
+ila_dpo_unlock (dpo_id_t *dpo)
+{
+}
+
+const static dpo_vft_t ila_vft = {
+ .dv_lock = ila_dpo_lock,
+ .dv_unlock = ila_dpo_unlock,
+ .dv_format = format_ila_dpo,
+};
+const static char* const ila_ip6_nodes[] =
+{
+ "ila-to-sir",
+ NULL,
+};
+const static char* const * const ila_nodes[DPO_PROTO_NUM] =
+{
+ [DPO_PROTO_IP6] = ila_ip6_nodes,
+};
+
+static fib_node_t *
+ila_fib_node_get_node (fib_node_index_t index)
+{
+ ila_main_t *ilm = &ila_main;
+ ila_entry_t *ie = pool_elt_at_index (ilm->entries, index);
+
+ return (&ie->ila_fib_node);
+}
+
+/**
+ * @brief no-op unlock function.
+ * The lifetime of the ILA entry is managed by the control plane
+ */
+static void
+ila_fib_node_last_lock_gone (fib_node_t *node)
+{
+}
+
+static ila_entry_t *
+ila_entry_from_fib_node (fib_node_t *node)
+{
+ return ((ila_entry_t*)(((char*)node) -
+ STRUCT_OFFSET_OF(ila_entry_t, ila_fib_node)));
+}
+
+/**
+ * @brief
+ * Callback function invoked when the forwarding changes for the ILA next-hop
+ */
+static fib_node_back_walk_rc_t
+ila_fib_node_back_walk_notify (fib_node_t *node,
+ fib_node_back_walk_ctx_t *ctx)
+{
+ ila_entry_stack(ila_entry_from_fib_node(node));
+
+ return (FIB_NODE_BACK_WALK_CONTINUE);
+}
+
+/*
+ * ILA's FIB graph node virtual function table
+ */
+static const fib_node_vft_t ila_fib_node_vft = {
+ .fnv_get = ila_fib_node_get_node,
+ .fnv_last_lock = ila_fib_node_last_lock_gone,
+ .fnv_back_walk = ila_fib_node_back_walk_notify,
+};
+