+typedef void (ip4_enable_disable_interface_function_t)
+ (struct ip4_main_t * im, uword opaque, u32 sw_if_index, u32 is_enable);
+
+typedef struct
+{
+ ip4_enable_disable_interface_function_t *function;
+ uword function_opaque;
+} ip4_enable_disable_interface_callback_t;
+