-int nat64_db_init (nat64_db_t * db, u32 bib_buckets, u32 bib_memory_size,
- u32 st_buckets, u32 st_memory_size);
+int nat64_db_init (nat64_db_t * db, u32 bib_buckets, uword bib_memory_size,
+ u32 st_buckets, uword st_memory_size,
+ nat64_db_free_addr_port_function_t free_addr_port_cb);