addr.ip4.as_u32 = out_addr->as_u32;
if (nat64_db_bib_entry_find (db, &addr, 0, proto, fib_index, 0))
return VNET_API_ERROR_INVALID_VALUE;
addr.ip4.as_u32 = out_addr->as_u32;
if (nat64_db_bib_entry_find (db, &addr, 0, proto, fib_index, 0))
return VNET_API_ERROR_INVALID_VALUE;