error: field `addr_type` is never read
   --> src/ffi.rs:101:9
    |
98  | pub struct Hostent {
    |            ------- field in this struct
...
101 |     pub addr_type: i32,
    |         ^^^^^^^^^
    |
    = note: `Hostent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
    = note: `-D dead-code` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(dead_code)]`