use nix::net::if_::*; #[cfg(any(target_os = "android", target_os = "linux"))] const LOOPBACK: &[u8] = b"lo"; #[cfg(not(any(target_os = "android", target_os = "linux")))] const LOOPBACK: &[u8] = b"lo0"; #[test] fn test_if_nametoindex() { assert!(if_nametoindex(LOOPBACK).is_ok()); }