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expected u8, found i8

I'm having trouble compiling this:

   Compiling ether v0.1.4
error[E0308]: mismatched types
   --> /some/path/.cargo/registry/src/github.com-1ecc6299db9ec823/ether-0.1.4/src/tap/tap.rs:106:37
    |
106 |                 iface.ifr_name[i] = c as i8;
    |                                     ^^^^^^^ expected u8, found i8

error: aborting due to previous error(s)

error: Could not compile `ether`.

This is rust 1.19, could you have a look into this?

/dev/bpf* doesn't exist, Error success

I ran into another issue:

let mut tap = tap::Tap::new("eth0").unwrap();

is failing with this error:

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error { repr: Os { code: 0, message: "Success" } }', src/libcore/result.rs:860

This is the code of open():

pub fn new(interface: &str) -> io::Result<Self> {
    fn open() -> io::Result<File> {
        // On macOS: bpf exposed as /dev/bpf###
        for entry in glob("/dev/bpf*").expect("Failed to read glob pattern") {
            if let Some(file) = entry
                   .ok()
                   .and_then(|path| {
                                 OpenOptions::new()
                                     .read(true)
                                     .write(true)
                                     .open(&path)
                                     .ok()
                             }) {
                return Ok(file);
            }
        }

        Err(io::Error::last_os_error())
    }

    let file = try!(open()); // this returns Err(io::Error::last_os_error())
    let config = Config::default();
    // [...]

It appears linux doesn't support berkley packet filter so it doesn't have /dev/bpf*, falls through the loop and returns last_os_error() which was unrelated and successful. :)

You might want to look into the pcap crate, I managed to dump traffic successfully using it, but I didn't feel like decoding ethernet, ip and tcp manually.

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