searchlight 0.3.0

use std::num::NonZeroU32;
use trust_dns_client::{
	proto::error::ProtoResult,
	rr::{IntoName, Name as DnsName},
};

pub(crate) fn iface_v6_name_to_index(name: &str) -> Result<NonZeroU32, std::io::Error> {
	use std::ffi::CString;

	#[cfg(windows)]
	use winapi::shared::netioapi::if_nametoindex;

	#[cfg(not(windows))]
	use libc::if_nametoindex;

	let name = CString::new(name).map_err(|_| std::io::Error::new(std::io::ErrorKind::InvalidInput, "Invalid interface name"))?;
	let index = unsafe { if_nametoindex(name.as_ptr()) };
	NonZeroU32::new(index).ok_or_else(std::io::Error::last_os_error)
}

pub trait IntoDnsName: IntoName {
	fn into_fqdn(self) -> ProtoResult<DnsName> {
		let name = self.into_name()?;
		if !name.is_fqdn() {
			// Attempt to append the root label
			return name.append_name(&".".into_name()?);
		}
		Ok(name)
	}
}
impl<T: IntoName> IntoDnsName for T {}