Function convert_socket_error

crates/stdlib/src/socket.rs:3325–3357

(
        vm: &VirtualMachine,
        err: dns_lookup::LookupError,
        err_kind: SocketError,
    )

    };

    fn convert_socket_error(
        vm: &VirtualMachine,
        err: dns_lookup::LookupError,
        err_kind: SocketError,
    ) -> IoOrPyException {
        if let dns_lookup::LookupErrorKind::System = err.kind() {
            return io::Error::from(err).into();
        }
        let strerr = {
            #[cfg(unix)]
            {
                let s = match err_kind {
                    SocketError::GaiError => unsafe {
                        ffi::CStr::from_ptr(libc::gai_strerror(err.error_num()))
                    },
                    SocketError::HError => unsafe {
                        ffi::CStr::from_ptr(libc::hstrerror(err.error_num()))
                    },
                };
                s.to_str().unwrap()
            }
            #[cfg(windows)]
            {
                "getaddrinfo failed"
            }
        };
        let exception_cls = match err_kind {
            SocketError::GaiError => gaierror(vm),
            SocketError::HError => herror(vm),
        };
        vm.new_os_subtype_error(exception_cls, Some(err.error_num()), strerr)
            .into()
    }

    fn timeout_error(vm: &VirtualMachine) -> PyRef<PyOSError> {
        timeout_error_msg(vm, "timed out".to_owned())