macro_rules! unimpl {
    () => {
        return Err(io::const_io_error!(
            io::ErrorKind::Unsupported,
            "No networking available on L4Re.",
        ));
    };
}

pub mod net {
    #![allow(warnings)]
    use crate::fmt;
    use crate::io::{self, IoSlice, IoSliceMut};
    use crate::net::{Ipv4Addr, Ipv6Addr, Shutdown, SocketAddr};
    use crate::os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, RawFd};
    use crate::sys::fd::FileDesc;
    use crate::sys_common::{AsInner, FromInner, IntoInner};
    use crate::time::Duration;

    #[allow(unused_extern_crates)]
    pub extern crate libc as netc;

    pub struct Socket(FileDesc);
    impl Socket {
        pub fn new(_: &SocketAddr, _: libc::c_int) -> io::Result<Socket> {
            unimpl!();
        }

        pub fn new_raw(_: libc::c_int, _: libc::c_int) -> io::Result<Socket> {
            unimpl!();
        }

        pub fn new_pair(_: libc::c_int, _: libc::c_int) -> io::Result<(Socket, Socket)> {
            unimpl!();
        }

        pub fn connect_timeout(&self, _: &SocketAddr, _: Duration) -> io::Result<()> {
            unimpl!();
        }

        pub fn accept(
            &self,
            _: *mut libc::sockaddr,
            _: *mut libc::socklen_t,
        ) -> io::Result<Socket> {
            unimpl!();
        }

        pub fn duplicate(&self) -> io::Result<Socket> {
            unimpl!();
        }

        pub fn read(&self, _: &mut [u8]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn read_vectored(&self, _: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn is_read_vectored(&self) -> bool {
            false
        }

        pub fn peek(&self, _: &mut [u8]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn recv_from(&self, _: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
            unimpl!();
        }

        pub fn peek_from(&self, _: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
            unimpl!();
        }

        pub fn write(&self, _: &[u8]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn write_vectored(&self, _: &[IoSlice<'_>]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn is_write_vectored(&self) -> bool {
            false
        }

        pub fn set_timeout(&self, _: Option<Duration>, _: libc::c_int) -> io::Result<()> {
            unimpl!();
        }

        pub fn timeout(&self, _: libc::c_int) -> io::Result<Option<Duration>> {
            unimpl!();
        }

        pub fn shutdown(&self, _: Shutdown) -> io::Result<()> {
            unimpl!();
        }

        pub fn set_linger(&self, _: Option<Duration>) -> io::Result<()> {
            unimpl!();
        }

        pub fn linger(&self) -> io::Result<Option<Duration>> {
            unimpl!();
        }

        pub fn set_nodelay(&self, _: bool) -> io::Result<()> {
            unimpl!();
        }

        pub fn nodelay(&self) -> io::Result<bool> {
            unimpl!();
        }

        pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
            unimpl!();
        }

        pub fn take_error(&self) -> io::Result<Option<io::Error>> {
            unimpl!();
        }

        // This is used by sys_common code to abstract over Windows and Unix.
        pub fn as_raw(&self) -> RawFd {
            self.as_raw_fd()
        }
    }

    impl AsInner<FileDesc> for Socket {
        fn as_inner(&self) -> &FileDesc {
            &self.0
        }
    }

    impl FromInner<FileDesc> for Socket {
        fn from_inner(file_desc: FileDesc) -> Socket {
            Socket(file_desc)
        }
    }

    impl IntoInner<FileDesc> for Socket {
        fn into_inner(self) -> FileDesc {
            self.0
        }
    }

    impl AsFd for Socket {
        fn as_fd(&self) -> BorrowedFd<'_> {
            self.0.as_fd()
        }
    }

    impl AsRawFd for Socket {
        fn as_raw_fd(&self) -> RawFd {
            self.0.as_raw_fd()
        }
    }

    impl IntoRawFd for Socket {
        fn into_raw_fd(self) -> RawFd {
            self.0.into_raw_fd()
        }
    }

    impl FromRawFd for Socket {
        unsafe fn from_raw_fd(raw_fd: RawFd) -> Self {
            Self(FromRawFd::from_raw_fd(raw_fd))
        }
    }

    pub struct TcpStream {
        inner: Socket,
    }

    impl TcpStream {
        pub fn connect(_: io::Result<&SocketAddr>) -> io::Result<TcpStream> {
            unimpl!();
        }

        pub fn connect_timeout(_: &SocketAddr, _: Duration) -> io::Result<TcpStream> {
            unimpl!();
        }

        pub fn socket(&self) -> &Socket {
            &self.inner
        }

        pub fn into_socket(self) -> Socket {
            self.inner
        }

        pub fn set_read_timeout(&self, _: Option<Duration>) -> io::Result<()> {
            unimpl!();
        }

        pub fn set_write_timeout(&self, _: Option<Duration>) -> io::Result<()> {
            unimpl!();
        }

        pub fn read_timeout(&self) -> io::Result<Option<Duration>> {
            unimpl!();
        }

        pub fn write_timeout(&self) -> io::Result<Option<Duration>> {
            unimpl!();
        }

        pub fn peek(&self, _: &mut [u8]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn read(&self, _: &mut [u8]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn read_vectored(&self, _: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn is_read_vectored(&self) -> bool {
            false
        }

        pub fn write(&self, _: &[u8]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn write_vectored(&self, _: &[IoSlice<'_>]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn is_write_vectored(&self) -> bool {
            false
        }

        pub fn peer_addr(&self) -> io::Result<SocketAddr> {
            unimpl!();
        }

        pub fn socket_addr(&self) -> io::Result<SocketAddr> {
            unimpl!();
        }

        pub fn shutdown(&self, _: Shutdown) -> io::Result<()> {
            unimpl!();
        }

        pub fn duplicate(&self) -> io::Result<TcpStream> {
            unimpl!();
        }

        pub fn set_linger(&self, _: Option<Duration>) -> io::Result<()> {
            unimpl!();
        }

        pub fn linger(&self) -> io::Result<Option<Duration>> {
            unimpl!();
        }

        pub fn set_nodelay(&self, _: bool) -> io::Result<()> {
            unimpl!();
        }

        pub fn nodelay(&self) -> io::Result<bool> {
            unimpl!();
        }

        pub fn set_ttl(&self, _: u32) -> io::Result<()> {
            unimpl!();
        }

        pub fn ttl(&self) -> io::Result<u32> {
            unimpl!();
        }

        pub fn take_error(&self) -> io::Result<Option<io::Error>> {
            unimpl!();
        }

        pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
            unimpl!();
        }
    }

    impl FromInner<Socket> for TcpStream {
        fn from_inner(socket: Socket) -> TcpStream {
            TcpStream { inner: socket }
        }
    }

    impl fmt::Debug for TcpStream {
        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
            write!(f, "No networking support available on L4Re")
        }
    }

    pub struct TcpListener {
        inner: Socket,
    }

    impl TcpListener {
        pub fn bind(_: io::Result<&SocketAddr>) -> io::Result<TcpListener> {
            unimpl!();
        }

        pub fn socket(&self) -> &Socket {
            &self.inner
        }

        pub fn into_socket(self) -> Socket {
            self.inner
        }

        pub fn socket_addr(&self) -> io::Result<SocketAddr> {
            unimpl!();
        }

        pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> {
            unimpl!();
        }

        pub fn duplicate(&self) -> io::Result<TcpListener> {
            unimpl!();
        }

        pub fn set_ttl(&self, _: u32) -> io::Result<()> {
            unimpl!();
        }

        pub fn ttl(&self) -> io::Result<u32> {
            unimpl!();
        }

        pub fn set_only_v6(&self, _: bool) -> io::Result<()> {
            unimpl!();
        }

        pub fn only_v6(&self) -> io::Result<bool> {
            unimpl!();
        }

        pub fn take_error(&self) -> io::Result<Option<io::Error>> {
            unimpl!();
        }

        pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
            unimpl!();
        }
    }

    impl FromInner<Socket> for TcpListener {
        fn from_inner(socket: Socket) -> TcpListener {
            TcpListener { inner: socket }
        }
    }

    impl fmt::Debug for TcpListener {
        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
            write!(f, "No networking support available on L4Re.")
        }
    }

    pub struct UdpSocket {
        inner: Socket,
    }

    impl UdpSocket {
        pub fn bind(_: io::Result<&SocketAddr>) -> io::Result<UdpSocket> {
            unimpl!();
        }

        pub fn socket(&self) -> &Socket {
            &self.inner
        }

        pub fn into_socket(self) -> Socket {
            self.inner
        }

        pub fn peer_addr(&self) -> io::Result<SocketAddr> {
            unimpl!();
        }

        pub fn socket_addr(&self) -> io::Result<SocketAddr> {
            unimpl!();
        }

        pub fn recv_from(&self, _: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
            unimpl!();
        }

        pub fn peek_from(&self, _: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
            unimpl!();
        }

        pub fn send_to(&self, _: &[u8], _: &SocketAddr) -> io::Result<usize> {
            unimpl!();
        }

        pub fn duplicate(&self) -> io::Result<UdpSocket> {
            unimpl!();
        }

        pub fn set_read_timeout(&self, _: Option<Duration>) -> io::Result<()> {
            unimpl!();
        }

        pub fn set_write_timeout(&self, _: Option<Duration>) -> io::Result<()> {
            unimpl!();
        }

        pub fn read_timeout(&self) -> io::Result<Option<Duration>> {
            unimpl!();
        }

        pub fn write_timeout(&self) -> io::Result<Option<Duration>> {
            unimpl!();
        }

        pub fn set_broadcast(&self, _: bool) -> io::Result<()> {
            unimpl!();
        }

        pub fn broadcast(&self) -> io::Result<bool> {
            unimpl!();
        }

        pub fn set_multicast_loop_v4(&self, _: bool) -> io::Result<()> {
            unimpl!();
        }

        pub fn multicast_loop_v4(&self) -> io::Result<bool> {
            unimpl!();
        }

        pub fn set_multicast_ttl_v4(&self, _: u32) -> io::Result<()> {
            unimpl!();
        }

        pub fn multicast_ttl_v4(&self) -> io::Result<u32> {
            unimpl!();
        }

        pub fn set_multicast_loop_v6(&self, _: bool) -> io::Result<()> {
            unimpl!();
        }

        pub fn multicast_loop_v6(&self) -> io::Result<bool> {
            unimpl!();
        }

        pub fn join_multicast_v4(&self, _: &Ipv4Addr, _: &Ipv4Addr) -> io::Result<()> {
            unimpl!();
        }

        pub fn join_multicast_v6(&self, _: &Ipv6Addr, _: u32) -> io::Result<()> {
            unimpl!();
        }

        pub fn leave_multicast_v4(&self, _: &Ipv4Addr, _: &Ipv4Addr) -> io::Result<()> {
            unimpl!();
        }

        pub fn leave_multicast_v6(&self, _: &Ipv6Addr, _: u32) -> io::Result<()> {
            unimpl!();
        }

        pub fn set_ttl(&self, _: u32) -> io::Result<()> {
            unimpl!();
        }

        pub fn ttl(&self) -> io::Result<u32> {
            unimpl!();
        }

        pub fn take_error(&self) -> io::Result<Option<io::Error>> {
            unimpl!();
        }

        pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
            unimpl!();
        }

        pub fn recv(&self, _: &mut [u8]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn peek(&self, _: &mut [u8]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn send(&self, _: &[u8]) -> io::Result<usize> {
            unimpl!();
        }

        pub fn connect(&self, _: io::Result<&SocketAddr>) -> io::Result<()> {
            unimpl!();
        }
    }

    impl FromInner<Socket> for UdpSocket {
        fn from_inner(socket: Socket) -> UdpSocket {
            UdpSocket { inner: socket }
        }
    }

    impl fmt::Debug for UdpSocket {
        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
            write!(f, "No networking support on L4Re available.")
        }
    }

    pub struct LookupHost {
        original: *mut libc::addrinfo,
        cur: *mut libc::addrinfo,
    }

    impl Iterator for LookupHost {
        type Item = SocketAddr;
        fn next(&mut self) -> Option<SocketAddr> {
            None
        }
    }

    impl LookupHost {
        pub fn port(&self) -> u16 {
            0 // unimplemented
        }
    }

    unsafe impl Sync for LookupHost {}
    unsafe impl Send for LookupHost {}

    impl TryFrom<&str> for LookupHost {
        type Error = io::Error;

        fn try_from(_v: &str) -> io::Result<LookupHost> {
            unimpl!();
        }
    }

    impl<'a> TryFrom<(&'a str, u16)> for LookupHost {
        type Error = io::Error;

        fn try_from(_v: (&'a str, u16)) -> io::Result<LookupHost> {
            unimpl!();
        }
    }
}