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diff --git a/third_party/rust/mio-0.6.23/src/udp.rs b/third_party/rust/mio-0.6.23/src/udp.rs
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+++ b/third_party/rust/mio-0.6.23/src/udp.rs
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+//! Primitives for working with UDP
+//!
+//! The types provided in this module are non-blocking by default and are
+//! designed to be portable across all supported Mio platforms. As long as the
+//! [portability guidelines] are followed, the behavior should be identical no
+//! matter the target platform.
+//!
+//! [portability guidelines]: ../struct.Poll.html#portability
+
+#![allow(deprecated)]
+
+use {sys, Ready, Poll, PollOpt, Token};
+use io::{self, MapNonBlock};
+use event::Evented;
+use poll::SelectorId;
+use std::net::{self, Ipv4Addr, Ipv6Addr, SocketAddr};
+
+/// A User Datagram Protocol socket.
+///
+/// This is an implementation of a bound UDP socket. This supports both IPv4 and
+/// IPv6 addresses, and there is no corresponding notion of a server because UDP
+/// is a datagram protocol.
+#[derive(Debug)]
+pub struct UdpSocket {
+    sys: sys::UdpSocket,
+    selector_id: SelectorId,
+}
+
+impl UdpSocket {
+    /// Creates a UDP socket from the given address.
+    pub fn bind(addr: &SocketAddr) -> io::Result<UdpSocket> {
+        let socket = net::UdpSocket::bind(addr)?;
+        UdpSocket::from_socket(socket)
+    }
+
+    /// Creates a new mio-wrapped socket from an underlying and bound std
+    /// socket.
+    ///
+    /// This function requires that `socket` has previously been bound to an
+    /// address to work correctly, and returns an I/O object which can be used
+    /// with mio to send/receive UDP messages.
+    ///
+    /// This can be used in conjunction with net2's `UdpBuilder` interface to
+    /// configure a socket before it's handed off to mio, such as setting
+    /// options like `reuse_address` or binding to multiple addresses.
+    pub fn from_socket(socket: net::UdpSocket) -> io::Result<UdpSocket> {
+        Ok(UdpSocket {
+            sys: sys::UdpSocket::new(socket)?,
+            selector_id: SelectorId::new(),
+        })
+    }
+
+    /// Returns the socket address that this socket was created from.
+    pub fn local_addr(&self) -> io::Result<SocketAddr> {
+        self.sys.local_addr()
+    }
+
+    /// Creates a new independently owned handle to the underlying socket.
+    ///
+    /// The returned `UdpSocket` is a reference to the same socket that this
+    /// object references. Both handles will read and write the same port, and
+    /// options set on one socket will be propagated to the other.
+    pub fn try_clone(&self) -> io::Result<UdpSocket> {
+        self.sys.try_clone()
+            .map(|s| {
+                UdpSocket {
+                    sys: s,
+                    selector_id: self.selector_id.clone(),
+                }
+            })
+    }
+
+    /// Sends data on the socket to the given address. On success, returns the
+    /// number of bytes written.
+    ///
+    /// Address type can be any implementor of `ToSocketAddrs` trait. See its
+    /// documentation for concrete examples.
+    pub fn send_to(&self, buf: &[u8], target: &SocketAddr)
+                   -> io::Result<Option<usize>> {
+        self.sys.send_to(buf, target).map_non_block()
+    }
+
+    /// Receives data from the socket and stores data in the supplied buffer `buf`. On success,
+    /// returns the number of bytes read and the address from whence the data came.
+    ///
+    /// The function must be called with valid byte array `buf` of sufficient size to
+    /// hold the message bytes. If a message is too long to fit in the supplied buffer,
+    /// excess bytes may be discarded.
+    ///
+    /// The function does not read from `buf`, but is overwriting previous content of `buf`.
+    ///
+    /// Assuming the function has read `n` bytes, slicing `&buf[..n]` provides
+    /// efficient access with iterators and boundary checks.
+    pub fn recv_from(&self, buf: &mut [u8])
+                     -> io::Result<Option<(usize, SocketAddr)>> {
+        self.sys.recv_from(buf).map_non_block()
+    }
+
+    /// Sends data on the socket to the address previously bound via connect(). On success,
+    /// returns the number of bytes written.
+    pub fn send(&self, buf: &[u8])
+                   -> io::Result<Option<usize>> {
+        self.sys.send(buf).map_non_block()
+    }
+
+    /// Receives data from the socket previously bound with connect() and stores data in
+    /// the supplied buffer `buf`. On success, returns the number of bytes read.
+    ///
+    /// The function must be called with valid byte array `buf` of sufficient size to
+    /// hold the message bytes. If a message is too long to fit in the supplied buffer,
+    /// excess bytes may be discarded.
+    ///
+    /// The function does not read from `buf`, but is overwriting previous content of `buf`.
+    ///
+    /// Assuming the function has read `n` bytes, slicing `&buf[..n]` provides
+    /// efficient access with iterators and boundary checks.
+    pub fn recv(&self, buf: &mut [u8])
+                     -> io::Result<Option<usize>> {
+        self.sys.recv(buf).map_non_block()
+    }
+
+    /// Connects the UDP socket setting the default destination for `send()` 
+    /// and limiting packets that are read via `recv` from the address specified
+    /// in `addr`.
+    pub fn connect(&self, addr: SocketAddr)
+                 -> io::Result<()> {
+        self.sys.connect(addr)
+    }
+
+    /// Gets the value of the `SO_BROADCAST` option for this socket.
+    ///
+    /// For more information about this option, see
+    /// [`set_broadcast`][link].
+    ///
+    /// [link]: #method.set_broadcast
+    pub fn broadcast(&self) -> io::Result<bool> {
+        self.sys.broadcast()
+    }
+
+    /// Sets the value of the `SO_BROADCAST` option for this socket.
+    ///
+    /// When enabled, this socket is allowed to send packets to a broadcast
+    /// address.
+    pub fn set_broadcast(&self, on: bool) -> io::Result<()> {
+        self.sys.set_broadcast(on)
+    }
+
+    /// Gets the value of the `IP_MULTICAST_LOOP` option for this socket.
+    ///
+    /// For more information about this option, see
+    /// [`set_multicast_loop_v4`][link].
+    ///
+    /// [link]: #method.set_multicast_loop_v4
+    pub fn multicast_loop_v4(&self) -> io::Result<bool> {
+        self.sys.multicast_loop_v4()
+    }
+
+    /// Sets the value of the `IP_MULTICAST_LOOP` option for this socket.
+    ///
+    /// If enabled, multicast packets will be looped back to the local socket.
+    /// Note that this may not have any affect on IPv6 sockets.
+    pub fn set_multicast_loop_v4(&self, on: bool) -> io::Result<()> {
+        self.sys.set_multicast_loop_v4(on)
+    }
+
+    /// Gets the value of the `IP_MULTICAST_TTL` option for this socket.
+    ///
+    /// For more information about this option, see
+    /// [`set_multicast_ttl_v4`][link].
+    ///
+    /// [link]: #method.set_multicast_ttl_v4
+    pub fn multicast_ttl_v4(&self) -> io::Result<u32> {
+        self.sys.multicast_ttl_v4()
+    }
+
+    /// Sets the value of the `IP_MULTICAST_TTL` option for this socket.
+    ///
+    /// Indicates the time-to-live value of outgoing multicast packets for
+    /// this socket. The default value is 1 which means that multicast packets
+    /// don't leave the local network unless explicitly requested.
+    ///
+    /// Note that this may not have any affect on IPv6 sockets.
+    pub fn set_multicast_ttl_v4(&self, ttl: u32) -> io::Result<()> {
+        self.sys.set_multicast_ttl_v4(ttl)
+    }
+
+    /// Gets the value of the `IPV6_MULTICAST_LOOP` option for this socket.
+    ///
+    /// For more information about this option, see
+    /// [`set_multicast_loop_v6`][link].
+    ///
+    /// [link]: #method.set_multicast_loop_v6
+    pub fn multicast_loop_v6(&self) -> io::Result<bool> {
+        self.sys.multicast_loop_v6()
+    }
+
+    /// Sets the value of the `IPV6_MULTICAST_LOOP` option for this socket.
+    ///
+    /// Controls whether this socket sees the multicast packets it sends itself.
+    /// Note that this may not have any affect on IPv4 sockets.
+    pub fn set_multicast_loop_v6(&self, on: bool) -> io::Result<()> {
+        self.sys.set_multicast_loop_v6(on)
+    }
+
+    /// Gets the value of the `IP_TTL` option for this socket.
+    ///
+    /// For more information about this option, see [`set_ttl`][link].
+    ///
+    /// [link]: #method.set_ttl
+    pub fn ttl(&self) -> io::Result<u32> {
+        self.sys.ttl()
+    }
+
+    /// Sets the value for the `IP_TTL` option on this socket.
+    ///
+    /// This value sets the time-to-live field that is used in every packet sent
+    /// from this socket.
+    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
+        self.sys.set_ttl(ttl)
+    }
+
+    /// Executes an operation of the `IP_ADD_MEMBERSHIP` type.
+    ///
+    /// This function specifies a new multicast group for this socket to join.
+    /// The address must be a valid multicast address, and `interface` is the
+    /// address of the local interface with which the system should join the
+    /// multicast group. If it's equal to `INADDR_ANY` then an appropriate
+    /// interface is chosen by the system.
+    pub fn join_multicast_v4(&self,
+                             multiaddr: &Ipv4Addr,
+                             interface: &Ipv4Addr) -> io::Result<()> {
+        self.sys.join_multicast_v4(multiaddr, interface)
+    }
+
+    /// Executes an operation of the `IPV6_ADD_MEMBERSHIP` type.
+    ///
+    /// This function specifies a new multicast group for this socket to join.
+    /// The address must be a valid multicast address, and `interface` is the
+    /// index of the interface to join/leave (or 0 to indicate any interface).
+    pub fn join_multicast_v6(&self,
+                             multiaddr: &Ipv6Addr,
+                             interface: u32) -> io::Result<()> {
+        self.sys.join_multicast_v6(multiaddr, interface)
+    }
+
+    /// Executes an operation of the `IP_DROP_MEMBERSHIP` type.
+    ///
+    /// For more information about this option, see
+    /// [`join_multicast_v4`][link].
+    ///
+    /// [link]: #method.join_multicast_v4
+    pub fn leave_multicast_v4(&self,
+                              multiaddr: &Ipv4Addr,
+                              interface: &Ipv4Addr) -> io::Result<()> {
+        self.sys.leave_multicast_v4(multiaddr, interface)
+    }
+
+    /// Executes an operation of the `IPV6_DROP_MEMBERSHIP` type.
+    ///
+    /// For more information about this option, see
+    /// [`join_multicast_v6`][link].
+    ///
+    /// [link]: #method.join_multicast_v6
+    pub fn leave_multicast_v6(&self,
+                              multiaddr: &Ipv6Addr,
+                              interface: u32) -> io::Result<()> {
+        self.sys.leave_multicast_v6(multiaddr, interface)
+    }
+
+    /// Get the value of the `SO_ERROR` option on this socket.
+    ///
+    /// This will retrieve the stored error in the underlying socket, clearing
+    /// the field in the process. This can be useful for checking errors between
+    /// calls.
+    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+        self.sys.take_error()
+    }
+}
+
+impl Evented for UdpSocket {
+    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
+        self.selector_id.associate_selector(poll)?;
+        self.sys.register(poll, token, interest, opts)
+    }
+
+    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
+        self.sys.reregister(poll, token, interest, opts)
+    }
+
+    fn deregister(&self, poll: &Poll) -> io::Result<()> {
+        self.sys.deregister(poll)
+    }
+}
+
+/*
+ *
+ * ===== UNIX ext =====
+ *
+ */
+
+#[cfg(all(unix, not(target_os = "fuchsia")))]
+use std::os::unix::io::{IntoRawFd, AsRawFd, FromRawFd, RawFd};
+
+#[cfg(all(unix, not(target_os = "fuchsia")))]
+impl IntoRawFd for UdpSocket {
+    fn into_raw_fd(self) -> RawFd {
+        self.sys.into_raw_fd()
+    }
+}
+
+#[cfg(all(unix, not(target_os = "fuchsia")))]
+impl AsRawFd for UdpSocket {
+    fn as_raw_fd(&self) -> RawFd {
+        self.sys.as_raw_fd()
+    }
+}
+
+#[cfg(all(unix, not(target_os = "fuchsia")))]
+impl FromRawFd for UdpSocket {
+    unsafe fn from_raw_fd(fd: RawFd) -> UdpSocket {
+        UdpSocket {
+            sys: FromRawFd::from_raw_fd(fd),
+            selector_id: SelectorId::new(),
+        }
+    }
+}