1 files changed, 425 insertions, 0 deletions
diff --git a/third_party/rust/tokio-udp/src/socket.rs b/third_party/rust/tokio-udp/src/socket.rs
new file mode 100644
index 0000000000..aaf6b8f726
--- /dev/null
+++ b/third_party/rust/tokio-udp/src/socket.rs
@@ -0,0 +1,425 @@
+use super::{SendDgram, RecvDgram};
+
+use std::io;
+use std::net::{self, SocketAddr, Ipv4Addr, Ipv6Addr};
+use std::fmt;
+
+use futures::{Async, Poll};
+use mio;
+
+use tokio_reactor::{Handle, PollEvented};
+
+/// An I/O object representing a UDP socket.
+pub struct UdpSocket {
+    io: PollEvented<mio::net::UdpSocket>,
+}
+
+impl UdpSocket {
+    /// This function will create a new UDP socket and attempt to bind it to
+    /// the `addr` provided.
+    pub fn bind(addr: &SocketAddr) -> io::Result<UdpSocket> {
+        mio::net::UdpSocket::bind(addr)
+            .map(UdpSocket::new)
+    }
+
+    fn new(socket: mio::net::UdpSocket) -> UdpSocket {
+        let io = PollEvented::new(socket);
+        UdpSocket { io: io }
+    }
+
+    /// Creates a new `UdpSocket` from the previously bound socket provided.
+    ///
+    /// The socket given will be registered with the event loop that `handle`
+    /// is associated with. This function requires that `socket` has previously
+    /// been bound to an address to work correctly.
+    ///
+    /// This can be used in conjunction with net2's `UdpBuilder` interface to
+    /// configure a socket before it's handed off, such as setting options like
+    /// `reuse_address` or binding to multiple addresses.
+    ///
+    /// Use `Handle::default()` to lazily bind to an event loop, just like `bind` does.
+    pub fn from_std(socket: net::UdpSocket,
+                    handle: &Handle) -> io::Result<UdpSocket> {
+        let io = mio::net::UdpSocket::from_socket(socket)?;
+        let io = PollEvented::new_with_handle(io, handle)?;
+        Ok(UdpSocket { io })
+    }
+
+    /// Returns the local address that this socket is bound to.
+    pub fn local_addr(&self) -> io::Result<SocketAddr> {
+        self.io.get_ref().local_addr()
+    }
+
+    /// 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.io.get_ref().connect(*addr)
+    }
+
+    #[deprecated(since = "0.1.2", note = "use poll_send instead")]
+    #[doc(hidden)]
+    pub fn send(&mut self, buf: &[u8]) -> io::Result<usize> {
+        match self.poll_send(buf)? {
+            Async::Ready(n) => Ok(n),
+            Async::NotReady => Err(io::ErrorKind::WouldBlock.into()),
+        }
+    }
+
+    /// Sends data on the socket to the remote address to which it is connected.
+    ///
+    /// The [`connect`] method will connect this socket to a remote address. This
+    /// method will fail if the socket is not connected.
+    ///
+    /// [`connect`]: #method.connect
+    ///
+    /// # Return
+    ///
+    /// On success, returns `Ok(Async::Ready(num_bytes_written))`.
+    ///
+    /// If the socket is not ready for writing, the method returns
+    /// `Ok(Async::NotReady)` and arranges for the current task to receive a
+    /// notification when the socket becomes writable.
+    ///
+    /// # Panics
+    ///
+    /// This function will panic if called from outside of a task context.
+    pub fn poll_send(&mut self, buf: &[u8]) -> Poll<usize, io::Error> {
+        try_ready!(self.io.poll_write_ready());
+
+        match self.io.get_ref().send(buf) {
+            Ok(n) => Ok(n.into()),
+            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
+                self.io.clear_write_ready()?;
+                Ok(Async::NotReady)
+            }
+            Err(e) => Err(e),
+        }
+    }
+
+    #[deprecated(since = "0.1.2", note = "use poll_recv instead")]
+    #[doc(hidden)]
+    pub fn recv(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        match self.poll_recv(buf)? {
+            Async::Ready(n) => Ok(n),
+            Async::NotReady => Err(io::ErrorKind::WouldBlock.into()),
+        }
+    }
+
+    /// Receives a single datagram message on the socket from the remote address to
+    /// which it is connected. 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 [`connect`] method will connect this socket to a remote address. This
+    /// method will fail if the socket is not connected.
+    ///
+    /// [`connect`]: #method.connect
+    ///
+    /// # Return
+    ///
+    /// On success, returns `Ok(Async::Ready(num_bytes_read))`.
+    ///
+    /// If no data is available for reading, the method returns
+    /// `Ok(Async::NotReady)` and arranges for the current task to receive a
+    /// notification when the socket becomes receivable or is closed.
+    ///
+    /// # Panics
+    ///
+    /// This function will panic if called from outside of a task context.
+    pub fn poll_recv(&mut self, buf: &mut [u8]) -> Poll<usize, io::Error> {
+        try_ready!(self.io.poll_read_ready(mio::Ready::readable()));
+
+        match self.io.get_ref().recv(buf) {
+            Ok(n) => Ok(n.into()),
+            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
+                self.io.clear_read_ready(mio::Ready::readable())?;
+                Ok(Async::NotReady)
+            }
+            Err(e) => Err(e),
+        }
+    }
+
+    #[deprecated(since = "0.1.2", note = "use poll_send_to instead")]
+    #[doc(hidden)]
+    pub fn send_to(&mut self, buf: &[u8], target: &SocketAddr) -> io::Result<usize> {
+        match self.poll_send_to(buf, target)? {
+            Async::Ready(n) => Ok(n),
+            Async::NotReady => Err(io::ErrorKind::WouldBlock.into()),
+        }
+    }
+
+    /// Sends data on the socket to the given address. On success, returns the
+    /// number of bytes written.
+    ///
+    /// This will return an error when the IP version of the local socket
+    /// does not match that of `target`.
+    ///
+    /// # Return
+    ///
+    /// On success, returns `Ok(Async::Ready(num_bytes_written))`.
+    ///
+    /// If the socket is not ready for writing, the method returns
+    /// `Ok(Async::NotReady)` and arranges for the current task to receive a
+    /// notification when the socket becomes writable.
+    ///
+    /// # Panics
+    ///
+    /// This function will panic if called from outside of a task context.
+    pub fn poll_send_to(&mut self, buf: &[u8], target: &SocketAddr) -> Poll<usize, io::Error> {
+        try_ready!(self.io.poll_write_ready());
+
+        match self.io.get_ref().send_to(buf, target) {
+            Ok(n) => Ok(n.into()),
+            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
+                self.io.clear_write_ready()?;
+                Ok(Async::NotReady)
+            }
+            Err(e) => Err(e),
+        }
+    }
+
+    /// Creates a future that will write the entire contents of the buffer
+    /// `buf` provided as a datagram to this socket.
+    ///
+    /// The returned future will return after data has been written to the
+    /// outbound socket. The future will resolve to the stream as well as the
+    /// buffer (for reuse if needed).
+    ///
+    /// Any error which happens during writing will cause both the stream and
+    /// the buffer to get destroyed. Note that failure to write the entire
+    /// buffer is considered an error for the purposes of sending a datagram.
+    ///
+    /// The `buf` parameter here only requires the `AsRef<[u8]>` trait, which
+    /// should be broadly applicable to accepting data which can be converted
+    /// to a slice.
+    pub fn send_dgram<T>(self, buf: T, addr: &SocketAddr) -> SendDgram<T>
+        where T: AsRef<[u8]>,
+    {
+        SendDgram::new(self, buf, *addr)
+    }
+
+    #[deprecated(since = "0.1.2", note = "use poll_recv_from instead")]
+    #[doc(hidden)]
+    pub fn recv_from(&mut self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
+        match self.poll_recv_from(buf)? {
+            Async::Ready(ret) => Ok(ret),
+            Async::NotReady => Err(io::ErrorKind::WouldBlock.into()),
+        }
+    }
+
+    /// Receives data from the socket. On success, returns the number of bytes
+    /// read and the address from whence the data came.
+    ///
+    /// # Panics
+    ///
+    /// This function will panic if called outside the context of a future's
+    /// task.
+    pub fn poll_recv_from(&mut self, buf: &mut [u8]) -> Poll<(usize, SocketAddr), io::Error> {
+        try_ready!(self.io.poll_read_ready(mio::Ready::readable()));
+
+        match self.io.get_ref().recv_from(buf) {
+            Ok(n) => Ok(n.into()),
+            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
+                self.io.clear_read_ready(mio::Ready::readable())?;
+                Ok(Async::NotReady)
+            }
+            Err(e) => Err(e),
+        }
+    }
+
+    /// Creates a future that receive a datagram to be written to the buffer
+    /// provided.
+    ///
+    /// The returned future will return after a datagram has been received on
+    /// this socket. The future will resolve to the socket, the buffer, the
+    /// amount of data read, and the address the data was received from.
+    ///
+    /// An error during reading will cause the socket and buffer to get
+    /// destroyed.
+    ///
+    /// The `buf` parameter here only requires the `AsMut<[u8]>` trait, which
+    /// should be broadly applicable to accepting data which can be converted
+    /// to a slice.
+    pub fn recv_dgram<T>(self, buf: T) -> RecvDgram<T>
+        where T: AsMut<[u8]>,
+    {
+        RecvDgram::new(self, buf)
+    }
+
+    /// Gets the value of the `SO_BROADCAST` option for this socket.
+    ///
+    /// For more information about this option, see [`set_broadcast`].
+    ///
+    /// [`set_broadcast`]: #method.set_broadcast
+    pub fn broadcast(&self) -> io::Result<bool> {
+        self.io.get_ref().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.io.get_ref().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`].
+    ///
+    /// [`set_multicast_loop_v4`]: #method.set_multicast_loop_v4
+    pub fn multicast_loop_v4(&self) -> io::Result<bool> {
+        self.io.get_ref().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
+    ///
+    /// This may not have any affect on IPv6 sockets.
+    pub fn set_multicast_loop_v4(&self, on: bool) -> io::Result<()> {
+        self.io.get_ref().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`].
+    ///
+    /// [`set_multicast_ttl_v4`]: #method.set_multicast_ttl_v4
+    pub fn multicast_ttl_v4(&self) -> io::Result<u32> {
+        self.io.get_ref().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
+    ///
+    /// This may not have any affect on IPv6 sockets.
+    pub fn set_multicast_ttl_v4(&self, ttl: u32) -> io::Result<()> {
+        self.io.get_ref().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`].
+    ///
+    /// [`set_multicast_loop_v6`]: #method.set_multicast_loop_v6
+    pub fn multicast_loop_v6(&self) -> io::Result<bool> {
+        self.io.get_ref().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
+    ///
+    /// This may not have any affect on IPv4 sockets.
+    pub fn set_multicast_loop_v6(&self, on: bool) -> io::Result<()> {
+        self.io.get_ref().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`].
+    ///
+    /// [`set_ttl`]: #method.set_ttl
+    pub fn ttl(&self) -> io::Result<u32> {
+        self.io.get_ref().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.io.get_ref().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.io.get_ref().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.io.get_ref().join_multicast_v6(multiaddr, interface)
+    }
+
+    /// Executes an operation of the `IP_DROP_MEMBERSHIP` type.
+    ///
+    /// For more information about this option, see [`join_multicast_v4`].
+    ///
+    /// [`join_multicast_v4`]: #method.join_multicast_v4
+    pub fn leave_multicast_v4(&self,
+                              multiaddr: &Ipv4Addr,
+                              interface: &Ipv4Addr) -> io::Result<()> {
+        self.io.get_ref().leave_multicast_v4(multiaddr, interface)
+    }
+
+    /// Executes an operation of the `IPV6_DROP_MEMBERSHIP` type.
+    ///
+    /// For more information about this option, see [`join_multicast_v6`].
+    ///
+    /// [`join_multicast_v6`]: #method.join_multicast_v6
+    pub fn leave_multicast_v6(&self,
+                              multiaddr: &Ipv6Addr,
+                              interface: u32) -> io::Result<()> {
+        self.io.get_ref().leave_multicast_v6(multiaddr, interface)
+    }
+}
+
+impl fmt::Debug for UdpSocket {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        self.io.get_ref().fmt(f)
+    }
+}
+
+#[cfg(all(unix))]
+mod sys {
+    use std::os::unix::prelude::*;
+    use super::UdpSocket;
+
+    impl AsRawFd for UdpSocket {
+        fn as_raw_fd(&self) -> RawFd {
+            self.io.get_ref().as_raw_fd()
+        }
+    }
+}
+
+#[cfg(windows)]
+mod sys {
+    // TODO: let's land these upstream with mio and then we can add them here.
+    //
+    // use std::os::windows::prelude::*;
+    // use super::UdpSocket;
+    //
+    // impl AsRawHandle for UdpSocket {
+    //     fn as_raw_handle(&self) -> RawHandle {
+    //         self.io.get_ref().as_raw_handle()
+    //     }
+    // }
+}