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diff --git a/third_party/rust/socket2/src/lib.rs b/third_party/rust/socket2/src/lib.rs
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+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Utilities for handling sockets
+//!
+//! This crate is sort of an evolution of the `net2` crate after seeing the
+//! issues on it over time. The intention of this crate is to provide as direct
+//! as possible access to the system's functionality for sockets as possible. No
+//! extra fluff (e.g. multiple syscalls or builders) provided in this crate. As
+//! a result using this crate can be a little wordy, but it should give you
+//! maximal flexibility over configuration of sockets.
+//!
+//! # Examples
+//!
+//! ```no_run
+//! use std::net::SocketAddr;
+//! use socket2::{Socket, Domain, Type};
+//!
+//! // create a TCP listener bound to two addresses
+//! let socket = Socket::new(Domain::ipv6(), Type::stream(), None).unwrap();
+//!
+//! socket.bind(&"[::1]:12345".parse::<SocketAddr>().unwrap().into()).unwrap();
+//! socket.set_only_v6(false);
+//! socket.listen(128).unwrap();
+//!
+//! let listener = socket.into_tcp_listener();
+//! // ...
+//! ```
+
+#![doc(html_root_url = "https://docs.rs/socket2/0.3")]
+#![deny(missing_docs)]
+
+use crate::utils::NetInt;
+
+#[cfg(any(unix, target_os = "redox"))]
+use libc::{sockaddr_storage, socklen_t};
+#[cfg(windows)]
+use winapi::shared::ws2def::SOCKADDR_STORAGE as sockaddr_storage;
+#[cfg(windows)]
+use winapi::um::ws2tcpip::socklen_t;
+
+mod sockaddr;
+mod socket;
+mod utils;
+
+#[cfg(unix)]
+#[path = "sys/unix.rs"]
+mod sys;
+#[cfg(windows)]
+#[path = "sys/windows.rs"]
+mod sys;
+#[cfg(target_os = "redox")]
+#[path = "sys/redox/mod.rs"]
+mod sys;
+
+/// Newtype, owned, wrapper around a system socket.
+///
+/// This type simply wraps an instance of a file descriptor (`c_int`) on Unix
+/// and an instance of `SOCKET` on Windows. This is the main type exported by
+/// this crate and is intended to mirror the raw semantics of sockets on
+/// platforms as closely as possible. Almost all methods correspond to
+/// precisely one libc or OS API call which is essentially just a "Rustic
+/// translation" of what's below.
+///
+/// # Examples
+///
+/// ```no_run
+/// use std::net::SocketAddr;
+/// use socket2::{Socket, Domain, Type, SockAddr};
+///
+/// // create a TCP listener bound to two addresses
+/// let socket = Socket::new(Domain::ipv4(), Type::stream(), None).unwrap();
+///
+/// socket.bind(&"127.0.0.1:12345".parse::<SocketAddr>().unwrap().into()).unwrap();
+/// socket.bind(&"127.0.0.1:12346".parse::<SocketAddr>().unwrap().into()).unwrap();
+/// socket.listen(128).unwrap();
+///
+/// let listener = socket.into_tcp_listener();
+/// // ...
+/// ```
+pub struct Socket {
+    inner: sys::Socket,
+}
+
+/// The address of a socket.
+///
+/// `SockAddr`s may be constructed directly to and from the standard library
+/// `SocketAddr`, `SocketAddrV4`, and `SocketAddrV6` types.
+pub struct SockAddr {
+    storage: sockaddr_storage,
+    len: socklen_t,
+}
+
+/// Specification of the communication domain for a socket.
+///
+/// This is a newtype wrapper around an integer which provides a nicer API in
+/// addition to an injection point for documentation. Convenience constructors
+/// such as `Domain::ipv4`, `Domain::ipv6`, etc, are provided to avoid reaching
+/// into libc for various constants.
+///
+/// This type is freely interconvertible with the `i32` type, however, if a raw
+/// value needs to be provided.
+#[derive(Copy, Clone)]
+pub struct Domain(i32);
+
+/// Specification of communication semantics on a socket.
+///
+/// This is a newtype wrapper around an integer which provides a nicer API in
+/// addition to an injection point for documentation. Convenience constructors
+/// such as `Type::stream`, `Type::dgram`, etc, are provided to avoid reaching
+/// into libc for various constants.
+///
+/// This type is freely interconvertible with the `i32` type, however, if a raw
+/// value needs to be provided.
+#[derive(Copy, Clone)]
+pub struct Type(i32);
+
+/// Protocol specification used for creating sockets via `Socket::new`.
+///
+/// This is a newtype wrapper around an integer which provides a nicer API in
+/// addition to an injection point for documentation.
+///
+/// This type is freely interconvertible with the `i32` type, however, if a raw
+/// value needs to be provided.
+#[derive(Copy, Clone)]
+pub struct Protocol(i32);
+
+fn hton<I: NetInt>(i: I) -> I {
+    i.to_be()
+}
+
+#[cfg(not(target_os = "redox"))]
+fn ntoh<I: NetInt>(i: I) -> I {
+    I::from_be(i)
+}