<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `/home/mrh/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.6.19/src/net/tcp.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>tcp.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script src="../../../storage.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="shortcut icon" href="../../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">&#9776;</div><a href='../../../mio/index.html'><div class='logo-container'><img src='../../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../../settings.html"><img src="../../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1">  1</span>
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</pre><div class="example-wrap"><pre class="rust ">
<span class="doccomment">//! Primitives for working with TCP</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! The types provided in this module are non-blocking by default and are</span>
<span class="doccomment">//! designed to be portable across all supported Mio platforms. As long as the</span>
<span class="doccomment">//! [portability guidelines] are followed, the behavior should be identical no</span>
<span class="doccomment">//! matter the target platform.</span>
<span class="doccomment">//!</span>
<span class="doccomment">/// [portability guidelines]: ../struct.Poll.html#portability</span>

<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::{<span class="ident">Read</span>, <span class="ident">Write</span>};
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">net</span>::{<span class="self">self</span>, <span class="ident">SocketAddr</span>, <span class="ident">SocketAddrV4</span>, <span class="ident">SocketAddrV6</span>, <span class="ident">Ipv4Addr</span>, <span class="ident">Ipv6Addr</span>};
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">time</span>::<span class="ident">Duration</span>;

<span class="kw">use</span> <span class="ident">net2</span>::<span class="ident">TcpBuilder</span>;
<span class="kw">use</span> <span class="ident">iovec</span>::<span class="ident">IoVec</span>;

<span class="kw">use</span> {<span class="ident">io</span>, <span class="ident">sys</span>, <span class="ident">Ready</span>, <span class="ident">Poll</span>, <span class="ident">PollOpt</span>, <span class="ident">Token</span>};
<span class="kw">use</span> <span class="ident">event</span>::<span class="ident">Evented</span>;
<span class="kw">use</span> <span class="ident">poll</span>::<span class="ident">SelectorId</span>;

<span class="comment">/*
 *
 * ===== TcpStream =====
 *
 */</span>

<span class="doccomment">/// A non-blocking TCP stream between a local socket and a remote socket.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The socket will be closed when the value is dropped.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// # use std::net::TcpListener;</span>
<span class="doccomment">/// # use std::error::Error;</span>
<span class="doccomment">/// #</span>
<span class="doccomment">/// # fn try_main() -&gt; Result&lt;(), Box&lt;Error&gt;&gt; {</span>
<span class="doccomment">/// #     let _listener = TcpListener::bind(&quot;127.0.0.1:34254&quot;)?;</span>
<span class="doccomment">/// use mio::{Events, Ready, Poll, PollOpt, Token};</span>
<span class="doccomment">/// use mio::net::TcpStream;</span>
<span class="doccomment">/// use std::time::Duration;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let stream = TcpStream::connect(&amp;&quot;127.0.0.1:34254&quot;.parse()?)?;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let poll = Poll::new()?;</span>
<span class="doccomment">/// let mut events = Events::with_capacity(128);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Register the socket with `Poll`</span>
<span class="doccomment">/// poll.register(&amp;stream, Token(0), Ready::writable(),</span>
<span class="doccomment">///               PollOpt::edge())?;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// poll.poll(&amp;mut events, Some(Duration::from_millis(100)))?;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // The socket might be ready at this point</span>
<span class="doccomment">/// #     Ok(())</span>
<span class="doccomment">/// # }</span>
<span class="doccomment">/// #</span>
<span class="doccomment">/// # fn main() {</span>
<span class="doccomment">/// #     try_main().unwrap();</span>
<span class="doccomment">/// # }</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">TcpStream</span> {
    <span class="ident">sys</span>: <span class="ident">sys</span>::<span class="ident">TcpStream</span>,
    <span class="ident">selector_id</span>: <span class="ident">SelectorId</span>,
}

<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">net</span>::<span class="ident">Shutdown</span>;

<span class="comment">// TODO: remove when fuchsia&#39;s set_nonblocking is fixed in libstd</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;fuchsia&quot;</span>)]</span>
<span class="kw">fn</span> <span class="ident">set_nonblocking</span>(<span class="ident">stream</span>: <span class="kw-2">&amp;</span><span class="ident">net</span>::<span class="ident">TcpStream</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
    <span class="ident">sys</span>::<span class="ident">set_nonblock</span>(
        ::<span class="ident">std</span>::<span class="ident">os</span>::<span class="ident">unix</span>::<span class="ident">io</span>::<span class="ident">AsRawFd</span>::<span class="ident">as_raw_fd</span>(<span class="ident">stream</span>))
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;fuchsia&quot;</span>))]</span>
<span class="kw">fn</span> <span class="ident">set_nonblocking</span>(<span class="ident">stream</span>: <span class="kw-2">&amp;</span><span class="ident">net</span>::<span class="ident">TcpStream</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
    <span class="ident">stream</span>.<span class="ident">set_nonblocking</span>(<span class="bool-val">true</span>)
}


<span class="kw">impl</span> <span class="ident">TcpStream</span> {
    <span class="doccomment">/// Create a new TCP stream and issue a non-blocking connect to the</span>
    <span class="doccomment">/// specified address.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This convenience method is available and uses the system&#39;s default</span>
    <span class="doccomment">/// options when creating a socket which is then connected. If fine-grained</span>
    <span class="doccomment">/// control over the creation of the socket is desired, you can use</span>
    <span class="doccomment">/// `net2::TcpBuilder` to configure a socket and then pass its socket to</span>
    <span class="doccomment">/// `TcpStream::connect_stream` to transfer ownership into mio and schedule</span>
    <span class="doccomment">/// the connect operation.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">connect</span>(<span class="ident">addr</span>: <span class="kw-2">&amp;</span><span class="ident">SocketAddr</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">TcpStream</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="ident">sock</span> <span class="op">=</span> <span class="kw">match</span> <span class="kw-2">*</span><span class="ident">addr</span> {
            <span class="ident">SocketAddr</span>::<span class="ident">V4</span>(..) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">TcpBuilder</span>::<span class="ident">new_v4</span>(),
            <span class="ident">SocketAddr</span>::<span class="ident">V6</span>(..) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">TcpBuilder</span>::<span class="ident">new_v6</span>(),
        }<span class="question-mark">?</span>;
        <span class="comment">// Required on Windows for a future `connect_overlapped` operation to be</span>
        <span class="comment">// executed successfully.</span>
        <span class="kw">if</span> <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">windows</span>) {
            <span class="ident">sock</span>.<span class="ident">bind</span>(<span class="kw-2">&amp;</span><span class="ident">inaddr_any</span>(<span class="ident">addr</span>))<span class="question-mark">?</span>;
        }
        <span class="ident">TcpStream</span>::<span class="ident">connect_stream</span>(<span class="ident">sock</span>.<span class="ident">to_tcp_stream</span>()<span class="question-mark">?</span>, <span class="ident">addr</span>)
    }

    <span class="doccomment">/// Creates a new `TcpStream` from the pending socket inside the given</span>
    <span class="doccomment">/// `std::net::TcpBuilder`, connecting it to the address specified.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This constructor allows configuring the socket before it&#39;s actually</span>
    <span class="doccomment">/// connected, and this function will transfer ownership to the returned</span>
    <span class="doccomment">/// `TcpStream` if successful. An unconnected `TcpStream` can be created</span>
    <span class="doccomment">/// with the `net2::TcpBuilder` type (and also configured via that route).</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// The platform specific behavior of this function looks like:</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// * On Unix, the socket is placed into nonblocking mode and then a</span>
    <span class="doccomment">///   `connect` call is issued.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// * On Windows, the address is stored internally and the connect operation</span>
    <span class="doccomment">///   is issued when the returned `TcpStream` is registered with an event</span>
    <span class="doccomment">///   loop. Note that on Windows you must `bind` a socket before it can be</span>
    <span class="doccomment">///   connected, so if a custom `TcpBuilder` is used it should be bound</span>
    <span class="doccomment">///   (perhaps to `INADDR_ANY`) before this method is called.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">connect_stream</span>(<span class="ident">stream</span>: <span class="ident">net</span>::<span class="ident">TcpStream</span>,
                          <span class="ident">addr</span>: <span class="kw-2">&amp;</span><span class="ident">SocketAddr</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">TcpStream</span><span class="op">&gt;</span> {
        <span class="prelude-val">Ok</span>(<span class="ident">TcpStream</span> {
            <span class="ident">sys</span>: <span class="ident">sys</span>::<span class="ident">TcpStream</span>::<span class="ident">connect</span>(<span class="ident">stream</span>, <span class="ident">addr</span>)<span class="question-mark">?</span>,
            <span class="ident">selector_id</span>: <span class="ident">SelectorId</span>::<span class="ident">new</span>(),
        })
    }

    <span class="doccomment">/// Creates a new `TcpStream` from a standard `net::TcpStream`.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This function is intended to be used to wrap a TCP stream from the</span>
    <span class="doccomment">/// standard library in the mio equivalent. The conversion here will</span>
    <span class="doccomment">/// automatically set `stream` to nonblocking and the returned object should</span>
    <span class="doccomment">/// be ready to get associated with an event loop.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// Note that the TCP stream here will not have `connect` called on it, so</span>
    <span class="doccomment">/// it should already be connected via some other means (be it manually, the</span>
    <span class="doccomment">/// net2 crate, or the standard library).</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_stream</span>(<span class="ident">stream</span>: <span class="ident">net</span>::<span class="ident">TcpStream</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">TcpStream</span><span class="op">&gt;</span> {
        <span class="ident">set_nonblocking</span>(<span class="kw-2">&amp;</span><span class="ident">stream</span>)<span class="question-mark">?</span>;

        <span class="prelude-val">Ok</span>(<span class="ident">TcpStream</span> {
            <span class="ident">sys</span>: <span class="ident">sys</span>::<span class="ident">TcpStream</span>::<span class="ident">from_stream</span>(<span class="ident">stream</span>),
            <span class="ident">selector_id</span>: <span class="ident">SelectorId</span>::<span class="ident">new</span>(),
        })
    }

    <span class="doccomment">/// Returns the socket address of the remote peer of this TCP connection.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">peer_addr</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">SocketAddr</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">peer_addr</span>()
    }

    <span class="doccomment">/// Returns the socket address of the local half of this TCP connection.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">local_addr</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">SocketAddr</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">local_addr</span>()
    }

    <span class="doccomment">/// Creates a new independently owned handle to the underlying socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// The returned `TcpStream` is a reference to the same stream that this</span>
    <span class="doccomment">/// object references. Both handles will read and write the same stream of</span>
    <span class="doccomment">/// data, and options set on one stream will be propagated to the other</span>
    <span class="doccomment">/// stream.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">try_clone</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">TcpStream</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">try_clone</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
            <span class="ident">TcpStream</span> {
                <span class="ident">sys</span>: <span class="ident">s</span>,
                <span class="ident">selector_id</span>: <span class="self">self</span>.<span class="ident">selector_id</span>.<span class="ident">clone</span>(),
            }
        })
    }

    <span class="doccomment">/// Shuts down the read, write, or both halves of this connection.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This function will cause all pending and future I/O on the specified</span>
    <span class="doccomment">/// portions to return immediately with an appropriate value (see the</span>
    <span class="doccomment">/// documentation of `Shutdown`).</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">shutdown</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">how</span>: <span class="ident">Shutdown</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">shutdown</span>(<span class="ident">how</span>)
    }

    <span class="doccomment">/// Sets the value of the `TCP_NODELAY` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// If set, this option disables the Nagle algorithm. This means that</span>
    <span class="doccomment">/// segments are always sent as soon as possible, even if there is only a</span>
    <span class="doccomment">/// small amount of data. When not set, data is buffered until there is a</span>
    <span class="doccomment">/// sufficient amount to send out, thereby avoiding the frequent sending of</span>
    <span class="doccomment">/// small packets.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_nodelay</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">nodelay</span>: <span class="ident">bool</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">set_nodelay</span>(<span class="ident">nodelay</span>)
    }

    <span class="doccomment">/// Gets the value of the `TCP_NODELAY` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// For more information about this option, see [`set_nodelay`][link].</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [link]: #method.set_nodelay</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">nodelay</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">bool</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">nodelay</span>()
    }

    <span class="doccomment">/// Sets the value of the `SO_RCVBUF` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// Changes the size of the operating system&#39;s receive buffer associated</span>
    <span class="doccomment">/// with the socket.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_recv_buffer_size</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">size</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">set_recv_buffer_size</span>(<span class="ident">size</span>)
    }

    <span class="doccomment">/// Gets the value of the `SO_RCVBUF` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// For more information about this option, see</span>
    <span class="doccomment">/// [`set_recv_buffer_size`][link].</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [link]: #method.set_recv_buffer_size</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">recv_buffer_size</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">recv_buffer_size</span>()
    }

    <span class="doccomment">/// Sets the value of the `SO_SNDBUF` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// Changes the size of the operating system&#39;s send buffer associated with</span>
    <span class="doccomment">/// the socket.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_send_buffer_size</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">size</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">set_send_buffer_size</span>(<span class="ident">size</span>)
    }

    <span class="doccomment">/// Gets the value of the `SO_SNDBUF` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// For more information about this option, see</span>
    <span class="doccomment">/// [`set_send_buffer_size`][link].</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [link]: #method.set_send_buffer_size</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">send_buffer_size</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">send_buffer_size</span>()
    }

    <span class="doccomment">/// Sets whether keepalive messages are enabled to be sent on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// On Unix, this option will set the `SO_KEEPALIVE` as well as the</span>
    <span class="doccomment">/// `TCP_KEEPALIVE` or `TCP_KEEPIDLE` option (depending on your platform).</span>
    <span class="doccomment">/// On Windows, this will set the `SIO_KEEPALIVE_VALS` option.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// If `None` is specified then keepalive messages are disabled, otherwise</span>
    <span class="doccomment">/// the duration specified will be the time to remain idle before sending a</span>
    <span class="doccomment">/// TCP keepalive probe.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// Some platforms specify this value in seconds, so sub-second</span>
    <span class="doccomment">/// specifications may be omitted.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_keepalive</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">keepalive</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Duration</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">set_keepalive</span>(<span class="ident">keepalive</span>)
    }

    <span class="doccomment">/// Returns whether keepalive messages are enabled on this socket, and if so</span>
    <span class="doccomment">/// the duration of time between them.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// For more information about this option, see [`set_keepalive`][link].</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [link]: #method.set_keepalive</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">keepalive</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Duration</span><span class="op">&gt;</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">keepalive</span>()
    }

    <span class="doccomment">/// Sets the value for the `IP_TTL` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This value sets the time-to-live field that is used in every packet sent</span>
    <span class="doccomment">/// from this socket.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_ttl</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">ttl</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">set_ttl</span>(<span class="ident">ttl</span>)
    }

    <span class="doccomment">/// Gets the value of the `IP_TTL` option for this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// For more information about this option, see [`set_ttl`][link].</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [link]: #method.set_ttl</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ttl</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">u32</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">ttl</span>()
    }

    <span class="doccomment">/// Sets the value for the `IPV6_V6ONLY` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// If this is set to `true` then the socket is restricted to sending and</span>
    <span class="doccomment">/// receiving IPv6 packets only. In this case two IPv4 and IPv6 applications</span>
    <span class="doccomment">/// can bind the same port at the same time.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// If this is set to `false` then the socket can be used to send and</span>
    <span class="doccomment">/// receive packets from an IPv4-mapped IPv6 address.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_only_v6</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">only_v6</span>: <span class="ident">bool</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">set_only_v6</span>(<span class="ident">only_v6</span>)
    }

    <span class="doccomment">/// Gets the value of the `IPV6_V6ONLY` option for this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// For more information about this option, see [`set_only_v6`][link].</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [link]: #method.set_only_v6</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">only_v6</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">bool</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">only_v6</span>()
    }

    <span class="doccomment">/// Sets the value for the `SO_LINGER` option on this socket.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_linger</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">dur</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Duration</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">set_linger</span>(<span class="ident">dur</span>)
    }

    <span class="doccomment">/// Gets the value of the `SO_LINGER` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// For more information about this option, see [`set_linger`][link].</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [link]: #method.set_linger</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">linger</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Duration</span><span class="op">&gt;</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">linger</span>()
    }

    <span class="attribute">#[<span class="ident">deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">&quot;0.6.9&quot;</span>, <span class="ident">note</span> <span class="op">=</span> <span class="string">&quot;use set_keepalive&quot;</span>)]</span>
    <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">&quot;with-deprecated&quot;</span>)]</span>
    <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_keepalive_ms</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">keepalive</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">u32</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">set_keepalive</span>(<span class="ident">keepalive</span>.<span class="ident">map</span>(<span class="op">|</span><span class="ident">v</span><span class="op">|</span> {
            <span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="ident">u64</span>::<span class="ident">from</span>(<span class="ident">v</span>))
        }))
    }

    <span class="attribute">#[<span class="ident">deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">&quot;0.6.9&quot;</span>, <span class="ident">note</span> <span class="op">=</span> <span class="string">&quot;use keepalive&quot;</span>)]</span>
    <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">&quot;with-deprecated&quot;</span>)]</span>
    <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">keepalive_ms</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">u32</span><span class="op">&gt;</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">keepalive</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">v</span><span class="op">|</span> {
            <span class="ident">v</span>.<span class="ident">map</span>(<span class="op">|</span><span class="ident">v</span><span class="op">|</span> {
                ::<span class="ident">convert</span>::<span class="ident">millis</span>(<span class="ident">v</span>) <span class="kw">as</span> <span class="ident">u32</span>
            })
        })
    }

    <span class="doccomment">/// Get the value of the `SO_ERROR` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This will retrieve the stored error in the underlying socket, clearing</span>
    <span class="doccomment">/// the field in the process. This can be useful for checking errors between</span>
    <span class="doccomment">/// calls.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">take_error</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">io</span>::<span class="ident">Error</span><span class="op">&gt;</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">take_error</span>()
    }

    <span class="doccomment">/// Receives data on the socket from the remote address to which it is</span>
    <span class="doccomment">/// connected, without removing that data from the queue. On success,</span>
    <span class="doccomment">/// returns the number of bytes peeked.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// Successive calls return the same data. This is accomplished by passing</span>
    <span class="doccomment">/// `MSG_PEEK` as a flag to the underlying recv system call.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">peek</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">peek</span>(<span class="ident">buf</span>)
    }

    <span class="doccomment">/// Read in a list of buffers all at once.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This operation will attempt to read bytes from this socket and place</span>
    <span class="doccomment">/// them into the list of buffers provided. Note that each buffer is an</span>
    <span class="doccomment">/// `IoVec` which can be created from a byte slice.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// The buffers provided will be filled in sequentially. A buffer will be</span>
    <span class="doccomment">/// entirely filled up before the next is written to.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// The number of bytes read is returned, if successful, or an error is</span>
    <span class="doccomment">/// returned otherwise. If no bytes are available to be read yet then</span>
    <span class="doccomment">/// a &quot;would block&quot; error is returned. This operation does not block.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// On Unix this corresponds to the `readv` syscall.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">read_bufs</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">bufs</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">IoVec</span>]) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">readv</span>(<span class="ident">bufs</span>)
    }

    <span class="doccomment">/// Write a list of buffers all at once.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This operation will attempt to write a list of byte buffers to this</span>
    <span class="doccomment">/// socket. Note that each buffer is an `IoVec` which can be created from a</span>
    <span class="doccomment">/// byte slice.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// The buffers provided will be written sequentially. A buffer will be</span>
    <span class="doccomment">/// entirely written before the next is written.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// The number of bytes written is returned, if successful, or an error is</span>
    <span class="doccomment">/// returned otherwise. If the socket is not currently writable then a</span>
    <span class="doccomment">/// &quot;would block&quot; error is returned. This operation does not block.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// On Unix this corresponds to the `writev` syscall.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">write_bufs</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">bufs</span>: <span class="kw-2">&amp;</span>[<span class="kw-2">&amp;</span><span class="ident">IoVec</span>]) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">writev</span>(<span class="ident">bufs</span>)
    }
}

<span class="kw">fn</span> <span class="ident">inaddr_any</span>(<span class="ident">other</span>: <span class="kw-2">&amp;</span><span class="ident">SocketAddr</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">SocketAddr</span> {
    <span class="kw">match</span> <span class="kw-2">*</span><span class="ident">other</span> {
        <span class="ident">SocketAddr</span>::<span class="ident">V4</span>(..) <span class="op">=</span><span class="op">&gt;</span> {
            <span class="kw">let</span> <span class="ident">any</span> <span class="op">=</span> <span class="ident">Ipv4Addr</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>);
            <span class="kw">let</span> <span class="ident">addr</span> <span class="op">=</span> <span class="ident">SocketAddrV4</span>::<span class="ident">new</span>(<span class="ident">any</span>, <span class="number">0</span>);
            <span class="ident">SocketAddr</span>::<span class="ident">V4</span>(<span class="ident">addr</span>)
        }
        <span class="ident">SocketAddr</span>::<span class="ident">V6</span>(..) <span class="op">=</span><span class="op">&gt;</span> {
            <span class="kw">let</span> <span class="ident">any</span> <span class="op">=</span> <span class="ident">Ipv6Addr</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>);
            <span class="kw">let</span> <span class="ident">addr</span> <span class="op">=</span> <span class="ident">SocketAddrV6</span>::<span class="ident">new</span>(<span class="ident">any</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>);
            <span class="ident">SocketAddr</span>::<span class="ident">V6</span>(<span class="ident">addr</span>)
        }
    }
}

<span class="kw">impl</span> <span class="ident">Read</span> <span class="kw">for</span> <span class="ident">TcpStream</span> {
    <span class="kw">fn</span> <span class="ident">read</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        (<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">sys</span>).<span class="ident">read</span>(<span class="ident">buf</span>)
    }
}

<span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;a</span><span class="op">&gt;</span> <span class="ident">Read</span> <span class="kw">for</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;a</span> <span class="ident">TcpStream</span> {
    <span class="kw">fn</span> <span class="ident">read</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        (<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">sys</span>).<span class="ident">read</span>(<span class="ident">buf</span>)
    }
}

<span class="kw">impl</span> <span class="ident">Write</span> <span class="kw">for</span> <span class="ident">TcpStream</span> {
    <span class="kw">fn</span> <span class="ident">write</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>]) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        (<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">sys</span>).<span class="ident">write</span>(<span class="ident">buf</span>)
    }

    <span class="kw">fn</span> <span class="ident">flush</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        (<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">sys</span>).<span class="ident">flush</span>()
    }
}

<span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;a</span><span class="op">&gt;</span> <span class="ident">Write</span> <span class="kw">for</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;a</span> <span class="ident">TcpStream</span> {
    <span class="kw">fn</span> <span class="ident">write</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>]) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        (<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">sys</span>).<span class="ident">write</span>(<span class="ident">buf</span>)
    }

    <span class="kw">fn</span> <span class="ident">flush</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        (<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">sys</span>).<span class="ident">flush</span>()
    }
}

<span class="kw">impl</span> <span class="ident">Evented</span> <span class="kw">for</span> <span class="ident">TcpStream</span> {
    <span class="kw">fn</span> <span class="ident">register</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">poll</span>: <span class="kw-2">&amp;</span><span class="ident">Poll</span>, <span class="ident">token</span>: <span class="ident">Token</span>,
                <span class="ident">interest</span>: <span class="ident">Ready</span>, <span class="ident">opts</span>: <span class="ident">PollOpt</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">selector_id</span>.<span class="ident">associate_selector</span>(<span class="ident">poll</span>)<span class="question-mark">?</span>;
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">register</span>(<span class="ident">poll</span>, <span class="ident">token</span>, <span class="ident">interest</span>, <span class="ident">opts</span>)
    }

    <span class="kw">fn</span> <span class="ident">reregister</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">poll</span>: <span class="kw-2">&amp;</span><span class="ident">Poll</span>, <span class="ident">token</span>: <span class="ident">Token</span>,
                  <span class="ident">interest</span>: <span class="ident">Ready</span>, <span class="ident">opts</span>: <span class="ident">PollOpt</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">reregister</span>(<span class="ident">poll</span>, <span class="ident">token</span>, <span class="ident">interest</span>, <span class="ident">opts</span>)
    }

    <span class="kw">fn</span> <span class="ident">deregister</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">poll</span>: <span class="kw-2">&amp;</span><span class="ident">Poll</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">deregister</span>(<span class="ident">poll</span>)
    }
}

<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">TcpStream</span> {
    <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
        <span class="ident">fmt</span>::<span class="ident">Debug</span>::<span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">sys</span>, <span class="ident">f</span>)
    }
}

<span class="comment">/*
 *
 * ===== TcpListener =====
 *
 */</span>

<span class="doccomment">/// A structure representing a socket server</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// # use std::error::Error;</span>
<span class="doccomment">/// # fn try_main() -&gt; Result&lt;(), Box&lt;Error&gt;&gt; {</span>
<span class="doccomment">/// use mio::{Events, Ready, Poll, PollOpt, Token};</span>
<span class="doccomment">/// use mio::net::TcpListener;</span>
<span class="doccomment">/// use std::time::Duration;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let listener = TcpListener::bind(&amp;&quot;127.0.0.1:34255&quot;.parse()?)?;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let poll = Poll::new()?;</span>
<span class="doccomment">/// let mut events = Events::with_capacity(128);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Register the socket with `Poll`</span>
<span class="doccomment">/// poll.register(&amp;listener, Token(0), Ready::readable(),</span>
<span class="doccomment">///               PollOpt::edge())?;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// poll.poll(&amp;mut events, Some(Duration::from_millis(100)))?;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // There may be a socket ready to be accepted</span>
<span class="doccomment">/// #     Ok(())</span>
<span class="doccomment">/// # }</span>
<span class="doccomment">/// #</span>
<span class="doccomment">/// # fn main() {</span>
<span class="doccomment">/// #     try_main().unwrap();</span>
<span class="doccomment">/// # }</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">TcpListener</span> {
    <span class="ident">sys</span>: <span class="ident">sys</span>::<span class="ident">TcpListener</span>,
    <span class="ident">selector_id</span>: <span class="ident">SelectorId</span>,
}

<span class="kw">impl</span> <span class="ident">TcpListener</span> {
    <span class="doccomment">/// Convenience method to bind a new TCP listener to the specified address</span>
    <span class="doccomment">/// to receive new connections.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This function will take the following steps:</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// 1. Create a new TCP socket.</span>
    <span class="doccomment">/// 2. Set the `SO_REUSEADDR` option on the socket.</span>
    <span class="doccomment">/// 3. Bind the socket to the specified address.</span>
    <span class="doccomment">/// 4. Call `listen` on the socket to prepare it to receive new connections.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// If fine-grained control over the binding and listening process for a</span>
    <span class="doccomment">/// socket is desired then the `net2::TcpBuilder` methods can be used in</span>
    <span class="doccomment">/// combination with the `TcpListener::from_listener` method to transfer</span>
    <span class="doccomment">/// ownership into mio.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">bind</span>(<span class="ident">addr</span>: <span class="kw-2">&amp;</span><span class="ident">SocketAddr</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">TcpListener</span><span class="op">&gt;</span> {
        <span class="comment">// Create the socket</span>
        <span class="kw">let</span> <span class="ident">sock</span> <span class="op">=</span> <span class="kw">match</span> <span class="kw-2">*</span><span class="ident">addr</span> {
            <span class="ident">SocketAddr</span>::<span class="ident">V4</span>(..) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">TcpBuilder</span>::<span class="ident">new_v4</span>(),
            <span class="ident">SocketAddr</span>::<span class="ident">V6</span>(..) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">TcpBuilder</span>::<span class="ident">new_v6</span>(),
        }<span class="question-mark">?</span>;

        <span class="comment">// Set SO_REUSEADDR, but only on Unix (mirrors what libstd does)</span>
        <span class="kw">if</span> <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">unix</span>) {
            <span class="ident">sock</span>.<span class="ident">reuse_address</span>(<span class="bool-val">true</span>)<span class="question-mark">?</span>;
        }

        <span class="comment">// Bind the socket</span>
        <span class="ident">sock</span>.<span class="ident">bind</span>(<span class="ident">addr</span>)<span class="question-mark">?</span>;

        <span class="comment">// listen</span>
        <span class="kw">let</span> <span class="ident">listener</span> <span class="op">=</span> <span class="ident">sock</span>.<span class="ident">listen</span>(<span class="number">1024</span>)<span class="question-mark">?</span>;
        <span class="prelude-val">Ok</span>(<span class="ident">TcpListener</span> {
            <span class="ident">sys</span>: <span class="ident">sys</span>::<span class="ident">TcpListener</span>::<span class="ident">new</span>(<span class="ident">listener</span>)<span class="question-mark">?</span>,
            <span class="ident">selector_id</span>: <span class="ident">SelectorId</span>::<span class="ident">new</span>(),
        })
    }

    <span class="attribute">#[<span class="ident">deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">&quot;0.6.13&quot;</span>, <span class="ident">note</span> <span class="op">=</span> <span class="string">&quot;use from_std instead&quot;</span>)]</span>
    <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">&quot;with-deprecated&quot;</span>)]</span>
    <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_listener</span>(<span class="ident">listener</span>: <span class="ident">net</span>::<span class="ident">TcpListener</span>, <span class="kw">_</span>: <span class="kw-2">&amp;</span><span class="ident">SocketAddr</span>)
                         <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">TcpListener</span><span class="op">&gt;</span> {
        <span class="ident">TcpListener</span>::<span class="ident">from_std</span>(<span class="ident">listener</span>)
    }

    <span class="doccomment">/// Creates a new `TcpListener` from an instance of a</span>
    <span class="doccomment">/// `std::net::TcpListener` type.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This function will set the `listener` provided into nonblocking mode on</span>
    <span class="doccomment">/// Unix, and otherwise the stream will just be wrapped up in an mio stream</span>
    <span class="doccomment">/// ready to accept new connections and become associated with an event</span>
    <span class="doccomment">/// loop.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// The address provided must be the address that the listener is bound to.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_std</span>(<span class="ident">listener</span>: <span class="ident">net</span>::<span class="ident">TcpListener</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">TcpListener</span><span class="op">&gt;</span> {
        <span class="ident">sys</span>::<span class="ident">TcpListener</span>::<span class="ident">new</span>(<span class="ident">listener</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
            <span class="ident">TcpListener</span> {
                <span class="ident">sys</span>: <span class="ident">s</span>,
                <span class="ident">selector_id</span>: <span class="ident">SelectorId</span>::<span class="ident">new</span>(),
            }
        })
    }

    <span class="doccomment">/// Accepts a new `TcpStream`.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This may return an `Err(e)` where `e.kind()` is</span>
    <span class="doccomment">/// `io::ErrorKind::WouldBlock`. This means a stream may be ready at a later</span>
    <span class="doccomment">/// point and one should wait for a notification before calling `accept`</span>
    <span class="doccomment">/// again.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// If an accepted stream is returned, the remote address of the peer is</span>
    <span class="doccomment">/// returned along with it.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">accept</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>(<span class="ident">TcpStream</span>, <span class="ident">SocketAddr</span>)<span class="op">&gt;</span> {
        <span class="kw">let</span> (<span class="ident">s</span>, <span class="ident">a</span>) <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">accept_std</span>());
        <span class="prelude-val">Ok</span>((<span class="ident">TcpStream</span>::<span class="ident">from_stream</span>(<span class="ident">s</span>)<span class="question-mark">?</span>, <span class="ident">a</span>))
    }

    <span class="doccomment">/// Accepts a new `std::net::TcpStream`.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This method is the same as `accept`, except that it returns a TCP socket</span>
    <span class="doccomment">/// *in blocking mode* which isn&#39;t bound to `mio`. This can be later then</span>
    <span class="doccomment">/// converted to a `mio` type, if necessary.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">accept_std</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>(<span class="ident">net</span>::<span class="ident">TcpStream</span>, <span class="ident">SocketAddr</span>)<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">accept</span>()
    }

    <span class="doccomment">/// Returns the local socket address of this listener.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">local_addr</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">SocketAddr</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">local_addr</span>()
    }

    <span class="doccomment">/// Creates a new independently owned handle to the underlying socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// The returned `TcpListener` is a reference to the same socket that this</span>
    <span class="doccomment">/// object references. Both handles can be used to accept incoming</span>
    <span class="doccomment">/// connections and options set on one listener will affect the other.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">try_clone</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">TcpListener</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">try_clone</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
            <span class="ident">TcpListener</span> {
                <span class="ident">sys</span>: <span class="ident">s</span>,
                <span class="ident">selector_id</span>: <span class="self">self</span>.<span class="ident">selector_id</span>.<span class="ident">clone</span>(),
            }
        })
    }

    <span class="doccomment">/// Sets the value for the `IP_TTL` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This value sets the time-to-live field that is used in every packet sent</span>
    <span class="doccomment">/// from this socket.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_ttl</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">ttl</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">set_ttl</span>(<span class="ident">ttl</span>)
    }

    <span class="doccomment">/// Gets the value of the `IP_TTL` option for this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// For more information about this option, see [`set_ttl`][link].</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [link]: #method.set_ttl</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ttl</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">u32</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">ttl</span>()
    }

    <span class="doccomment">/// Sets the value for the `IPV6_V6ONLY` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// If this is set to `true` then the socket is restricted to sending and</span>
    <span class="doccomment">/// receiving IPv6 packets only. In this case two IPv4 and IPv6 applications</span>
    <span class="doccomment">/// can bind the same port at the same time.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// If this is set to `false` then the socket can be used to send and</span>
    <span class="doccomment">/// receive packets from an IPv4-mapped IPv6 address.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_only_v6</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">only_v6</span>: <span class="ident">bool</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">set_only_v6</span>(<span class="ident">only_v6</span>)
    }

    <span class="doccomment">/// Gets the value of the `IPV6_V6ONLY` option for this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// For more information about this option, see [`set_only_v6`][link].</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [link]: #method.set_only_v6</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">only_v6</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">bool</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">only_v6</span>()
    }

    <span class="doccomment">/// Get the value of the `SO_ERROR` option on this socket.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// This will retrieve the stored error in the underlying socket, clearing</span>
    <span class="doccomment">/// the field in the process. This can be useful for checking errors between</span>
    <span class="doccomment">/// calls.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">take_error</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">io</span>::<span class="ident">Error</span><span class="op">&gt;</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">take_error</span>()
    }
}

<span class="kw">impl</span> <span class="ident">Evented</span> <span class="kw">for</span> <span class="ident">TcpListener</span> {
    <span class="kw">fn</span> <span class="ident">register</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">poll</span>: <span class="kw-2">&amp;</span><span class="ident">Poll</span>, <span class="ident">token</span>: <span class="ident">Token</span>,
                <span class="ident">interest</span>: <span class="ident">Ready</span>, <span class="ident">opts</span>: <span class="ident">PollOpt</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">selector_id</span>.<span class="ident">associate_selector</span>(<span class="ident">poll</span>)<span class="question-mark">?</span>;
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">register</span>(<span class="ident">poll</span>, <span class="ident">token</span>, <span class="ident">interest</span>, <span class="ident">opts</span>)
    }

    <span class="kw">fn</span> <span class="ident">reregister</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">poll</span>: <span class="kw-2">&amp;</span><span class="ident">Poll</span>, <span class="ident">token</span>: <span class="ident">Token</span>,
                  <span class="ident">interest</span>: <span class="ident">Ready</span>, <span class="ident">opts</span>: <span class="ident">PollOpt</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">reregister</span>(<span class="ident">poll</span>, <span class="ident">token</span>, <span class="ident">interest</span>, <span class="ident">opts</span>)
    }

    <span class="kw">fn</span> <span class="ident">deregister</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">poll</span>: <span class="kw-2">&amp;</span><span class="ident">Poll</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">deregister</span>(<span class="ident">poll</span>)
    }
}

<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">TcpListener</span> {
    <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
        <span class="ident">fmt</span>::<span class="ident">Debug</span>::<span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">sys</span>, <span class="ident">f</span>)
    }
}

<span class="comment">/*
 *
 * ===== UNIX ext =====
 *
 */</span>

<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">unix</span>, <span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;fuchsia&quot;</span>)))]</span>
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">os</span>::<span class="ident">unix</span>::<span class="ident">io</span>::{<span class="ident">IntoRawFd</span>, <span class="ident">AsRawFd</span>, <span class="ident">FromRawFd</span>, <span class="ident">RawFd</span>};

<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">unix</span>, <span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;fuchsia&quot;</span>)))]</span>
<span class="kw">impl</span> <span class="ident">IntoRawFd</span> <span class="kw">for</span> <span class="ident">TcpStream</span> {
    <span class="kw">fn</span> <span class="ident">into_raw_fd</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">RawFd</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">into_raw_fd</span>()
    }
}

<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">unix</span>, <span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;fuchsia&quot;</span>)))]</span>
<span class="kw">impl</span> <span class="ident">AsRawFd</span> <span class="kw">for</span> <span class="ident">TcpStream</span> {
    <span class="kw">fn</span> <span class="ident">as_raw_fd</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">RawFd</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">as_raw_fd</span>()
    }
}

<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">unix</span>, <span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;fuchsia&quot;</span>)))]</span>
<span class="kw">impl</span> <span class="ident">FromRawFd</span> <span class="kw">for</span> <span class="ident">TcpStream</span> {
    <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">from_raw_fd</span>(<span class="ident">fd</span>: <span class="ident">RawFd</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">TcpStream</span> {
        <span class="ident">TcpStream</span> {
            <span class="ident">sys</span>: <span class="ident">FromRawFd</span>::<span class="ident">from_raw_fd</span>(<span class="ident">fd</span>),
            <span class="ident">selector_id</span>: <span class="ident">SelectorId</span>::<span class="ident">new</span>(),
        }
    }
}

<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">unix</span>, <span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;fuchsia&quot;</span>)))]</span>
<span class="kw">impl</span> <span class="ident">IntoRawFd</span> <span class="kw">for</span> <span class="ident">TcpListener</span> {
    <span class="kw">fn</span> <span class="ident">into_raw_fd</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">RawFd</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">into_raw_fd</span>()
    }
}

<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">unix</span>, <span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;fuchsia&quot;</span>)))]</span>
<span class="kw">impl</span> <span class="ident">AsRawFd</span> <span class="kw">for</span> <span class="ident">TcpListener</span> {
    <span class="kw">fn</span> <span class="ident">as_raw_fd</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">RawFd</span> {
        <span class="self">self</span>.<span class="ident">sys</span>.<span class="ident">as_raw_fd</span>()
    }
}

<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">unix</span>, <span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;fuchsia&quot;</span>)))]</span>
<span class="kw">impl</span> <span class="ident">FromRawFd</span> <span class="kw">for</span> <span class="ident">TcpListener</span> {
    <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">from_raw_fd</span>(<span class="ident">fd</span>: <span class="ident">RawFd</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">TcpListener</span> {
        <span class="ident">TcpListener</span> {
            <span class="ident">sys</span>: <span class="ident">FromRawFd</span>::<span class="ident">from_raw_fd</span>(<span class="ident">fd</span>),
            <span class="ident">selector_id</span>: <span class="ident">SelectorId</span>::<span class="ident">new</span>(),
        }
    }
}
</pre></div>
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