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| </pre><div class="example-wrap"><pre class="rust "> |
| <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="attribute">#[<span class="ident">cfg</span>(<span class="ident">unix</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">AsRawFd</span>, <span class="ident">FromRawFd</span>, <span class="ident">IntoRawFd</span>, <span class="ident">RawFd</span>}; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">windows</span>)]</span> |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">os</span>::<span class="ident">windows</span>::<span class="ident">io</span>::{<span class="ident">AsRawSocket</span>, <span class="ident">FromRawSocket</span>, <span class="ident">IntoRawSocket</span>, <span class="ident">RawSocket</span>}; |
| <span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">fmt</span>, <span class="ident">io</span>}; |
| |
| <span class="kw">use</span> <span class="kw">super</span>::{<span class="ident">TcpSocket</span>, <span class="ident">TcpStream</span>}; |
| <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">io_source</span>::<span class="ident">IoSource</span>; |
| <span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">event</span>, <span class="ident">sys</span>, <span class="ident">Interest</span>, <span class="ident">Registry</span>, <span class="ident">Token</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="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"os-poll"</span>, <span class="ident">doc</span> <span class="op">=</span> <span class="string">"```"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"os-poll"</span>), <span class="ident">doc</span> <span class="op">=</span> <span class="string">"```ignore"</span>)]</span> |
| <span class="doccomment">/// # use std::error::Error;</span> |
| <span class="doccomment">/// # fn main() -> Result<(), Box<dyn Error>> {</span> |
| <span class="doccomment">/// use mio::{Events, Interest, Poll, 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 mut listener = TcpListener::bind("127.0.0.1:34255".parse()?)?;</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// let mut 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.registry().register(&mut listener, Token(0), Interest::READABLE)?;</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// poll.poll(&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="kw">pub</span> <span class="kw">struct</span> <span class="ident">TcpListener</span> { |
| <span class="ident">inner</span>: <span class="ident">IoSource</span><span class="op"><</span><span class="ident">net</span>::<span class="ident">TcpListener</span><span class="op">></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 on Unix.</span> |
| <span class="doccomment">/// 3. Bind the socket to the specified address.</span> |
| <span class="doccomment">/// 4. Calls `listen` on the socket to prepare it to receive new connections.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">bind</span>(<span class="ident">addr</span>: <span class="ident">SocketAddr</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">TcpListener</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">socket</span> <span class="op">=</span> <span class="ident">TcpSocket</span>::<span class="ident">new_for_addr</span>(<span class="ident">addr</span>)<span class="question-mark">?</span>; |
| |
| <span class="comment">// On platforms with Berkeley-derived sockets, this allows to quickly</span> |
| <span class="comment">// rebind a socket, without needing to wait for the OS to clean up the</span> |
| <span class="comment">// previous one.</span> |
| <span class="comment">//</span> |
| <span class="comment">// On Windows, this allows rebinding sockets which are actively in use,</span> |
| <span class="comment">// which allows “socket hijacking”, so we explicitly don't set it here.</span> |
| <span class="comment">// https://docs.microsoft.com/en-us/windows/win32/winsock/using-so-reuseaddr-and-so-exclusiveaddruse</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">windows</span>))]</span> |
| <span class="ident">socket</span>.<span class="ident">set_reuseaddr</span>(<span class="bool-val">true</span>)<span class="question-mark">?</span>; |
| |
| <span class="ident">socket</span>.<span class="ident">bind</span>(<span class="ident">addr</span>)<span class="question-mark">?</span>; |
| <span class="ident">socket</span>.<span class="ident">listen</span>(<span class="number">1024</span>) |
| } |
| |
| <span class="doccomment">/// Creates a new `TcpListener` from a standard `net::TcpListener`.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This function is intended to be used to wrap a TCP listener from the</span> |
| <span class="doccomment">/// standard library in the Mio equivalent. The conversion assumes nothing</span> |
| <span class="doccomment">/// about the underlying listener; ; it is left up to the user to set it</span> |
| <span class="doccomment">/// in non-blocking mode.</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">></span> <span class="ident">TcpListener</span> { |
| <span class="ident">TcpListener</span> { |
| <span class="ident">inner</span>: <span class="ident">IoSource</span>::<span class="ident">new</span>(<span class="ident">listener</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 an event before calling `accept` 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">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>(<span class="ident">TcpStream</span>, <span class="ident">SocketAddr</span>)<span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">do_io</span>(<span class="op">|</span><span class="ident">inner</span><span class="op">|</span> { |
| <span class="ident">sys</span>::<span class="ident">tcp</span>::<span class="ident">accept</span>(<span class="ident">inner</span>).<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">stream</span>, <span class="ident">addr</span>)<span class="op">|</span> (<span class="ident">TcpStream</span>::<span class="ident">from_std</span>(<span class="ident">stream</span>), <span class="ident">addr</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">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">SocketAddr</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">local_addr</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">&</span><span class="self">self</span>, <span class="ident">ttl</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">inner</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">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">ttl</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">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">io</span>::<span class="ident">Error</span><span class="op">></span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">take_error</span>() |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">event</span>::<span class="ident">Source</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">&</span><span class="kw-2">mut</span> <span class="self">self</span>, |
| <span class="ident">registry</span>: <span class="kw-2">&</span><span class="ident">Registry</span>, |
| <span class="ident">token</span>: <span class="ident">Token</span>, |
| <span class="ident">interests</span>: <span class="ident">Interest</span>, |
| ) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">register</span>(<span class="ident">registry</span>, <span class="ident">token</span>, <span class="ident">interests</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">reregister</span>( |
| <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, |
| <span class="ident">registry</span>: <span class="kw-2">&</span><span class="ident">Registry</span>, |
| <span class="ident">token</span>: <span class="ident">Token</span>, |
| <span class="ident">interests</span>: <span class="ident">Interest</span>, |
| ) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">reregister</span>(<span class="ident">registry</span>, <span class="ident">token</span>, <span class="ident">interests</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">deregister</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">registry</span>: <span class="kw-2">&</span><span class="ident">Registry</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">deregister</span>(<span class="ident">registry</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">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span><span class="op"><</span><span class="lifetime">'_</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { |
| <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">fmt</span>(<span class="ident">f</span>) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">unix</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">></span> <span class="ident">RawFd</span> { |
| <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">into_inner</span>().<span class="ident">into_raw_fd</span>() |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">unix</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">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">RawFd</span> { |
| <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">as_raw_fd</span>() |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">unix</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">FromRawFd</span> <span class="kw">for</span> <span class="ident">TcpListener</span> { |
| <span class="doccomment">/// Converts a `RawFd` to a `TcpListener`.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// # Notes</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// The caller is responsible for ensuring that the socket is in</span> |
| <span class="doccomment">/// non-blocking mode.</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">></span> <span class="ident">TcpListener</span> { |
| <span class="ident">TcpListener</span>::<span class="ident">from_std</span>(<span class="ident">FromRawFd</span>::<span class="ident">from_raw_fd</span>(<span class="ident">fd</span>)) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">windows</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">IntoRawSocket</span> <span class="kw">for</span> <span class="ident">TcpListener</span> { |
| <span class="kw">fn</span> <span class="ident">into_raw_socket</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">RawSocket</span> { |
| <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">into_inner</span>().<span class="ident">into_raw_socket</span>() |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">windows</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">AsRawSocket</span> <span class="kw">for</span> <span class="ident">TcpListener</span> { |
| <span class="kw">fn</span> <span class="ident">as_raw_socket</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">RawSocket</span> { |
| <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">as_raw_socket</span>() |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">windows</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">FromRawSocket</span> <span class="kw">for</span> <span class="ident">TcpListener</span> { |
| <span class="doccomment">/// Converts a `RawSocket` to a `TcpListener`.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// # Notes</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// The caller is responsible for ensuring that the socket is in</span> |
| <span class="doccomment">/// non-blocking mode.</span> |
| <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">from_raw_socket</span>(<span class="ident">socket</span>: <span class="ident">RawSocket</span>) <span class="op">-</span><span class="op">></span> <span class="ident">TcpListener</span> { |
| <span class="ident">TcpListener</span>::<span class="ident">from_std</span>(<span class="ident">FromRawSocket</span>::<span class="ident">from_raw_socket</span>(<span class="ident">socket</span>)) |
| } |
| } |
| </pre></div> |
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