| <!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 of the Rust file `/root/.cargo/git/checkouts/incubator-teaclave-crates-c8106113f74feefc/ede1f68/mio/src/sys/unix/tcp.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>tcp.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../../normalize.css"><link rel="stylesheet" href="../../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../../ayu.css" disabled><link rel="stylesheet" href="../../../../dark.css" disabled><link rel="stylesheet" href="../../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../../storage.js"></script><script defer src="../../../../source-script.js"></script><script defer src="../../../../source-files.js"></script><script defer src="../../../../main.js"></script><noscript><link rel="stylesheet" href="../../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../../mio/index.html"><div class="logo-container"><img class="rust-logo" src="../../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../../mio/index.html"><img class="rust-logo" src="../../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="kw">use </span>std::convert::TryInto; |
| <span class="kw">use </span>std::io; |
| <span class="kw">use </span>std::mem::{size_of, MaybeUninit}; |
| <span class="kw">use </span>std::net::{<span class="self">self</span>, SocketAddr}; |
| <span class="kw">use </span>std::os::unix::io::{AsRawFd, FromRawFd}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::sys::unix::net::{new_socket, socket_addr, to_socket_addr}; |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new_for_addr(address: SocketAddr) -> io::Result<libc::c_int> { |
| <span class="kw">let </span>domain = <span class="kw">match </span>address { |
| SocketAddr::V4(<span class="kw">_</span>) => libc::AF_INET, |
| SocketAddr::V6(<span class="kw">_</span>) => libc::AF_INET6, |
| }; |
| new_socket(domain, libc::SOCK_STREAM) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>bind(socket: <span class="kw-2">&</span>net::TcpListener, addr: SocketAddr) -> io::Result<()> { |
| <span class="kw">let </span>(raw_addr, raw_addr_length) = socket_addr(<span class="kw-2">&</span>addr); |
| <span class="macro">syscall!</span>(bind(socket.as_raw_fd(), raw_addr.as_ptr(), raw_addr_length))<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>connect(socket: <span class="kw-2">&</span>net::TcpStream, addr: SocketAddr) -> io::Result<()> { |
| <span class="kw">let </span>(raw_addr, raw_addr_length) = socket_addr(<span class="kw-2">&</span>addr); |
| |
| <span class="kw">match </span><span class="macro">syscall!</span>(connect( |
| socket.as_raw_fd(), |
| raw_addr.as_ptr(), |
| raw_addr_length |
| )) { |
| <span class="prelude-val">Err</span>(err) <span class="kw">if </span>err.raw_os_error() != <span class="prelude-val">Some</span>(libc::EINPROGRESS) => <span class="prelude-val">Err</span>(err), |
| <span class="kw">_ </span>=> <span class="prelude-val">Ok</span>(()), |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>listen(socket: <span class="kw-2">&</span>net::TcpListener, backlog: u32) -> io::Result<()> { |
| <span class="kw">let </span>backlog = backlog.try_into().unwrap_or(i32::max_value()); |
| <span class="macro">syscall!</span>(listen(socket.as_raw_fd(), backlog))<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>set_reuseaddr(socket: <span class="kw-2">&</span>net::TcpListener, reuseaddr: bool) -> io::Result<()> { |
| <span class="kw">let </span>val: libc::c_int = i32::from(reuseaddr); |
| <span class="macro">syscall!</span>(setsockopt( |
| socket.as_raw_fd(), |
| libc::SOL_SOCKET, |
| libc::SO_REUSEADDR, |
| <span class="kw-2">&</span>val <span class="kw">as </span><span class="kw-2">*const </span>libc::c_int <span class="kw">as </span><span class="kw-2">*const </span>libc::c_void, |
| size_of::<libc::c_int>() <span class="kw">as </span>libc::socklen_t, |
| ))<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>accept(listener: <span class="kw-2">&</span>net::TcpListener) -> io::Result<(net::TcpStream, SocketAddr)> { |
| <span class="kw">let </span><span class="kw-2">mut </span>addr: MaybeUninit<libc::sockaddr_storage> = MaybeUninit::uninit(); |
| <span class="kw">let </span><span class="kw-2">mut </span>length = size_of::<libc::sockaddr_storage>() <span class="kw">as </span>libc::socklen_t; |
| |
| <span class="comment">// On platforms that support it we can use `accept4(2)` to set `NONBLOCK` |
| // and `CLOEXEC` in the call to accept the connection. |
| </span><span class="attribute">#[cfg(any( |
| <span class="comment">// Android x86's seccomp profile forbids calls to `accept4(2)` |
| // See https://github.com/tokio-rs/mio/issues/1445 for details |
| </span>all(not(target_arch=<span class="string">"x86"</span>), target_os = <span class="string">"android"</span>), |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"openbsd"</span>, |
| ))] |
| </span><span class="kw">let </span>stream = { |
| <span class="macro">syscall!</span>(accept4( |
| listener.as_raw_fd(), |
| addr.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>, |
| <span class="kw-2">&mut </span>length, |
| libc::SOCK_CLOEXEC | libc::SOCK_NONBLOCK, |
| )) |
| .map(|socket| <span class="kw">unsafe </span>{ net::TcpStream::from_raw_fd(socket) }) |
| }<span class="question-mark">?</span>; |
| |
| <span class="comment">// But not all platforms have the `accept4(2)` call. Luckily BSD (derived) |
| // OSes inherit the non-blocking flag from the listener, so we just have to |
| // set `CLOEXEC`. |
| </span><span class="attribute">#[cfg(any( |
| target_os = <span class="string">"ios"</span>, |
| target_os = <span class="string">"macos"</span>, |
| target_os = <span class="string">"redox"</span>, |
| target_os = <span class="string">"tvos"</span>, |
| target_os = <span class="string">"watchos"</span>, |
| all(target_arch = <span class="string">"x86"</span>, target_os = <span class="string">"android"</span>), |
| ))] |
| </span><span class="kw">let </span>stream = { |
| <span class="macro">syscall!</span>(accept( |
| listener.as_raw_fd(), |
| addr.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>, |
| <span class="kw-2">&mut </span>length |
| )) |
| .map(|socket| <span class="kw">unsafe </span>{ net::TcpStream::from_raw_fd(socket) }) |
| .and_then(|s| { |
| <span class="macro">syscall!</span>(fcntl(s.as_raw_fd(), libc::F_SETFD, libc::FD_CLOEXEC))<span class="question-mark">?</span>; |
| |
| <span class="comment">// See https://github.com/tokio-rs/mio/issues/1450 |
| </span><span class="attribute">#[cfg(all(target_arch = <span class="string">"x86"</span>, target_os = <span class="string">"android"</span>))] |
| </span><span class="macro">syscall!</span>(fcntl(s.as_raw_fd(), libc::F_SETFL, libc::O_NONBLOCK))<span class="question-mark">?</span>; |
| |
| <span class="prelude-val">Ok</span>(s) |
| }) |
| }<span class="question-mark">?</span>; |
| |
| <span class="comment">// This is safe because `accept` calls above ensures the address |
| // initialised. |
| </span><span class="kw">unsafe </span>{ to_socket_addr(addr.as_ptr()) }.map(|addr| (stream, addr)) |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../../" data-current-crate="mio" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
