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<!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="This represents a single TLS client session."><meta name="keywords" content="rust, rustlang, rust-lang, ClientSession"><title>ClientSession in rustls - Rust</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" 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class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../rustls/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">ClientSession</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block"><li><a href="#method.early_data">early_data</a></li><li><a href="#method.is_early_data_accepted">is_early_data_accepted</a></li><li><a href="#method.new">new</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block"><li><a href="#impl-Debug-for-ClientSession">Debug</a></li><li><a href="#impl-Read-for-ClientSession">Read</a></li><li><a href="#impl-Session-for-ClientSession">Session</a></li><li><a href="#impl-Write-for-ClientSession">Write</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block"><li><a href="#impl-RefUnwindSafe-for-ClientSession">!RefUnwindSafe</a></li><li><a href="#impl-Send-for-ClientSession">Send</a></li><li><a href="#impl-Sync-for-ClientSession">Sync</a></li><li><a href="#impl-Unpin-for-ClientSession">Unpin</a></li><li><a href="#impl-UnwindSafe-for-ClientSession">!UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block"><li><a href="#impl-Any-for-ClientSession">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-ClientSession">Borrow&lt;T&gt;</a></li><li><a href="#impl-BorrowMut%3CT%3E-for-ClientSession">BorrowMut&lt;T&gt;</a></li><li><a href="#impl-From%3CT%3E-for-ClientSession">From&lt;T&gt;</a></li><li><a href="#impl-Into%3CU%3E-for-ClientSession">Into&lt;U&gt;</a></li><li><a href="#impl-TryFrom%3CU%3E-for-ClientSession">TryFrom&lt;U&gt;</a></li><li><a href="#impl-TryInto%3CU%3E-for-ClientSession">TryInto&lt;U&gt;</a></li></ul></section><h2><a href="index.html">In rustls</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><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="main-heading"><h1 class="fqn">Struct <a href="index.html">rustls</a>::<wbr><a class="struct" href="#">ClientSession</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../src/rustls/client/mod.rs.html#655-658">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">&#x2212;</span>]</a></span></div><div class="item-decl"><pre class="rust struct"><code>pub struct ClientSession { /* private fields */ }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>This represents a single TLS client session.</p>
</div></details><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><div id="implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-ClientSession" class="impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#660-704">source</a><a href="#impl-ClientSession" class="anchor"></a><h3 class="code-header">impl <a class="struct" href="struct.ClientSession.html" title="struct rustls::ClientSession">ClientSession</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.new" class="method has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#664-668">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fnname">new</a>(config: &amp;Arc&lt;<a class="struct" href="struct.ClientConfig.html" title="struct rustls::ClientConfig">ClientConfig</a>&gt;, hostname: <a class="struct" href="../webpki/name/struct.DNSNameRef.html" title="struct webpki::name::DNSNameRef">DNSNameRef</a>&lt;'_&gt;) -&gt; <a class="struct" href="struct.ClientSession.html" title="struct rustls::ClientSession">ClientSession</a></h4></section></summary><div class="docblock"><p>Make a new ClientSession. <code>config</code> controls how
we behave in the TLS protocol, <code>hostname</code> is the
hostname of who we want to talk to.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.early_data" class="method has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#688-694">source</a><h4 class="code-header">pub fn <a href="#method.early_data" class="fnname">early_data</a>(&amp;mut self) -&gt; Option&lt;<a class="struct" href="struct.WriteEarlyData.html" title="struct rustls::WriteEarlyData">WriteEarlyData</a>&lt;'_&gt;&gt;</h4></section></summary><div class="docblock"><p>Returns an <code>io::Write</code> implementor you can write bytes to
to send TLS1.3 early data (a.k.a. “0-RTT data”) to the server.</p>
<p>This returns None in many circumstances when the capability to
send early data is not available, including but not limited to:</p>
<ul>
<li>The server hasn’t been talked to previously.</li>
<li>The server does not support resumption.</li>
<li>The server does not support early data.</li>
<li>The resumption data for the server has expired.</li>
</ul>
<p>The server specifies a maximum amount of early data. You can
learn this limit through the returned object, and writes through
it will process only this many bytes.</p>
<p>The server can choose not to accept any sent early data –
in this case the data is lost but the connection continues. You
can tell this happened using <code>is_early_data_accepted</code>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.is_early_data_accepted" class="method has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#701-703">source</a><h4 class="code-header">pub fn <a href="#method.is_early_data_accepted" class="fnname">is_early_data_accepted</a>(&amp;self) -&gt; bool</h4></section></summary><div class="docblock"><p>Returns True if the server signalled it will process early data.</p>
<p>If you sent early data and this returns false at the end of the
handshake then the server will not process the data. This
is not an error, but you may wish to resend the data.</p>
</div></details></div></details></div><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Debug-for-ClientSession" class="impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#654">source</a><a href="#impl-Debug-for-ClientSession" class="anchor"></a><h3 class="code-header">impl Debug for <a class="struct" href="struct.ClientSession.html" title="struct rustls::ClientSession">ClientSession</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#654">source</a><a href="#method.fmt" class="anchor"></a><h4 class="code-header">fn <a class="fnname">fmt</a>(&amp;self, f: &amp;mut Formatter&lt;'_&gt;) -&gt; Result</h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Read-for-ClientSession" class="impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#769-785">source</a><a href="#impl-Read-for-ClientSession" class="anchor"></a><h3 class="code-header">impl Read for <a class="struct" href="struct.ClientSession.html" title="struct rustls::ClientSession">ClientSession</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.read" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#782-784">source</a><a href="#method.read" class="anchor"></a><h4 class="code-header">fn <a class="fnname">read</a>(&amp;mut self, buf: &amp;mut [u8]) -&gt; Result&lt;usize&gt;</h4></section></summary><div class="docblock"><p>Obtain plaintext data received from the peer over this TLS connection.</p>
<p>If the peer closes the TLS session cleanly, this fails with an error of
kind ErrorKind::ConnectionAborted once all the pending data has been read.
No further data can be received on that connection, so the underlying TCP
connection should closed too.</p>
<p>Note that support close notify varies in peer TLS libraries: many do not
support it and uncleanly close the TCP connection (this might be
vulnerable to truncation attacks depending on the application protocol).
This means applications using rustls must both handle ErrorKind::ConnectionAborted
from this function, <em>and</em> unexpected closure of the underlying TCP connection.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.read_vectored" class="method trait-impl has-srclink"><a href="#method.read_vectored" class="anchor"></a><h4 class="code-header">fn <a class="fnname">read_vectored</a>(&amp;mut self, bufs: &amp;mut [IoSliceMut&lt;'_&gt;]) -&gt; Result&lt;usize, Error&gt;</h4></section></summary><div class='docblock'>Like <code>read</code>, except that it reads into a slice of buffers. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.is_read_vectored" class="method trait-impl has-srclink"><a href="#method.is_read_vectored" class="anchor"></a><h4 class="code-header">fn <a class="fnname">is_read_vectored</a>(&amp;self) -&gt; bool</h4></section></summary><div class='docblock'>Determines if this <code>Read</code>er has an efficient <code>read_vectored</code>
implementation. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.read_to_end" class="method trait-impl has-srclink"><a href="#method.read_to_end" class="anchor"></a><h4 class="code-header">fn <a class="fnname">read_to_end</a>(&amp;mut self, buf: &amp;mut Vec&lt;u8, Global&gt;) -&gt; Result&lt;usize, Error&gt;</h4></section></summary><div class='docblock'>Read all bytes until EOF in this source, placing them into <code>buf</code>. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.read_to_string" class="method trait-impl has-srclink"><a href="#method.read_to_string" class="anchor"></a><h4 class="code-header">fn <a class="fnname">read_to_string</a>(&amp;mut self, buf: &amp;mut String) -&gt; Result&lt;usize, Error&gt;</h4></section></summary><div class='docblock'>Read all bytes until EOF in this source, appending them to <code>buf</code>. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.read_exact" class="method trait-impl has-srclink"><a href="#method.read_exact" class="anchor"></a><h4 class="code-header">fn <a class="fnname">read_exact</a>(&amp;mut self, buf: &amp;mut [u8]) -&gt; Result&lt;(), Error&gt;</h4></section></summary><div class='docblock'>Read the exact number of bytes required to fill <code>buf</code>. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.read_buf" class="method trait-impl has-srclink"><a href="#method.read_buf" class="anchor"></a><h4 class="code-header">fn <a class="fnname">read_buf</a>(&amp;mut self, buf: BorrowedCursor&lt;'_&gt;) -&gt; Result&lt;(), Error&gt;</h4></section></summary><div class='docblock'>Pull some bytes from this source into the specified buffer. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.read_buf_exact" class="method trait-impl has-srclink"><a href="#method.read_buf_exact" class="anchor"></a><h4 class="code-header">fn <a class="fnname">read_buf_exact</a>(&amp;mut self, cursor: BorrowedCursor&lt;'_&gt;) -&gt; Result&lt;(), Error&gt;</h4></section></summary><div class='docblock'>Read the exact number of bytes required to fill <code>cursor</code>. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.by_ref" class="method trait-impl has-srclink"><a href="#method.by_ref" class="anchor"></a><h4 class="code-header">fn <a class="fnname">by_ref</a>(&amp;mut self) -&gt; &amp;mut Self</h4></section></summary><div class='docblock'>Creates a “by reference” adaptor for this instance of <code>Read</code>. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.bytes" class="method trait-impl has-srclink"><a href="#method.bytes" class="anchor"></a><h4 class="code-header">fn <a class="fnname">bytes</a>(self) -&gt; Bytes&lt;Self&gt;</h4></section></summary><div class='docblock'>Transforms this <code>Read</code> instance to an [<code>Iterator</code>] over its bytes. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.chain" class="method trait-impl has-srclink"><a href="#method.chain" class="anchor"></a><h4 class="code-header">fn <a class="fnname">chain</a>&lt;R&gt;(self, next: R) -&gt; Chain&lt;Self, R&gt;<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: Read,</span></h4></section></summary><div class='docblock'>Creates an adapter which will chain this stream with another. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.take" class="method trait-impl has-srclink"><a href="#method.take" class="anchor"></a><h4 class="code-header">fn <a class="fnname">take</a>(self, limit: u64) -&gt; Take&lt;Self&gt;</h4></section></summary><div class='docblock'>Creates an adapter which will read at most <code>limit</code> bytes from it. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Session-for-ClientSession" class="impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#706-767">source</a><a href="#impl-Session-for-ClientSession" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="trait.Session.html" title="trait rustls::Session">Session</a> for <a class="struct" href="struct.ClientSession.html" title="struct rustls::ClientSession">ClientSession</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.write_tls" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#712-714">source</a><a href="#method.write_tls" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.write_tls" class="fnname">write_tls</a>(&amp;mut self, wr: &amp;mut dyn Write) -&gt; Result&lt;usize&gt;</h4></section></summary><div class="docblock"><p>Writes TLS messages to <code>wr</code>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.read_tls" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#707-709">source</a><a href="#method.read_tls" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.read_tls" class="fnname">read_tls</a>(&amp;mut self, rd: &amp;mut dyn Read) -&gt; Result&lt;usize&gt;</h4></section></summary><div class='docblock'>Read TLS content from <code>rd</code>. This method does internal
buffering, so <code>rd</code> can supply TLS messages in arbitrary-
sized chunks (like a socket or pipe might). <a href="trait.Session.html#tymethod.read_tls">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.process_new_packets" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#716-718">source</a><a href="#method.process_new_packets" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.process_new_packets" class="fnname">process_new_packets</a>(&amp;mut self) -&gt; Result&lt;(), <a class="enum" href="enum.TLSError.html" title="enum rustls::TLSError">TLSError</a>&gt;</h4></section></summary><div class='docblock'>Processes any new packets read by a previous call to <code>read_tls</code>.
Errors from this function relate to TLS protocol errors, and
are fatal to the session. Future calls after an error will do
no new work and will return the same error. <a href="trait.Session.html#tymethod.process_new_packets">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.wants_read" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#720-722">source</a><a href="#method.wants_read" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.wants_read" class="fnname">wants_read</a>(&amp;self) -&gt; bool</h4></section></summary><div class='docblock'>Returns true if the caller should call <code>read_tls</code> as soon
as possible. <a href="trait.Session.html#tymethod.wants_read">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.wants_write" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#724-726">source</a><a href="#method.wants_write" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.wants_write" class="fnname">wants_write</a>(&amp;self) -&gt; bool</h4></section></summary><div class='docblock'>Returns true if the caller should call <code>write_tls</code> as soon
as possible. <a href="trait.Session.html#tymethod.wants_write">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.is_handshaking" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#728-730">source</a><a href="#method.is_handshaking" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.is_handshaking" class="fnname">is_handshaking</a>(&amp;self) -&gt; bool</h4></section></summary><div class='docblock'>Returns true if the session is currently perform the TLS
handshake. During this time plaintext written to the
session is buffered in memory. <a href="trait.Session.html#tymethod.is_handshaking">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.set_buffer_limit" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#732-734">source</a><a href="#method.set_buffer_limit" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.set_buffer_limit" class="fnname">set_buffer_limit</a>(&amp;mut self, len: usize)</h4></section></summary><div class='docblock'>Sets a limit on the internal buffers used to buffer
unsent plaintext (prior to completing the TLS handshake)
and unsent TLS records. <a href="trait.Session.html#tymethod.set_buffer_limit">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.send_close_notify" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#736-738">source</a><a href="#method.send_close_notify" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.send_close_notify" class="fnname">send_close_notify</a>(&amp;mut self)</h4></section></summary><div class='docblock'>Queues a close_notify fatal alert to be sent in the next
<code>write_tls</code> call. This informs the peer that the
connection is being closed. <a href="trait.Session.html#tymethod.send_close_notify">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_peer_certificates" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#740-742">source</a><a href="#method.get_peer_certificates" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.get_peer_certificates" class="fnname">get_peer_certificates</a>(&amp;self) -&gt; Option&lt;Vec&lt;<a class="struct" href="struct.Certificate.html" title="struct rustls::Certificate">Certificate</a>&gt;&gt;</h4></section></summary><div class='docblock'>Retrieves the certificate chain used by the peer to authenticate. <a href="trait.Session.html#tymethod.get_peer_certificates">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_alpn_protocol" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#744-746">source</a><a href="#method.get_alpn_protocol" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.get_alpn_protocol" class="fnname">get_alpn_protocol</a>(&amp;self) -&gt; Option&lt;&amp;[u8]&gt;</h4></section></summary><div class='docblock'>Retrieves the protocol agreed with the peer via ALPN. <a href="trait.Session.html#tymethod.get_alpn_protocol">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_protocol_version" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#748-750">source</a><a href="#method.get_protocol_version" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.get_protocol_version" class="fnname">get_protocol_version</a>(&amp;self) -&gt; Option&lt;<a class="enum" href="internal/msgs/enums/enum.ProtocolVersion.html" title="enum rustls::internal::msgs::enums::ProtocolVersion">ProtocolVersion</a>&gt;</h4></section></summary><div class='docblock'>Retrieves the protocol version agreed with the peer. <a href="trait.Session.html#tymethod.get_protocol_version">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.export_keying_material" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#752-760">source</a><a href="#method.export_keying_material" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.export_keying_material" class="fnname">export_keying_material</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;&amp;self,<br>&nbsp;&nbsp;&nbsp;&nbsp;output: &amp;mut [u8],<br>&nbsp;&nbsp;&nbsp;&nbsp;label: &amp;[u8],<br>&nbsp;&nbsp;&nbsp;&nbsp;context: Option&lt;&amp;[u8]&gt;<br>) -&gt; Result&lt;(), <a class="enum" href="enum.TLSError.html" title="enum rustls::TLSError">TLSError</a>&gt;</h4></section></summary><div class='docblock'>Derives key material from the agreed session secrets. <a href="trait.Session.html#tymethod.export_keying_material">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_negotiated_ciphersuite" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#762-766">source</a><a href="#method.get_negotiated_ciphersuite" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#tymethod.get_negotiated_ciphersuite" class="fnname">get_negotiated_ciphersuite</a>(&amp;self) -&gt; Option&lt;&amp;'static <a class="struct" href="struct.SupportedCipherSuite.html" title="struct rustls::SupportedCipherSuite">SupportedCipherSuite</a>&gt;</h4></section></summary><div class='docblock'>Retrieves the ciphersuite agreed with the peer. <a href="trait.Session.html#tymethod.get_negotiated_ciphersuite">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.complete_io" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/session.rs.html#164-209">source</a><a href="#method.complete_io" class="anchor"></a><h4 class="code-header">fn <a href="trait.Session.html#method.complete_io" class="fnname">complete_io</a>&lt;T&gt;(&amp;mut self, io: &amp;mut T) -&gt; Result&lt;(usize, usize), Error&gt;<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;Self: Sized,<br>&nbsp;&nbsp;&nbsp;&nbsp;T: Read + Write,</span></h4></section></summary><div class='docblock'>This function uses <code>io</code> to complete any outstanding IO for
this session. <a href="trait.Session.html#method.complete_io">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Write-for-ClientSession" class="impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#787-814">source</a><a href="#impl-Write-for-ClientSession" class="anchor"></a><h3 class="code-header">impl Write for <a class="struct" href="struct.ClientSession.html" title="struct rustls::ClientSession">ClientSession</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.write" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#798-800">source</a><a href="#method.write" class="anchor"></a><h4 class="code-header">fn <a class="fnname">write</a>(&amp;mut self, buf: &amp;[u8]) -&gt; Result&lt;usize&gt;</h4></section></summary><div class="docblock"><p>Send the plaintext <code>buf</code> to the peer, encrypting
and authenticating it. Once this function succeeds
you should call <code>write_tls</code> which will output the
corresponding TLS records.</p>
<p>This function buffers plaintext sent before the
TLS handshake completes, and sends it as soon
as it can. This buffer is of <em>unlimited size</em> so
writing much data before it can be sent will
cause excess memory usage.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.write_vectored" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#802-808">source</a><a href="#method.write_vectored" class="anchor"></a><h4 class="code-header">fn <a class="fnname">write_vectored</a>(&amp;mut self, bufs: &amp;[IoSlice&lt;'_&gt;]) -&gt; Result&lt;usize&gt;</h4></section></summary><div class='docblock'>Like <a href="Write::write"><code>write</code></a>, except that it writes from a slice of buffers. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.flush" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rustls/client/mod.rs.html#810-813">source</a><a href="#method.flush" class="anchor"></a><h4 class="code-header">fn <a class="fnname">flush</a>(&amp;mut self) -&gt; Result&lt;()&gt;</h4></section></summary><div class='docblock'>Flush this output stream, ensuring that all intermediately buffered
contents reach their destination. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.is_write_vectored" class="method trait-impl has-srclink"><a href="#method.is_write_vectored" class="anchor"></a><h4 class="code-header">fn <a class="fnname">is_write_vectored</a>(&amp;self) -&gt; bool</h4></section></summary><div class='docblock'>Determines if this <code>Write</code>r has an efficient <a href="Write::write_vectored"><code>write_vectored</code></a>
implementation. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.write_all" class="method trait-impl has-srclink"><a href="#method.write_all" class="anchor"></a><h4 class="code-header">fn <a class="fnname">write_all</a>(&amp;mut self, buf: &amp;[u8]) -&gt; Result&lt;(), Error&gt;</h4></section></summary><div class='docblock'>Attempts to write an entire buffer into this writer. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.write_all_vectored" class="method trait-impl has-srclink"><a href="#method.write_all_vectored" class="anchor"></a><h4 class="code-header">fn <a class="fnname">write_all_vectored</a>(&amp;mut self, bufs: &amp;mut [IoSlice&lt;'_&gt;]) -&gt; Result&lt;(), Error&gt;</h4></section></summary><div class='docblock'>Attempts to write multiple buffers into this writer. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.write_fmt" class="method trait-impl has-srclink"><a href="#method.write_fmt" class="anchor"></a><h4 class="code-header">fn <a class="fnname">write_fmt</a>(&amp;mut self, fmt: Arguments&lt;'_&gt;) -&gt; Result&lt;(), Error&gt;</h4></section></summary><div class='docblock'>Writes a formatted string into this writer, returning any error
encountered. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.by_ref-1" class="method trait-impl has-srclink"><a href="#method.by_ref-1" class="anchor"></a><h4 class="code-header">fn <a class="fnname">by_ref</a>(&amp;mut self) -&gt; &amp;mut Self</h4></section></summary><div class='docblock'>Creates a “by reference” adapter for this instance of <code>Write</code>. <a>Read more</a></div></details></div></details></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-ClientSession" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-ClientSession" class="anchor"></a><h3 class="code-header">impl !RefUnwindSafe for <a class="struct" href="struct.ClientSession.html" title="struct rustls::ClientSession">ClientSession</a></h3></section><section id="impl-Send-for-ClientSession" class="impl has-srclink"><a href="#impl-Send-for-ClientSession" class="anchor"></a><h3 class="code-header">impl Send for <a class="struct" href="struct.ClientSession.html" title="struct rustls::ClientSession">ClientSession</a></h3></section><section id="impl-Sync-for-ClientSession" class="impl has-srclink"><a href="#impl-Sync-for-ClientSession" class="anchor"></a><h3 class="code-header">impl Sync for <a class="struct" href="struct.ClientSession.html" title="struct rustls::ClientSession">ClientSession</a></h3></section><section id="impl-Unpin-for-ClientSession" class="impl has-srclink"><a href="#impl-Unpin-for-ClientSession" class="anchor"></a><h3 class="code-header">impl Unpin for <a class="struct" href="struct.ClientSession.html" title="struct rustls::ClientSession">ClientSession</a></h3></section><section id="impl-UnwindSafe-for-ClientSession" class="impl has-srclink"><a href="#impl-UnwindSafe-for-ClientSession" class="anchor"></a><h3 class="code-header">impl !UnwindSafe for <a class="struct" href="struct.ClientSession.html" title="struct rustls::ClientSession">ClientSession</a></h3></section></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Any-for-ClientSession" class="impl has-srclink"><a href="#impl-Any-for-ClientSession" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; Any for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: 'static + ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl has-srclink"><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a class="fnname">type_id</a>(&amp;self) -&gt; TypeId</h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-ClientSession" class="impl has-srclink"><a href="#impl-Borrow%3CT%3E-for-ClientSession" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; Borrow&lt;T&gt; for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow</a>(&amp;self) -&gt; &amp;T</h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-ClientSession" class="impl has-srclink"><a href="#impl-BorrowMut%3CT%3E-for-ClientSession" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; BorrowMut&lt;T&gt; for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow_mut</a>(&amp;mut self) -&gt; &amp;mut T</h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-ClientSession" class="impl has-srclink"><a href="#impl-From%3CT%3E-for-ClientSession" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; From&lt;T&gt; for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">from</a>(t: T) -&gt; T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-ClientSession" class="impl has-srclink"><a href="#impl-Into%3CU%3E-for-ClientSession" class="anchor"></a><h3 class="code-header">impl&lt;T, U&gt; Into&lt;U&gt; for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: From&lt;T&gt;,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">into</a>(self) -&gt; U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
<p>That is, this conversion is whatever the implementation of
<code>[From]&lt;T&gt; for U</code> chooses to do.</p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-ClientSession" class="impl has-srclink"><a href="#impl-TryFrom%3CU%3E-for-ClientSession" class="anchor"></a><h3 class="code-header">impl&lt;T, U&gt; TryFrom&lt;U&gt; for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: Into&lt;T&gt;,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = Infallible</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_from</a>(value: U) -&gt; Result&lt;T, &lt;T as TryFrom&lt;U&gt;&gt;::Error&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-ClientSession" class="impl has-srclink"><a href="#impl-TryInto%3CU%3E-for-ClientSession" class="anchor"></a><h3 class="code-header">impl&lt;T, U&gt; TryInto&lt;U&gt; for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: TryFrom&lt;T&gt;,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = &lt;U as TryFrom&lt;T&gt;&gt;::Error</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_into</a>(self) -&gt; Result&lt;U, &lt;U as TryFrom&lt;T&gt;&gt;::Error&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="rustls" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html>