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+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_asio.reference.ip__multicast__enable_loopback"></a><a class="link" href="ip__multicast__enable_loopback.html" title="ip::multicast::enable_loopback">ip::multicast::enable_loopback</a>
+</h3></div></div></div>
+<p>
+        <a class="indexterm" name="idp151058608"></a> 
+Socket option determining whether outgoing
+        multicast packets will be received on the same socket if it is a member of
+        the multicast group.
+      </p>
+<pre class="programlisting"><span class="keyword">typedef</span> <span class="identifier">implementation_defined</span> <span class="identifier">enable_loopback</span><span class="special">;</span>
+</pre>
+<p>
+        Implements the IPPROTO_IP/IP_MULTICAST_LOOP socket option.
+      </p>
+<h5>
+<a name="boost_asio.reference.ip__multicast__enable_loopback.h0"></a>
+        <span class="phrase"><a name="boost_asio.reference.ip__multicast__enable_loopback.examples"></a></span><a class="link" href="ip__multicast__enable_loopback.html#boost_asio.reference.ip__multicast__enable_loopback.examples">Examples</a>
+      </h5>
+<p>
+        Setting the option:
+      </p>
+<pre class="programlisting"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">udp</span><span class="special">::</span><span class="identifier">socket</span> <span class="identifier">socket</span><span class="special">(</span><span class="identifier">io_service</span><span class="special">);</span>
+<span class="special">...</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">multicast</span><span class="special">::</span><span class="identifier">enable_loopback</span> <span class="identifier">option</span><span class="special">(</span><span class="keyword">true</span><span class="special">);</span>
+<span class="identifier">socket</span><span class="special">.</span><span class="identifier">set_option</span><span class="special">(</span><span class="identifier">option</span><span class="special">);</span>
+</pre>
+<p>
+        Getting the current option value:
+      </p>
+<pre class="programlisting"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">udp</span><span class="special">::</span><span class="identifier">socket</span> <span class="identifier">socket</span><span class="special">(</span><span class="identifier">io_service</span><span class="special">);</span>
+<span class="special">...</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">multicast</span><span class="special">::</span><span class="identifier">enable_loopback</span> <span class="identifier">option</span><span class="special">;</span>
+<span class="identifier">socket</span><span class="special">.</span><span class="identifier">get_option</span><span class="special">(</span><span class="identifier">option</span><span class="special">);</span>
+<span class="keyword">bool</span> <span class="identifier">is_set</span> <span class="special">=</span> <span class="identifier">option</span><span class="special">.</span><span class="identifier">value</span><span class="special">();</span>
+</pre>
+<h5>
+<a name="boost_asio.reference.ip__multicast__enable_loopback.h1"></a>
+        <span class="phrase"><a name="boost_asio.reference.ip__multicast__enable_loopback.requirements"></a></span><a class="link" href="ip__multicast__enable_loopback.html#boost_asio.reference.ip__multicast__enable_loopback.requirements">Requirements</a>
+      </h5>
+<p>
+        <span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/ip/multicast.hpp</code>
+      </p>
+<p>
+        <span class="emphasis"><em>Convenience header: </em></span><code class="literal">boost/asio.hpp</code>
+      </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2017 Christopher M. Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
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