ree base classes that the <a class="reference external" href="reference-Plugins.html#plugin">plugin</a> may
implement. These are called <a class="reference external" href="reference-Plugins.html#plugin">plugin</a>, <a class="reference external" href="reference-Plugins.html#torrent_plugin">torrent_plugin</a> and <a class="reference external" href="reference-Plugins.html#peer_plugin">peer_plugin</a>.
They are found in the <tt class="docutils literal">&lt;libtorrent/extensions.hpp&gt;</tt> header.</p>
<p>These