n> Safe.
      </p>
<p>
        <span class="emphasis"><em>Shared</em></span> <span class="emphasis"><em>objects:</em></span> Safe.
      </p>
<h5>
<a name="boost_asio.reference.ip__icmp.h4"></a>
        <span class="phrase"><a name="boost_asio.reference.ip__icmp.requirements"></a></span><a class="link" href="ip__icmp.html#boost_asio.reference.ip__icmp.requirements">Requirements</a>
      </h5>
<p>
        <span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/ip/icmp.hpp</code>
   