<b>This is an internal method, use at your own risk.</b>
</p>


<!-- getfd +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->

<p class=name id="getfd">
master:<b>getfd()</b><br>
client:<b>getfd()</b><br>
server:<b>getfd()</b>
</p>

<p class=description>
Returns the underling socket descriptor or handle associated to the object.
</p>

<p class=return>
The descriptor or handle. In case the object has been closed, the return will be -1.
</p>

<p class=note>
Note: <b>This is an internal method. 