add socketDescriptor() method to ESL::Connection obj

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13770 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/esl/src/esl_oop.cpp

@@ -33,6 +33,16 @@ ESLconnection::~ESLconnection()
 
 }
 
+int ESLconnection::socketDescriptor()
+{
+	if (handle.connected) {
+        return (int) handle.sock;
+    }
+
+	return -1;
+}
+
+
 int ESLconnection::disconnect()
 {
 	if (handle.connected) {