ode>pair_original_dest</code>. (Cookie is not used here because it cannot be obtained in the <code>get_sockopt</code> program).</li><li>After Envoy receives the connection, it will call the <code>get_sockopt</code> function to read the destination address of the current connection. <code>get_sockopt</code> will extract and return the original destination address from <code>pair_original_dst</code>, according to the quadruple information. Thus, the connection is completely established.</li><li>In the data tr