* plugin that caused the call.
*
* @param recv_cb function to call when data is received
+ * @param register_quota_cb function to call to register a quota callback
+ * @param unregister_quota_cb function to call to unregister a quota callback
* @param address_cb function to call when our public addresses changed
* @param session_start_cb function to call when a session was created
* @param session_end_cb function to call when a session was terminated