How to measure ping latency in flash/red5 mediaserver

Only thing I found is QoS statistic in NetConnection.info, but it does not contain any kind of latency values.

In red5 API "IConnection.getLastPingTime()"开发者_Python百科 exists, is it accessible over standard Flex API or I need to poll it by RMI calls?

Jake Hilton wrote a port testing application (source available) which may help you or set you in the right direction. http://www.jakehilton.com/?q=node/43
As far as the IConnection methods we offer on the server side, a lot of these must be exposed if you want to call them directly from Flash/Flex application.