Use iRules to query number of active connections against a node

Is there any way to use an iRule to query how many active connections are currently on a node using the node IP and destination port as the query value (I mean, if the same node is also listening on other ports I don't want those connections to count).

i understand irule sits in data plane but stats you are looking for is in control/management plane. i do not think there is straight way to get that stats in irule. of course, there is a tricky way such as icall, external script, etc.