iRule to use a pool based in incoming port ?

when CLIENT_ACCPEPTED {

 Try assigning the pool based on the client destination port
 If the pool assignment fails, use the VS default pool
if {[catch {pool pool_[TCP::local_port]} result]}{
 Pool did not exist, so log the value for testing
 The VS default pool will be used
log local0. "pool_[TCP::local_port] doe not exist"
} else {
 Pool assignment succeeded
}
}