import jenkins.model.*
import hudson.remoting.Launcher
import hudson.slaves.SlaveComputer

def expectedVersion = Launcher.VERSION

for (computer in Jenkins.instance.getComputers()) {
	if (! (computer instanceof SlaveComputer)) continue
    if (!computer.getChannel()) continue
	
    def version = computer.getSlaveVersion()
	if (!expectedVersion.equals(version)) {
		println "${computer.name} - expected ${expectedVersion} but got ${version}"
	}
}