code: func servicePortChainName(servicePortName string, protocol string) utiliptables.Chain {
  	return utiliptables.Chain("KUBE-SVC-" + portProtoHash(servicePortName, protocol))
  }
docs: // servicePortChainName takes the ServicePortName for a service and
  // returns the associated iptables chain.  This is computed by hashing (sha256)
  // then encoding to base32 and truncating with the prefix "KUBE-SVC-".