code: func protocolToString(proto Protocol) string {
  	switch proto {
  	case syscall.IPPROTO_TCP:
  		return "TCP"
  	case syscall.IPPROTO_UDP:
  		return "UDP"
  	case syscall.IPPROTO_SCTP:
  		return "SCTP"
  	}
  	return ""
  }
docs: // protocolTypeToString returns the name for the given protocol.