title: MacOSX: how to capture network events? Or: how does Private-Eye works?
body: <p>I stumbled upon <a href="http://radiosilenceapp.com/private-eye">Private Eye</a> and wonder how it works.</p>
  
  <p>I.e. what APIs it is using to get those information (all incoming/outcoming network connections and the application using it)?</p>
  
  <p>It is installing a kext. Is that needed?</p>