title: pcap_dispatch/passing arguments to the callback function
body: <pre><code>int pcap_dispatch(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
  </code></pre>
  
  <p>I understand that <code>pcap_dispatch</code> calls the callback routine upon receiving a packet and the first argument passed on to the callback routine is the last argument to the <code>pcap_dipatch</code> function. So what about the remaining two arguments of the callback routine. where does the <code>pcap_dispatch</code> get the other arguments to be passed on?</p>