title: Scapy sniffer: associate sent packet with received answer
body: <p>I am pretty new to packet sniffing, so my apologies if the question is very easy to answer. I have been playing with Scapy lately for sniffing some packets sent between two servers. However, I would like to check what the second server answered to the request.</p>
  
  <p>I was able to capture both packets in my logs, but I still don't get how to match them to what answers goes with which request. I have tried googling it, but did not get anything on this matter.</p>
  
  <p>Note that Scapy is NOT sending the packet, it is just sniffing everything. Is it possible to associate the correct request/answer?</p>
  
  <p>Thank you in advance!</p>