Modifying TCP Data

I’m looking at adding some additional software to missionplanner C# solution to add additional security when data is being transmitted back and forth across the radios. I’m using two 900MHz radio’s that communicate back forth via sockets so I have been able to connect to them with the mission planner using a tcp connection. My question is where in the mission planner solution should I look to find where tcp data is being received/sent. Should I be looking in teh CommsCPSerial.cs? I’m familiar with C/C++ so the C# doesn’t look too bad to figure out. I’m looking at using the MTE security software from Eclypses to secure the wireless data between missionplanner and the radio. Any input would be greatly appreciated.