End-To-End Detection of Network Compression

How to Build Program

1. Build the mjson.o file:

   gcc -g -c -o mjson.o mjson.c
   

2. Make the executable for client, server, and standalone:

   make client
   make server
   make standalone
   

3. Run the server:

   ./server myconfig.json
   

4. Run the client:

   ./client myconfig.json
   

5. After the server and client finished executing, run the standalone program.

6. Run standalone using sudo:

   sudo ./standalone myconfig.json
   

Incomplete Required Features of Program

1. Not able to receive RST packets from closed ports:

   • Unable to implement timer correctly.

2. Minor:

   • Was not able to exit the while loop on the server side when receiving a packet train without receiving a "done" message from the client.
   • Aim to find a way to implement exiting the while loop while the last packet of the packet train is receiving without having to waste resources sending a "done" message.

What to Expect While Running Programs (Print Statements Indicating Success or Failure)

• [+] indicates successful operation. If a print statement does not have a [+], an error/failure occurred during the operation and exits the program.

Client:

1. Pre-Probing Phase:

   • Socket creation.
   • Connection to server.
   • Sending JSON file contents to server.
   • Closing connection to server.

2. Probing Phase:

   • Socket creation.
   • Setting DF flag for UDP packets.
   • Sending the first packet of Low Entropy Train.
   • Sending the last packet of Low Entropy Train.
   • Sending "done" message to server.
   • Waiting Inter-Measurement time.
   • Sending the first packet of High Entropy Train.
   • Sending the last packet of High Entropy Train.
   • Sending "done" message to server.
   • Statement indicating if both packet trains were sent successfully.

3. Post-Probing Phase:

   • Socket creation.
   • Connection to server.
   • Prints the findings of compression detection.
   • Closing connection to server.

Server:

1. Pre-Probing Phase:

   • Prints Server IP and TCP for reference and confirmation of correct parsing of JSON file.
   • Socket creation.
   • Binding socket to port.
   • Listening for any incoming connections from client.
   • Prints IP and Port # of client if connection is established.
   • Prints the file contents received from client.
   • Statement if parsing of the JSON was successful.
   • Closing connection to client.

2. Probing Phase:

   • Socket creation.
   • Binding socket to port.
   • Number of packets received from Low Entropy Train.
   • Number of packets received from High Entropy Train.
   • Compression time of Low Entropy Train.
   • Compression time of High Entropy Train.

3. Post-Probing Phase:

   • Compression time of Low Entropy Train.
   • Compression time of High Entropy Train.
   • Socket creation.
   • Binding socket to port.
   • Listening to client.
   • Prints IP and Port # of client if connection is established.
   • Sending compression findings to client.
   • Closing connection to client.