Design and implement a simple file transfer system, i.e., create a file transfer server and a file transfer client.

The server is in C and the client is in Python 2.7

To compile the server, run:

gcc -Wall -o ftserver ftserver.c

In the root directory. Then execute the server as follows: ./ftserver <portNumber>.

Note: I was unable to implement immediate SIGTERM handling. So when you Ctrl-C to exit the server, the server will shut down gracefully AFTER the next client request. This is a very annoying problem but it is due to the accept() call blocking everything, including the SIGTERM handler.

To run the client, you have to pass the keyword arguments as follows:

python ftclient.py --server_host=<server_host> --server_port=<server_port> --command=<command> --file=<file> --data_port=<data_port>

Arguments List:

• --server_host or -sh
  • specify host you want to connect to
  • required
• --server_portor -sp
  • specify the server port you want to connect to
  • required
• --command or -c
  • specify the command you want to execute on the server: either (-l or -g)`
  • required
• --filename or -f
  • specify the file you want to get (if issuing a get command)`
  • required with -g
• --data_port or -dp
  • specify the data port you want to transfer using
  • required

Note: The --file argument only goes with -g command.

python ftclient.py --server_host=flip1.engr.oregonstate.edu --server_port=50010 --command=-l --data_port=50011

python ftclient.py --server_host=flip1.engr.oregonstate.edu --server_port=50011 --command=-g --file=binny.bin --data_port=50011

• Known Extra Credit: The Get File command -g works with non-text files. For example, transfer the included binary binny.bin or the included image file kitt.png. Even the ftserver.c works.
• Possible Extras:
  • Arguments support short and long forms (e.g. -c or --c) and have very strict validation
  • Error handling and interaction messages are graphically-displayed and detailed
  • Both programs clean up after themselves (close the sockets) and can re-use the same ports over and over