Question

I’m currently working on a simple Python script that connects to an IP/Port and lets you preform commands. Kinda like telnet. I want it to connect to lets say MySQL(Just an example) and execute MySQL commands like you would with Telnet or NetCat.
But lets say I connect to a service, I can’t execute commands. I’m trying to connect to a custom port on localhost. Let me show the code:

try:
    sock.connect((host, port))
    recvdata = sock.recv(socksize)
    print("Type your commands now")
    while(1): #Setting a loop
        print(recvdata)
        userInput = raw_input(">")
        sock.send(userInput + '\r\n\r\n')
        print(recvdata)
except KeyboardInterrupt:
    print("\nConnection closed")
    sys.exit()

So this is what I get when I connect:

:: !Test service! ::

If I type anything, I just get the banner again. The same banner over and over no matter what.

Answer 1

Your recvdata = sock.recv(socksize) is outside of the recv loop. I think, a good introduction to socket programming in Python might be helpful to you. Your previous question and this one would have been easily spotted by you using that introduction tutorial. Have a look at an example socket echo server/client (at this site), which you can modify further and proceed with your task. Run two separate terminals, run the echo server at one end and use the echo client with address pointint to 127.0.0.1.