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Lab 4 - ---
Networking Fundamentals (41092)
University of Technology Sydney
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Week4 Lab: Socket Programming
Procedure for running the Python UDP and TCP client and server
Setup Project:
You should have installed Python and PyCharm. Note that the Linux and MacOS machines
has existing Python 2 and Windows machines are running python 3, so there are some minor
differences between the programs for the two operating systems. Our sample codes use
Python 3.
1) In PyCharm, create a project, ClientServer
2) Copy and paste the code from the end of this document (Appendix) into four separate files in
the project: TCPServer, UDPServer, TCPClient and UDPClient
3) Find your PC’s IP address
a. in Windows:
i. type “cmd” in the search box on windows and pressing <ENTER>
ii. In the command window type “ipconfig” to find your IP address.
b. in MacOS:
i. type “terminal” in the search box and pressing <ENTER>
ii. in the terminal window, type “ifconfig” to find you IP address
Run your programs
4) run UDP server in PyCharm – screenshot below:
5) Run UDP Client in PyCharm
Add server IP address to the Client file, and run the client file.
The program will prompt you for a string of characters. Enter lower case sentence and
<ENTER>.
If everything has been properly configured you string should be returned in all upper case.
6) For TCP Server and Client: the procedure is the same for setting up and running.
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(T5) (Optional – if there is another PC available in your network.) Find out the IP addresses
of the machine next to you. Modify your server code so that it can access servers running on
those machines. You could hard code in the server addresses or pass the data as part of the
command line or have the program prompt the user for the IP address.
Appendix. Python Code for Week4 Lab
UDPServer
from socket import * serverPort = 12000 serverSocket = socket(AF_INET, SOCK_DGRAM) serverSocket(('', serverPort)) print("The server is ready to receive") while True: message, clientAddress = serverSocket( 2048 ) modifiedMessage = message().upper() serverSocket(modifiedMessage(), clientAddress)
UDPClient
from socket import * serverName = '192.168.0' serverPort = 12000 clientSocket = socket(AF_INET, SOCK_DGRAM) message = input('Input lowercase sentence:') clientSocket(message(),(serverName, serverPort)) modifiedMessage, serverAddress = clientSocket( 2048 ) print(modifiedMessage()) clientSocket()
TCPServer
from socket import * serverPort = 12000 serverSocket = socket(AF_INET, SOCK_STREAM) serverSocket(('', serverPort)) serverSocket( 1 ) print("The server is ready to receive") while True: connectionSocket, addr = serverSocket() sentence = connectionSocket( 1024 ).decode() capitalizedSentence = sentence() connectionSocket(capitalizedSentence()) connectionSocket()
TCPClient
from socket import * serverName = '192.168.0' serverPort = 12000 clientSocket = socket(AF_INET, SOCK_STREAM) clientSocket((serverName, serverPort)) sentence = input('Input a lower case sentence : ') clientSocket(sentence()) modifiedSentence = clientSocket( 1024 ) print('From Server : ' + modifiedSentence()) clientSocket() print("complete")
Lab 4 - ---
Course: Networking Fundamentals (41092)
University: University of Technology Sydney
