Lab 5 TCP Sockets: Debug Logging Server

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ECE 4122/6122 Lab 5 (100 pts)

You can write, debug and test your code locally on your personal computer. However, the code you
submit must compile and run correctly on the PACE-ICE server.
In this homework you will need to develop two executable programs. One program for the server and
one for the client.
TCP Sockets: Debug Logging Server
In real world applications debug/status messages from applications are often sent to a central
logging server so that any issues that may occur can be investigated as to the cause. In this
assignment you will be creating a TCP debug logging server.
Server-70 points
Write a console program that takes as a single command line argument the port number on
which the TCP Server will listen for connection requests. Your server application needs to be
able to maintain the connections from any number of clients. The clients will be sending text
string messages that the server will save in a file called server.log in the same directory as the
server application. The server will add a newline character to the end of each message when
saving to the text file. The messages will be logged as follows:
date & time :: ip_address of client :: message string
Sun Nov 6 20:07:41 2022 :: :: DANGER Will Robinson!!
All messages shall be appended to the server.log file if it already exists, otherwise a new file will
be created. The server logs when clients connect and disconnect using the following format:
Sun Nov 6 20:07:41 2022 :: :: Connected
Sun Nov 6 20:07:41 2022 :: :: Disconnected
Example how to output time format
Client-30 points
You need to write a client console program that takes as a command line argument the IP
Address and port number of the server as shown below:
./a.out localhost 61717
The program should continuously prompt the user for messages to send to the server. The
client disconnects and terminates when the user enters the message: quit
Here is example prompting the user for messages
Please enter a message: your string message1
Please enter a message: your string message2
Please enter a message: your string message3
Testing your assignment:
1. Make sure that you test your server using multiple clients.
2. Make sure that your server can handle clients closing and reconnecting.
3. Make sure that both your server and client check the command line arguments for
invalid entries:
a. Negative port numbers
b. Non numeric values
c. Port number outside the range 61000-65535
d. If an invalid command line is detected then the following message should be
displayed showing the invalid value:
Invalid command line argument detected: <invalid argument>
Please check your values and press any key to end the program!
4. If the client application is not able to connect to the server, then client shall display the
following error message in the console window:
Failed to connect to the server at <IP address entered> on <port num>.
Please check your values and press any key to end program!
Submitting your assignment:
Submit two zip files. containing the files needed to compile and build your server application. containing the files needed to compile and build your client application.
Appendix A: Coding Standards
When using if/for/while statements, make sure you indent 4 spaces for the content inside those. Also
make sure that you use spaces to make the code more readable.
For example:
for (int i; i < 10; i++)
j = j + i;
If you have nested statements, you should use multiple indentions. Each { should be on its own line (like
the for loop) If you have else or else if statements after your if statement, they should be on their own
for (int i; i < 10; i++)
if (i < 5)
k -= i;
k +=1;
j += i;
Camel Case:
This naming convention has the first letter of the variable be lower case, and the first letter in each new
word be capitalized (e.g. firstSecondThird). This applies for functions and member functions as well! The
main exception to this is class names, where the first letter should also be capitalized.
Variable and Function Names:
Your variable and function names should be clear about what that variable or function is. Do not use one
letter variables, but use abbreviations when it is appropriate (for example: “imag” instead of
“imaginary”). The more descriptive your variable and function names are, the more readable your code
will be. This is the idea behind self-documenting code.
File Headers:
Every file should have the following header at the top
Author: <your name>
Class: ECE4122 or ECE6122
Last Date Modified: <date>
What is the purpose of this file?
Code Comments:
1. Every function must have a comment section describing the purpose of the function, the input
and output parameters, the return value (if any).
2. Every class must have a comment section to describe the purpose of the class.
3. Comments need to be placed inside of functions/loops to assist in the understanding of the flow
of the code.


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