| TCP Client Server Programming 1
1. Objective
The objective of this first programming project is to learn TCP iterative client-server interaction using
socket interface in C programming language. After completing the project, you will have a basic
understanding of the steps required to develop a networking application.
2. Project Specification
In this project, you are required to do socket programming in C programming to implement a pair of
client and server that can achieve simple password verification to indicate the Bitcoin value. Your
client will send a pair of cu
ency name and password to your server and your server will verify
whether the pair of cu
ency name and password is legitimate or not for retrieving the Bitcoin value.
Allow up to 3 clients to simultaneously connect to the server. Assume the only legitimate pairs of
cu
ency names and passwords that will be accepted by your server are as follows:
Cu
ency Name Password Bitcoin value
US Dollar uCh781fY XXXXXXXXXX
Canadian Dollar Cfw61RqV XXXXXXXXXX
Euro Pd82bG XXXXXXXXXX
British Pound Crc51RqV XXXXXXXXXX
Japanese Yen wD82bV XXXXXXXXXX
Swiss Franc G6M7p8az XXXXXXXXXX
For example. If the Client sends a pair of cu
ency and password values as: "US Dollar" and
"uCh781fY", the server retrieves the Bitcoin value as XXXXXXXXXX.
CS5133: Data Networks
Project-1
TCP Client Server Programming
Due Date:
Upload to Canvas
10/9 10/2022
100 pts
Fall - 2022
| TCP Client Server Programming 2
:
:
:
:
:
Client 1
Client n
Serve
Bitcoin value
| TCP Client Server Programming 3
Your client and server programs entail to achieve the following requirements:
1. Your client program needs to take two arguments that specify the name of server and the port
that it is trying to connect to. Your program for server needs to take an argument that specifies
the port that it is listening to. You can use (5000+last 4 digits of your student-id number) to avoid
equesting same port by multiple students.
2. The server program will start first and keep listening to the specified port. Your client will connect
to the port that your server is listening to, and a socket between your client and server is
constructed.
3. Initially as there are 2 servers present, the client needs to connect to the server which is less busy
than the other server. You can use random function in C to find out the load on a server. So the
servers reply between 0-1. (For example, if server 1 replies 0.1 and server 2 replies with 0.5, then
the client will select server 1 as its less busy).
4. Once the server replies to the client, the client needs to decide which server to connect, it should
connect to the server which is less busy.
5.3. After successful startup, the server program will ask the clients to join the server and maximum
number of clients (i.e., 3) can join the server for retrieving the Bitcoin value.
6.4. Your client program will first prompt a welcome message that asks the user to enter a cu
ency
name using the keyboard. This cu
ency name will then be sent to the server. Then, your server,
after receiving the cu
ency name from your client, will send an acknowledgment message to the
client.
7.5. Your client, after receiving the acknowledgment message from your server, will prompt a message
that asks the user to enter the co
esponding password. This password will then be sent to the
server. Then, your server, after receiving the password from your client, will verify the received
pair of cu
ency name and password against the list of legitimate pairs. If the result is positive, the
server will send a success message along with the cu
ent Bitcoin value for the cu
ency to the
client. If the result is negative, the server will send a failure message to the client.
8.6. Your client, after receiving the result message (i.e., Bitcoin value), will print out the result. Then,
the client sends “QUIT” message to close the socket. Your server will close the socket following
the client and keep listening for the next client request.
9.7. Your server will close the socket after waiting for the cu
ency name or the password for 30
seconds.
3. Programming Notes
I suggest you start modifying the TCP server program and TCP client program given in the Project 0. Your
server program needs to handle cu
ency name and password for authentication. I would recommend
you to store the cu
ency name, password, and Bitcoin values in the TCP server program as an A
ay of
Strings. However, other forms of key-value pairs, such as Dictionary, etc. are also accepted.
File names:
Make sure you follow the file name guideline given below for your project:
lastNameP1Client.c, and lastNameP1Server.c
4. Points Distribution
| TCP Client Server Programming 4
Components Points
Client Program 35
Server Program 35
Program Style (Coding style, comments etc.) 10
Documentation 20
5. Submission Instructions:
This project requires the submission of a soft copy.
Soft Copy (Due October 9 10, 2022, 11:59 pm)
The soft copy should consist of:
• source code of the Client program,
• source code of the Server program,
• any header file(s), and
• detailed documentation should consist of:
o discussion of your problem-solving approach
o detailed analysis of data structures, algorithms, and user define functions
o any legitimate assumption(s) with justification, and
o screen shots of outputs
These must be submitted through Canvas (http:
canvas.ou.edu).
6. Late Penalty:
You have to submit your project on or before the due date to avoid any late penalty. A late penalty of
15% per day will be imposed after the due date. After one week from the due date, you will not be
allowed to submit the project under any circumstances.
Good Luck!!