Banking Server

This project is a simple C-based banking system using TCP sockets for client-server communication. The server handles account operations, and the client acts as a terminal for sending commands.

Features

• Server uses I/O multiplexing using (select()) to handle multiple clients
• Supports operations like:
  1. OPEN
  2. CLOSE
  3. DEPOSIT
  4. WITHDRAW
  5. BALANCE
  6. STATEMENT
  7. QUIT

Build Instructions

You'll need a Unix environment and gcc installed

1. Clone the Repo

git clone https://github.com/P-AlaKara/Multiplexing
cd Multiplexing

2. Compile the Server

gcc server.c banking.c -o server

3. Compile the Client

gcc client.c -o client

TIP: Make sure bank.c and bank.h are present in the same directory as server.c. TIP2: Update the IP in client.c to your server's IP (default is 192.168.1.99). If localhost, use 127.0.0.1

Running the Programs

1. Start the Server

./server

Listens on port 8080 by default.

2. Connect with a Client

./client

Command Format

All commands must end with a semicolon ;, and fields are comma-separated.

Example Commands

OPEN, John, 123456789, savings, 10000, 1234;
DEPOSIT, 100001, 1234, 2000;
WITHDRAW, 100001, 1234, 500;
BALANCE, 100001, 1234;
STATEMENT, 100001, 1234;
CLOSE, 100001, 1234;
QUIT;

DON'T FORGET THE SEMICOLON!!

Appendix

• Programming language: C
• Networking: TCP (IPv4)
• Server concurrency: select()-based I/O multiplexing
• Data storage: File-based (accounts_data.txt)
• Max clients: Defined by FD_SETSIZE

Credits

banking.c was developed by @NajmaMohamed