Socket Programming

Project preview

Note: Can find the source code at myGithub.

Project Overview: Designed to improve skills in UNIX socket programming, Dormitory Reservation Systems play a crucial role in managing student housing efficiently, also adding authentication by requiring usernames and passwords, to achieve a secure and reliable online booking system for dormitories.

Features

  1. Client Interaction:
  • Members: Can log in, check room availability, and book rooms. Booking a room updates the room availability in the backend server’s data structure.
  • Guests: Can only check room availability. If the password field is skipped, the user is treated as a Guest.
  1. Servers:
  • Main Server (ServerM): Authenticates user identities and coordinates with backend servers.
  • Backend Servers (Single (S), Double (D), Suite (U)): Each server manages information specific to a room type, handling the details of room availability and bookings.

Demonstration

use following example to demonstrate the output: James, SODids392, S233, Reservation

1. Client console output:
Client is up and running.
Please enter the username: James
Please enter the password: SODids392
James sent an authentication request to the main server.
Welcome member James!
Please enter the room code: S233
Would you like to search for the availability or make a reservation? (Enter "Availability" to search for the availability or Enter "Reservation" to make a reservation ): Reservation
James sent an reservation request to the main server.
The client received the response from the main server using TCP over port 62261.
Congratulation! The reservation for Room S233 has been made.

-----Start a new request-----
Please enter the room code:

2. ServerM output:
Server is up and running.
The main server has received the room status from Server S using UDP over port 44720.
The main server has received the room status from Server D using UDP over port 44720.
The main server has received the room status from Server U using UDP over port 44720.
The main server received the authentication for James using TCP over port 45720.
The main server sent the authentication result to the client.
The main server has received the reservation request on Room S233 from James using TCP over port 45720.
The main server sent a request to Server S.
The main server has received the reservation request on Room S233 from James using TCP over port 45720.
The main server sent the reservation result to the client.

3.ServerS output:
The Server S is up and running using UDP on port 41720.
The Server S has sent the room status to the main server.
The Server S received a reservation request from the main server.
Successful reservation. The count of room S233 is now 5.
The Server S finished sending the response and the updated room status to the main server.