Shared Memory & Data Synchronization Using Unix Domain Sockets 🌐🔗🔐

Overview 📖

Achieve data synchronization between processes running on the same machine using IPC. Our project leverages both shared memory and Unix domain sockets to ensure consistent communication and synchronization between processes.

  +--------+       +------------+       +--------+
  | Client |<----->| Unix Domain|<----->| Server |
  +---|----+       |   Sockets  |       |---|----+
      |            +------------+           ^
      | Signal                             | Signal
      v            +------------+           v
      |            | Shared Mem |           |
  +---|----+       +------------+       +---|----+
  | Client |            ^                | Server |
  +--------+            |                | Process|
                        | Signal        +--------+
                        v
                   +------------+
                   | Data Sync  |
                   +------------+

Features 🚀

1. Routing Table Manager (RTM) with Signal Handling 📡🚦

• 🖥 Manages the L3 routing table.
• 🧮 Incorporates an ARP (Address Resolution Protocol) table.
• 📤 Sends notifications of any changes.
• ✅ Ensures consistent table state across all connected clients.
• 📟 Uses signal handling to notify clients about major events like flushing tables.

+---------------------+
|      RTM TABLE      |
+---------------------+
|   Destination   |   Gateway   |   Interface   |
+-----------------|-------------|---------------|
|   192.168.1.0   |  10.0.0.1   |      eth0     |
+-----------------|-------------|---------------|
|   10.0.1.0      |  10.0.0.2   |      eth1     |
+-----------------|-------------|---------------|
|        ...      |     ...     |       ...     |
+-----------------|-------------|---------------|

+--------------------------------------------------+
|                  ARP TABLE      |
+--------------------------------------------------+
|   MAC Address     |   IP Address in Shared Mem  |
+-------------------|-----------------------------|
|  00:1A:2B:3C:4D:5E  |  192.168.1.10  [SHM_KEY_1]  |
+-------------------|-----------------------------|
|  11:22:33:44:55:66  |  10.0.1.20     [SHM_KEY_2]  |
+-------------------|-----------------------------|
|        ...        |           ...               |
+-------------------|-----------------------------|

2. Client-Server Model with Shared Memory 🔄🔐

• RTM Process (Server): Manages both the routing table and ARP table.
• Client Processes: Receive updates through Unix domain sockets and retrieve relevant data from shared memory. Sends its own PID upon synchronization using UDS for future signal-based communications.

3. CRUD Operations with Signal Integration 🛠🚦

• C (Create): Add a new entry 🆕.
• U (Update): Modify an existing entry ✏️.
• D (Delete): Remove an entry 🗑.
• On certain operations, signals might be sent to the clients for real-time updates.

4. Admin Dashboard with Extended Controls 👩‍💼👨‍💼

• Allows admins to interact directly with the RTM process for routing table and ARP management.
• 🧑‍💻 Admins can insert MAC-IP pairs, and these entries are reflected in shared memory.
• Introduces controls to flush entire tables and propagate this event to all clients using signals.

5. Data Structures, Memory Management & Signal Mechanisms 💾🔑🚦

• Shared Memory Keys: MAC addresses function as the keys to access IP addresses in shared memory.
• Operation Codes: Create, Update, Delete actions for MAC addresses.
• ARP Table Entry: Features the MAC to IP mapping.
• Notification Message: Comprises the operation code along with MAC address data.
• Signal Handling: SIGUSR1 for major notifications like flushing tables.

6. Client Termination Protocol & Server Cleanup 🛑✨

• Upon intending to disconnect, the client will clear its routing table and ARP table.
• A special "goodbye" message notifies the server, prompting the removal of the client's PID from the server's records.

Getting Started 🚀

1. Clone this repo: git clone https://github.com/ANSANJAY/Routing-Table-Manager.git.
2. Navigate to the project directory: cd project-directory.
3. Build the project: make.
4. Execute the server program: ./server and ./client to and you will be prompted with options as follows

[anamika@Ana Routing-Table-Manager]$ ./server
Please select from the following options:
1.CREATE <Destination IP> <Mask (0-32)> <Gateway IP> <OIF>
2.UPDATE <Destination IP> <Mask (0-32)> <New Gateway IP> <New OIF>
3.DELETE <Destination IP> <Mask (0-32)>
4.CREATE <MAC>
5.DELETE <MAC>
6.SHOW
7.FLUSH

Sample output

server

client

License 📜

This project is licensed under the GNU License. Kindly refer to the LICENSE file for detailed information.

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Developed with 💖 by Anamika