Implementing a Custom Protocol Using Raw Sockets

Introduction

This is a custom protocol that works like DNS (but much simpler than DNS) to find out the IP address corresponding to a domain name. The protocol is implemented using raw sockets in C language.

Compilation and Execution

Execute the following in the root directory of the project in the terminal:

1. For color output, run the following command:

   make all

2. To run the server, run the following command:

   sudo ./server

3. To run the client, run the following command:

   sudo ./client <dest_mac>

4. To clean the executables, run the following command:

   make clean

5. In case of issues due to color encodings, run the following command:

   make nocolor

How to Use

To run commands in the client, run queries in the following format:

getIP <N> <domain-1> <domain-2> ... <domain-N>

where:

• <N> is the number of domain names to query
• <domain-1>, <domain-2>, ..., <domain-N> are the domain names to query