EchoNet

EchoNet is a minimal networking project written in C that demonstrates how a basic TCP Echo Server and Client work at the socket programming level.

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What is an Echo Server?

An Echo Server is one of the simplest forms of a network service:

• A server listens for incoming connections on a specific IP address + port.
• A client connects to the server, sends a message, and receives the same message back.
• This "echo" loop makes it a perfect first step to understand how protocols like TCP work under the hood.

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How it works (Concept)

1. Server (tcp_echo_server)

   • Creates a TCP socket.
   • Binds it to a port (e.g., 8080).
   • Listens for incoming client connections.
   • Accepts a client → reads data → sends the same data back.
   • Keeps running until manually stopped.

2. Client (tcp_echo_client)

   • Creates a TCP socket.
   • Connects to the server’s IP + port.
   • Sends user input text.
   • Waits for the server to echo the text back.
   • Prints the echoed response.

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Setup & Run

1. Clone the repository

git clone git@github.com:piyushdev04/EchoNet.git
cd EchoNet

2. Compile the project (or use the Makefile)

make

3. Run the server

./echonet_server 8080

4. Run the client (in another terminal or pane)

./echonet_client 127.0.0.1 8080

5. Send messages

• Type a message in the client terminal.
• See it echoed back from the server.

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Notes

• Make sure your firewall allows the chosen port (default: 8080).
• Both server and client must be running on the same network if not using localhost.

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Thanks for reading!🍁