tcp-relayer

Node.js module to relay raw TCP data from one socket to another. Essentially, it should work like the following:

• A server is started on some port
• It waits for two TCP clients to connect
• As soon as it receives two connections, it starts relaying data from the first socket to second one
• Data is relayed until one of the clients disconnects

Pre-requisites

• NodeJS version >= 6.9.1
• NPM version >= 3.10.8
• Telnet or any other tool that allows you to connect to remote computer over a TCP/IP network

Installation

$ npm install https://github.com/sarsjits/tcp-relayer.git

Usage

var relay = require('tcp-relayer');

relay.relayServer(portNumber);

Example

• Use the above module in your Node app as mentioned in the usage. This will create a server listening over the mentioned port.

• Run the app

• 

• Now to connect to the running server, we will use telnet.

• Client 1

• 

• Server

• 

• Sending message to the server even no other TCP client is yet connected.

• Client 1

• 

• Server

• 

• As soon as another client connects to the server, buffered messages are sent to the client. The two clients can now communicate via server.

• Client 2

• 

• Server

• 

• If the connection between two TCP clients is already established. The server will drop the new incoming connection.

• Client 3

• 

• Server

• 

Future Work

• Extending to multiple pair of connections
• Standalone app supporting Graphical Interface.

Suggestions

Provide the feedback at [email protected]