Basic networking

tcp_ip.js

const net = require('net');
const network = require('network');
const uuid = require('uuid');
const SHA256 = require('js-sha256');

const port = parseInt(process.env.PORT);

function handleConnection(conn) {
  console.log('> New client connection: ', conn.remoteAddress, conn.remotePort);
  conn.setEncoding('utf8');
  conn.on('data', data => {
    console.log('> Received data: ', data);
  })
}

function connectWithPeer() {
  // get my IP address
  network.get_public_ip((err, ip) => {
    if (err)
      throw err;
    console.log('> Connected : ', ip, port);
    // create server
    const server = net.createServer();
    server.on('connection', handleConnection);
    server.listen(port, '0.0.0.0', () => {
      console.log('> Listening on : ', server.address());
    });
    // if PORT == 8081 connect with peer
    if (port === 8335) {
      console.log('> Connecting to server...');
      // write message
      const client = new net.Socket();

      client.connect(8334, '0.0.0.0', () => {
        console.log('> Connected to peer.');
        client.write(`VERSION 1 ${SHA256(uuid())}`);
      });

      client.on('data', data => {
        console.log('> Received data: ', data);
      });
    }
  })
}


connectWithPeer();