udp-ws

UDP <> WebSocket bridge with PSK auth.

How

Server process:

UDP_SEND_HOST=127.0.0.1 \
UDP_SEND_PORT=1457 \
UDP_RECV_HOST=255.255.255.255 \
UDP_RECV_PORT=1457 \
WS_HOST=127.0.0.1 \
WS_PORT=8080 \
PRE_SHARED_KEY=secret \
  node udp-ws/index.js

TLS proxy of your choosing (TLS is required for safe PSK auth over the public internet):

server.com:443 <> server.com:8080

Client javascript:

const s = new WebSocket('wss://server.com')
s.authenticated = false
s.addEventListener('message', evt => {
  if (s.authenticated) {
    console.log('got message', evt.data)
  } else if (evt.data === 'ok') {
    s.authenticated = true
    console.log('auth success')
  } else {
    console.log('auth failure')
  }
})
s.send('secret')

License

MIT