var Muxer = require('port-mux');

// instantiate Muxer
Muxer()
  // match HTTP GET requests (using a prefix string match) and forward them to localhost:80
  .addRule('GET ', 80)

  // match TLS (HTTPS) requests (versions 3.{0,1,2,3}) using a regular expression
  .addRule(/^\x16\x03[\x00-\x03]/, '192.168.1.1:443') // regex match

  // you can forward to UNIX domain sockets (which should already exist when you call .addRule()):
  .addRule(..., '/tmp/my-unix-domain-socket')

  // you can also provide a function to perform the matching:
  .addRule(function(chunk) {
    // - chunk is a Buffer containing the first incoming data
    // - if the function returns true, the match is considered a success.
  }, ...)

  // pass a function as a third argument and it will get called (once the proxy
  // has connected to the service) using the proxy connection and original
  // (incoming) connection as arguments:
  .addRule(..., ..., function(proxy, conn) {
    var addr = proxy.address();
    console.log('Incoming connection from %s passed to %s:%s',
      conn.remoteAddress,
      addr.address,
      addr.port
    );
  })

  // start listening on port 3000
  .listen(3000);