netcat.go

func startServer() {
  // compose server address from host and port
  addr := fmt.Sprintf("%s:%d", *host, *port)
  // launch TCP server
  listener, err := net.Listen("tcp", addr)

  if err != nil {
    // if we can't launch server for some reason,
    // we can't do anything about it, just panic!
    panic(err)
  }

  log.Printf("Listening for connections on %s", listener.Addr().String())

  for {
    conn, err := listener.Accept()
    if err != nil {
      log.Printf("Error accepting connection from client: %s", err)
    } else {
      go processClient(conn)
    }
  }
}