char *requests[] = {
  "error",
  "ping",
  "registration",
  "deregistration",
  "key",
  "open",
  "close"
  };

char **replies = requests;

char *errors[] = {
  "Error 0",
  "Badly formatted packet",
  "Unsupported protocol version",
  "Unknown request",
  "Key generator out of range",
  "Permission denied",
  "Key not registered",
  "Unknown key type",
  "No keys available"
  };