/**
* Registers the client and calculates the delay after unsuccessful logins.
*
* @param client client address
* @return delay
*/
public int block(final byte[] client) {
synchronized (blocked) {
int delay = blocked.value(client);
delay = delay == -1 ? 1 : Math.min(delay, 1024) * 2;
blocked.add(client, delay);
return delay;
}
}
/**
* Resets the login delay after successful login.
*
* @param client client address
*/
public void unblock(final byte[] client) {
synchronized (blocked) {
blocked.delete(client);
}
}