private CredentialsInternal credentials;
    private byte[] sessionKey;
    private boolean extendedSecurity;

    private final AtomicLong usageCount = new AtomicLong(1);
    private final AtomicBoolean transportAcquired = new AtomicBoolean(true);

    private long sessionId;

    private SMBSigningDigest digest;

    private final String targetDomain;
    private final String targetHost;