* @param maxSize maximum allowed size
     * @throws SmbException if validation fails
     */
    public void validateBuffer(byte[] buffer, int expectedSize, int maxSize) throws SmbException {
        totalValidations.incrementAndGet();

        if (buffer == null) {
            failedValidations.incrementAndGet();
            throw new SmbException("Response buffer is null");
        }

     * @throws SmbException if an SMB error occurs
     */
    public SmbRandomAccessFile(final SmbFile file, final String mode) throws SmbException {
        this(file, mode, SmbConstants.DEFAULT_SHARING, false);
    }

    /**
     * Instantiate a random access file from a {@link SmbFile}
     *
     * @param file
     * @param mode
     * @throws SmbException
     */

    }

    @Test
    public void testDirectoryTraversal() throws Exception {
        assertThrows(SmbException.class, () -> {
            validator.validatePath("\\share\\..\\..\\windows\\system32");
        });
    }

    @Test
    public void testDirectoryTraversalDot() throws Exception {
        assertThrows(SmbException.class, () -> {
            validator.validatePath("\\share\\.\\..\\folder");
        });
    }

     * @throws SmbException if an I/O error occurs
     */
    public void close() throws SmbException {
        file.close();
    }

    @Override
    public final boolean readBoolean() throws SmbException {
        if (read(tmp, 0, 1) < 0) {
            throw new SmbException("EOF");
        }
        return tmp[0] != (byte) 0x00;
    }

    @Override
    public final byte readByte() throws SmbException {

            return transport.getRemoteHostName();
        }
    }

    /**
     * {@inheritDoc}
     *
     * @throws SmbException
     *
     * @see jcifs.SmbTreeHandle#getServerTimeZoneOffset()
     */
    @Override
    public long getServerTimeZoneOffset() throws SmbException {
        try (SmbSessionImpl session = this.treeConnection.getSession(); SmbTransportImpl transport = session.getTransport()) {

        } catch (SmbException e) {
            // Ignore
        }

        try {
            validator.validateBuffer(null, 50, 200); // Will fail
        } catch (SmbException e) {
            // Expected
        }

        try {
            validator.safeAdd(Integer.MAX_VALUE, 1); // Will fail
        } catch (SmbException e) {
            // Expected
        }

     *
     * @return the NTLM challenge from the domain controller
     * @throws SmbException if an SMB error occurs
     * @throws UnknownHostException if the domain controller cannot be resolved
     */
    public static NtlmChallenge getChallengeForDomain() throws SmbException, UnknownHostException {
        if (DOMAIN == null) {
            throw new SmbException("A domain was not specified");
        }
        synchronized (DOMAIN) {

    void hasCapability_throws() throws SmbException {
        doThrow(new SmbException("capability check failed")).when(transport).hasCapability(eq(42));
        SmbException ex = assertThrows(SmbException.class, () -> transport.hasCapability(42));
        assertTrue(ex.getMessage().contains("failed"));
        verify(transport).hasCapability(42);
    }

    // Edge: disconnected status toggles

     *
     * @throws SmbException if the SID string is invalid
     */
    @Test
    void testToDisplayStringUnresolved() throws SmbException {
        SID sid = new SID(adminSidString);
        assertEquals(adminSidString, sid.toDisplayString());
    }

    /**
     * Test getting the domain SID.
     *
     * @throws SmbException if the SID string is invalid
     */
    @Test

     * @param transport
     * @return
     * @throws SmbException
     */
    private int waitForState(final SmbTransportImpl transport) throws SmbException {
        int cs;
        while ((cs = this.connectionState.get()) != 0) {
            if (cs == 2) {
                return cs;
            }
            if (cs == 3) {
                throw new SmbException("Disconnecting during tree connect");
            }