* @param file
     * @param mode
     * @throws SmbException
     */
    public SmbRandomAccessFile ( SmbFile file, 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
     */

        if((read( tmp, 0, 4 )) < 0 ) {
            throw new SmbException( "EOF" );
        }
        return Encdec.dec_uint32be( tmp, 0 );
    }
    public final long readLong() throws SmbException {
        if((read( tmp, 0, 8 )) < 0 ) {
            throw new SmbException( "EOF" );
        }
        return Encdec.dec_uint64be( tmp, 0 );
    }
    public final float readFloat() throws SmbException {

     * @param transport
     * @return
     * @throws SmbException
     */
    private int waitForState ( 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");
            }

        }
        return new NtlmChallenge( trans.server.encryptionKey, dc );
    }
    public static NtlmChallenge getChallengeForDomain()
                throws SmbException, UnknownHostException {
        if( DOMAIN == null ) {
            throw new SmbException( "A domain was not specified" );
        }
synchronized (DOMAIN) {
            long now = System.currentTimeMillis();
            int retry = 1;

            do {

     * @return tree handle
     * @throws SmbException
     */
    public SmbTreeHandleImpl connectWrapException ( SmbResourceLocatorImpl loc ) throws SmbException {
        try {
            return connect(loc);
        }
        catch ( UnknownHostException uhe ) {
            throw new SmbException("Failed to connect to server", uhe);
        }
        catch ( SmbException se ) {
            throw se;
        }

            return trans.getServerEncryptionKey();
        }
        catch ( SmbException e ) {
            throw e;
        }
        catch ( IOException e ) {
            throw new SmbException("Connection failed", e);
        }
    }


    @Override
    public void logon ( CIFSContext tf, Address dc ) throws SmbException {
        logon(tf, dc, 0);
    }


    @Override
    @Deprecated

                throw new SmbException("Failed to query Kerberos session key from ExtendedGSSContext", ex);
            }
        }
        throw new SmbException("ExtendedGSSContext is not implemented by GSSContext");
    }


    @Override
    public byte[] initSecContext ( byte[] token, int off, int len ) throws SmbException {
        try {

        FileEntry[] entries;

        if ( u.getPath().lastIndexOf('/') != ( u.getPath().length() - 1 ) )
            throw new SmbException(u.toString() + " directory must end with '/'");

        if ( locator.getType() != SmbConstants.TYPE_SERVER )
            throw new SmbException("The requested list operations is invalid: " + u.toString());

        Set<FileEntry> set = new HashSet<>();

            default:
                throw new SmbException( resp.errorCode, null );
        }
        if (resp.verifyFailed) {
            throw new SmbException( "Signature verification failed." );
        }
    }
    void send( ServerMessageBlock request, ServerMessageBlock response ) throws SmbException {

        connect(); /* must negotiate before we can test flags2, useUnicode, etc */

        switch ( this.state ) {
        case 1:
            return makeNegotiate(token);
        case 2:
            return makeAuthenticate(token);
        default:
            throw new SmbException("Invalid state");
        }
    }


    protected byte[] makeAuthenticate ( byte[] token ) throws SmbException {
        try {