* The first 8 bytes of this are placed in the signature field.
     *
     * @param data The data.
     * @param offset The starting offset at which the SMB header begins.
     * @param length The length of the SMB data starting at offset. 
     */
    void sign(byte[] data, int offset, int length,
                ServerMessageBlock request, ServerMessageBlock response) {

    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.CommonServerMessageBlockRequest#size()
     */
    @Override
    public int size () {
        return size8(Smb2Constants.SMB2_HEADER_LENGTH + 4);
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.smb2.ServerMessageBlock2#writeBytesWireFormat(byte[], int)
     */
    @Override

    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.CommonServerMessageBlockRequest#size()
     */
    @Override
    public int size () {
        return size8(Smb2Constants.SMB2_HEADER_LENGTH + 4);
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.smb2.ServerMessageBlock2#writeBytesWireFormat(byte[], int)
     */
    @Override

    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.CommonServerMessageBlockRequest#size()
     */
    @Override
    public int size () {
        return size8(Smb2Constants.SMB2_HEADER_LENGTH + 32);
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.smb2.ServerMessageBlock2#writeBytesWireFormat(byte[], int)
     */
    @Override

    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.CommonServerMessageBlockRequest#size()
     */
    @Override
    public int size () {
        int size = Smb2Constants.SMB2_HEADER_LENGTH + 36 + size8(2 * this.dialects.length, 4);
        if ( this.negotiateContexts != null ) {
            for ( NegotiateContextRequest ncr : this.negotiateContexts ) {
                size += 8 + size8(ncr.size());

        int avPairsLength = avPairs != null ? avPairs.length : 0;
        byte[] temp = new byte[28 + avPairsLength + 4];

        Encdec.enc_uint32le(0x00000101, temp, 0); // Header
        Encdec.enc_uint32le(0x00000000, temp, 4); // Reserved
        Encdec.enc_uint64le(nanos1601, temp, 8);
        System.arraycopy(clientChallenge, 0, temp, 16, 8);

        int n;
        if ( ( n = readn(in, buffer, bufferIndex, HEADER_LENGTH) ) != HEADER_LENGTH ) {
            if ( n == -1 ) {
                return -1;
            }
            throw new IOException("unexpected EOF reading netbios session header");
        }
        int t = buffer[ bufferIndex ] & 0xFF;
        return t;
    }

    int type, length;

                    }
                }
                // == 5*128 = 640

                // . and .. entries = 200 byte (includes alignment)

                // + 64 byte header
                // + 8 byte query response overhead
                // + 110 bytes entry
                // -> 1022 predicted message size <= 1023 maximum buffer size
                // 112 bytes to alignment

        return getHeaderFields0();
    }

    public int getHeaderFieldInt(String header, int def) {
        try {
            handshake();
        } catch (IOException ex) { }
        return connection.getHeaderFieldInt(header, def);
    }

    public long getHeaderFieldDate(String header, long def) {
        try {
            handshake();
        } catch (IOException ex) { }

            if ( have != 0 ) {
                NdrBuffer hdrBuf = new NdrBuffer(inB, 0);
                setupReceivedFragment(hdrBuf);
                hdrBuf.setIndex(0);
                msg.decode_header(hdrBuf);
            }

            NdrBuffer msgBuf;
            if ( have != 0 && !msg.isFlagSet(DCERPC_LAST_FRAG) ) {
                msgBuf = new NdrBuffer(receiveMoreFragments(msg, inB), 0);
            }