/**
     * @return whether this is a SMB2 connection
     * @throws SmbException
     */
    boolean isSMB2 () throws SmbException;


    /**
     * @return number of inflight requests
     */
    int getInflightRequests ();

            this.result = buf.dec_ndr_long();
        }
        else { /* Bind_ack or Response */
            decode_out(buf);
        }
    }


    /**
     * 
     * @return the operation number
     */
    public abstract int getOpnum ();


    /**
     * 
     * @param buf
     * @throws NdrException
     */
    public abstract void encode_in ( NdrBuffer buf ) throws NdrException;

    static final String NATIVE_LANMAN =
            Config.getProperty( "jcifs.smb1.smb.client.nativeLanMan", "jCIFS" );
    static final int VC_NUMBER = 1;
    static final SmbTransport NULL_TRANSPORT = new SmbTransport( null, 0, null, 0 );

        buf.enc_ndr_small(1); /* num context items */
        buf.enc_ndr_small(0); /* reserved */
        buf.enc_ndr_short(0); /* reserved2 */
        buf.enc_ndr_short(0); /* context id */
        buf.enc_ndr_small(1); /* number of items */
        buf.enc_ndr_small(0); /* reserved */
        this.binding.getUuid().encode(buf);
        buf.enc_ndr_short(this.binding.getMajor());
        buf.enc_ndr_short(this.binding.getMinor());

    /**
     * Continues an MD4 message digest using the input byte.
     */
    public void engineUpdate (byte b) {
        // compute number of bytes still unhashed; ie. present in buffer
        int i = (int)(count % BLOCK_LENGTH);
        count++;                                        // update number of bytes
        buffer[i] = b;
        if (i == BLOCK_LENGTH - 1)
            transform(buffer, 0);
    }

    /**

                throw new IOException("corrupted stream - high tag number < 31 found");
            }

            tagNo = b & 0x7f;

            // X.690-0207 8.1.2.4.2
            // "c) bits 7 to 1 of the first subsequent octet shall not all be zero."
            if (0 == tagNo)
            {
                throw new IOException("corrupted stream - invalid high tag number found");
            }

/**
 * @author mbechler
 *
 */
public interface SMBSigningDigest {

    /**
     * Performs MAC signing of the SMB. This is done as follows.
     * The signature field of the SMB is overwritten with the sequence number;
     * The MD5 digest of the MAC signing key + the entire SMB is taken;
     * The first 8 bytes of this are placed in the signature field.
     *
     * @param data
     *            The data.
     * @param offset

     */
    String getDomain ();


    /**
     * @return the share this referral points to
     */
    String getShare ();


    /**
     * @return the number of characters from the unc path that were consumed by this referral
     */
    int getPathConsumed ();


    /**
     * @return the replacement path for this referal
     */
    String getPath ();

    /**
     * Set received status
     */
    void received ();


    /**
     * Unset received status
     */
    void clearReceived ();


    /**
     * 
     * @return number of credits granted by the server
     */
    int getGrantedCredits ();


    /**
     * @return status code
     */
    int getErrorCode ();


    /**
     * @param k
     */

     * return 0 for streams connected to regular files. However, a
     * stream created from a Named Pipe this method will query the server using a
     * "peek named pipe" operation and return the number of available bytes
     * on the server.
     */
    @Override
    public int available () throws IOException {
        try ( SmbFileHandleImpl fd = this.handle.ensureOpen();