public static final int DCERPC_FIRST_FRAG = 0x01; /* First fragment */
    public static final int DCERPC_LAST_FRAG = 0x02; /* Last fragment */
    public static final int DCERPC_PENDING_CANCEL = 0x04; /* Cancel was pending at sender */
    public static final int DCERPC_RESERVED_1 = 0x08;
    public static final int DCERPC_CONC_MPX = 0x10; /* supports concurrent multiplexing */

     */
    int getCreditCost ();


    /**
     * @param credits
     */
    void setRequestCredits ( int credits );


    /**
     * @return whether this is a cancel request
     */
    boolean isCancel ();


    /**
     * @return chained request
     */
    Request getNext ();


    /**
     * @return the response for this request
     */

     * opened if it is not and should be closed with {@link #close()} when no longer
     * needed.
     * 
     * Closing the context should cancel a pending notify request, but that does not seem to work reliable in all
     * implementations.
     * 
     * Changes in between these calls (as long as the file is open) are buffered by the server, so iteratively calling

    public static final int DCERPC_FIRST_FRAG      = 0x01; /* First fragment */
    public static final int DCERPC_LAST_FRAG       = 0x02; /* Last fragment */
    public static final int DCERPC_PENDING_CANCEL  = 0x04; /* Cancel was pending at sender */
    public static final int DCERPC_RESERVED_1      = 0x08;
    public static final int DCERPC_CONC_MPX        = 0x10; /* supports concurrent multiplexing */

    @Override
    @After
    public void tearDown () throws Exception {
        if ( this.executor != null ) {
            this.executor.shutdown();
            if ( this.future != null ) {
                this.future.cancel(true);
            }
            this.executor.awaitTermination(1, TimeUnit.SECONDS);
        }
        if ( this.base != null ) {
            this.base.delete();
        }
        super.tearDown();
    }

    /**
     * @param config
     * @param mid
     * @param asyncId
     */
    public Smb2CancelRequest ( Configuration config, long mid, long asyncId ) {
        super(config, SMB2_CANCEL);
        setMid(mid);
        setAsyncId(asyncId);
        if ( asyncId != 0 ) {
            addFlags(SMB2_FLAGS_ASYNC_COMMAND);
        }
    }


    /**
     * {@inheritDoc}
     *

     * @return the following message
     */
    CommonServerMessageBlockRequest split ();


    /**
     * @return the size of this message
     */
    int size ();


    /**
     * @return create cancel request
     */
    CommonServerMessageBlockRequest createCancel ();


    /**
     * @param next
     * @return whether to allow chaining
     */

 *
 */
public class SmbComNtCancel extends ServerMessageBlock {

    /**
     * @param config
     */
    protected SmbComNtCancel ( Configuration config, int mid ) {
        super(config, SMB_COM_NT_CANCEL);
        setMid(mid);
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.smb1.ServerMessageBlock#isCancel()
     */
    @Override
    public boolean isCancel () {

        if (ptype == 2 || ptype == 3) { /* Response or Fault */
            alloc_hint = buf.dec_ndr_long();
            buf.dec_ndr_short();        /* context id */
            buf.dec_ndr_short();        /* cancel count */
        }
        if (ptype == 3 || ptype == 13) {               /* Fault */
            result = buf.dec_ndr_long();
        } else {                        /* Bind_ack or Response */

        if ( this.ptype == 2 || this.ptype == 3 ) { /* Response or Fault */
            this.alloc_hint = buf.dec_ndr_long();
            buf.dec_ndr_short(); /* context id */
            buf.dec_ndr_short(); /* cancel count */
        }
        if ( this.ptype == 3 || this.ptype == 13 ) { /* Fault */
            this.result = buf.dec_ndr_long();
        }
        else { /* Bind_ack or Response */
            decode_out(buf);