SMBUtil.writeInt4(8, buffer, bufferIndex + 4);

        response = spy(response);
        when(response.getHeaderStart()).thenReturn(headerStart);

        // Write FileInternalInfo data at calculated offset (headerStart + bufferOffset)
        SMBUtil.writeInt8(0xFEDCBA9876543210L, buffer, headerStart + 300);

        int result = response.readBytesWireFormat(buffer, bufferIndex);

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.smb1.smb1;

abstract class SmbComNtTransaction extends SmbComTransaction {

    // relative to headerStart
    private static final int NTT_PRIMARY_SETUP_OFFSET = 69;
    private static final int NTT_SECONDARY_PARAMETER_OFFSET = 51;

    static final int NT_TRANSACT_QUERY_SECURITY_DESC = 6;

    int function;

    private void setHeaderStart(Smb2ChangeNotifyResponse response, int headerStart) throws Exception {
        Method method = ServerMessageBlock2.class.getDeclaredMethod("getHeaderStart");
        method.setAccessible(true);

        Field field = ServerMessageBlock2.class.getDeclaredField("headerStart");
        field.setAccessible(true);
        field.setInt(response, headerStart);
    }

    /**

            System.arraycopy(buffer, bufferIndex, this.txn_buf, this.bufParameterStart + this.parameterDisplacement, this.parameterCount);
            bufferIndex += this.parameterCount;
        }
        if (this.dataCount > 0) {
            bufferIndex += this.pad1 = this.dataOffset - (bufferIndex - this.headerStart);

        d.parameterDisplacement = 0;
        d.dataCount = 4; // Current data count matches total
        d.dataOffset = 10; // Absolute offset in the SMB message
        d.dataDisplacement = 0;
        d.headerStart = 0; // Set headerStart (bufferIndex will be 0)

        // Prepare buffer with test data
        byte[] buf = new byte[100];
        for (int i = 0; i < buf.length; i++) {
            buf[i] = (byte) ('A' + (i % 26));

 * such as security descriptor queries and file change notifications.
 */
public abstract class SmbComNtTransaction extends SmbComTransaction {

    // relative to headerStart
    private static final int NTT_PRIMARY_SETUP_OFFSET = 71;
    private static final int NTT_SECONDARY_PARAMETER_OFFSET = 51;

    /**
     * NT transaction function code for querying security descriptors.

        // For Unicode: 1 byte (initial null in writeBytesWireFormat)
        // + potential 1 byte alignment (in writeString) + fileName.length() * 2 + 2 bytes (terminating nulls)
        // Since headerStart is 0 and dstIndex starts at 1 (after initial null), (1-0)%2=1, so alignment byte added
        // Total: 1 + 1 + 12*2 + 2 = 28 bytes
        byte[] dst = new byte[30]; // Use extra buffer space to avoid index errors

        return this.errorContextCount;
    }

    /**
     * Gets the header start position for this message.
     *
     * @return the headerStart
     */
    public final int getHeaderStart() {
        return this.headerStart;
    }

    /**
     * Gets the total length of this message.
     *
     * @return the length
     */
    public final int getLength() {

        smb.useUnicode = true;
        smb.headerStart = 1; // Make the start odd
        String testString = "Aligned Unicode";
        byte[] buffer = new byte[testString.length() * 2 + 2 + 1]; // +1 for alignment
        int len = smb.writeString(testString, buffer, 1);
        // When dstIndex=1 and headerStart=1, (1-1)%2=0, no alignment padding needed

    private static final int DEFAULT_MAX_DATA_COUNT =
            Config.getInt("jcifs.smb1.smb.client.transaction_buf_size", SmbComTransaction.TRANSACTION_BUF_SIZE) - 512;

    // relative to headerStart
    private static final int PRIMARY_SETUP_OFFSET = 61;
    private static final int SECONDARY_PARAMETER_OFFSET = 51;

    private static final int DISCONNECT_TID = 0x01;