if (this.structureSize != 44) {
            throw new SMBProtocolDecodingException("Invalid lease break structure size: " + this.structureSize);
        }
        bufferIndex += 2;

        // Reserved (2 bytes)
        bufferIndex += 2;

        // Flags (4 bytes)
        this.flags = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

        // LeaseKey (16 bytes)

            this.bufDataStart = this.totalParameterCount;
        }
        bufferIndex += 2;
        this.totalDataCount = SMBUtil.readInt2(buffer, bufferIndex);
        bufferIndex += 4; // Reserved
        this.parameterCount = SMBUtil.readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        this.parameterOffset = SMBUtil.readInt2(buffer, bufferIndex);
        bufferIndex += 2;

        assertEquals(24, SMBUtil.readInt2(buffer, offset));

        // Verify close flags (2 bytes at offset+2, should be 0 by default)
        assertEquals(0, SMBUtil.readInt2(buffer, offset + 2));

        // Verify Reserved (4 bytes at offset+4, should be 0)
        assertEquals(0, SMBUtil.readInt4(buffer, offset + 4));

        // Verify file ID is copied correctly (16 bytes starting at offset+8)
        byte[] copiedFileId = new byte[16];

        final int start = dstIndex;
        SMBUtil.writeInt2(this.fileAttributes, dst, dstIndex);
        dstIndex += 2;
        SMBUtil.writeUTime(this.lastWriteTime, dst, dstIndex);
        dstIndex += 4;
        // reserved
        dstIndex += 10;
        return dstIndex - start;
    }

    @Override
    protected int writeBytesWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;

            throw new SMBProtocolDecodingException("Expected structureSize = 60");
        }
        this.closeFlags = SMBUtil.readInt2(buffer, bufferIndex + 2);
        bufferIndex += 4;
        bufferIndex += 4; // Reserved
        this.creationTime = SMBUtil.readTime(buffer, bufferIndex);
        bufferIndex += 8;
        this.lastAccessTime = SMBUtil.readTime(buffer, bufferIndex);
        bufferIndex += 8;

        if (this.structureSize != 36) {
            throw new SMBProtocolDecodingException("Invalid lease break response structure size: " + this.structureSize);
        }
        bufferIndex += 2;

        // Reserved (2 bytes)
        bufferIndex += 2;

        // Flags (4 bytes)
        this.flags = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

        // LeaseKey (16 bytes)

        }

        /** The return value of the operation */
        public int retval;
        /** The NetBIOS name of the server to connect to */
        public String system_name;
        /** Reserved parameter, must be set to 2 */
        public int unknown;
        /** The desired access rights to the SAM server */
        public int access_mask;
        /** The returned handle to the SAM server */

        }

        /** The return value of the operation */
        public int retval;
        /** The NetBIOS name of the server to connect to */
        public String system_name;
        /** Reserved parameter, must be set to 2 */
        public int unknown;
        /** The desired access rights to the SAM server */
        public int access_mask;
        /** The returned handle to the SAM server */

        // Next command
        SMBUtil.writeInt4(0, buffer, bufferIndex + 20);
        // Message ID
        SMBUtil.writeInt8(1, buffer, bufferIndex + 24);
        // Reserved/Async ID
        SMBUtil.writeInt8(0, buffer, bufferIndex + 32);
        // Session ID
        SMBUtil.writeInt8(0, buffer, bufferIndex + 40);
        // Signature

        int n = block.writeAndXWireFormat(buf, 0);

        assertTrue(n > 0);
        // Common AndX header: command at +1, reserved at +2, offset at +3/+4
        assertEquals((byte) 0xFF, buf[1], "AndX command should be 0xFF when no chaining");
        assertEquals((byte) 0x00, buf[2], "Reserved byte must be 0");
        assertEquals((byte) 0xDE, buf[3], "Sentinel low offset when no chaining");