int bodyStart = headerStart + Smb2Constants.SMB2_HEADER_LENGTH;
        // Error response structure: size(2)=9, errorContextCount(1), reserved(1), bc(4), errorData(bc)
        SMBUtil.writeInt2(9, buf, bodyStart);
        buf[bodyStart + 2] = 0x02; // errorContextCount
        buf[bodyStart + 3] = 0x00; // reserved
        int bc = 4;
        SMBUtil.writeInt4(bc, buf, bodyStart + 4);
        byte[] err = new byte[] { 0x55, 0x66, 0x77, 0x01 };

        }

        @Test
        @DisplayName("Should not modify reserved field bytes")
        void testReservedFieldNotModified() {
            lock = new Smb2Lock(999L, 888L, 0xFF);

            // Fill buffer with non-zero values
            Arrays.fill(buffer, (byte) 0xFF);

            lock.encode(buffer, 0);

            // Reserved field bytes are not modified by the encode method

        assertEquals(expected, actual, "size() must be 8-byte aligned");
    }

    @ParameterizedTest
    @ValueSource(ints = { 0, 1, 5 })
    @DisplayName("writeBytesWireFormat writes StructureSize=4 and Reserved=0 at given offset")
    void writeBytesWireFormat_writesExpectedValuesAtOffset(int offset) {
        // Arrange
        Smb2LogoffRequest req = newRequest();
        byte[] buf = new byte[offset + 8]; // extra space for safety

#
# The copyright for all class sources.
# This property is NOT map style.
# You should specify before your first generating.
#
#/*
# * Copyright(c) DBFlute TestCo.,TestLtd. All Rights Reserved.
# */

        int start = dstIndex;

        // StructureSize (2 bytes) - must be 36
        SMBUtil.writeInt2(STRUCTURE_SIZE, dst, dstIndex);
        dstIndex += 2;

        // Reserved (2 bytes)
        SMBUtil.writeInt2(0, dst, dstIndex);
        dstIndex += 2;

        // Flags (4 bytes)
        SMBUtil.writeInt4(flags, dst, dstIndex);
        dstIndex += 4;

        bb.putInt(0);

        // InterfaceIndex (4 bytes)
        bb.putInt(interfaceIndex);

        // Capability (4 bytes)
        bb.putInt(capability);

        // Reserved (4 bytes) - must be 0
        bb.putInt(0);

        // LinkSpeed (8 bytes) - in bits per second
        bb.putLong((long) linkSpeed * 1000000L);

        // SockAddr_Storage (128 bytes)

    /**
     * Pending cancel flag - indicates cancel was pending at sender
     */
    int DCERPC_PENDING_CANCEL = 0x04; /* Cancel was pending at sender */
    /**
     * Reserved flag for future use
     */
    int DCERPC_RESERVED_1 = 0x08;
    /**
     * Supports concurrent multiplexing flag
     */
    int DCERPC_CONC_MPX = 0x10; /* supports concurrent multiplexing */
    /**

        // Write valid structure (16 bytes)
        SMBUtil.writeInt2(16, buffer, offset); // Structure size
        buffer[offset + 2] = (byte) 0x01; // Share type (DISK)
        buffer[offset + 3] = 0; // Reserved
        SMBUtil.writeInt4(0x8001, buffer, offset + 4); // Share flags (DFS | ENCRYPT_DATA)
        SMBUtil.writeInt4(0x28, buffer, offset + 8); // Capabilities (DFS | SCALEOUT)

		t.Run("", func(t *testing.T) {
			contains := containsReservedMetadata(test.header)
			if contains && !test.shouldFail {
				t.Errorf("contains reserved header but should not fail")
			} else if !contains && test.shouldFail {
				t.Errorf("does not contain reserved header but failed")
			}
		})
	}
}

var sseTLSHandlerTests = []struct {
	URL               *url.URL
	Header            http.Header

        // Verify structure:
        // Offset 0-1: FID (2 bytes)
        // Offset 2-3: Reserved (2 bytes, should be 0x00)
        // Offset 4-7: Security Information (4 bytes)
        assertEquals(8, bytesWritten);

        // Check FID
        assertEquals(0xABCD, SMBUtil.readInt2(dst, 10));

        // Check reserved bytes are zero
        assertEquals(0x00, dst[12]);
        assertEquals(0x00, dst[13]);