import jcifs.internal.smb2.info.Smb2SetInfoRequest;
import jcifs.internal.smb2.ioctl.Smb2IoctlRequest;
import jcifs.internal.smb2.ioctl.Smb2IoctlResponse;
import jcifs.internal.smb2.ioctl.SrvCopyChunkCopyResponse;
import jcifs.internal.smb2.ioctl.SrvCopychunk;
import jcifs.internal.smb2.ioctl.SrvCopychunkCopy;
import jcifs.internal.smb2.ioctl.SrvRequestResumeKeyResponse;

/**

            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00 };

    /**
     * SMB2 protocol header template with magic number 0xFE 'SMB'
     */
    public static final byte[] SMB2_HEADER = { (byte) 0xFE, (byte) 'S', (byte) 'M', (byte) 'B', // ProtocolId
            (byte) 64, (byte) 0x00, // StructureSize (LE)

        SmbSession result = transport.getSmbSession(ctx, host, domain);
        assertSame(session, result);
        verify(transport).getSmbSession(eq(ctx), eq(host), eq(domain));
    }

    // SMB2 detection: true/false and exception path
    @Test
    @DisplayName("isSMB2 returns true/false and can throw")
    void isSMB2_variants() throws Exception {
        when(transport.isSMB2()).thenReturn(true, false);

        @CsvSource({ "'smb://user:password@server/share', 'smb://user:******@server/share'",
                "'smb://domain\\user:secret@host/path', 'smb://domain\\user:******@host/path'",
                "'smb2://admin:admin123@192.168.1.1/folder', 'smb2://admin:******@192.168.1.1/folder'",
                "'smbs://test:p@******@****.***/share', 'smbs://test:******@example.com/share'" })

import jcifs.CIFSException;
import jcifs.SmbConstants;
import jcifs.SmbFileHandle;
import jcifs.internal.smb1.com.SmbComReadAndX;
import jcifs.internal.smb1.com.SmbComReadAndXResponse;
import jcifs.internal.smb2.io.Smb2ReadRequest;
import jcifs.internal.smb2.io.Smb2ReadResponse;
import jcifs.util.transport.TransportException;

/**
 * This InputStream can read bytes from a file on an SMB file server. Offsets are 64 bits.
 */

 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.smb2.lease;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.Executors;

        assertThrows(IllegalArgumentException.class, () -> InputValidator.validateBufferSize(1001, 1000, "test"));
    }

    @Test
    @DisplayName("Test SMB2 buffer size validation")
    void testSmb2BufferSize() {
        assertDoesNotThrow(() -> InputValidator.validateSmb2BufferSize(1000000L, "test"));

        assertNotNull(SMBUtil.SMB2_HEADER);
        // The actual header is 68 bytes (4 + 2 + 2 + 2 + 2 + 4 + 2 + 2 + 4 + 4 + 8 + 4 + 4 + 8 + 8 + 8 = 68)
        assertEquals(68, SMBUtil.SMB2_HEADER.length);

        // Verify SMB2 header signature
        assertEquals((byte) 0xFE, SMBUtil.SMB2_HEADER[0]);
        assertEquals((byte) 'S', SMBUtil.SMB2_HEADER[1]);
        assertEquals((byte) 'M', SMBUtil.SMB2_HEADER[2]);

package jcifs.internal.smb2;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;

## 2. Protocol Specification Reference

- **MS-SWN**: Service Witness Protocol Specification
- **MS-SMB2 Section 3.2.4.24**: FSCTL_SRV_REQUEST_RESUME_KEY
- **MS-SMB2 Section 3.3.5.15.12**: Cluster Reconnect
- **MS-RRP**: Windows Remote Registry Protocol (for witness service discovery)

## 3. Witness Architecture

### 3.1 Witness Service Types
```java