validator.safeAdd(Integer.MIN_VALUE, -1);
        });
    }

    @Test
    public void testSafeMultiply() throws Exception {
        assertEquals(20, validator.safeMultiply(4, 5));
        assertEquals(-20, validator.safeMultiply(-4, 5));
        assertEquals(0, validator.safeMultiply(0, 1000));
    }

    @Test
    public void testSafeMultiplyOverflow() throws Exception {

        TransCallNamedPipeResponse response3 = new TransCallNamedPipeResponse(mockConfig, outputBuffer3);
        System.arraycopy(sourceData, 0, buffer, 45, sourceData.length);
        int result3 = response3.readDataWireFormat(buffer, 45, sourceData.length);
        assertEquals(sourceData.length, result3);
    }

    @Test
    void testConstructorWithNullBuffer() {

- Update `SmbFile` caching logic to use leases
- Add lease break handling in `SmbTransport`

---

### Phase 2: Persistent Handles
**Priority: HIGH** | **Estimated Effort: 4-5 weeks**

Persistent handles allow connections to survive network interruptions and server failovers.

#### 2.1 Core Persistent Handle Infrastructure
```
Package: jcifs.internal.smb2.persistent

            (byte) 26, (byte) 18, (byte) 10, (byte) 2, (byte) 59, (byte) 51, (byte) 43, (byte) 35, (byte) 62, (byte) 54, (byte) 46,
            (byte) 38, (byte) 30, (byte) 22, (byte) 14, (byte) 6, (byte) 61, (byte) 53, (byte) 45, (byte) 37, (byte) 29, (byte) 21,
            (byte) 13, (byte) 5, (byte) 60, (byte) 52, (byte) 44, (byte) 36, (byte) 28, (byte) 20, (byte) 12, (byte) 4, (byte) 27,
            (byte) 19, (byte) 11, (byte) 3 };

        int n = next.writeParametersWireFormat(buf, 0);
        assertEquals(buf.length, n, "Parameter bytes written should match expected length");
        // informationLevel LE at offset 4..5
        assertEquals((byte) 0x04, buf[4]);
        assertEquals((byte) 0x01, buf[5]);
    }

    /**
     * Ensures writeSetupWireFormat writes subcommand and trailing zero, returning 2.
     */
    @Test

        buffer[41] = 0x00;
        buffer[42] = 0x00;

        // Parameter displacement (2 bytes)
        buffer[43] = 0x00;
        buffer[44] = 0x00;

        // Data count (2 bytes)
        buffer[45] = 0x00;
        buffer[46] = 0x00;

        // Data offset (2 bytes)
        buffer[47] = 0x00;
        buffer[48] = 0x00;

        // Data displacement (2 bytes)
        buffer[49] = 0x00;

- **Language**: Java 21+
- **Build**: Maven 3.x
- **License**: Apache 2.0
- **DI**: LastaFlute DI
- **Repo**: https://github.com/codelibs/fess-crawler

### Tech Stack

- **HTTP**: Apache HttpComponents 4.5+
- **Extraction**: Apache Tika 3.0+, POI 5.3+, PDFBox 3.0+
- **Testing**: JUnit 4, UTFlute, Mockito 5.7.0
- **Storage**: In-memory (default), OpenSearch (optional)

### Protocols

        byte[] dst = new byte[100];

        int bytesWritten = notifyChange.writeSetupWireFormat(dst, 10);

        // Verify structure:
        // Offset 0-3: Completion Filter (4 bytes)
        // Offset 4-5: FID (2 bytes)
        // Offset 6: Watch Tree (1 byte)
        // Offset 7: Reserved (1 byte)
        assertEquals(8, bytesWritten);

        // Check completion filter

        D = FF(D, A, B, C, X[13], 7);
        C = FF(C, D, A, B, X[14], 11);
        B = FF(B, C, D, A, X[15], 19);

        A = GG(A, B, C, D, X[0], 3);
        D = GG(D, A, B, C, X[4], 5);
        C = GG(C, D, A, B, X[8], 9);
        B = GG(B, C, D, A, X[12], 13);
        A = GG(A, B, C, D, X[1], 3);
        D = GG(D, A, B, C, X[5], 5);
        C = GG(C, D, A, B, X[9], 9);

    public long getTotalReleased() { return totalReleased.get(); }
    public long getActiveRegions() { return totalAllocated.get() - totalReleased.get(); }
}
```

### 4.5 RDMA Provider Implementations

#### 4.5.1 DiSNI Provider (InfiniBand/RoCE)
```java
package jcifs.internal.smb2.rdma.disni;

import com.ibm.disni.*;
import com.ibm.disni.verbs.*;