import org.junit.jupiter.api.Test;

/**
 * Security-focused test cases for BufferCache to verify buffer overflow protection.
 */
public class BufferCacheSecurityTest {

    /**
     * Test that buffer allocation validates size to prevent overflow.
     */
    @Test
    public void testBufferSizeValidation() {
        // When - Get a buffer
        byte[] buffer = BufferCache.getBuffer();

        final int start = bufferIndex;

        final SmbInfoAllocation info = new SmbInfoAllocation();

        // Read total allocation units.
        info.alloc = readInt8(buffer, bufferIndex);
        bufferIndex += 8;

        // read caller available allocation units
        info.free = readInt8(buffer, bufferIndex);
        bufferIndex += 8;

        // skip actual free units
        bufferIndex += 8;

      type == TYPE_PUSH_PROMISE && flags and FLAG_END_PUSH_PROMISE != 0 -> {
        result.replace("HEADERS", "PUSH_PROMISE") // TODO: Avoid allocation.
      }
      type == TYPE_DATA && flags and FLAG_COMPRESSED != 0 -> {
        result.replace("PRIORITY", "COMPRESSED") // TODO: Avoid allocation.
      }
      else -> result
    }
  }

        double avgAllocTimeNs = totalAllocTime.get() / (double) allocations.get();
        double avgReleaseTimeNs = totalReleaseTime.get() / (double) releases.get();

        System.out.printf("Buffer Cache Performance: %d allocs, %d releases in %.2f ms%n", allocations.get(), releases.get(),
                overallTimeMs);
        System.out.printf("  Avg allocation time: %.2f ns%n", avgAllocTimeNs);

	}
}

// Buffer controls memory allocation by the Scanner.
// It sets the initial buffer to use when scanning
// and the maximum size of buffer that may be allocated during scanning.
// The contents of the buffer are ignored.
//
// The maximum token size must be less than the larger of max and cap(buf).
// If max <= cap(buf), [Scanner.Scan] will use this buffer only and do no allocation.
//

 * used in query file system information operations, with constants for information levels.
 *
 * @author mbechler
 */
public interface FileSystemInformation extends Decodable {

    /**
     * SMB information allocation constant.
     */
    byte SMB_INFO_ALLOCATION = -1;

    /**
     * File system size information constant.
     */
    byte FS_SIZE_INFO = 3;
    /**
     * File system full size information constant.

    }

    /**
     * Get a send region from the pool or allocate a new one
     *
     * @param minSize minimum required size
     * @return memory region for sending
     * @throws IOException if allocation fails
     */
    public RdmaMemoryRegion getSendRegion(int minSize) throws IOException {
        if (minSize <= sendBufferSize) {
            RdmaMemoryRegion region = availableSendRegions.poll();

        if (log.isDebugEnabled() && holder.allocationStackTrace != null) {
            StringBuilder sb = new StringBuilder("Allocation stack trace:\n");
            for (StackTraceElement element : holder.allocationStackTrace) {
                sb.append("\tat ").append(element).append("\n");
            }
            log.debug(sb.toString());

        LockFreeBitArray lockFreeBitArray = (LockFreeBitArray) o;
        // TODO(lowasser): avoid allocation here
        return Arrays.equals(toPlainArray(data), toPlainArray(lockFreeBitArray.data));
      }
      return false;
    }

    @Override
    public int hashCode() {
      // TODO(lowasser): avoid allocation here
      return Arrays.hashCode(toPlainArray(data));
    }
  }

import jcifs.internal.util.SMBUtil;

/**
 * Represents the FILE_STANDARD_INFORMATION structure used in SMB2/3 file system control code (FSCC) operations.
 * This structure provides standard file information including allocation size, end-of-file position,
 * number of links, deletion status, and directory flag.
 */
public class FileStandardInfo implements BasicFileInformation {

    private long allocationSize;
    private long endOfFile;