private int maxMpxCount;
    private int snd_buf_size;
    private int recv_buf_size;
    private int tx_buf_size;

    private int capabilities;
    private final int sessionKey = 0x00000000;
    private boolean useUnicode;

    /**
     * Creates a new SMB1 negotiate response.
     *
     * @param ctx the CIFS context
     */
    public SmbComNegotiateResponse(final CIFSContext ctx) {

    public static final int WITNESS_HEARTBEAT = 3;

    // Common return codes from MS-SWN specification
    /** Operation completed successfully */
    public static final int ERROR_SUCCESS = 0x00000000;
    /** Invalid parameter was passed to the operation */
    public static final int ERROR_INVALID_PARAMETER = 0x00000057;
    /** Buffer provided is insufficient */

    /** Status indicating successful negotiation */
    public static final int STATUS_SUCCESS = 0x00000000;
    /** Status indicating SMB Direct is not supported */
    public static final int STATUS_NOT_SUPPORTED = 0x00000001;
    /** Status indicating insufficient resources for SMB Direct */
    public static final int STATUS_INSUFFICIENT_RESOURCES = 0x00000002;

    // Message fields
    private int minVersion;
    private int maxVersion;

    assertThat(countFrames(logs, "FINE: >> 0x00000000     8 PING          "))
      .isEqualTo(1)
    assertThat(countFrames(logs, "FINE: << 0x00000000     8 PING          "))
      .isEqualTo(1)
    assertThat(countFrames(logs, "FINE: >> 0x00000000     8 PING          ACK"))
      .isEqualTo(1)
    assertThat(countFrames(logs, "FINE: << 0x00000000     8 PING          ACK"))
      .isEqualTo(1)
  }

    Failure in SSL library, usually a protocol error
        error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake
        failure (external/openssl/ssl/s23_clnt.c:770 0x7f2728a53ea0:0x00000000)
    at com.android.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)
```

You can check a web server's configuration using [Qualys SSL Labs][qualys]. OkHttp's TLS

    private static final int FILE_NOTIFY_CHANGE_DIR_NAME = 0x00000002;
    private static final int FILE_NOTIFY_CHANGE_ATTRIBUTES = 0x00000004;
    private static final int FILE_NOTIFY_CHANGE_SIZE = 0x00000008;
    private static final int FILE_NOTIFY_CHANGE_LAST_WRITE = 0x00000010;

    /**
     * Change notification handle
     */
    public static class ChangeNotificationHandle {

    /* Don't bother to edit this. Everthing within the interface
     * block is automatically generated from the ntstatus package.
     */

    /** The operation completed successfully */
    int NT_STATUS_SUCCESS = 0x00000000;
    /** The requested operation was unsuccessful */
    int NT_STATUS_UNSUCCESSFUL = 0xC0000001;
    /** The requested operation is not implemented */
    int NT_STATUS_NOT_IMPLEMENTED = 0xC0000002;

        SMBUtil.writeInt4(status, buf, start + 8);
        // Command at +12
        SMBUtil.writeInt2(command, buf, start + 12);
        // Flags at +16: server-to-redirector
        SMBUtil.writeInt4(0x00000001, buf, start + 16);
        // SessionId at +40 (sync header)
        SMBUtil.writeInt8(sessionId, buf, start + 40);
    }

    /**
     * Build a SESSION_SETUP response body with specified flags and security blob.

        verify(handle, times(1)).sendrecv(any(jcifs.dcerpc.msrpc.MsrpcLookupSids.class));
    }

    @ParameterizedTest
    @ValueSource(ints = { NtStatus.NT_STATUS_SUCCESS, NtStatus.NT_STATUS_NONE_MAPPED, 0x00000107 })
    @DisplayName("resolveSids(DcerpcHandle,...) accepts success/none/some-not-mapped codes")
    void resolveSids_allowsCertainRetvals_noThrow(int ret) throws Exception {

        // Write Command = SMB2_IOCTL (0x000B) at offset 12
        SMBUtil.writeInt2(0x000B, hdr, 12);
        // Mark as server response to be realistic (optional)
        SMBUtil.writeInt4(0x00000001, hdr, 16); // Flags = SMB2_FLAGS_SERVER_TO_REDIR
        return hdr;
    }

    // Helper: build SMB2 IOCTL response body (without header) with structureSize=49