* DFS referral information for distributed file system path resolution.
 */
public class Trans2GetDfsReferral extends SmbComTransaction {

    private final int maxReferralLevel;

    private final DfsReferralRequestBuffer request;

    /**
     * Constructs a Trans2GetDfsReferral request with default referral level.
     *
     * @param config the configuration to use

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.smb1.smb1;

class Trans2GetDfsReferral extends SmbComTransaction {

    private final int maxReferralLevel;

    Trans2GetDfsReferral(final String filename) {
        this(filename, 3);
    }

    Trans2GetDfsReferral(final String filename, final int maxReferralLevel) {
        this.maxReferralLevel = maxReferralLevel;

    void testNullPath() {
        Trans2GetDfsReferral cmd = new Trans2GetDfsReferral(null);
        byte[] buffer = new byte[10];
        assertThrows(NullPointerException.class, () -> cmd.writeParametersWireFormat(buffer, 0));
    }

    @Nested
    @DisplayName("read methods are no‑ops")
    class ReadMethods {
        Trans2GetDfsReferral cmd = new Trans2GetDfsReferral("/foo");

        @Test

        // When & Then
        assertDoesNotThrow(() -> new Trans2GetDfsReferral(mockConfig, ""));
    }

    @Test
    @DisplayName("isForceUnicode should always return true")
    void testIsForceUnicode() {
        // Given
        trans2GetDfsReferral = new Trans2GetDfsReferral(mockConfig, "test");

        // When
        boolean result = trans2GetDfsReferral.isForceUnicode();

        // Then
        assertTrue(result);

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        final SmbTree ipc = getSmbSession(auth).getSmbTree("IPC$", null);
        final Trans2GetDfsReferralResponse resp = new Trans2GetDfsReferralResponse();
        ipc.send(new Trans2GetDfsReferral(path), resp);

        if (resp.numReferrals == 0) {
            return null;
        }
        if (rn == 0 || resp.numReferrals < rn) {
            rn = resp.numReferrals;
        }

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