final SmbTransportInternal trans = this.exclusiveTransport;
                    try (SmbSessionInternal smbSession = trans.getSmbSession(this.ctx, host, targetDomain).unwrap(SmbSessionInternal.class);
                            SmbTreeImpl uct = smbSession.getSmbTree(share, null).unwrap(SmbTreeImpl.class);
                            SmbTreeImpl ct = connectTree(loc, host, share, trans, uct, dr)) {

                    if (dr == null) {
                        if (trans == null) {
                            trans = getDc(domain, auth);
                            if (trans == null) {
                                return null;
                            }
                        }
                        dr = getReferral(trans, domain, root, path, auth);
                        if (dr != null) {

        }
        this.toRemove.add((SmbTransportImpl) trans);
    }

    private void cleanup() {
        SmbTransportImpl trans;
        while ((trans = this.toRemove.poll()) != null) {
            if (log.isDebugEnabled()) {
                log.debug("Removing transport connection " + trans + " (" + System.identityHashCode(trans) + ")");
            }

            setField(resp, jcifs.internal.smb1.trans.SmbComTransactionResponse.class, "results", res);
            setField(resp, Trans2FindFirst2Response.class, "sid", 42);
            setField(resp, Trans2FindFirst2Response.class, "resumeKey", 100);
            setField(resp, Trans2FindFirst2Response.class, "lastName", "b");
            setField(resp, jcifs.internal.smb1.trans.SmbComTransactionResponse.class, "status", 0);

import jcifs.SmbPipeHandle;
import jcifs.SmbPipeResource;
import jcifs.internal.smb1.trans.TransCallNamedPipe;
import jcifs.internal.smb1.trans.TransCallNamedPipeResponse;
import jcifs.internal.smb1.trans.TransTransactNamedPipe;
import jcifs.internal.smb1.trans.TransTransactNamedPipeResponse;
import jcifs.internal.smb1.trans.TransWaitNamedPipe;
import jcifs.internal.smb1.trans.TransWaitNamedPipeResponse;
import jcifs.internal.smb2.ioctl.Smb2IoctlRequest;

                @SuppressWarnings("resource")
                final SmbTransportInternal trans = dc != null ? dc.unwrap(SmbTransportInternal.class) : null;
                if (trans != null) {
                    // get domain referral
                    initial = trans.getDfsReferrals(tf.withAnonymousCredentials(), "", trans.getRemoteHostName(), authDomain, 0);
                }
                if (initial != null) {

import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.junit.jupiter.MockitoExtension;

import jcifs.CIFSException;
import jcifs.Configuration;
import jcifs.internal.smb1.trans.TransPeekNamedPipe;
import jcifs.internal.smb1.trans.TransPeekNamedPipeResponse;
import jcifs.internal.smb2.ioctl.Smb2IoctlRequest;
import jcifs.internal.smb2.ioctl.Smb2IoctlResponse;
import jcifs.internal.smb2.ioctl.SrvPipePeekResponse;

            }
            throw se;
        }
    }

    /**
     * @param trans
     * @param sess
     * @throws CIFSException
     *
     */
    private void validateNegotiation(final SmbTransportImpl trans, final SmbSessionImpl sess) throws CIFSException {
        if (!trans.isSMB2() || trans.getDigest() == null || !sess.getConfig().isRequireSecureNegotiate()) {

        final UniAddress dc = new UniAddress(addr);
        try (SmbTransportInternal trans = tf.getTransportPool()
                .getSmbTransport(tf, dc, 0, false, tf.hasDefaultCredentials() && tf.getConfig().isIpcSigningEnforced())
                .unwrap(SmbTransportInternal.class)) {
            if (!tf.hasDefaultCredentials()) {
                trans.ensureConnected();
                log.warn("""

     */
    public static byte[] getChallenge(final UniAddress dc, final int port) throws SmbException, UnknownHostException {
        final SmbTransport trans = SmbTransport.getSmbTransport(dc, port);
        trans.connect();
        return trans.server.encryptionKey;
    }

    /**
     * Authenticate arbitrary credentials represented by the