DfsReferralData initial = null;
                @SuppressWarnings ( "resource" )
                SmbTransportInternal trans = dc != null ? dc.unwrap(SmbTransportInternal.class) : null;
                if ( trans != null ) {
                    // get domain referral

            bufferIndex += this.server.guid.length;
            this.server.oemDomainName = new String();

            if ( this.byteCount > 16 ) {
                // have initial spnego token
                this.server.encryptionKeyLength = this.byteCount - 16;
                this.server.encryptionKey = new byte[this.server.encryptionKeyLength];

        }
        try {
            NegTokenInit tok = new NegTokenInit(initialToken);
            if ( log.isDebugEnabled() ) {
                log.debug("Have initial token " + tok);
            }
            if ( tok.getMechanisms() != null ) {
                Set<ASN1ObjectIdentifier> mechs = new HashSet<>(Arrays.asList(tok.getMechanisms()));

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.Enumeration;

import org.bouncycastle.asn1.*;

import jcifs.util.Hexdump;


/**
 * SPNEGO initial token
 */
@SuppressWarnings ( "javadoc" )
public class NegTokenInit extends SpnegoToken {

    public static final int DELEGATION = 0x80;
    public static final int MUTUAL_AUTHENTICATION = 0x40;

    /**
     * Resets this object disregarding any temporary data present at the
     * time of the invocation of this call.
     */
    public void engineReset () {
        // initial values of MD4 i.e. A, B, C, D
        // as per rfc-1320; they are low-order byte first
        context[0] = 0x67452301;
        context[1] = 0xEFCDAB89;
        context[2] = 0x98BADCFE;
        context[3] = 0x10325476;

    int getReceiveBufferSize ();


    /**
     * 
     * @return the transaction buffer size
     */
    int getTransactionBufferSize ();


    /**
     * 
     * @return number of initial credits the server grants
     */
    int getInitialCredits ();


    /**
     * @param tc
     * @param forceSigning
     * @return whether a connection can be reused for this config
     */

     */

    protected abstract void doConnect() throws Exception;

    /* Tear down a connection. If the hard parameter is true, the diconnection
     * procedure should not initiate or wait for any outstanding requests on
     * this transport.
     */

    protected abstract void doDisconnect( boolean hard ) throws IOException;

     */

    protected abstract void doConnect () throws Exception;


    /*
     * Tear down a connection. If the hard parameter is true, the diconnection
     * procedure should not initiate or wait for any outstanding requests on
     * this transport.
     */

    protected abstract boolean doDisconnect ( boolean hard, boolean inUse ) throws IOException;


    /**

    /**
     * @param share
     * @param service
     * @return tree instance
     */
    SmbTree getSmbTree ( String share, String service );


    /**
     * Initiate reauthentication
     * 
     * @throws CIFSException
     */
    void reauthenticate () throws CIFSException;

    protected static Dfs dfs;

    NtlmPasswordAuthentication auth; // Cannot be null
    SmbTree tree = null;             // Initially null
    String unc;                      // Initially null; set by getUncPath; never ends with '/'
    int fid;                         // Initially 0; set by open()
    int type;
    boolean opened;
    int tree_num;

/**