import jcifs.CIFSContext;
import jcifs.DfsReferralData;
import jcifs.DfsResolver;
import jcifs.SmbTransport;
import jcifs.internal.dfs.DfsReferralDataImpl;
import jcifs.internal.dfs.DfsReferralDataInternal;


/**
 * Caching DFS resolver implementation
 * 
 * @internal
 */
public class DfsImpl implements DfsResolver {

    private static final DfsReferralDataImpl NEGATIVE_ENTRY = new DfsReferralDataImpl();

                /*
                 * The SMB_COM_NT_CREATE_ANDX response wordCount is wrong. There's an
                 * extra 16 bytes for some "Offline Files (CSC or Client Side Caching)"
                 * junk. We need to bump up the wordCount here so that this method returns
                 * the correct number of bytes for signing purposes. Otherwise we get a
                 * signing verification failure.

     * The operating system detects a change in file size only when the file is written to the disk. For operating
     * systems that use extensive caching, detection occurs only when the cache is sufficiently flushed.s
     */
    public static final int FILE_NOTIFY_CHANGE_SIZE = 0x00000008;

    /**

            c = "SMB_COM_NT_TRANSACT";
            break;
        case SMB_COM_NT_TRANSACT_SECONDARY:
            c = "SMB_COM_NT_TRANSACT_SECONDARY";
            break;
        case SMB_COM_LOCKING_ANDX:
            c = "SMB_COM_LOCKING_ANDX";
            break;
        default:
            c = "UNKNOWN";
        }
        String str = this.errorCode == 0 ? "0" : SmbException.getMessageByCode(this.errorCode);

    /**
     * 
     * 
     * Property <tt>jcifs.netbios.cachePolicy</tt> in minutes (int, default 600)
     * 
     * @return netbios cache timeout, in seconds, 0 - disable caching, -1 - cache forever
     */
    int getNetbiosCachePolicy ();


    /**
     * 
     * @return the maximum size of IO buffers, limits the maximum message size
     */
    int getMaximumBufferSize ();

    /**
     * 
     */
    public static final int SMB2_SHAREFLAG_MANUAL_CACHING = 0x0;
    /**
     * 
     */
    public static final int SMB2_SHAREFLAG_AUTO_CACHING = 0x10;
    /**
     * 
     */
    public static final int SMB2_SHAREFLAG_VDO_CACHING = 0x20;

    /**
     * 
     */
    public static final int SMB2_SHAREFLAG_DFS = 0x1;
    /**
     * 
     */

                // this is so damn unreliable, needs another race-prone query if required
                haveAttributes = false;

                // This seems to be the only way to obtain a reliable (with respect to locking) file size here
                // It is more critical than other attributes because append mode depends on it.
                // We do only really care if we open for writing and not shared for writing

    static final int FILE_SYNCHRONOUS_IO_ALERT = 0x00000010;
    static final int FILE_SYNCHRONOUS_IO_NONALERT = 0x00000020;

    // security flags
    static final int SECURITY_CONTEXT_TRACKING = 0x01;
    static final int SECURITY_EFFECTIVE_ONLY = 0x02;

    private int rootDirectoryFid, extFileAttributes, shareAccess, createDisposition, createOptions, impersonationLevel;
    private long allocationSize;

import org.slf4j.LoggerFactory;

import jcifs.CIFSException;


/**
 * JAAS kerberos authenticator
 * 
 * Either configure JAAS for credential caching or reuse a single instance of this authenticator -otherwise you won't
 * get proper ticket caching.
 * 
 * Be advised that short/NetBIOS name usage is not supported with this authenticator. Always specify full FQDNs/Realm.

    static final int FILE_SYNCHRONOUS_IO_ALERT    = 0x00000010;
    static final int FILE_SYNCHRONOUS_IO_NONALERT = 0x00000020;

    // security flags
    static final int SECURITY_CONTEXT_TRACKING = 0x01;
    static final int SECURITY_EFFECTIVE_ONLY   = 0x02;

    private int rootDirectoryFid,
        extFileAttributes,
        shareAccess,
        createDisposition,
        createOptions,