import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.CIFSContext;
import jcifs.CIFSException;
import jcifs.Configuration;
import jcifs.DialectVersion;
import jcifs.RuntimeCIFSException;
import jcifs.SmbConstants;
import jcifs.SmbSession;
import jcifs.internal.CommonServerMessageBlock;
import jcifs.internal.CommonServerMessageBlockRequest;
import jcifs.internal.CommonServerMessageBlockResponse;

                return null;
            }
        } while (this.sbuf[0] == (byte) 0x85); /* Dodge NetBIOS keep-alive */
        /* read smb header */
        if (readn(this.in, this.sbuf, 4, SmbConstants.SMB1_HEADER_LENGTH) < SmbConstants.SMB1_HEADER_LENGTH) {
            return null;
        }

        if (log.isTraceEnabled()) {
            log.trace("New data read: " + this);

        // Set hidden attribute
        int attrs = file.getAttributes();
        file.setAttributes(attrs | SmbConstants.ATTR_HIDDEN);

        // Verify hidden attribute is set
        assertTrue((file.getAttributes() & SmbConstants.ATTR_HIDDEN) != 0, "File should be hidden");

        // File should still be accessible
        assertTrue(file.exists(), "Hidden file should still exist");