CoreProtocolHandler.java

/*
 * Copyright (C) 2006-2008 Alfresco Software Limited.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 * As a special exception to the terms and conditions of version 2.0 of 
 * the GPL, you may redistribute this Program in connection with Free/Libre 
 * and Open Source Software ("FLOSS") applications as described in Alfresco's 
 * FLOSS exception.  You should have recieved a copy of the text describing 
 * the FLOSS exception, and it is also available here: 
 * http://www.alfresco.com/legal/licensing"
 */

package org.alfresco.jlan.smb.server;

import java.io.IOException;

import org.alfresco.jlan.debug.Debug;
import org.alfresco.jlan.netbios.RFCNetBIOSProtocol;
import org.alfresco.jlan.server.auth.ICifsAuthenticator;
import org.alfresco.jlan.server.auth.InvalidUserException;
import org.alfresco.jlan.server.core.InvalidDeviceInterfaceException;
import org.alfresco.jlan.server.core.ShareType;
import org.alfresco.jlan.server.core.SharedDevice;
import org.alfresco.jlan.server.filesys.AccessDeniedException;
import org.alfresco.jlan.server.filesys.AccessMode;
import org.alfresco.jlan.server.filesys.DirectoryNotEmptyException;
import org.alfresco.jlan.server.filesys.DiskDeviceContext;
import org.alfresco.jlan.server.filesys.DiskInterface;
import org.alfresco.jlan.server.filesys.FileAccess;
import org.alfresco.jlan.server.filesys.FileAction;
import org.alfresco.jlan.server.filesys.FileAttribute;
import org.alfresco.jlan.server.filesys.FileExistsException;
import org.alfresco.jlan.server.filesys.FileInfo;
import org.alfresco.jlan.server.filesys.FileName;
import org.alfresco.jlan.server.filesys.FileOpenParams;
import org.alfresco.jlan.server.filesys.FileSharingException;
import org.alfresco.jlan.server.filesys.FileStatus;
import org.alfresco.jlan.server.filesys.NetworkFile;
import org.alfresco.jlan.server.filesys.SearchContext;
import org.alfresco.jlan.server.filesys.SrvDiskInfo;
import org.alfresco.jlan.server.filesys.TooManyConnectionsException;
import org.alfresco.jlan.server.filesys.TooManyFilesException;
import org.alfresco.jlan.server.filesys.TreeConnection;
import org.alfresco.jlan.server.filesys.VolumeInfo;
import org.alfresco.jlan.smb.Capability;
import org.alfresco.jlan.smb.DataType;
import org.alfresco.jlan.smb.InvalidUNCPathException;
import org.alfresco.jlan.smb.PCShare;
import org.alfresco.jlan.smb.PacketType;
import org.alfresco.jlan.smb.SMBDate;
import org.alfresco.jlan.smb.SMBStatus;
import org.alfresco.jlan.util.DataPacker;
import org.alfresco.jlan.util.WildCard;

/**
 * Core SMB protocol handler class.
 * 
 * @author gkspencer
 */
class CoreProtocolHandler extends ProtocolHandler {

	// Special resume ids for '.' and '..' pseudo directories

	private static final int RESUME_START 	= 0x00008003;
	private static final int RESUME_DOT 	= 0x00008002;
	private static final int RESUME_DOTDOT 	= 0x00008001;

	// Maximum value that can be stored in a parameter word

	private static final int MaxWordValue = 0x0000FFFF;

	// File attribute mask, for standard attributes only

	protected static final int StandardAttributes = 0x3F;

	// Search information per file length
	
	protected static final int SearchInfoLen	= 43;
	
    // Invalid file name characters
    
    private static final String InvalidFileNameChars 		= "\"/:|<>*?";
    private static final String InvalidFileNameCharsSearch	= "\"/:|<>";
    
	/**
	 * Create a new core SMB protocol handler.
	 */
	protected CoreProtocolHandler() {
	}

	/**
	 * Class constructor
	 * 
	 * @param sess SMBSrvSession
	 */
	protected CoreProtocolHandler(SMBSrvSession sess) {
		super(sess);
	}

	/**
	 * Return the protocol name
	 * 
	 * @return String
	 */
	public String getName() {
		return "Core Protocol";
	}

	/**
	 * Map a Java exception class to an SMB error code, and return an error response to the caller.
	 * 
	 * @param ex java.lang.Exception
	 */
	protected final void MapExceptionToSMBError(Exception ex) {

	}

    /**
     * Check if a path contains any illegal characters, for file/create open/create/rename/get info
     * 
     * @param path String
     * @return boolean
     */
    protected boolean isValidPath(String path) {
    	
    	// Scan the path for invalid path characters
    	
    	for ( int i = 0; i < InvalidFileNameChars.length(); i++) {
    		if ( path.indexOf( InvalidFileNameChars.charAt( i)) != -1)
    			return false;
    	}
    	
    	// Path looks valid
    	
    	return true;
    }
    
    /**
     * Check if a path contains any illegal characters, for a folder search
     * 
     * @param path String
     * @return boolean
     */
    protected boolean isValidSearchPath(String path) {
    	
    	// Scan the path for invalid path characters
    	
    	for ( int i = 0; i < InvalidFileNameCharsSearch.length(); i++) {
    		if ( path.indexOf( InvalidFileNameCharsSearch.charAt( i)) != -1)
    			return false;
    	}
    	
    	// Path looks valid
    	
    	return true;
    }
    
	/**
	 * Pack file information for a search into the specified buffer.
	 * 
	 * @param buf byte[] Buffer to store data.
	 * @param bufPos int Position to start storing data.
	 * @param searchStr Search context string.
	 * @param resumeId int Resume id
	 * @param searchId Search context id
	 * @param info File data to be packed.
	 * @return int Next available buffer position.
	 */
	protected final int packSearchInfo(byte[] buf, int bufPos, String searchStr, int resumeId, int searchId, FileInfo info) {

		// Pack the resume key

		CoreResumeKey.putResumeKey(buf, bufPos, searchStr, resumeId + (searchId << 16));
		bufPos += CoreResumeKey.LENGTH;

		// Pack the file information

		buf[bufPos++] = (byte) (info.getFileAttributes() & StandardAttributes);

		SMBDate dateTime = new SMBDate(info.getModifyDateTime());
		if ( dateTime != null) {
			DataPacker.putIntelShort(dateTime.asSMBTime(), buf, bufPos);
			DataPacker.putIntelShort(dateTime.asSMBDate(), buf, bufPos + 2);
		}
		else {
			DataPacker.putIntelShort(0, buf, bufPos);
			DataPacker.putIntelShort(0, buf, bufPos + 2);
		}
		bufPos += 4;

		DataPacker.putIntelInt((int) info.getSize(), buf, bufPos);
		bufPos += 4;

		StringBuilder str = new StringBuilder();

		str.append(info.getFileName());

		while (str.length() < 13)
			str.append('\0');

		if ( str.length() > 12)
			str.setLength(12);

		DataPacker.putString( str.toString().toUpperCase(), buf, bufPos, true);
		bufPos += 13;

		// Return the new buffer position

		return bufPos;
	}

	/**
	 * Check if the specified path exists, and is a directory.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception SMBSrvException The exception description.
	 */
	protected void procCheckDirectory(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid check directory request

		if ( smbPkt.checkPacketIsValid(0, 2) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasReadAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the data bytes position and length

		int dataPos = smbPkt.getByteOffset();
		int dataLen = smbPkt.getByteCount();
		byte[] buf  = smbPkt.getBuffer();

		// Extract the directory name

		String dirName = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, smbPkt.isUnicode());
		if ( dirName == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("Directory Check [" + treeId + "] name=" + dirName);

		// Access the disk interface and check for the directory

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Check that the specified path exists, and it is a directory

			if ( disk.fileExists(m_sess, conn, dirName) == FileStatus.DirectoryExists) {

				// The path exists and is a directory, build the valid path response.

				smbPkt.setParameterCount(0);
				smbPkt.setByteCount(0);

				// Send the response packet

				m_sess.sendResponseSMB(smbPkt);
			}
			else {

				// The path does not exist, or is not a directory.
				//
				// DOS clients depend on the 'Directory Invalid' (SMB_ERR_BAD_PATH) message being
				// returned.

				m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSDirectoryInvalid, SMBStatus.ErrDos);
			}
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {

			// Failed to delete the directory

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSDirectoryInvalid, SMBStatus.ErrDos);
			return;
		}
	}

	/**
	 * Close a file that has been opened on the server.
	 * 
	 * @param smbPkt Response SMB packet.
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procCloseFile(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid file close request

		if ( smbPkt.checkPacketIsValid(3, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasReadAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the file id from the request

		int fid   = smbPkt.getParameter(0);
		int ftime = smbPkt.getParameter(1);
		int fdate = smbPkt.getParameter(2);

		NetworkFile netFile = conn.findFile(fid);

		if ( netFile == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidHandle, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("File close [" + treeId + "] fid=" + fid);

		// Close the file

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Close the file
			//
			// The disk interface may be null if the file is a named pipe file

			if ( disk != null)
				disk.closeFile(m_sess, conn, netFile);

			// Indicate that the file has been closed

			netFile.setClosed(true);
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {
		}

		// Remove the file from the connections list of open files

		conn.removeFile(fid, getSession());

		// Build the close file response

		smbPkt.setParameterCount(0);
		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Create a new directory.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procCreateDirectory(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid create directory request

		if ( smbPkt.checkPacketIsValid(0, 2) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasWriteAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the data bytes position and length

		int dataPos = smbPkt.getByteOffset();
		int dataLen = smbPkt.getByteCount();
		byte[] buf  = smbPkt.getBuffer();

		// Extract the directory name

		String dirName = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, smbPkt.isUnicode());
		if ( dirName == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

        // Check if the file name is valid
        
        if ( isValidPath( dirName) == false) {
            m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTObjectNameInvalid, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
            return;
        }
        
		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("Directory Create [" + treeId + "] name=" + dirName);

		// Access the disk interface and create the new directory

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Directory creation parameters

			FileOpenParams params = new FileOpenParams(dirName, FileAction.CreateNotExist, AccessMode.ReadWrite,
					FileAttribute.NTDirectory, smbPkt.getProcessIdFull());

			// Create the new directory

			disk.createDirectory(m_sess, conn, params);
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (FileExistsException ex) {

			// Failed to create the directory

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTObjectNameCollision, SMBStatus.DOSFileAlreadyExists, SMBStatus.ErrDos);
			return;
		}
		catch (AccessDeniedException ex) {

			// Not allowed to create directory

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTAccessDenied, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {

			// Failed to create the directory

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSDirectoryInvalid, SMBStatus.ErrDos);
			return;
		}

		// Build the create directory response

		smbPkt.setParameterCount(0);
		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Create a new file on the server.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procCreateFile(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid file create request

		if ( smbPkt.checkPacketIsValid(3, 2) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasWriteAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the data bytes position and length

		int dataPos = smbPkt.getByteOffset();
		int dataLen = smbPkt.getByteCount();
		byte[] buf  = smbPkt.getBuffer();

		// Extract the file name

		String fileName = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, smbPkt.isUnicode());
		if ( fileName == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

        // Check if the file name is valid
        
        if ( isValidPath( fileName) == false) {
            m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTObjectNameInvalid, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
            return;
        }
        
		// Get the required file attributes for the new file

		int attr = smbPkt.getParameter(0);

		// Create the file parameters to be passed to the disk interface

		FileOpenParams params = new FileOpenParams(fileName, FileAction.CreateNotExist, AccessMode.ReadWrite, attr, smbPkt.getProcessIdFull());

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("File Create [" + treeId + "] params=" + params);

		// Access the disk interface and create the new file

		int fid;
		NetworkFile netFile = null;

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Create the new file

			netFile = disk.createFile(m_sess, conn, params);

			// Add the file to the list of open files for this tree connection

			fid = conn.addFile(netFile, getSession());
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (TooManyFilesException ex) {

			// Too many files are open on this connection, cannot open any more files.

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSTooManyOpenFiles, SMBStatus.ErrDos);
			return;
		}
		catch (FileExistsException ex) {

			// File with the requested name already exists

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSFileAlreadyExists, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {

			// Failed to open the file

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSFileNotFound, SMBStatus.ErrDos);
			return;
		}

		// Build the create file response

		smbPkt.setParameterCount(1);
		smbPkt.setParameter(0, fid);
		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Create a temporary file.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.server.SMBSrvException The exception description.
	 */
	protected void procCreateTemporaryFile(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

	}

	/**
	 * Delete a directory.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procDeleteDirectory(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid delete directory request

		if ( smbPkt.checkPacketIsValid(0, 2) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasWriteAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the data bytes position and length

		int dataPos = smbPkt.getByteOffset();
		int dataLen = smbPkt.getByteCount();
		byte[] buf  = smbPkt.getBuffer();

		// Extract the directory name

		String dirName = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, smbPkt.isUnicode());

		if ( dirName == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

        // Check if the file name is valid
        
        if ( isValidPath( dirName) == false) {
            m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTObjectNameInvalid, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
            return;
        }
        
		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("Directory Delete [" + treeId + "] name=" + dirName);

		// Access the disk interface and delete the directory

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Delete the directory

			disk.deleteDirectory(m_sess, conn, dirName);
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (AccessDeniedException ex) {

			// Not allowed to delete the directory

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTAccessDenied, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}
		catch (DirectoryNotEmptyException ex) {

			// Directory not empty

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSDirectoryNotEmpty, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {

			// Failed to delete the directory

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSDirectoryInvalid, SMBStatus.ErrDos);
			return;
		}

		// Build the delete directory response

		smbPkt.setParameterCount(0);
		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Delete a file.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procDeleteFile(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid file delete request

		if ( smbPkt.checkPacketIsValid(1, 2) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasWriteAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the data bytes position and length

		int dataPos = smbPkt.getByteOffset();
		int dataLen = smbPkt.getByteCount();
		byte[] buf  = smbPkt.getBuffer();

		// Extract the file name

		String fileName = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, smbPkt.isUnicode());
		if ( fileName == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

        // Check if the file name is valid
        
        if ( isValidPath( fileName) == false) {
            m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTObjectNameInvalid, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
            return;
        }
        
		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("File Delete [" + treeId + "] name=" + fileName);

		// Access the disk interface and delete the file(s)

		int fid;
		NetworkFile netFile = null;

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Delete file(s)

			disk.deleteFile(m_sess, conn, fileName);
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {

			// Failed to open the file

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSFileNotFound, SMBStatus.ErrDos);
			return;
		}

		// Build the delete file response

		smbPkt.setParameterCount(0);
		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Get disk attributes processing.
	 * 
	 * @param smbPkt Response SMB packet.
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procDiskAttributes(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_INFO))
			m_sess.debugPrintln("Get disk attributes");

		// Parameter and byte count should be zero

		if ( smbPkt.getParameterCount() != 0 && smbPkt.getByteCount() != 0) {

			// Send an error response

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree connection details

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVInvalidTID, SMBStatus.ErrSrv);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasReadAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the disk interface from the shared device

		DiskInterface disk = null;
		DiskDeviceContext diskCtx = null;

		try {
			disk = (DiskInterface) conn.getSharedDevice().getInterface();
			diskCtx = (DiskDeviceContext) conn.getContext();
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Create a disk information object and ask the disk interface to fill in the details

		SrvDiskInfo diskInfo = getDiskInformation(disk, diskCtx);

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_INFO))
			m_sess.debugPrintln("  Disk info - total=" + diskInfo.getTotalUnits() + ", free=" + diskInfo.getFreeUnits()
					+ ", blocksPerUnit=" + diskInfo.getBlocksPerAllocationUnit() + ", blockSize=" + diskInfo.getBlockSize());

		// Check if the disk size information needs scaling to fit into 16bit values

		long totUnits = diskInfo.getTotalUnits();
		long freeUnits = diskInfo.getFreeUnits();
		int blocksUnit = diskInfo.getBlocksPerAllocationUnit();

		while (totUnits > MaxWordValue && blocksUnit <= MaxWordValue) {

			// Increase the blocks per unit and decrease the total/free units

			blocksUnit *= 2;

			totUnits = totUnits / 2L;
			freeUnits = freeUnits / 2L;
		}

		// Check if the total/free units fit into a 16bit value

		if ( totUnits > MaxWordValue || blocksUnit > MaxWordValue) {

			// Just use dummy values, cannot fit the disk size into 16bits

			totUnits = MaxWordValue;

			if ( freeUnits > MaxWordValue)
				freeUnits = MaxWordValue / 2;

			if ( blocksUnit > MaxWordValue)
				blocksUnit = MaxWordValue;
		}

		// Build the reply SMB

		smbPkt.setParameterCount(5);

		smbPkt.setParameter(0, (int) totUnits);
		smbPkt.setParameter(1, blocksUnit);
		smbPkt.setParameter(2, diskInfo.getBlockSize());
		smbPkt.setParameter(3, (int) freeUnits);
		smbPkt.setParameter(4, 0);

		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Echo packet request.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procEcho(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid echo request

		if ( smbPkt.checkPacketIsValid(1, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the echo count from the request

		int echoCnt = smbPkt.getParameter(0);

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_ECHO))
			m_sess.debugPrintln("Echo - Count = " + echoCnt);

		// Loop until all echo packets have been sent

		int echoSeq = 1;

		while (echoCnt > 0) {

			// Set the echo response sequence number

			smbPkt.setParameter(0, echoSeq++);

			// Echo the received packet

			m_sess.sendResponseSMB(smbPkt);
			echoCnt--;

			// Debug

			if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_ECHO))
				m_sess.debugPrintln("Echo Packet, Seq = " + echoSeq);
		}
	}

	/**
	 * Flush the specified file.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procFlushFile(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid file flush request

		if ( smbPkt.checkPacketIsValid(1, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasWriteAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the file id from the request

		int fid = smbPkt.getParameter(0);

		NetworkFile netFile = conn.findFile(fid);

		if ( netFile == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidHandle, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("File Flush [" + netFile.getFileId() + "]");

		// Flush the file

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Flush the file

			disk.flushFile(m_sess, conn, netFile);
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {

			// Debug

			if ( Debug.EnableError && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
				m_sess.debugPrintln("File Flush Error [" + netFile.getFileId() + "] : " + ex.toString());

			// Failed to read the file

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.HRDWriteFault, SMBStatus.ErrHrd);
			return;
		}

		// Send the flush response

		smbPkt.setParameterCount(0);
		smbPkt.setByteCount(0);

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Get the file attributes for the specified file.
	 * 
	 * @param smbPkt Response SMB packet.
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procGetFileAttributes(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid query file information request

		if ( smbPkt.checkPacketIsValid(0, 2) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasReadAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the data bytes position and length

		int dataPos = smbPkt.getByteOffset();
		int dataLen = smbPkt.getByteCount();
		byte[] buf  = smbPkt.getBuffer();

		// Extract the file name

		String fileName = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, smbPkt.isUnicode());
		if ( fileName == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("Get File Information [" + treeId + "] name=" + fileName);

		// Access the disk interface and get the file information

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Get the file information for the specified file/directory

			FileInfo finfo = disk.getFileInformation(m_sess, conn, fileName);
			if ( finfo != null) {

				// Mask the file attributes

				finfo.setFileAttributes(finfo.getFileAttributes() & StandardAttributes);

				// Check if the share is read-only, if so then force the read-only flag for the file

				if ( conn.getSharedDevice().isReadOnly() && finfo.isReadOnly() == false) {

					// Make sure the read-only attribute is set

					finfo.setFileAttributes(finfo.getFileAttributes() + FileAttribute.ReadOnly);
				}

				// Return the file information

				smbPkt.setParameterCount(10);
				smbPkt.setParameter(0, finfo.getFileAttributes());
				if ( finfo.getModifyDateTime() != 0L) {
					SMBDate dateTime = new SMBDate(finfo.getModifyDateTime());
					smbPkt.setParameter(1, dateTime.asSMBTime());
					smbPkt.setParameter(2, dateTime.asSMBDate());
				}
				else {
					smbPkt.setParameter(1, 0);
					smbPkt.setParameter(2, 0);
				}
				smbPkt.setParameter(3, (int) finfo.getSize() & 0x0000FFFF);
				smbPkt.setParameter(4, (int) (finfo.getSize() & 0xFFFF0000) >> 16);

				for (int i = 5; i < 10; i++)
					smbPkt.setParameter(i, 0);

				smbPkt.setByteCount(0);

				// Send the response packet

				m_sess.sendResponseSMB(smbPkt);
				return;
			}
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {
		}

		// Failed to get the file information

		m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSFileNotFound, SMBStatus.ErrDos);
	}

	/**
	 * Get file information.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procGetFileInformation(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid query file information2 request

		if ( smbPkt.checkPacketIsValid(1, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasReadAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the file id from the request

		int fid = smbPkt.getParameter(0);
		NetworkFile netFile = conn.findFile(fid);

		if ( netFile == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidHandle, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("Get File Information 2 [" + netFile.getFileId() + "]");

		// Access the disk interface and get the file information

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Get the file information for the specified file/directory

			FileInfo finfo = disk.getFileInformation(m_sess, conn, netFile.getFullName());
			if ( finfo != null) {

				// Mask the file attributes

				finfo.setFileAttributes(finfo.getFileAttributes() & StandardAttributes);

				// Check if the share is read-only, if so then force the read-only flag for the file

				if ( conn.getSharedDevice().isReadOnly() && finfo.isReadOnly() == false) {

					// Make sure the read-only attribute is set

					finfo.setFileAttributes(finfo.getFileAttributes() + FileAttribute.ReadOnly);
				}

				// Initialize the return packet, no data bytes

				smbPkt.setParameterCount(11);
				smbPkt.setByteCount(0);

				// Return the file information
				//
				// Creation date/time

				SMBDate dateTime = new SMBDate(0);

				if ( finfo.getCreationDateTime() != 0L) {
					dateTime.setTime(finfo.getCreationDateTime());
					smbPkt.setParameter(0, dateTime.asSMBDate());
					smbPkt.setParameter(1, dateTime.asSMBTime());
				}
				else {
					smbPkt.setParameter(0, 0);
					smbPkt.setParameter(1, 0);
				}

				// Access date/time

				if ( finfo.getAccessDateTime() != 0L) {
					dateTime.setTime(finfo.getAccessDateTime());
					smbPkt.setParameter(2, dateTime.asSMBDate());
					smbPkt.setParameter(3, dateTime.asSMBTime());
				}
				else {
					smbPkt.setParameter(2, 0);
					smbPkt.setParameter(3, 0);
				}

				// Modify date/time

				if ( finfo.getModifyDateTime() != 0L) {
					dateTime.setTime(finfo.getModifyDateTime());
					smbPkt.setParameter(4, dateTime.asSMBDate());
					smbPkt.setParameter(5, dateTime.asSMBTime());
				}
				else {
					smbPkt.setParameter(4, 0);
					smbPkt.setParameter(5, 0);
				}

				// File data size

				smbPkt.setParameter(6, (int) finfo.getSize() & 0x0000FFFF);
				smbPkt.setParameter(7, (int) (finfo.getSize() & 0xFFFF0000) >> 16);

				// File allocation size

				smbPkt.setParameter(8, (int) finfo.getSize() & 0x0000FFFF);
				smbPkt.setParameter(9, (int) (finfo.getSize() & 0xFFFF0000) >> 16);

				// File attributes

				smbPkt.setParameter(10, finfo.getFileAttributes());

				// Send the response packet

				m_sess.sendResponseSMB(smbPkt);
				return;
			}
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {
		}

		// Failed to get the file information

		m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSFileNotFound, SMBStatus.ErrDos);
	}

	/**
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.server.SMBSrvException The exception description.
	 */
	protected void procLockFile(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid lock file request

		if ( smbPkt.checkPacketIsValid(5, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasReadAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the file id from the request

		int fid      = smbPkt.getParameter(0);
		long lockcnt = smbPkt.getParameterLong(1);
		long lockoff = smbPkt.getParameterLong(3);

		NetworkFile netFile = conn.findFile(fid);

		if ( netFile == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidHandle, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILEIO))
			m_sess.debugPrintln("File Lock [" + netFile.getFileId() + "] : Offset=" + lockoff + " ,Count=" + lockcnt);

		// ***** Always return a success status, simulated locking ****
		//
		// Build the lock file response

		smbPkt.setParameterCount(0);
		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Open a file on the server.
	 * 
	 * @param smbPkt Response SMB packet.
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procOpenFile(SMBSrvPacket smbPkt)
		throws IOException, SMBSrvException {

		// Check that the received packet looks like a valid file open request

		if ( smbPkt.checkPacketIsValid(2, 2) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasReadAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the data bytes position and length

		int dataPos = smbPkt.getByteOffset();
		int dataLen = smbPkt.getByteCount();
		byte[] buf  = smbPkt.getBuffer();

		// Extract the file name

		String fileName = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, smbPkt.isUnicode());
		if ( fileName == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Get the required access mode and the file attributes

		int mode = smbPkt.getParameter(0);
		int attr = smbPkt.getParameter(1);

		// Create the file open parameters to be passed to the disk interface

		FileOpenParams params = new FileOpenParams(fileName, mode, AccessMode.ReadWrite, attr, smbPkt.getProcessIdFull());
		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("File Open [" + treeId + "] params=" + params);

		// Access the disk interface and open the requested file

		int fid;
		NetworkFile netFile = null;

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Open the requested file

			netFile = disk.openFile(m_sess, conn, params);

			// Add the file to the list of open files for this tree connection

			fid = conn.addFile(netFile, getSession());
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (TooManyFilesException ex) {

			// Too many files are open on this connection, cannot open any more files.

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSTooManyOpenFiles, SMBStatus.ErrDos);
			return;
		}
		catch (AccessDeniedException ex) {

			// File is not accessible, or file is actually a directory

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}
		catch (FileSharingException ex) {

			// Return a sharing violation error

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSFileSharingConflict, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {

			// Failed to open the file

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSFileNotFound, SMBStatus.ErrDos);
			return;
		}

		// Build the open file response

		smbPkt.setParameterCount(7);

		smbPkt.setParameter(0, fid);
		smbPkt.setParameter(1, 0); // file attributes

		if ( netFile.hasModifyDate()) {
			smbPkt.setParameterLong(2, (int) (netFile.getModifyDate() / 1000L));
		}
		else
			smbPkt.setParameterLong(2, 0);

		smbPkt.setParameterLong(4, netFile.getFileSizeInt()); // file size
		smbPkt.setParameter(6, netFile.getGrantedAccess());

		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Process exit, close all open files.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.server.SMBSrvException The exception description.
	 */
	protected void procProcessExit(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid process exit request

		if ( smbPkt.checkPacketIsValid(0, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("Process Exit - Open files = " + conn.openFileCount());

		// Close all open files

		if ( conn.openFileCount() > 0) {

			// Close all files on the connection

			conn.closeConnection(getSession());
		}

		// Build the process exit response

		smbPkt.setParameterCount(0);
		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Read from a file that has been opened on the server.
	 * 
	 * @param smbPkt Response SMB packet.
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procReadFile(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid file read request

		if ( smbPkt.checkPacketIsValid(5, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasReadAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the file id from the request

		int fid    = smbPkt.getParameter(0);
		int reqcnt = smbPkt.getParameter(1);
		int reqoff = smbPkt.getParameterLong(2);

		NetworkFile netFile = conn.findFile(fid);

		if ( netFile == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidHandle, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILEIO))
			m_sess.debugPrintln("File Read [" + netFile.getFileId() + "] : Size=" + reqcnt + " ,Pos=" + reqoff);

		// Read data from the file

		SMBSrvPacket respPkt = smbPkt;
		
		byte[] buf = respPkt.getBuffer();
		int rdlen = 0;

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Calculate the buffer size required for the response
			
			int dataOff = smbPkt.getByteOffset() + 3;
			
			if ( m_sess.hasClientCapability(Capability.LargeRead) == false) {
				
				// Make sure the requested count is not larger than the client maximum buffer size
				
				int maxClientCnt = m_sess.getClientMaximumBufferSize() - dataOff;
				
				if ( reqcnt > maxClientCnt)
					reqcnt = maxClientCnt;

				// Debug

				if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILEIO))
					m_sess.debugPrintln("File Read [" + netFile.getFileId() + "] Limited to " + reqcnt);
			}
				
			// Check if the requested data will fit into the current packet
			
			if ( reqcnt > ( buf.length - dataOff)) {

				// Allocate a larger packet for the response
				
				respPkt = m_sess.getPacketPool().allocatePacket( reqcnt + dataOff, smbPkt);
				
				// Switch to the response buffer
				
				buf = respPkt.getBuffer();
			}
			
			// Read from the file

			rdlen = disk.readFile(m_sess, conn, netFile, buf, respPkt.getByteOffset() + 3, reqcnt, reqoff);
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {

			// Debug

			if ( Debug.EnableError && m_sess.hasDebug(SMBSrvSession.DBG_FILEIO))
				m_sess.debugPrintln("File Read Error [" + netFile.getFileId() + "] : " + ex.toString());

			// Failed to read the file

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.HRDReadFault, SMBStatus.ErrHrd);
			return;
		}

		// Return the data block

		int bytOff = respPkt.getByteOffset();
		buf[bytOff] = (byte) DataType.DataBlock;
		DataPacker.putIntelShort(rdlen, buf, bytOff + 1);
		smbPkt.setByteCount(rdlen + 3); // data type + 16bit length

		smbPkt.setParameter(0, rdlen);
		smbPkt.setParameter(1, 0);
		smbPkt.setParameter(2, 0);
		smbPkt.setParameter(3, 0);
		smbPkt.setParameter(4, 0);

		// Send the read response

		m_sess.sendResponseSMB( respPkt);
	}

	/**
	 * Rename a file.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procRenameFile(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid rename file request

		if ( smbPkt.checkPacketIsValid(1, 4) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasWriteAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the data bytes position and length

		int dataPos = smbPkt.getByteOffset();
		int dataLen = smbPkt.getByteCount();
		byte[] buf  = smbPkt.getBuffer();

		// Extract the old file name

		boolean isUni = smbPkt.isUnicode();
		String oldName = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, isUni);
		if ( oldName == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Update the data position

		if ( isUni) {
			int len = (oldName.length() * 2) + 2;
			dataPos = DataPacker.wordAlign(dataPos + 1) + len;
			dataLen -= len;
		}
		else {
			dataPos += oldName.length() + 2; // string length + null + data type
			dataLen -= oldName.length() + 2;
		}

		// Extract the new file name

		String newName = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, isUni);
		if ( newName == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("File Rename [" + treeId + "] old name=" + oldName + ", new name=" + newName);

		// Access the disk interface and rename the requested file

		int fid;
		NetworkFile netFile = null;

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Rename the requested file

			disk.renameFile(m_sess, conn, oldName, newName);
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {

			// Failed to open the file

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSFileNotFound, SMBStatus.ErrDos);
			return;
		}

		// Build the rename file response

		smbPkt.setParameterCount(0);
		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Start/continue a directory search operation.
	 * 
	 * @param smbPkt Response SMB packet.
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected final void procSearch(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid search request

		if ( smbPkt.checkPacketIsValid(2, 5) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree connection details

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVInvalidTID, SMBStatus.ErrSrv);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasReadAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the maximum number of entries to return and the search file attributes

		int maxFiles = smbPkt.getParameter(0);
		int srchAttr = smbPkt.getParameter(1);

		// Check if this is a volume label request

		if ( (srchAttr & FileAttribute.Volume) != 0) {

			// Process the volume label request

			procSearchVolumeLabel(smbPkt);
			return;
		}

		// Get the data bytes position and length

		int dataPos = smbPkt.getByteOffset();
		int dataLen = smbPkt.getByteCount();
		byte[] buf  = smbPkt.getBuffer();

		// Extract the search file name

		String srchPath = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, smbPkt.isUnicode());

		if ( srchPath == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidFunc, SMBStatus.ErrDos);
			return;
		}

		// Update the received data position

		dataPos += srchPath.length() + 2;
		dataLen -= srchPath.length() + 2;

		int resumeLen = 0;

		if ( buf[dataPos++] == DataType.VariableBlock) {

			// Extract the resume key length

			resumeLen = DataPacker.getIntelShort(buf, dataPos);

			// Adjust remaining the data length and position

			dataLen -= 3; // block type + resume key length short
			dataPos += 2; // resume key length short

			// Check that we received enough data

			if ( resumeLen > dataLen) {
				m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
				return;
			}
		}

		// Access the shared devices disk interface

		SearchContext ctx = null;
		DiskInterface disk = null;

		try {
			disk = (DiskInterface) conn.getSharedDevice().getInterface();
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Check if this is the start of a new search

		byte[] resumeKey = null;
		int searchId = -1;

		// Default resume point is at the start of the directory, at the '.' directory if
		// directories are being returned.

		int resumeId = RESUME_START;

		if ( resumeLen == 0 && srchPath.length() > 0) {

			// Allocate a search slot for the new search

			searchId = vc.allocateSearchSlot();
			if ( searchId == -1) {

				// Try and find any 'leaked' searches, ie. searches that have been started but not
				// closed.
				//
				// Windows Explorer seems to leak searches after a new folder has been created, a
				// search for '????????.???' is started but never continued.

				int idx = 0;
				ctx = vc.getSearchContext(idx);

				while (ctx != null && searchId == -1) {

					// Check if the current search context looks like a leaked search.

					if ( ctx.getSearchString().compareTo("????????.???") == 0) {

						// Debug

						if ( Debug.EnableWarn && m_sess.hasDebug(SMBSrvSession.DBG_SEARCH))
							m_sess.debugPrintln("Release leaked search [" + idx + "]");

						// Deallocate the search context

						vc.deallocateSearchSlot(idx);

						// Allocate the slot for the new search

						searchId = vc.allocateSearchSlot();
					}
					else {

						// Update the search index and get the next search context

						ctx = vc.getSearchContext(++idx);
					}
				}

				// Check if we freed up a search slot

				if ( searchId == -1) {

					// Failed to allocate a slot for the new search

					m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVNoResourcesAvailable, SMBStatus.ErrSrv);
					return;
				}
			}

			// Debug

			if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_SEARCH))
				m_sess.debugPrintln("Start search [" + searchId + "] - " + srchPath + ", attr=0x" + Integer.toHexString(srchAttr)
						+ ", maxFiles=" + maxFiles);

			// Start a new search

			ctx = disk.startSearch(m_sess, conn, srchPath, srchAttr);
			if ( ctx != null) {

				// Store details of the search in the context

				ctx.setTreeId(treeId);
				ctx.setMaximumFiles(maxFiles);
			}

			// Save the search context

			vc.setSearchContext(searchId, ctx);
		}
		else {

			// Take a copy of the resume key

			resumeKey = new byte[CoreResumeKey.LENGTH];
			CoreResumeKey.getResumeKey(buf, dataPos, resumeKey);

			// Get the search context slot id from the resume key, and get the search context.

			int id = CoreResumeKey.getServerArea(resumeKey, 0);
			searchId = (id & 0xFFFF0000) >> 16;
			ctx = vc.getSearchContext(searchId);

			// Check if the search context is valid

			if ( ctx == null) {
				m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
				return;
			}

			// Get the resume id from the resume key

			resumeId = id & 0x0000FFFF;

			// Restart the search at the resume point, check if the resume point is already set, ie.
			// we are just continuing the search.

			if ( resumeId < RESUME_DOTDOT && ctx.getResumeId() != resumeId) {

				// Debug

				if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_SEARCH))
					m_sess.debugPrintln("Search resume at " + resumeId);

				// Restart the search at the specified point

				if ( ctx.restartAt(resumeId) == false) {

					// Debug

					if ( Debug.EnableError && m_sess.hasDebug(SMBSrvSession.DBG_SEARCH))
						m_sess.debugPrintln("Search restart failed");

					// Failed to restart the search

					m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSNoMoreFiles, SMBStatus.ErrDos);

					// Release the search context

					vc.deallocateSearchSlot(searchId);
					return;
				}
			}
		}

		// Check if the search context is valid

		if ( ctx == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Check that the search context and tree connection match

		if ( ctx.getTreeId() != treeId) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVInvalidTID, SMBStatus.ErrSrv);
			return;
		}

		// Check if this is a wildcard search
		
		boolean wildcardSearch = WildCard.containsWildcards( srchPath);
		
		// Calculate the response packet length required

		SMBSrvPacket respPkt = smbPkt;
		
		if ( wildcardSearch == true) {
			
			// Allocate a response packet large enough to hold the maximum requested file info records
			
			int pktSize = SMBSrvPacket.calculateHeaderLength( 1) + ( maxFiles * SearchInfoLen);
			respPkt = m_sess.getPacketPool().allocatePacket( pktSize, smbPkt);
			
			// Switch to using the new packet buffer
			
			buf = respPkt.getBuffer();
		}
		
		// Start building the search response packet

		respPkt.setParameterCount(1);
		int bufPos = respPkt.getByteOffset();
		buf[bufPos] = (byte) DataType.VariableBlock;
		bufPos += 3; // save two bytes for the actual block length
		int fileCnt = 0;

		// Check if this is the start of a wildcard search and includes directories

		if ( (srchAttr & FileAttribute.Directory) != 0 && resumeId >= RESUME_DOTDOT && wildcardSearch == true) {

			// The first entries in the search should be the '.' and '..' entries for the
			// current/parent directories.
			//
			// Remove the file name from the search path, and get the file information for the
			// search directory.

			String workDir = FileName.removeFileName(srchPath);
			FileInfo dirInfo = disk.getFileInformation(m_sess, conn, workDir);

			// Check if we have valid information for the working directory

			if ( dirInfo != null)
				dirInfo = new FileInfo(".", 0, FileAttribute.Directory);

			// Debug

			if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_SEARCH))
				m_sess.debugPrintln("Search adding . and .. entries:  " + dirInfo.toString());

			// Reset the file name to '.' and pack the directory information

			if ( resumeId == RESUME_START) {

				// Pack the '.' file information

				dirInfo.setFileName(".");
				resumeId = RESUME_DOT;
				bufPos = packSearchInfo(buf, bufPos, ctx.getSearchString(), RESUME_DOT, searchId, dirInfo);

				// Update the file count

				fileCnt++;
			}

			// Reset the file name to '..' and pack the directory information

			if ( resumeId == RESUME_DOT) {

				// Pack the '..' file information

				dirInfo.setFileName("..");
				bufPos = packSearchInfo(buf, bufPos, ctx.getSearchString(), RESUME_DOTDOT, searchId, dirInfo);

				// Update the file count

				fileCnt++;
			}
		}

		// Get files from the search and pack into the return packet

		FileInfo fileInfo = new FileInfo();

		while (fileCnt < ctx.getMaximumFiles() && ctx.nextFileInfo(fileInfo) == true) {

			// Check for . files, ignore them.
			//
			// ** Should check for . and .. file names **

			if ( fileInfo.getFileName().startsWith("."))
				continue;

			// Get the resume id for the current file/directory

			resumeId = ctx.getResumeId();

			// Debug

			if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_SEARCH))
				m_sess.debugPrintln("Search return file " + fileInfo.toString() + ", resumeId=" + resumeId);

			// Check if the share is read-only, if so then force the read-only flag for the file

			if ( conn.getSharedDevice().isReadOnly() && fileInfo.isReadOnly() == false) {

				// Make sure the read-only attribute is set

				fileInfo.setFileAttributes(fileInfo.getFileAttributes() + FileAttribute.ReadOnly);
			}

			// Pack the file information

			bufPos = packSearchInfo(buf, bufPos, ctx.getSearchString(), resumeId, searchId, fileInfo);

			// Update the file count, reset the current file information

			fileCnt++;
			fileInfo.resetInfo();
		}

		// Check if any files were found

		if ( fileCnt == 0) {

			// Send a repsonse that indicates that the search has finished

			respPkt.setParameterCount(1);
			respPkt.setParameter(0, 0);
			respPkt.setByteCount(0);

			respPkt.setErrorClass(SMBStatus.ErrDos);
			respPkt.setErrorCode(SMBStatus.DOSNoMoreFiles);

			m_sess.sendResponseSMB( respPkt);

			// Debug

			if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_SEARCH))
				m_sess.debugPrintln("End search [" + searchId + "]");

			// Release the search context

			vc.deallocateSearchSlot(searchId);
		}
		else {

			// Set the actual data length

			dataLen = bufPos - respPkt.getByteOffset();
			respPkt.setByteCount(dataLen);

			// Set the variable data block length and returned file count parameter

			bufPos = respPkt.getByteOffset() + 1;
			DataPacker.putIntelShort(dataLen - 3, buf, bufPos);
			respPkt.setParameter(0, fileCnt);

			// Send the search response packet

			m_sess.sendResponseSMB( respPkt);

			// Check if the search string contains wildcards and this is the start of a new search,
			// if not then
			// release the search context now as the client will not continue the search.

			if ( fileCnt == 1 && resumeLen == 0 && WildCard.containsWildcards(srchPath) == false) {

				// Debug

				if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_SEARCH))
					m_sess.debugPrintln("End search [" + searchId + "] (Not wildcard)");

				// Release the search context

				vc.deallocateSearchSlot(searchId);
			}
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_TXDATA))
			m_sess.debugPrintln("Tx " + respPkt.getLength() + " bytes");
	}

	/**
	 * Process a search request that is for the volume label.
	 * 
	 * @param smbPkt SMBSrvPacket
	 */
	protected final void procSearchVolumeLabel(SMBSrvPacket smbPkt)
		throws IOException, SMBSrvException {

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree connection details

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVInvalidTID, SMBStatus.ErrSrv);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasReadAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_SEARCH))
			m_sess.debugPrintln("Start Search - Volume Label");

		// Access the shared devices disk interface

		DiskInterface disk = null;
		DiskDeviceContext diskCtx = null;

		try {
			disk = (DiskInterface) conn.getSharedDevice().getInterface();
			diskCtx = (DiskDeviceContext) conn.getContext();
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Get the volume label

		VolumeInfo volInfo = diskCtx.getVolumeInformation();
		String volLabel = "";
		if ( volInfo != null)
			volLabel = volInfo.getVolumeLabel();

		// Start building the search response packet

		smbPkt.setParameterCount(1);
		int bufPos = smbPkt.getByteOffset();
		byte[] buf = smbPkt.getBuffer();
		buf[bufPos++] = (byte) DataType.VariableBlock;

		// Calculate the data length

		int dataLen = CoreResumeKey.LENGTH + 22;
		DataPacker.putIntelShort(dataLen, buf, bufPos);
		bufPos += 2;

		// Pack the resume key

		CoreResumeKey.putResumeKey(buf, bufPos, volLabel, -1);
		bufPos += CoreResumeKey.LENGTH;

		// Pack the file information

		buf[bufPos++] = (byte) (FileAttribute.Volume & 0x00FF);

		// Zero the date/time and file length fields

		for (int i = 0; i < 8; i++)
			buf[bufPos++] = (byte) 0;

		StringBuffer volBuf = new StringBuffer();
		volBuf.append(volLabel);

		while (volBuf.length() < 13)
			volBuf.append(" ");

		if ( volBuf.length() > 12)
			volBuf.setLength(12);

		bufPos = DataPacker.putString(volBuf.toString().toUpperCase(), buf, bufPos, true);

		// Set the actual data length

		dataLen = bufPos - smbPkt.getByteOffset();
		smbPkt.setByteCount(dataLen);

		// Send the search response packet

		m_sess.sendResponseSMB(smbPkt);

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_SEARCH))
			m_sess.debugPrintln("Volume label for " + conn.toString() + " is " + volLabel);
	}

	/**
	 * Seek to the specified file position within the open file.
	 * 
	 * @param smbPkt SMBSrvPacket
	 */
	protected final void procSeekFile(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid file seek request

		if ( smbPkt.checkPacketIsValid(4, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasReadAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the file id from the request

		int fid      = smbPkt.getParameter(0);
		int seekMode = smbPkt.getParameter(1);
		long seekPos = (long) smbPkt.getParameterLong(2);

		NetworkFile netFile = conn.findFile(fid);

		if ( netFile == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidHandle, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("File Seek [" + netFile.getFileId() + "] : Mode = " + seekMode + ", Pos = " + seekPos);

		// Seek to the specified position within the file

		byte[] buf = smbPkt.getBuffer();
		long pos = 0;

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Seek to the file position

			pos = disk.seekFile(m_sess, conn, netFile, seekPos, seekMode);
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (IOException ex) {

			// Debug

			if ( Debug.EnableError && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
				m_sess.debugPrintln("File Seek Error [" + netFile.getFileId() + "] : " + ex.toString());

			// Failed to seek the file

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.HRDReadFault, SMBStatus.ErrHrd);
			return;
		}

		// Return the new file position

		smbPkt.setParameterCount(2);
		smbPkt.setParameterLong(0, (int) (pos & 0x0FFFFFFFFL));
		smbPkt.setByteCount(0);

		// Send the seek response

		m_sess.sendResponseSMB( smbPkt);
	}

	/**
	 * Process the SMB session setup request.
	 * 
	 * @param smbPkt Response SMB packet.
	 */

	protected void procSessionSetup(SMBSrvPacket smbPkt)
		throws SMBSrvException, IOException, TooManyConnectionsException {

		// Return an access denied error, require a logon

		m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
	}

	/**
	 * Set the file attributes for a file.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procSetFileAttributes(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid set file attributes request

		if ( smbPkt.checkPacketIsValid(8, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasWriteAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the data bytes position and length

		int dataPos = smbPkt.getByteOffset();
		int dataLen = smbPkt.getByteCount();
		byte[] buf  = smbPkt.getBuffer();

		// Extract the file name

		String fileName = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, smbPkt.isUnicode());
		if ( fileName == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Get the file attributes

		int fattr = smbPkt.getParameter(0);
		int setFlags = FileInfo.SetAttributes;

		FileInfo finfo = new FileInfo(fileName, 0, fattr);

		int fdate = smbPkt.getParameter(1);
		int ftime = smbPkt.getParameter(2);

		if ( fdate != 0 && ftime != 0) {
			finfo.setModifyDateTime(new SMBDate(fdate, ftime).getTime());
			setFlags += FileInfo.SetModifyDate;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("Set File Attributes [" + treeId + "] name=" + fileName + ", attr=0x"
					+ Integer.toHexString(fattr) + ", fdate=" + fdate + ", ftime=" + ftime);

		// Access the disk interface and set the file attributes

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Get the file information for the specified file/directory

			finfo.setFileInformationFlags(setFlags);
			disk.setFileInformation(m_sess, conn, fileName, finfo);
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {
		}

		// Return the set file attributes response

		smbPkt.setParameterCount(0);
		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Set file information.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procSetFileInformation(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid set file information2 request

		if ( smbPkt.checkPacketIsValid(7, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasWriteAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the file id from the request, and get the network file details.

		int fid = smbPkt.getParameter(0);
		NetworkFile netFile = conn.findFile(fid);

		if ( netFile == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidHandle, SMBStatus.ErrDos);
			return;
		}

		// Get the creation date/time from the request

		int setFlags = 0;
		FileInfo finfo = new FileInfo(netFile.getName(), 0, 0);

		int fdate = smbPkt.getParameter(1);
		int ftime = smbPkt.getParameter(2);

		if ( fdate != 0 && ftime != 0) {
			finfo.setCreationDateTime(new SMBDate(fdate, ftime).getTime());
			setFlags += FileInfo.SetCreationDate;
		}

		// Get the last access date/time from the request

		fdate = smbPkt.getParameter(3);
		ftime = smbPkt.getParameter(4);

		if ( fdate != 0 && ftime != 0) {
			finfo.setAccessDateTime(new SMBDate(fdate, ftime).getTime());
			setFlags += FileInfo.SetAccessDate;
		}

		// Get the last write date/time from the request

		fdate = smbPkt.getParameter(5);
		ftime = smbPkt.getParameter(6);

		if ( fdate != 0 && ftime != 0) {
			finfo.setModifyDateTime(new SMBDate(fdate, ftime).getTime());
			setFlags += FileInfo.SetModifyDate;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILE))
			m_sess.debugPrintln("Set File Information 2 [" + netFile.getFileId() + "] " + finfo.toString());

		// Access the disk interface and set the file information

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Get the file information for the specified file/directory

			finfo.setFileInformationFlags(setFlags);
			disk.setFileInformation(m_sess, conn, netFile.getFullName(), finfo);
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {
		}

		// Return the set file information response

		smbPkt.setParameterCount(0);
		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Process the SMB tree connect request.
	 * 
	 * @param smbPkt Response SMB packet.
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 * @exception org.alfresco.aifs.smb.TooManyConnectionsException Too many concurrent connections
	 *                on this session.
	 */

	protected void procTreeConnect(SMBSrvPacket smbPkt)
		throws SMBSrvException, TooManyConnectionsException, java.io.IOException {

		// Check that the received packet looks like a valid tree connect request

		if ( smbPkt.checkPacketIsValid(0, 4) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the data bytes position and length

		int dataPos = smbPkt.getByteOffset();
		int dataLen = smbPkt.getByteCount();
		byte[] buf  = smbPkt.getBuffer();

		// Extract the requested share name, as a UNC path

		boolean isUni = smbPkt.isUnicode();
		String uncPath = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, isUni);
		if ( uncPath == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Extract the password string

		if ( isUni) {
			dataPos = DataPacker.wordAlign(dataPos + 1) + (uncPath.length() * 2) + 2;
			dataLen -= (uncPath.length() * 2) + 2;
		}
		else {
			dataPos += uncPath.length() + 2;
			dataLen -= uncPath.length() + 2;
		}

		String pwd = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, isUni);
		if ( pwd == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Extract the service type string

		if ( isUni) {
			dataPos = DataPacker.wordAlign(dataPos + 1) + (pwd.length() * 2) + 2;
			dataLen -= (pwd.length() * 2) + 2;
		}
		else {
			dataPos += pwd.length() + 2;
			dataLen -= pwd.length() + 2;
		}

		String service = DataPacker.getDataString(DataType.ASCII, buf, dataPos, dataLen, isUni);
		if ( service == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Convert the service type to a shared device type

		int servType = ShareType.ServiceAsType(service);
		if ( servType == ShareType.UNKNOWN) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_TREE))
			m_sess.debugPrintln("Tree connect - " + uncPath + ", " + service);

		// Parse the requested share name

		PCShare share = null;

		try {
			share = new PCShare(uncPath);
		}
		catch (InvalidUNCPathException ex) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		// Map the IPC$ share to the admin pipe type

		if ( servType == ShareType.NAMEDPIPE && share.getShareName().compareTo("IPC$") == 0)
			servType = ShareType.ADMINPIPE;

		// Find the requested shared device

		SharedDevice shareDev = null;

		try {

			// Get/create the shared device

			shareDev = m_sess.getSMBServer().findShare(share.getNodeName(), share.getShareName(), servType, getSession(), true);
		}
		catch (InvalidUserException ex) {

			// Return a logon failure status

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}
		catch (Exception ex) {

			// Return a general status, bad network name

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVInvalidNetworkName, SMBStatus.ErrSrv);
			return;
		}

		// Check if the share is valid

		if ( shareDev == null || shareDev.getType() != servType) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Allocate a tree id for the new connection

		int treeId = vc.addConnection(shareDev);

		// Authenticate the share connection depending upon the security mode the server is running
		// under

		ICifsAuthenticator auth = getSession().getSMBServer().getCifsAuthenticator();
		int filePerm = FileAccess.Writeable;

		if ( auth != null) {

			// Validate the share connection

			filePerm = auth.authenticateShareConnect(m_sess.getClientInformation(), shareDev, pwd, m_sess);
			if ( filePerm < 0) {

				// Invalid share connection request

				m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVNoAccessRights, SMBStatus.ErrSrv);
				return;
			}
		}

		// Set the file permission that this user has been granted for this share

		TreeConnection tree = vc.findConnection(treeId);
		tree.setPermission(filePerm);

		// Build the tree connect response

		smbPkt.setParameterCount(2);

		smbPkt.setParameter(0, buf.length - RFCNetBIOSProtocol.HEADER_LEN);
		smbPkt.setParameter(1, treeId);
		smbPkt.setByteCount(0);

		// Clear any chained request

		smbPkt.setAndXCommand(0xFF);
		m_sess.sendResponseSMB(smbPkt);

		// Inform the driver that a connection has been opened

		if ( tree.getInterface() != null)
			tree.getInterface().treeOpened(m_sess, tree);
	}

	/**
	 * Process the SMB tree disconnect request.
	 * 
	 * @param smbPkt Response SMB packet.
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procTreeDisconnect(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid tree disconnect request

		if ( smbPkt.checkPacketIsValid(0, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_TREE))
			m_sess.debugPrintln("Tree disconnect - " + treeId + ", " + conn.toString());

		// Remove the specified connection from the session

		vc.removeConnection(treeId, m_sess);

		// Check if this is the last tree connection on the virtual circuit and the virtual circuit is logged off
		
		if ( vc.getConnectionCount() == 0 && vc.isLoggedOn() == false) {
			
			// Remove the virtual circuit
			
			m_sess.removeVirtualCircuit( vc.getUID());
			
			// Debug

			if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_TREE))
				m_sess.debugPrintln("  Removed virtual circuit " + vc);
		}
			
		// Build the tree disconnect response

		smbPkt.setParameterCount(0);
		smbPkt.setByteCount(0);

		m_sess.sendResponseSMB(smbPkt);

		// If there are no active virtual circuits then close the session/socket
		
		if ( m_sess.numberOfVirtualCircuits() == 0) {
			
			// DEBUG
			
			if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_NEGOTIATE))
				Debug.println("  Closing session, no more virtual circuits");
			
			// Close the session/socket
			
			m_sess.hangupSession( "Tree disconnect");
		}

		// Inform the driver that a connection has been closed

		if ( conn.getInterface() != null)
			conn.getInterface().treeClosed(m_sess, conn);
	}

	/**
	 * Unlock a byte range in the specified file.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.server.SMBSrvException The exception description.
	 */
	protected void procUnLockFile(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid unlock file request

		if ( smbPkt.checkPacketIsValid(5, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasReadAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the file id from the request

		int fid      = smbPkt.getParameter(0);
		long lockcnt = smbPkt.getParameterLong(1);
		long lockoff = smbPkt.getParameterLong(3);

		NetworkFile netFile = conn.findFile(fid);

		if ( netFile == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidHandle, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILEIO))
			m_sess.debugPrintln("File UnLock [" + netFile.getFileId() + "] : Offset=" + lockoff + " ,Count=" + lockcnt);

		// ***** Always return a success status, simulated locking ****
		//
		// Build the unlock file response

		smbPkt.setParameterCount(0);
		smbPkt.setByteCount(0);

		// Send the response packet

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Unsupported SMB procesing.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected final void procUnsupported(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Send an unsupported error response

		m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVNotSupported, SMBStatus.ErrSrv);
	}

	/**
	 * Write to a file.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procWriteFile(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid file write request

		if ( smbPkt.checkPacketIsValid(5, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasWriteAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the file id from the request

		int fid     = smbPkt.getParameter(0);
		int wrtcnt  = smbPkt.getParameter(1);
		long wrtoff = smbPkt.getParameter(2) + ((smbPkt.getParameter(3) << 16) & 0xFFFFFFFFL);

		NetworkFile netFile = conn.findFile(fid);

		if ( netFile == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidHandle, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILEIO))
			m_sess.debugPrintln("File Write [" + netFile.getFileId() + "] : Size=" + wrtcnt + " ,Pos=" + wrtoff);

		// Write data to the file

		byte[] buf = smbPkt.getBuffer();
		int pos = smbPkt.getByteOffset();
		int wrtlen = 0;

		// Check that the data block is valid

		if ( buf[pos] != DataType.DataBlock) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Update the buffer position to the start of the data to be written

			pos += 3;

			// Check for a zero length write, this should truncate/extend the file to the write
			// offset position

			if ( wrtcnt == 0) {

				// Truncate/extend the file to the write offset

				disk.truncateFile(m_sess, conn, netFile, wrtoff);
			}
			else {

				// Write to the file

				wrtlen = disk.writeFile(m_sess, conn, netFile, buf, pos, wrtcnt, wrtoff);
			}
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {

			// Debug

			if ( Debug.EnableError && m_sess.hasDebug(SMBSrvSession.DBG_FILEIO))
				m_sess.debugPrintln("File Write Error [" + netFile.getFileId() + "] : " + ex.toString());

			// Failed to read the file

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.HRDWriteFault, SMBStatus.ErrHrd);
			return;
		}

		// Return the count of bytes actually written

		smbPkt.setParameterCount(1);
		smbPkt.setParameter(0, wrtlen);
		smbPkt.setByteCount(0);

		// Send the write response

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Write to a file then close the file.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @exception java.io.IOException The exception description.
	 * @exception org.alfresco.aifs.smb.SMBSrvException The exception description.
	 */
	protected void procWriteAndCloseFile(SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException {

		// Check that the received packet looks like a valid file write and close request

		if ( smbPkt.checkPacketIsValid(6, 0) == false) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.SRVUnrecognizedCommand, SMBStatus.ErrSrv);
			return;
		}

		// Get the virtual circuit for the request

		VirtualCircuit vc = m_sess.findVirtualCircuit( smbPkt.getUserId());
		if ( vc == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.SRVNonSpecificError, SMBStatus.ErrSrv);
			return;
		}

		// Get the tree id from the received packet and validate that it is a valid
		// connection id.

		int treeId = smbPkt.getTreeId();
		TreeConnection conn = vc.findConnection(treeId);

		if ( conn == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidDrive, SMBStatus.ErrDos);
			return;
		}

		// Check if the user has the required access permission

		if ( conn.hasWriteAccess() == false) {

			// User does not have the required access rights

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSAccessDenied, SMBStatus.ErrDos);
			return;
		}

		// Get the file id from the request

		int fid    = smbPkt.getParameter(0);
		int wrtcnt = smbPkt.getParameter(1);
		int wrtoff = smbPkt.getParameterLong(2);

		NetworkFile netFile = conn.findFile(fid);

		if ( netFile == null) {
			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidHandle, SMBStatus.ErrDos);
			return;
		}

		// Debug

		if ( Debug.EnableInfo && m_sess.hasDebug(SMBSrvSession.DBG_FILEIO))
			m_sess.debugPrintln("File Write And Close [" + netFile.getFileId() + "] : Size=" + wrtcnt + " ,Pos=" + wrtoff);

		// Write data to the file

		byte[] buf = smbPkt.getBuffer();
		int pos = smbPkt.getByteOffset() + 1; // word align
		int wrtlen = 0;

		try {

			// Access the disk interface that is associated with the shared device

			DiskInterface disk = (DiskInterface) conn.getSharedDevice().getInterface();

			// Write to the file

			wrtlen = disk.writeFile(m_sess, conn, netFile, buf, pos, wrtcnt, wrtoff);

			// Close the file
			//
			// The disk interface may be null if the file is a named pipe file

			if ( disk != null)
				disk.closeFile(m_sess, conn, netFile);

			// Indicate that the file has been closed

			netFile.setClosed(true);
		}
		catch (InvalidDeviceInterfaceException ex) {

			// Failed to get/initialize the disk interface

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.DOSInvalidData, SMBStatus.ErrDos);
			return;
		}
		catch (java.io.IOException ex) {

			// Debug

			if ( Debug.EnableError && m_sess.hasDebug(SMBSrvSession.DBG_FILEIO))
				m_sess.debugPrintln("File Write Error [" + netFile.getFileId() + "] : " + ex.toString());

			// Failed to read the file

			m_sess.sendErrorResponseSMB( smbPkt, SMBStatus.HRDWriteFault, SMBStatus.ErrHrd);
			return;
		}

		// Return the count of bytes actually written

		smbPkt.setParameterCount(1);
		smbPkt.setParameter(0, wrtlen);
		smbPkt.setByteCount(0);

		smbPkt.setError(0, 0);

		// Send the write response

		m_sess.sendResponseSMB(smbPkt);
	}

	/**
	 * Run the core SMB protocol handler.
	 * 
	 * @param smbPkt SMBSrvPacket
	 * @return boolean true if the packet was processed, else false
	 * @exception IOException
	 * @exception SMBSrvException
	 * @exception TooManyConnectionsException
	 */
	public boolean runProtocol( SMBSrvPacket smbPkt)
		throws java.io.IOException, SMBSrvException, TooManyConnectionsException {

		// Determine the SMB command type

		boolean handledOK = true;

		switch ( smbPkt.getCommand()) {

			// Session setup
	
			case PacketType.SessionSetupAndX:
				procSessionSetup( smbPkt);
				break;
	
			// Tree connect
	
			case PacketType.TreeConnect:
				procTreeConnect( smbPkt);
				break;
	
			// Tree disconnect
	
			case PacketType.TreeDisconnect:
				procTreeDisconnect( smbPkt);
				break;
	
			// Search
	
			case PacketType.Search:
				procSearch( smbPkt);
				break;
	
			// Get disk attributes
	
			case PacketType.DiskInformation:
				procDiskAttributes( smbPkt);
				break;
	
			// Get file attributes
	
			case PacketType.GetFileAttributes:
				procGetFileAttributes( smbPkt);
				break;
	
			// Set file attributes
	
			case PacketType.SetFileAttributes:
				procSetFileAttributes( smbPkt);
				break;
	
			// Get file information
	
			case PacketType.QueryInformation2:
				procGetFileInformation( smbPkt);
				break;
	
			// Set file information
	
			case PacketType.SetInformation2:
				procSetFileInformation( smbPkt);
				break;
	
			// Open a file
	
			case PacketType.OpenFile:
				procOpenFile( smbPkt);
				break;
	
			// Read from a file
	
			case PacketType.ReadFile:
				procReadFile( smbPkt);
				break;
	
			// Seek file
	
			case PacketType.SeekFile:
				procSeekFile( smbPkt);
				break;
	
			// Close a file
	
			case PacketType.CloseFile:
				procCloseFile( smbPkt);
				break;
	
			// Create a new file
	
			case PacketType.CreateFile:
			case PacketType.CreateNew:
				procCreateFile( smbPkt);
				break;
	
			// Write to a file
	
			case PacketType.WriteFile:
				procWriteFile( smbPkt);
				break;
	
			// Write to a file, then close the file
	
			case PacketType.WriteAndClose:
				procWriteAndCloseFile( smbPkt);
				break;
	
			// Flush file
	
			case PacketType.FlushFile:
				procFlushFile( smbPkt);
				break;
	
			// Rename a file
	
			case PacketType.RenameFile:
				procRenameFile( smbPkt);
				break;
	
			// Delete a file
	
			case PacketType.DeleteFile:
				procDeleteFile( smbPkt);
				break;
	
			// Create a new directory
	
			case PacketType.CreateDirectory:
				procCreateDirectory( smbPkt);
				break;
	
			// Delete a directory
	
			case PacketType.DeleteDirectory:
				procDeleteDirectory( smbPkt);
				break;
	
			// Check if a directory exists
	
			case PacketType.CheckDirectory:
				procCheckDirectory( smbPkt);
				break;
	
			// Unsupported requests
	
			case PacketType.IOCtl:
				procUnsupported( smbPkt);
				break;
	
			// Echo request
	
			case PacketType.Echo:
				procEcho( smbPkt);
				break;
	
			// Process exit request
	
			case PacketType.ProcessExit:
				procProcessExit( smbPkt);
				break;
	
			// Create temoporary file request
	
			case PacketType.CreateTemporary:
				procCreateTemporaryFile( smbPkt);
				break;
	
			// Lock file request
	
			case PacketType.LockFile:
				procLockFile( smbPkt);
				break;
	
			// Unlock file request
	
			case PacketType.UnLockFile:
				procUnLockFile( smbPkt);
				break;
	
			// Default
	
			default:
	
				// Indicate that the protocol handler did not process the SMB request
	
				if ( Debug.EnableError)
					Debug.println("<<<<< Unknown SMB type : 0x" + Integer.toHexString( smbPkt.getCommand()) + " >>>>>");
				handledOK = false;
				break;
		}

		// Return the handled status

		return handledOK;
	}
}