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Java file server with SMB, FTP/FTPS and NFS support, virtual filesystems, database filesystems
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/*
 * Copyright (C) 2006-2010 Alfresco Software Limited.
 *
 * This file is part of Alfresco
 *
 * Alfresco is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Alfresco 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Alfresco. If not, see .
 */

package org.filesys.smb.mailslot;

import org.filesys.util.DataPacker;

/**
 * Mail slot constants class.
 *
 * @author gkspencer
 */
public final class MailSlot {

    //	Mail slot opcodes
    public static final int WRITE = 0x01;

    // Mail slot classes
    public static final int UNRELIABLE = 0x02;

    //	Mailslot \MAILSLOT\BROWSE opcodes
    public static final int HostAnnounce            = 1;
    public static final int AnnouncementRequest     = 2;
    public static final int RequestElection         = 8;
    public static final int GetBackupListReq        = 9;
    public static final int GetBackupListResp       = 10;
    public static final int BecomeBackup            = 11;
    public static final int DomainAnnouncement      = 12;
    public static final int MasterAnnouncement      = 13;
    public static final int LocalMasterAnnouncement = 15;

    /**
     * Create a host announcement mailslot structure
     *
     * @param buf      byte[]
     * @param off      int
     * @param host     String
     * @param comment  String
     * @param typ      int
     * @param interval int
     * @param upd      int
     * @return int
     */
    public final static int createHostAnnouncement(byte[] buf, int off, String host, String comment, int typ, int interval, int upd) {

        //  Set the command code and update count
        buf[off] = MailSlot.HostAnnounce;
        buf[off + 1] = 0;        // (byte) (upd & 0xFF);

        //  Set the announce interval, in minutes
        DataPacker.putIntelInt(interval * 60000, buf, off + 2);

        //  Pack the host name
        byte[] hostByt = host.getBytes();
        for (int i = 0; i < 16; i++) {
            if (i < hostByt.length)
                buf[off + 6 + i] = hostByt[i];
            else
                buf[off + 6 + i] = 0;
        }

        //  Major/minor version number
        buf[off + 22] = 5; // major version
        buf[off + 23] = 1; // minor version

        //  Set the server type flags
        DataPacker.putIntelInt(typ, buf, off + 24);

        //  Browser election version and  browser constant
        DataPacker.putIntelShort(0x010F, buf, off + 28);
        DataPacker.putIntelShort(0xAA55, buf, off + 30);

        //  Add the server comment string, or a null string
        int pos = off + 33;

        if (comment != null)
            pos = DataPacker.putString(comment, buf, off + 32, true);

        //	Return the end of data position
        return pos;
    }

    /**
     * Create an announcement request mailslot structure
     *
     * @param buf  byte[]
     * @param off  int
     * @param host String
     * @return int
     */
    public final static int createAnnouncementRequest(byte[] buf, int off, String host) {

        //  Set the command code
        buf[off] = MailSlot.AnnouncementRequest;
        buf[off + 1] = 0;

        //  Pack the host name
        byte[] hostByt = host.getBytes();
        for (int i = 0; i < 16; i++) {
            if (i < hostByt.length)
                buf[off + 2 + i] = hostByt[i];
            else
                buf[off + 2 + i] = 0;
        }

        //	Return the end of buffer position
        return off + 17;
    }
}