* This class provides common functionality for session layer communication.
 */
public abstract class SessionServicePacket {

    /**
     * Default constructor for SessionServicePacket.
     * Creates a new session service packet instance.
     */
    public SessionServicePacket() {
        // Default constructor
    }

    // session service packet types
    static final int SESSION_MESSAGE = 0x00;

 * This class provides common functionality for session layer communication in SMB1.
 */
public abstract class SessionServicePacket {

    /**
     * Default constructor for SessionServicePacket.
     * Creates a new session service packet instance.
     */
    public SessionServicePacket() {
        // Default constructor
    }

    // session service packet types
    static final int SESSION_MESSAGE = 0x00;

    void testConstants() {
        assertEquals(0x00, SessionServicePacket.SESSION_MESSAGE);
        assertEquals(0x81, SessionServicePacket.SESSION_REQUEST);
        assertEquals(0x82, SessionServicePacket.POSITIVE_SESSION_RESPONSE);
        assertEquals(0x83, SessionServicePacket.NEGATIVE_SESSION_RESPONSE);
        assertEquals(0x84, SessionServicePacket.SESSION_RETARGET_RESPONSE);

                    return tot;
                }
            }

            switch (SessionServicePacket.readPacketType(in, header, 0)) {
            case SessionServicePacket.SESSION_KEEP_ALIVE:
                break;
            case SessionServicePacket.SESSION_MESSAGE:
                bip = SessionServicePacket.readLength(header, 0);
                break;
            case -1:
                if (tot > 0) {

            final OutputStream out = super.getOutputStream();

            final SessionServicePacket ssp0 = new SessionRequestPacket(calledName, NbtAddress.localhost.hostName);
            out.write(buffer, 0, ssp0.writeWireFormat(buffer, 0));

            setSoTimeout(soTimeout);
            type = SessionServicePacket.readPacketType(in, buffer, 0);
        } catch (final IOException ioe) {
            close();

 */

package jcifs.smb1.netbios;

import java.io.IOException;
import java.io.InputStream;

class SessionRetargetResponsePacket extends SessionServicePacket {

    private NbtAddress retargetAddress;

    SessionRetargetResponsePacket() {
        type = SESSION_RETARGET_RESPONSE;
        length = 6;
    }

    @Override

     * - Byte 1: High bit of 17-bit length field
     * - Bytes 2-3: Lower 16 bits of length field
     */
    private static byte[] messageHeader(int length) {
        byte[] h = new byte[4];
        h[0] = (byte) SessionServicePacket.SESSION_MESSAGE;
        h[1] = (byte) ((length >> 16) & 0x01);
        h[2] = (byte) ((length >> 8) & 0xFF);
        h[3] = (byte) (length & 0xFF);
        return h;
    }

    /**

import java.io.InputStream;

/**
 * NetBIOS session request packet for establishing sessions.
 * This packet is sent to request a NetBIOS session with a remote host.
 */
public class SessionRequestPacket extends SessionServicePacket {

    private final Name calledName, callingName;

    SessionRequestPacket() {
        calledName = new Name();
        callingName = new Name();
    }

    /**

        }
        if (off < 4) {
            throw new IOException("NetBIOS socket output buffer requires 4 bytes available before off");
        }

        off -= 4;

        b[off + 0] = (byte) SessionServicePacket.SESSION_MESSAGE;
        b[off + 1] = (byte) 0x00;
        b[off + 2] = (byte) (len >> 8 & 0xFF);
        b[off + 3] = (byte) (len & 0xFF);

        out.write(b, off, 4 + len);
    }

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.netbios;

import java.io.IOException;
import java.io.InputStream;

class SessionRetargetResponsePacket extends SessionServicePacket {

    SessionRetargetResponsePacket() {
        this.type = SESSION_RETARGET_RESPONSE;
        this.length = 6;
    }

    @Override
    int writeTrailerWireFormat(final byte[] dst, final int dstIndex) {