package jcifs.smb1.util.transport;

import java.io.*;
import java.net.*;
import java.util.*;

import jcifs.smb1.util.LogStream;

/**
 * This class simplifies communication for protocols that support
 * multiplexing requests. It encapsulates a stream and some protocol
 * knowledge (provided by a concrete subclass) so that connecting,
 * disconnecting, sending, and receiving can be syncronized

            throws IOException {
        synchronized (PROTOCOL_HANDLERS) {
            URLStreamHandler handler = (URLStreamHandler)
                    PROTOCOL_HANDLERS.get(protocol);
            if (handler != null) return handler;
            if (factory != null) {
                handler = factory.createURLStreamHandler(protocol);
            }

=====

JCIFS is an Open Source client library that implements the CIFS/SMB networking protocol in 100% Java.
From version 2.x, this project is forked from [jcifs-ng](https://github.com/AgNO3/jcifs-ng) and existing jcifs code is merged as `smb1`.

## Version

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

import jcifs.RuntimeCIFSException;
import jcifs.smb.RequestParam;


/**
 * This class simplifies communication for protocols that support
 * multiplexing requests. It encapsulates a stream and some protocol
 * knowledge (provided by a concrete subclass) so that connecting,
 * disconnecting, sending, and receiving can be syncronized

                try {
                    URL url = getURL();
                    String protocol = url.getProtocol();
                    int port = url.getPort();
                    if (port == -1) {
                        port = "https".equalsIgnoreCase(protocol) ? 443 : 80;
                    }
                    PasswordAuthentication auth =

 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs;


/**
 * Utility class holding several protocol constrants
 * 
 * @author mbechler
 *
 * @internal
 */
@SuppressWarnings ( "javadoc" )
public interface SmbConstants {

    static final int DEFAULT_PORT = 445;

    private static URLStreamHandler getDefaultStreamHandler ( String protocol ) throws IOException {
        synchronized ( PROTOCOL_HANDLERS ) {
            URLStreamHandler handler = PROTOCOL_HANDLERS.get(protocol);
            if ( handler != null )
                return handler;
            if ( factory != null ) {
                handler = factory.createURLStreamHandler(protocol);
            }
            if ( handler == null ) {

        SingletonContext.getInstance();
        String pkgs = System.getProperty("java.protocol.handler.pkgs");
        if ( pkgs == null ) {
            System.setProperty("java.protocol.handler.pkgs", "jcifs");
        }
        else if ( pkgs.indexOf("jcifs") == -1 ) {
            pkgs += "|jcifs";
            System.setProperty("java.protocol.handler.pkgs", pkgs);
        }
    }


    /**
     * 
     */

    /**
     * This static method registers the SMB URL protocol handler which is
     * required to use SMB URLs with the <tt>java.net.URL</tt> class. If this
     * method is not called before attempting to create an SMB URL with the
     * URL class the following exception will occur:
     * <blockquote>
     * 
     * <pre>
     * Exception MalformedURLException: unknown protocol: smb
     *     at java.net.URL.&lt;init&gt;(URL.java:480)

 */
public interface SmbNegotiationResponse extends CommonServerMessageBlock, Response {

    /**
     * 
     * @param cifsContext
     * @param singingEnforced
     * @param request
     * @return whether the protocol negotiation was successful
     */
    boolean isValid ( CIFSContext cifsContext, SmbNegotiationRequest request );


    /**
     * 
     * @return selected dialect
     */