else if ( compound && this.nextCommand == 0 && this.readSize > 0 ) {
            // TODO: only apply this for actual compound chains, or is this correct for single responses, too?
            // 3.2.5.1.9 Handling Compounded Responses
            // The final response in the compounded response chain will have NextCommand equal to 0,
            // and it MUST be processed as an individual message of a size equal to the number of bytes

                    Response response,
                    long timeout ) throws IOException {
            makeKey( request );
            response.isReceived = false;
            try {
                response_map.put( request, response );
                doSend( request );
                response.expiration = System.currentTimeMillis() + timeout;
                while (!response.isReceived) {

    }


    /**
     * 
     * {@inheritDoc}
     *
     * @see jcifs.util.transport.Response#verifySignature(byte[], int, int)
     */
    @Override
    public boolean verifySignature ( byte[] buffer, int i, int size ) {
        // observed too that signatures on error responses are sometimes wrong??
        // Looks like the failure case also is just reflecting back the signature we sent

    }


    /**
     * @param response
     *            the response to set
     */
    @Override
    public final void setResponse ( CommonServerMessageBlockResponse response ) {
        if ( ! ( response instanceof ServerMessageBlock ) ) {
            throw new IllegalArgumentException();
        }
        this.response = (ServerMessageBlock) response;
    }


    /**
     * {@inheritDoc}

     * and well as their responses for each type however the actuall implementations
     * of the readXxxWireFormat and writeXxxWireFormat methods may not be in
     * place. For example at the time of this writing the readXxxWireFormat
     * for requests and the writeXxxWireFormat for responses are not implemented
     * and simply return 0. These would need to be completed for a server

                            for ( Response response : this.response_map.values() ) {
                                response.error();
                            }
                        }
                        throw new IOException("end of stream");
                    }

                    Response response = this.response_map.get(key);
                    if ( response == null ) {

     * 
     * This does not provide any actual downgrade protection if SMB1 is allowed.
     * 
     * It will also break connections with SMB2 servers that do not properly sign error responses.
     * 
     * @return whether to enforce the use of secure negotiation.
     */
    boolean isRequireSecureNegotiate ();


    /**
     * Enable port 139 failover
     * 

                ioe2.printStackTrace( log );
            }
            throw ioe;
        }
    }

    protected void doRecv( Response response ) throws IOException {
        ServerMessageBlock resp = (ServerMessageBlock)response;
        resp.useUnicode = useUnicode;
        resp.extendedSecurity = (capabilities & CAP_EXTENDED_SECURITY) == CAP_EXTENDED_SECURITY;

        synchronized (BUF) {

package jcifs.smb1.util.transport;

public abstract class Response {
    public long expiration;
    public boolean isReceived;

    request.desiredAccess |= 0x20000;
    response.isExtended = true;
}
            send( request, response );
            f = response.fid;
            attributes = response.extFileAttributes & ATTR_GET_MASK;
            attrExpiration = System.currentTimeMillis() + attrExpirationPeriod;
            isExists = true;
        } else {
            SmbComOpenAndXResponse response = new SmbComOpenAndXResponse();