new ValidateNegotiateInfoRequest(
                negoReq.getCapabilities(),
                negoReq.getClientGuid(),
                (short) negoReq.getSecurityMode(),
                negoReq.getDialects()));

        Smb2IoctlResponse resp;
        try {
            resp = send(req, RequestParam.NO_RETRY);
        }
        catch ( SMBSignatureValidationException e ) {

        DialectVersion selected = null;
        for ( DialectVersion dv : DialectVersion.values() ) {
            if ( !dv.isSMB2() ) {
                continue;
            }
            if ( dv.getDialect() == getDialectRevision() ) {
                selected = dv;
            }
        }

        if ( selected == null ) {
            log.error("Server returned an unknown dialect");
            return false;