@Override
    protected void doSend ( Request request ) throws IOException {

        CommonServerMessageBlock smb = (CommonServerMessageBlock) request;
        byte[] buffer = this.getContext().getBufferCache().getBuffer();
        try {
            // synchronize around encode and write so that the ordering for SMB1 signing can be maintained
            synchronized ( this.outLock ) {
                int n = smb.encode(buffer, 4);