}
        throw new DcerpcException("DCERPC transport not supported: " + url);
    }

    public void bind() throws DcerpcException, IOException {
synchronized (this) {
        try {
            state = 1;
            DcerpcMessage bind = new DcerpcBind(binding, this);
            sendrecv(bind);
        } catch (IOException ioe) {
            state = 0;
            throw ioe;
        }
}
    }