* @throws DcerpcException
     * @throws NdrException
     */
    private byte[] receiveMoreFragments ( DcerpcMessage msg, byte[] in ) throws IOException, DcerpcException, NdrException {
        int off = msg.ptype == 2 ? msg.length : 24;
        byte[] fragBytes = new byte[this.max_recv];
        NdrBuffer fragBuf = new NdrBuffer(fragBytes, 0);
        while ( !msg.isFlagSet(DCERPC_LAST_FRAG) ) {

            if (securityProvider != null)
                securityProvider.unwrap(buf);

            buf.setIndex(0);

            msg.decode_header(buf);

            off = 24;
            if (msg.ptype == 2 && msg.isFlagSet(DCERPC_LAST_FRAG) == false)
                off = msg.length;

            frag = null;
            fbuf = null;
            while (msg.isFlagSet(DCERPC_LAST_FRAG) == false) {