if (r.byteCount > 0 && pad > 0 && pad < 4) {
                    readn(in, BUF, 4 + off, pad);
                }

                if (r.dataLength > 0) {
                    readn(in, r.b, r.off, r.dataLength); /* read direct */
                }
            } else {
                readn(in, BUF, 4 + 32, size - 32);
                resp.decode(BUF, 4);

                        }
                        if (resp.dataLength <= 0) {
                            break;
                        }
                        w.write(b[i], resp.dataLength, dest, off);
                    }

                    i = i == 1 ? 0 : 1;
                    off += resp.dataLength;
                }