off = in.read(buf, 0, 1024);
        } else {
            off = in.readDirect(buf, 0, buf.length);
        }

        if (buf[0] != 5 && buf[1] != 0)
            throw new IOException("Unexpected DCERPC PDU header");

        flags = buf[3] & 0xFF;
        // next read is start of new frag
        isStart = (flags & DCERPC_LAST_FRAG) == DCERPC_LAST_FRAG;

        length = Encdec.dec_uint16le(buf, 8);

        }

        int off = this.handle.recv(buf, 0, buf.length);
        if ( buf[ 0 ] != 5 || buf[ 1 ] != 0 ) {
            throw new IOException("Unexpected DCERPC PDU header");
        }

        int length = Encdec.dec_uint16le(buf, 8);
        if ( length > getMaxRecv() ) {
            throw new IOException("Unexpected fragment length: " + length);
        }