PFF
*new_frame->b_wptr++ = PFF |
*mp->b_rptr = PFF | (len);
*state->sa_mqtail->b_wptr++ = PFF |len;
*new_frame->b_wptr++ = PFF | (len);
if (!(mp->b_rptr[0] & PFF)) {
len = muxhdr & ~PFF;
if (muxhdr & PFF) {