+ /*
+ * If this is a small packet, then ACK now - with Nagel
+ * congestion avoidance sender won't send more until
+ * he gets an ACK.
+ */
+ if ((unsigned)ti->ti_len < tp->t_maxseg) {
+ tp->t_flags |= TF_ACKNOW;
+ tcp_output(tp);
+ } else {
+ tp->t_flags |= TF_DELACK;
+ }