bsd/netinet/tcp_input.c

491 	bw_meas_bytes = tp->snd_una - tp->t_bwmeas->bw_start;
2255 			if (SEQ_GT(th->th_ack, tp->snd_una) &&
2303 				acked = th->th_ack - tp->snd_una;
2309 				 * assume that snd_una is not updated yet.
2321 				if (SEQ_GT(tp->snd_una, tp->snd_recover) &&
2324 				tp->snd_una = th->th_ack;
2344 				if (tp->snd_una == tp->snd_max)
2362 		} else if (th->th_ack == tp->snd_una &&
2489 	 * Also initialize tp->snd_nxt to tp->iss+1 and tp->snd_una to tp->iss.
2563 		tp->snd_recover = tp->snd_una;
2606 		    (SEQ_LEQ(th->th_ack, tp->snd_una) ||
2624 	 *	if seg contains ack then advance tp->snd_una
2680 			tp->snd_una++;		/* SYN is acked */
3185 	 *	tp->snd_una < th->th_ack <= tp->snd_max
3186 	 * then advance tp->snd_una to th->th_ack and drop
3204 		if (SEQ_LEQ(th->th_ack, tp->snd_una)) {
3232 				    th->th_ack != tp->snd_una)
3368 			 * increment snd_una for ACK of SYN, and check if
3372 			tp->snd_una++;
3382 		acked = th->th_ack - tp->snd_una;
3472 		 * The calculations in this function assume that snd_una is
3495 		    SEQ_GT(tp->snd_una, tp->snd_recover) &&
3503 		tp->snd_una = th->th_ack;
3505 			if (SEQ_GT(tp->snd_una, tp->snd_recover))
3506 				tp->snd_recover = tp->snd_una;
3508 		if (SEQ_LT(tp->snd_nxt, tp->snd_una))
3509 			tp->snd_nxt = tp->snd_una;
3515 		 * sowwakeup must happen after snd_una, et al. are updated so that
3907 	    (SEQ_GT(tp->snd_una, th->th_ack) ||
4641 		 * (tp->snd_una has not yet been updated when this function
4644 		tp->snd_cwnd = tp->t_maxseg + (th->th_ack - tp->snd_una);
4651 		 * Partial window deflation.  Relies on fact that tp->snd_una
4654 		if (tp->snd_cwnd > th->th_ack - tp->snd_una)
4655 			tp->snd_cwnd -= th->th_ack - tp->snd_una;