bsd/netinet/tcp_output.c

317 	idle = (tp->t_flags & TF_LASTIDLE) || (tp->snd_max == tp->snd_una);
477 	 * If we've recently taken a timeout, snd_max will be greater than
481 	if (SACK_ENABLED(tp) && SEQ_LT(tp->snd_nxt, tp->snd_max))
601 	 * If snd_nxt == snd_max and we have transmitted a FIN, the
606 	 * to snd_max after the fast-retransmit.
898 		if (SEQ_LT(tp->snd_nxt, tp->snd_max))
1005 	    SEQ_GT(tp->snd_max, tp->snd_una) &&
1197 		!SEQ_LT(tp->snd_nxt, tp->snd_max) && !sack_rxmit) {
1416 		(so->so_snd.sb_cc - (tp->snd_max - tp->snd_una)) >=
1418 		tp->t_bwmeas->bw_size = min((so->so_snd.sb_cc - (tp->snd_max - tp->snd_una)),
1421 		tp->t_bwmeas->bw_start = tp->snd_max;
1434 		else if (SEQ_LT(tp->snd_nxt, tp->snd_max) || sack_rxmit) {
1632 			!SEQ_LT(tp->snd_nxt, tp->snd_max) && !sack_rxmit) {
1645 			!SEQ_LT(tp->snd_nxt, tp->snd_max) && !sack_rxmit) {
1656 	    tp->snd_nxt == tp->snd_max)
1664 	 * (and no SYN or FIN), use snd_max instead of snd_nxt
1666 	 * state, snd_max might reflect one byte beyond the
1675 			th->th_seq = htonl(tp->snd_max);
1793 	 * the retransmit.  In persist state, just set snd_max.
1813 		if (SEQ_GT(tp->snd_nxt, tp->snd_max)) {
1814 			tp->snd_max = tp->snd_nxt;
1836 		    ((sack_rxmit && tp->snd_nxt != tp->snd_max) ||
1849 		 * Persist case, update snd_max but since we are in
1860 		if (SEQ_GT(tp->snd_nxt + xlen, tp->snd_max))
1861 			tp->snd_max = tp->snd_nxt + len;
1964 		    th->th_flags == TH_ACK && tp->snd_una == tp->snd_max &&