650 	int thflags;  in tcp_input()  local
783 	thflags = th->th_flags;  in tcp_input()
793 	if (drop_synfin && (thflags & (TH_SYN | TH_FIN)) == (TH_SYN | TH_FIN))  in tcp_input()
895 				if (!(thflags & TH_SYN))  in tcp_input()
902 				    ntohs(th->th_sport), thflags);  in tcp_input()
911 				if (thflags & TH_SYN)  in tcp_input()
979 		if ((thflags & (TH_RST | TH_ACK | TH_SYN)) != TH_SYN) {  in tcp_input()
980 			if ((thflags & (TH_RST | TH_ACK | TH_SYN)) == TH_ACK) {  in tcp_input()
1021 			if (thflags & TH_RST) {  in tcp_input()
1025 			if (thflags & TH_ACK) {  in tcp_input()
1142 	if (!(thflags & TH_SYN))  in tcp_input()
1164 		tcp_timer_keep_activity(tp, thflags);  in tcp_input()
1170 	tcp_dooptions(&to, optp, optlen, (thflags & TH_SYN) != 0, th->th_ack);  in tcp_input()
1171 	if (tp->t_state == TCPS_SYN_SENT && (thflags & TH_SYN)) {  in tcp_input()
1217 	    (thflags & (TH_SYN|TH_FIN|TH_RST|TH_URG|TH_ACK)) == TH_ACK &&  in tcp_input()
1499 		if ((thflags & TH_ACK) &&  in tcp_input()
1520 		if ((thflags & TH_ACK) &&  in tcp_input()
1526 		if (thflags & TH_RST) {  in tcp_input()
1527 			if (thflags & TH_ACK)  in tcp_input()
1531 		if (!(thflags & TH_SYN))  in tcp_input()
1536 		if (thflags & TH_ACK) {  in tcp_input()
1567 				thflags &= ~TH_SYN;  in tcp_input()
1594 			thflags &= ~TH_FIN;  in tcp_input()
1607 		if (thflags & TH_ACK)  in tcp_input()
1681 	if (thflags & TH_RST) {  in tcp_input()
1718 	if ((thflags & TH_SYN) &&  in tcp_input()
1747 		    (thflags & (TH_SYN|TH_FIN|TH_RST|TH_URG|TH_ACK)) == TH_ACK&&  in tcp_input()
1806 			    th->th_seq + tlen, thflags);  in tcp_input()
1812 		if (thflags & TH_SYN) {  in tcp_input()
1813 			thflags &= ~TH_SYN;  in tcp_input()
1818 				thflags &= ~TH_URG;  in tcp_input()
1825 		    (todrop == tlen && !(thflags & TH_FIN))) {  in tcp_input()
1831 			thflags &= ~TH_FIN;  in tcp_input()
1851 			thflags &= ~TH_URG;  in tcp_input()
1894 		thflags &= ~(TH_PUSH | TH_FIN);  in tcp_input()
1917 					+ ((thflags & TH_SYN) != 0)  in tcp_input()
1918 					+ ((thflags & TH_FIN) != 0)))) {  in tcp_input()
1927 	if (thflags & TH_SYN) {  in tcp_input()
1938 	if (!(thflags & TH_ACK)) {  in tcp_input()
1979 		if (tlen == 0 && !(thflags & TH_FIN))  in tcp_input()
2006 			    ((thflags & TH_FIN) && !(tp->t_flags & TF_SAWFIN)))  in tcp_input()
2035 			if ((thflags & TH_FIN) && !(tp->t_flags & TF_QUEDFIN)) {  in tcp_input()
2328 	if ((thflags & TH_ACK) &&  in tcp_input()
2345 	if ((thflags & TH_URG) && th->th_urp &&  in tcp_input()
2355 			thflags &= ~TH_URG;		/* XXX */  in tcp_input()
2411 	if ((tlen || (thflags & TH_FIN)) && !TCPS_HAVERCVDFIN(tp->t_state)) {  in tcp_input()
2412 		if (thflags & TH_FIN)  in tcp_input()
2430 			if (thflags & TH_FIN)  in tcp_input()
2439 			thflags = th->th_flags & TH_FIN;  in tcp_input()
2456 				    th->th_seq + tlen, thflags);  in tcp_input()
2458 			thflags = tcp_reass(tp, th, &tlen, m);  in tcp_input()
2470 		thflags &= ~TH_FIN;  in tcp_input()
2477 	if (thflags & TH_FIN) {  in tcp_input()
2579 	if (tp->t_state == TCPS_SYN_RECEIVED && (thflags & TH_ACK) &&  in tcp_input()
2601 	if ((thflags & TH_RST) || m->m_flags & (M_BCAST | M_MCAST))  in tcp_input()
2628 	if (thflags & TH_ACK)  in tcp_input()
2633 		if (thflags & TH_SYN)  in tcp_input()
3396 tcp_timer_keep_activity(struct tcpcb *tp, int thflags)  in tcp_timer_keep_activity()  argument
3399 		if ((thflags & (TH_SYN | TH_ACK)) == TH_SYN) {  in tcp_timer_keep_activity()