286 static inline int tcp_stretch_ack_enable(struct tcpcb *tp, int thflags);
1297 tcp_stretch_ack_enable(struct tcpcb *tp, int thflags)  in tcp_stretch_ack_enable()  argument
1315 	if (thflags & ~TH_ACK) {  in tcp_stretch_ack_enable()
1771 tcp_update_window(struct tcpcb *tp, int thflags, struct tcphdr * th,  in tcp_update_window()  argument
1775 	if ((thflags & TH_ACK) &&  in tcp_update_window()
1881 	int thflags;  in tcp_input()  local
2079 	thflags = th->th_flags;  in tcp_input()
2087 	if ((thflags & (TH_SYN | TH_FIN)) == (TH_SYN | TH_FIN)) {  in tcp_input()
2178 				if (thflags & TH_SYN) {  in tcp_input()
2190 				    ntohs(th->th_sport), thflags);  in tcp_input()
2194 				if ((thflags & TH_SYN) && !(thflags & TH_ACK) &&  in tcp_input()
2213 					if (thflags & TH_SYN) {  in tcp_input()
2353 	if ((thflags & TH_ACCEPT) == 0) {  in tcp_input()
2359 	if ((thflags & TH_SYN) == 0) {  in tcp_input()
2423 			if ((thflags & (TH_RST | TH_ACK | TH_SYN)) != TH_SYN) {  in tcp_input()
2426 				if (thflags & TH_RST) {  in tcp_input()
2428 					    thflags & TH_SYN ? "ignore SYN with RST" : "ignore RST");  in tcp_input()
2431 				if (thflags & TH_ACK) {  in tcp_input()
2433 					    thflags & TH_SYN ? "bad SYN with ACK" : "bad ACK");  in tcp_input()
2759 		    th->th_seq, th->th_ack, tlen, thflags,  in tcp_input()
2773 		if (tcp_stretch_ack_enable(tp, thflags)) {  in tcp_input()
2796 		if (thflags & TH_CWR) {  in tcp_input()
2858 	    (ip_ecn == IPTOS_ECN_CE || (thflags & TH_CWR))) {  in tcp_input()
2915 	if (tp->t_state == TCPS_SYN_SENT && (thflags & TH_SYN)) {  in tcp_input()
2916 		if (!(thflags & TH_ACK) ||  in tcp_input()
2936 	    (thflags & (TH_SYN | TH_FIN | TH_RST | TH_URG | TH_ACK | TH_ECE | TH_PUSH)) == TH_ACK &&  in tcp_input()
3007 	    (thflags & TH_FLAGS) == TH_ACK &&  in tcp_input()
3405 		int ace_flags = ((th->th_x2 << 8) | thflags) & TH_ACE;  in tcp_input()
3485 		if ((thflags & TH_ACK) &&  in tcp_input()
3499 		if ((thflags & TH_SYN) &&  in tcp_input()
3510 		if (TCP_ACC_ECN_ON(tp) && (thflags & (TH_SYN | TH_ACK)) == TH_ACK) {  in tcp_input()
3511 			const uint32_t ace_flags = ((th->th_x2 << 8) | thflags) & TH_ACE;  in tcp_input()
3565 		if ((thflags & TH_ACK) &&  in tcp_input()
3572 		if (thflags & TH_RST) {  in tcp_input()
3573 			if ((thflags & TH_ACK) != 0) {  in tcp_input()
3600 		if ((thflags & TH_SYN) == 0) {  in tcp_input()
3609 		if (thflags & TH_ACK) {  in tcp_input()
3613 			const uint32_t ace_flags = ((th->th_x2 << 8) | thflags) & TH_ACE;  in tcp_input()
3615 			if ((thflags & (TH_ECE | TH_CWR)) == (TH_ECE)) {  in tcp_input()
3814 				thflags &= ~TH_SYN;  in tcp_input()
3901 			thflags &= ~TH_FIN;  in tcp_input()
3914 		if (thflags & TH_ACK) {  in tcp_input()
3936 		if (thflags & TH_SYN && tlen <= 0) {  in tcp_input()
4024 	if (thflags & TH_RST) {  in tcp_input()
4166 		if (thflags & TH_SYN) {  in tcp_input()
4168 			thflags &= ~TH_SYN;  in tcp_input()
4173 				thflags &= ~TH_URG;  in tcp_input()
4183 		    || (todrop == tlen && (thflags & TH_FIN) == 0)) {  in tcp_input()
4189 			thflags &= ~TH_FIN;  in tcp_input()
4243 			thflags &= ~TH_URG;  in tcp_input()
4305 			if (thflags & TH_SYN &&  in tcp_input()
4331 		thflags &= ~(TH_PUSH | TH_FIN);  in tcp_input()
4355 	    ((thflags & (TH_SYN | TH_FIN)) != 0))) {  in tcp_input()
4368 	if (thflags & TH_SYN) {  in tcp_input()
4387 			thflags &= ~TH_SYN;  in tcp_input()
4396 	if ((thflags & TH_ACK) == 0) {  in tcp_input()
4656 				if ((thflags & TH_FIN) &&  in tcp_input()
4830 						tcp_update_window(tp, thflags,  in tcp_input()
4923 							tcp_update_window(tp, thflags, th, tiwin, tlen);  in tcp_input()
4935 						tcp_update_window(tp, thflags, th, tiwin, tlen);  in tcp_input()
5109 			} else if (TCP_ECN_ENABLED(tp) && (thflags & TH_ECE)) {  in tcp_input()
5296 	if (tcp_update_window(tp, thflags, th, tiwin, tlen)) {  in tcp_input()
5303 	if ((thflags & TH_URG) && th->th_urp &&  in tcp_input()
5313 			thflags &= ~TH_URG;             /* XXX */  in tcp_input()
5396 	if ((tlen || (thflags & TH_FIN)) &&  in tcp_input()
5441 			thflags = th->th_flags & TH_FIN;  in tcp_input()
5510 			thflags = tcp_reass(tp, th, &tlen, m, ifp, &read_wakeup);  in tcp_input()
5554 		thflags &= ~TH_FIN;  in tcp_input()
5561 	if (thflags & TH_FIN) {  in tcp_input()
5673 	if (tp->t_state == TCPS_SYN_RECEIVED && (thflags & TH_ACK) &&  in tcp_input()
5704 	if ((thflags & TH_RST) || m->m_flags & (M_BCAST | M_MCAST)) {  in tcp_input()
5731 	if (thflags & TH_ACK) {  in tcp_input()
5736 		if (thflags & TH_SYN) {  in tcp_input()