285 static inline int tcp_stretch_ack_enable(struct tcpcb *tp, int thflags);
1246 tcp_stretch_ack_enable(struct tcpcb *tp, int thflags)  in tcp_stretch_ack_enable()  argument
1264 	if (thflags & ~TH_ACK) {  in tcp_stretch_ack_enable()
1721 tcp_update_window(struct tcpcb *tp, int thflags, struct tcphdr * th,  in tcp_update_window()  argument
1725 	if ((thflags & TH_ACK) &&  in tcp_update_window()
2025 	int thflags;  in tcp_input()  local
2223 	thflags = th->th_flags;  in tcp_input()
2231 	if ((thflags & (TH_SYN | TH_FIN)) == (TH_SYN | TH_FIN)) {  in tcp_input()
2323 				if (thflags & TH_SYN) {  in tcp_input()
2335 				    ntohs(th->th_sport), thflags);  in tcp_input()
2339 				if ((thflags & TH_SYN) && !(thflags & TH_ACK) &&  in tcp_input()
2358 					if (thflags & TH_SYN) {  in tcp_input()
2498 	if ((thflags & TH_ACCEPT) == 0) {  in tcp_input()
2507 	if ((thflags & TH_SYN) == 0) {  in tcp_input()
2561 			if ((thflags & (TH_RST | TH_ACK | TH_SYN)) != TH_SYN) {  in tcp_input()
2564 				if (thflags & TH_RST) {  in tcp_input()
2566 					    thflags & TH_SYN ? "ignore SYN with RST" : "ignore RST");  in tcp_input()
2569 				if (thflags & TH_ACK) {  in tcp_input()
2571 					    thflags & TH_SYN ? "bad SYN with ACK" : "bad ACK");  in tcp_input()
2902 		    th->th_seq, th->th_ack, tlen, thflags,  in tcp_input()
2916 		if (tcp_stretch_ack_enable(tp, thflags)) {  in tcp_input()
2960 		if (thflags & TH_CWR) {  in tcp_input()
3016 	    (ip_ecn == IPTOS_ECN_CE || (thflags & TH_CWR))) {  in tcp_input()
3073 	if (tp->t_state == TCPS_SYN_SENT && (thflags & TH_SYN)) {  in tcp_input()
3074 		if (!(thflags & TH_ACK) ||  in tcp_input()
3094 	    (thflags & (TH_SYN | TH_FIN | TH_RST | TH_URG | TH_ACK | TH_ECE | TH_PUSH)) == TH_ACK &&  in tcp_input()
3165 	    (thflags & TH_FLAGS) == TH_ACK &&  in tcp_input()
3622 		int ace_flags = ((th->th_x2 << 8) | thflags) & TH_ACE;  in tcp_input()
3640 		if ((thflags & TH_ACK) &&  in tcp_input()
3654 		if ((thflags & TH_SYN) &&  in tcp_input()
3674 		if ((thflags & TH_ACK) &&  in tcp_input()
3681 		if (thflags & TH_RST) {  in tcp_input()
3682 			if ((thflags & TH_ACK) != 0) {  in tcp_input()
3711 		if ((thflags & TH_SYN) == 0) {  in tcp_input()
3720 		if (thflags & TH_ACK) {  in tcp_input()
3724 			const uint32_t ace_flags = ((th->th_x2 << 8) | thflags) & TH_ACE;  in tcp_input()
3726 			if ((thflags & (TH_ECE | TH_CWR)) == (TH_ECE)) {  in tcp_input()
3961 				thflags &= ~TH_SYN;  in tcp_input()
4048 			thflags &= ~TH_FIN;  in tcp_input()
4061 		if (thflags & TH_ACK) {  in tcp_input()
4086 		if (thflags & TH_SYN && tlen <= 0) {  in tcp_input()
4177 	if (thflags & TH_RST) {  in tcp_input()
4319 		if (thflags & TH_SYN) {  in tcp_input()
4321 			thflags &= ~TH_SYN;  in tcp_input()
4326 				thflags &= ~TH_URG;  in tcp_input()
4336 		    || (todrop == tlen && (thflags & TH_FIN) == 0)) {  in tcp_input()
4342 			thflags &= ~TH_FIN;  in tcp_input()
4396 			thflags &= ~TH_URG;  in tcp_input()
4458 			if (thflags & TH_SYN &&  in tcp_input()
4484 		thflags &= ~(TH_PUSH | TH_FIN);  in tcp_input()
4508 	    ((thflags & (TH_SYN | TH_FIN)) != 0))) {  in tcp_input()
4521 	if (thflags & TH_SYN) {  in tcp_input()
4540 			thflags &= ~TH_SYN;  in tcp_input()
4549 	if ((thflags & TH_ACK) == 0) {  in tcp_input()
4576 			int ace_flags = ((th->th_x2 << 8) | thflags) & TH_ACE;  in tcp_input()
4657 		if (TCP_ACC_ECN_ON(tp) && (thflags & (TH_SYN | TH_ACK)) == TH_ACK) {  in tcp_input()
4658 			const uint32_t ace_flags = ((th->th_x2 << 8) | thflags) & TH_ACE;  in tcp_input()
4938 				if ((thflags & TH_FIN) &&  in tcp_input()
5078 						tcp_update_window(tp, thflags,  in tcp_input()
5176 							tcp_update_window(tp, thflags, th, tiwin, tlen);  in tcp_input()
5191 						tcp_update_window(tp, thflags, th, tiwin, tlen);  in tcp_input()
5381 			if (TCP_ACC_ECN_ON(tp) && !(thflags & TH_SYN)) {  in tcp_input()
5413 			} else if (TCP_ECN_ENABLED(tp) && (thflags & TH_ECE)) {  in tcp_input()
5626 	if (tcp_update_window(tp, thflags, th, tiwin, tlen)) {  in tcp_input()
5633 	if ((thflags & TH_URG) && th->th_urp &&  in tcp_input()
5643 			thflags &= ~TH_URG;             /* XXX */  in tcp_input()
5726 	if ((tlen || (thflags & TH_FIN)) &&  in tcp_input()
5771 			thflags = th->th_flags & TH_FIN;  in tcp_input()
5840 			thflags = tcp_reass(tp, th, &tlen, m, ifp, &read_wakeup);  in tcp_input()
5884 		thflags &= ~TH_FIN;  in tcp_input()
5912 	if (thflags & TH_FIN) {  in tcp_input()
6017 	if (tp->t_state == TCPS_SYN_RECEIVED && (thflags & TH_ACK) &&  in tcp_input()
6042 	if ((thflags & TH_RST) || m->m_flags & (M_BCAST | M_MCAST)) {  in tcp_input()
6063 	if (thflags & TH_ACK) {  in tcp_input()
6068 		if (thflags & TH_SYN) {  in tcp_input()