279 static inline int tcp_stretch_ack_enable(struct tcpcb *tp, int thflags);
1298 tcp_stretch_ack_enable(struct tcpcb *tp, int thflags)  in tcp_stretch_ack_enable()  argument
1316 	if (thflags & ~TH_ACK) {  in tcp_stretch_ack_enable()
1785 tcp_update_window(struct tcpcb *tp, int thflags, struct tcphdr * th,  in tcp_update_window()  argument
1789 	if ((thflags & TH_ACK) &&  in tcp_update_window()
1869 	int thflags;  in tcp_input()  local
2067 	thflags = th->th_flags;  in tcp_input()
2075 	if ((thflags & (TH_SYN | TH_FIN)) == (TH_SYN | TH_FIN)) {  in tcp_input()
2166 				if (thflags & TH_SYN) {  in tcp_input()
2178 				    ntohs(th->th_sport), thflags);  in tcp_input()
2182 				if ((thflags & TH_SYN) && !(thflags & TH_ACK) &&  in tcp_input()
2201 					if (thflags & TH_SYN) {  in tcp_input()
2343 	if ((thflags & TH_ACCEPT) == 0) {  in tcp_input()
2349 	if ((thflags & TH_SYN) == 0) {  in tcp_input()
2408 			if ((thflags & (TH_RST | TH_ACK | TH_SYN)) != TH_SYN) {  in tcp_input()
2411 				if (thflags & TH_RST) {  in tcp_input()
2413 					    thflags & TH_SYN ? "ignore SYN with RST" : "ignore RST");  in tcp_input()
2416 				if (thflags & TH_ACK) {  in tcp_input()
2418 					    thflags & TH_SYN ? "bad SYN with ACK" : "bad ACK");  in tcp_input()
2726 		    th->th_seq, th->th_ack, tlen, thflags,  in tcp_input()
2740 		if (tcp_stretch_ack_enable(tp, thflags)) {  in tcp_input()
2761 	if (thflags & TH_CWR) {  in tcp_input()
2796 	    (ip_ecn == IPTOS_ECN_CE || (thflags & TH_CWR))) {  in tcp_input()
2858 	if (tp->t_state == TCPS_SYN_SENT && (thflags & TH_SYN)) {  in tcp_input()
2859 		if (!(thflags & TH_ACK) ||  in tcp_input()
2879 	    (thflags & (TH_SYN | TH_FIN | TH_RST | TH_URG | TH_ACK | TH_ECE | TH_PUSH)) == TH_ACK &&  in tcp_input()
2950 	    (thflags & TH_FLAGS) == TH_ACK &&  in tcp_input()
3345 		if ((thflags & (TH_ECE | TH_CWR)) == (TH_ECE | TH_CWR)) {  in tcp_input()
3365 		if ((thflags & TH_ACK) &&  in tcp_input()
3379 		if ((thflags & TH_SYN) &&  in tcp_input()
3399 		if ((thflags & TH_ACK) &&  in tcp_input()
3406 		if (thflags & TH_RST) {  in tcp_input()
3407 			if ((thflags & TH_ACK) != 0) {  in tcp_input()
3433 		if ((thflags & TH_SYN) == 0) {  in tcp_input()
3442 		if (thflags & TH_ACK) {  in tcp_input()
3445 			if ((thflags & (TH_ECE | TH_CWR)) == (TH_ECE)) {  in tcp_input()
3544 				thflags &= ~TH_SYN;  in tcp_input()
3628 			thflags &= ~TH_FIN;  in tcp_input()
3641 		if (thflags & TH_ACK) {  in tcp_input()
3663 		if (thflags & TH_SYN && tlen <= 0) {  in tcp_input()
3751 	if (thflags & TH_RST) {  in tcp_input()
3893 		if (thflags & TH_SYN) {  in tcp_input()
3895 			thflags &= ~TH_SYN;  in tcp_input()
3900 				thflags &= ~TH_URG;  in tcp_input()
3910 		    || (todrop == tlen && (thflags & TH_FIN) == 0)) {  in tcp_input()
3916 			thflags &= ~TH_FIN;  in tcp_input()
3970 			thflags &= ~TH_URG;  in tcp_input()
4032 			if (thflags & TH_SYN &&  in tcp_input()
4058 		thflags &= ~(TH_PUSH | TH_FIN);  in tcp_input()
4082 	    ((thflags & (TH_SYN | TH_FIN)) != 0))) {  in tcp_input()
4095 	if (thflags & TH_SYN) {  in tcp_input()
4114 			thflags &= ~TH_SYN;  in tcp_input()
4123 	if ((thflags & TH_ACK) == 0) {  in tcp_input()
4221 		if (tlen == 0 && (thflags & TH_FIN) == 0) {  in tcp_input()
4396 				if ((thflags & TH_FIN) &&  in tcp_input()
4569 						tcp_update_window(tp, thflags,  in tcp_input()
4662 							tcp_update_window(tp, thflags, th, tiwin, tlen);  in tcp_input()
4674 						tcp_update_window(tp, thflags, th, tiwin, tlen);  in tcp_input()
4838 		if ((thflags & TH_ECE) != 0 && TCP_ECN_ENABLED(tp) &&  in tcp_input()
5023 	if (tcp_update_window(tp, thflags, th, tiwin, tlen)) {  in tcp_input()
5030 	if ((thflags & TH_URG) && th->th_urp &&  in tcp_input()
5040 			thflags &= ~TH_URG;             /* XXX */  in tcp_input()
5123 	if ((tlen || (thflags & TH_FIN)) &&  in tcp_input()
5168 			thflags = th->th_flags & TH_FIN;  in tcp_input()
5237 			thflags = tcp_reass(tp, th, &tlen, m, ifp, &read_wakeup);  in tcp_input()
5281 		thflags &= ~TH_FIN;  in tcp_input()
5288 	if (thflags & TH_FIN) {  in tcp_input()
5397 	if (tp->t_state == TCPS_SYN_RECEIVED && (thflags & TH_ACK) &&  in tcp_input()
5428 	if ((thflags & TH_RST) || m->m_flags & (M_BCAST | M_MCAST)) {  in tcp_input()
5454 	if (thflags & TH_ACK) {  in tcp_input()
5459 		if (thflags & TH_SYN) {  in tcp_input()