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()
1723 tcp_update_window(struct tcpcb *tp, int thflags, struct tcphdr * th,  in tcp_update_window()  argument
1727 	if ((thflags & TH_ACK) &&  in tcp_update_window()
2027 	int thflags;  in tcp_input()  local
2229 	thflags = th->th_flags;  in tcp_input()
2237 	if ((thflags & (TH_SYN | TH_FIN)) == (TH_SYN | TH_FIN)) {  in tcp_input()
2330 				if (thflags & TH_SYN) {  in tcp_input()
2342 				    ntohs(th->th_sport), thflags);  in tcp_input()
2346 				if ((thflags & TH_SYN) && !(thflags & TH_ACK) &&  in tcp_input()
2365 					if (thflags & TH_SYN) {  in tcp_input()
2520 	if ((thflags & TH_ACCEPT) == 0) {  in tcp_input()
2530 	if ((thflags & TH_SYN) == 0) {  in tcp_input()
2585 			if ((thflags & (TH_RST | TH_ACK | TH_SYN)) != TH_SYN) {  in tcp_input()
2588 				if (thflags & TH_RST) {  in tcp_input()
2590 					    thflags & TH_SYN ? "ignore SYN with RST" : "ignore RST");  in tcp_input()
2594 				if (thflags & TH_ACK) {  in tcp_input()
2596 					    thflags & TH_SYN ? "bad SYN with ACK" : "bad ACK");  in tcp_input()
2938 		    th->th_seq, th->th_ack, tlen, thflags,  in tcp_input()
2952 		if (tcp_stretch_ack_enable(tp, thflags)) {  in tcp_input()
2996 		if (thflags & TH_CWR) {  in tcp_input()
3052 	    (ip_ecn == IPTOS_ECN_CE || (thflags & TH_CWR))) {  in tcp_input()
3109 	if (tp->t_state == TCPS_SYN_SENT && (thflags & TH_SYN)) {  in tcp_input()
3110 		if (!(thflags & TH_ACK) ||  in tcp_input()
3130 	    (thflags & (TH_SYN | TH_FIN | TH_RST | TH_URG | TH_ACK | TH_ECE | TH_PUSH)) == TH_ACK &&  in tcp_input()
3201 	    (thflags & TH_FLAGS) == TH_ACK &&  in tcp_input()
3664 		int ace_flags = ((th->th_x2 << 8) | thflags) & TH_ACE;  in tcp_input()
3682 		if ((thflags & TH_ACK) &&  in tcp_input()
3697 		if ((thflags & TH_SYN) &&  in tcp_input()
3717 		if ((thflags & TH_ACK) &&  in tcp_input()
3725 		if (thflags & TH_RST) {  in tcp_input()
3726 			if ((thflags & TH_ACK) != 0) {  in tcp_input()
3755 		if ((thflags & TH_SYN) == 0) {  in tcp_input()
3765 		if (thflags & TH_ACK) {  in tcp_input()
3769 			const uint32_t ace_flags = ((th->th_x2 << 8) | thflags) & TH_ACE;  in tcp_input()
3771 			if ((thflags & (TH_ECE | TH_CWR)) == (TH_ECE)) {  in tcp_input()
4006 				thflags &= ~TH_SYN;  in tcp_input()
4093 			thflags &= ~TH_FIN;  in tcp_input()
4106 		if (thflags & TH_ACK) {  in tcp_input()
4131 		if (thflags & TH_SYN && tlen <= 0) {  in tcp_input()
4222 	if (thflags & TH_RST) {  in tcp_input()
4367 		if (thflags & TH_SYN) {  in tcp_input()
4369 			thflags &= ~TH_SYN;  in tcp_input()
4374 				thflags &= ~TH_URG;  in tcp_input()
4384 		    || (todrop == tlen && (thflags & TH_FIN) == 0)) {  in tcp_input()
4390 			thflags &= ~TH_FIN;  in tcp_input()
4444 			thflags &= ~TH_URG;  in tcp_input()
4507 			if (thflags & TH_SYN &&  in tcp_input()
4533 		thflags &= ~(TH_PUSH | TH_FIN);  in tcp_input()
4557 	    ((thflags & (TH_SYN | TH_FIN)) != 0))) {  in tcp_input()
4570 	if (thflags & TH_SYN) {  in tcp_input()
4591 			thflags &= ~TH_SYN;  in tcp_input()
4600 	if ((thflags & TH_ACK) == 0) {  in tcp_input()
4627 			int ace_flags = ((th->th_x2 << 8) | thflags) & TH_ACE;  in tcp_input()
4710 		if (TCP_ACC_ECN_ON(tp) && (thflags & (TH_SYN | TH_ACK)) == TH_ACK) {  in tcp_input()
4711 			const uint32_t ace_flags = ((th->th_x2 << 8) | thflags) & TH_ACE;  in tcp_input()
4994 				if ((thflags & TH_FIN) &&  in tcp_input()
5134 						tcp_update_window(tp, thflags,  in tcp_input()
5232 							tcp_update_window(tp, thflags, th, tiwin, tlen);  in tcp_input()
5247 						tcp_update_window(tp, thflags, th, tiwin, tlen);  in tcp_input()
5437 			if (TCP_ACC_ECN_ON(tp) && !(thflags & TH_SYN)) {  in tcp_input()
5469 			} else if (TCP_ECN_ENABLED(tp) && (thflags & TH_ECE)) {  in tcp_input()
5682 	if (tcp_update_window(tp, thflags, th, tiwin, tlen)) {  in tcp_input()
5689 	if ((thflags & TH_URG) && th->th_urp &&  in tcp_input()
5699 			thflags &= ~TH_URG;             /* XXX */  in tcp_input()
5783 	if ((tlen || (thflags & TH_FIN)) &&  in tcp_input()
5828 			thflags = th->th_flags & TH_FIN;  in tcp_input()
5897 			thflags = tcp_reass(tp, th, &tlen, m, ifp, &read_wakeup);  in tcp_input()
5941 		thflags &= ~TH_FIN;  in tcp_input()
5969 	if (thflags & TH_FIN) {  in tcp_input()
6074 	if (tp->t_state == TCPS_SYN_RECEIVED && (thflags & TH_ACK) &&  in tcp_input()
6099 	if ((thflags & TH_RST) || m->m_flags & (M_BCAST | M_MCAST)) {  in tcp_input()
6120 	if (thflags & TH_ACK) {  in tcp_input()
6125 		if (thflags & TH_SYN) {  in tcp_input()