bsd/netinet/tcp_input.c

1094 	register int thflags;
1378 	thflags = th->th_flags;
1388 	if (drop_synfin && (thflags & (TH_SYN|TH_FIN)) == (TH_SYN|TH_FIN)) {
1556 				if(thflags & TH_SYN)
1567 					ntohs(th->th_sport), thflags);
1570 				if ((thflags & TH_SYN) && !(thflags & TH_ACK) &&
1594 					if (thflags & TH_SYN)
1644 	if ((thflags & TH_SYN) == 0)
1697 			if ((thflags & (TH_RST|TH_ACK|TH_SYN)) != TH_SYN) {
1702 				if (thflags & TH_RST) {
1705 				if (thflags & TH_ACK) {
2088 	if ((thflags & TH_CWR) == TH_CWR) {
2097 		((ip_ecn == IPTOS_ECN_CE) || ((thflags & TH_CWR) == TH_CWR)))
2127 	if (tp->t_state == TCPS_SYN_SENT && (thflags & TH_SYN)) {
2160 	    (thflags & (TH_SYN|TH_FIN|TH_RST|TH_URG|TH_ACK|TH_ECE|TH_PUSH)) == TH_ACK &&
2229 	    (thflags & (TH_SYN|TH_FIN|TH_RST|TH_URG|TH_ACK|TH_ECE)) == TH_ACK &&
2251 		if (thflags & TH_FIN)
2585 		if ((thflags & (TH_ECE | TH_CWR)) == (TH_ECE | TH_CWR)) {
2605 		if ((thflags & TH_ACK) &&
2630 		if ((thflags & TH_ACK) &&
2640 		if (thflags & TH_RST) {
2641 			if ((thflags & TH_ACK) != 0) {
2650 		if ((thflags & TH_SYN) == 0)
2656 		if (thflags & TH_ACK) {
2659 			if ((thflags & (TH_ECE | TH_CWR)) == (TH_ECE)) {
2708 				thflags &= ~TH_SYN;
2746 			thflags &= ~TH_FIN;
2759  		if (thflags & TH_ACK)
2779 		if (thflags & TH_SYN)
2852 	if (thflags & TH_RST) {
2958 		if (thflags & TH_SYN) {
2959 			thflags &= ~TH_SYN;
2964 				thflags &= ~TH_URG;
2971 		    || (todrop == tlen && (thflags & TH_FIN) == 0)) {
2977 			thflags &= ~TH_FIN;
3008 			thflags &= ~TH_URG;
3044 			if (thflags & TH_SYN &&
3068 		thflags &= ~(TH_PUSH|TH_FIN);
3092 		((thflags & (TH_SYN|TH_FIN)) != 0))) {
3101 	if (thflags & TH_SYN) {
3117 	if ((thflags & TH_ACK) == 0) {
3173 		if (tlen == 0 && (thflags & TH_FIN) == 0)
3453 		if ((thflags & TH_ECE) != 0 &&
3602 	if ((thflags & TH_ACK) &&
3621 	if ((thflags & TH_URG) && th->th_urp &&
3631 			thflags &= ~TH_URG;		/* XXX */
3709 	if ((tlen || (thflags & TH_FIN)) &&
3716 		 * with control block tp.  Set thflags to whether reassembly now
3741 			thflags = th->th_flags & TH_FIN;
3759 			thflags = tcp_reass(tp, th, &tlen, m);
3785 		thflags &= ~TH_FIN;
3792 	if (thflags & TH_FIN) {
3906 	if (tp->t_state == TCPS_SYN_RECEIVED && (thflags & TH_ACK) &&
3937 	if ((thflags & TH_RST) || m->m_flags & (M_BCAST|M_MCAST))
3966 	if (thflags & TH_ACK)
3971 		if (thflags & TH_SYN)