sys/netinet/tcp_input.c

599 	int thflags;
782 	thflags = th->th_flags;
801 	if ((thflags & (TH_FIN | TH_RST)) != 0) {
906 		if ((tcp_log_in_vain == 1 && (thflags & TH_SYN)) ||
916 		if ((V_blackhole == 1 && (thflags & TH_SYN)) ||
990 		if (thflags & TH_SYN)
1027 	if ((thflags & (TH_FIN | TH_RST)) != 0)
1030 	if (!((tp->t_state == TCPS_ESTABLISHED && (thflags & TH_SYN) == 0) ||
1031 	      (tp->t_state == TCPS_LISTEN && (thflags & TH_SYN) &&
1101 		if ((thflags & (TH_RST|TH_ACK|TH_SYN)) == TH_ACK) {
1169 				    (thflags & TH_SYN) ? TO_SYN : 0);
1178 					if ((thflags & TH_RST) == 0 ||
1206 		if (thflags & TH_RST) {
1213 		if ((thflags & TH_SYN) == 0) {
1224 		if (thflags & TH_ACK) {
1245 		if ((thflags & TH_FIN) && V_drop_synfin) {
1260 		KASSERT((thflags & (TH_RST|TH_ACK)) == 0,
1262 		KASSERT(thflags & (TH_SYN),
1419 		    (thflags & TH_SYN) ? TO_SYN : 0);
1427 			if ((thflags & TH_RST) == 0 ||
1502 	int thflags, acked, ourfinisacked, needoutput = 0, sack_changed;
1520 	thflags = th->th_flags;
1531 	if ((thflags & (TH_SYN | TH_FIN | TH_RST)) != 0 ||
1578 		if (thflags & TH_CWR)
1597 		if (thflags & TH_ECE) {
1607 	    (thflags & TH_SYN) ? TO_SYN : 0);
1646 	if (tp->t_state == TCPS_SYN_SENT && (thflags & TH_SYN)) {
1688 	    (thflags & (TH_SYN|TH_FIN|TH_RST|TH_URG|TH_ACK)) == TH_ACK &&
1957 		if ((thflags & TH_ACK) &&
1972 			if ((thflags & (TH_SYN|TH_ACK)) == (TH_SYN|TH_ACK)) {
1975 			} else if (thflags & TH_SYN) {
1980 			} else if (!(thflags & (TH_ACK|TH_FIN|TH_RST))) {
2002 		if ((thflags & TH_ACK) &&
2008 		if ((thflags & (TH_ACK|TH_RST)) == (TH_ACK|TH_RST)) {
2013 		if (thflags & TH_RST)
2015 		if (!(thflags & TH_SYN))
2020 		if (thflags & TH_ACK) {
2044 			if ((thflags & TH_ECE) && V_tcp_do_ecn) {
2059 				thflags &= ~TH_SYN;
2097 			thflags &= ~TH_FIN;
2110 		if (thflags & TH_ACK)
2141 	if (thflags & TH_RST) {
2200 	if ((thflags & TH_SYN) && tp->t_state != TCPS_SYN_SENT &&
2267 		if (thflags & TH_SYN) {
2268 			thflags &= ~TH_SYN;
2273 				thflags &= ~TH_URG;
2280 		    || (todrop == tlen && (thflags & TH_FIN) == 0)) {
2286 			thflags &= ~TH_FIN;
2306 			thflags &= ~TH_URG;
2359 		thflags &= ~(TH_PUSH|TH_FIN);
2383 		((thflags & (TH_SYN|TH_FIN)) != 0))) {
2393 	if ((thflags & TH_ACK) == 0) {
2470 		if (tlen == 0 && (thflags & TH_FIN) == 0)
2522 				if ((thflags & TH_FIN) &&
2934 	if ((thflags & TH_ACK) &&
2953 	if ((thflags & TH_URG) && th->th_urp &&
2964 			thflags &= ~TH_URG;		/* XXX */
3025 	if ((tlen || (thflags & TH_FIN) || tfo_syn) &&
3031 		 * with control block tp.  Set thflags to whether reassembly now
3050 			thflags = th->th_flags & TH_FIN;
3067 			thflags = tcp_reass(tp, th, &tlen, m);
3086 		thflags &= ~TH_FIN;
3093 	if (thflags & TH_FIN) {
3192 	if (tp->t_state == TCPS_SYN_RECEIVED && (thflags & TH_ACK) &&