bsd/netinet/tcp_output.c

270 	int flags, error;
309 	 * and flags that will be used.
471 	flags = tcp_outflags[tp->t_state];
537 	 * Get standard flags, and add SYN or FIN if requested by 'hidden'
538 	 * state flags.
541 		flags |= TH_FIN;
543 		flags |= TH_SYN;
570 				flags &= ~TH_FIN;
634 	if ((flags & TH_SYN) && SEQ_GT(tp->snd_nxt, tp->snd_una)) {
635 		flags &= ~TH_SYN;
679 	if ((flags & TH_SYN) && (tp->t_flags & TF_NOOPT)) {
681 		flags &= ~TH_FIN;
689 	if (len <= 0 && !(flags & TH_SYN)) {
802 			flags &= ~TH_FIN;
805 			flags &= ~TH_FIN;
915 	if ((flags & TH_RST) ||
916 	    ((flags & TH_SYN) && (tp->t_flags & TF_NEEDSYN) == 0))
924 	if (flags & TH_FIN &&
1015 	if (flags & TH_SYN) {
1027 			    ((flags & TH_ACK) == 0 ||
1057 	if (tcp_ecn_inbound && (flags & (TH_SYN | TH_ACK)) == (TH_SYN | TH_ACK)) {
1061 				flags |= TH_ECE;
1081 	else if (tcp_ecn_outbound && (flags & (TH_SYN | TH_ACK)) == TH_SYN) {
1084 			flags |= (TH_ECE | TH_CWR);
1111 		flags |= TH_CWR;
1119 		flags |= TH_ECE;
1128  	    (flags & TH_RST) == 0 &&
1129 	    ((flags & TH_ACK) == 0 ||
1159 		if ((flags & TH_SYN) &&
1160 		    (!(flags & TH_ACK) || (tp->t_flags & TF_SACK_PERMIT))) {
1263 		flags &= ~TH_FIN;
1428 			flags |= TH_PUSH;
1432 		else if (flags & (TH_SYN|TH_FIN|TH_RST))
1488 	if (flags & TH_FIN && (tp->t_flags & TF_SENTFIN) &&
1505 		if (len || (flags & (TH_SYN|TH_FIN)) || tp->t_timer[TCPT_PERSIST])
1521 	th->th_flags = flags;
1631 		if (flags & (TH_SYN|TH_FIN)) {
1632 			if (flags & TH_SYN)
1634 			if (flags & TH_FIN) {
1681 		if (flags & TH_SYN)
1683 		if (flags & TH_FIN) {
1906 			if ((flags & TH_SYN) == 0) {
1982     int cnt, struct mbuf *opt, int flags, int sack_in_progress, int recwin,
2027 		flags |= IPV6_OUTARGS;
2030 		flags |= IP_OUTARGS;
2112 			    inp->in6p_outputopts, &ro6, flags, NULL, NULL,
2116 			error = ip_output_list(pkt, cnt, opt, &ro, flags, NULL,