203 	unsigned ipoptlen, optlen, hdrlen, ulen;  in tcp_default_output()  local
779 	optlen = 0;  in tcp_default_output()
882 		hdrlen += optlen = tcp_addoptions(&to, opt);  in tcp_default_output()
905 	if (len + optlen + ipoptlen > tp->t_maxseg) {  in tcp_default_output()
947 			max_len = tp->t_maxseg - optlen - ipsec_optlen;  in tcp_default_output()
977 			if (optlen + ipoptlen >= tp->t_maxseg) {  in tcp_default_output()
991 			len = tp->t_maxseg - optlen - ipoptlen;  in tcp_default_output()
1101 			if (len <= (tp->t_maxseg - optlen)) {  in tcp_default_output()
1268 	if (optlen) {  in tcp_default_output()
1269 		bcopy(opt, th + 1, optlen);  in tcp_default_output()
1270 		th->th_off = (sizeof (struct tcphdr) + optlen) >> 2;  in tcp_default_output()
1369 			    sizeof(struct tcphdr) + optlen + len, IPPROTO_TCP,  in tcp_default_output()
1391 			    IPPROTO_TCP + len + optlen));  in tcp_default_output()
1405 		KASSERT(len > tp->t_maxseg - optlen - ipsec_optlen,  in tcp_default_output()
1408 		m->m_pkthdr.tso_segsz = tp->t_maxseg - optlen - ipsec_optlen;  in tcp_default_output()
1808 	u_int32_t mask, optlen = 0;  in tcp_addoptions()  local
1813 		if (optlen == TCP_MAXOLEN)  in tcp_addoptions()
1817 			while (optlen % 4) {  in tcp_addoptions()
1818 				optlen += TCPOLEN_NOP;  in tcp_addoptions()
1821 			if (TCP_MAXOLEN - optlen < TCPOLEN_MAXSEG)  in tcp_addoptions()
1823 			optlen += TCPOLEN_MAXSEG;  in tcp_addoptions()
1831 			while (!optlen || optlen % 2 != 1) {  in tcp_addoptions()
1832 				optlen += TCPOLEN_NOP;  in tcp_addoptions()
1835 			if (TCP_MAXOLEN - optlen < TCPOLEN_WINDOW)  in tcp_addoptions()
1837 			optlen += TCPOLEN_WINDOW;  in tcp_addoptions()
1843 			while (optlen % 2) {  in tcp_addoptions()
1844 				optlen += TCPOLEN_NOP;  in tcp_addoptions()
1847 			if (TCP_MAXOLEN - optlen < TCPOLEN_SACK_PERMITTED)  in tcp_addoptions()
1849 			optlen += TCPOLEN_SACK_PERMITTED;  in tcp_addoptions()
1854 			while (!optlen || optlen % 4 != 2) {  in tcp_addoptions()
1855 				optlen += TCPOLEN_NOP;  in tcp_addoptions()
1858 			if (TCP_MAXOLEN - optlen < TCPOLEN_TIMESTAMP)  in tcp_addoptions()
1860 			optlen += TCPOLEN_TIMESTAMP;  in tcp_addoptions()
1874 			while (!optlen || optlen % 4 != 2) {  in tcp_addoptions()
1875 				optlen += TCPOLEN_NOP;  in tcp_addoptions()
1878 			if (TCP_MAXOLEN - optlen < TCPOLEN_SIGNATURE) {  in tcp_addoptions()
1882 			optlen += TCPOLEN_SIGNATURE;  in tcp_addoptions()
1896 			while (!optlen || optlen % 4 != 2) {  in tcp_addoptions()
1897 				optlen += TCPOLEN_NOP;  in tcp_addoptions()
1900 			if (TCP_MAXOLEN - optlen < TCPOLEN_SACKHDR + TCPOLEN_SACK)  in tcp_addoptions()
1902 			optlen += TCPOLEN_SACKHDR;  in tcp_addoptions()
1905 					(TCP_MAXOLEN - optlen) / TCPOLEN_SACK);  in tcp_addoptions()
1914 				optlen += TCPOLEN_SACK;  in tcp_addoptions()
1926 			if (TCP_MAXOLEN - optlen < total_len) {  in tcp_addoptions()
1936 			optlen += total_len;  in tcp_addoptions()
1946 	if (optlen % 4) {  in tcp_addoptions()
1947 		optlen += TCPOLEN_EOL;  in tcp_addoptions()
1956 	while (optlen % 4) {  in tcp_addoptions()
1957 		optlen += TCPOLEN_PAD;  in tcp_addoptions()
1961 	KASSERT(optlen <= TCP_MAXOLEN, ("%s: TCP options too long", __func__));  in tcp_addoptions()
1962 	return (optlen);  in tcp_addoptions()