IP_CT_TCP_FLAG_WINDOW_SCALE		0x01
IP_CT_TCP_FLAG_SACK_PERM		0x02
IP_CT_TCP_FLAG_CLOSE_INIT		0x04
IP_CT_TCP_FLAG_BE_LIBERAL		0x08
IP_CT_TCP_FLAG_DATA_UNACKNOWLEDGED	0x10
IP_CT_TCP_FLAG_MAXACK_SET		0x20
IP_CT_EXP_CHALLENGE_ACK			0x40
IP_CT_TCP_SIMULTANEOUS_OPEN		0x80