O_LAYER4_TCPFLAG
keyword(MODULE_LAYER4_ID, O_LAYER4_TCPFLAG, "tcpflag", FILTER);
function(MODULE_LAYER4_ID, O_LAYER4_TCPFLAG,
(*cmd)->opcode = O_LAYER4_TCPFLAG;
ip_fw3_register_filter_funcs(MODULE_LAYER4_ID, O_LAYER4_TCPFLAG,