O_BASIC_IP_DSTPORT
(*cmd)->opcode = O_BASIC_IP_DSTPORT;
keyword(MODULE_BASIC_ID, O_BASIC_IP_DSTPORT, "dst-port", FILTER);
function(MODULE_BASIC_ID, O_BASIC_IP_DSTPORT,
O_BASIC_IP_DSTPORT, (filter_func)check_dst_port);