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The following structures use raw pointers in src/lib/dhcp/option_data_types.h:

struct OptionDefParams {
    const char*             name;           // option name
    uint16_t                code;           // option code
    const char*             space;          // option space
    OptionDataType          type;           // data type
    bool                    array;          // is array
    const OptionDataType*   records;        // record fields
    size_t                  records_size;   // number of fields in a record
    const char*             encapsulates;   // option space encapsulated by the
                                            // particular option.
};

/// @brief Encapsulation of option definition parameters and the structure size.
struct OptionDefParamsEncapsulation {
    const struct OptionDefParams*   optionDefParams;    // parameters structure
    const int                       size;               // structure size
    const char*                     space;              // option space
};

Those structures should be converted to a safer approach - either plain std::string or a smartptr if some data sharing is needed.