libpldmresponder/fru.hpp

#pragma once

#include "config.h"

#include "fru_parser.hpp"
#include "handler.hpp"

#include <map>
#include <sdbusplus/message.hpp>
#include <string>
#include <variant>
#include <vector>

#include "libpldm/fru.h"

namespace pldm
{

namespace responder
{

namespace dbus
{

using Value =
    std::variant<bool, uint8_t, int16_t, uint16_t, int32_t, uint32_t, int64_t,
                 uint64_t, double, std::string, std::vector<uint8_t>>;
using PropertyMap = std::map<Property, Value>;
using InterfaceMap = std::map<Interface, PropertyMap>;
using ObjectValueTree = std::map<sdbusplus::message::object_path, InterfaceMap>;

} // namespace dbus

/** @class FruImpl
 *
 *  @brief Builds the PLDM FRU table containing the FRU records
 */
class FruImpl
{
  public:
    /* @brief Header size for FRU record, it includes the FRU record set
     *        identifier, FRU record type, Number of FRU fields, Encoding type
     *        of FRU fields
     */
    static constexpr size_t recHeaderSize =
        sizeof(struct pldm_fru_record_data_format) -
        sizeof(struct pldm_fru_record_tlv);

    /** @brief The FRU table is populated by processing the D-Bus inventory
     *         namespace, based on the config files for FRU. The configPath is
     *         consumed to build the FruParser object.
     *
     *  @param[in] configPath - path to the directory containing config files
     * for PLDM FRU
     */
    FruImpl(const std::string& configPath);

    /** @brief Total length of the FRU table in bytes, this excludes the pad
     *         bytes and the checksum.
     *
     *  @return size of the FRU table
     */
    uint32_t size() const
    {
        return table.size() - padBytes;
    }

    /** @brief The checksum of the contents of the FRU table
     *
     *  @return checksum
     */
    uint32_t checkSum() const
    {
        return checksum;
    }

    /** @brief Number of record set identifiers in the FRU tables
     *
     *  @return number of record set identifiers
     */
    uint16_t numRSI() const
    {
        return rsi;
    }

    /** @brief The number of FRU records in the table
     *
     *  @return number of FRU records
     */
    uint16_t numRecords() const
    {
        return numRecs;
    }

    /** @brief Get the FRU table
     *
     *  @param[out] - Populate response with the FRU table
     */
    void getFRUTable(Response& response);

  private:
    uint16_t nextRSI()
    {
        return ++rsi;
    }

    uint16_t rsi = 0;
    uint16_t numRecs = 0;
    uint8_t padBytes = 0;
    std::vector<uint8_t> table;
    uint32_t checksum = 0;

    /** @brief populateRecord builds the FRU records for an instance of FRU and
     *         updates the FRU table with the FRU records.
     *
     *  @param[in] interfaces - D-Bus interfaces and the associated property
     *                          values for the FRU
     *  @param[in] recordInfos - FRU record info to build the FRU records
     */
    void populateRecords(const pldm::responder::dbus::InterfaceMap& interfaces,
                         const fru_parser::FruRecordInfos& recordInfos);
};

} // namespace responder

} // namespace pldm