libpldm/firmware_update.h

#ifndef FW_UPDATE_H
#define FW_UPDATE_H

#ifdef __cplusplus
extern "C" {
#endif
#include "base.h"

#define PLDM_QUERY_DEVICE_IDENTIFIERS_REQ_BYTES 0
/** @brief Minimum length of device descriptor, 2 bytes for descriptor type,
 *         2 bytes for descriptor length and atleast 1 byte of descriptor data
 */
#define PLDM_FWUP_DEVICE_DESCRIPTOR_MIN_LEN 5

/** @brief PLDM Firmware update commands
 */
enum pldm_firmware_update_commands { PLDM_QUERY_DEVICE_IDENTIFIERS = 0x01 };

/** @struct pldm_query_device_identifiers_resp
 *
 *  Structure representing query device identifiers response.
 */
struct pldm_query_device_identifiers_resp {
	uint8_t completion_code;
	uint32_t device_identifiers_len;
	uint8_t descriptor_count;
} __attribute__((packed));

/** @brief Create a PLDM request message for QueryDeviceIdentifiers
 *
 *  @param[in] instance_id - Message's instance id
 *  @param[in] payload_length - Length of the request message payload
 *  @param[in,out] msg - Message will be written to this
 *
 *  @return pldm_completion_codes
 *
 *  @note  Caller is responsible for memory alloc and dealloc of param
 *         'msg.payload'
 */
int encode_query_device_identifiers_req(uint8_t instance_id,
					size_t payload_length,
					struct pldm_msg *msg);

/** @brief Decode QueryDeviceIdentifiers response message
 *
 *  @param[in] msg - Response message
 *  @param[in] payload_length - Length of response message payload
 *  @param[out] completion_code - Pointer to response msg's PLDM completion code
 *  @param[out] device_identifiers_len - Pointer to device identifiers length
 *  @param[out] descriptor_count - Pointer to descriptor count
 *  @param[out] descriptor_data - Pointer to descriptor data
 *
 *  @return pldm_completion_codes
 */
int decode_query_device_identifiers_resp(const struct pldm_msg *msg,
					 size_t payload_length,
					 uint8_t *completion_code,
					 uint32_t *device_identifiers_len,
					 uint8_t *descriptor_count,
					 uint8_t **descriptor_data);
#ifdef __cplusplus
}
#endif

#endif // End of FW_UPDATE_H