common.h

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#ifndef INFUSE_SDK_INCLUDE_INFUSE_EPACKET_INTERFACE_COMMON_H_
#define INFUSE_SDK_INCLUDE_INFUSE_EPACKET_INTERFACE_COMMON_H_
 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
/* Versioned data frame */
struct epacket_v0_versioned_frame_format {
        /* AEAD associated data */
        union {
                struct {
                        /* Frame version */
                        uint8_t version;
                        /* Payload type */
                        uint8_t type;
                        /* Payload flags */
                        uint16_t flags;
                        /* Network or device key identifier */
                        uint8_t key_identifier[3];
                        /* Infuse device ID (upper 4 bytes) */
                        uint32_t device_id_upper;
                } __packed;
                uint8_t raw[11];
        } associated_data;
        /* AEAD encryption nonce (IV) */
        union {
                struct {
                        /* Infuse device ID (lower 4 bytes) */
                        uint32_t device_id_lower;
                        /* Local GPS time (seconds) */
                        uint32_t gps_time;
                        /* Packet sequence number */
                        uint16_t sequence;
                        /* Random entropy */
                        uint16_t entropy;
                } __packed;
                uint8_t raw[12];
        } nonce;
        /* Ciphertext + tag bytes */
        uint8_t ciphertext_tag[];
} __packed;
 
/* Unversioned data frame */
struct epacket_v0_unversioned_frame_format {
        /* AEAD associated data */
        union {
                struct {
                        /* Payload type */
                        uint8_t type;
                        /* Payload flags */
                        uint16_t flags;
                        /* Network or device key identifier */
                        uint8_t key_identifier[3];
                        /* Infuse device ID (upper 4 bytes) */
                        uint32_t device_id_upper;
                } __packed;
                uint8_t raw[10];
        } associated_data;
        /* AEAD encryption nonce (IV) */
        union {
                struct {
                        /* Infuse device ID (lower 4 bytes) */
                        uint32_t device_id_lower;
                        /* Local GPS time (seconds) */
                        uint32_t gps_time;
                        /* Packet sequence number */
                        uint16_t sequence;
                        /* Random entropy */
                        uint16_t entropy;
                } __packed;
                uint8_t raw[12];
        } nonce;
        /* Ciphertext + tag bytes */
        uint8_t ciphertext_tag[];
} __packed;
 
#ifdef __cplusplus
}
#endif
 
#endif /* INFUSE_SDK_INCLUDE_INFUSE_EPACKET_INTERFACE_COMMON_H_ */