/**
@file     si_common.h
@brief    Copy of System Interceptors common structures for driver usage 
@details  Copyright (c) 2024 Acronis International GmbH
@author   Denis Kopyrin ([email protected])
@since    $Id: $
*/

#pragma once

#include "transport_protocol.h"

// !!! Properties here must match exactly av-sdk !!!

#if !defined PACKED
#define PACKED __attribute__((packed))
#endif

typedef msg_type_t SiOperationType;

typedef enum {
  SI_PI_UNKNOWN = 0,
  SI_PI_EVENT_UID,
  SI_PI_THREAD_ID,
  SI_PI_THREAD_UID,
  SI_PI_PROCESS_ID,
  SI_PI_PROCESS_UID,
  SI_PI_PARENT_PROCESS_ID,
  SI_PI_PARENT_PROCESS_UID,
  SI_PI_OBJECT_NAME,
  SI_PI_TARGET_NAME,
  SI_PI_OBJECT_ID,
  SI_PI_TARGET_ID,
  SI_PI_OBJECT_REGION,
  SI_PI_FLAGS,
  SI_PI_IMAGE_FILE_NAME,
  SI_PI_COMMAND_LINE,
  SI_PI_PROCESS_FILE_NAME_IS_NOT_PATH,
  SI_PI_TERMINATED_PROCESS,
  // ...
  SI_PI_FILE_MODIFIED = 39,
  // ...
  SI_PI_ACCESS_MODE = 41,
  SI_PI_FILE_POS,
  SI_PI_PROTECTION,
  SI_PI_CONTROL_COMMAND,
  SI_PI_CONTROL_ARG,
  SI_PI_USER_ID,
  SI_PI_GROUP_ID,
  // ...
  SI_PI_EVENT_TIMESTAMP = 53,
  SI_PI_PROCESS_START_TIMESTAMP,
  // ...
  SI_PI_VOLUME_ID_LOW = 80,
  SI_PI_VOLUME_ID_HIGH,
  // ...
  SI_PI_CURRENT_WORKING_DIRECTORY = 89,
  // ...
  SI_PI_SYSTEM_TIME_OLD_TIMESTAMP = 93,
  SI_PI_SYSTEM_TIME_NEW_TIMESTAMP,
  SI_PI_ARTIFICIAL_PROCESS_START_TIMESTAMP,
  SI_PI_PARENT_ARTIFICIAL_PROCESS_START_TIMESTAMP,
  // ...
  SI_PI_EFFECTIVE_USER_ID = 99,
  SI_PI_EFFECTIVE_GROUP_ID,
  SI_PI_FILE_TYPE,
  SI_PI_SAVED_USER_ID,
  SI_PI_SAVED_GROUP_ID,
  SI_PI_AUDIT_USER_ID,
  SI_PI_AUDIT_SESSION_ID,
  SI_PI_PROCESS_ID_VERSION,
  SI_PI_RESPONSIBLE_PROCESS_ID,
  SI_PI_RESPONSIBLE_PROCESS_ARTIFICIAL_START_TIMESTAMP,
  SI_PI_FILE_ATTRIBUTES,
  SI_PI_FILE_CHANGE_TIME,
  SI_PI_FILE_BIRTH_TIME,
  SI_PI_FILE_ACCESS_TIME,
  SI_PI_FILE_MODIFICATION_TIME,
  SI_PI_UNIX_EXEC_TYPE,
  // ...
  SI_PI_OBJECT_FILE_HANDLE = 116,
  // ...
  SI_PI_PARENT_PROCESS_START_TIMESTAMP = 119,
  // ...
  SI_PI_SOCKET_PORT = 124,
  SI_PI_SOCKET_FAMILY,
  SI_PI_SOCKET_PROTOCOL,
  SI_PI_SOCKET_ADDRESS,
  SI_PI_NETWORK_HOST,
  SI_PI_NETWORK_URL,
  SI_PI_HTTP_METHOD,

  SI_PI_CGROUP_NAME,
} SiPropertyId;

typedef enum {
  SI_VT_SIGNED8_TYPE = 0,
  SI_VT_SIGNED16_TYPE,
  SI_VT_SIGNED32_TYPE,
  SI_VT_SIGNED64_TYPE,
  SI_VT_UNSIGNED8_TYPE,
  SI_VT_UNSIGNED16_TYPE,
  SI_VT_UNSIGNED32_TYPE,
  SI_VT_UNSIGNED64_TYPE,
  SI_VT_BYTE_ARRAY_TYPE,   ///< SiVector
  SI_VT_UTF8_STRING_TYPE,  ///< SiVector
  SI_VT_UTF16_STRING_TYPE, ///< SiVector
  SI_VT_OBJECT_ID_TYPE,    ///< SiObjectId
  SI_VT_REGION_TYPE,       ///< SiRegion
  SI_VT_BOOLEAN_TYPE,      ///< uint8_t : 0 = false, not 0 = true
  SI_VT_BLOB_TYPE,         ///< SiBLOB

  SI_VT_MAX_PROPERTY_VALUE_TYPE
} SiPropertyValueType;

typedef struct PACKED {
  uint32_t SizeInBytes;
  uint8_t  VectorBuffer[];
} SiVector;

typedef struct PACKED {
  uint32_t Size;
  uint16_t PropertyId;     ///< SiPropertyId enum type
  uint8_t  ValueType;      ///< SiPropertyValueType enum type
  uint8_t  ValueBuffer[];
} SiProperty;

typedef struct PACKED {
  uint64_t Start;
  uint64_t Length;
} SiRegion;

typedef enum {
  SI_CT_PRE_CALLBACK,
  SI_CT_POST_CALLBACK,
} SiOpCallbackType;

typedef enum {
  // Process performed 'exec' syscall
  SI_UNIX_EXEC_TYPE_EXEC,
  // Process created as a result of 'posix_spawn' syscall
  SI_UNIX_EXEC_TYPE_POSIX_SPAWN,
  // Process was detected to have audit token EXEC for which was not sent previously.
  // Such event triggers 'fake' EXEC for BE to handle
  SI_UNIX_EXEC_TYPE_GENERATED,
} SiUnixExecType;

typedef struct PACKED {
  uint32_t   Size;
  uint16_t   Operation;     ///< SiOperationType enum type
  uint16_t   CallbackType;  ///< SiOpCallbackType enum type
  uint64_t   ProcessUID;
  uint32_t   PropertiesNumber;
  SiProperty FirstProperty[];
} SiEvent;

typedef struct PACKED {
  uint32_t   Size;
  uint32_t   PropertiesNumber;
  SiProperty FirstProperty[];
} SiInfo;

typedef struct PACKED {
  uint64_t DeviceId;
  uint64_t Id;
} SiObjectId;

typedef struct PACKED {
  uint64_t microseconds;
} SiTimeMicroseconds;

// Mapped to SiRegion
typedef struct PACKED {
  uint64_t seconds;
  uint64_t nanoseconds;
} SiTimeSpec;

typedef struct {
  const char* value;
  uint32_t length;
} SiSizedString;

typedef struct {
  const void* value;
  uint32_t length;
} SiSizedBuffer;