/** @file * @brief Bluetooth Mesh Access Layer APIs. */ /* * Copyright (c) 2017 Intel Corporation * * SPDX-License-Identifier: Apache-2.0 */ #ifndef __BT_MESH_ACCESS_H #define __BT_MESH_ACCESS_H /** * @brief Bluetooth Mesh Access Layer * @defgroup bt_mesh_access Bluetooth Mesh Access Layer * @ingroup bt_mesh * @{ */ #ifdef __cplusplus extern "C" { #endif #define BT_MESH_ADDR_UNASSIGNED 0x0000 #define BT_MESH_ADDR_ALL_NODES 0xffff #define BT_MESH_ADDR_PROXIES 0xfffc #define BT_MESH_ADDR_FRIENDS 0xfffd #define BT_MESH_ADDR_RELAYS 0xfffe #define BT_MESH_KEY_UNUSED 0xffff #define BT_MESH_KEY_ANY 0xffff #define BT_MESH_KEY_DEV 0xfffe #define BT_MESH_KEY_DEV_LOCAL BT_MESH_KEY_DEV #define BT_MESH_KEY_DEV_REMOTE 0xfffd #define BT_MESH_KEY_DEV_ANY 0xfffc #define BT_MESH_ADDR_IS_UNICAST(addr) ((addr) && (addr) < 0x8000) #define BT_MESH_ADDR_IS_GROUP(addr) ((addr) >= 0xc000 && (addr) <= 0xff00) #define BT_MESH_ADDR_IS_VIRTUAL(addr) ((addr) >= 0x8000 && (addr) < 0xc000) #define BT_MESH_ADDR_IS_RFU(addr) ((addr) >= 0xff00 && (addr) <= 0xfffb) #define BT_MESH_IS_DEV_KEY(key) (key == BT_MESH_KEY_DEV_LOCAL || \ key == BT_MESH_KEY_DEV_REMOTE) #define BT_MESH_APP_SEG_SDU_MAX 12 #define BT_MESH_TX_SDU_MAX (CONFIG_BT_MESH_TX_SEG_MAX * BT_MESH_APP_SEG_SDU_MAX) #define BT_MESH_RX_SDU_MAX (CONFIG_BT_MESH_RX_SEG_MAX * BT_MESH_APP_SEG_SDU_MAX) /** Helper to define a mesh element within an array. * * In case the element has no SIG or Vendor models the helper * macro BT_MESH_MODEL_NONE can be given instead. * * @param _loc Location Descriptor. * @param _mods Array of models. * @param _vnd_mods Array of vendor models. */ #define BT_MESH_ELEM(_loc, _mods, _vnd_mods) \ { \ .loc = (_loc), \ .model_count = ARRAY_SIZE(_mods), \ .models = (_mods), \ .vnd_model_count = ARRAY_SIZE(_vnd_mods), \ .vnd_models = (_vnd_mods), \ } /** Abstraction that describes a Mesh Element */ struct bt_mesh_elem { /* Unicast Address. Set at runtime during provisioning. */ uint16_t addr; /* Location Descriptor (GATT Bluetooth Namespace Descriptors) */ const uint16_t loc; const uint8_t model_count; const uint8_t vnd_model_count; struct bt_mesh_model * const models; struct bt_mesh_model * const vnd_models; }; /* Foundation Models */ #define BT_MESH_MODEL_ID_CFG_SRV 0x0000 #define BT_MESH_MODEL_ID_CFG_CLI 0x0001 #define BT_MESH_MODEL_ID_HEALTH_SRV 0x0002 #define BT_MESH_MODEL_ID_HEALTH_CLI 0x0003 /* Models from the Mesh Model Specification */ #define BT_MESH_MODEL_ID_GEN_ONOFF_SRV 0x1000 #define BT_MESH_MODEL_ID_GEN_ONOFF_CLI 0x1001 #define BT_MESH_MODEL_ID_GEN_LEVEL_SRV 0x1002 #define BT_MESH_MODEL_ID_GEN_LEVEL_CLI 0x1003 #define BT_MESH_MODEL_ID_GEN_DEF_TRANS_TIME_SRV 0x1004 #define BT_MESH_MODEL_ID_GEN_DEF_TRANS_TIME_CLI 0x1005 #define BT_MESH_MODEL_ID_GEN_POWER_ONOFF_SRV 0x1006 #define BT_MESH_MODEL_ID_GEN_POWER_ONOFF_SETUP_SRV 0x1007 #define BT_MESH_MODEL_ID_GEN_POWER_ONOFF_CLI 0x1008 #define BT_MESH_MODEL_ID_GEN_POWER_LEVEL_SRV 0x1009 #define BT_MESH_MODEL_ID_GEN_POWER_LEVEL_SETUP_SRV 0x100a #define BT_MESH_MODEL_ID_GEN_POWER_LEVEL_CLI 0x100b #define BT_MESH_MODEL_ID_GEN_BATTERY_SRV 0x100c #define BT_MESH_MODEL_ID_GEN_BATTERY_CLI 0x100d #define BT_MESH_MODEL_ID_GEN_LOCATION_SRV 0x100e #define BT_MESH_MODEL_ID_GEN_LOCATION_SETUPSRV 0x100f #define BT_MESH_MODEL_ID_GEN_LOCATION_CLI 0x1010 #define BT_MESH_MODEL_ID_GEN_ADMIN_PROP_SRV 0x1011 #define BT_MESH_MODEL_ID_GEN_MANUFACTURER_PROP_SRV 0x1012 #define BT_MESH_MODEL_ID_GEN_USER_PROP_SRV 0x1013 #define BT_MESH_MODEL_ID_GEN_CLIENT_PROP_SRV 0x1014 #define BT_MESH_MODEL_ID_GEN_PROP_CLI 0x1015 #define BT_MESH_MODEL_ID_SENSOR_SRV 0x1100 #define BT_MESH_MODEL_ID_SENSOR_SETUP_SRV 0x1101 #define BT_MESH_MODEL_ID_SENSOR_CLI 0x1102 #define BT_MESH_MODEL_ID_TIME_SRV 0x1200 #define BT_MESH_MODEL_ID_TIME_SETUP_SRV 0x1201 #define BT_MESH_MODEL_ID_TIME_CLI 0x1202 #define BT_MESH_MODEL_ID_SCENE_SRV 0x1203 #define BT_MESH_MODEL_ID_SCENE_SETUP_SRV 0x1204 #define BT_MESH_MODEL_ID_SCENE_CLI 0x1205 #define BT_MESH_MODEL_ID_SCHEDULER_SRV 0x1206 #define BT_MESH_MODEL_ID_SCHEDULER_SETUP_SRV 0x1207 #define BT_MESH_MODEL_ID_SCHEDULER_CLI 0x1208 #define BT_MESH_MODEL_ID_LIGHT_LIGHTNESS_SRV 0x1300 #define BT_MESH_MODEL_ID_LIGHT_LIGHTNESS_SETUP_SRV 0x1301 #define BT_MESH_MODEL_ID_LIGHT_LIGHTNESS_CLI 0x1302 #define BT_MESH_MODEL_ID_LIGHT_CTL_SRV 0x1303 #define BT_MESH_MODEL_ID_LIGHT_CTL_SETUP_SRV 0x1304 #define BT_MESH_MODEL_ID_LIGHT_CTL_CLI 0x1305 #define BT_MESH_MODEL_ID_LIGHT_CTL_TEMP_SRV 0x1306 #define BT_MESH_MODEL_ID_LIGHT_HSL_SRV 0x1307 #define BT_MESH_MODEL_ID_LIGHT_HSL_SETUP_SRV 0x1308 #define BT_MESH_MODEL_ID_LIGHT_HSL_CLI 0x1309 #define BT_MESH_MODEL_ID_LIGHT_HSL_HUE_SRV 0x130a #define BT_MESH_MODEL_ID_LIGHT_HSL_SAT_SRV 0x130b #define BT_MESH_MODEL_ID_LIGHT_XYL_SRV 0x130c #define BT_MESH_MODEL_ID_LIGHT_XYL_SETUP_SRV 0x130d #define BT_MESH_MODEL_ID_LIGHT_XYL_CLI 0x130e #define BT_MESH_MODEL_ID_LIGHT_LC_SRV 0x130f #define BT_MESH_MODEL_ID_LIGHT_LC_SETUPSRV 0x1310 #define BT_MESH_MODEL_ID_LIGHT_LC_CLI 0x1311 /** Message sending context. */ struct bt_mesh_msg_ctx { /** NetKey Index of the subnet to send the message on. */ uint16_t net_idx; /** AppKey Index to encrypt the message with. */ uint16_t app_idx; /** Remote address. */ uint16_t addr; /** Destination address of a received message. Not used for sending. */ uint16_t recv_dst; /** RSSI of received packet. Not used for sending. */ int8_t recv_rssi; /** Received TTL value. Not used for sending. */ uint8_t recv_ttl; /** Force sending reliably by using segment acknowledgement */ bool send_rel; /** TTL, or BT_MESH_TTL_DEFAULT for default TTL. */ uint8_t send_ttl; }; struct bt_mesh_model_op { /* OpCode encoded using the BT_MESH_MODEL_OP_* macros */ const uint32_t opcode; /* Minimum required message length */ const size_t min_len; /* Message handler for the opcode */ void (*const func)(struct bt_mesh_model *model, struct bt_mesh_msg_ctx *ctx, struct os_mbuf *buf); }; #define BT_MESH_MODEL_OP_1(b0) (b0) #define BT_MESH_MODEL_OP_2(b0, b1) (((b0) << 8) | (b1)) #define BT_MESH_MODEL_OP_3(b0, cid) ((((b0) << 16) | 0xc00000) | (cid)) #define BT_MESH_MODEL_OP_END { 0, 0, NULL } #define BT_MESH_MODEL_NO_OPS ((struct bt_mesh_model_op []) \ { BT_MESH_MODEL_OP_END }) /** Helper to define an empty model array */ #define BT_MESH_MODEL_NONE ((struct bt_mesh_model []){}) /** Length of a short Mesh MIC. */ #define BT_MESH_MIC_SHORT 4 /** Length of a long Mesh MIC. */ #define BT_MESH_MIC_LONG 8 /** @def BT_MESH_MODEL_OP_LEN * * @brief Helper to determine the length of an opcode. * * @param _op Opcode. */ #define BT_MESH_MODEL_OP_LEN(_op) ((_op) <= 0xff ? 1 : (_op) <= 0xffff ? 2 : 3) /** @def BT_MESH_MODEL_BUF_LEN * * @brief Helper for model message buffer length. * * Returns the length of a Mesh model message buffer, including the opcode * length and a short MIC. * * @param _op Opcode of the message. * @param _payload_len Length of the model payload. */ #define BT_MESH_MODEL_BUF_LEN(_op, _payload_len) \ (BT_MESH_MODEL_OP_LEN(_op) + (_payload_len) + BT_MESH_MIC_SHORT) /** @def BT_MESH_MODEL_BUF_LEN_LONG_MIC * * @brief Helper for model message buffer length. * * Returns the length of a Mesh model message buffer, including the opcode * length and a long MIC. * * @param _op Opcode of the message. * @param _payload_len Length of the model payload. */ #define BT_MESH_MODEL_BUF_LEN_LONG_MIC(_op, _payload_len) \ (BT_MESH_MODEL_OP_LEN(_op) + (_payload_len) + BT_MESH_MIC_LONG) /** @def BT_MESH_MODEL_BUF_DEFINE * * @brief Define a Mesh model message buffer using @ref NET_BUF_SIMPLE. * * @param _op Opcode of the message. * @param _payload_len Length of the model message payload. */ #define BT_MESH_MODEL_BUF(_op, _payload_len) \ NET_BUF_SIMPLE(BT_MESH_MODEL_BUF_LEN(_op, (_payload_len))) /** @def BT_MESH_MODEL_CB * * @brief Composition data SIG model entry with callback functions. * * @param _id Model ID. * @param _op Array of model opcode handlers. * @param _pub Model publish parameters. * @param _user_data User data for the model. * @param _cb Callback structure, or NULL to keep no callbacks. */ #define BT_MESH_MODEL_CB(_id, _op, _pub, _user_data, _cb) \ { \ .id = (_id), \ .op = _op, \ .keys = { [0 ... (CONFIG_BT_MESH_MODEL_KEY_COUNT - 1)] = \ BT_MESH_KEY_UNUSED }, \ .pub = _pub, \ .groups = { [0 ... (CONFIG_BT_MESH_MODEL_GROUP_COUNT - 1)] = \ BT_MESH_ADDR_UNASSIGNED }, \ .user_data = _user_data, \ .cb = _cb, \ } /** @def BT_MESH_MODEL_VND_CB * * @brief Composition data vendor model entry with callback functions. * * @param _company Company ID. * @param _id Model ID. * @param _op Array of model opcode handlers. * @param _pub Model publish parameters. * @param _user_data User data for the model. * @param _cb Callback structure, or NULL to keep no callbacks. */ #define BT_MESH_MODEL_VND_CB(_company, _id, _op, _pub, _user_data, _cb) \ { \ .vnd.company = (_company), \ .vnd.id = (_id), \ .op = _op, \ .pub = _pub, \ .keys = { [0 ... (CONFIG_BT_MESH_MODEL_KEY_COUNT - 1)] = \ BT_MESH_KEY_UNUSED }, \ .groups = { [0 ... (CONFIG_BT_MESH_MODEL_GROUP_COUNT - 1)] = \ BT_MESH_ADDR_UNASSIGNED }, \ .user_data = _user_data, \ .cb = _cb, \ } /** @def BT_MESH_MODEL * * @brief Composition data SIG model entry. * * @param _id Model ID. * @param _op Array of model opcode handlers. * @param _pub Model publish parameters. * @param _user_data User data for the model. */ #define BT_MESH_MODEL(_id, _op, _pub, _user_data) \ BT_MESH_MODEL_CB(_id, _op, _pub, _user_data, NULL) /** @def BT_MESH_MODEL_VND * * @brief Composition data vendor model entry. * * @param _company Company ID. * @param _id Model ID. * @param _op Array of model opcode handlers. * @param _pub Model publish parameters. * @param _user_data User data for the model. */ #define BT_MESH_MODEL_VND(_company, _id, _op, _pub, _user_data) \ BT_MESH_MODEL_VND_CB(_company, _id, _op, _pub, _user_data, NULL) /** @def BT_MESH_TRANSMIT * * @brief Encode transmission count & interval steps. * * @param count Number of retransmissions (first transmission is excluded). * @param int_ms Interval steps in milliseconds. Must be greater than 0, * less than or equal to 320, and a multiple of 10. * * @return Mesh transmit value that can be used e.g. for the default * values of the configuration model data. */ #define BT_MESH_TRANSMIT(count, int_ms) ((count) | (((int_ms / 10) - 1) << 3)) /** @def BT_MESH_TRANSMIT_COUNT * * @brief Decode transmit count from a transmit value. * * @param transmit Encoded transmit count & interval value. * * @return Transmission count (actual transmissions is N + 1). */ #define BT_MESH_TRANSMIT_COUNT(transmit) (((transmit) & (uint8_t)BIT_MASK(3))) /** @def BT_MESH_TRANSMIT_INT * * @brief Decode transmit interval from a transmit value. * * @param transmit Encoded transmit count & interval value. * * @return Transmission interval in milliseconds. */ #define BT_MESH_TRANSMIT_INT(transmit) ((((transmit) >> 3) + 1) * 10) /** @def BT_MESH_PUB_TRANSMIT * * @brief Encode Publish Retransmit count & interval steps. * * @param count Number of retransmissions (first transmission is excluded). * @param int_ms Interval steps in milliseconds. Must be greater than 0 * and a multiple of 50. * * @return Mesh transmit value that can be used e.g. for the default * values of the configuration model data. */ #define BT_MESH_PUB_TRANSMIT(count, int_ms) BT_MESH_TRANSMIT(count, \ (int_ms) / 5) /** @def BT_MESH_PUB_TRANSMIT_COUNT * * @brief Decode Pubhlish Retransmit count from a given value. * * @param transmit Encoded Publish Retransmit count & interval value. * * @return Retransmission count (actual transmissions is N + 1). */ #define BT_MESH_PUB_TRANSMIT_COUNT(transmit) BT_MESH_TRANSMIT_COUNT(transmit) /** @def BT_MESH_PUB_TRANSMIT_INT * * @brief Decode Publish Retransmit interval from a given value. * * @param transmit Encoded Publish Retransmit count & interval value. * * @return Transmission interval in milliseconds. */ #define BT_MESH_PUB_TRANSMIT_INT(transmit) ((((transmit) >> 3) + 1) * 50) /** Model publication context. */ struct bt_mesh_model_pub { /** The model the context belongs to. Initialized by the stack. */ struct bt_mesh_model *mod; uint16_t addr; /**< Publish Address. */ uint16_t key; /**< Publish AppKey Index. */ uint8_t ttl; /**< Publish Time to Live. */ uint8_t retransmit; /**< Retransmit Count & Interval Steps. */ uint8_t period; /**< Publish Period. */ uint8_t period_div:4, /**< Divisor for the Period. */ cred:1, /**< Friendship Credentials Flag. */ send_rel:1, fast_period:1,/**< Use FastPeriodDivisor */ count:3; /**< Retransmissions left. */ uint32_t period_start; /**< Start of the current period. */ /** @brief Publication buffer, containing the publication message. * * The application is expected to initialize this with * a valid os_mbuf pointer, with the help of e.g. * the NET_BUF_SIMPLE() macro. The publication buffer must * contain a valid publication message before calling the * bt_mesh_model_publish() API or after the publication's * @ref bt_mesh_model_pub.update callback has been called * and returned success. The buffer must be created outside * of function context, i.e. it must not be on the stack. * This is most conveniently acheived by creating it inline * when declaring the publication context: * * static struct bt_mesh_model_pub my_pub = { * .msg = NET_BUF_SIMPLE(size), * }; */ struct os_mbuf *msg; /** @brief Callback for updating the publication buffer. * * When set to NULL, the model is assumed not to support * periodic publishing. When set to non-NULL the callback * will be called periodically and is expected to update * @ref bt_mesh_model_pub.msg with a valid publication * message. * * If the callback returns non-zero, the publication is skipped * and will resume on the next periodic publishing interval. * * * @param mod The Model the Publication Context belogs to. * * @return Zero on success or (negative) error code otherwise. */ int (*update)(struct bt_mesh_model *mod); /** Publish Period Timer. Only for stack-internal use. */ struct k_delayed_work timer; }; /** Model callback functions. */ struct bt_mesh_model_cb { /** @brief Set value handler of user data tied to the model. * * @sa settings_handler::h_set * * @param model Model to set the persistent data of. * @param name Name/key of the settings item. * @param val Data from the backend. * * @return 0 on success, error otherwise. */ int (*const settings_set)(struct bt_mesh_model *model, const char *name, char *val); /** @brief Callback called when the mesh is started. * * This handler gets called after the node has been provisioned, or * after all mesh data has been loaded from persistent storage. * * @sa settings_handler::h_commit * * @param model Model this callback belongs to. * * @return 0 on success, error otherwise. */ int (*const start)(struct bt_mesh_model *model); /** @brief Model init callback. * * Called on every model instance during mesh initialization. * * * If any of the model init callbacks return an error, the Mesh * subsystem initialization will be aborted, and the error will be * returned to the caller of @ref bt_mesh_init. * * @param model Model to be initialized. * * @return 0 on success, error otherwise. */ int (*const init)(struct bt_mesh_model *model); /** @brief Model reset callback. * * Called when the mesh node is reset. All model data is deleted on * reset, and the model should clear its state. * * @note If the model stores any persistent data, this needs to be * erased manually. * * @param model Model this callback belongs to. */ void (*const reset)(struct bt_mesh_model *model); }; /** Abstraction that describes a Mesh Model instance */ struct bt_mesh_model { union { const uint16_t id; struct { uint16_t company; uint16_t id; } vnd; }; /* Internal information, mainly for persistent storage */ uint8_t elem_idx; /* Belongs to Nth element */ uint8_t mod_idx; /* Is the Nth model in the element */ uint16_t flags; /* Model flags for internal bookkeeping */ /* Model Publication */ struct bt_mesh_model_pub * const pub; /* AppKey List */ uint16_t keys[CONFIG_BT_MESH_MODEL_KEY_COUNT]; /* Subscription List (group or virtual addresses) */ uint16_t groups[CONFIG_BT_MESH_MODEL_GROUP_COUNT]; const struct bt_mesh_model_op * const op; /* Model callback structure. */ const struct bt_mesh_model_cb * const cb; #if MYNEWT_VAL(BLE_MESH_MODEL_EXTENSIONS) /* Pointer to the next model in a model extension tree. */ struct bt_mesh_model *next; /* Pointer to the first model this model extends. */ struct bt_mesh_model *extends; #endif /* Model-specific user data */ void *user_data; }; struct bt_mesh_send_cb { void (*start)(uint16_t duration, int err, void *cb_data); void (*end)(int err, void *cb_data); }; void bt_mesh_model_msg_init(struct os_mbuf *msg, uint32_t opcode); /** Special TTL value to request using configured default TTL */ #define BT_MESH_TTL_DEFAULT 0xff /** Maximum allowed TTL value */ #define BT_MESH_TTL_MAX 0x7f /** * @brief Send an Access Layer message. * * @param model Mesh (client) Model that the message belongs to. * @param ctx Message context, includes keys, TTL, etc. * @param msg Access Layer payload (the actual message to be sent). * @param cb Optional "message sent" callback. * @param cb_data User data to be passed to the callback. * * @return 0 on success, or (negative) error code on failure. */ int bt_mesh_model_send(struct bt_mesh_model *model, struct bt_mesh_msg_ctx *ctx, struct os_mbuf *msg, const struct bt_mesh_send_cb *cb, void *cb_data); /** * @brief Send a model publication message. * * Before calling this function, the user needs to ensure that the model * publication message (@ref bt_mesh_model_pub.msg) contains a valid * message to be sent. Note that this API is only to be used for * non-period publishing. For periodic publishing the app only needs * to make sure that @ref bt_mesh_model_pub.msg contains a valid message * whenever the @ref bt_mesh_model_pub.update callback is called. * * @param model Mesh (client) Model that's publishing the message. * * @return 0 on success, or (negative) error code on failure. */ int bt_mesh_model_publish(struct bt_mesh_model *model); /** * @brief Get the element that a model belongs to. * * @param mod Mesh model. * * @return Pointer to the element that the given model belongs to. */ struct bt_mesh_elem *bt_mesh_model_elem(struct bt_mesh_model *mod); /** @brief Find a SIG model. * * @param elem Element to search for the model in. * @param id Model ID of the model. * * @return A pointer to the Mesh model matching the given parameters, or NULL * if no SIG model with the given ID exists in the given element. */ struct bt_mesh_model *bt_mesh_model_find(const struct bt_mesh_elem *elem, uint16_t id); /** @brief Find a vendor model. * * @param elem Element to search for the model in. * @param company Company ID of the model. * @param id Model ID of the model. * * @return A pointer to the Mesh model matching the given parameters, or NULL * if no vendor model with the given ID exists in the given element. */ struct bt_mesh_model *bt_mesh_model_find_vnd(const struct bt_mesh_elem *elem, uint16_t company, uint16_t id); /** @brief Get whether the model is in the primary element of the device. * * @param mod Mesh model. * * @return true if the model is on the primary element, false otherwise. */ static inline bool bt_mesh_model_in_primary(const struct bt_mesh_model *mod) { return (mod->elem_idx == 0); } /** @brief Immediately store the model's user data in persistent storage. * * @param mod Mesh model. * @param vnd This is a vendor model. * @param name Name/key of the settings item. * @param data Model data to store, or NULL to delete any model data. * @param data_len Length of the model data. * * @return 0 on success, or (negative) error code on failure. */ int bt_mesh_model_data_store(struct bt_mesh_model *mod, bool vnd, const char *name, const void *data, size_t data_len); /** @brief Let a model extend another. * * Mesh models may be extended to reuse their functionality, forming a more * complex model. A Mesh model may extend any number of models, in any element. * The extensions may also be nested, ie a model that extends another may itself * be extended. Extensions may not be cyclical, and a model can only be extended * by one other model. * * A set of models that extend each other form a model extension tree. * * All models in an extension tree share one subscription list per element. The * access layer will utilize the combined subscription list of all models in an * extension tree and element, giving the models extended subscription list * capacity. * * @param[in] mod Mesh model. * @param[in] base_mod The model being extended. * * @retval 0 Successfully extended the base_mod model. * @retval -EALREADY The base_mod model is already extended. */ int bt_mesh_model_extend(struct bt_mesh_model *mod, struct bt_mesh_model *base_mod); /** Node Composition */ struct bt_mesh_comp { uint16_t cid; uint16_t pid; uint16_t vid; size_t elem_count; struct bt_mesh_elem *elem; }; #ifdef __cplusplus } #endif /** * @} */ #endif /* __BT_MESH_ACCESS_H */