inst.h

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/*
 * Copyright (c) 2024 Croxel, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_BLUETOOTH_SERVICES_NUS_INST_H_
#define ZEPHYR_INCLUDE_BLUETOOTH_SERVICES_NUS_INST_H_
 
#include <zephyr/bluetooth/gatt.h>
#include <zephyr/sys/iterable_sections.h>
#include <zephyr/sys/slist.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct bt_nus_inst {
        const struct bt_gatt_service_static *svc;

        sys_slist_t *cbs;
};
 
#define BT_UUID_NUS_SERVICE BT_UUID_DECLARE_128(BT_UUID_NUS_SRV_VAL)
#define BT_UUID_NUS_TX_CHAR BT_UUID_DECLARE_128(BT_UUID_NUS_TX_CHAR_VAL)
#define BT_UUID_NUS_RX_CHAR BT_UUID_DECLARE_128(BT_UUID_NUS_RX_CHAR_VAL)

#define BT_NUS_PERM_WRITE                                                                          \
        COND_CODE_1(IS_ENABLED(CONFIG_BT_ZEPHYR_NUS_SECURITY_AUTHEN), (BT_GATT_PERM_WRITE_AUTHEN), \
                    (COND_CODE_1(IS_ENABLED(CONFIG_BT_ZEPHYR_NUS_SECURITY_ENCRYPT),                \
                                 (BT_GATT_PERM_WRITE_ENCRYPT), (BT_GATT_PERM_WRITE))))

#define BT_NUS_PERM_NOTIFY                                                                         \
        COND_CODE_1(IS_ENABLED(CONFIG_BT_ZEPHYR_NUS_SECURITY_AUTHEN), (BT_GATT_PERM_READ_AUTHEN),  \
                    (COND_CODE_1(IS_ENABLED(CONFIG_BT_ZEPHYR_NUS_SECURITY_ENCRYPT),                \
                                 (BT_GATT_PERM_READ_ENCRYPT), (BT_GATT_PERM_NONE))))

ssize_t nus_bt_chr_write(struct bt_conn *conn, const struct bt_gatt_attr *attr,
        const void *buf, uint16_t len, uint16_t offset, uint8_t flags);
void nus_ccc_cfg_changed(const struct bt_gatt_attr *attr, uint16_t value);
 
#define Z_INTERNAL_BT_NUS_INST_DEFINE(_name)                                                       \
                                                                                                   \
BT_GATT_SERVICE_DEFINE(_name##_svc,                                                                \
        BT_GATT_PRIMARY_SERVICE(BT_UUID_NUS_SERVICE),                                              \
        BT_GATT_CHARACTERISTIC(BT_UUID_NUS_TX_CHAR,                                                \
                BT_GATT_CHRC_NOTIFY,                                                               \
                BT_NUS_PERM_NOTIFY,                                                                \
                NULL, NULL, NULL),                                                                 \
        BT_GATT_CCC(nus_ccc_cfg_changed,                                                           \
                BT_GATT_PERM_READ | BT_NUS_PERM_NOTIFY |                                           \
                BT_NUS_PERM_WRITE),                                                                \
        BT_GATT_CHARACTERISTIC(BT_UUID_NUS_RX_CHAR,                                                \
                BT_GATT_CHRC_WRITE |                                                               \
                BT_GATT_CHRC_WRITE_WITHOUT_RESP,                                                   \
                BT_NUS_PERM_WRITE,                                                                 \
                NULL, nus_bt_chr_write, NULL),                                                     \
);                                                                                                 \
                                                                                                   \
sys_slist_t _name##_cbs = SYS_SLIST_STATIC_INIT(&_name##_cbs);                                     \
                                                                                                   \
STRUCT_SECTION_ITERABLE(bt_nus_inst, _name) = {                                                    \
        .svc = &_name##_svc,                                                                       \
        .cbs = &_name##_cbs,                                                                       \
}
 
#ifdef __cplusplus
}
#endif
 
#endif /* ZEPHYR_INCLUDE_BLUETOOTH_SERVICES_NUS_INST_H_ */