/** @file
 *  @brief Attribute Protocol handling.
 */

/*
 * Copyright (c) 2016 Intel Corporation
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#ifndef __BT_ATT_H
#define __BT_ATT_H

#ifdef __cplusplus
extern "C" {
#endif

#include <misc/slist.h>

/* Error codes for Error response PDU */
#define BT_ATT_ERR_INVALID_HANDLE		0x01
#define BT_ATT_ERR_READ_NOT_PERMITTED		0x02
#define BT_ATT_ERR_WRITE_NOT_PERMITTED		0x03
#define BT_ATT_ERR_INVALID_PDU			0x04
#define BT_ATT_ERR_AUTHENTICATION		0x05
#define BT_ATT_ERR_NOT_SUPPORTED		0x06
#define BT_ATT_ERR_INVALID_OFFSET		0x07
#define BT_ATT_ERR_AUTHORIZATION		0x08
#define BT_ATT_ERR_PREPARE_QUEUE_FULL		0x09
#define BT_ATT_ERR_ATTRIBUTE_NOT_FOUND		0x0a
#define BT_ATT_ERR_ATTRIBUTE_NOT_LONG		0x0b
#define BT_ATT_ERR_ENCRYPTION_KEY_SIZE		0x0c
#define BT_ATT_ERR_INVALID_ATTRIBUTE_LEN	0x0d
#define BT_ATT_ERR_UNLIKELY			0x0e
#define BT_ATT_ERR_INSUFFICIENT_ENCRYPTION	0x0f
#define BT_ATT_ERR_UNSUPPORTED_GROUP_TYPE	0x10
#define BT_ATT_ERR_INSUFFICIENT_RESOURCES	0x11

/* Common Profile Error Codes (from CSS) */
#define BT_ATT_ERR_WRITE_REQ_REJECTED		0xfc
#define BT_ATT_ERR_CCC_IMPROPER_CONF		0xfd
#define BT_ATT_ERR_PROCEDURE_IN_PROGRESS	0xfe
#define BT_ATT_ERR_OUT_OF_RANGE			0xff

typedef void (*bt_att_func_t)(struct bt_conn *conn, uint8_t err,
			      const void *pdu, uint16_t length,
			      void *user_data);
typedef void (*bt_att_destroy_t)(void *user_data);

/* ATT request context */
struct bt_att_req {
	sys_snode_t node;
	bt_att_func_t func;
	bt_att_destroy_t destroy;
	struct net_buf_simple_state state;
	struct net_buf *buf;
#if defined(CONFIG_BLUETOOTH_SMP)
	bool retrying;
#endif /* CONFIG_BLUETOOTH_SMP */
};

#ifdef __cplusplus
}
#endif

#endif /* __BT_ATT_H */