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165 lines
6.4 KiB
C
165 lines
6.4 KiB
C
/*
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* Copyright (C) 2011-2012 by Matthias Ringwald
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* 4. Any redistribution, use, or modification is done solely for
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* personal benefit and not for any commercial purpose or for
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* monetary gain.
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*
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* THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
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* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Please inquire about commercial licensing options at btstack@ringwald.ch
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*
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*/
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#pragma once
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#include <stdint.h>
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// MARK: Attribute PDU Opcodes
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#define ATT_ERROR_RESPONSE 0x01
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#define ATT_EXCHANGE_MTU_REQUEST 0x02
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#define ATT_EXCHANGE_MTU_RESPONSE 0x03
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#define ATT_FIND_INFORMATION_REQUEST 0x04
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#define ATT_FIND_INFORMATION_REPLY 0x05
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#define ATT_FIND_BY_TYPE_VALUE_REQUEST 0x06
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#define ATT_FIND_BY_TYPE_VALUE_RESPONSE 0x07
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#define ATT_READ_BY_TYPE_REQUEST 0x08
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#define ATT_READ_BY_TYPE_RESPONSE 0x09
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#define ATT_READ_REQUEST 0x0a
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#define ATT_READ_RESPONSE 0x0b
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#define ATT_READ_BLOB_REQUEST 0x0c
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#define ATT_READ_BLOB_RESPONSE 0x0d
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#define ATT_READ_MULTIPLE_REQUEST 0x0e
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#define ATT_READ_MULTIPLE_RESPONSE 0x0f
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#define ATT_READ_BY_GROUP_TYPE_REQUEST 0x10
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#define ATT_READ_BY_GROUP_TYPE_RESPONSE 0x11
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#define ATT_WRITE_REQUEST 0x12
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#define ATT_WRITE_RESPONSE 0x13
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#define ATT_PREPARE_WRITE_REQUEST 0x16
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#define ATT_PREPARE_WRITE_RESPONSE 0x17
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#define ATT_EXECUTE_WRITE_REQUEST 0x18
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#define ATT_EXECUTE_WRITE_RESPONSE 0x19
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#define ATT_HANDLE_VALUE_NOTIFICATION 0x1b
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#define ATT_HANDLE_VALUE_CONFIRMATION 0x1c
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#define ATT_HANDLE_VALUE_INDICATION 0x1d
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#define ATT_WRITE_COMMAND 0x52
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#define ATT_SIGNED_WRITE_COMAND 0xD2
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// MARK: ATT Error Codes
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#define ATT_ERROR_ATTRIBUTE_INVALID 0x01
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#define ATT_ERROR_INVALID_OFFSET 0x07
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#define ATT_ERROR_ATTRIBUTE_NOT_FOUND 0x0a
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#define ATT_ERROR_UNSUPPORTED_GROUP_TYPE 0x10
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// MARK: Attribute Property Flags
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#define ATT_PROPERTY_BROADCAST 0x01
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#define ATT_PROPERTY_READ 0x02
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#define ATT_PROPERTY_WRITE_WITHOUT_RESPONSE 0x04
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#define ATT_PROPERTY_WRITE 0x08
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#define ATT_PROPERTY_NOTIFY 0x10
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#define ATT_PROPERTY_INDICATE 0x20
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#define ATT_PROPERTY_AUTHENTICATED_SIGNED_WRITE 0x40
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#define ATT_PROPERTY_EXTENDED_PROPERTIES 0x80
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// MARK: Attribute Property Flag, BTstack extension
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// value is asked from client
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#define ATT_PROPERTY_DYNAMIC 0x100
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// 128 bit UUID used
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#define ATT_PROPERTY_UUID128 0x200
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// MARK: GATT UUIDs
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#define GATT_PRIMARY_SERVICE_UUID 0x2800
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#define GATT_SECONDARY_SERVICE_UUID 0x2801
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#define GATT_CHARACTERISTICS_UUID 0x2803
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#define GAP_SERVICE_UUID 0x1800
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#define GAP_DEVICE_NAME_UUID 0x2a00
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#define ATT_TRANSACTION_MODE_NONE 0x0
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#define ATT_TRANSACTION_MODE_ACTIVE 0x1
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#define ATT_TRANSACTION_MODE_EXECUTE 0x2
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#define ATT_TRANSACTION_MODE_CANCEL 0x3
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typedef struct att_connection {
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uint16_t mtu;
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} att_connection_t;
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typedef uint8_t signature_t[12];
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// ATT Client Read Callback for Dynamic Data
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// - if buffer == NULL, don't copy data, just return size of value
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// - if buffer != NULL, copy data and return number bytes copied
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// @param offset defines start of attribute value
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typedef uint16_t (*att_read_callback_t)(uint16_t handle, uint16_t offset, uint8_t * buffer, uint16_t buffer_size);
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// ATT Client Write Callback for Dynamic Data
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// @param handle to be written
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// @param transaction - ATT_TRANSACTION_MODE_NONE for regular writes, ATT_TRANSACTION_MODE_ACTIVE for prepared writes and ATT_TRANSACTION_MODE_EXECUTE
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// @param offset into the value - used for queued writes and long attributes
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// @param buffer
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// @param buffer_size
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// @Param signature used for signed write commmands
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typedef void (*att_write_callback_t)(uint16_t handle, uint16_t transaction_mode, uint16_t offset, uint8_t *buffer, uint16_t buffer_size, signature_t * signature);
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// MARK: ATT Operations
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void att_set_db(uint8_t const * db);
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void att_set_read_callback(att_read_callback_t callback);
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void att_set_write_callback(att_write_callback_t callback);
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void att_dump_attributes(void);
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// response buffer size = att_connection->mtu
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uint16_t att_handle_request(att_connection_t * att_connection,
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uint8_t * request_buffer,
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uint16_t request_len,
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uint8_t * response_buffer);
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uint16_t att_prepare_handle_value_notification(att_connection_t * att_connection,
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uint16_t handle,
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uint8_t *value,
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uint16_t value_len,
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uint8_t * response_buffer);
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uint16_t att_prepare_handle_value_indication(att_connection_t * att_connection,
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uint16_t handle,
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uint8_t *value,
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uint16_t value_len,
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uint8_t * response_buffer);
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