92 lines
3.9 KiB
C
92 lines
3.9 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Dan Halbert for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef MICROPY_INCLUDED_ESPRESSIF_COMMON_HAL_BLEIO_BONDING_H
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#define MICROPY_INCLUDED_ESPRESSIF_COMMON_HAL_BLEIO_BONDING_H
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "common-hal/_bleio/__init__.h"
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#define EDIV_INVALID (0xffff)
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#define BONDING_DEBUG (1)
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#if BONDING_DEBUG
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#define BONDING_DEBUG_PRINTF(...) printf(__VA_ARGS__)
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#define BONDING_DEBUG_PRINT_BLOCK(block) bonding_print_block(block)
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#define BONDING_DEBUG_PRINT_KEYS(keys) bonding_print_keys(keys)
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#else
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#define BONDING_DEBUG_PRINTF(...)
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#define BONDING_DEBUG_PRINT_BLOCK(block)
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#define BONDING_DEBUG_PRINT_KEYS(keys)
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#endif
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// Bonding data is stored in variable-length blocks consecutively in
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// erased flash (all 1's). The blocks are 32-bit aligned, though the
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// data may be any number of bytes. We hop through the blocks using
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// the size field to find the next block. When we hit a word that is
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// all 1's, we have reached the end of the blocks. We can write a new
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// block there.
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typedef enum {
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BLOCK_INVALID = 0, // Ignore this block
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BLOCK_KEYS = 1, // Block contains bonding keys.
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BLOCK_SYS_ATTR = 2, // Block contains sys_attr values (CCCD settings, etc.).
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BLOCK_UNUSED = 0xff, // Initial erased value.
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} bonding_block_type_t;
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typedef struct {
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bool is_central : 1; // 1 if data is for a central role.
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uint16_t reserved : 7; // Not currently used
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bonding_block_type_t type : 8; // What kind of data is stored in.
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uint16_t ediv; // ediv value; used as a lookup key.
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uint16_t conn_handle; // Connection handle: used when a BLOCK_SYS_ATTR is queued to write.
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// Not used as a key, etc.
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uint16_t data_length; // Length of data in bytes, including ediv, not including padding.
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// End of block header. 32-bit boundary here.
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uint8_t data[]; // Rest of data in the block. Needs to be 32-bit aligned.
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// Block is padded to 32-bit alignment.
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} bonding_block_t;
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void bonding_background(void);
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void bonding_erase_storage(void);
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void bonding_reset(void);
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void bonding_clear_keys(bonding_keys_t *bonding_keys);
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bool bonding_load_cccd_info(bool is_central, uint16_t conn_handle, uint16_t ediv);
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bool bonding_load_keys(bool is_central, uint16_t ediv, bonding_keys_t *bonding_keys);
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const ble_gap_enc_key_t *bonding_load_peer_encryption_key(bool is_central, const ble_gap_addr_t *peer);
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size_t bonding_load_identities(bool is_central, const ble_gap_id_key_t **keys, size_t max_length);
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size_t bonding_peripheral_bond_count(void);
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#if BONDING_DEBUG
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void bonding_print_block(bonding_block_t *);
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void bonding_print_keys(bonding_keys_t *);
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#endif
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#endif // MICROPY_INCLUDED_ESPRESSIF_COMMON_HAL_BLEIO_BONDING_H
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