btstack/CHANGELOG.md

Change Log

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

[Unreleased]

Added

• Crypto: btstack_crypo.h provides cryptographic functions for random data generation, AES128, EEC, CBC-MAC (Mesh)
• SM: support pairing using Out-of-Band (OOB) data with LE Secure Connections
• Embedded: support btstack_stdin via SEGGER RTT

Changed

• att_db_util: added security requirement arguments to characteristic creators
• SM: use btstack_crypto for cryptographpic functions
• GAP: security level for Classic protocols (asides SDP) raised to 2 (encryption)

Fixed

• HFP: fix answer call command
• HCI: fix buffer overrun in gap_inquiry_explode
• SDP: free service record item on sdp_unregister_service

Changes March 2018

Added

• GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections
• ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c
• ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated

Fixed

• RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1)
• HSP HS: accept incomming SCO connection
• SM: fix iteration over LE Device DB entries for bonding and address resolving
• SM: store pairing information only if both devices have requested bonding

Changes February 2018

Added

• GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE
• SM: new event SM_EVENT_PAIRING_COMPLETE
• GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done
• GAP: add gap_delete_all_link_keys

Changed

• GATT Client: round robin for multiple connections
• ATT Dispatch: round robin for ATT Server & GATT Client
• L2CAP: round robin for all L2CAP channels (fixed and dynamic)
• btstack_link_key_db: addition functions for link key iteration
• GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up
• CSR: set all keys in psram instead of default

Fixed

• tc3556x: fix startup after baud rate change

Changes January 2018

Added

• Port for Windows with Zephyr HCI Firmware connected via serial port
• em9304: upload patch containers during HCI bootup
• Makefile for STM32-F4Discovery port
• support for console out via SEGGER RTT
• LE Data Channels example in BTstack and [https://github.com/bluekitchen/CBL2CAPChannel-Demo](iOS example on GitHub)
• LE Streamer Client can send as fast as possbile as well
• L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu

Changed

• HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave)
• GAP: gap_set_connection_parameters includes scan interval and window params
• GATT Client: GATT_EVENT_MTU indicates max MTU
• ATT DB Util: attribute handle is returned for new Services and Characteristics

Fixed

• Windows: retry serial port operations if not all bytes have been read/written
• HFP: avoid buffer overflows setting up messages
• SBC Decoder: improved error handling for invalid SBC audio data
• GAP: fix Connection Parameter Response in Central role
• ATT DB Util: update pointer to database in case of realloc
• GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128
• GAP: release HCI Connnection after gap_le_conne
• ATT: Exchanged MTU is propagate to ATT Server and GATT Client

Changes December 2017

Added

• Introduced btstack_network.h network interface abstraction
• btstack_network_posix implementation using Linux tun/tap interface
• WICED: support for btstack_stdin (HAVE_STDIN)
• GATT Server: Writes to GATT Client Characteristic Configuration are stored in TLV and restored on reconnect. The db.h file generated from db.gatt needs to be re-created.
• TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h)
• TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c
• LE Device DB TLV: overwrite oldest entry if no free entries available
• SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role
• Example/hid_host_demo with HID parser and support for basic US keyboard layout
• EM9304: custom HCI Transport implementation for EM9304 on top of btstack_em9304_spi.h platform abstraction only requires hal_em9304_spi.h to be implemented for new ports
• Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304)

Changed

• panu_demo: uses btstack_network.h now
• WICED: configure printf to replace Linefeed with CRLF
• SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations

Fixed

• RFCOMM: support connection requests during connection failure
• L2CAP: support connection requests during connection failure
• L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU)
• HCI: avoid double free during halting
• SM: fixed reconnect using legacy pairing in slave role