1# Change Log 2All notable changes to this project will be documented in this file. 3 4The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) 5and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html). 6 7## [Unreleased] 8 9### Changed 10- SM: Generate new EC Public Keypair after each pairing 11 12## Changes June 2018 13 14### Fixed 15- HFP: Fix Wide Band Speech bit in SDP record for both HF/AG. Missing bit prevents macOS from using mSBC 16- ATT Server: send ATT_EVENT_HANDLE_VALUE_INDICATION_COMPLETE with status ATT_HANDLE_VALUE_INDICATION_DISCONNECT on disconnect 17- AVRCP Controller: fix parsing of now playing info 18 19### Changed 20- ATT Server: ATT_HANDLE_VALUE_INDICATION_DISCONNECT is delivered to service handler if registered 21 22### Added 23- ATT Server: packet handler field added to att_service_handler_t to receive: connect/disconnect, atu exchange, indication complete 24 25## Changes May 2018 26 27### Added 28- GAP: re-encrypt outgoing connection if bonded 29- ATT Server: wait until re-encryption is complete 30- GATT Client: wait until re-encryption is complete 31- ATT Server: added att_server_request_to_send_notification and att_server_request_to_send_indication 32- GATT Client: if ENABLE_GATT_CLIENT_PAIRING, GATT Client starts pairing and retry operation on security error 33 34### Changed 35- ATT Server: att_server_register_can_send_now_callback is deprecated, use att_server_request_to_send_notification/indication instead 36 37### Fixed 38- SM: Fix LE Secure Connection pairing in Central role 39- le_device_db_tlv: fix seq nr management 40- SM: improve le_device_db lookup and storing of IRK 41- GATT Server: fix lookup for Client Characteristic Configuration in services with multiple Characteristics 42- RFCOMM: emit channel closed on HCI/L2CAP disconnect after sending DISC while expecting UA 43 44## Changes April 2018 45 46### Added 47- Crypto: btstack_crypo.h provides cryptographic functions for random data generation, AES128, EEC, CBC-MAC (Mesh) 48- SM: support pairing using Out-of-Band (OOB) data with LE Secure Connections 49- Embedded: support btstack_stdin via SEGGER RTT 50 51### Changed 52- att_db_util: added security requirement arguments to characteristic creators 53- SM: use btstack_crypto for cryptographpic functions 54- GAP: security level for Classic protocols (asides SDP) raised to 2 (encryption) 55 56### Fixed 57- HFP: fix answer call command 58- HCI: fix buffer overrun in gap_inquiry_explode 59- SDP: free service record item on sdp_unregister_service 60 61## Changes March 2018 62 63### Added 64- GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections 65- ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c 66- ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated 67 68### Fixed 69- RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1) 70- HSP HS: accept incomming SCO connection 71- SM: fix iteration over LE Device DB entries for bonding and address resolving 72- SM: store pairing information only if both devices have requested bonding 73 74## Changes February 2018 75 76### Added 77- GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE 78- SM: new event SM_EVENT_PAIRING_COMPLETE 79- GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done 80- GAP: add gap_delete_all_link_keys 81 82### Changed 83- GATT Client: round robin for multiple connections 84- ATT Dispatch: round robin for ATT Server & GATT Client 85- L2CAP: round robin for all L2CAP channels (fixed and dynamic) 86- btstack_link_key_db: addition functions for link key iteration 87- GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up 88- CSR: set all keys in psram instead of default 89 90### Fixed 91- tc3556x: fix startup after baud rate change 92 93 94## Changes January 2018 95 96### Added 97- Port for Windows with Zephyr HCI Firmware connected via serial port 98- em9304: upload patch containers during HCI bootup 99- Makefile for STM32-F4Discovery port 100- support for console out via SEGGER RTT 101- LE Data Channels example in BTstack and [https://github.com/bluekitchen/CBL2CAPChannel-Demo](iOS example on GitHub) 102- LE Streamer Client can send as fast as possbile as well 103- L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu 104 105### Changed 106- HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave) 107- GAP: gap_set_connection_parameters includes scan interval and window params 108- GATT Client: GATT_EVENT_MTU indicates max MTU 109- ATT DB Util: attribute handle is returned for new Services and Characteristics 110 111### Fixed 112- Windows: retry serial port operations if not all bytes have been read/written 113- HFP: avoid buffer overflows setting up messages 114- SBC Decoder: improved error handling for invalid SBC audio data 115- GAP: fix Connection Parameter Response in Central role 116- ATT DB Util: update pointer to database in case of realloc 117- GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128 118- GAP: release HCI Connnection after gap_le_conne 119- ATT: Exchanged MTU is propagate to ATT Server and GATT Client 120 121 122## Changes December 2017 123 124### Added 125- Introduced btstack_network.h network interface abstraction 126- btstack_network_posix implementation using Linux tun/tap interface 127- WICED: support for btstack_stdin (HAVE_STDIN) 128- 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. 129- TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h) 130- TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c 131- LE Device DB TLV: overwrite oldest entry if no free entries available 132- SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role 133- Example/hid_host_demo with HID parser and support for basic US keyboard layout 134- 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 135- Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304) 136 137### Changed 138- panu_demo: uses btstack_network.h now 139- WICED: configure printf to replace Linefeed with CRLF 140- SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations 141 142### Fixed 143- RFCOMM: support connection requests during connection failure 144- L2CAP: support connection requests during connection failure 145- L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU) 146- HCI: avoid double free during halting 147- SM: fixed reconnect using legacy pairing in slave role 148 149 150