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 10## Changes September 2018 11 12### Fixed 13- HCI/L2CAP: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 14- RFCOMM: Trigger l2cap request to send on rfcomm credits when client is waiting to sendtrigger l2cap request to send on rfcomm credits when client is waiting to send 15- L2CAP: Evaluate 'can send now' on HCI Disconnect as ACL buffers in Bluetooth Controller have been used for the closed connection are freed implicitly 16- GATT Client: stop timer on disconnect - fixes use after free / crash 17- L2CAP: Use valid signaling identifier for L2CAP Connection Parameter Update Request 18 19### Added 20- A2DP Source: Support stream reconfiguration (a2dp_source_reconfigure_stream_sampling_frequency) 21 22## Changes August 2018 23 24### Added 25- PBAP: added pbap_get_phonebook_size() to get phonebook entry count 26 27### Fixed 28- GATT Server: Allow enable Notifications/Indication with Write Command. Fixes issue with some Android devices. 29- SM: fix pairing for Secure Connections with Bonding if remote sends additional keys 30- SM: drop LTK flag from Pairing Response for Secure Connections 31- L2CAP: fix emitted L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 32 33## Changes June 2018 34 35### Added 36- btstack_audio.h: application level API for audio playback and recording 37- embedded/hal_audio.h: low-level API for audio playback and recording 38- HID Device: hid_device_connect(..) function 39- ESP32: implement hal_audio 40- DA14585: support for Dialog Semiconductor DA14585 LE-only controller 41- Rasperry Pi 3 + Raspberry Pi Zero W port in port/raspi 42 43### Changed 44- Errata 10734: 45 - SM: Generate new EC Public Keypair after each pairing 46 - SM: Abort failure with DHKEY_CHECK_FAILED if received public key is invalid (instead of unspecified error) 47- btstack.h: only include classic headers if ENABLE_CLASSIC is defined 48- windows: ignore virtual Bluetooth adapter provided by VMware 49- Replaced HCI_PACKET_BUFFER_SIZE with HCI_INCOMING_PACKET_BUFFER_SIZE and HCI_OUTGOING_PACKET_BUFFER_SIZE 50 51## Changes June 2018 52 53### Fixed 54- HFP: Fix Wide Band Speech bit in SDP record for both HF/AG. Missing bit prevents macOS from using mSBC 55- ATT Server: send ATT_EVENT_HANDLE_VALUE_INDICATION_COMPLETE with status ATT_HANDLE_VALUE_INDICATION_DISCONNECT on disconnect 56- AVRCP Controller: fix parsing of now playing info 57 58### Changed 59- ATT Server: ATT_HANDLE_VALUE_INDICATION_DISCONNECT is delivered to service handler if registered 60 61### Added 62- ATT Server: packet handler field added to att_service_handler_t to receive: connect/disconnect, atu exchange, indication complete 63 64## Changes May 2018 65 66### Added 67- GAP: re-encrypt outgoing connection if bonded 68- ATT Server: wait until re-encryption is complete 69- GATT Client: wait until re-encryption is complete 70- ATT Server: added att_server_request_to_send_notification and att_server_request_to_send_indication 71- GATT Client: if ENABLE_GATT_CLIENT_PAIRING, GATT Client starts pairing and retry operation on security error 72 73### Changed 74- ATT Server: att_server_register_can_send_now_callback is deprecated, use att_server_request_to_send_notification/indication instead 75 76### Fixed 77- SM: Fix LE Secure Connection pairing in Central role 78- le_device_db_tlv: fix seq nr management 79- SM: improve le_device_db lookup and storing of IRK 80- GATT Server: fix lookup for Client Characteristic Configuration in services with multiple Characteristics 81- RFCOMM: emit channel closed on HCI/L2CAP disconnect after sending DISC while expecting UA 82 83## Changes April 2018 84 85### Added 86- Crypto: btstack_crypo.h provides cryptographic functions for random data generation, AES128, EEC, CBC-MAC (Mesh) 87- SM: support pairing using Out-of-Band (OOB) data with LE Secure Connections 88- Embedded: support btstack_stdin via SEGGER RTT 89 90### Changed 91- att_db_util: added security requirement arguments to characteristic creators 92- SM: use btstack_crypto for cryptographpic functions 93- GAP: security level for Classic protocols (asides SDP) raised to 2 (encryption) 94 95### Fixed 96- HFP: fix answer call command 97- HCI: fix buffer overrun in gap_inquiry_explode 98- SDP: free service record item on sdp_unregister_service 99 100## Changes March 2018 101 102### Added 103- GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections 104- ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c 105- ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated 106 107### Fixed 108- RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1) 109- HSP HS: accept incomming SCO connection 110- SM: fix iteration over LE Device DB entries for bonding and address resolving 111- SM: store pairing information only if both devices have requested bonding 112 113## Changes February 2018 114 115### Added 116- GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE 117- SM: new event SM_EVENT_PAIRING_COMPLETE 118- GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done 119- GAP: add gap_delete_all_link_keys 120 121### Changed 122- GATT Client: round robin for multiple connections 123- ATT Dispatch: round robin for ATT Server & GATT Client 124- L2CAP: round robin for all L2CAP channels (fixed and dynamic) 125- btstack_link_key_db: addition functions for link key iteration 126- GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up 127- CSR: set all keys in psram instead of default 128 129### Fixed 130- tc3556x: fix startup after baud rate change 131 132 133## Changes January 2018 134 135### Added 136- Port for Windows with Zephyr HCI Firmware connected via serial port 137- em9304: upload patch containers during HCI bootup 138- Makefile for STM32-F4Discovery port 139- support for console out via SEGGER RTT 140- LE Data Channels example in BTstack and [https://github.com/bluekitchen/CBL2CAPChannel-Demo](iOS example on GitHub) 141- LE Streamer Client can send as fast as possbile as well 142- L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu 143 144### Changed 145- HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave) 146- GAP: gap_set_connection_parameters includes scan interval and window params 147- GATT Client: GATT_EVENT_MTU indicates max MTU 148- ATT DB Util: attribute handle is returned for new Services and Characteristics 149 150### Fixed 151- Windows: retry serial port operations if not all bytes have been read/written 152- HFP: avoid buffer overflows setting up messages 153- SBC Decoder: improved error handling for invalid SBC audio data 154- GAP: fix Connection Parameter Response in Central role 155- ATT DB Util: update pointer to database in case of realloc 156- GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128 157- GAP: release HCI Connnection after gap_le_conne 158- ATT: Exchanged MTU is propagate to ATT Server and GATT Client 159 160 161## Changes December 2017 162 163### Added 164- Introduced btstack_network.h network interface abstraction 165- btstack_network_posix implementation using Linux tun/tap interface 166- WICED: support for btstack_stdin (HAVE_STDIN) 167- 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. 168- TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h) 169- TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c 170- LE Device DB TLV: overwrite oldest entry if no free entries available 171- SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role 172- Example/hid_host_demo with HID parser and support for basic US keyboard layout 173- 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 174- Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304) 175 176### Changed 177- panu_demo: uses btstack_network.h now 178- WICED: configure printf to replace Linefeed with CRLF 179- SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations 180 181### Fixed 182- RFCOMM: support connection requests during connection failure 183- L2CAP: support connection requests during connection failure 184- L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU) 185- HCI: avoid double free during halting 186- SM: fixed reconnect using legacy pairing in slave role 187 188 189