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### Added 10- GAP: gap_le_connection_interval provides connection interval for conn handle 11- Nordic SPP Service Server: GATT service that emulates a serial port over BLE based on Nordic Semiconductor documentation. 12- uBlox SPP Service Server: GATT service that emulates a serial port over BLE based on uBlox documentation. 13- SM: ENABLE_LE_CENTRAL_AUTO_ENCRYPTION triggers automatic encryption on connect to bonded devices 14 15### Fixed 16- SM: prevent random address updates if gap_random_address_set was used 17- SM: fix internal buffer overrun that can cause storing of bonding information to fail 18- SM: ignore Slave Security Request after sending own Pairing Request 19- L2CAP: fix use after free on disconnect if ERTM is enabled 20- Memory Pools: clear all buffers before use 21 22## Changes October 2018 23 24### Added 25- SDP Server: queue incoming connections when already connected instead of rejecting them 26- GAP: Support enter/exit sniff mode via gap_sniff_mode_enter/exit. gap_set_default_link_policy_settings is needed to enable sniff mode in general. 27- HIDS Device: GATT service that exposes HID reports intended for HID Devices, like keyboard and mouse. 28 29### Fixed 30- HCI: fix bug in gap_inquiry_stop that triggered additional GAP_EVENT_INQUIRY_COMPLETE instead of stopping the inquiry 31- L2CAP: fix issue with outgoing connection before read remote supported complete when other channels exist 32- L2CAP ERTM: allow SDU of szie MPS in first packet that contains L2CAP SDU Length 33- L2CAP ERTM: fix memory corruption triggered if local_mtu > mps 34- L2CAP ERTM: fix outgoing fragment management 35- HFP: decline incoming RFCOMM connection after outgoing connection was started 36- AVRCP: fix crash on disconnect of connection established by remote 37 38## Changes September 2018 39 40### Fixed 41- HCI: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 42- L2CAP: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 43- L2CAP: Evaluate 'can send now' on HCI Disconnect as ACL buffers in Bluetooth Controller have been used for the closed connection are freed implicitly 44- L2CAP: Check can send now before sending extended information requeste needed for ERTM mode 45- L2CAP: Use valid signaling identifier for L2CAP Connection Parameter Update Request 46- 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 47- RFCOMM: Avoid use-after-free on channel finalize 48- GATT Client: stop timer on disconnect - fixes use after free / crash 49 50### Added 51- A2DP Source: Support stream reconfiguration (a2dp_source_reconfigure_stream_sampling_frequency) 52- 3rd-party: yxml is used for PBAP vCard list parsing 53- cc256xC: new v1.1 init scripts 54 55## Changes August 2018 56 57### Added 58- PBAP: added pbap_get_phonebook_size() to get phonebook entry count 59 60### Fixed 61- GATT Server: Allow enable Notifications/Indication with Write Command. Fixes issue with some Android devices. 62- SM: fix pairing for Secure Connections with Bonding if remote sends additional keys 63- SM: drop LTK flag from Pairing Response for Secure Connections 64- L2CAP: fix emitted L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 65 66## Changes June 2018 67 68### Added 69- btstack_audio.h: application level API for audio playback and recording 70- embedded/hal_audio.h: low-level API for audio playback and recording 71- HID Device: hid_device_connect(..) function 72- ESP32: implement hal_audio 73- DA14585: support for Dialog Semiconductor DA14585 LE-only controller 74- Rasperry Pi 3 + Raspberry Pi Zero W port in port/raspi 75 76### Changed 77- Errata 10734: 78 - SM: Generate new EC Public Keypair after each pairing 79 - SM: Abort failure with DHKEY_CHECK_FAILED if received public key is invalid (instead of unspecified error) 80- btstack.h: only include classic headers if ENABLE_CLASSIC is defined 81- windows: ignore virtual Bluetooth adapter provided by VMware 82- Replaced HCI_PACKET_BUFFER_SIZE with HCI_INCOMING_PACKET_BUFFER_SIZE and HCI_OUTGOING_PACKET_BUFFER_SIZE 83 84## Changes June 2018 85 86### Fixed 87- HFP: Fix Wide Band Speech bit in SDP record for both HF/AG. Missing bit prevents macOS from using mSBC 88- ATT Server: send ATT_EVENT_HANDLE_VALUE_INDICATION_COMPLETE with status ATT_HANDLE_VALUE_INDICATION_DISCONNECT on disconnect 89- AVRCP Controller: fix parsing of now playing info 90 91### Changed 92- ATT Server: ATT_HANDLE_VALUE_INDICATION_DISCONNECT is delivered to service handler if registered 93 94### Added 95- ATT Server: packet handler field added to att_service_handler_t to receive: connect/disconnect, atu exchange, indication complete 96 97## Changes May 2018 98 99### Added 100- GAP: re-encrypt outgoing connection if bonded 101- ATT Server: wait until re-encryption is complete 102- GATT Client: wait until re-encryption is complete 103- ATT Server: added att_server_request_to_send_notification and att_server_request_to_send_indication 104- GATT Client: if ENABLE_GATT_CLIENT_PAIRING, GATT Client starts pairing and retry operation on security error 105 106### Changed 107- ATT Server: att_server_register_can_send_now_callback is deprecated, use att_server_request_to_send_notification/indication instead 108 109### Fixed 110- SM: Fix LE Secure Connection pairing in Central role 111- le_device_db_tlv: fix seq nr management 112- SM: improve le_device_db lookup and storing of IRK 113- GATT Server: fix lookup for Client Characteristic Configuration in services with multiple Characteristics 114- RFCOMM: emit channel closed on HCI/L2CAP disconnect after sending DISC while expecting UA 115 116## Changes April 2018 117 118### Added 119- Crypto: btstack_crypo.h provides cryptographic functions for random data generation, AES128, EEC, CBC-MAC (Mesh) 120- SM: support pairing using Out-of-Band (OOB) data with LE Secure Connections 121- Embedded: support btstack_stdin via SEGGER RTT 122 123### Changed 124- att_db_util: added security requirement arguments to characteristic creators 125- SM: use btstack_crypto for cryptographpic functions 126- GAP: security level for Classic protocols (asides SDP) raised to 2 (encryption) 127 128### Fixed 129- HFP: fix answer call command 130- HCI: fix buffer overrun in gap_inquiry_explode 131- SDP: free service record item on sdp_unregister_service 132 133## Changes March 2018 134 135### Added 136- GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections 137- ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c 138- ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated 139 140### Fixed 141- RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1) 142- HSP HS: accept incomming SCO connection 143- SM: fix iteration over LE Device DB entries for bonding and address resolving 144- SM: store pairing information only if both devices have requested bonding 145 146## Changes February 2018 147 148### Added 149- GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE 150- SM: new event SM_EVENT_PAIRING_COMPLETE 151- GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done 152- GAP: add gap_delete_all_link_keys 153 154### Changed 155- GATT Client: round robin for multiple connections 156- ATT Dispatch: round robin for ATT Server & GATT Client 157- L2CAP: round robin for all L2CAP channels (fixed and dynamic) 158- btstack_link_key_db: addition functions for link key iteration 159- GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up 160- CSR: set all keys in psram instead of default 161 162### Fixed 163- tc3556x: fix startup after baud rate change 164 165 166## Changes January 2018 167 168### Added 169- Port for Windows with Zephyr HCI Firmware connected via serial port 170- em9304: upload patch containers during HCI bootup 171- Makefile for STM32-F4Discovery port 172- support for console out via SEGGER RTT 173- LE Data Channels example in BTstack and [https://github.com/bluekitchen/CBL2CAPChannel-Demo](iOS example on GitHub) 174- LE Streamer Client can send as fast as possbile as well 175- L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu 176 177### Changed 178- HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave) 179- GAP: gap_set_connection_parameters includes scan interval and window params 180- GATT Client: GATT_EVENT_MTU indicates max MTU 181- ATT DB Util: attribute handle is returned for new Services and Characteristics 182 183### Fixed 184- Windows: retry serial port operations if not all bytes have been read/written 185- HFP: avoid buffer overflows setting up messages 186- SBC Decoder: improved error handling for invalid SBC audio data 187- GAP: fix Connection Parameter Response in Central role 188- ATT DB Util: update pointer to database in case of realloc 189- GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128 190- GAP: release HCI Connnection after gap_le_conne 191- ATT: Exchanged MTU is propagate to ATT Server and GATT Client 192 193 194## Changes December 2017 195 196### Added 197- Introduced btstack_network.h network interface abstraction 198- btstack_network_posix implementation using Linux tun/tap interface 199- WICED: support for btstack_stdin (HAVE_STDIN) 200- 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. 201- TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h) 202- TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c 203- LE Device DB TLV: overwrite oldest entry if no free entries available 204- SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role 205- Example/hid_host_demo with HID parser and support for basic US keyboard layout 206- 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 207- Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304) 208 209### Changed 210- panu_demo: uses btstack_network.h now 211- WICED: configure printf to replace Linefeed with CRLF 212- SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations 213 214### Fixed 215- RFCOMM: support connection requests during connection failure 216- L2CAP: support connection requests during connection failure 217- L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU) 218- HCI: avoid double free during halting 219- SM: fixed reconnect using legacy pairing in slave role 220 221 222