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