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--- 8 9## Unreleased 10 11### Added 12- L2CAP: additional authorization_required param in l2cap_ecbm_register_service 13- GATT Client: support GATT over Enhanced LE Bearer 14- GATT Server: support GATT over Enhanced LE Bearer 15- A2DP: support SDP record without service name and/or provider 16- AVRCP: support SDP record without service name and/or provider 17- HFP: hfp_hf_create_sdp_record_with_codecs and hfp_hf_create_sdp_record_with_codecs 18- HFP: support SDP record without service name 19 HFP: support for LC3-SWB 20- SPP Server: support SDP record without service name 21- HOG Device: emit HIDS_SUBEVENT_SET_REPORT 22- HOG Device: provide report for GET REPORT operation via callback 23- SBC Codec: new interface allows for multiple instances 24- LE Device DB: le_device_db_dump dumps LTK 25- Port for Zephyr 3.x 26 27### Fixed 28- HCI: fix remove le device from whitelist 29- HCI: fix restart connect with whitelist after whitelist modification 30- L2CAP: make l2cap_get_remote_mtu_for_local_cid available to LE-only builds 31- HFP: use 'don't care' to accept SCO connections, fixes issue on ESP32 32- HFP: fix LC3-WB init 33- HFP AG: fix setup of audio connection in service level established event 34- HFP AG: fix BCM WBS setup 35- HFP HF: send 'deactivate EC/NR' if supported in AG 36- HID Device: set Report Mode as default 37- HID Host: support large HID Descriptors 38- AVDTP: limit L2CAP MTU to largest BR/EDR packet, fixes A2DP Sink role for some Samsung TV 39- AVRCP: reject incoming second l2cap connection 40- AVRCP: generate command for avrcp_controller_get_element_attributes dynamically 41- SPP Server: fix SPP version in SDP record 42- GATT Client: ignore notifications/indications until re-encrypted for bonded device without ENABLE_LE_PROACTIVE_AUTHENTICATION 43- btstack_flash_bank: support alignment larger than 4 44- windows: fix timestamps in packet logs 45- 46### Changed 47- HCI: simplified implicit SCO flow control 48- AVRCP: shorten default SDP Service and Provider Names 49- GATT Client: emit query complete event for gatt_client_discover_characteristic_descriptors in next run loop iteration 50- HFP: report HFP Version 1.9 in SDP record 51- HID Parser: ignore Report Items without Usage 52- btstack_crypto: allow MBEDTLS config via MBEDTLS_CONFIG_FILE 53- remove old Zephyr 1.9 port 54 55 56## Release v1.5.6 57 58### Added 59- HCI: HCI_ACL_CHUNK_SIZE_ALIGNMENT allows to keep HCI transport writes aligned 60- GAP: support additional LE PHYs for scanning and outgoing connections 61- GATT Client: allow to queue requests with gatt_client_request_to_send_gatt_query and gatt_client_request_to_write_without_response 62- GATT Client: support GATT over BR/EDR transport via gatt_client_classic_connect 63- HFP: provide SCO packet types and rx/tx packet lengths in HFP_SUBEVENT_AUDIO_CONNECTION_ESTABLISHED 64- HFP: allow to register custom at commands with hfp_hf_register_custom_at_command 65- HFP: experimental support for LC3-SWB from HFP SWB draft with ENABLE_HFP_SUPER_WIDE_BAND_SPEECH 66- AVRCP: support Cover Art via avrcp_cover_art_client 67- example: gatt_streamer_server and le_streamer_client report DLE and PHY changes 68- NXP: support for NXP Controller with bootloader versions v1, e.g. NXP 88W8997, and v3, e.g. NXP IW416 or IW61x 69- esp32: support esp-idf v5.x audio driver 70- esp32: warn about sdkconfig issues 71- esp32: add BTstack component config options via menuconfig 72- esp32: allow to disable default audio i2s driver via component config 73- esp32: btstack_stdio_init configures buffered output, required for stdin support 74- Port for Renesas RA6M4 with DA14531 75- Port for NXP Controller on POSIX (posix-h4-nxp) 76- Port for newer Infineon Controller on POSIX (posix-h4-bcm) that requires autobaud-mode 77 78### Fixed 79- HCI: fix set extended scan response 80- HCI: fix report of extended advertisements with data len > 31 81- HCI: fix CTKD in Initiator role over BR/EDR SC when using dedicated bonding 82- SM: fix value in SM_EVENT_NUMERIC_COMPARISON_REQUEST 83- SM: ignore Security Request during re-encryption 84- GATT Client: return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER for invalid connection handle 85- A2DP: emit A2DP_SUBEVENT_STREAM_ESTABLISHED with if connection fails, e.g. because of Page Timeout 86- A2DP Source: a2dp_source_stream_send_media_payload was removed, use a2dp_source_stream_send_media_payload_rtp instead 87- A2DP: use samples as timestamp, fixes issue with Apple Airpods Pro 2nd Gen 88- AVDTP Source: avdtp_source_stream_send_media_payload was removed, use avdtp_source_stream_send_media_payload_rtp instead 89- AVRCP: re-register for notification 90- BNEP: validate UUID32 and UUID128 service in connect request 91- HFP: fix setup/accept of synchronous connection 92- HFP: use mandatory safe settings considering BR/EDR Secure Connections to accept synchronous connections 93- HFP: avoid SCO packet types not supported either locally or remotely 94- HFP: remove trailing newline/carriage return in custom command event 95- PBAP Client: make pbap_set_property_selector work for Pull Phonebook 96- btstack_stdin_embedded: use timer to poll RTT input, fix for tickless RTOS 97- esp32: fix audio power amplifier control on Lyra T v4.3 board 98- tool/convert_gatt_service: removed as GATT Service descriptions not available on Bluetooth SIG web site 99 100### Changed 101- GAP: add gap_set_peer_privacy_mode with default LE_PRIVACY_MODE_DEVICE 102- GAP: use stack defaults for LE Connection Parameter Updates 103- GAP: set minimum and maximum CE length to 0 104- GAP: ENABLE_EXPLICIT_DEDICATED_BONDING_DISCONNECT disables disconnect after dedicated bonding 105- GOEP Client: support multiple instances 106- A2DP Sink: drop unused local seid argument in a2dp_sink_establish_stream 107- HFP: emit HFP_SUBEVENT_CUSTOM_AT_MESSAGE_SENT after sending custom command / unsolicited response code 108- sco_demo_util: replace hfp_msbc by hfp_codec 109- BCM: look for PatchRAM file with prefix DEVICE_NAME and extension '.hcd' 110- bluetooth: indicated identity address in resolved address type enums name 111- btstack_audio: added get_samplerate function to help with audio sample rate synchronization 112- btstack_flash_bank: write empty tag instead of overwriting existing tag with ENABLE_TLV_FLASH_WRITE_ONCE 113- esp32: drop support for Makefile projects from esp-idf 3.x 114- esp32: avoid deprecated btstack_run_loop_freertos API calls 115- esp32: use sample rate compensation in a2dp_sink_demo 116- stm32-f4discovery-cc256x: use external oscillator for better I2S clock 117- stm32-f4discovery: use sample rate compensation in a2dp_sink_demo 118 119 120## Release v1.5.5 121 122### Added 123- hci_dump_stdout: allow to truncate ACL, SCO and ISO packets with HCI_DUMP_STDOUT_MAX_SIZE_* 124- GATT Service: Broadcast Audio Scan Service Server and Client (BASS 1.0) 125- example/a2dp_source_demo: add command to scan and connect to Bluetooth speaker by class of device 126 127### Fixed 128- GAP: reload LE Resolving List after power-cycle 129- GAP: fix setting of LE Scan Response for data that needs to be fragmented 130- SM: fix pairing process with active ATT communication 131- ESP32: fix init for BR/EDR Only mode 132- ESP32: fix audio driver for sink + source mode 133- ESP32: fixes for ESP-IDF v5.x 134- ESP32: fix compile of non-BTstack examples after adding components/btstack 135 136### Changed 137- GAP: reload LE Filterlist and Periodic Advertiser List after power-cycle 138- SM: delete bonding information for existing device with BD_ADDR on new pairing with different IRK 139- Mesh: move GATT Services into src/mesh/gatt-service 140- LE Audio: move GATT Services into src/le-audio/gatt-service 141- libusb: improve implementation 142 143## Known Issues 144- ESP32: audio driver for ES8388/LyraT v4.3 not updated for esp-idf 5.x 145 146 147## Release v1.5.4 148 149### Added 150- HFP HF: send custom AT command with hfp_hf_send_at_command 151- HFP HF: terminate held calls with hfp_hf_terminate_held_calls 152- HFP HF: provide Call Waiting information alpha field 153- HFP HF: add hfp_hf_set_default_microphone_gain and hfp_hf_set_set_default_speaker_gain for SLC 154- HFP AG: support handling of custom AT commands with hfp_ag_register_custom_at_command 155- HFP AG: send custom unsolicited result code with hfp_ag_send_unsolicited_result_code 156- GAP: allow to enable duplicate filter for LE scanning with gap_set_scan_duplicate_filter 157- GAP: support BIG with gap_big_create and gap_big_terminate 158- GAP: support BIG Sync gap_big_sync_create and gap_big_sync_terminate 159- GAP: support Periodic Advertisement Sync Transfer 160- port: CMake build files in all windows-* ports allow to use Visual Studio 2022 161- embedded audio: mono audio is played on both channels if HAVE_HAL_AUDIO_SINK_STEREO_ONLY is defined 162- Support for ESP32-C3 and ESP32-S3 163 164### Fixed 165- HCI: only add paired LE devices with IRK to resolving list 166- HCI: send HCI LE Create Connection Cancel only once for outgoing LE connections without whitelist 167- GAP: use static random address after power up 168- L2CAP: fix L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 169- SM: avoid potential loop during CTKD 170 171### Changed 172- HCI Dump: provide log level to log_message implementation 173- GAP: replace BTSTACK_EVENT_DISCOVERABLE_ENABLED with BTSTACK_EVENT_SCAN_MODE_CHANGED 174 175 176## Release v1.5.3 177 178### Added 179- GAP: support periodic advertising with ENABLE_LE_PERIODIC_ADVERTISING 180- GAP: support periodic inquiry mode with gap_inquiry_periodic_start 181- HFP HF: provide Calling Line Identification alpha field 182- HFP HF: emit HFP_SUBEVENT_TRANSMIT_DTMF_CODES after sending DTMF command 183- GOEP Server 184- Chipset: support for firmware download and configuration of Realtek Controllers 185 186### Fixed 187- GAP: fix gap_connect_cancel for gap_connect_with_whitelist 188- GAP: fix race condition that causes duplicate authenticate request 189- SM: address update for non-resolvable private addresses 190- SM: reset state on power off transition 191- L2CAP: Fix accept incoming ERTM connection when Information Request already complete 192- A2DP Sink: fix config API for AAC, ATRAC, and other codecs 193- HFP: try next link setting for SCO connection failure after SCO reject errors 194- HFP AG: activate all AG indicators upon service level connection establishment 195- HFP AG: handle call termination in alerting call state 196- HFP HF: fix parsing of phone number for voice tag 197- HFP HF: report HFP_SUBEVENT_NETWORK_OPERATOR_CHANGED event 198 199### Changed 200- HCI: use ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS to rejected classic connections 201- SM: pairing events indicate if LE Secure Connection will be used 202- A2DP: new a2dp.c contains shared code of Sink and Source roles 203- A2DP Sink: automatically configure stream endpoint for outgoing connections 204- HFP AG: drop unused number parameter from hfp_ag_outgoing_call_initiated 205- libusb: command line options to delete TLV and specify log file path 206- Windows: native implementations of btstack_tlv_window, hci_dump_windows_fs, hci_dump_window_stdout 207 208## Release v1.5.2 209 210### Added 211- GAP: ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS serializes Inquiry, Remote Name Request and Create Connection operations 212- GAP: support extended advertising with ENABLE_LE_EXTENDED_ADVERTISING 213- GAP: gap_enable_link_watchdog() uses automatic flush timeout to disconnect if data cannot be sent 214- GAP: gap_secure_connections_active() to query if BR/EDR Secure Connecions are possible 215- ATT DB: provide gatt_server_get_handle_range_for_service_with_uuid16 to find included service within handle range 216- GATT Service: Audio Input Control Service Server (AICS 1.0) 217- GATT Service: Microphone Control Service Server (MCS 1.0) 218- GATT Service: Volume Control Service Server (VCS 1.0) 219- GATT Service: Volume Offset Control Service Server (VOCS 1.0) 220 221### Fixed 222- POSIX: fix RTS/CTS configuration by keeping local termios copy in btstack_uart_posix 223- HCI: fix handling of HCI Connection Complete with error (regression introduced in v1.5.1) 224- GAP: disable scanning, advertising, connection before updating random address 225- GAP: fix LE Scan with whitelist 226- HFP_AG: fix tracking for call dropped during outgoing ringing 227- HFP: Free HFP Connection object on SDP error / Service not found 228- PBAP Client: emit operation complete with status OBEX_ABORTED 229 230### Changed 231- Chipset: use da145xx in folder/file/function names for Dialog Semiconductor SoCs 232- GAP: set min encryption key size during init, if supported 233- AVDTP: use BLUETOOTH_SERVICE_CLASS_AUDIO_SINK / SOURCE instead of BLUETOOTH_PROTOCOL_AVDTP in SDP queries 234- ATT Server: use uint8_t for status returns 235- libusb, POSIX and Windows ports: use '-' instead of ':' in btstack_BD_ADDR.tlv filename 236 237 238## Release v1.5.1 239 240### Added 241- GOEP Client: add goep_client_version_20_or_higher 242- ESP32: implement audio source 243 244### Fixed 245- PBAP Client: support disconnect while operation is ongoing 246- PBAP Client: use SRM only if GOEP v2.0 or higher connection 247- PBAP Client: emit vCard entry data as PBAP_DATA_PACKET 248- L2CAP: limit remote MTU by local tx configuration in ERTM 249 250### Changed 251- Example: init SM if LE supported to avoid issue with Android Cross-Transport Key-Derivation 252- ESP32: update sdkconfig for esp-idf v4.3, disable Bluedroid host stack 253- ESP32: use I2S configuration from ESP32 LyraT V4.3 254 255 256## Release v1.5.0 257 258### Added 259- HCI Dump: Support BTSnoop format in hci_dump_posix_fs.c for format = HCI_DUMP_BTSNOOP 260- HCI Dump RTT STDOUT: drop messages if RTT buffer is full and RTT is configured for non-blocking 261- HCI: hci_remove_event_handler to remove packet handler 262- hci_cmd: support variable length fields and arrayed parameters 263- GAP: ENABLE_EXPLICIT_LINK_KEY_REPLY allows for asynchronous link key lookup by application 264- GAP: gap_set_page_timeout to set Page Timeout 265- GAP: gap_inquiry_set_scan_activity to set Inquiry Scan Activity 266- L2CAP: emit L2CAP_EVENT_INFORMATION_RESPONSE event with extended features and fixed channels supported 267- L2CAP: support Enhanced Credit-based Flow-Control Mode for connection-oriented channels over BR/EDR/LE 268- A2DP: allow to register media codec validator for sink and source with: 269 - `a2dp_sink_register_media_config_validator` 270 - `a2dp_source_register_media_config_validator` 271- A2DP Sink: allow accept or reject of stream start on A2DP_SUBEVENT_START_STREAM_REQUESTED when ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION is defined 272- OBEX: new obex_parser for chunked OBEX data 273- SM: Support Cross-Transport Key-Derivation (CTKD) of LE LTK from BR/EDR SC Link Key in Responder role 274- SM: sm_remove_event_handler to remove packet handler 275- GATT Service: Bond Management Service (BMS 1.0) Server 276- GATT Service: Microphone Control Service (MICS 1.0) Server 277- GATT Service: TX Power Service (TPS 1.0) Server 278- POSIX: btstack_signal allows to register for callback on signal, e.g. ctrl-c 279- Windows: btstack_stdin_window_register_ctrl_c_callback allows to register for ctrl-c 280 281### Fixed 282- A2DP Source: fix reconfigure 283- AVRCP Controller: prevent registering of notifications for unsupported events 284- RFCOMM: fixed handling of remote port configuration command 285- HFP AG: fix accept incoming connection while audio connection is established 286- PBAP Client: handle chunked vCard Listing 287- PBAP Client: use new streaming obex_parser to handle chunked OBEX data 288- SM: Work around for unexpected Windows 10 disconnect for BR Secure Connections (SMP over BR timeout) 289- SM: support storing bonding information for devices with identical IRK but different public addresses 290- GAP: restart advertising when private address changes 291- le_device_db_tlv: keep number of devices reported by le_device_db_count if old entry is replaced 292 293### Changed 294- Drop iOS support 295- HCI: provide status instead of undocumented int error code and bool for API functions 296- HCI: use 1000 ms watchdog to force power off for hci_power_control(HCI_POWER_OFF) 297- GAP: local name, EIR data, class of device and default link policy can be updated at any time 298- L2CAP: provide status instead of undocumented int error code and bool for API functions 299- L2CAP: remote features not required for SDP connections 300- L2CAP: replaced l2cap_register_packet_handler with l2cap_add_event_handler to register multiple handlers 301- L2CAP: drop reason parameter in l2cap_disconnect 302- L2CAP: use official terminology for L2CAP channel modes - ENABLE_L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE replaces ENABLE_LE_DATA_CHANNELS 303- L2CAP: unify API for can send now, request to send, and send packet and disconnect channel 304- L2CAP: unify events for can send now, packet sent, channel closed (CbM/ECBM using existing events) 305- RFCOMM: `RFCOMM_EVENT_PORT_CONFIGURATION` contains rfcomm_cid and remote flag, emitted for query config 306- RFCOMM: provide status instead of undocumented int error code and bool for API functions 307- RFCOMM: remote port configuration, line status, and modem status are sent by channel state machine 308- HSP: add ACL Connection to all events and BD ADDR to HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE 309- HFP: API functions return status code if appropriate 310- HFP: removed one parameter from hfp_ag/hf_activate_voice_recognition function, introduce hfp_ag/hf_deactivate_voice_recognition instead 311- HFP: merged legacy and enhanced Voice Recognition Activation (VRA) API. If available enhanced mode will be preferred. 312- HFP: separate events for activation (HFP_SUBEVENT_VOICE_RECOGNITION_ACTIVATED) and deactivation (HFP_SUBEVENT_VOICE_RECOGNITION_DEACTIVATED) instead of combined HFP_SUBEVENT_VOICE_RECOGNITION_STATUS with status field. HFP_SUBEVENT_VOICE_RECOGNITION_ACTIVATED contains field "enhanced" to indicate if enhanced mode is used. 313- HFP: enhanced VRA: HFP_SUBEVENT_VOICE_RECOGNITION_ACTIVATED is emitted after VRA is ready and the the audio connection is established. This simplifies HFP HF client logic, i.e. client can call `hfp_hf_enhanced_voice_recognition_report_ready_for_audio directly` upon reception of HFP_SUBEVENT_VOICE_RECOGNITION_ACTIVATED event. 314- AVDTP: media config validator is called with preview of media codec configuration event and configured separately for sink/source 315- AVRCP: use PANEL as default unit + subunit info 316- AVRCP Controller: automatically query supported events when registering for notifications 317- AVRCP Target: cache companies and events in library and remove need to answer query in application callback. Use Bluetooth SIG as default company. 318- Run Loop: new functionality for HCI transport drivers and inter-process communication: 319 - *btstack_run_loop_poll_data_sources_from_irq*: used to transfer control from IRQ handler to main thread/run loop 320 - *btstack_run_loop_execute_on_main_thread*: schedule code execution on main thread from other thread 321 - *btstack_run_loop_trigger_exit*: trigger run loop exit 322- POSIX / Windows / Raspi / Qt: use updated ctrl-c handling 323- POSIX TLV: use max value size of 2048, assert in store function if value size is larger 324 325 326## Release v1.4.1 327 328### Added 329- GAP: emit GAP_EVENT_PAIRING_STARTED and GAP_EVENT_PAIRING_COMPLETE 330 331### Fixed 332- GAP: store link key in hci connection struct to allow authenticate after pairing without bonding 333- GAP: avoid requesting authentication twice 334- GAP: cache own address on start advertising and connecting, provide getters 335- GAP: stop LE connecting if create connection fails (e.g. connectable adv active and multiple roles not supported) 336- SM: fix race condition between local address changes and pairing procedure 337- ATT DB: fix spelling `gatt_server_get_handle_range_for_service_with_uuid128`, `gatt_server_get_handle_range_for_service_with_uuid16` 338 339### Changed 340- HCI: update advertising data without stopping advertising first 341- GAP: Drop local bonding flag in IO Capability Reply if remote does not indicate bonding 342- GAP: return status for `gap_set_security_mode` 343- GAP: abort legacy pairing if Level 4 is required 344- GAP: abort SSP on IO Capabilities Request event if Level 4 is required but SC not supported by remote 345- GAP: abort SSP on User Confirmation Request event if Level 3 is required but MITM protection not possible 346- GAP: validate minimal service security level can be reached during pairing in responder role 347- L2CAP: don't trigger hci disconnect if l2cap security requirements are insufficient 348- CVE-2020-26555: reject connections to and from devices with same BD ADDR 349- CVE-2020-26555: ignore NULL link key 350- CVE-2020-26558: abort LE Secure Connection pairing if remote uses the same public key 351 352## Release v1.4 353 354### Added 355- HCI: `btstack_transport_sco.h` supports SCO over physical PCM/I2S interface (`HAVE_SCO_TRANSPORT`) 356- POSIX: `btstack_transport_sco_i2s_test_bridge.c` implements SCO transport interface for UART-to-I2S test bridge 357- btstack_uart: `btstack_uart_t` interface extends `btstack_uart_block_t`: 358 - support sending and receiving SLIP frames for HCI H5 359 - support odd parity 360 - `hci_transport_h4` and chipset drivers have new functions to provide `btstack_uart_t` 361- btstack_uart_slip_wrapper: wrapper that implements SLIP functionality for existing `btstack_uart_block` drivers. 362- hci_transport: add parity field and pass on to `btstack_uart_t` in h4 and h5 363- GATT Client: Battery Service Client 364- GATT Client: Device Information Service Client 365- GATT Client: HID-over-GATT (HOG) Client, Report and Boot Host 366- GATT Client: Scan Parameters Service Client 367- GATT Server: Scan Parameters Service Server 368- GAP: support scan page configuration with `gap_set_page_scan_activity` and `gap_set_page_scan_type` 369- GAP: support sniff subrating with `gap_sniff_subrating_configure` 370- GAP: support QoS setup with `gap_qos_set` 371- AVRCP: new field `button_pressed` in `AVRCP_SUBEVENT_OPERATION` 372- AVRCP: `AVRCP_SUBEVENT_OPERATION` emitted for button release 373- AVRCP Controller: `avrcp_controller_start_press_and_hold_cmd` supports arbitrary device buttons 374- AVRCP Controller: reassemble fragmented AVCTP packets 375- AVDTP: `avdtp_register_media_config_validator` allows to validate media codec configuration 376- A2DP Source: `ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG` disables auto config. requires call to `a2dp_source_set_config_{CODEC}` 377 378### Fixed 379- GAP: calculate IO Cap AuthReq Bondable Mode based on `gap_ssp_set_authentication_requirement` and `gap_set_bondable_mode` 380- GAP: only store link key for SSP if remote side has set bondable in io cap auth requirements 381- GAP: allow to disable link supervision timeout 382- GAP: fix `gap_connect` after `gap_connect_cancel` 383- GAP: re-configure advertisements after power cycle 384- HCI: handle start inquiry failure 385- L2CAP: fix create outgoing connection triggered from packet handler on hci disconnect event 386- L2CAP: return unknown mandatory option in config response 387- AVDTP: fix spelling `avdtp_set_preferred_sampling_frequency` 388- AVRCP Target: fix notification changed event 389- HFP: Emit audio connection released on SLC Release, e.g. on remote power off 390- HFP HF: fix audio connection setup if codec negotiation is supported 391- HFP HF: only emit single event for RING and AG Status updates 392- HFP AG: fix audio connection setup for in-band ringtone on incoming connection 393 394### Changed 395- Port Archive: moved ports that are not recommended for new designs to port/archive folder: 396 - MSP430: the ports used the older community GCC version without 20-bit support needed for code size > 64kB 397 - Broadcom/Cypress H5: uploading PatchRAM is only possible in H4 mode. It's better to also use H4 in general 398 - PIC32-Harmony: the port used Harmony v1 while Harmony v3 has been out since a while 399 - iOS: not supported 400- Run Loop Base: functionality used in most platform run loop implementations 401 - code from `btstack_run_loop_base.c` moved into `btstack_run_loop.c` to minimize changes to build systems 402 - `btstack_run_loop_base.c` is a placeholder and can be removed from build 403- HCI Dump: replace monolithic `hci_dump.c` (with many #ifdefs) into dispatcher with platform-specific implementations: 404 - `posix/hci_dump_posix_fs` - writes binary log file 405 - `posix/hci_dump_stdout` - log to console using printf with local system time 406 - `embedded/hci_dump_embedded_stdout` - log to console using printf 407 - `embedded/hci_dump_segger_stdout` - log to RTT console using `SEGGER_printf` 408 - `embedded/hci_dump_segger_binary` - writes binary log over RTT to host 409- HCI: config I2S for BCM Controllers if `ENABLE_SCO_OVER_PCM`, reduce bit clock to 256/512 kHz 410- btstack_uart_posix: supports SLIP frames and replaces `btstack_uart_block_posix` 411- hci_transport_h5: more performant H5 implementation that requires `btstack_uart_t` driver with SLIP support 412- POSIX Ports: use new `btstack_uart_posix` implementation 413- posix-h5/posix-h5-bcm: use even parity for UART 414- HCI Transport: extract convenience function declaration for h4, h5, em9304_spi, and usb into separate hci_transport_{type}.h 415- GAP: provide Device ID from EIR in GAP_EVENT_INQUIRY_RESULT 416- GAP: only store link key if it allows requested security level 417- GAP: abort SSP pairing if MITM protection required but not possible 418- SM: start pairing as Central for already encrypted connection on Slave Security Request 419- GATT Client: Use ATT_READ_REQUEST for first blob of Read Long Characteristic and Read Long Characteristic Descriptor 420- GATT Server: Allow ATT Read Callback to return custom ATT Error Code 421- Nordic SPP Service Server: use `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` and `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` 422 events instead of callback, and `RFCOMM_DATA_PACKET` for received data 423- u-blox SPP Service Server: use `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` and `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` 424 events instead of callback, and `RFCOMM_DATA_PACKET` for received data 425- HID: Move `src/classic/hid.h` into `src` and prefix with `btstack_` to use it with BLE and avoid name clashes 426- HFP: provide acl_handle in events to identify connection 427- HSP AG: emit HSP_SUBEVENT_BUTTON_PRESSED instead of audio connection setup/release 428- Example: use `btstack_event.h` getters instead of direct array access, use enum to compare status codes 429 430 431## Release v1.3.2 432 433### Added 434- GAP: support for Classic Out-of-Band (OOB) pairing via `gap_ssp_remote_oob_data` with `ENABLE_CLASSIC_OOB_PAIRING` 435- GAP: read local OOB data on start and on call to `gap_ssp_generate_oob_data`, provided via `GAP_EVENT_LOCAL_OOB_DATA` 436- HID Host: add profile, update `hid_host_demo.c` example 437 438### Fixed 439- L2CAP: make handling of HCI disconnect more robust 440- AVDTP: emit stream release for active stream if signaling connection is closed first, e.g. caused by HCI disconnect 441- AVRCP: fix issue when Controller and Target send at the same time 442 443### Changed 444- A2DP, AVDTP: use `a2dp_source_set_config_{TYPE}` and `avdtp_config{TYPE}_store` to avoid large number of parameters 445 446 447## Release v1.3 448 449### Added 450- CC256x: with ENABLE_CC256X_ASSISTED_HFP, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 451- BCM: with ENABLE_BCM_PCM_WBS, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 452- SDP Client RFCOMM: add `sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid` 453- HFP: `ENABLE_HFP_AT_MESSAGES` lets HFP emit `HFP_SUBEVENT_AT_MESSAGE_SENT` and `HFP_SUBEVENT_AT_MESSAGE_RECEIVED` 454- A2DP, AVDTP: provide capabilities and configuration events for A2DP codecs: SBC, MPEG Audio, MPEG AAC, ATRAC 455- A2DP + AVDTP Source: allow to send media packet with `avdtp_source_stream_send_media_packet` and `a2dp_source_stream_send_media_packet` 456- A2DP + AVDTP Source: add `avdtp_source_stream_send_media_payload_rtp` and `a2dp_source_stream_send_media_payload_rtp` 457- A2DP Source: emit `A2DP_SUBEVENT_SIGNALING_CAPABILITIES_COMPLETE` 458- A2DP Source: allow to configure endpoints by calling `a2dp_source_set_config_{TYPE}` during SEP discovery with SBC fallback 459 460### Fixed 461- HCI: keep `le connecting request` on connection complete active, fixes gap_auto_connection_stop() + gap_auto_connection_start() 462- L2CAP: fix packet size check for incoming classic basic channels (regression introduced in v1.2.1) 463- HFP AG/HSP AG: avoid connecting to remote service with same role 464- A2DP Source: support multiple Stream Endpoints with different Media Codec types 465- A2DP Source: emit codec configure event with reconfigure flag set on reconfigure 466- GATT Compiler: support multiple instances of the same service 467 468### Changed 469- GAP: provide Link Type parameter to incoming connection filter for `gap_register_classic_connection_filter` 470- HFP/GOEP Client/AVDTP/A2DP: return `SDP_SERVICE_NOT_FOUND` if no suitable SDP record is found 471- AVDTP Source: `avdtp_source_stream_send_media_payload` includes SBC Header and was deprecated 472- AVDTP/A2DP: use `avdtp_channel_mode_t` in `A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION` 473- A2DP: fix events and use `a2dp_cid`, `local_seid,` `remote_seid` field names in A2DP sub-events 474- GATT Client: Skip MTU exchange after MTU exchange on ATT Server 475- Ports: STM32-F103RB Nucleo + CC256x port removed 476- ESP32: enabled HFP Wide-Band Speech, disable classic secure connections in HSP/HFP demos 477 478 479## Release v1.2.1 480 481### Fixed 482- L2CAP: use connection handle for channel lookups 483- L2CAP: forward data only in open state 484 485### Changed 486- L2CAP: check packet size against local mtu for classic basic channels 487 488 489## Release v1.2 490 491### Fixed 492- L2CAP: trigger pairing for outgoing LE Data Channels if security level insufficient 493- SM: fix update of sc flag for re-encrypted connection in peripheral role 494- SM: send security request on re-connect if bonded and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is defined 495- ESP32: fix audio sink driver 496 497### Added 498- GAP: `gap_delete_bonding` removes device from LE Resolving List and from discards LE bonding information 499- GATT Client: delete bonding information if re-encryption fails and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is not defined 500- GATT Client: gatt_client_set_required_security_level() allows to set required minimum security level for all GATT requests 501- SM: emit events for re-encryption started/complete when bonding information is available 502 503### Changed 504- AVRCP Controller: allow to send multiple absolute volume commands without waiting for response. 505- GAP: replaced `ENABLE_LE_CENTRAL_AUTO_ENCRYPION` with `ENABLE_LE_PROACTIVE_AUTHENTICATION` 506 507 508## Changes October 2020 509 510### Fixed 511- AVDTP Initiator: avoid use of remote seid for stream endpoint lookup, fixes issue with two connected devices 512- AVDTP Source: buffer for SBC media codec information got discarded, leading to invalid Set Configuration command in second connection 513- SM: only trigger Cross-Transport Key Derivation (CTKD) when bonding is enabled 514- SM: set LinkKey flag to request CTKD if enabled 515- SM: store CTKD key with Public Identity Address 516- SM: only allow CTKD to overwrite existing link key if derived key has same or higher authentication 517- SM: start SMP Timeout when sending Security Request 518- HFP HF: fix response to AG Codec Selection while waiting for OK of parallel command 519- HCI: fix reject of LE remote connection param request via HCI 520 521### Added 522- GAP: add `gap_get_link_key_for_bd_addr` 523- GAP: add `gap_bonded` to check if bonding information is available for active connection 524- SM: support h7 for CTKD 525 526### Changed 527- SM: Cross-Transport Key Derivation requires `ENABLE_CROSS_TRANSPORT_KEY_DERIVATION` now 528- SM: block connection if encryption fails for bonded devices as Central 529- SM: support pairing as Central after failed re-encryption 530 531 532## Release v1.1 533 534### Fixed 535- AVRCP/AVCTP: report AVRCP 1.6 and AVCTP 1.4 in SDP record 536 537### Added 538 539### Changed 540 541 542## Changes September 2020 543 544### Fixed 545- HFP: fix parsing of ranges e.g. in +CIND responses 546- AVDTP, AVRCP: fix bugs due to transaction id overrun 547- A2DP Source: fix issues with stream configuration by sink 548- hci_dump: fix tv_us calculation for non-posix / embedded systems with binary output 549 550### Added 551- `btstack_ring_buffer`: add `btstack_ring_buffer_reset` to reset it to initial state/empty 552- GAP: Support for address resolution of resolvable private addresses by Controller with `ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION` 553 554### Changed 555- AVDTP, AVRCP, HSP: schedule SDP query, avoids avoids 'command disallowed' if SDP client is busy 556- HSP, HFP: allow to configure usable SCO packet types 557- cc256x: update CC256xC init script to v1.4 558- A2DP Source: use Get All Capabilities if supported by remote get Delay Reporting capability 559 560## Changes August 2020 561 562### Fixed 563- ESP32: fix authentication for incoming Secure Connections 564- AVDTP: Fix forwarding of Delay reports 565- STM32-F4Discovery: fix pan_lwip_http_server by increasing HCI_ACL_PAYLOAD_SIZE 566- tool/create_packet_log: basic support for 16-bit Unicode log files from Windows 567 568### Added 569- `btstack_run_loop_base`: added `btstack_run_loop_base_dump_timer` 570- GAP: request role change for classic connection via `gap_request_role` 571- GAP: LE Whitelist API with `gap_le_whitelist_x` with x = add, remove, clear and new `gap_connect_with_whitelist` 572- SDP Client: add sdp_client_register_query_callback() allows to register query request instead of polling sdp_client_ready() 573- BNEP lwIP: add `bnep_lwip_connect` to establish BNEP connection and manage lwIP network interface 574- New `btstack_linked_queue` utility, a linked list-based queue with first-in-first-out semantics and constant time enqueue/dequeue operations 575- btstack_tlv_posix: add `btstack_tlv_posix_deinit` 576- New `btpclient` for use with [auto-pts project](https://github.com/intel/auto-pts) 577 578### Changed 579- GAP: treat AES-CCM encrypted connection as mutually authenticated (BIAS) 580- GAP: 'gap_auto_connect_x' API deprecated. Please directly manage LE Whitelist with `gap_le_whitelist_*` functions and call `gap_connect_with_whitelist` instead 581- example/hid_host_demo: try to become master for incoming connections 582- btstack_run_loop: use btstack_assert instead of local while(true) 583- att_db_util: allow to reset att_db via `att_db_util_init` 584 585## Changes July 2020 586 587### Fixed 588- AVDTP: fix invalid response for Get Capabilities request if Delay Reporting was supported 589- AVDTP: handle concurrent signaling establishment with reject and retry 590 591### Added 592- example/hid_host_demo: support reconnect from HID device 593- Crypto: support software AES128 for AES-CCM operations 594- AVRCP: introduced AVRCP_FEATURE_MASK_* as alternative to avrcp_controller_supported_feature_t and avrcp_target_supported_feature_t enums 595- btstack_audio: add set_volume() to sink and set_gain() to source interfaces, minimal volume control for portaudio playback 596- AVDTP: renamed definition of supported features from AVDTP_SOURCE_SF_ and AVDTP_SINK_SF_ to AVDTP_SOURCE_FEATURE_MASK_ and AVDTP_SINK_FEATURE_MASK_ respectively 597- GAP: Provide gap_get_role to query master/slave role for HCI connection handle 598- GAP: Provide gap_pin_code_response_binary to use binary data as PIN, e.g. for pairing with Nintendo Wii Remote 599 600### Changed 601- GAP: set minimum required encryption key size for Classic connections back from 16 to 7, matching the Core spec 602 603 604## Changes June 2020 605 606### Fixed 607- HFP: Fix parsing of empty fields, e.g. phone number in +CLCC and other AT commands 608- SM: Fix validation of confirm value for secure connection Passkey entry 609- AVRCP: handle concurrent signaling establishment with reject and retry 610 611### Added 612- GAP: Detect Secure Connection -> Legacy Connection Downgrade Attack by remote features and actual encryption type (BIAS) 613- GAP: Mutual authentication: request authentication after Classic connection got encrypted (BIAS) 614- Windows port for Dialog DA14585 connected via serial port 615 616## Changes 617- CVSD PLC: treat zero frames as good and allow to mark data as bad, e.g. if reported by Controller as erroneous 618 619## Changes May 2020 620 621### Fixed 622- hfp_hf, hsp_hs: use eSCO params in accept sco connection only for incoming eSCO connections 623- pbap_client: fix PBAP UUID len on connect message 624- SM: fix secure connection pairing as peripheral when local user confirmation happens after remote one 625- A2DP Source: only connect to remote sink stream endpoints 626- btstack_hal_flash_memory: fix write of 0xff bytes to simulated flash 627- hsp_hs: fix disconnect if audio not connected 628- hsp_ag: fix accept incoming connection 629 630### Added 631- example/le_mitm: MITM implementation that forwards ATT PDUs and allows for pairing 632- GAP: gap_set_security_level sets required security level for incoming and outgoing connections 633- cc256x: allow to specify power vector for each modulation type 634- FreeRTOS: btstack_run_loop_freertos_trigger_exit allows to request run loop exit 635- SM: support LE Secure Connections Only mode with sm_set_secure_connections_only_mode 636- GAP: enable BR/EDR Secure Connections if supported, add gap_secure_connections_enable 637 638### Changed 639- L2CAP ERTM: send extended features request only once per HCI connection 640 641 642## Changes April 2020 643 644### Fixed 645- hog_mouse_demo/hog_keyboard_demo: handle set protocol mode = boot protocol mode 646- HCI: only update BD_ADDR placeholder in shortened and complete name in EIR data, limit device name to 240/248 bytes 647 648### Added 649- GAP: gap_set_allow_role_switch allows to prevent role switch in outgoing classic ACL connections 650- example: hog_boot_host_demo implements an HID-over-GATT Boot Host that supports keyboard and mouse 651- HCI: add ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS that forces fragmentation of ACL-LE packets to fit into over-the-air packet 652 653### Changed 654- Broadcom/Cypress: wait 300 ms after PatchRAM update in hci.c to assert Controller is ready 655- esp32: provide esp-idf/component/btstack/btstack_port_esp32.c and only minimal app_main in template/main/main.c 656- att_db: skip att_read_callback for ATT Read Blob Request if offset == value_len 657 658 659## Changes March 2020 660 661### Fixed 662- GAP: fixed gap_set_scan_parameters() if issued right before gap_start_scan() 663- HCI: only send HCI Read Local Encryption Key Size if supported by Controller 664 665### Added 666- GATT Client: allow to register for any notification/indication and/or any connection 667- HCI: added hci_read_inquiry_scan_activity and hci_write_inquiry_scan_activity commands 668- chipset: assert hci packet buffers are suitable for firmware upload or patches (atwilc3000,bcm,cc256x,intel) 669- btstack_util: added btstack_replace_bd_addr_placeholder 670 671### Changed 672- AVRCP Target: volume in avrcp_target_volume_changed is reported as current value in interim response to register for volume change notifications 673- SDP Client: query attributes 0x0000..0xffff instead of 0x0001..0xffff to match other stacks / improve compatibility with bad sdp server implementations 674 675 676## Changes Februar 2020 677 678### Fixed 679- AVRCP Target: fix reporting of PLAYBACK_STATUS_CHANGED 680- HCI: handle reconnect request for Classic and LE connections triggered by packet handler for Disconnection Complete Event 681 682### Changed 683- hid_host_mode: allow sniff mode 684 685### Added 686- port/qt-usb and port/qt-h4: integrate BTstack Qt run loop for Unix- and Win32-based Qt application connected to Bluetooth module via H4 over serial port or USB 687 688 689## Changes January 2020 690 691### Fixed 692- L2CAP ERTM: avoid read-after-free on decline of incoming connection 693- GATT Client: set uuid16 to zero when deserializing uuid128 services, characteristics, and descriptors 694- att_db_util: fix realloc of att db buffer for large attributes 695- btstack_tlv_posix: only keep last value in memory, fix delete operation 696- l2cap_signaling: use packet boundary flags 0x00 for LE signaling packets (ignoring hci_non_flushable_packet_boundary_flag_supported()) 697 698### Added 699- att_db_util: provide GATT Database Hash via att_db_util_hash_calc 700- GATT Compiler: provide GATT Database Hash via GATT_DATABASE_HASH Characteristic 701- ATT Server: validate request pdu length 702 703### Changed 704- Crypto: update AES-CMAC implementation to access all message bytes sequentially 705 706 707## Changes December 2019 708 709### Fixed 710- example/pan_lwip_http_server: use Network Access Point, CoD 711- sm: emit pairing complete in master role when no keys are distributed / bonding disabled 712 713### Added 714 715### Changed 716- Updated CC256x initscript: CC256xC v1.3 717- ESP32: add CMake project files 718 719 720## Changes November 2019 721 722### Fixed 723- AVDTP Source: return correct `avdtp_cid` and `local_seid` in `AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW` 724- L2CAP: send LE Data Channel SDUs round robin with other data 725- L2CAP ERTM: send ERTM I-frames round robin with other data 726 727### Added 728- ATT Server: return error if request to send now for Notification or Indication already registered 729- Linked List: return if item was added for `btstack_linked_list_add[_tail]` 730- btstack_run_loop_remove: return bool true if timer/data source was removed 731- segger-rtt: allow to configure with `SEGGER_RTT_PACKETLOG_*` directives, update to v6.54 732- GAP: support setting Link Supervision Timetout for outgoing Classic connections using `gap_set_link_supervision_timeout` 733- lwip: add download test files to http server demo 734 735### Changed 736- Linked List: return bool true if item was removed 737 738 739## Changes October 2019 740 741### Fixed 742 743### Added 744- `btstack_bool.h`: provide boolean type 'bool' via `<stdbool.h>` or as backport 745- provide `btstack_assert(condition)` 746- H4 Transport: avoid calling `hci_transport_h4_trigger_next_read` when transport is closed 747 748### Changed 749- libusb and posix ports: store bonding information in TLV 750 751 752## Changes September 2019 753 754### Fixed 755- L2CAP ERTM: assert that packet can be stored in fragment buffers in ertm 756- L2CAP ERTM: reject incoming connection if ERTM is configured as mandatory but not supported by remote 757- GATT Client: allow Write Without Response independent of other requests 758 759### Added 760- GAP: allow to reject GAP classic connection via gap_register_classic_connection_filter 761- GAP: support reading RSSI for Classic+LE using gap_read_rssi. Emits `GAP_EVENT_RSSI_MEASUREMENT` 762 763### Changed 764- Bluetooth and BTstack Error Codes and Events: collect status codes in bluetooth.h and events in btstack_defines.h 765- bluetooth.h: extract internal defintitions to respective protocol layers 766- Updated CC256x initscripts (CC256xB v1.8, CC256xC v1.2, CC256xC v1.2) 767 768 769## Changes August 2019 770 771### Fixed 772- POSIX, WICED, Windows, FreeRTOS run loops: handle time_ms overrun after 49 days 773- RFCOMM: accept incoming L2CAP connection in Basic mode if ERTM is enabled but not requested for this connection 774- RFCOMM: limit RFCOMM MTU by local L2CAP MTU for outgoing connections (only revelvant for ERTM) 775- L2CAP ERTM: stop timers on disconnect 776- L2CAP ERTM: fix sending of segmented SDUs 777- L2CAP ERTM: handle unsupported Information Response 778- SM: generate local nonce for confirm value in JW+NC+PK in Secure Connections Responder role 779 780### Added 781- `btstack_run_loop_base`: portable implementation of timer and data source management as base for platform specific implementations 782 783## Changed 784- FreeRTOS: use xQueueCreateStatic (static variant of xQueueCreate) if available for static memory-only setups 785- L2CAP ERTM: handle invalid Information Response (assume no extended features supported) 786- POSIX: use monotonic clock as timebase if available 787- HCI Transport H4/H5/EM9304 SPI: ignore block read/sent from UART driver when closed 788- HCI: Read Encryption Key Size after encryption was enabled 789- Errata 11838: 790 - GAP: gap_set_required_encryption_key_size allows to set the required key size, default = 16 (max) 791 - GAP: validate encryption key size to emit GAP Security Levels 792 793## Changes July 2019 794 795### Fixed 796- SM: Fixed regression introduced in f3582630 797- L2CAP: avoid reading l2cap signaling command len out of bounds 798- HCI Transport H4/H5/EM9304 SPI: fix payload size checks (also for 8/16-bit platforms) 799 800### Changed 801- SM: Start encryption upon receiving slave securiy request if bonded 802- hci: use 2 as HCI_INCOMING_PRE_BUFFER_SIZE in LE-only configuration for GATT Client 803 804--- 805 806## Changes June 2019 807 808### Changed 809- FreeRTOS: use freertos/.. prefix to include FreeRTOS headers if HAVE_FREERTOS_INCLUDE_PREFIX is defined 810- BNEP: add Connection Handle to BNEP_EVENT_CHANNEL_OPENED 811- Examples: renamed le_counter to gatt_counter and le_streamer to le_streamer_server to indicate suppport for GATT over BR/EDR 812 813### Fixed 814- BNEP: Bluetooth address is stored in little-endian format for all BNEP_EVENT_* 815- libusb: avoid use-after-free for SCO packets on disconnect 816 817### Added 818- example: pan_lwip_http_server using lwIP as network stack to implement PAN NAP service 819- platform/lwip/bnep_lwip.c: BNEP lwIP adapter that forwards packets between BNEP service and lwIP 820- ENABLE_GATT_OVER_CLASSIC enables support for GATT over BR/EDR in att_server 821 822--- 823 824## Changes May 2019 825 826### Changed 827- ESP32: Configure SCO over HCI after power up 828- btstack_tlv_flash_bank: support targets where a value cannot be overwritten with zero. When ENABLE_TLV_FLASH_EXPLICIT_DELETE_FIELD 829 is defined, an explicit delete field is used to indicate an invalid entry. 830 831### Fixed 832- SM: Avoid potential use-after-free on immediate disconnect (lookup connection via con handle instead of storing pointer) 833 834### Added 835- gatt_client: emit query complete event for signed write operation 836- hci_transport_h4: add workaround for flow control bug in CYW2070x, enable with ENABLE_CYPRESS_BAUDRATE_CHANGE_FLOWCONTROL_BUG_WORKAROUND 837 838--- 839 840## Changes April 2019 841 842### Changed 843- ESP32: use micro-ecc from 3rd-party as esp-idf removed it in their 3.3 release 844 845### Fixed 846- hci: pad LE Scan response with zeroes 847- SM: store local CSRK 848- ATT DB: call write callback for validated signed writes 849- ATT Server: abort signed write validation on incoming new request 850- Bluetooth SIG web scraping tools updated 851- libusb: compiles for FreeBSD 852 853### Added 854 855--- 856 857## Changes March 2019 858 859### Changed 860- use Makefile for stm32-f4discovery-cc256x port 861- le_device_db: add secure_connection argument to le_device_db_encryption_set and le_device_db_encryption_get 862 863### Fixed 864- SM: Use provided authentication requirements in slave security request 865 866### Added 867- port/stm32-f4discovery-cc256x: add support for built-in MEMS microphone 868- SM: Track if connection encryption is based on LE Secure Connection pairing 869- ATT DB: Validate if connection encrypted is based on SC if requested 870- att_db_util: support ATT_SECURITY_AUTHENTICATED_SC permission flag 871- GATT Compiler: support READ_AUTHENTICATED and WRITE_AUTHENTICATED permsission flags 872- ESP32: erase nvs flash is newer nvs version found 873- libusb: add support for nRF52840-PCA10056 running Zephyr hci_usb example 874- port/stm32-l073rz-nucleo-em9304 for Nucleo L073RZ with EM9304 DVK, replaces port/stm32-l053r8-nucleo-em9304 875 876## Changes February 2019 877 878### Changed 879- example/a2dp_sink_demo: use linear resampling to fix sample rate drift 880- btstack_audio: split interface into sink and source 881 882### Fixed 883- Crypto: fix lockup when stack is shutdown while waiting for result of HCI Command, e.g. LE Read Local P256 Public Key 884- SM: Avoid SM_EVENT_PAIRING_COMPLETE with ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION after successful pairing in responder role 885 886### Added 887- example/a2dp_sink_demo: add target role, support volume control on both devices 888- example/audio_duplex: playback audio audio source on audio sink (test audio path) 889- btstack_audio_embedded: implement audio source path 890 891--- 892 893## Changes January 2019 894 895### Changed 896- L2CAP: provide channel mode (basic/ertm) and fcs option in L2CAP_EVENT_CHANNEL_OPENED 897- RFCOMM: support L2CAP ERTM. Callbacks passed to rfcomm_enable_l2cap_ertm() are used to manage ERTM buffers 898 899### Added 900- L2CAP: emit L2CAP_EVENT_ERTM_BUFFER_RELEASED if ERTM buffer not needed/used anymore 901- L2CAP: add fcs_option to ERTM config l2cap_ertm_config_t 902- HCI: validate advertisement data length field when generating GAP_EVENT_ADVERTISING_REPORT 903- ad_parser: validate data element length fields in ad_iterator_has_more 904- Raspberry Pi 3 A+/B+ port in port/raspi, starts without power cycle 905 906### Fixed 907- HCI: release outgoing buffer on disconnect if waiting to send another ACL fragment 908- POSIX: use correct baudrate enums for baud rates higher than 921600 (Linux) 909- Crypto: directly process queued crypto operation on HCI result 910 911--- 912 913## Changes December 2018 914 915### Added 916- SM: generate and store ER / IR keys in TLV, unless manually set by application 917- hci_dump: support PacketLogger or BlueZ format output via SEGGER RTT Channel 1 Up 918 919### Fixed 920- SM: fix internal buffer overrun during random address generation 921 922## Changes November 2018 923 924### Added 925- GAP: gap_le_connection_interval provides connection interval for conn handle 926- Nordic SPP Service Server: GATT service that emulates a serial port over BLE based on Nordic Semiconductor documentation. 927- uBlox SPP Service Server: GATT service that emulates a serial port over BLE based on uBlox documentation. 928- SM: ENABLE_LE_CENTRAL_AUTO_ENCRYPTION triggers automatic encryption on connect to bonded devices 929- SM: generate and store ER / IR keys in TLV, unless manually set by application 930 931### Fixed 932- SM: prevent random address updates if gap_random_address_set was used 933- SM: fix internal buffer overrun that can cause storing of bonding information to fail 934- SM: ignore Slave Security Request after sending own Pairing Request 935- L2CAP: fix use after free on disconnect if ERTM is enabled 936- HFP: Handle multiple commands/responses in single RFCOMM packet 937- Memory Pools: clear all buffers before use 938 939--- 940 941## Changes October 2018 942 943### Added 944- SDP Server: queue incoming connections when already connected instead of rejecting them 945- 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. 946- HIDS Device: GATT service that exposes HID reports intended for HID Devices, like keyboard and mouse. 947 948### Fixed 949- HCI: fix bug in gap_inquiry_stop that triggered additional GAP_EVENT_INQUIRY_COMPLETE instead of stopping the inquiry 950- L2CAP: fix issue with outgoing connection before read remote supported complete when other channels exist 951- L2CAP ERTM: allow SDU of szie MPS in first packet that contains L2CAP SDU Length 952- L2CAP ERTM: fix memory corruption triggered if local_mtu > mps 953- L2CAP ERTM: fix outgoing fragment management 954- HFP: decline incoming RFCOMM connection after outgoing connection was started 955- AVRCP: fix crash on disconnect of connection established by remote 956 957--- 958 959## Changes September 2018 960 961### Fixed 962- HCI: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 963- L2CAP: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 964- L2CAP: Evaluate 'can send now' on HCI Disconnect as ACL buffers in Bluetooth Controller have been used for the closed connection are freed implicitly 965- L2CAP: Check can send now before sending extended information requeste needed for ERTM mode 966- L2CAP: Use valid signaling identifier for L2CAP Connection Parameter Update Request 967- 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 968- RFCOMM: Avoid use-after-free on channel finalize 969- GATT Client: stop timer on disconnect - fixes use after free / crash 970 971### Added 972- A2DP Source: Support stream reconfiguration (a2dp_source_reconfigure_stream_sampling_frequency) 973- 3rd-party: yxml is used for PBAP vCard list parsing 974- cc256xC: new v1.1 init scripts 975 976--- 977 978## Changes August 2018 979 980### Added 981- PBAP: added pbap_get_phonebook_size() to get phonebook entry count 982 983### Fixed 984- GATT Server: Allow enable Notifications/Indication with Write Command. Fixes issue with some Android devices. 985- SM: fix pairing for Secure Connections with Bonding if remote sends additional keys 986- SM: drop LTK flag from Pairing Response for Secure Connections 987- L2CAP: fix emitted L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 988 989## Changes June 2018 990 991### Added 992- btstack_audio.h: application level API for audio playback and recording 993- embedded/hal_audio.h: low-level API for audio playback and recording 994- HID Device: hid_device_connect(..) function 995- ESP32: implement hal_audio 996- DA14585: support for Dialog Semiconductor DA14585 LE-only controller 997- Raspberry Pi 3 + Raspberry Pi Zero W port in port/raspi 998 999### Changed 1000- Errata 10734: 1001 - SM: Generate new EC Public Keypair after each pairing 1002 - SM: Abort failure with DHKEY_CHECK_FAILED if received public key is invalid (instead of unspecified error) 1003- btstack.h: only include classic headers if ENABLE_CLASSIC is defined 1004- windows: ignore virtual Bluetooth adapter provided by VMware 1005- Replaced HCI_PACKET_BUFFER_SIZE with HCI_INCOMING_PACKET_BUFFER_SIZE and HCI_OUTGOING_PACKET_BUFFER_SIZE 1006 1007--- 1008 1009## Changes June 2018 1010 1011### Fixed 1012- HFP: Fix Wide Band Speech bit in SDP record for both HF/AG. Missing bit prevents macOS from using mSBC 1013- ATT Server: send ATT_EVENT_HANDLE_VALUE_INDICATION_COMPLETE with status ATT_HANDLE_VALUE_INDICATION_DISCONNECT on disconnect 1014- AVRCP Controller: fix parsing of now playing info 1015 1016### Changed 1017- ATT Server: ATT_HANDLE_VALUE_INDICATION_DISCONNECT is delivered to service handler if registered 1018 1019### Added 1020- ATT Server: packet handler field added to att_service_handler_t to receive: connect/disconnect, atu exchange, indication complete 1021 1022--- 1023 1024## Changes May 2018 1025 1026### Added 1027- GAP: re-encrypt outgoing connection if bonded 1028- ATT Server: wait until re-encryption is complete 1029- GATT Client: wait until re-encryption is complete 1030- ATT Server: added att_server_request_to_send_notification and att_server_request_to_send_indication 1031- GATT Client: if ENABLE_GATT_CLIENT_PAIRING, GATT Client starts pairing and retry operation on security error 1032 1033### Changed 1034- ATT Server: att_server_register_can_send_now_callback is deprecated, use att_server_request_to_send_notification/indication instead 1035 1036### Fixed 1037- SM: Fix LE Secure Connection pairing in Central role 1038- le_device_db_tlv: fix seq nr management 1039- SM: improve le_device_db lookup and storing of IRK 1040- GATT Server: fix lookup for Client Characteristic Configuration in services with multiple Characteristics 1041- RFCOMM: emit channel closed on HCI/L2CAP disconnect after sending DISC while expecting UA 1042 1043--- 1044 1045## Changes April 2018 1046 1047### Added 1048- Crypto: btstack_crypo.h provides cryptographic functions for random data generation, AES128, EEC, CBC-MAC (Mesh) 1049- SM: support pairing using Out-of-Band (OOB) data with LE Secure Connections 1050- Embedded: support btstack_stdin via SEGGER RTT 1051 1052### Changed 1053- att_db_util: added security requirement arguments to characteristic creators 1054- SM: use btstack_crypto for cryptographpic functions 1055- GAP: security level for Classic protocols (asides SDP) raised to 2 (encryption) 1056 1057### Fixed 1058- HFP: fix answer call command 1059- HCI: fix buffer overrun in gap_inquiry_explode 1060- SDP: free service record item on sdp_unregister_service 1061 1062## Changes March 2018 1063 1064### Added 1065- GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections 1066- ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c 1067- ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated 1068 1069### Fixed 1070- RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1) 1071- HSP HS: accept incomming SCO connection 1072- SM: fix iteration over LE Device DB entries for bonding and address resolving 1073- SM: store pairing information only if both devices have requested bonding 1074 1075--- 1076 1077## Changes February 2018 1078 1079### Added 1080- GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE 1081- SM: new event SM_EVENT_PAIRING_COMPLETE 1082- GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done 1083- GAP: add gap_delete_all_link_keys 1084 1085### Changed 1086- GATT Client: round robin for multiple connections 1087- ATT Dispatch: round robin for ATT Server & GATT Client 1088- L2CAP: round robin for all L2CAP channels (fixed and dynamic) 1089- btstack_link_key_db: addition functions for link key iteration 1090- GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up 1091- CSR: set all keys in psram instead of default 1092 1093### Fixed 1094- tc3556x: fix startup after baud rate change 1095 1096--- 1097 1098## Changes January 2018 1099 1100### Added 1101- Port for Windows with Zephyr HCI Firmware connected via serial port 1102- em9304: upload patch containers during HCI bootup 1103- Makefile for STM32-F4Discovery port 1104- support for console out via SEGGER RTT 1105- LE Data Channels example in BTstack and [iOS example on GitHub](https://github.com/bluekitchen/CBL2CAPChannel-Demo) 1106- LE Streamer Client can send as fast as possbile as well 1107- L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu 1108 1109### Changed 1110- HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave) 1111- GAP: gap_set_connection_parameters includes scan interval and window params 1112- GATT Client: GATT_EVENT_MTU indicates max MTU 1113- ATT DB Util: attribute handle is returned for new Services and Characteristics 1114 1115### Fixed 1116- Windows: retry serial port operations if not all bytes have been read/written 1117- HFP: avoid buffer overflows setting up messages 1118- SBC Decoder: improved error handling for invalid SBC audio data 1119- GAP: fix Connection Parameter Response in Central role 1120- ATT DB Util: update pointer to database in case of realloc 1121- GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128 1122- GAP: release HCI Connnection after gap_le_conne 1123- ATT: Exchanged MTU is propagate to ATT Server and GATT Client 1124 1125--- 1126 1127## Changes December 2017 1128 1129### Added 1130- Introduced btstack_network.h network interface abstraction 1131- btstack_network_posix implementation using Linux tun/tap interface 1132- WICED: support for btstack_stdin (HAVE_STDIN) 1133- 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. 1134- TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h) 1135- TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c 1136- LE Device DB TLV: overwrite oldest entry if no free entries available 1137- SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role 1138- Example/hid_host_demo with HID parser and support for basic US keyboard layout 1139- 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 1140- Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304) 1141 1142### Changed 1143- panu_demo: uses btstack_network.h now 1144- WICED: configure printf to replace Linefeed with CRLF 1145- SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations 1146 1147### Fixed 1148- RFCOMM: support connection requests during connection failure 1149- L2CAP: support connection requests during connection failure 1150- L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU) 1151- HCI: avoid double free during halting 1152- SM: fixed reconnect using legacy pairing in slave role 1153 1154 1155