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### Added 11### Fixed 12### Changed 13 14 15## Release v1.6 16 17### Added 18- HCI: allow to configure Classic ACL packet types with hci_enable_acl_packet_types 19- GAP: emit generic GAP_SUBEVENT_LE_CONNECTION_COMPLETE for any LE Connection Complete 20- SM: support LE Secure Connection debug keys for testing 21- L2CAP: additional authorization_required param in l2cap_ecbm_register_service 22- GATT Client: support GATT over Enhanced LE Bearer 23- GATT Server: support GATT over Enhanced LE Bearer 24- A2DP: support SDP record without service name and/or provider 25- AVRCP: support SDP record without service name and/or provider 26- HFP: hfp_hf_create_sdp_record_with_codecs and hfp_hf_create_sdp_record_with_codecs 27- HFP: support SDP record without service name 28- HFP: support for LC3-SWB 29- SPP Server: support SDP record without service name 30- HOG Device: emit HIDS_SUBEVENT_SET_REPORT 31- HOG Device: provide report for GET REPORT operation via callback 32- SBC Codec: new interface allows for multiple instances 33- LE Device DB: le_device_db_dump dumps LTK 34- Port for Zephyr 3.x 35- Port for FreeBSD that uses kernel netgraph HCI node 36 37### Fixed 38- HCI: fix remove le device from whitelist and periodic advertiser list 39- HCI: fix restart connect with whitelist after whitelist modification 40- GAP: store classic link keys independent from peer bonding request 41- SM: directly detect invalid Public key when Controller ECC is used 42- SM: sm: only set LinkKey flag in Pairing Request/Response if BR/EDR supported locally 43- L2CAP: make l2cap_get_remote_mtu_for_local_cid available to LE-only builds 44- L2CAP: handle all signaling requests and responses in closed state 45- HFP: use 'don't care' to accept SCO connections, fixes issue on ESP32 46- HFP: fix LC3-WB init 47- HFP AG: fix setup of audio connection in service level established event 48- HFP AG: fix BCM WBS setup 49- HFP AG: allow use of mSBC in subsequent audio connections after CSVD downgrade 50- HFP AG: fix terminate held call 51- HFP HF: send 'deactivate EC/NR' if supported in AG 52- HID Device: set Report Mode as default 53- HID Host: support large HID Descriptors 54- AVDTP: limit L2CAP MTU to largest BR/EDR packet, fixes A2DP Sink role for some Samsung TV 55- AVDTP: fix Get Stream Configuration 56- AVDTP: reject suspend in state endpoint open 57- AVDTP: return error in avdtp_suspend_stream if state is not streaming 58- AVRCP: reject incoming second l2cap connection 59- AVRCP: generate command for avrcp_controller_get_element_attributes dynamically 60- SPP Server: fix SPP version in SDP record 61- GATT Client: ignore notifications/indications until re-encrypted for bonded device without ENABLE_LE_PROACTIVE_AUTHENTICATION 62- btstack_flash_bank: support alignment larger than 4 63- windows: fix timestamps in packet logs 64 65### Changed 66- HCI: simplified implicit SCO flow control 67- HCI: return ERROR_CODE_COMMAND_DISALLOWED for outgoing connections in gap_connect 68- GAP: only return status code for errors in gap_connect 69- AVRCP: shorten default SDP Service and Provider Names 70- GATT Client: emit query complete event for gatt_client_discover_characteristic_descriptors in next run loop iteration 71- HFP: report HFP Version 1.9 in SDP record 72- HID Parser: ignore Report Items without Usage 73- btstack_crypto: allow MBEDTLS config via MBEDTLS_CONFIG_FILE 74- remove old Zephyr 1.9 port 75- ports: require CMake 3.12 for CMake projects 76 77## Release v1.5.6 78 79### Added 80- HCI: HCI_ACL_CHUNK_SIZE_ALIGNMENT allows to keep HCI transport writes aligned 81- GAP: support additional LE PHYs for scanning and outgoing connections 82- GATT Client: allow to queue requests with gatt_client_request_to_send_gatt_query and gatt_client_request_to_write_without_response 83- GATT Client: support GATT over BR/EDR transport via gatt_client_classic_connect 84- HFP: provide SCO packet types and rx/tx packet lengths in HFP_SUBEVENT_AUDIO_CONNECTION_ESTABLISHED 85- HFP: allow to register custom at commands with hfp_hf_register_custom_at_command 86- HFP: experimental support for LC3-SWB from HFP SWB draft with ENABLE_HFP_SUPER_WIDE_BAND_SPEECH 87- AVRCP: support Cover Art via avrcp_cover_art_client 88- example: gatt_streamer_server and le_streamer_client report DLE and PHY changes 89- NXP: support for NXP Controller with bootloader versions v1, e.g. NXP 88W8997, and v3, e.g. NXP IW416 or IW61x 90- esp32: support esp-idf v5.x audio driver 91- esp32: warn about sdkconfig issues 92- esp32: add BTstack component config options via menuconfig 93- esp32: allow to disable default audio i2s driver via component config 94- esp32: btstack_stdio_init configures buffered output, required for stdin support 95- Port for Renesas RA6M4 with DA14531 96- Port for NXP Controller on POSIX (posix-h4-nxp) 97- Port for newer Infineon Controller on POSIX (posix-h4-bcm) that requires autobaud-mode 98 99### Fixed 100- HCI: fix set extended scan response 101- HCI: fix report of extended advertisements with data len > 31 102- HCI: fix CTKD in Initiator role over BR/EDR SC when using dedicated bonding 103- SM: fix value in SM_EVENT_NUMERIC_COMPARISON_REQUEST 104- SM: ignore Security Request during re-encryption 105- GATT Client: return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER for invalid connection handle 106- A2DP: emit A2DP_SUBEVENT_STREAM_ESTABLISHED with if connection fails, e.g. because of Page Timeout 107- A2DP Source: a2dp_source_stream_send_media_payload was removed, use a2dp_source_stream_send_media_payload_rtp instead 108- A2DP: use samples as timestamp, fixes issue with Apple Airpods Pro 2nd Gen 109- AVDTP Source: avdtp_source_stream_send_media_payload was removed, use avdtp_source_stream_send_media_payload_rtp instead 110- AVRCP: re-register for notification 111- BNEP: validate UUID32 and UUID128 service in connect request 112- HFP: fix setup/accept of synchronous connection 113- HFP: use mandatory safe settings considering BR/EDR Secure Connections to accept synchronous connections 114- HFP: avoid SCO packet types not supported either locally or remotely 115- HFP: remove trailing newline/carriage return in custom command event 116- PBAP Client: make pbap_set_property_selector work for Pull Phonebook 117- btstack_stdin_embedded: use timer to poll RTT input, fix for tickless RTOS 118- esp32: fix audio power amplifier control on Lyra T v4.3 board 119- tool/convert_gatt_service: removed as GATT Service descriptions not available on Bluetooth SIG web site 120 121### Changed 122- GAP: add gap_set_peer_privacy_mode with default LE_PRIVACY_MODE_DEVICE 123- GAP: use stack defaults for LE Connection Parameter Updates 124- GAP: set minimum and maximum CE length to 0 125- GAP: ENABLE_EXPLICIT_DEDICATED_BONDING_DISCONNECT disables disconnect after dedicated bonding 126- GOEP Client: support multiple instances 127- A2DP Sink: drop unused local seid argument in a2dp_sink_establish_stream 128- HFP: emit HFP_SUBEVENT_CUSTOM_AT_MESSAGE_SENT after sending custom command / unsolicited response code 129- sco_demo_util: replace hfp_msbc by hfp_codec 130- BCM: look for PatchRAM file with prefix DEVICE_NAME and extension '.hcd' 131- bluetooth: indicated identity address in resolved address type enums name 132- btstack_audio: added get_samplerate function to help with audio sample rate synchronization 133- btstack_flash_bank: write empty tag instead of overwriting existing tag with ENABLE_TLV_FLASH_WRITE_ONCE 134- esp32: drop support for Makefile projects from esp-idf 3.x 135- esp32: avoid deprecated btstack_run_loop_freertos API calls 136- esp32: use sample rate compensation in a2dp_sink_demo 137- stm32-f4discovery-cc256x: use external oscillator for better I2S clock 138- stm32-f4discovery: use sample rate compensation in a2dp_sink_demo 139 140 141## Release v1.5.5 142 143### Added 144- hci_dump_stdout: allow to truncate ACL, SCO and ISO packets with HCI_DUMP_STDOUT_MAX_SIZE_* 145- GATT Service: Broadcast Audio Scan Service Server and Client (BASS 1.0) 146- example/a2dp_source_demo: add command to scan and connect to Bluetooth speaker by class of device 147 148### Fixed 149- GAP: reload LE Resolving List after power-cycle 150- GAP: fix setting of LE Scan Response for data that needs to be fragmented 151- SM: fix pairing process with active ATT communication 152- ESP32: fix init for BR/EDR Only mode 153- ESP32: fix audio driver for sink + source mode 154- ESP32: fixes for ESP-IDF v5.x 155- ESP32: fix compile of non-BTstack examples after adding components/btstack 156 157### Changed 158- GAP: reload LE Filterlist and Periodic Advertiser List after power-cycle 159- SM: delete bonding information for existing device with BD_ADDR on new pairing with different IRK 160- Mesh: move GATT Services into src/mesh/gatt-service 161- LE Audio: move GATT Services into src/le-audio/gatt-service 162- libusb: improve implementation 163 164## Known Issues 165- ESP32: audio driver for ES8388/LyraT v4.3 not updated for esp-idf 5.x 166 167 168## Release v1.5.4 169 170### Added 171- HFP HF: send custom AT command with hfp_hf_send_at_command 172- HFP HF: terminate held calls with hfp_hf_terminate_held_calls 173- HFP HF: provide Call Waiting information alpha field 174- HFP HF: add hfp_hf_set_default_microphone_gain and hfp_hf_set_set_default_speaker_gain for SLC 175- HFP AG: support handling of custom AT commands with hfp_ag_register_custom_at_command 176- HFP AG: send custom unsolicited result code with hfp_ag_send_unsolicited_result_code 177- GAP: allow to enable duplicate filter for LE scanning with gap_set_scan_duplicate_filter 178- GAP: support BIG with gap_big_create and gap_big_terminate 179- GAP: support BIG Sync gap_big_sync_create and gap_big_sync_terminate 180- GAP: support Periodic Advertisement Sync Transfer 181- port: CMake build files in all windows-* ports allow to use Visual Studio 2022 182- embedded audio: mono audio is played on both channels if HAVE_HAL_AUDIO_SINK_STEREO_ONLY is defined 183- Support for ESP32-C3 and ESP32-S3 184 185### Fixed 186- HCI: only add paired LE devices with IRK to resolving list 187- HCI: send HCI LE Create Connection Cancel only once for outgoing LE connections without whitelist 188- GAP: use static random address after power up 189- L2CAP: fix L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 190- SM: avoid potential loop during CTKD 191 192### Changed 193- HCI Dump: provide log level to log_message implementation 194- GAP: replace BTSTACK_EVENT_DISCOVERABLE_ENABLED with BTSTACK_EVENT_SCAN_MODE_CHANGED 195 196 197## Release v1.5.3 198 199### Added 200- GAP: support periodic advertising with ENABLE_LE_PERIODIC_ADVERTISING 201- GAP: support periodic inquiry mode with gap_inquiry_periodic_start 202- HFP HF: provide Calling Line Identification alpha field 203- HFP HF: emit HFP_SUBEVENT_TRANSMIT_DTMF_CODES after sending DTMF command 204- GOEP Server 205- Chipset: support for firmware download and configuration of Realtek Controllers 206 207### Fixed 208- GAP: fix gap_connect_cancel for gap_connect_with_whitelist 209- GAP: fix race condition that causes duplicate authenticate request 210- SM: address update for non-resolvable private addresses 211- SM: reset state on power off transition 212- L2CAP: Fix accept incoming ERTM connection when Information Request already complete 213- A2DP Sink: fix config API for AAC, ATRAC, and other codecs 214- HFP: try next link setting for SCO connection failure after SCO reject errors 215- HFP AG: activate all AG indicators upon service level connection establishment 216- HFP AG: handle call termination in alerting call state 217- HFP HF: fix parsing of phone number for voice tag 218- HFP HF: report HFP_SUBEVENT_NETWORK_OPERATOR_CHANGED event 219 220### Changed 221- HCI: use ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS to rejected classic connections 222- SM: pairing events indicate if LE Secure Connection will be used 223- A2DP: new a2dp.c contains shared code of Sink and Source roles 224- A2DP Sink: automatically configure stream endpoint for outgoing connections 225- HFP AG: drop unused number parameter from hfp_ag_outgoing_call_initiated 226- libusb: command line options to delete TLV and specify log file path 227- Windows: native implementations of btstack_tlv_window, hci_dump_windows_fs, hci_dump_window_stdout 228 229## Release v1.5.2 230 231### Added 232- GAP: ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS serializes Inquiry, Remote Name Request and Create Connection operations 233- GAP: support extended advertising with ENABLE_LE_EXTENDED_ADVERTISING 234- GAP: gap_enable_link_watchdog() uses automatic flush timeout to disconnect if data cannot be sent 235- GAP: gap_secure_connections_active() to query if BR/EDR Secure Connecions are possible 236- ATT DB: provide gatt_server_get_handle_range_for_service_with_uuid16 to find included service within handle range 237- GATT Service: Audio Input Control Service Server (AICS 1.0) 238- GATT Service: Microphone Control Service Server (MCS 1.0) 239- GATT Service: Volume Control Service Server (VCS 1.0) 240- GATT Service: Volume Offset Control Service Server (VOCS 1.0) 241 242### Fixed 243- POSIX: fix RTS/CTS configuration by keeping local termios copy in btstack_uart_posix 244- HCI: fix handling of HCI Connection Complete with error (regression introduced in v1.5.1) 245- GAP: disable scanning, advertising, connection before updating random address 246- GAP: fix LE Scan with whitelist 247- HFP_AG: fix tracking for call dropped during outgoing ringing 248- HFP: Free HFP Connection object on SDP error / Service not found 249- PBAP Client: emit operation complete with status OBEX_ABORTED 250 251### Changed 252- Chipset: use da145xx in folder/file/function names for Dialog Semiconductor SoCs 253- GAP: set min encryption key size during init, if supported 254- AVDTP: use BLUETOOTH_SERVICE_CLASS_AUDIO_SINK / SOURCE instead of BLUETOOTH_PROTOCOL_AVDTP in SDP queries 255- ATT Server: use uint8_t for status returns 256- libusb, POSIX and Windows ports: use '-' instead of ':' in btstack_BD_ADDR.tlv filename 257 258 259## Release v1.5.1 260 261### Added 262- GOEP Client: add goep_client_version_20_or_higher 263- ESP32: implement audio source 264 265### Fixed 266- PBAP Client: support disconnect while operation is ongoing 267- PBAP Client: use SRM only if GOEP v2.0 or higher connection 268- PBAP Client: emit vCard entry data as PBAP_DATA_PACKET 269- L2CAP: limit remote MTU by local tx configuration in ERTM 270 271### Changed 272- Example: init SM if LE supported to avoid issue with Android Cross-Transport Key-Derivation 273- ESP32: update sdkconfig for esp-idf v4.3, disable Bluedroid host stack 274- ESP32: use I2S configuration from ESP32 LyraT V4.3 275 276 277## Release v1.5.0 278 279### Added 280- HCI Dump: Support BTSnoop format in hci_dump_posix_fs.c for format = HCI_DUMP_BTSNOOP 281- HCI Dump RTT STDOUT: drop messages if RTT buffer is full and RTT is configured for non-blocking 282- HCI: hci_remove_event_handler to remove packet handler 283- hci_cmd: support variable length fields and arrayed parameters 284- GAP: ENABLE_EXPLICIT_LINK_KEY_REPLY allows for asynchronous link key lookup by application 285- GAP: gap_set_page_timeout to set Page Timeout 286- GAP: gap_inquiry_set_scan_activity to set Inquiry Scan Activity 287- L2CAP: emit L2CAP_EVENT_INFORMATION_RESPONSE event with extended features and fixed channels supported 288- L2CAP: support Enhanced Credit-based Flow-Control Mode for connection-oriented channels over BR/EDR/LE 289- A2DP: allow to register media codec validator for sink and source with: 290 - `a2dp_sink_register_media_config_validator` 291 - `a2dp_source_register_media_config_validator` 292- 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 293- OBEX: new obex_parser for chunked OBEX data 294- SM: Support Cross-Transport Key-Derivation (CTKD) of LE LTK from BR/EDR SC Link Key in Responder role 295- SM: sm_remove_event_handler to remove packet handler 296- GATT Service: Bond Management Service (BMS 1.0) Server 297- GATT Service: Microphone Control Service (MICS 1.0) Server 298- GATT Service: TX Power Service (TPS 1.0) Server 299- POSIX: btstack_signal allows to register for callback on signal, e.g. ctrl-c 300- Windows: btstack_stdin_window_register_ctrl_c_callback allows to register for ctrl-c 301 302### Fixed 303- A2DP Source: fix reconfigure 304- AVRCP Controller: prevent registering of notifications for unsupported events 305- RFCOMM: fixed handling of remote port configuration command 306- HFP AG: fix accept incoming connection while audio connection is established 307- PBAP Client: handle chunked vCard Listing 308- PBAP Client: use new streaming obex_parser to handle chunked OBEX data 309- SM: Work around for unexpected Windows 10 disconnect for BR Secure Connections (SMP over BR timeout) 310- SM: support storing bonding information for devices with identical IRK but different public addresses 311- GAP: restart advertising when private address changes 312- le_device_db_tlv: keep number of devices reported by le_device_db_count if old entry is replaced 313 314### Changed 315- Drop iOS support 316- HCI: provide status instead of undocumented int error code and bool for API functions 317- HCI: use 1000 ms watchdog to force power off for hci_power_control(HCI_POWER_OFF) 318- GAP: local name, EIR data, class of device and default link policy can be updated at any time 319- L2CAP: provide status instead of undocumented int error code and bool for API functions 320- L2CAP: remote features not required for SDP connections 321- L2CAP: replaced l2cap_register_packet_handler with l2cap_add_event_handler to register multiple handlers 322- L2CAP: drop reason parameter in l2cap_disconnect 323- L2CAP: use official terminology for L2CAP channel modes - ENABLE_L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE replaces ENABLE_LE_DATA_CHANNELS 324- L2CAP: unify API for can send now, request to send, and send packet and disconnect channel 325- L2CAP: unify events for can send now, packet sent, channel closed (CbM/ECBM using existing events) 326- RFCOMM: `RFCOMM_EVENT_PORT_CONFIGURATION` contains rfcomm_cid and remote flag, emitted for query config 327- RFCOMM: provide status instead of undocumented int error code and bool for API functions 328- RFCOMM: remote port configuration, line status, and modem status are sent by channel state machine 329- HSP: add ACL Connection to all events and BD ADDR to HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE 330- HFP: API functions return status code if appropriate 331- HFP: removed one parameter from hfp_ag/hf_activate_voice_recognition function, introduce hfp_ag/hf_deactivate_voice_recognition instead 332- HFP: merged legacy and enhanced Voice Recognition Activation (VRA) API. If available enhanced mode will be preferred. 333- 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. 334- 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. 335- AVDTP: media config validator is called with preview of media codec configuration event and configured separately for sink/source 336- AVRCP: use PANEL as default unit + subunit info 337- AVRCP Controller: automatically query supported events when registering for notifications 338- AVRCP Target: cache companies and events in library and remove need to answer query in application callback. Use Bluetooth SIG as default company. 339- Run Loop: new functionality for HCI transport drivers and inter-process communication: 340 - *btstack_run_loop_poll_data_sources_from_irq*: used to transfer control from IRQ handler to main thread/run loop 341 - *btstack_run_loop_execute_on_main_thread*: schedule code execution on main thread from other thread 342 - *btstack_run_loop_trigger_exit*: trigger run loop exit 343- POSIX / Windows / Raspi / Qt: use updated ctrl-c handling 344- POSIX TLV: use max value size of 2048, assert in store function if value size is larger 345 346 347## Release v1.4.1 348 349### Added 350- GAP: emit GAP_EVENT_PAIRING_STARTED and GAP_EVENT_PAIRING_COMPLETE 351 352### Fixed 353- GAP: store link key in hci connection struct to allow authenticate after pairing without bonding 354- GAP: avoid requesting authentication twice 355- GAP: cache own address on start advertising and connecting, provide getters 356- GAP: stop LE connecting if create connection fails (e.g. connectable adv active and multiple roles not supported) 357- SM: fix race condition between local address changes and pairing procedure 358- ATT DB: fix spelling `gatt_server_get_handle_range_for_service_with_uuid128`, `gatt_server_get_handle_range_for_service_with_uuid16` 359 360### Changed 361- HCI: update advertising data without stopping advertising first 362- GAP: Drop local bonding flag in IO Capability Reply if remote does not indicate bonding 363- GAP: return status for `gap_set_security_mode` 364- GAP: abort legacy pairing if Level 4 is required 365- GAP: abort SSP on IO Capabilities Request event if Level 4 is required but SC not supported by remote 366- GAP: abort SSP on User Confirmation Request event if Level 3 is required but MITM protection not possible 367- GAP: validate minimal service security level can be reached during pairing in responder role 368- L2CAP: don't trigger hci disconnect if l2cap security requirements are insufficient 369- CVE-2020-26555: reject connections to and from devices with same BD ADDR 370- CVE-2020-26555: ignore NULL link key 371- CVE-2020-26558: abort LE Secure Connection pairing if remote uses the same public key 372 373## Release v1.4 374 375### Added 376- HCI: `btstack_transport_sco.h` supports SCO over physical PCM/I2S interface (`HAVE_SCO_TRANSPORT`) 377- POSIX: `btstack_transport_sco_i2s_test_bridge.c` implements SCO transport interface for UART-to-I2S test bridge 378- btstack_uart: `btstack_uart_t` interface extends `btstack_uart_block_t`: 379 - support sending and receiving SLIP frames for HCI H5 380 - support odd parity 381 - `hci_transport_h4` and chipset drivers have new functions to provide `btstack_uart_t` 382- btstack_uart_slip_wrapper: wrapper that implements SLIP functionality for existing `btstack_uart_block` drivers. 383- hci_transport: add parity field and pass on to `btstack_uart_t` in h4 and h5 384- GATT Client: Battery Service Client 385- GATT Client: Device Information Service Client 386- GATT Client: HID-over-GATT (HOG) Client, Report and Boot Host 387- GATT Client: Scan Parameters Service Client 388- GATT Server: Scan Parameters Service Server 389- GAP: support scan page configuration with `gap_set_page_scan_activity` and `gap_set_page_scan_type` 390- GAP: support sniff subrating with `gap_sniff_subrating_configure` 391- GAP: support QoS setup with `gap_qos_set` 392- AVRCP: new field `button_pressed` in `AVRCP_SUBEVENT_OPERATION` 393- AVRCP: `AVRCP_SUBEVENT_OPERATION` emitted for button release 394- AVRCP Controller: `avrcp_controller_start_press_and_hold_cmd` supports arbitrary device buttons 395- AVRCP Controller: reassemble fragmented AVCTP packets 396- AVDTP: `avdtp_register_media_config_validator` allows to validate media codec configuration 397- A2DP Source: `ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG` disables auto config. requires call to `a2dp_source_set_config_{CODEC}` 398 399### Fixed 400- GAP: calculate IO Cap AuthReq Bondable Mode based on `gap_ssp_set_authentication_requirement` and `gap_set_bondable_mode` 401- GAP: only store link key for SSP if remote side has set bondable in io cap auth requirements 402- GAP: allow to disable link supervision timeout 403- GAP: fix `gap_connect` after `gap_connect_cancel` 404- GAP: re-configure advertisements after power cycle 405- HCI: handle start inquiry failure 406- L2CAP: fix create outgoing connection triggered from packet handler on hci disconnect event 407- L2CAP: return unknown mandatory option in config response 408- AVDTP: fix spelling `avdtp_set_preferred_sampling_frequency` 409- AVRCP Target: fix notification changed event 410- HFP: Emit audio connection released on SLC Release, e.g. on remote power off 411- HFP HF: fix audio connection setup if codec negotiation is supported 412- HFP HF: only emit single event for RING and AG Status updates 413- HFP AG: fix audio connection setup for in-band ringtone on incoming connection 414 415### Changed 416- Port Archive: moved ports that are not recommended for new designs to port/archive folder: 417 - MSP430: the ports used the older community GCC version without 20-bit support needed for code size > 64kB 418 - Broadcom/Cypress H5: uploading PatchRAM is only possible in H4 mode. It's better to also use H4 in general 419 - PIC32-Harmony: the port used Harmony v1 while Harmony v3 has been out since a while 420 - iOS: not supported 421- Run Loop Base: functionality used in most platform run loop implementations 422 - code from `btstack_run_loop_base.c` moved into `btstack_run_loop.c` to minimize changes to build systems 423 - `btstack_run_loop_base.c` is a placeholder and can be removed from build 424- HCI Dump: replace monolithic `hci_dump.c` (with many #ifdefs) into dispatcher with platform-specific implementations: 425 - `posix/hci_dump_posix_fs` - writes binary log file 426 - `posix/hci_dump_stdout` - log to console using printf with local system time 427 - `embedded/hci_dump_embedded_stdout` - log to console using printf 428 - `embedded/hci_dump_segger_stdout` - log to RTT console using `SEGGER_printf` 429 - `embedded/hci_dump_segger_binary` - writes binary log over RTT to host 430- HCI: config I2S for BCM Controllers if `ENABLE_SCO_OVER_PCM`, reduce bit clock to 256/512 kHz 431- btstack_uart_posix: supports SLIP frames and replaces `btstack_uart_block_posix` 432- hci_transport_h5: more performant H5 implementation that requires `btstack_uart_t` driver with SLIP support 433- POSIX Ports: use new `btstack_uart_posix` implementation 434- posix-h5/posix-h5-bcm: use even parity for UART 435- HCI Transport: extract convenience function declaration for h4, h5, em9304_spi, and usb into separate hci_transport_{type}.h 436- GAP: provide Device ID from EIR in GAP_EVENT_INQUIRY_RESULT 437- GAP: only store link key if it allows requested security level 438- GAP: abort SSP pairing if MITM protection required but not possible 439- SM: start pairing as Central for already encrypted connection on Slave Security Request 440- GATT Client: Use ATT_READ_REQUEST for first blob of Read Long Characteristic and Read Long Characteristic Descriptor 441- GATT Server: Allow ATT Read Callback to return custom ATT Error Code 442- Nordic SPP Service Server: use `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` and `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` 443 events instead of callback, and `RFCOMM_DATA_PACKET` for received data 444- u-blox SPP Service Server: use `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` and `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` 445 events instead of callback, and `RFCOMM_DATA_PACKET` for received data 446- HID: Move `src/classic/hid.h` into `src` and prefix with `btstack_` to use it with BLE and avoid name clashes 447- HFP: provide acl_handle in events to identify connection 448- HSP AG: emit HSP_SUBEVENT_BUTTON_PRESSED instead of audio connection setup/release 449- Example: use `btstack_event.h` getters instead of direct array access, use enum to compare status codes 450 451 452## Release v1.3.2 453 454### Added 455- GAP: support for Classic Out-of-Band (OOB) pairing via `gap_ssp_remote_oob_data` with `ENABLE_CLASSIC_OOB_PAIRING` 456- GAP: read local OOB data on start and on call to `gap_ssp_generate_oob_data`, provided via `GAP_EVENT_LOCAL_OOB_DATA` 457- HID Host: add profile, update `hid_host_demo.c` example 458 459### Fixed 460- L2CAP: make handling of HCI disconnect more robust 461- AVDTP: emit stream release for active stream if signaling connection is closed first, e.g. caused by HCI disconnect 462- AVRCP: fix issue when Controller and Target send at the same time 463 464### Changed 465- A2DP, AVDTP: use `a2dp_source_set_config_{TYPE}` and `avdtp_config{TYPE}_store` to avoid large number of parameters 466 467 468## Release v1.3 469 470### Added 471- CC256x: with ENABLE_CC256X_ASSISTED_HFP, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 472- BCM: with ENABLE_BCM_PCM_WBS, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 473- SDP Client RFCOMM: add `sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid` 474- HFP: `ENABLE_HFP_AT_MESSAGES` lets HFP emit `HFP_SUBEVENT_AT_MESSAGE_SENT` and `HFP_SUBEVENT_AT_MESSAGE_RECEIVED` 475- A2DP, AVDTP: provide capabilities and configuration events for A2DP codecs: SBC, MPEG Audio, MPEG AAC, ATRAC 476- A2DP + AVDTP Source: allow to send media packet with `avdtp_source_stream_send_media_packet` and `a2dp_source_stream_send_media_packet` 477- A2DP + AVDTP Source: add `avdtp_source_stream_send_media_payload_rtp` and `a2dp_source_stream_send_media_payload_rtp` 478- A2DP Source: emit `A2DP_SUBEVENT_SIGNALING_CAPABILITIES_COMPLETE` 479- A2DP Source: allow to configure endpoints by calling `a2dp_source_set_config_{TYPE}` during SEP discovery with SBC fallback 480 481### Fixed 482- HCI: keep `le connecting request` on connection complete active, fixes gap_auto_connection_stop() + gap_auto_connection_start() 483- L2CAP: fix packet size check for incoming classic basic channels (regression introduced in v1.2.1) 484- HFP AG/HSP AG: avoid connecting to remote service with same role 485- A2DP Source: support multiple Stream Endpoints with different Media Codec types 486- A2DP Source: emit codec configure event with reconfigure flag set on reconfigure 487- GATT Compiler: support multiple instances of the same service 488 489### Changed 490- GAP: provide Link Type parameter to incoming connection filter for `gap_register_classic_connection_filter` 491- HFP/GOEP Client/AVDTP/A2DP: return `SDP_SERVICE_NOT_FOUND` if no suitable SDP record is found 492- AVDTP Source: `avdtp_source_stream_send_media_payload` includes SBC Header and was deprecated 493- AVDTP/A2DP: use `avdtp_channel_mode_t` in `A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION` 494- A2DP: fix events and use `a2dp_cid`, `local_seid,` `remote_seid` field names in A2DP sub-events 495- GATT Client: Skip MTU exchange after MTU exchange on ATT Server 496- Ports: STM32-F103RB Nucleo + CC256x port removed 497- ESP32: enabled HFP Wide-Band Speech, disable classic secure connections in HSP/HFP demos 498 499 500## Release v1.2.1 501 502### Fixed 503- L2CAP: use connection handle for channel lookups 504- L2CAP: forward data only in open state 505 506### Changed 507- L2CAP: check packet size against local mtu for classic basic channels 508 509 510## Release v1.2 511 512### Fixed 513- L2CAP: trigger pairing for outgoing LE Data Channels if security level insufficient 514- SM: fix update of sc flag for re-encrypted connection in peripheral role 515- SM: send security request on re-connect if bonded and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is defined 516- ESP32: fix audio sink driver 517 518### Added 519- GAP: `gap_delete_bonding` removes device from LE Resolving List and from discards LE bonding information 520- GATT Client: delete bonding information if re-encryption fails and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is not defined 521- GATT Client: gatt_client_set_required_security_level() allows to set required minimum security level for all GATT requests 522- SM: emit events for re-encryption started/complete when bonding information is available 523 524### Changed 525- AVRCP Controller: allow to send multiple absolute volume commands without waiting for response. 526- GAP: replaced `ENABLE_LE_CENTRAL_AUTO_ENCRYPION` with `ENABLE_LE_PROACTIVE_AUTHENTICATION` 527 528 529## Changes October 2020 530 531### Fixed 532- AVDTP Initiator: avoid use of remote seid for stream endpoint lookup, fixes issue with two connected devices 533- AVDTP Source: buffer for SBC media codec information got discarded, leading to invalid Set Configuration command in second connection 534- SM: only trigger Cross-Transport Key Derivation (CTKD) when bonding is enabled 535- SM: set LinkKey flag to request CTKD if enabled 536- SM: store CTKD key with Public Identity Address 537- SM: only allow CTKD to overwrite existing link key if derived key has same or higher authentication 538- SM: start SMP Timeout when sending Security Request 539- HFP HF: fix response to AG Codec Selection while waiting for OK of parallel command 540- HCI: fix reject of LE remote connection param request via HCI 541 542### Added 543- GAP: add `gap_get_link_key_for_bd_addr` 544- GAP: add `gap_bonded` to check if bonding information is available for active connection 545- SM: support h7 for CTKD 546 547### Changed 548- SM: Cross-Transport Key Derivation requires `ENABLE_CROSS_TRANSPORT_KEY_DERIVATION` now 549- SM: block connection if encryption fails for bonded devices as Central 550- SM: support pairing as Central after failed re-encryption 551 552 553## Release v1.1 554 555### Fixed 556- AVRCP/AVCTP: report AVRCP 1.6 and AVCTP 1.4 in SDP record 557 558### Added 559 560### Changed 561 562 563## Changes September 2020 564 565### Fixed 566- HFP: fix parsing of ranges e.g. in +CIND responses 567- AVDTP, AVRCP: fix bugs due to transaction id overrun 568- A2DP Source: fix issues with stream configuration by sink 569- hci_dump: fix tv_us calculation for non-posix / embedded systems with binary output 570 571### Added 572- `btstack_ring_buffer`: add `btstack_ring_buffer_reset` to reset it to initial state/empty 573- GAP: Support for address resolution of resolvable private addresses by Controller with `ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION` 574 575### Changed 576- AVDTP, AVRCP, HSP: schedule SDP query, avoids avoids 'command disallowed' if SDP client is busy 577- HSP, HFP: allow to configure usable SCO packet types 578- cc256x: update CC256xC init script to v1.4 579- A2DP Source: use Get All Capabilities if supported by remote get Delay Reporting capability 580 581## Changes August 2020 582 583### Fixed 584- ESP32: fix authentication for incoming Secure Connections 585- AVDTP: Fix forwarding of Delay reports 586- STM32-F4Discovery: fix pan_lwip_http_server by increasing HCI_ACL_PAYLOAD_SIZE 587- tool/create_packet_log: basic support for 16-bit Unicode log files from Windows 588 589### Added 590- `btstack_run_loop_base`: added `btstack_run_loop_base_dump_timer` 591- GAP: request role change for classic connection via `gap_request_role` 592- GAP: LE Whitelist API with `gap_le_whitelist_x` with x = add, remove, clear and new `gap_connect_with_whitelist` 593- SDP Client: add sdp_client_register_query_callback() allows to register query request instead of polling sdp_client_ready() 594- BNEP lwIP: add `bnep_lwip_connect` to establish BNEP connection and manage lwIP network interface 595- New `btstack_linked_queue` utility, a linked list-based queue with first-in-first-out semantics and constant time enqueue/dequeue operations 596- btstack_tlv_posix: add `btstack_tlv_posix_deinit` 597- New `btpclient` for use with [auto-pts project](https://github.com/intel/auto-pts) 598 599### Changed 600- GAP: treat AES-CCM encrypted connection as mutually authenticated (BIAS) 601- GAP: 'gap_auto_connect_x' API deprecated. Please directly manage LE Whitelist with `gap_le_whitelist_*` functions and call `gap_connect_with_whitelist` instead 602- example/hid_host_demo: try to become master for incoming connections 603- btstack_run_loop: use btstack_assert instead of local while(true) 604- att_db_util: allow to reset att_db via `att_db_util_init` 605 606## Changes July 2020 607 608### Fixed 609- AVDTP: fix invalid response for Get Capabilities request if Delay Reporting was supported 610- AVDTP: handle concurrent signaling establishment with reject and retry 611 612### Added 613- example/hid_host_demo: support reconnect from HID device 614- Crypto: support software AES128 for AES-CCM operations 615- AVRCP: introduced AVRCP_FEATURE_MASK_* as alternative to avrcp_controller_supported_feature_t and avrcp_target_supported_feature_t enums 616- btstack_audio: add set_volume() to sink and set_gain() to source interfaces, minimal volume control for portaudio playback 617- 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 618- GAP: Provide gap_get_role to query master/slave role for HCI connection handle 619- GAP: Provide gap_pin_code_response_binary to use binary data as PIN, e.g. for pairing with Nintendo Wii Remote 620 621### Changed 622- GAP: set minimum required encryption key size for Classic connections back from 16 to 7, matching the Core spec 623 624 625## Changes June 2020 626 627### Fixed 628- HFP: Fix parsing of empty fields, e.g. phone number in +CLCC and other AT commands 629- SM: Fix validation of confirm value for secure connection Passkey entry 630- AVRCP: handle concurrent signaling establishment with reject and retry 631 632### Added 633- GAP: Detect Secure Connection -> Legacy Connection Downgrade Attack by remote features and actual encryption type (BIAS) 634- GAP: Mutual authentication: request authentication after Classic connection got encrypted (BIAS) 635- Windows port for Dialog DA14585 connected via serial port 636 637## Changes 638- CVSD PLC: treat zero frames as good and allow to mark data as bad, e.g. if reported by Controller as erroneous 639 640## Changes May 2020 641 642### Fixed 643- hfp_hf, hsp_hs: use eSCO params in accept sco connection only for incoming eSCO connections 644- pbap_client: fix PBAP UUID len on connect message 645- SM: fix secure connection pairing as peripheral when local user confirmation happens after remote one 646- A2DP Source: only connect to remote sink stream endpoints 647- btstack_hal_flash_memory: fix write of 0xff bytes to simulated flash 648- hsp_hs: fix disconnect if audio not connected 649- hsp_ag: fix accept incoming connection 650 651### Added 652- example/le_mitm: MITM implementation that forwards ATT PDUs and allows for pairing 653- GAP: gap_set_security_level sets required security level for incoming and outgoing connections 654- cc256x: allow to specify power vector for each modulation type 655- FreeRTOS: btstack_run_loop_freertos_trigger_exit allows to request run loop exit 656- SM: support LE Secure Connections Only mode with sm_set_secure_connections_only_mode 657- GAP: enable BR/EDR Secure Connections if supported, add gap_secure_connections_enable 658 659### Changed 660- L2CAP ERTM: send extended features request only once per HCI connection 661 662 663## Changes April 2020 664 665### Fixed 666- hog_mouse_demo/hog_keyboard_demo: handle set protocol mode = boot protocol mode 667- HCI: only update BD_ADDR placeholder in shortened and complete name in EIR data, limit device name to 240/248 bytes 668 669### Added 670- GAP: gap_set_allow_role_switch allows to prevent role switch in outgoing classic ACL connections 671- example: hog_boot_host_demo implements an HID-over-GATT Boot Host that supports keyboard and mouse 672- HCI: add ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS that forces fragmentation of ACL-LE packets to fit into over-the-air packet 673 674### Changed 675- Broadcom/Cypress: wait 300 ms after PatchRAM update in hci.c to assert Controller is ready 676- esp32: provide esp-idf/component/btstack/btstack_port_esp32.c and only minimal app_main in template/main/main.c 677- att_db: skip att_read_callback for ATT Read Blob Request if offset == value_len 678 679 680## Changes March 2020 681 682### Fixed 683- GAP: fixed gap_set_scan_parameters() if issued right before gap_start_scan() 684- HCI: only send HCI Read Local Encryption Key Size if supported by Controller 685 686### Added 687- GATT Client: allow to register for any notification/indication and/or any connection 688- HCI: added hci_read_inquiry_scan_activity and hci_write_inquiry_scan_activity commands 689- chipset: assert hci packet buffers are suitable for firmware upload or patches (atwilc3000,bcm,cc256x,intel) 690- btstack_util: added btstack_replace_bd_addr_placeholder 691 692### Changed 693- AVRCP Target: volume in avrcp_target_volume_changed is reported as current value in interim response to register for volume change notifications 694- SDP Client: query attributes 0x0000..0xffff instead of 0x0001..0xffff to match other stacks / improve compatibility with bad sdp server implementations 695 696 697## Changes Februar 2020 698 699### Fixed 700- AVRCP Target: fix reporting of PLAYBACK_STATUS_CHANGED 701- HCI: handle reconnect request for Classic and LE connections triggered by packet handler for Disconnection Complete Event 702 703### Changed 704- hid_host_mode: allow sniff mode 705 706### Added 707- 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 708 709 710## Changes January 2020 711 712### Fixed 713- L2CAP ERTM: avoid read-after-free on decline of incoming connection 714- GATT Client: set uuid16 to zero when deserializing uuid128 services, characteristics, and descriptors 715- att_db_util: fix realloc of att db buffer for large attributes 716- btstack_tlv_posix: only keep last value in memory, fix delete operation 717- l2cap_signaling: use packet boundary flags 0x00 for LE signaling packets (ignoring hci_non_flushable_packet_boundary_flag_supported()) 718 719### Added 720- att_db_util: provide GATT Database Hash via att_db_util_hash_calc 721- GATT Compiler: provide GATT Database Hash via GATT_DATABASE_HASH Characteristic 722- ATT Server: validate request pdu length 723 724### Changed 725- Crypto: update AES-CMAC implementation to access all message bytes sequentially 726 727 728## Changes December 2019 729 730### Fixed 731- example/pan_lwip_http_server: use Network Access Point, CoD 732- sm: emit pairing complete in master role when no keys are distributed / bonding disabled 733 734### Added 735 736### Changed 737- Updated CC256x initscript: CC256xC v1.3 738- ESP32: add CMake project files 739 740 741## Changes November 2019 742 743### Fixed 744- AVDTP Source: return correct `avdtp_cid` and `local_seid` in `AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW` 745- L2CAP: send LE Data Channel SDUs round robin with other data 746- L2CAP ERTM: send ERTM I-frames round robin with other data 747 748### Added 749- ATT Server: return error if request to send now for Notification or Indication already registered 750- Linked List: return if item was added for `btstack_linked_list_add[_tail]` 751- btstack_run_loop_remove: return bool true if timer/data source was removed 752- segger-rtt: allow to configure with `SEGGER_RTT_PACKETLOG_*` directives, update to v6.54 753- GAP: support setting Link Supervision Timetout for outgoing Classic connections using `gap_set_link_supervision_timeout` 754- lwip: add download test files to http server demo 755 756### Changed 757- Linked List: return bool true if item was removed 758 759 760## Changes October 2019 761 762### Fixed 763 764### Added 765- `btstack_bool.h`: provide boolean type 'bool' via `<stdbool.h>` or as backport 766- provide `btstack_assert(condition)` 767- H4 Transport: avoid calling `hci_transport_h4_trigger_next_read` when transport is closed 768 769### Changed 770- libusb and posix ports: store bonding information in TLV 771 772 773## Changes September 2019 774 775### Fixed 776- L2CAP ERTM: assert that packet can be stored in fragment buffers in ertm 777- L2CAP ERTM: reject incoming connection if ERTM is configured as mandatory but not supported by remote 778- GATT Client: allow Write Without Response independent of other requests 779 780### Added 781- GAP: allow to reject GAP classic connection via gap_register_classic_connection_filter 782- GAP: support reading RSSI for Classic+LE using gap_read_rssi. Emits `GAP_EVENT_RSSI_MEASUREMENT` 783 784### Changed 785- Bluetooth and BTstack Error Codes and Events: collect status codes in bluetooth.h and events in btstack_defines.h 786- bluetooth.h: extract internal defintitions to respective protocol layers 787- Updated CC256x initscripts (CC256xB v1.8, CC256xC v1.2, CC256xC v1.2) 788 789 790## Changes August 2019 791 792### Fixed 793- POSIX, WICED, Windows, FreeRTOS run loops: handle time_ms overrun after 49 days 794- RFCOMM: accept incoming L2CAP connection in Basic mode if ERTM is enabled but not requested for this connection 795- RFCOMM: limit RFCOMM MTU by local L2CAP MTU for outgoing connections (only revelvant for ERTM) 796- L2CAP ERTM: stop timers on disconnect 797- L2CAP ERTM: fix sending of segmented SDUs 798- L2CAP ERTM: handle unsupported Information Response 799- SM: generate local nonce for confirm value in JW+NC+PK in Secure Connections Responder role 800 801### Added 802- `btstack_run_loop_base`: portable implementation of timer and data source management as base for platform specific implementations 803 804## Changed 805- FreeRTOS: use xQueueCreateStatic (static variant of xQueueCreate) if available for static memory-only setups 806- L2CAP ERTM: handle invalid Information Response (assume no extended features supported) 807- POSIX: use monotonic clock as timebase if available 808- HCI Transport H4/H5/EM9304 SPI: ignore block read/sent from UART driver when closed 809- HCI: Read Encryption Key Size after encryption was enabled 810- Errata 11838: 811 - GAP: gap_set_required_encryption_key_size allows to set the required key size, default = 16 (max) 812 - GAP: validate encryption key size to emit GAP Security Levels 813 814## Changes July 2019 815 816### Fixed 817- SM: Fixed regression introduced in f3582630 818- L2CAP: avoid reading l2cap signaling command len out of bounds 819- HCI Transport H4/H5/EM9304 SPI: fix payload size checks (also for 8/16-bit platforms) 820 821### Changed 822- SM: Start encryption upon receiving slave securiy request if bonded 823- hci: use 2 as HCI_INCOMING_PRE_BUFFER_SIZE in LE-only configuration for GATT Client 824 825--- 826 827## Changes June 2019 828 829### Changed 830- FreeRTOS: use freertos/.. prefix to include FreeRTOS headers if HAVE_FREERTOS_INCLUDE_PREFIX is defined 831- BNEP: add Connection Handle to BNEP_EVENT_CHANNEL_OPENED 832- Examples: renamed le_counter to gatt_counter and le_streamer to le_streamer_server to indicate support for GATT over BR/EDR 833 834### Fixed 835- BNEP: Bluetooth address is stored in little-endian format for all BNEP_EVENT_* 836- libusb: avoid use-after-free for SCO packets on disconnect 837 838### Added 839- example: pan_lwip_http_server using lwIP as network stack to implement PAN NAP service 840- platform/lwip/bnep_lwip.c: BNEP lwIP adapter that forwards packets between BNEP service and lwIP 841- ENABLE_GATT_OVER_CLASSIC enables support for GATT over BR/EDR in att_server 842 843--- 844 845## Changes May 2019 846 847### Changed 848- ESP32: Configure SCO over HCI after power up 849- btstack_tlv_flash_bank: support targets where a value cannot be overwritten with zero. When ENABLE_TLV_FLASH_EXPLICIT_DELETE_FIELD 850 is defined, an explicit delete field is used to indicate an invalid entry. 851 852### Fixed 853- SM: Avoid potential use-after-free on immediate disconnect (lookup connection via con handle instead of storing pointer) 854 855### Added 856- gatt_client: emit query complete event for signed write operation 857- hci_transport_h4: add workaround for flow control bug in CYW2070x, enable with ENABLE_CYPRESS_BAUDRATE_CHANGE_FLOWCONTROL_BUG_WORKAROUND 858 859--- 860 861## Changes April 2019 862 863### Changed 864- ESP32: use micro-ecc from 3rd-party as esp-idf removed it in their 3.3 release 865 866### Fixed 867- hci: pad LE Scan response with zeroes 868- SM: store local CSRK 869- ATT DB: call write callback for validated signed writes 870- ATT Server: abort signed write validation on incoming new request 871- Bluetooth SIG web scraping tools updated 872- libusb: compiles for FreeBSD 873 874### Added 875 876--- 877 878## Changes March 2019 879 880### Changed 881- use Makefile for stm32-f4discovery-cc256x port 882- le_device_db: add secure_connection argument to le_device_db_encryption_set and le_device_db_encryption_get 883 884### Fixed 885- SM: Use provided authentication requirements in slave security request 886 887### Added 888- port/stm32-f4discovery-cc256x: add support for built-in MEMS microphone 889- SM: Track if connection encryption is based on LE Secure Connection pairing 890- ATT DB: Validate if connection encrypted is based on SC if requested 891- att_db_util: support ATT_SECURITY_AUTHENTICATED_SC permission flag 892- GATT Compiler: support READ_AUTHENTICATED and WRITE_AUTHENTICATED permsission flags 893- ESP32: erase nvs flash is newer nvs version found 894- libusb: add support for nRF52840-PCA10056 running Zephyr hci_usb example 895- port/stm32-l073rz-nucleo-em9304 for Nucleo L073RZ with EM9304 DVK, replaces port/stm32-l053r8-nucleo-em9304 896 897## Changes February 2019 898 899### Changed 900- example/a2dp_sink_demo: use linear resampling to fix sample rate drift 901- btstack_audio: split interface into sink and source 902 903### Fixed 904- Crypto: fix lockup when stack is shutdown while waiting for result of HCI Command, e.g. LE Read Local P256 Public Key 905- SM: Avoid SM_EVENT_PAIRING_COMPLETE with ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION after successful pairing in responder role 906 907### Added 908- example/a2dp_sink_demo: add target role, support volume control on both devices 909- example/audio_duplex: playback audio audio source on audio sink (test audio path) 910- btstack_audio_embedded: implement audio source path 911 912--- 913 914## Changes January 2019 915 916### Changed 917- L2CAP: provide channel mode (basic/ertm) and fcs option in L2CAP_EVENT_CHANNEL_OPENED 918- RFCOMM: support L2CAP ERTM. Callbacks passed to rfcomm_enable_l2cap_ertm() are used to manage ERTM buffers 919 920### Added 921- L2CAP: emit L2CAP_EVENT_ERTM_BUFFER_RELEASED if ERTM buffer not needed/used anymore 922- L2CAP: add fcs_option to ERTM config l2cap_ertm_config_t 923- HCI: validate advertisement data length field when generating GAP_EVENT_ADVERTISING_REPORT 924- ad_parser: validate data element length fields in ad_iterator_has_more 925- Raspberry Pi 3 A+/B+ port in port/raspi, starts without power cycle 926 927### Fixed 928- HCI: release outgoing buffer on disconnect if waiting to send another ACL fragment 929- POSIX: use correct baudrate enums for baud rates higher than 921600 (Linux) 930- Crypto: directly process queued crypto operation on HCI result 931 932--- 933 934## Changes December 2018 935 936### Added 937- SM: generate and store ER / IR keys in TLV, unless manually set by application 938- hci_dump: support PacketLogger or BlueZ format output via SEGGER RTT Channel 1 Up 939 940### Fixed 941- SM: fix internal buffer overrun during random address generation 942 943## Changes November 2018 944 945### Added 946- GAP: gap_le_connection_interval provides connection interval for conn handle 947- Nordic SPP Service Server: GATT service that emulates a serial port over BLE based on Nordic Semiconductor documentation. 948- uBlox SPP Service Server: GATT service that emulates a serial port over BLE based on uBlox documentation. 949- SM: ENABLE_LE_CENTRAL_AUTO_ENCRYPTION triggers automatic encryption on connect to bonded devices 950- SM: generate and store ER / IR keys in TLV, unless manually set by application 951 952### Fixed 953- SM: prevent random address updates if gap_random_address_set was used 954- SM: fix internal buffer overrun that can cause storing of bonding information to fail 955- SM: ignore Slave Security Request after sending own Pairing Request 956- L2CAP: fix use after free on disconnect if ERTM is enabled 957- HFP: Handle multiple commands/responses in single RFCOMM packet 958- Memory Pools: clear all buffers before use 959 960--- 961 962## Changes October 2018 963 964### Added 965- SDP Server: queue incoming connections when already connected instead of rejecting them 966- 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. 967- HIDS Device: GATT service that exposes HID reports intended for HID Devices, like keyboard and mouse. 968 969### Fixed 970- HCI: fix bug in gap_inquiry_stop that triggered additional GAP_EVENT_INQUIRY_COMPLETE instead of stopping the inquiry 971- L2CAP: fix issue with outgoing connection before read remote supported complete when other channels exist 972- L2CAP ERTM: allow SDU of szie MPS in first packet that contains L2CAP SDU Length 973- L2CAP ERTM: fix memory corruption triggered if local_mtu > mps 974- L2CAP ERTM: fix outgoing fragment management 975- HFP: decline incoming RFCOMM connection after outgoing connection was started 976- AVRCP: fix crash on disconnect of connection established by remote 977 978--- 979 980## Changes September 2018 981 982### Fixed 983- HCI: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 984- L2CAP: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 985- L2CAP: Evaluate 'can send now' on HCI Disconnect as ACL buffers in Bluetooth Controller have been used for the closed connection are freed implicitly 986- L2CAP: Check can send now before sending extended information requeste needed for ERTM mode 987- L2CAP: Use valid signaling identifier for L2CAP Connection Parameter Update Request 988- 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 989- RFCOMM: Avoid use-after-free on channel finalize 990- GATT Client: stop timer on disconnect - fixes use after free / crash 991 992### Added 993- A2DP Source: Support stream reconfiguration (a2dp_source_reconfigure_stream_sampling_frequency) 994- 3rd-party: yxml is used for PBAP vCard list parsing 995- cc256xC: new v1.1 init scripts 996 997--- 998 999## Changes August 2018 1000 1001### Added 1002- PBAP: added pbap_get_phonebook_size() to get phonebook entry count 1003 1004### Fixed 1005- GATT Server: Allow enable Notifications/Indication with Write Command. Fixes issue with some Android devices. 1006- SM: fix pairing for Secure Connections with Bonding if remote sends additional keys 1007- SM: drop LTK flag from Pairing Response for Secure Connections 1008- L2CAP: fix emitted L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 1009 1010## Changes June 2018 1011 1012### Added 1013- btstack_audio.h: application level API for audio playback and recording 1014- embedded/hal_audio.h: low-level API for audio playback and recording 1015- HID Device: hid_device_connect(..) function 1016- ESP32: implement hal_audio 1017- DA14585: support for Dialog Semiconductor DA14585 LE-only controller 1018- Raspberry Pi 3 + Raspberry Pi Zero W port in port/raspi 1019 1020### Changed 1021- Errata 10734: 1022 - SM: Generate new EC Public Keypair after each pairing 1023 - SM: Abort failure with DHKEY_CHECK_FAILED if received public key is invalid (instead of unspecified error) 1024- btstack.h: only include classic headers if ENABLE_CLASSIC is defined 1025- windows: ignore virtual Bluetooth adapter provided by VMware 1026- Replaced HCI_PACKET_BUFFER_SIZE with HCI_INCOMING_PACKET_BUFFER_SIZE and HCI_OUTGOING_PACKET_BUFFER_SIZE 1027 1028--- 1029 1030## Changes June 2018 1031 1032### Fixed 1033- HFP: Fix Wide Band Speech bit in SDP record for both HF/AG. Missing bit prevents macOS from using mSBC 1034- ATT Server: send ATT_EVENT_HANDLE_VALUE_INDICATION_COMPLETE with status ATT_HANDLE_VALUE_INDICATION_DISCONNECT on disconnect 1035- AVRCP Controller: fix parsing of now playing info 1036 1037### Changed 1038- ATT Server: ATT_HANDLE_VALUE_INDICATION_DISCONNECT is delivered to service handler if registered 1039 1040### Added 1041- ATT Server: packet handler field added to att_service_handler_t to receive: connect/disconnect, atu exchange, indication complete 1042 1043--- 1044 1045## Changes May 2018 1046 1047### Added 1048- GAP: re-encrypt outgoing connection if bonded 1049- ATT Server: wait until re-encryption is complete 1050- GATT Client: wait until re-encryption is complete 1051- ATT Server: added att_server_request_to_send_notification and att_server_request_to_send_indication 1052- GATT Client: if ENABLE_GATT_CLIENT_PAIRING, GATT Client starts pairing and retry operation on security error 1053 1054### Changed 1055- ATT Server: att_server_register_can_send_now_callback is deprecated, use att_server_request_to_send_notification/indication instead 1056 1057### Fixed 1058- SM: Fix LE Secure Connection pairing in Central role 1059- le_device_db_tlv: fix seq nr management 1060- SM: improve le_device_db lookup and storing of IRK 1061- GATT Server: fix lookup for Client Characteristic Configuration in services with multiple Characteristics 1062- RFCOMM: emit channel closed on HCI/L2CAP disconnect after sending DISC while expecting UA 1063 1064--- 1065 1066## Changes April 2018 1067 1068### Added 1069- Crypto: btstack_crypo.h provides cryptographic functions for random data generation, AES128, EEC, CBC-MAC (Mesh) 1070- SM: support pairing using Out-of-Band (OOB) data with LE Secure Connections 1071- Embedded: support btstack_stdin via SEGGER RTT 1072 1073### Changed 1074- att_db_util: added security requirement arguments to characteristic creators 1075- SM: use btstack_crypto for cryptographpic functions 1076- GAP: security level for Classic protocols (asides SDP) raised to 2 (encryption) 1077 1078### Fixed 1079- HFP: fix answer call command 1080- HCI: fix buffer overrun in gap_inquiry_explode 1081- SDP: free service record item on sdp_unregister_service 1082 1083## Changes March 2018 1084 1085### Added 1086- GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections 1087- ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c 1088- ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated 1089 1090### Fixed 1091- RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1) 1092- HSP HS: accept incomming SCO connection 1093- SM: fix iteration over LE Device DB entries for bonding and address resolving 1094- SM: store pairing information only if both devices have requested bonding 1095 1096--- 1097 1098## Changes February 2018 1099 1100### Added 1101- GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE 1102- SM: new event SM_EVENT_PAIRING_COMPLETE 1103- GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done 1104- GAP: add gap_delete_all_link_keys 1105 1106### Changed 1107- GATT Client: round robin for multiple connections 1108- ATT Dispatch: round robin for ATT Server & GATT Client 1109- L2CAP: round robin for all L2CAP channels (fixed and dynamic) 1110- btstack_link_key_db: addition functions for link key iteration 1111- GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up 1112- CSR: set all keys in psram instead of default 1113 1114### Fixed 1115- tc3556x: fix startup after baud rate change 1116 1117--- 1118 1119## Changes January 2018 1120 1121### Added 1122- Port for Windows with Zephyr HCI Firmware connected via serial port 1123- em9304: upload patch containers during HCI bootup 1124- Makefile for STM32-F4Discovery port 1125- support for console out via SEGGER RTT 1126- LE Data Channels example in BTstack and [iOS example on GitHub](https://github.com/bluekitchen/CBL2CAPChannel-Demo) 1127- LE Streamer Client can send as fast as possbile as well 1128- L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu 1129 1130### Changed 1131- HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave) 1132- GAP: gap_set_connection_parameters includes scan interval and window params 1133- GATT Client: GATT_EVENT_MTU indicates max MTU 1134- ATT DB Util: attribute handle is returned for new Services and Characteristics 1135 1136### Fixed 1137- Windows: retry serial port operations if not all bytes have been read/written 1138- HFP: avoid buffer overflows setting up messages 1139- SBC Decoder: improved error handling for invalid SBC audio data 1140- GAP: fix Connection Parameter Response in Central role 1141- ATT DB Util: update pointer to database in case of realloc 1142- GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128 1143- GAP: release HCI Connnection after gap_le_conne 1144- ATT: Exchanged MTU is propagate to ATT Server and GATT Client 1145 1146--- 1147 1148## Changes December 2017 1149 1150### Added 1151- Introduced btstack_network.h network interface abstraction 1152- btstack_network_posix implementation using Linux tun/tap interface 1153- WICED: support for btstack_stdin (HAVE_STDIN) 1154- 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. 1155- TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h) 1156- TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c 1157- LE Device DB TLV: overwrite oldest entry if no free entries available 1158- SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role 1159- Example/hid_host_demo with HID parser and support for basic US keyboard layout 1160- 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 1161- Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304) 1162 1163### Changed 1164- panu_demo: uses btstack_network.h now 1165- WICED: configure printf to replace Linefeed with CRLF 1166- SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations 1167 1168### Fixed 1169- RFCOMM: support connection requests during connection failure 1170- L2CAP: support connection requests during connection failure 1171- L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU) 1172- HCI: avoid double free during halting 1173- SM: fixed reconnect using legacy pairing in slave role 1174 1175 1176