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- GATT Client: gatt_client_add_service_changed_handler to receive Service Changed and Database Hash events 13- GATT Client: various _with_context functions that provide a service + connection id to GATT query events 14- GATT Service Client: generic client discovers characteristics and enabled notifications/indications 15- L2CAP: provide access to number of available credits in CBM/ECBM 16- HFP HF: support Apple Accessory information with: 17 - hfp_hf_apple_set_identification 18 - hfp_hf_apple_set_battery_level 19 - hfp_hf_apple_set_docked_state 20- HFP AG: report Apple Accessory information, battery level and docked state 21- AVRCP: Support browsing in Target role 22- PBAP Client: allow to set start offset and max list count for pull phonebook operation 23- PBAP Client: support multiple parallel connections 24- HID Parser: introduce HID Descriptor and HID Descriptor Usage iterators 25- HCI Dump Dispatch: allow to use multiple HCI Dump implementations 26- HCI Dump: support ISO packets in PacketLogger format 27- Immediate Alert Service Server and Client: added 28- Link Loss Service Server and Client: added 29- TX Power Service Client: added 30- btstack_util: safe wrappers for snprintf 31- Battery Service v1.1 Server 32 33### Fixed 34- L2CAP: Fix ERTM Tx buffer reconfiguration 35- RFCOMM: shut down multiplexer after closing last channel instead of multiplexer idle timer 36- RFCOMM: fix multiple outgoing channel setup 37- SDP Server: skip empty attribute lists in Service Search Attribute Response 38- HID Host: return complete HID report 39- SM: fix CTKD key distribution over BR/EDR 40- SM: fix CTKD after BR/EDR Role Change 41- A2DP: emit stream established if peer set-up configuration 42- AVDTP: fix SDP Client registration bug that could block other SDP queries 43- HIOS Client: emit disconnected event on HCI disconnect and free connection struct 44- Scan Parameter Service Client: emit disconnected event on HCI disconnect and free connection struct 45- PBAP Client: fix PBAP_SUBEVENT_OPERATION_COMPLETED with OBEX_DISCONNECTED for pbap_disconnect 46- HFP HF: send HF Indicator update only if enabled by AG 47- HID Host: omit Report ID in Set/Get Report and send report for report id == HID_REPORT_ID_UNDEFINED 48- POSIX: clear run loop exit flag 49- btstack_util: skip whitespace in btstack_atoi 50- esp32: use synchronous VHCI API with newer ESP32 variants (esp32, -c3, and -s3 use asynchronous API) 51 52### Changed 53- GAP: return command disallowed if disconnect already requested 54- GAP: improve handling of incorrectly resolved addresses in HCI_SUBEVENT_LE_CONNECTION_COMPLETE 55- GAP: only store link key if at least one side requests bonding during the IO Capabilities exchange. 56- GATT Client: use Find by Information Request to lookup CCCD for Notifications/Indications 57- SDP Client: trigger next SDP query callback, if registered callback does not start SDP query 58- BNEP Client: provide setup connection response in BNEP_EVENT_CHANNEL_OPENED 59- GOEP Client: remove goep_client_create_connection. Use goep_client_connect instead. 60- HID Parser: cleanup of function names and signatures 61- HIDS Client: use error code instead of ATT status in connected event 62- Device Information Service Server: update for v1.2 63- Device Information Service Client: update for v1.2 64 65## Release v1.6.1 66 67### Added 68- GAP: support coordinated private random address updates 69- libusb: support send/receive of HCI ISO packets 70 71### Fixed 72- GAP: allow use of own address type different from gap_random_set_mode() incl. RPA in LE Extended Advertising 73- GAP: emit GAP_SUBEVENT_LE_CONNECTION_COMPLETE for failed outgoing connections 74- HCI: improved BIG setup/termination 75- L2CAP: set extended flow control bit in information response if enabled 76- SM: abort pairing with invalid parameter error for encryption key size > 16 77- SM: ignore Security Request after re-encryption has started 78- SM: respond to Pairing Request after Identity Resolution failed 79- SM: fix CTKD from Classic in Peripheral role 80- ATT Server: support delayed read responses for registered services 81- ATT Server: allow to start crypto operation from delayed att read/write request 82- HFP: use round robin for outgoing connections 83- HFP HF: send HF Indicator update only if enabled by AG 84- HFP AG: send OK after SLC for HF that does not support 3-way-calling or HF Indicators 85- HSP HS: use EV3 and 2EV3 packets for 7.5 ms voice interval 86- AVDTP: use round robin for outgoing connections 87- AVDTP: allow call to avdtp_disconnect before connection was established 88- A2DP: allow call to avdtp_disconnect before connection was established 89- AVRCP: use round robin for outgoing connections 90- GOEP Client: use round robin for outgoing connections 91- HID Host: use round robin for outgoing connections 92- HOG Host: emit GATTSERVICE_SUBEVENT_HID_REPORT for hids_client_send_write_report 93 94### Changed 95- HCI: hci_reserved_packet_buffer and higher layer functions asserts if packet buffer is free instead of return value 96- GAP: suppress GAP_SUBEVENT_LE_CONNECTION_COMPLETE for intermediate connection pause due to filterlist update 97- GAP: mutual authentication for legacy secure connections to prevent BIAS attacks was made optional with 98 ENABLE_MUTUAL_AUTHENTICATION_FOR_LEGACY_SECURE_CONNECTIONS. Not needed for default encryption key size of 16 99- HCI Dump: only log internal/BTstack events for ENABLE_LOG_BTSTACK_EVENTS 100 101## Release v1.6 102 103### Added 104- HCI: allow to configure Classic ACL packet types with hci_enable_acl_packet_types 105- GAP: emit generic GAP_SUBEVENT_LE_CONNECTION_COMPLETE for any LE Connection Complete 106- SM: support LE Secure Connection debug keys for testing 107- L2CAP: additional authorization_required param in l2cap_ecbm_register_service 108- GATT Client: support GATT over Enhanced LE Bearer 109- GATT Server: support GATT over Enhanced LE Bearer 110- A2DP: support SDP record without service name and/or provider 111- AVRCP: support SDP record without service name and/or provider 112- HFP: hfp_hf_create_sdp_record_with_codecs and hfp_hf_create_sdp_record_with_codecs 113- HFP: support for LC3-SWB 114- HFP: support SDP record without service name 115- PABP Server: support SDP record without service name 116- SPP Server: support SDP record without service name 117- HOG Device: emit HIDS_SUBEVENT_SET_REPORT 118- HOG Device: provide report for GET REPORT operation via callback 119- SBC Codec: new interface allows for multiple instances 120- LE Device DB: le_device_db_dump dumps LTK 121- Port for Zephyr 3.x 122- Port for FreeBSD that uses kernel netgraph HCI node 123 124### Fixed 125- HCI: fix remove le device from whitelist and periodic advertiser list 126- HCI: fix restart connect with whitelist after whitelist modification 127- GAP: store classic link keys independent from peer bonding request 128- SM: directly detect invalid Public key when Controller ECC is used 129- SM: sm: only set LinkKey flag in Pairing Request/Response if BR/EDR supported locally 130- L2CAP: make l2cap_get_remote_mtu_for_local_cid available to LE-only builds 131- L2CAP: handle all signaling requests and responses in closed state 132- HFP: use 'don't care' to accept SCO connections, fixes issue on ESP32 133- HFP: fix LC3-WB init 134- HFP AG: fix setup of audio connection in service level established event 135- HFP AG: fix BCM WBS setup 136- HFP AG: allow use of mSBC in subsequent audio connections after CSVD downgrade 137- HFP AG: fix terminate held call 138- HFP HF: send 'deactivate EC/NR' if supported in AG 139- HID Device: set Report Mode as default 140- HID Host: support large HID Descriptors 141- AVDTP: limit L2CAP MTU to largest BR/EDR packet, fixes A2DP Sink role for some Samsung TV 142- AVDTP: fix Get Stream Configuration 143- AVDTP: reject suspend in state endpoint open 144- AVDTP: return error in avdtp_suspend_stream if state is not streaming 145- AVRCP: reject incoming second l2cap connection 146- AVRCP: generate command for avrcp_controller_get_element_attributes dynamically 147- SPP Server: fix SPP version in SDP record 148- GATT Client: ignore notifications/indications until re-encrypted for bonded device without ENABLE_LE_PROACTIVE_AUTHENTICATION 149- btstack_flash_bank: support alignment larger than 4 150- windows: fix timestamps in packet logs 151 152### Changed 153- HCI: simplified implicit SCO flow control 154- HCI: return ERROR_CODE_COMMAND_DISALLOWED for outgoing connections in gap_connect 155- GAP: only return status code for errors in gap_connect 156- AVRCP: shorten default SDP Service and Provider Names 157- GATT Client: emit query complete event for gatt_client_discover_characteristic_descriptors in next run loop iteration 158- HFP: report HFP Version 1.9 in SDP record 159- HID Parser: ignore Report Items without Usage 160- btstack_crypto: allow MBEDTLS config via MBEDTLS_CONFIG_FILE 161- remove old Zephyr 1.9 port 162- ports: require CMake 3.12 for CMake projects 163 164## Release v1.5.6 165 166### Added 167- HCI: HCI_ACL_CHUNK_SIZE_ALIGNMENT allows to keep HCI transport writes aligned 168- GAP: support additional LE PHYs for scanning and outgoing connections 169- GATT Client: allow to queue requests with gatt_client_request_to_send_gatt_query and gatt_client_request_to_write_without_response 170- GATT Client: support GATT over BR/EDR transport via gatt_client_classic_connect 171- HFP: provide SCO packet types and rx/tx packet lengths in HFP_SUBEVENT_AUDIO_CONNECTION_ESTABLISHED 172- HFP: allow to register custom at commands with hfp_hf_register_custom_at_command 173- HFP: experimental support for LC3-SWB from HFP SWB draft with ENABLE_HFP_SUPER_WIDE_BAND_SPEECH 174- AVRCP: support Cover Art via avrcp_cover_art_client 175- example: gatt_streamer_server and le_streamer_client report DLE and PHY changes 176- NXP: support for NXP Controller with bootloader versions v1, e.g. NXP 88W8997, and v3, e.g. NXP IW416 or IW61x 177- esp32: support esp-idf v5.x audio driver 178- esp32: warn about sdkconfig issues 179- esp32: add BTstack component config options via menuconfig 180- esp32: allow to disable default audio i2s driver via component config 181- esp32: btstack_stdio_init configures buffered output, required for stdin support 182- Port for Renesas RA6M4 with DA14531 183- Port for NXP Controller on POSIX (posix-h4-nxp) 184- Port for newer Infineon Controller on POSIX (posix-h4-bcm) that requires autobaud-mode 185 186### Fixed 187- HCI: fix set extended scan response 188- HCI: fix report of extended advertisements with data len > 31 189- HCI: fix CTKD in Initiator role over BR/EDR SC when using dedicated bonding 190- SM: fix value in SM_EVENT_NUMERIC_COMPARISON_REQUEST 191- SM: ignore Security Request during re-encryption 192- GATT Client: return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER for invalid connection handle 193- A2DP: emit A2DP_SUBEVENT_STREAM_ESTABLISHED with if connection fails, e.g. because of Page Timeout 194- A2DP Source: a2dp_source_stream_send_media_payload was removed, use a2dp_source_stream_send_media_payload_rtp instead 195- A2DP: use samples as timestamp, fixes issue with Apple Airpods Pro 2nd Gen 196- AVDTP Source: avdtp_source_stream_send_media_payload was removed, use avdtp_source_stream_send_media_payload_rtp instead 197- AVRCP: re-register for notification 198- BNEP: validate UUID32 and UUID128 service in connect request 199- HFP: fix setup/accept of synchronous connection 200- HFP: use mandatory safe settings considering BR/EDR Secure Connections to accept synchronous connections 201- HFP: avoid SCO packet types not supported either locally or remotely 202- HFP: remove trailing newline/carriage return in custom command event 203- PBAP Client: make pbap_set_property_selector work for Pull Phonebook 204- btstack_stdin_embedded: use timer to poll RTT input, fix for tickless RTOS 205- esp32: fix audio power amplifier control on Lyra T v4.3 board 206- tool/convert_gatt_service: removed as GATT Service descriptions not available on Bluetooth SIG web site 207 208### Changed 209- GAP: add gap_set_peer_privacy_mode with default LE_PRIVACY_MODE_DEVICE 210- GAP: use stack defaults for LE Connection Parameter Updates 211- GAP: set minimum and maximum CE length to 0 212- GAP: ENABLE_EXPLICIT_DEDICATED_BONDING_DISCONNECT disables disconnect after dedicated bonding 213- GOEP Client: support multiple instances 214- A2DP Sink: drop unused local seid argument in a2dp_sink_establish_stream 215- HFP: emit HFP_SUBEVENT_CUSTOM_AT_MESSAGE_SENT after sending custom command / unsolicited response code 216- sco_demo_util: replace hfp_msbc by hfp_codec 217- BCM: look for PatchRAM file with prefix DEVICE_NAME and extension '.hcd' 218- bluetooth: indicated identity address in resolved address type enums name 219- btstack_audio: added get_samplerate function to help with audio sample rate synchronization 220- btstack_flash_bank: write empty tag instead of overwriting existing tag with ENABLE_TLV_FLASH_WRITE_ONCE 221- esp32: drop support for Makefile projects from esp-idf 3.x 222- esp32: avoid deprecated btstack_run_loop_freertos API calls 223- esp32: use sample rate compensation in a2dp_sink_demo 224- stm32-f4discovery-cc256x: use external oscillator for better I2S clock 225- stm32-f4discovery: use sample rate compensation in a2dp_sink_demo 226 227 228## Release v1.5.5 229 230### Added 231- hci_dump_stdout: allow to truncate ACL, SCO and ISO packets with HCI_DUMP_STDOUT_MAX_SIZE_* 232- GATT Service: Broadcast Audio Scan Service Server and Client (BASS 1.0) 233- example/a2dp_source_demo: add command to scan and connect to Bluetooth speaker by class of device 234- OPP Server profile and OPP Server demo 235 236### Fixed 237- GAP: reload LE Resolving List after power-cycle 238- GAP: fix setting of LE Scan Response for data that needs to be fragmented 239- SM: fix pairing process with active ATT communication 240- ESP32: fix init for BR/EDR Only mode 241- ESP32: fix audio driver for sink + source mode 242- ESP32: fixes for ESP-IDF v5.x 243- ESP32: fix compile of non-BTstack examples after adding components/btstack 244 245### Changed 246- GAP: reload LE Filterlist and Periodic Advertiser List after power-cycle 247- SM: delete bonding information for existing device with BD_ADDR on new pairing with different IRK 248- Mesh: move GATT Services into src/mesh/gatt-service 249- LE Audio: move GATT Services into src/le-audio/gatt-service 250- libusb: improve implementation 251 252## Known Issues 253- ESP32: audio driver for ES8388/LyraT v4.3 not updated for esp-idf 5.x 254 255 256## Release v1.5.4 257 258### Added 259- HFP HF: send custom AT command with hfp_hf_send_at_command 260- HFP HF: terminate held calls with hfp_hf_terminate_held_calls 261- HFP HF: provide Call Waiting information alpha field 262- HFP HF: add hfp_hf_set_default_microphone_gain and hfp_hf_set_set_default_speaker_gain for SLC 263- HFP AG: support handling of custom AT commands with hfp_ag_register_custom_at_command 264- HFP AG: send custom unsolicited result code with hfp_ag_send_unsolicited_result_code 265- GAP: allow to enable duplicate filter for LE scanning with gap_set_scan_duplicate_filter 266- GAP: support BIG with gap_big_create and gap_big_terminate 267- GAP: support BIG Sync gap_big_sync_create and gap_big_sync_terminate 268- GAP: support Periodic Advertisement Sync Transfer 269- PBAP Server profile and PBAP Server demo 270- OPP Client profile and OPP Client demo 271- port: CMake build files in all windows-* ports allow to use Visual Studio 2022 272- embedded audio: mono audio is played on both channels if HAVE_HAL_AUDIO_SINK_STEREO_ONLY is defined 273- Support for ESP32-C3 and ESP32-S3 274 275### Fixed 276- HCI: only add paired LE devices with IRK to resolving list 277- HCI: send HCI LE Create Connection Cancel only once for outgoing LE connections without whitelist 278- GAP: use static random address after power up 279- L2CAP: fix L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 280- SM: avoid potential loop during CTKD 281 282### Changed 283- HCI Dump: provide log level to log_message implementation 284- GAP: replace BTSTACK_EVENT_DISCOVERABLE_ENABLED with BTSTACK_EVENT_SCAN_MODE_CHANGED 285 286 287## Release v1.5.3 288 289### Added 290- GAP: support periodic advertising with ENABLE_LE_PERIODIC_ADVERTISING 291- GAP: support periodic inquiry mode with gap_inquiry_periodic_start 292- HFP HF: provide Calling Line Identification alpha field 293- HFP HF: emit HFP_SUBEVENT_TRANSMIT_DTMF_CODES after sending DTMF command 294- GOEP Server 295- Chipset: support for firmware download and configuration of Realtek Controllers 296- PBAP Server and pbap_server_demo 297 298### Fixed 299- GAP: fix gap_connect_cancel for gap_connect_with_whitelist 300- GAP: fix race condition that causes duplicate authenticate request 301- SM: address update for non-resolvable private addresses 302- SM: reset state on power off transition 303- L2CAP: Fix accept incoming ERTM connection when Information Request already complete 304- A2DP Sink: fix config API for AAC, ATRAC, and other codecs 305- HFP: try next link setting for SCO connection failure after SCO reject errors 306- HFP AG: activate all AG indicators upon service level connection establishment 307- HFP AG: handle call termination in alerting call state 308- HFP HF: fix parsing of phone number for voice tag 309- HFP HF: report HFP_SUBEVENT_NETWORK_OPERATOR_CHANGED event 310 311### Changed 312- HCI: use ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS to rejected classic connections 313- SM: pairing events indicate if LE Secure Connection will be used 314- A2DP: new a2dp.c contains shared code of Sink and Source roles 315- A2DP Sink: automatically configure stream endpoint for outgoing connections 316- HFP AG: drop unused number parameter from hfp_ag_outgoing_call_initiated 317- libusb: command line options to delete TLV and specify log file path 318- Windows: native implementations of btstack_tlv_window, hci_dump_windows_fs, hci_dump_window_stdout 319 320## Release v1.5.2 321 322### Added 323- GAP: ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS serializes Inquiry, Remote Name Request and Create Connection operations 324- GAP: support extended advertising with ENABLE_LE_EXTENDED_ADVERTISING 325- GAP: gap_enable_link_watchdog() uses automatic flush timeout to disconnect if data cannot be sent 326- GAP: gap_secure_connections_active() to query if BR/EDR Secure Connecions are possible 327- ATT DB: provide gatt_server_get_handle_range_for_service_with_uuid16 to find included service within handle range 328- GATT Service: Audio Input Control Service Server (AICS 1.0) 329- GATT Service: Microphone Control Service Server (MCS 1.0) 330- GATT Service: Published Audio Capabilities Service Server (PACS 1.0) 331- GATT Service: Volume Control Service Server (VCS 1.0) 332- GATT Service: Volume Offset Control Service Server (VOCS 1.0) 333 334### Fixed 335- POSIX: fix RTS/CTS configuration by keeping local termios copy in btstack_uart_posix 336- HCI: fix handling of HCI Connection Complete with error (regression introduced in v1.5.1) 337- GAP: disable scanning, advertising, connection before updating random address 338- GAP: fix LE Scan with whitelist 339- HFP_AG: fix tracking for call dropped during outgoing ringing 340- HFP: Free HFP Connection object on SDP error / Service not found 341- PBAP Client: emit operation complete with status OBEX_ABORTED 342 343### Changed 344- Chipset: use da145xx in folder/file/function names for Dialog Semiconductor SoCs 345- GAP: set min encryption key size during init, if supported 346- AVDTP: use BLUETOOTH_SERVICE_CLASS_AUDIO_SINK / SOURCE instead of BLUETOOTH_PROTOCOL_AVDTP in SDP queries 347- ATT Server: use uint8_t for status returns 348- libusb, POSIX and Windows ports: use '-' instead of ':' in btstack_BD_ADDR.tlv filename 349 350 351## Release v1.5.1 352 353### Added 354- GOEP Client: add goep_client_version_20_or_higher 355- ESP32: implement audio source 356 357### Fixed 358- PBAP Client: support disconnect while operation is ongoing 359- PBAP Client: use SRM only if GOEP v2.0 or higher connection 360- PBAP Client: emit vCard entry data as PBAP_DATA_PACKET 361- L2CAP: limit remote MTU by local tx configuration in ERTM 362 363### Changed 364- Example: init SM if LE supported to avoid issue with Android Cross-Transport Key-Derivation 365- ESP32: update sdkconfig for esp-idf v4.3, disable Bluedroid host stack 366- ESP32: use I2S configuration from ESP32 LyraT V4.3 367 368 369## Release v1.5.0 370 371### Added 372- HCI Dump: Support BTSnoop format in hci_dump_posix_fs.c for format = HCI_DUMP_BTSNOOP 373- HCI Dump RTT STDOUT: drop messages if RTT buffer is full and RTT is configured for non-blocking 374- HCI: hci_remove_event_handler to remove packet handler 375- hci_cmd: support variable length fields and arrayed parameters 376- GAP: ENABLE_EXPLICIT_LINK_KEY_REPLY allows for asynchronous link key lookup by application 377- GAP: gap_set_page_timeout to set Page Timeout 378- GAP: gap_inquiry_set_scan_activity to set Inquiry Scan Activity 379- L2CAP: emit L2CAP_EVENT_INFORMATION_RESPONSE event with extended features and fixed channels supported 380- L2CAP: support Enhanced Credit-based Flow-Control Mode for connection-oriented channels over BR/EDR/LE 381- A2DP: allow to register media codec validator for sink and source with: 382 - `a2dp_sink_register_media_config_validator` 383 - `a2dp_source_register_media_config_validator` 384- 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 385- OBEX: new obex_parser for chunked OBEX data 386- SM: Support Cross-Transport Key-Derivation (CTKD) of LE LTK from BR/EDR SC Link Key in Responder role 387- SM: sm_remove_event_handler to remove packet handler 388- GATT Service: Bond Management Service (BMS 1.0) Server 389- GATT Service: Microphone Control Service (MICS 1.0) Server 390- GATT Service: TX Power Service (TPS 1.0) Server 391- POSIX: btstack_signal allows to register for callback on signal, e.g. ctrl-c 392- Windows: btstack_stdin_window_register_ctrl_c_callback allows to register for ctrl-c 393 394### Fixed 395- A2DP Source: fix reconfigure 396- AVRCP Controller: prevent registering of notifications for unsupported events 397- RFCOMM: fixed handling of remote port configuration command 398- HFP AG: fix accept incoming connection while audio connection is established 399- PBAP Client: handle chunked vCard Listing 400- PBAP Client: use new streaming obex_parser to handle chunked OBEX data 401- SM: Work around for unexpected Windows 10 disconnect for BR Secure Connections (SMP over BR timeout) 402- SM: support storing bonding information for devices with identical IRK but different public addresses 403- GAP: restart advertising when private address changes 404- le_device_db_tlv: keep number of devices reported by le_device_db_count if old entry is replaced 405 406### Changed 407- Drop iOS support 408- HCI: provide status instead of undocumented int error code and bool for API functions 409- HCI: use 1000 ms watchdog to force power off for hci_power_control(HCI_POWER_OFF) 410- GAP: local name, EIR data, class of device and default link policy can be updated at any time 411- L2CAP: provide status instead of undocumented int error code and bool for API functions 412- L2CAP: remote features not required for SDP connections 413- L2CAP: replaced l2cap_register_packet_handler with l2cap_add_event_handler to register multiple handlers 414- L2CAP: drop reason parameter in l2cap_disconnect 415- L2CAP: use official terminology for L2CAP channel modes - ENABLE_L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE replaces ENABLE_LE_DATA_CHANNELS 416- L2CAP: unify API for can send now, request to send, and send packet and disconnect channel 417- L2CAP: unify events for can send now, packet sent, channel closed (CbM/ECBM using existing events) 418- RFCOMM: `RFCOMM_EVENT_PORT_CONFIGURATION` contains rfcomm_cid and remote flag, emitted for query config 419- RFCOMM: provide status instead of undocumented int error code and bool for API functions 420- RFCOMM: remote port configuration, line status, and modem status are sent by channel state machine 421- HSP: add ACL Connection to all events and BD ADDR to HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE 422- HFP: API functions return status code if appropriate 423- HFP: removed one parameter from hfp_ag/hf_activate_voice_recognition function, introduce hfp_ag/hf_deactivate_voice_recognition instead 424- HFP: merged legacy and enhanced Voice Recognition Activation (VRA) API. If available enhanced mode will be preferred. 425- 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. 426- 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. 427- AVDTP: media config validator is called with preview of media codec configuration event and configured separately for sink/source 428- AVRCP: use PANEL as default unit + subunit info 429- AVRCP Controller: automatically query supported events when registering for notifications 430- AVRCP Target: cache companies and events in library and remove need to answer query in application callback. Use Bluetooth SIG as default company. 431- Run Loop: new functionality for HCI transport drivers and inter-process communication: 432 - *btstack_run_loop_poll_data_sources_from_irq*: used to transfer control from IRQ handler to main thread/run loop 433 - *btstack_run_loop_execute_on_main_thread*: schedule code execution on main thread from other thread 434 - *btstack_run_loop_trigger_exit*: trigger run loop exit 435- POSIX / Windows / Raspi / Qt: use updated ctrl-c handling 436- POSIX TLV: use max value size of 2048, assert in store function if value size is larger 437 438 439## Release v1.4.1 440 441### Added 442- GAP: emit GAP_EVENT_PAIRING_STARTED and GAP_EVENT_PAIRING_COMPLETE 443 444### Fixed 445- GAP: store link key in hci connection struct to allow authenticate after pairing without bonding 446- GAP: avoid requesting authentication twice 447- GAP: cache own address on start advertising and connecting, provide getters 448- GAP: stop LE connecting if create connection fails (e.g. connectable adv active and multiple roles not supported) 449- SM: fix race condition between local address changes and pairing procedure 450- ATT DB: fix spelling `gatt_server_get_handle_range_for_service_with_uuid128`, `gatt_server_get_handle_range_for_service_with_uuid16` 451 452### Changed 453- HCI: update advertising data without stopping advertising first 454- GAP: Drop local bonding flag in IO Capability Reply if remote does not indicate bonding 455- GAP: return status for `gap_set_security_mode` 456- GAP: abort legacy pairing if Level 4 is required 457- GAP: abort SSP on IO Capabilities Request event if Level 4 is required but SC not supported by remote 458- GAP: abort SSP on User Confirmation Request event if Level 3 is required but MITM protection not possible 459- GAP: validate minimal service security level can be reached during pairing in responder role 460- L2CAP: don't trigger hci disconnect if l2cap security requirements are insufficient 461- CVE-2020-26555: reject connections to and from devices with same BD ADDR 462- CVE-2020-26555: ignore NULL link key 463- CVE-2020-26558: abort LE Secure Connection pairing if remote uses the same public key 464 465## Release v1.4 466 467### Added 468- HCI: `btstack_transport_sco.h` supports SCO over physical PCM/I2S interface (`HAVE_SCO_TRANSPORT`) 469- POSIX: `btstack_transport_sco_i2s_test_bridge.c` implements SCO transport interface for UART-to-I2S test bridge 470- btstack_uart: `btstack_uart_t` interface extends `btstack_uart_block_t`: 471 - support sending and receiving SLIP frames for HCI H5 472 - support odd parity 473 - `hci_transport_h4` and chipset drivers have new functions to provide `btstack_uart_t` 474- btstack_uart_slip_wrapper: wrapper that implements SLIP functionality for existing `btstack_uart_block` drivers. 475- hci_transport: add parity field and pass on to `btstack_uart_t` in h4 and h5 476- GATT Client: Battery Service Client 477- GATT Client: Device Information Service Client 478- GATT Client: HID-over-GATT (HOG) Client, Report and Boot Host 479- GATT Client: Scan Parameters Service Client 480- GATT Server: Scan Parameters Service Server 481- GAP: support scan page configuration with `gap_set_page_scan_activity` and `gap_set_page_scan_type` 482- GAP: support sniff subrating with `gap_sniff_subrating_configure` 483- GAP: support QoS setup with `gap_qos_set` 484- AVRCP: new field `button_pressed` in `AVRCP_SUBEVENT_OPERATION` 485- AVRCP: `AVRCP_SUBEVENT_OPERATION` emitted for button release 486- AVRCP Controller: `avrcp_controller_start_press_and_hold_cmd` supports arbitrary device buttons 487- AVRCP Controller: reassemble fragmented AVCTP packets 488- AVDTP: `avdtp_register_media_config_validator` allows to validate media codec configuration 489- A2DP Source: `ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG` disables auto config. requires call to `a2dp_source_set_config_{CODEC}` 490 491### Fixed 492- GAP: calculate IO Cap AuthReq Bondable Mode based on `gap_ssp_set_authentication_requirement` and `gap_set_bondable_mode` 493- GAP: only store link key for SSP if remote side has set bondable in io cap auth requirements 494- GAP: allow to disable link supervision timeout 495- GAP: fix `gap_connect` after `gap_connect_cancel` 496- GAP: re-configure advertisements after power cycle 497- HCI: handle start inquiry failure 498- L2CAP: fix create outgoing connection triggered from packet handler on hci disconnect event 499- L2CAP: return unknown mandatory option in config response 500- AVDTP: fix spelling `avdtp_set_preferred_sampling_frequency` 501- AVRCP Target: fix notification changed event 502- HFP: Emit audio connection released on SLC Release, e.g. on remote power off 503- HFP HF: fix audio connection setup if codec negotiation is supported 504- HFP HF: only emit single event for RING and AG Status updates 505- HFP AG: fix audio connection setup for in-band ringtone on incoming connection 506 507### Changed 508- Port Archive: moved ports that are not recommended for new designs to port/archive folder: 509 - MSP430: the ports used the older community GCC version without 20-bit support needed for code size > 64kB 510 - Broadcom/Cypress H5: uploading PatchRAM is only possible in H4 mode. It's better to also use H4 in general 511 - PIC32-Harmony: the port used Harmony v1 while Harmony v3 has been out since a while 512 - iOS: not supported 513- Run Loop Base: functionality used in most platform run loop implementations 514 - code from `btstack_run_loop_base.c` moved into `btstack_run_loop.c` to minimize changes to build systems 515 - `btstack_run_loop_base.c` is a placeholder and can be removed from build 516- HCI Dump: replace monolithic `hci_dump.c` (with many #ifdefs) into dispatcher with platform-specific implementations: 517 - `posix/hci_dump_posix_fs` - writes binary log file 518 - `posix/hci_dump_stdout` - log to console using printf with local system time 519 - `embedded/hci_dump_embedded_stdout` - log to console using printf 520 - `embedded/hci_dump_segger_stdout` - log to RTT console using `SEGGER_printf` 521 - `embedded/hci_dump_segger_binary` - writes binary log over RTT to host 522- HCI: config I2S for BCM Controllers if `ENABLE_SCO_OVER_PCM`, reduce bit clock to 256/512 kHz 523- btstack_uart_posix: supports SLIP frames and replaces `btstack_uart_block_posix` 524- hci_transport_h5: more performant H5 implementation that requires `btstack_uart_t` driver with SLIP support 525- POSIX Ports: use new `btstack_uart_posix` implementation 526- posix-h5/posix-h5-bcm: use even parity for UART 527- HCI Transport: extract convenience function declaration for h4, h5, em9304_spi, and usb into separate hci_transport_{type}.h 528- GAP: provide Device ID from EIR in GAP_EVENT_INQUIRY_RESULT 529- GAP: only store link key if it allows requested security level 530- GAP: abort SSP pairing if MITM protection required but not possible 531- SM: start pairing as Central for already encrypted connection on Slave Security Request 532- GATT Client: Use ATT_READ_REQUEST for first blob of Read Long Characteristic and Read Long Characteristic Descriptor 533- GATT Server: Allow ATT Read Callback to return custom ATT Error Code 534- Nordic SPP Service Server: use `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` and `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` 535 events instead of callback, and `RFCOMM_DATA_PACKET` for received data 536- u-blox SPP Service Server: use `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` and `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` 537 events instead of callback, and `RFCOMM_DATA_PACKET` for received data 538- HID: Move `src/classic/hid.h` into `src` and prefix with `btstack_` to use it with BLE and avoid name clashes 539- HFP: provide acl_handle in events to identify connection 540- HSP AG: emit HSP_SUBEVENT_BUTTON_PRESSED instead of audio connection setup/release 541- Example: use `btstack_event.h` getters instead of direct array access, use enum to compare status codes 542 543 544## Release v1.3.2 545 546### Added 547- GAP: support for Classic Out-of-Band (OOB) pairing via `gap_ssp_remote_oob_data` with `ENABLE_CLASSIC_OOB_PAIRING` 548- GAP: read local OOB data on start and on call to `gap_ssp_generate_oob_data`, provided via `GAP_EVENT_LOCAL_OOB_DATA` 549- HID Host: add profile, update `hid_host_demo.c` example 550 551### Fixed 552- L2CAP: make handling of HCI disconnect more robust 553- AVDTP: emit stream release for active stream if signaling connection is closed first, e.g. caused by HCI disconnect 554- AVRCP: fix issue when Controller and Target send at the same time 555 556### Changed 557- A2DP, AVDTP: use `a2dp_source_set_config_{TYPE}` and `avdtp_config{TYPE}_store` to avoid large number of parameters 558 559 560## Release v1.3 561 562### Added 563- CC256x: with ENABLE_CC256X_ASSISTED_HFP, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 564- BCM: with ENABLE_BCM_PCM_WBS, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 565- SDP Client RFCOMM: add `sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid` 566- HFP: `ENABLE_HFP_AT_MESSAGES` lets HFP emit `HFP_SUBEVENT_AT_MESSAGE_SENT` and `HFP_SUBEVENT_AT_MESSAGE_RECEIVED` 567- A2DP, AVDTP: provide capabilities and configuration events for A2DP codecs: SBC, MPEG Audio, MPEG AAC, ATRAC 568- A2DP + AVDTP Source: allow to send media packet with `avdtp_source_stream_send_media_packet` and `a2dp_source_stream_send_media_packet` 569- A2DP + AVDTP Source: add `avdtp_source_stream_send_media_payload_rtp` and `a2dp_source_stream_send_media_payload_rtp` 570- A2DP Source: emit `A2DP_SUBEVENT_SIGNALING_CAPABILITIES_COMPLETE` 571- A2DP Source: allow to configure endpoints by calling `a2dp_source_set_config_{TYPE}` during SEP discovery with SBC fallback 572 573### Fixed 574- HCI: keep `le connecting request` on connection complete active, fixes gap_auto_connection_stop() + gap_auto_connection_start() 575- L2CAP: fix packet size check for incoming classic basic channels (regression introduced in v1.2.1) 576- HFP AG/HSP AG: avoid connecting to remote service with same role 577- A2DP Source: support multiple Stream Endpoints with different Media Codec types 578- A2DP Source: emit codec configure event with reconfigure flag set on reconfigure 579- GATT Compiler: support multiple instances of the same service 580 581### Changed 582- GAP: provide Link Type parameter to incoming connection filter for `gap_register_classic_connection_filter` 583- HFP/GOEP Client/AVDTP/A2DP: return `SDP_SERVICE_NOT_FOUND` if no suitable SDP record is found 584- AVDTP Source: `avdtp_source_stream_send_media_payload` includes SBC Header and was deprecated 585- AVDTP/A2DP: use `avdtp_channel_mode_t` in `A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION` 586- A2DP: fix events and use `a2dp_cid`, `local_seid,` `remote_seid` field names in A2DP sub-events 587- GATT Client: Skip MTU exchange after MTU exchange on ATT Server 588- Ports: STM32-F103RB Nucleo + CC256x port removed 589- ESP32: enabled HFP Wide-Band Speech, disable classic secure connections in HSP/HFP demos 590 591 592## Release v1.2.1 593 594### Fixed 595- L2CAP: use connection handle for channel lookups 596- L2CAP: forward data only in open state 597 598### Changed 599- L2CAP: check packet size against local mtu for classic basic channels 600 601 602## Release v1.2 603 604### Fixed 605- L2CAP: trigger pairing for outgoing LE Data Channels if security level insufficient 606- SM: fix update of sc flag for re-encrypted connection in peripheral role 607- SM: send security request on re-connect if bonded and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is defined 608- ESP32: fix audio sink driver 609 610### Added 611- GAP: `gap_delete_bonding` removes device from LE Resolving List and from discards LE bonding information 612- GATT Client: delete bonding information if re-encryption fails and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is not defined 613- GATT Client: gatt_client_set_required_security_level() allows to set required minimum security level for all GATT requests 614- SM: emit events for re-encryption started/complete when bonding information is available 615 616### Changed 617- AVRCP Controller: allow to send multiple absolute volume commands without waiting for response. 618- GAP: replaced `ENABLE_LE_CENTRAL_AUTO_ENCRYPION` with `ENABLE_LE_PROACTIVE_AUTHENTICATION` 619 620 621## Changes October 2020 622 623### Fixed 624- AVDTP Initiator: avoid use of remote seid for stream endpoint lookup, fixes issue with two connected devices 625- AVDTP Source: buffer for SBC media codec information got discarded, leading to invalid Set Configuration command in second connection 626- SM: only trigger Cross-Transport Key Derivation (CTKD) when bonding is enabled 627- SM: set LinkKey flag to request CTKD if enabled 628- SM: store CTKD key with Public Identity Address 629- SM: only allow CTKD to overwrite existing link key if derived key has same or higher authentication 630- SM: start SMP Timeout when sending Security Request 631- HFP HF: fix response to AG Codec Selection while waiting for OK of parallel command 632- HCI: fix reject of LE remote connection param request via HCI 633 634### Added 635- GAP: add `gap_get_link_key_for_bd_addr` 636- GAP: add `gap_bonded` to check if bonding information is available for active connection 637- SM: support h7 for CTKD 638 639### Changed 640- SM: Cross-Transport Key Derivation requires `ENABLE_CROSS_TRANSPORT_KEY_DERIVATION` now 641- SM: block connection if encryption fails for bonded devices as Central 642- SM: support pairing as Central after failed re-encryption 643 644 645## Release v1.1 646 647### Fixed 648- AVRCP/AVCTP: report AVRCP 1.6 and AVCTP 1.4 in SDP record 649 650### Added 651 652### Changed 653 654 655## Changes September 2020 656 657### Fixed 658- HFP: fix parsing of ranges e.g. in +CIND responses 659- AVDTP, AVRCP: fix bugs due to transaction id overrun 660- A2DP Source: fix issues with stream configuration by sink 661- hci_dump: fix tv_us calculation for non-posix / embedded systems with binary output 662 663### Added 664- `btstack_ring_buffer`: add `btstack_ring_buffer_reset` to reset it to initial state/empty 665- GAP: Support for address resolution of resolvable private addresses by Controller with `ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION` 666 667### Changed 668- AVDTP, AVRCP, HSP: schedule SDP query, avoids avoids 'command disallowed' if SDP client is busy 669- HSP, HFP: allow to configure usable SCO packet types 670- cc256x: update CC256xC init script to v1.4 671- A2DP Source: use Get All Capabilities if supported by remote get Delay Reporting capability 672 673## Changes August 2020 674 675### Fixed 676- ESP32: fix authentication for incoming Secure Connections 677- AVDTP: Fix forwarding of Delay reports 678- STM32-F4Discovery: fix pan_lwip_http_server by increasing HCI_ACL_PAYLOAD_SIZE 679- tool/create_packet_log: basic support for 16-bit Unicode log files from Windows 680 681### Added 682- `btstack_run_loop_base`: added `btstack_run_loop_base_dump_timer` 683- GAP: request role change for classic connection via `gap_request_role` 684- GAP: LE Whitelist API with `gap_le_whitelist_x` with x = add, remove, clear and new `gap_connect_with_whitelist` 685- SDP Client: add sdp_client_register_query_callback() allows to register query request instead of polling sdp_client_ready() 686- BNEP lwIP: add `bnep_lwip_connect` to establish BNEP connection and manage lwIP network interface 687- New `btstack_linked_queue` utility, a linked list-based queue with first-in-first-out semantics and constant time enqueue/dequeue operations 688- btstack_tlv_posix: add `btstack_tlv_posix_deinit` 689- New `btpclient` for use with [auto-pts project](https://github.com/intel/auto-pts) 690 691### Changed 692- GAP: treat AES-CCM encrypted connection as mutually authenticated (BIAS) 693- GAP: 'gap_auto_connect_x' API deprecated. Please directly manage LE Whitelist with `gap_le_whitelist_*` functions and call `gap_connect_with_whitelist` instead 694- example/hid_host_demo: try to become master for incoming connections 695- btstack_run_loop: use btstack_assert instead of local while(true) 696- att_db_util: allow to reset att_db via `att_db_util_init` 697 698## Changes July 2020 699 700### Fixed 701- AVDTP: fix invalid response for Get Capabilities request if Delay Reporting was supported 702- AVDTP: handle concurrent signaling establishment with reject and retry 703 704### Added 705- example/hid_host_demo: support reconnect from HID device 706- Crypto: support software AES128 for AES-CCM operations 707- AVRCP: introduced AVRCP_FEATURE_MASK_* as alternative to avrcp_controller_supported_feature_t and avrcp_target_supported_feature_t enums 708- btstack_audio: add set_volume() to sink and set_gain() to source interfaces, minimal volume control for portaudio playback 709- 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 710- GAP: Provide gap_get_role to query master/slave role for HCI connection handle 711- GAP: Provide gap_pin_code_response_binary to use binary data as PIN, e.g. for pairing with Nintendo Wii Remote 712 713### Changed 714- GAP: set minimum required encryption key size for Classic connections back from 16 to 7, matching the Core spec 715 716 717## Changes June 2020 718 719### Fixed 720- HFP: Fix parsing of empty fields, e.g. phone number in +CLCC and other AT commands 721- SM: Fix validation of confirm value for secure connection Passkey entry 722- AVRCP: handle concurrent signaling establishment with reject and retry 723 724### Added 725- GAP: Detect Secure Connection -> Legacy Connection Downgrade Attack by remote features and actual encryption type (BIAS) 726- GAP: Mutual authentication: request authentication after Classic connection got encrypted (BIAS) 727- Windows port for Dialog DA14585 connected via serial port 728 729## Changes 730- CVSD PLC: treat zero frames as good and allow to mark data as bad, e.g. if reported by Controller as erroneous 731 732## Changes May 2020 733 734### Fixed 735- hfp_hf, hsp_hs: use eSCO params in accept sco connection only for incoming eSCO connections 736- pbap_client: fix PBAP UUID len on connect message 737- SM: fix secure connection pairing as peripheral when local user confirmation happens after remote one 738- A2DP Source: only connect to remote sink stream endpoints 739- btstack_hal_flash_memory: fix write of 0xff bytes to simulated flash 740- hsp_hs: fix disconnect if audio not connected 741- hsp_ag: fix accept incoming connection 742 743### Added 744- example/le_mitm: MITM implementation that forwards ATT PDUs and allows for pairing 745- GAP: gap_set_security_level sets required security level for incoming and outgoing connections 746- cc256x: allow to specify power vector for each modulation type 747- FreeRTOS: btstack_run_loop_freertos_trigger_exit allows to request run loop exit 748- SM: support LE Secure Connections Only mode with sm_set_secure_connections_only_mode 749- GAP: enable BR/EDR Secure Connections if supported, add gap_secure_connections_enable 750 751### Changed 752- L2CAP ERTM: send extended features request only once per HCI connection 753 754 755## Changes April 2020 756 757### Fixed 758- hog_mouse_demo/hog_keyboard_demo: handle set protocol mode = boot protocol mode 759- HCI: only update BD_ADDR placeholder in shortened and complete name in EIR data, limit device name to 240/248 bytes 760 761### Added 762- GAP: gap_set_allow_role_switch allows to prevent role switch in outgoing classic ACL connections 763- example: hog_boot_host_demo implements an HID-over-GATT Boot Host that supports keyboard and mouse 764- HCI: add ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS that forces fragmentation of ACL-LE packets to fit into over-the-air packet 765 766### Changed 767- Broadcom/Cypress: wait 300 ms after PatchRAM update in hci.c to assert Controller is ready 768- esp32: provide esp-idf/component/btstack/btstack_port_esp32.c and only minimal app_main in template/main/main.c 769- att_db: skip att_read_callback for ATT Read Blob Request if offset == value_len 770 771 772## Changes March 2020 773 774### Fixed 775- GAP: fixed gap_set_scan_parameters() if issued right before gap_start_scan() 776- HCI: only send HCI Read Local Encryption Key Size if supported by Controller 777 778### Added 779- GATT Client: allow to register for any notification/indication and/or any connection 780- HCI: added hci_read_inquiry_scan_activity and hci_write_inquiry_scan_activity commands 781- chipset: assert hci packet buffers are suitable for firmware upload or patches (atwilc3000,bcm,cc256x,intel) 782- btstack_util: added btstack_replace_bd_addr_placeholder 783 784### Changed 785- AVRCP Target: volume in avrcp_target_volume_changed is reported as current value in interim response to register for volume change notifications 786- SDP Client: query attributes 0x0000..0xffff instead of 0x0001..0xffff to match other stacks / improve compatibility with bad sdp server implementations 787 788 789## Changes Februar 2020 790 791### Fixed 792- AVRCP Target: fix reporting of PLAYBACK_STATUS_CHANGED 793- HCI: handle reconnect request for Classic and LE connections triggered by packet handler for Disconnection Complete Event 794 795### Changed 796- hid_host_mode: allow sniff mode 797 798### Added 799- 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 800 801 802## Changes January 2020 803 804### Fixed 805- L2CAP ERTM: avoid read-after-free on decline of incoming connection 806- GATT Client: set uuid16 to zero when deserializing uuid128 services, characteristics, and descriptors 807- att_db_util: fix realloc of att db buffer for large attributes 808- btstack_tlv_posix: only keep last value in memory, fix delete operation 809- l2cap_signaling: use packet boundary flags 0x00 for LE signaling packets (ignoring hci_non_flushable_packet_boundary_flag_supported()) 810 811### Added 812- att_db_util: provide GATT Database Hash via att_db_util_hash_calc 813- GATT Compiler: provide GATT Database Hash via GATT_DATABASE_HASH Characteristic 814- ATT Server: validate request pdu length 815 816### Changed 817- Crypto: update AES-CMAC implementation to access all message bytes sequentially 818 819 820## Changes December 2019 821 822### Fixed 823- example/pan_lwip_http_server: use Network Access Point, CoD 824- sm: emit pairing complete in master role when no keys are distributed / bonding disabled 825 826### Added 827 828### Changed 829- Updated CC256x initscript: CC256xC v1.3 830- ESP32: add CMake project files 831 832 833## Changes November 2019 834 835### Fixed 836- AVDTP Source: return correct `avdtp_cid` and `local_seid` in `AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW` 837- L2CAP: send LE Data Channel SDUs round robin with other data 838- L2CAP ERTM: send ERTM I-frames round robin with other data 839 840### Added 841- ATT Server: return error if request to send now for Notification or Indication already registered 842- Linked List: return if item was added for `btstack_linked_list_add[_tail]` 843- btstack_run_loop_remove: return bool true if timer/data source was removed 844- segger-rtt: allow to configure with `SEGGER_RTT_PACKETLOG_*` directives, update to v6.54 845- GAP: support setting Link Supervision Timetout for outgoing Classic connections using `gap_set_link_supervision_timeout` 846- lwip: add download test files to http server demo 847 848### Changed 849- Linked List: return bool true if item was removed 850 851 852## Changes October 2019 853 854### Fixed 855 856### Added 857- `btstack_bool.h`: provide boolean type 'bool' via `<stdbool.h>` or as backport 858- provide `btstack_assert(condition)` 859- H4 Transport: avoid calling `hci_transport_h4_trigger_next_read` when transport is closed 860 861### Changed 862- libusb and posix ports: store bonding information in TLV 863 864 865## Changes September 2019 866 867### Fixed 868- L2CAP ERTM: assert that packet can be stored in fragment buffers in ertm 869- L2CAP ERTM: reject incoming connection if ERTM is configured as mandatory but not supported by remote 870- GATT Client: allow Write Without Response independent of other requests 871 872### Added 873- GAP: allow to reject GAP classic connection via gap_register_classic_connection_filter 874- GAP: support reading RSSI for Classic+LE using gap_read_rssi. Emits `GAP_EVENT_RSSI_MEASUREMENT` 875 876### Changed 877- Bluetooth and BTstack Error Codes and Events: collect status codes in bluetooth.h and events in btstack_defines.h 878- bluetooth.h: extract internal defintitions to respective protocol layers 879- Updated CC256x initscripts (CC256xB v1.8, CC256xC v1.2, CC256xC v1.2) 880 881 882## Changes August 2019 883 884### Fixed 885- POSIX, WICED, Windows, FreeRTOS run loops: handle time_ms overrun after 49 days 886- RFCOMM: accept incoming L2CAP connection in Basic mode if ERTM is enabled but not requested for this connection 887- RFCOMM: limit RFCOMM MTU by local L2CAP MTU for outgoing connections (only revelvant for ERTM) 888- L2CAP ERTM: stop timers on disconnect 889- L2CAP ERTM: fix sending of segmented SDUs 890- L2CAP ERTM: handle unsupported Information Response 891- SM: generate local nonce for confirm value in JW+NC+PK in Secure Connections Responder role 892 893### Added 894- `btstack_run_loop_base`: portable implementation of timer and data source management as base for platform specific implementations 895 896## Changed 897- FreeRTOS: use xQueueCreateStatic (static variant of xQueueCreate) if available for static memory-only setups 898- L2CAP ERTM: handle invalid Information Response (assume no extended features supported) 899- POSIX: use monotonic clock as timebase if available 900- HCI Transport H4/H5/EM9304 SPI: ignore block read/sent from UART driver when closed 901- HCI: Read Encryption Key Size after encryption was enabled 902- Errata 11838: 903 - GAP: gap_set_required_encryption_key_size allows to set the required key size, default = 16 (max) 904 - GAP: validate encryption key size to emit GAP Security Levels 905 906## Changes July 2019 907 908### Fixed 909- SM: Fixed regression introduced in f3582630 910- L2CAP: avoid reading l2cap signaling command len out of bounds 911- HCI Transport H4/H5/EM9304 SPI: fix payload size checks (also for 8/16-bit platforms) 912 913### Changed 914- SM: Start encryption upon receiving slave securiy request if bonded 915- hci: use 2 as HCI_INCOMING_PRE_BUFFER_SIZE in LE-only configuration for GATT Client 916 917--- 918 919## Changes June 2019 920 921### Changed 922- FreeRTOS: use freertos/.. prefix to include FreeRTOS headers if HAVE_FREERTOS_INCLUDE_PREFIX is defined 923- BNEP: add Connection Handle to BNEP_EVENT_CHANNEL_OPENED 924- Examples: renamed le_counter to gatt_counter and le_streamer to le_streamer_server to indicate support for GATT over BR/EDR 925 926### Fixed 927- BNEP: Bluetooth address is stored in little-endian format for all BNEP_EVENT_* 928- libusb: avoid use-after-free for SCO packets on disconnect 929 930### Added 931- example: pan_lwip_http_server using lwIP as network stack to implement PAN NAP service 932- platform/lwip/bnep_lwip.c: BNEP lwIP adapter that forwards packets between BNEP service and lwIP 933- ENABLE_GATT_OVER_CLASSIC enables support for GATT over BR/EDR in att_server 934 935--- 936 937## Changes May 2019 938 939### Changed 940- ESP32: Configure SCO over HCI after power up 941- btstack_tlv_flash_bank: support targets where a value cannot be overwritten with zero. When ENABLE_TLV_FLASH_EXPLICIT_DELETE_FIELD 942 is defined, an explicit delete field is used to indicate an invalid entry. 943 944### Fixed 945- SM: Avoid potential use-after-free on immediate disconnect (lookup connection via con handle instead of storing pointer) 946 947### Added 948- gatt_client: emit query complete event for signed write operation 949- hci_transport_h4: add workaround for flow control bug in CYW2070x, enable with ENABLE_CYPRESS_BAUDRATE_CHANGE_FLOWCONTROL_BUG_WORKAROUND 950 951--- 952 953## Changes April 2019 954 955### Changed 956- ESP32: use micro-ecc from 3rd-party as esp-idf removed it in their 3.3 release 957 958### Fixed 959- hci: pad LE Scan response with zeroes 960- SM: store local CSRK 961- ATT DB: call write callback for validated signed writes 962- ATT Server: abort signed write validation on incoming new request 963- Bluetooth SIG web scraping tools updated 964- libusb: compiles for FreeBSD 965 966### Added 967 968--- 969 970## Changes March 2019 971 972### Changed 973- use Makefile for stm32-f4discovery-cc256x port 974- le_device_db: add secure_connection argument to le_device_db_encryption_set and le_device_db_encryption_get 975 976### Fixed 977- SM: Use provided authentication requirements in slave security request 978 979### Added 980- port/stm32-f4discovery-cc256x: add support for built-in MEMS microphone 981- SM: Track if connection encryption is based on LE Secure Connection pairing 982- ATT DB: Validate if connection encrypted is based on SC if requested 983- att_db_util: support ATT_SECURITY_AUTHENTICATED_SC permission flag 984- GATT Compiler: support READ_AUTHENTICATED and WRITE_AUTHENTICATED permsission flags 985- ESP32: erase nvs flash is newer nvs version found 986- libusb: add support for nRF52840-PCA10056 running Zephyr hci_usb example 987- port/stm32-l073rz-nucleo-em9304 for Nucleo L073RZ with EM9304 DVK, replaces port/stm32-l053r8-nucleo-em9304 988 989## Changes February 2019 990 991### Changed 992- example/a2dp_sink_demo: use linear resampling to fix sample rate drift 993- btstack_audio: split interface into sink and source 994 995### Fixed 996- Crypto: fix lockup when stack is shutdown while waiting for result of HCI Command, e.g. LE Read Local P256 Public Key 997- SM: Avoid SM_EVENT_PAIRING_COMPLETE with ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION after successful pairing in responder role 998 999### Added 1000- example/a2dp_sink_demo: add target role, support volume control on both devices 1001- example/audio_duplex: playback audio audio source on audio sink (test audio path) 1002- btstack_audio_embedded: implement audio source path 1003 1004--- 1005 1006## Changes January 2019 1007 1008### Changed 1009- L2CAP: provide channel mode (basic/ertm) and fcs option in L2CAP_EVENT_CHANNEL_OPENED 1010- RFCOMM: support L2CAP ERTM. Callbacks passed to rfcomm_enable_l2cap_ertm() are used to manage ERTM buffers 1011 1012### Added 1013- L2CAP: emit L2CAP_EVENT_ERTM_BUFFER_RELEASED if ERTM buffer not needed/used anymore 1014- L2CAP: add fcs_option to ERTM config l2cap_ertm_config_t 1015- HCI: validate advertisement data length field when generating GAP_EVENT_ADVERTISING_REPORT 1016- ad_parser: validate data element length fields in ad_iterator_has_more 1017- Raspberry Pi 3 A+/B+ port in port/raspi, starts without power cycle 1018 1019### Fixed 1020- HCI: release outgoing buffer on disconnect if waiting to send another ACL fragment 1021- POSIX: use correct baudrate enums for baud rates higher than 921600 (Linux) 1022- Crypto: directly process queued crypto operation on HCI result 1023 1024--- 1025 1026## Changes December 2018 1027 1028### Added 1029- SM: generate and store ER / IR keys in TLV, unless manually set by application 1030- hci_dump: support PacketLogger or BlueZ format output via SEGGER RTT Channel 1 Up 1031 1032### Fixed 1033- SM: fix internal buffer overrun during random address generation 1034 1035## Changes November 2018 1036 1037### Added 1038- GAP: gap_le_connection_interval provides connection interval for conn handle 1039- Nordic SPP Service Server: GATT service that emulates a serial port over BLE based on Nordic Semiconductor documentation. 1040- uBlox SPP Service Server: GATT service that emulates a serial port over BLE based on uBlox documentation. 1041- SM: ENABLE_LE_CENTRAL_AUTO_ENCRYPTION triggers automatic encryption on connect to bonded devices 1042- SM: generate and store ER / IR keys in TLV, unless manually set by application 1043 1044### Fixed 1045- SM: prevent random address updates if gap_random_address_set was used 1046- SM: fix internal buffer overrun that can cause storing of bonding information to fail 1047- SM: ignore Slave Security Request after sending own Pairing Request 1048- L2CAP: fix use after free on disconnect if ERTM is enabled 1049- HFP: Handle multiple commands/responses in single RFCOMM packet 1050- Memory Pools: clear all buffers before use 1051 1052--- 1053 1054## Changes October 2018 1055 1056### Added 1057- SDP Server: queue incoming connections when already connected instead of rejecting them 1058- 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. 1059- HIDS Device: GATT service that exposes HID reports intended for HID Devices, like keyboard and mouse. 1060 1061### Fixed 1062- HCI: fix bug in gap_inquiry_stop that triggered additional GAP_EVENT_INQUIRY_COMPLETE instead of stopping the inquiry 1063- L2CAP: fix issue with outgoing connection before read remote supported complete when other channels exist 1064- L2CAP ERTM: allow SDU of szie MPS in first packet that contains L2CAP SDU Length 1065- L2CAP ERTM: fix memory corruption triggered if local_mtu > mps 1066- L2CAP ERTM: fix outgoing fragment management 1067- HFP: decline incoming RFCOMM connection after outgoing connection was started 1068- AVRCP: fix crash on disconnect of connection established by remote 1069 1070--- 1071 1072## Changes September 2018 1073 1074### Fixed 1075- HCI: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 1076- L2CAP: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 1077- L2CAP: Evaluate 'can send now' on HCI Disconnect as ACL buffers in Bluetooth Controller have been used for the closed connection are freed implicitly 1078- L2CAP: Check can send now before sending extended information requeste needed for ERTM mode 1079- L2CAP: Use valid signaling identifier for L2CAP Connection Parameter Update Request 1080- 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 1081- RFCOMM: Avoid use-after-free on channel finalize 1082- GATT Client: stop timer on disconnect - fixes use after free / crash 1083 1084### Added 1085- A2DP Source: Support stream reconfiguration (a2dp_source_reconfigure_stream_sampling_frequency) 1086- 3rd-party: yxml is used for PBAP vCard list parsing 1087- cc256xC: new v1.1 init scripts 1088 1089--- 1090 1091## Changes August 2018 1092 1093### Added 1094- PBAP: added pbap_get_phonebook_size() to get phonebook entry count 1095 1096### Fixed 1097- GATT Server: Allow enable Notifications/Indication with Write Command. Fixes issue with some Android devices. 1098- SM: fix pairing for Secure Connections with Bonding if remote sends additional keys 1099- SM: drop LTK flag from Pairing Response for Secure Connections 1100- L2CAP: fix emitted L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 1101 1102## Changes June 2018 1103 1104### Added 1105- btstack_audio.h: application level API for audio playback and recording 1106- embedded/hal_audio.h: low-level API for audio playback and recording 1107- HID Device: hid_device_connect(..) function 1108- ESP32: implement hal_audio 1109- DA14585: support for Dialog Semiconductor DA14585 LE-only controller 1110- Raspberry Pi 3 + Raspberry Pi Zero W port in port/raspi 1111 1112### Changed 1113- Errata 10734: 1114 - SM: Generate new EC Public Keypair after each pairing 1115 - SM: Abort failure with DHKEY_CHECK_FAILED if received public key is invalid (instead of unspecified error) 1116- btstack.h: only include classic headers if ENABLE_CLASSIC is defined 1117- windows: ignore virtual Bluetooth adapter provided by VMware 1118- Replaced HCI_PACKET_BUFFER_SIZE with HCI_INCOMING_PACKET_BUFFER_SIZE and HCI_OUTGOING_PACKET_BUFFER_SIZE 1119 1120--- 1121 1122## Changes June 2018 1123 1124### Fixed 1125- HFP: Fix Wide Band Speech bit in SDP record for both HF/AG. Missing bit prevents macOS from using mSBC 1126- ATT Server: send ATT_EVENT_HANDLE_VALUE_INDICATION_COMPLETE with status ATT_HANDLE_VALUE_INDICATION_DISCONNECT on disconnect 1127- AVRCP Controller: fix parsing of now playing info 1128 1129### Changed 1130- ATT Server: ATT_HANDLE_VALUE_INDICATION_DISCONNECT is delivered to service handler if registered 1131 1132### Added 1133- ATT Server: packet handler field added to att_service_handler_t to receive: connect/disconnect, atu exchange, indication complete 1134 1135--- 1136 1137## Changes May 2018 1138 1139### Added 1140- GAP: re-encrypt outgoing connection if bonded 1141- ATT Server: wait until re-encryption is complete 1142- GATT Client: wait until re-encryption is complete 1143- ATT Server: added att_server_request_to_send_notification and att_server_request_to_send_indication 1144- GATT Client: if ENABLE_GATT_CLIENT_PAIRING, GATT Client starts pairing and retry operation on security error 1145 1146### Changed 1147- ATT Server: att_server_register_can_send_now_callback is deprecated, use att_server_request_to_send_notification/indication instead 1148 1149### Fixed 1150- SM: Fix LE Secure Connection pairing in Central role 1151- le_device_db_tlv: fix seq nr management 1152- SM: improve le_device_db lookup and storing of IRK 1153- GATT Server: fix lookup for Client Characteristic Configuration in services with multiple Characteristics 1154- RFCOMM: emit channel closed on HCI/L2CAP disconnect after sending DISC while expecting UA 1155 1156--- 1157 1158## Changes April 2018 1159 1160### Added 1161- Crypto: btstack_crypo.h provides cryptographic functions for random data generation, AES128, EEC, CBC-MAC (Mesh) 1162- SM: support pairing using Out-of-Band (OOB) data with LE Secure Connections 1163- Embedded: support btstack_stdin via SEGGER RTT 1164 1165### Changed 1166- att_db_util: added security requirement arguments to characteristic creators 1167- SM: use btstack_crypto for cryptographpic functions 1168- GAP: security level for Classic protocols (asides SDP) raised to 2 (encryption) 1169 1170### Fixed 1171- HFP: fix answer call command 1172- HCI: fix buffer overrun in gap_inquiry_explode 1173- SDP: free service record item on sdp_unregister_service 1174 1175## Changes March 2018 1176 1177### Added 1178- GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections 1179- ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c 1180- ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated 1181 1182### Fixed 1183- RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1) 1184- HSP HS: accept incomming SCO connection 1185- SM: fix iteration over LE Device DB entries for bonding and address resolving 1186- SM: store pairing information only if both devices have requested bonding 1187 1188--- 1189 1190## Changes February 2018 1191 1192### Added 1193- GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE 1194- SM: new event SM_EVENT_PAIRING_COMPLETE 1195- GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done 1196- GAP: add gap_delete_all_link_keys 1197 1198### Changed 1199- GATT Client: round robin for multiple connections 1200- ATT Dispatch: round robin for ATT Server & GATT Client 1201- L2CAP: round robin for all L2CAP channels (fixed and dynamic) 1202- btstack_link_key_db: addition functions for link key iteration 1203- GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up 1204- CSR: set all keys in psram instead of default 1205 1206### Fixed 1207- tc3556x: fix startup after baud rate change 1208 1209--- 1210 1211## Changes January 2018 1212 1213### Added 1214- Port for Windows with Zephyr HCI Firmware connected via serial port 1215- em9304: upload patch containers during HCI bootup 1216- Makefile for STM32-F4Discovery port 1217- support for console out via SEGGER RTT 1218- LE Data Channels example in BTstack and [iOS example on GitHub](https://github.com/bluekitchen/CBL2CAPChannel-Demo) 1219- LE Streamer Client can send as fast as possbile as well 1220- L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu 1221 1222### Changed 1223- HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave) 1224- GAP: gap_set_connection_parameters includes scan interval and window params 1225- GATT Client: GATT_EVENT_MTU indicates max MTU 1226- ATT DB Util: attribute handle is returned for new Services and Characteristics 1227 1228### Fixed 1229- Windows: retry serial port operations if not all bytes have been read/written 1230- HFP: avoid buffer overflows setting up messages 1231- SBC Decoder: improved error handling for invalid SBC audio data 1232- GAP: fix Connection Parameter Response in Central role 1233- ATT DB Util: update pointer to database in case of realloc 1234- GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128 1235- GAP: release HCI Connnection after gap_le_conne 1236- ATT: Exchanged MTU is propagate to ATT Server and GATT Client 1237 1238--- 1239 1240## Changes December 2017 1241 1242### Added 1243- Introduced btstack_network.h network interface abstraction 1244- btstack_network_posix implementation using Linux tun/tap interface 1245- WICED: support for btstack_stdin (HAVE_STDIN) 1246- 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. 1247- TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h) 1248- TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c 1249- LE Device DB TLV: overwrite oldest entry if no free entries available 1250- SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role 1251- Example/hid_host_demo with HID parser and support for basic US keyboard layout 1252- 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 1253- Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304) 1254 1255### Changed 1256- panu_demo: uses btstack_network.h now 1257- WICED: configure printf to replace Linefeed with CRLF 1258- SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations 1259 1260### Fixed 1261- RFCOMM: support connection requests during connection failure 1262- L2CAP: support connection requests during connection failure 1263- L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU) 1264- HCI: avoid double free during halting 1265- SM: fixed reconnect using legacy pairing in slave role 1266 1267 1268