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- AVDTP, A2DP: MPEG AAC capability and configuration events are extended with the drc field 33 34### Fixed 35- L2CAP: Fix ERTM Tx buffer reconfiguration 36- RFCOMM: shut down multiplexer after closing last channel instead of multiplexer idle timer 37- RFCOMM: fix multiple outgoing channel setup 38- SDP Server: skip empty attribute lists in Service Search Attribute Response 39- HID Host: return complete HID report 40- SM: fix CTKD key distribution over BR/EDR 41- SM: fix CTKD after BR/EDR Role Change 42- A2DP: emit stream established if peer set-up configuration 43- AVDTP: fix SDP Client registration bug that could block other SDP queries 44- HIOS Client: emit disconnected event on HCI disconnect and free connection struct 45- Scan Parameter Service Client: emit disconnected event on HCI disconnect and free connection struct 46- PBAP Client: fix PBAP_SUBEVENT_OPERATION_COMPLETED with OBEX_DISCONNECTED for pbap_disconnect 47- HFP HF: send HF Indicator update only if enabled by AG 48- HID Host: omit Report ID in Set/Get Report and send report for report id == HID_REPORT_ID_UNDEFINED 49- POSIX: clear run loop exit flag 50- btstack_util: skip whitespace in btstack_atoi 51- hxcmod-player: update to fix GCC 11 warnings 52- esp32: use synchronous VHCI API with newer ESP32 variants (esp32, -c3, and -s3 use asynchronous API) 53 54### Changed 55- GAP: return command disallowed if disconnect already requested 56- GAP: improve handling of incorrectly resolved addresses in HCI_SUBEVENT_LE_CONNECTION_COMPLETE 57- GAP: only store link key if at least one side requests bonding during the IO Capabilities exchange. 58- GATT Client: use Find by Information Request to lookup CCCD for Notifications/Indications 59- SDP Client: trigger next SDP query callback, if registered callback does not start SDP query 60- BNEP Client: provide setup connection response in BNEP_EVENT_CHANNEL_OPENED 61- GOEP Client: remove goep_client_create_connection. Use goep_client_connect instead. 62- HID Parser: cleanup of function names and signatures 63- HIDS Client: use error code instead of ATT status in connected event 64- Device Information Service Server: update for v1.2 65- Device Information Service Client: update for v1.2 66- esp32: enable audio driver by default on esp32, esp32c3 and esp32c6 67 68## Release v1.6.1 69 70### Added 71- GAP: support coordinated private random address updates 72- libusb: support send/receive of HCI ISO packets 73 74### Fixed 75- GAP: allow use of own address type different from gap_random_set_mode() incl. RPA in LE Extended Advertising 76- GAP: emit GAP_SUBEVENT_LE_CONNECTION_COMPLETE for failed outgoing connections 77- HCI: improved BIG setup/termination 78- L2CAP: set extended flow control bit in information response if enabled 79- SM: abort pairing with invalid parameter error for encryption key size > 16 80- SM: ignore Security Request after re-encryption has started 81- SM: respond to Pairing Request after Identity Resolution failed 82- SM: fix CTKD from Classic in Peripheral role 83- ATT Server: support delayed read responses for registered services 84- ATT Server: allow to start crypto operation from delayed att read/write request 85- HFP: use round robin for outgoing connections 86- HFP HF: send HF Indicator update only if enabled by AG 87- HFP AG: send OK after SLC for HF that does not support 3-way-calling or HF Indicators 88- HSP HS: use EV3 and 2EV3 packets for 7.5 ms voice interval 89- AVDTP: use round robin for outgoing connections 90- AVDTP: allow call to avdtp_disconnect before connection was established 91- A2DP: allow call to avdtp_disconnect before connection was established 92- AVRCP: use round robin for outgoing connections 93- GOEP Client: use round robin for outgoing connections 94- HID Host: use round robin for outgoing connections 95- HOG Host: emit GATTSERVICE_SUBEVENT_HID_REPORT for hids_client_send_write_report 96 97### Changed 98- HCI: hci_reserved_packet_buffer and higher layer functions asserts if packet buffer is free instead of return value 99- GAP: suppress GAP_SUBEVENT_LE_CONNECTION_COMPLETE for intermediate connection pause due to filterlist update 100- GAP: mutual authentication for legacy secure connections to prevent BIAS attacks was made optional with 101 ENABLE_MUTUAL_AUTHENTICATION_FOR_LEGACY_SECURE_CONNECTIONS. Not needed for default encryption key size of 16 102- HCI Dump: only log internal/BTstack events for ENABLE_LOG_BTSTACK_EVENTS 103 104## Release v1.6 105 106### Added 107- HCI: allow to configure Classic ACL packet types with hci_enable_acl_packet_types 108- GAP: emit generic GAP_SUBEVENT_LE_CONNECTION_COMPLETE for any LE Connection Complete 109- SM: support LE Secure Connection debug keys for testing 110- L2CAP: additional authorization_required param in l2cap_ecbm_register_service 111- GATT Client: support GATT over Enhanced LE Bearer 112- GATT Server: support GATT over Enhanced LE Bearer 113- A2DP: support SDP record without service name and/or provider 114- AVRCP: support SDP record without service name and/or provider 115- HFP: hfp_hf_create_sdp_record_with_codecs and hfp_hf_create_sdp_record_with_codecs 116- HFP: support for LC3-SWB 117- HFP: support SDP record without service name 118- PABP Server: support SDP record without service name 119- SPP Server: support SDP record without service name 120- HOG Device: emit HIDS_SUBEVENT_SET_REPORT 121- HOG Device: provide report for GET REPORT operation via callback 122- SBC Codec: new interface allows for multiple instances 123- LE Device DB: le_device_db_dump dumps LTK 124- Port for Zephyr 3.x 125- Port for FreeBSD that uses kernel netgraph HCI node 126 127### Fixed 128- HCI: fix remove le device from whitelist and periodic advertiser list 129- HCI: fix restart connect with whitelist after whitelist modification 130- GAP: store classic link keys independent from peer bonding request 131- SM: directly detect invalid Public key when Controller ECC is used 132- SM: sm: only set LinkKey flag in Pairing Request/Response if BR/EDR supported locally 133- L2CAP: make l2cap_get_remote_mtu_for_local_cid available to LE-only builds 134- L2CAP: handle all signaling requests and responses in closed state 135- HFP: use 'don't care' to accept SCO connections, fixes issue on ESP32 136- HFP: fix LC3-WB init 137- HFP AG: fix setup of audio connection in service level established event 138- HFP AG: fix BCM WBS setup 139- HFP AG: allow use of mSBC in subsequent audio connections after CSVD downgrade 140- HFP AG: fix terminate held call 141- HFP HF: send 'deactivate EC/NR' if supported in AG 142- HID Device: set Report Mode as default 143- HID Host: support large HID Descriptors 144- AVDTP: limit L2CAP MTU to largest BR/EDR packet, fixes A2DP Sink role for some Samsung TV 145- AVDTP: fix Get Stream Configuration 146- AVDTP: reject suspend in state endpoint open 147- AVDTP: return error in avdtp_suspend_stream if state is not streaming 148- AVRCP: reject incoming second l2cap connection 149- AVRCP: generate command for avrcp_controller_get_element_attributes dynamically 150- SPP Server: fix SPP version in SDP record 151- GATT Client: ignore notifications/indications until re-encrypted for bonded device without ENABLE_LE_PROACTIVE_AUTHENTICATION 152- btstack_flash_bank: support alignment larger than 4 153- windows: fix timestamps in packet logs 154 155### Changed 156- HCI: simplified implicit SCO flow control 157- HCI: return ERROR_CODE_COMMAND_DISALLOWED for outgoing connections in gap_connect 158- GAP: only return status code for errors in gap_connect 159- AVRCP: shorten default SDP Service and Provider Names 160- GATT Client: emit query complete event for gatt_client_discover_characteristic_descriptors in next run loop iteration 161- HFP: report HFP Version 1.9 in SDP record 162- HID Parser: ignore Report Items without Usage 163- btstack_crypto: allow MBEDTLS config via MBEDTLS_CONFIG_FILE 164- remove old Zephyr 1.9 port 165- ports: require CMake 3.12 for CMake projects 166 167## Release v1.5.6 168 169### Added 170- HCI: HCI_ACL_CHUNK_SIZE_ALIGNMENT allows to keep HCI transport writes aligned 171- GAP: support additional LE PHYs for scanning and outgoing connections 172- GATT Client: allow to queue requests with gatt_client_request_to_send_gatt_query and gatt_client_request_to_write_without_response 173- GATT Client: support GATT over BR/EDR transport via gatt_client_classic_connect 174- HFP: provide SCO packet types and rx/tx packet lengths in HFP_SUBEVENT_AUDIO_CONNECTION_ESTABLISHED 175- HFP: allow to register custom at commands with hfp_hf_register_custom_at_command 176- HFP: experimental support for LC3-SWB from HFP SWB draft with ENABLE_HFP_SUPER_WIDE_BAND_SPEECH 177- AVRCP: support Cover Art via avrcp_cover_art_client 178- example: gatt_streamer_server and le_streamer_client report DLE and PHY changes 179- NXP: support for NXP Controller with bootloader versions v1, e.g. NXP 88W8997, and v3, e.g. NXP IW416 or IW61x 180- esp32: support esp-idf v5.x audio driver 181- esp32: warn about sdkconfig issues 182- esp32: add BTstack component config options via menuconfig 183- esp32: allow to disable default audio i2s driver via component config 184- esp32: btstack_stdio_init configures buffered output, required for stdin support 185- Port for Renesas RA6M4 with DA14531 186- Port for NXP Controller on POSIX (posix-h4-nxp) 187- Port for newer Infineon Controller on POSIX (posix-h4-bcm) that requires autobaud-mode 188 189### Fixed 190- HCI: fix set extended scan response 191- HCI: fix report of extended advertisements with data len > 31 192- HCI: fix CTKD in Initiator role over BR/EDR SC when using dedicated bonding 193- SM: fix value in SM_EVENT_NUMERIC_COMPARISON_REQUEST 194- SM: ignore Security Request during re-encryption 195- GATT Client: return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER for invalid connection handle 196- A2DP: emit A2DP_SUBEVENT_STREAM_ESTABLISHED with if connection fails, e.g. because of Page Timeout 197- A2DP Source: a2dp_source_stream_send_media_payload was removed, use a2dp_source_stream_send_media_payload_rtp instead 198- A2DP: use samples as timestamp, fixes issue with Apple Airpods Pro 2nd Gen 199- AVDTP Source: avdtp_source_stream_send_media_payload was removed, use avdtp_source_stream_send_media_payload_rtp instead 200- AVRCP: re-register for notification 201- BNEP: validate UUID32 and UUID128 service in connect request 202- HFP: fix setup/accept of synchronous connection 203- HFP: use mandatory safe settings considering BR/EDR Secure Connections to accept synchronous connections 204- HFP: avoid SCO packet types not supported either locally or remotely 205- HFP: remove trailing newline/carriage return in custom command event 206- PBAP Client: make pbap_set_property_selector work for Pull Phonebook 207- btstack_stdin_embedded: use timer to poll RTT input, fix for tickless RTOS 208- esp32: fix audio power amplifier control on Lyra T v4.3 board 209- tool/convert_gatt_service: removed as GATT Service descriptions not available on Bluetooth SIG web site 210 211### Changed 212- GAP: add gap_set_peer_privacy_mode with default LE_PRIVACY_MODE_DEVICE 213- GAP: use stack defaults for LE Connection Parameter Updates 214- GAP: set minimum and maximum CE length to 0 215- GAP: ENABLE_EXPLICIT_DEDICATED_BONDING_DISCONNECT disables disconnect after dedicated bonding 216- GOEP Client: support multiple instances 217- A2DP Sink: drop unused local seid argument in a2dp_sink_establish_stream 218- HFP: emit HFP_SUBEVENT_CUSTOM_AT_MESSAGE_SENT after sending custom command / unsolicited response code 219- sco_demo_util: replace hfp_msbc by hfp_codec 220- BCM: look for PatchRAM file with prefix DEVICE_NAME and extension '.hcd' 221- bluetooth: indicated identity address in resolved address type enums name 222- btstack_audio: added get_samplerate function to help with audio sample rate synchronization 223- btstack_flash_bank: write empty tag instead of overwriting existing tag with ENABLE_TLV_FLASH_WRITE_ONCE 224- esp32: drop support for Makefile projects from esp-idf 3.x 225- esp32: avoid deprecated btstack_run_loop_freertos API calls 226- esp32: use sample rate compensation in a2dp_sink_demo 227- stm32-f4discovery-cc256x: use external oscillator for better I2S clock 228- stm32-f4discovery: use sample rate compensation in a2dp_sink_demo 229 230 231## Release v1.5.5 232 233### Added 234- hci_dump_stdout: allow to truncate ACL, SCO and ISO packets with HCI_DUMP_STDOUT_MAX_SIZE_* 235- GATT Service: Broadcast Audio Scan Service Server and Client (BASS 1.0) 236- example/a2dp_source_demo: add command to scan and connect to Bluetooth speaker by class of device 237- OPP Server profile and OPP Server demo 238 239### Fixed 240- GAP: reload LE Resolving List after power-cycle 241- GAP: fix setting of LE Scan Response for data that needs to be fragmented 242- SM: fix pairing process with active ATT communication 243- ESP32: fix init for BR/EDR Only mode 244- ESP32: fix audio driver for sink + source mode 245- ESP32: fixes for ESP-IDF v5.x 246- ESP32: fix compile of non-BTstack examples after adding components/btstack 247 248### Changed 249- GAP: reload LE Filterlist and Periodic Advertiser List after power-cycle 250- SM: delete bonding information for existing device with BD_ADDR on new pairing with different IRK 251- Mesh: move GATT Services into src/mesh/gatt-service 252- LE Audio: move GATT Services into src/le-audio/gatt-service 253- libusb: improve implementation 254 255## Known Issues 256- ESP32: audio driver for ES8388/LyraT v4.3 not updated for esp-idf 5.x 257 258 259## Release v1.5.4 260 261### Added 262- HFP HF: send custom AT command with hfp_hf_send_at_command 263- HFP HF: terminate held calls with hfp_hf_terminate_held_calls 264- HFP HF: provide Call Waiting information alpha field 265- HFP HF: add hfp_hf_set_default_microphone_gain and hfp_hf_set_set_default_speaker_gain for SLC 266- HFP AG: support handling of custom AT commands with hfp_ag_register_custom_at_command 267- HFP AG: send custom unsolicited result code with hfp_ag_send_unsolicited_result_code 268- GAP: allow to enable duplicate filter for LE scanning with gap_set_scan_duplicate_filter 269- GAP: support BIG with gap_big_create and gap_big_terminate 270- GAP: support BIG Sync gap_big_sync_create and gap_big_sync_terminate 271- GAP: support Periodic Advertisement Sync Transfer 272- PBAP Server profile and PBAP Server demo 273- OPP Client profile and OPP Client demo 274- port: CMake build files in all windows-* ports allow to use Visual Studio 2022 275- embedded audio: mono audio is played on both channels if HAVE_HAL_AUDIO_SINK_STEREO_ONLY is defined 276- Support for ESP32-C3 and ESP32-S3 277 278### Fixed 279- HCI: only add paired LE devices with IRK to resolving list 280- HCI: send HCI LE Create Connection Cancel only once for outgoing LE connections without whitelist 281- GAP: use static random address after power up 282- L2CAP: fix L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 283- SM: avoid potential loop during CTKD 284 285### Changed 286- HCI Dump: provide log level to log_message implementation 287- GAP: replace BTSTACK_EVENT_DISCOVERABLE_ENABLED with BTSTACK_EVENT_SCAN_MODE_CHANGED 288 289 290## Release v1.5.3 291 292### Added 293- GAP: support periodic advertising with ENABLE_LE_PERIODIC_ADVERTISING 294- GAP: support periodic inquiry mode with gap_inquiry_periodic_start 295- HFP HF: provide Calling Line Identification alpha field 296- HFP HF: emit HFP_SUBEVENT_TRANSMIT_DTMF_CODES after sending DTMF command 297- GOEP Server 298- Chipset: support for firmware download and configuration of Realtek Controllers 299- PBAP Server and pbap_server_demo 300 301### Fixed 302- GAP: fix gap_connect_cancel for gap_connect_with_whitelist 303- GAP: fix race condition that causes duplicate authenticate request 304- SM: address update for non-resolvable private addresses 305- SM: reset state on power off transition 306- L2CAP: Fix accept incoming ERTM connection when Information Request already complete 307- A2DP Sink: fix config API for AAC, ATRAC, and other codecs 308- HFP: try next link setting for SCO connection failure after SCO reject errors 309- HFP AG: activate all AG indicators upon service level connection establishment 310- HFP AG: handle call termination in alerting call state 311- HFP HF: fix parsing of phone number for voice tag 312- HFP HF: report HFP_SUBEVENT_NETWORK_OPERATOR_CHANGED event 313 314### Changed 315- HCI: use ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS to rejected classic connections 316- SM: pairing events indicate if LE Secure Connection will be used 317- A2DP: new a2dp.c contains shared code of Sink and Source roles 318- A2DP Sink: automatically configure stream endpoint for outgoing connections 319- HFP AG: drop unused number parameter from hfp_ag_outgoing_call_initiated 320- libusb: command line options to delete TLV and specify log file path 321- Windows: native implementations of btstack_tlv_window, hci_dump_windows_fs, hci_dump_window_stdout 322 323## Release v1.5.2 324 325### Added 326- GAP: ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS serializes Inquiry, Remote Name Request and Create Connection operations 327- GAP: support extended advertising with ENABLE_LE_EXTENDED_ADVERTISING 328- GAP: gap_enable_link_watchdog() uses automatic flush timeout to disconnect if data cannot be sent 329- GAP: gap_secure_connections_active() to query if BR/EDR Secure Connecions are possible 330- ATT DB: provide gatt_server_get_handle_range_for_service_with_uuid16 to find included service within handle range 331- GATT Service: Audio Input Control Service Server (AICS 1.0) 332- GATT Service: Microphone Control Service Server (MCS 1.0) 333- GATT Service: Published Audio Capabilities Service Server (PACS 1.0) 334- GATT Service: Volume Control Service Server (VCS 1.0) 335- GATT Service: Volume Offset Control Service Server (VOCS 1.0) 336 337### Fixed 338- POSIX: fix RTS/CTS configuration by keeping local termios copy in btstack_uart_posix 339- HCI: fix handling of HCI Connection Complete with error (regression introduced in v1.5.1) 340- GAP: disable scanning, advertising, connection before updating random address 341- GAP: fix LE Scan with whitelist 342- HFP_AG: fix tracking for call dropped during outgoing ringing 343- HFP: Free HFP Connection object on SDP error / Service not found 344- PBAP Client: emit operation complete with status OBEX_ABORTED 345 346### Changed 347- Chipset: use da145xx in folder/file/function names for Dialog Semiconductor SoCs 348- GAP: set min encryption key size during init, if supported 349- AVDTP: use BLUETOOTH_SERVICE_CLASS_AUDIO_SINK / SOURCE instead of BLUETOOTH_PROTOCOL_AVDTP in SDP queries 350- ATT Server: use uint8_t for status returns 351- libusb, POSIX and Windows ports: use '-' instead of ':' in btstack_BD_ADDR.tlv filename 352 353 354## Release v1.5.1 355 356### Added 357- GOEP Client: add goep_client_version_20_or_higher 358- ESP32: implement audio source 359 360### Fixed 361- PBAP Client: support disconnect while operation is ongoing 362- PBAP Client: use SRM only if GOEP v2.0 or higher connection 363- PBAP Client: emit vCard entry data as PBAP_DATA_PACKET 364- L2CAP: limit remote MTU by local tx configuration in ERTM 365 366### Changed 367- Example: init SM if LE supported to avoid issue with Android Cross-Transport Key-Derivation 368- ESP32: update sdkconfig for esp-idf v4.3, disable Bluedroid host stack 369- ESP32: use I2S configuration from ESP32 LyraT V4.3 370 371 372## Release v1.5.0 373 374### Added 375- HCI Dump: Support BTSnoop format in hci_dump_posix_fs.c for format = HCI_DUMP_BTSNOOP 376- HCI Dump RTT STDOUT: drop messages if RTT buffer is full and RTT is configured for non-blocking 377- HCI: hci_remove_event_handler to remove packet handler 378- hci_cmd: support variable length fields and arrayed parameters 379- GAP: ENABLE_EXPLICIT_LINK_KEY_REPLY allows for asynchronous link key lookup by application 380- GAP: gap_set_page_timeout to set Page Timeout 381- GAP: gap_inquiry_set_scan_activity to set Inquiry Scan Activity 382- L2CAP: emit L2CAP_EVENT_INFORMATION_RESPONSE event with extended features and fixed channels supported 383- L2CAP: support Enhanced Credit-based Flow-Control Mode for connection-oriented channels over BR/EDR/LE 384- A2DP: allow to register media codec validator for sink and source with: 385 - `a2dp_sink_register_media_config_validator` 386 - `a2dp_source_register_media_config_validator` 387- 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 388- OBEX: new obex_parser for chunked OBEX data 389- SM: Support Cross-Transport Key-Derivation (CTKD) of LE LTK from BR/EDR SC Link Key in Responder role 390- SM: sm_remove_event_handler to remove packet handler 391- GATT Service: Bond Management Service (BMS 1.0) Server 392- GATT Service: Microphone Control Service (MICS 1.0) Server 393- GATT Service: TX Power Service (TPS 1.0) Server 394- POSIX: btstack_signal allows to register for callback on signal, e.g. ctrl-c 395- Windows: btstack_stdin_window_register_ctrl_c_callback allows to register for ctrl-c 396 397### Fixed 398- A2DP Source: fix reconfigure 399- AVRCP Controller: prevent registering of notifications for unsupported events 400- RFCOMM: fixed handling of remote port configuration command 401- HFP AG: fix accept incoming connection while audio connection is established 402- PBAP Client: handle chunked vCard Listing 403- PBAP Client: use new streaming obex_parser to handle chunked OBEX data 404- SM: Work around for unexpected Windows 10 disconnect for BR Secure Connections (SMP over BR timeout) 405- SM: support storing bonding information for devices with identical IRK but different public addresses 406- GAP: restart advertising when private address changes 407- le_device_db_tlv: keep number of devices reported by le_device_db_count if old entry is replaced 408 409### Changed 410- Drop iOS support 411- HCI: provide status instead of undocumented int error code and bool for API functions 412- HCI: use 1000 ms watchdog to force power off for hci_power_control(HCI_POWER_OFF) 413- GAP: local name, EIR data, class of device and default link policy can be updated at any time 414- L2CAP: provide status instead of undocumented int error code and bool for API functions 415- L2CAP: remote features not required for SDP connections 416- L2CAP: replaced l2cap_register_packet_handler with l2cap_add_event_handler to register multiple handlers 417- L2CAP: drop reason parameter in l2cap_disconnect 418- L2CAP: use official terminology for L2CAP channel modes - ENABLE_L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE replaces ENABLE_LE_DATA_CHANNELS 419- L2CAP: unify API for can send now, request to send, and send packet and disconnect channel 420- L2CAP: unify events for can send now, packet sent, channel closed (CbM/ECBM using existing events) 421- RFCOMM: `RFCOMM_EVENT_PORT_CONFIGURATION` contains rfcomm_cid and remote flag, emitted for query config 422- RFCOMM: provide status instead of undocumented int error code and bool for API functions 423- RFCOMM: remote port configuration, line status, and modem status are sent by channel state machine 424- HSP: add ACL Connection to all events and BD ADDR to HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE 425- HFP: API functions return status code if appropriate 426- HFP: removed one parameter from hfp_ag/hf_activate_voice_recognition function, introduce hfp_ag/hf_deactivate_voice_recognition instead 427- HFP: merged legacy and enhanced Voice Recognition Activation (VRA) API. If available enhanced mode will be preferred. 428- 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. 429- 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. 430- AVDTP: media config validator is called with preview of media codec configuration event and configured separately for sink/source 431- AVRCP: use PANEL as default unit + subunit info 432- AVRCP Controller: automatically query supported events when registering for notifications 433- AVRCP Target: cache companies and events in library and remove need to answer query in application callback. Use Bluetooth SIG as default company. 434- Run Loop: new functionality for HCI transport drivers and inter-process communication: 435 - *btstack_run_loop_poll_data_sources_from_irq*: used to transfer control from IRQ handler to main thread/run loop 436 - *btstack_run_loop_execute_on_main_thread*: schedule code execution on main thread from other thread 437 - *btstack_run_loop_trigger_exit*: trigger run loop exit 438- POSIX / Windows / Raspi / Qt: use updated ctrl-c handling 439- POSIX TLV: use max value size of 2048, assert in store function if value size is larger 440 441 442## Release v1.4.1 443 444### Added 445- GAP: emit GAP_EVENT_PAIRING_STARTED and GAP_EVENT_PAIRING_COMPLETE 446 447### Fixed 448- GAP: store link key in hci connection struct to allow authenticate after pairing without bonding 449- GAP: avoid requesting authentication twice 450- GAP: cache own address on start advertising and connecting, provide getters 451- GAP: stop LE connecting if create connection fails (e.g. connectable adv active and multiple roles not supported) 452- SM: fix race condition between local address changes and pairing procedure 453- ATT DB: fix spelling `gatt_server_get_handle_range_for_service_with_uuid128`, `gatt_server_get_handle_range_for_service_with_uuid16` 454 455### Changed 456- HCI: update advertising data without stopping advertising first 457- GAP: Drop local bonding flag in IO Capability Reply if remote does not indicate bonding 458- GAP: return status for `gap_set_security_mode` 459- GAP: abort legacy pairing if Level 4 is required 460- GAP: abort SSP on IO Capabilities Request event if Level 4 is required but SC not supported by remote 461- GAP: abort SSP on User Confirmation Request event if Level 3 is required but MITM protection not possible 462- GAP: validate minimal service security level can be reached during pairing in responder role 463- L2CAP: don't trigger hci disconnect if l2cap security requirements are insufficient 464- CVE-2020-26555: reject connections to and from devices with same BD ADDR 465- CVE-2020-26555: ignore NULL link key 466- CVE-2020-26558: abort LE Secure Connection pairing if remote uses the same public key 467 468## Release v1.4 469 470### Added 471- HCI: `btstack_transport_sco.h` supports SCO over physical PCM/I2S interface (`HAVE_SCO_TRANSPORT`) 472- POSIX: `btstack_transport_sco_i2s_test_bridge.c` implements SCO transport interface for UART-to-I2S test bridge 473- btstack_uart: `btstack_uart_t` interface extends `btstack_uart_block_t`: 474 - support sending and receiving SLIP frames for HCI H5 475 - support odd parity 476 - `hci_transport_h4` and chipset drivers have new functions to provide `btstack_uart_t` 477- btstack_uart_slip_wrapper: wrapper that implements SLIP functionality for existing `btstack_uart_block` drivers. 478- hci_transport: add parity field and pass on to `btstack_uart_t` in h4 and h5 479- GATT Client: Battery Service Client 480- GATT Client: Device Information Service Client 481- GATT Client: HID-over-GATT (HOG) Client, Report and Boot Host 482- GATT Client: Scan Parameters Service Client 483- GATT Server: Scan Parameters Service Server 484- GAP: support scan page configuration with `gap_set_page_scan_activity` and `gap_set_page_scan_type` 485- GAP: support sniff subrating with `gap_sniff_subrating_configure` 486- GAP: support QoS setup with `gap_qos_set` 487- AVRCP: new field `button_pressed` in `AVRCP_SUBEVENT_OPERATION` 488- AVRCP: `AVRCP_SUBEVENT_OPERATION` emitted for button release 489- AVRCP Controller: `avrcp_controller_start_press_and_hold_cmd` supports arbitrary device buttons 490- AVRCP Controller: reassemble fragmented AVCTP packets 491- AVDTP: `avdtp_register_media_config_validator` allows to validate media codec configuration 492- A2DP Source: `ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG` disables auto config. requires call to `a2dp_source_set_config_{CODEC}` 493 494### Fixed 495- GAP: calculate IO Cap AuthReq Bondable Mode based on `gap_ssp_set_authentication_requirement` and `gap_set_bondable_mode` 496- GAP: only store link key for SSP if remote side has set bondable in io cap auth requirements 497- GAP: allow to disable link supervision timeout 498- GAP: fix `gap_connect` after `gap_connect_cancel` 499- GAP: re-configure advertisements after power cycle 500- HCI: handle start inquiry failure 501- L2CAP: fix create outgoing connection triggered from packet handler on hci disconnect event 502- L2CAP: return unknown mandatory option in config response 503- AVDTP: fix spelling `avdtp_set_preferred_sampling_frequency` 504- AVRCP Target: fix notification changed event 505- HFP: Emit audio connection released on SLC Release, e.g. on remote power off 506- HFP HF: fix audio connection setup if codec negotiation is supported 507- HFP HF: only emit single event for RING and AG Status updates 508- HFP AG: fix audio connection setup for in-band ringtone on incoming connection 509 510### Changed 511- Port Archive: moved ports that are not recommended for new designs to port/archive folder: 512 - MSP430: the ports used the older community GCC version without 20-bit support needed for code size > 64kB 513 - Broadcom/Cypress H5: uploading PatchRAM is only possible in H4 mode. It's better to also use H4 in general 514 - PIC32-Harmony: the port used Harmony v1 while Harmony v3 has been out since a while 515 - iOS: not supported 516- Run Loop Base: functionality used in most platform run loop implementations 517 - code from `btstack_run_loop_base.c` moved into `btstack_run_loop.c` to minimize changes to build systems 518 - `btstack_run_loop_base.c` is a placeholder and can be removed from build 519- HCI Dump: replace monolithic `hci_dump.c` (with many #ifdefs) into dispatcher with platform-specific implementations: 520 - `posix/hci_dump_posix_fs` - writes binary log file 521 - `posix/hci_dump_stdout` - log to console using printf with local system time 522 - `embedded/hci_dump_embedded_stdout` - log to console using printf 523 - `embedded/hci_dump_segger_stdout` - log to RTT console using `SEGGER_printf` 524 - `embedded/hci_dump_segger_binary` - writes binary log over RTT to host 525- HCI: config I2S for BCM Controllers if `ENABLE_SCO_OVER_PCM`, reduce bit clock to 256/512 kHz 526- btstack_uart_posix: supports SLIP frames and replaces `btstack_uart_block_posix` 527- hci_transport_h5: more performant H5 implementation that requires `btstack_uart_t` driver with SLIP support 528- POSIX Ports: use new `btstack_uart_posix` implementation 529- posix-h5/posix-h5-bcm: use even parity for UART 530- HCI Transport: extract convenience function declaration for h4, h5, em9304_spi, and usb into separate hci_transport_{type}.h 531- GAP: provide Device ID from EIR in GAP_EVENT_INQUIRY_RESULT 532- GAP: only store link key if it allows requested security level 533- GAP: abort SSP pairing if MITM protection required but not possible 534- SM: start pairing as Central for already encrypted connection on Slave Security Request 535- GATT Client: Use ATT_READ_REQUEST for first blob of Read Long Characteristic and Read Long Characteristic Descriptor 536- GATT Server: Allow ATT Read Callback to return custom ATT Error Code 537- Nordic SPP Service Server: use `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` and `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` 538 events instead of callback, and `RFCOMM_DATA_PACKET` for received data 539- u-blox SPP Service Server: use `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` and `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` 540 events instead of callback, and `RFCOMM_DATA_PACKET` for received data 541- HID: Move `src/classic/hid.h` into `src` and prefix with `btstack_` to use it with BLE and avoid name clashes 542- HFP: provide acl_handle in events to identify connection 543- HSP AG: emit HSP_SUBEVENT_BUTTON_PRESSED instead of audio connection setup/release 544- Example: use `btstack_event.h` getters instead of direct array access, use enum to compare status codes 545 546 547## Release v1.3.2 548 549### Added 550- GAP: support for Classic Out-of-Band (OOB) pairing via `gap_ssp_remote_oob_data` with `ENABLE_CLASSIC_OOB_PAIRING` 551- GAP: read local OOB data on start and on call to `gap_ssp_generate_oob_data`, provided via `GAP_EVENT_LOCAL_OOB_DATA` 552- HID Host: add profile, update `hid_host_demo.c` example 553 554### Fixed 555- L2CAP: make handling of HCI disconnect more robust 556- AVDTP: emit stream release for active stream if signaling connection is closed first, e.g. caused by HCI disconnect 557- AVRCP: fix issue when Controller and Target send at the same time 558 559### Changed 560- A2DP, AVDTP: use `a2dp_source_set_config_{TYPE}` and `avdtp_config{TYPE}_store` to avoid large number of parameters 561 562 563## Release v1.3 564 565### Added 566- CC256x: with ENABLE_CC256X_ASSISTED_HFP, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 567- BCM: with ENABLE_BCM_PCM_WBS, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 568- SDP Client RFCOMM: add `sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid` 569- HFP: `ENABLE_HFP_AT_MESSAGES` lets HFP emit `HFP_SUBEVENT_AT_MESSAGE_SENT` and `HFP_SUBEVENT_AT_MESSAGE_RECEIVED` 570- A2DP, AVDTP: provide capabilities and configuration events for A2DP codecs: SBC, MPEG Audio, MPEG AAC, ATRAC 571- A2DP + AVDTP Source: allow to send media packet with `avdtp_source_stream_send_media_packet` and `a2dp_source_stream_send_media_packet` 572- A2DP + AVDTP Source: add `avdtp_source_stream_send_media_payload_rtp` and `a2dp_source_stream_send_media_payload_rtp` 573- A2DP Source: emit `A2DP_SUBEVENT_SIGNALING_CAPABILITIES_COMPLETE` 574- A2DP Source: allow to configure endpoints by calling `a2dp_source_set_config_{TYPE}` during SEP discovery with SBC fallback 575 576### Fixed 577- HCI: keep `le connecting request` on connection complete active, fixes gap_auto_connection_stop() + gap_auto_connection_start() 578- L2CAP: fix packet size check for incoming classic basic channels (regression introduced in v1.2.1) 579- HFP AG/HSP AG: avoid connecting to remote service with same role 580- A2DP Source: support multiple Stream Endpoints with different Media Codec types 581- A2DP Source: emit codec configure event with reconfigure flag set on reconfigure 582- GATT Compiler: support multiple instances of the same service 583 584### Changed 585- GAP: provide Link Type parameter to incoming connection filter for `gap_register_classic_connection_filter` 586- HFP/GOEP Client/AVDTP/A2DP: return `SDP_SERVICE_NOT_FOUND` if no suitable SDP record is found 587- AVDTP Source: `avdtp_source_stream_send_media_payload` includes SBC Header and was deprecated 588- AVDTP/A2DP: use `avdtp_channel_mode_t` in `A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION` 589- A2DP: fix events and use `a2dp_cid`, `local_seid,` `remote_seid` field names in A2DP sub-events 590- GATT Client: Skip MTU exchange after MTU exchange on ATT Server 591- Ports: STM32-F103RB Nucleo + CC256x port removed 592- ESP32: enabled HFP Wide-Band Speech, disable classic secure connections in HSP/HFP demos 593 594 595## Release v1.2.1 596 597### Fixed 598- L2CAP: use connection handle for channel lookups 599- L2CAP: forward data only in open state 600 601### Changed 602- L2CAP: check packet size against local mtu for classic basic channels 603 604 605## Release v1.2 606 607### Fixed 608- L2CAP: trigger pairing for outgoing LE Data Channels if security level insufficient 609- SM: fix update of sc flag for re-encrypted connection in peripheral role 610- SM: send security request on re-connect if bonded and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is defined 611- ESP32: fix audio sink driver 612 613### Added 614- GAP: `gap_delete_bonding` removes device from LE Resolving List and from discards LE bonding information 615- GATT Client: delete bonding information if re-encryption fails and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is not defined 616- GATT Client: gatt_client_set_required_security_level() allows to set required minimum security level for all GATT requests 617- SM: emit events for re-encryption started/complete when bonding information is available 618 619### Changed 620- AVRCP Controller: allow to send multiple absolute volume commands without waiting for response. 621- GAP: replaced `ENABLE_LE_CENTRAL_AUTO_ENCRYPION` with `ENABLE_LE_PROACTIVE_AUTHENTICATION` 622 623 624## Changes October 2020 625 626### Fixed 627- AVDTP Initiator: avoid use of remote seid for stream endpoint lookup, fixes issue with two connected devices 628- AVDTP Source: buffer for SBC media codec information got discarded, leading to invalid Set Configuration command in second connection 629- SM: only trigger Cross-Transport Key Derivation (CTKD) when bonding is enabled 630- SM: set LinkKey flag to request CTKD if enabled 631- SM: store CTKD key with Public Identity Address 632- SM: only allow CTKD to overwrite existing link key if derived key has same or higher authentication 633- SM: start SMP Timeout when sending Security Request 634- HFP HF: fix response to AG Codec Selection while waiting for OK of parallel command 635- HCI: fix reject of LE remote connection param request via HCI 636 637### Added 638- GAP: add `gap_get_link_key_for_bd_addr` 639- GAP: add `gap_bonded` to check if bonding information is available for active connection 640- SM: support h7 for CTKD 641 642### Changed 643- SM: Cross-Transport Key Derivation requires `ENABLE_CROSS_TRANSPORT_KEY_DERIVATION` now 644- SM: block connection if encryption fails for bonded devices as Central 645- SM: support pairing as Central after failed re-encryption 646 647 648## Release v1.1 649 650### Fixed 651- AVRCP/AVCTP: report AVRCP 1.6 and AVCTP 1.4 in SDP record 652 653### Added 654 655### Changed 656 657 658## Changes September 2020 659 660### Fixed 661- HFP: fix parsing of ranges e.g. in +CIND responses 662- AVDTP, AVRCP: fix bugs due to transaction id overrun 663- A2DP Source: fix issues with stream configuration by sink 664- hci_dump: fix tv_us calculation for non-posix / embedded systems with binary output 665 666### Added 667- `btstack_ring_buffer`: add `btstack_ring_buffer_reset` to reset it to initial state/empty 668- GAP: Support for address resolution of resolvable private addresses by Controller with `ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION` 669 670### Changed 671- AVDTP, AVRCP, HSP: schedule SDP query, avoids avoids 'command disallowed' if SDP client is busy 672- HSP, HFP: allow to configure usable SCO packet types 673- cc256x: update CC256xC init script to v1.4 674- A2DP Source: use Get All Capabilities if supported by remote get Delay Reporting capability 675 676## Changes August 2020 677 678### Fixed 679- ESP32: fix authentication for incoming Secure Connections 680- AVDTP: Fix forwarding of Delay reports 681- STM32-F4Discovery: fix pan_lwip_http_server by increasing HCI_ACL_PAYLOAD_SIZE 682- tool/create_packet_log: basic support for 16-bit Unicode log files from Windows 683 684### Added 685- `btstack_run_loop_base`: added `btstack_run_loop_base_dump_timer` 686- GAP: request role change for classic connection via `gap_request_role` 687- GAP: LE Whitelist API with `gap_le_whitelist_x` with x = add, remove, clear and new `gap_connect_with_whitelist` 688- SDP Client: add sdp_client_register_query_callback() allows to register query request instead of polling sdp_client_ready() 689- BNEP lwIP: add `bnep_lwip_connect` to establish BNEP connection and manage lwIP network interface 690- New `btstack_linked_queue` utility, a linked list-based queue with first-in-first-out semantics and constant time enqueue/dequeue operations 691- btstack_tlv_posix: add `btstack_tlv_posix_deinit` 692- New `btpclient` for use with [auto-pts project](https://github.com/intel/auto-pts) 693 694### Changed 695- GAP: treat AES-CCM encrypted connection as mutually authenticated (BIAS) 696- GAP: 'gap_auto_connect_x' API deprecated. Please directly manage LE Whitelist with `gap_le_whitelist_*` functions and call `gap_connect_with_whitelist` instead 697- example/hid_host_demo: try to become master for incoming connections 698- btstack_run_loop: use btstack_assert instead of local while(true) 699- att_db_util: allow to reset att_db via `att_db_util_init` 700 701## Changes July 2020 702 703### Fixed 704- AVDTP: fix invalid response for Get Capabilities request if Delay Reporting was supported 705- AVDTP: handle concurrent signaling establishment with reject and retry 706 707### Added 708- example/hid_host_demo: support reconnect from HID device 709- Crypto: support software AES128 for AES-CCM operations 710- AVRCP: introduced AVRCP_FEATURE_MASK_* as alternative to avrcp_controller_supported_feature_t and avrcp_target_supported_feature_t enums 711- btstack_audio: add set_volume() to sink and set_gain() to source interfaces, minimal volume control for portaudio playback 712- 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 713- GAP: Provide gap_get_role to query master/slave role for HCI connection handle 714- GAP: Provide gap_pin_code_response_binary to use binary data as PIN, e.g. for pairing with Nintendo Wii Remote 715 716### Changed 717- GAP: set minimum required encryption key size for Classic connections back from 16 to 7, matching the Core spec 718 719 720## Changes June 2020 721 722### Fixed 723- HFP: Fix parsing of empty fields, e.g. phone number in +CLCC and other AT commands 724- SM: Fix validation of confirm value for secure connection Passkey entry 725- AVRCP: handle concurrent signaling establishment with reject and retry 726 727### Added 728- GAP: Detect Secure Connection -> Legacy Connection Downgrade Attack by remote features and actual encryption type (BIAS) 729- GAP: Mutual authentication: request authentication after Classic connection got encrypted (BIAS) 730- Windows port for Dialog DA14585 connected via serial port 731 732## Changes 733- CVSD PLC: treat zero frames as good and allow to mark data as bad, e.g. if reported by Controller as erroneous 734 735## Changes May 2020 736 737### Fixed 738- hfp_hf, hsp_hs: use eSCO params in accept sco connection only for incoming eSCO connections 739- pbap_client: fix PBAP UUID len on connect message 740- SM: fix secure connection pairing as peripheral when local user confirmation happens after remote one 741- A2DP Source: only connect to remote sink stream endpoints 742- btstack_hal_flash_memory: fix write of 0xff bytes to simulated flash 743- hsp_hs: fix disconnect if audio not connected 744- hsp_ag: fix accept incoming connection 745 746### Added 747- example/le_mitm: MITM implementation that forwards ATT PDUs and allows for pairing 748- GAP: gap_set_security_level sets required security level for incoming and outgoing connections 749- cc256x: allow to specify power vector for each modulation type 750- FreeRTOS: btstack_run_loop_freertos_trigger_exit allows to request run loop exit 751- SM: support LE Secure Connections Only mode with sm_set_secure_connections_only_mode 752- GAP: enable BR/EDR Secure Connections if supported, add gap_secure_connections_enable 753 754### Changed 755- L2CAP ERTM: send extended features request only once per HCI connection 756 757 758## Changes April 2020 759 760### Fixed 761- hog_mouse_demo/hog_keyboard_demo: handle set protocol mode = boot protocol mode 762- HCI: only update BD_ADDR placeholder in shortened and complete name in EIR data, limit device name to 240/248 bytes 763 764### Added 765- GAP: gap_set_allow_role_switch allows to prevent role switch in outgoing classic ACL connections 766- example: hog_boot_host_demo implements an HID-over-GATT Boot Host that supports keyboard and mouse 767- HCI: add ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS that forces fragmentation of ACL-LE packets to fit into over-the-air packet 768 769### Changed 770- Broadcom/Cypress: wait 300 ms after PatchRAM update in hci.c to assert Controller is ready 771- esp32: provide esp-idf/component/btstack/btstack_port_esp32.c and only minimal app_main in template/main/main.c 772- att_db: skip att_read_callback for ATT Read Blob Request if offset == value_len 773 774 775## Changes March 2020 776 777### Fixed 778- GAP: fixed gap_set_scan_parameters() if issued right before gap_start_scan() 779- HCI: only send HCI Read Local Encryption Key Size if supported by Controller 780 781### Added 782- GATT Client: allow to register for any notification/indication and/or any connection 783- HCI: added hci_read_inquiry_scan_activity and hci_write_inquiry_scan_activity commands 784- chipset: assert hci packet buffers are suitable for firmware upload or patches (atwilc3000,bcm,cc256x,intel) 785- btstack_util: added btstack_replace_bd_addr_placeholder 786 787### Changed 788- AVRCP Target: volume in avrcp_target_volume_changed is reported as current value in interim response to register for volume change notifications 789- SDP Client: query attributes 0x0000..0xffff instead of 0x0001..0xffff to match other stacks / improve compatibility with bad sdp server implementations 790 791 792## Changes Februar 2020 793 794### Fixed 795- AVRCP Target: fix reporting of PLAYBACK_STATUS_CHANGED 796- HCI: handle reconnect request for Classic and LE connections triggered by packet handler for Disconnection Complete Event 797 798### Changed 799- hid_host_mode: allow sniff mode 800 801### Added 802- 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 803 804 805## Changes January 2020 806 807### Fixed 808- L2CAP ERTM: avoid read-after-free on decline of incoming connection 809- GATT Client: set uuid16 to zero when deserializing uuid128 services, characteristics, and descriptors 810- att_db_util: fix realloc of att db buffer for large attributes 811- btstack_tlv_posix: only keep last value in memory, fix delete operation 812- l2cap_signaling: use packet boundary flags 0x00 for LE signaling packets (ignoring hci_non_flushable_packet_boundary_flag_supported()) 813 814### Added 815- att_db_util: provide GATT Database Hash via att_db_util_hash_calc 816- GATT Compiler: provide GATT Database Hash via GATT_DATABASE_HASH Characteristic 817- ATT Server: validate request pdu length 818 819### Changed 820- Crypto: update AES-CMAC implementation to access all message bytes sequentially 821 822 823## Changes December 2019 824 825### Fixed 826- example/pan_lwip_http_server: use Network Access Point, CoD 827- sm: emit pairing complete in master role when no keys are distributed / bonding disabled 828 829### Added 830 831### Changed 832- Updated CC256x initscript: CC256xC v1.3 833- ESP32: add CMake project files 834 835 836## Changes November 2019 837 838### Fixed 839- AVDTP Source: return correct `avdtp_cid` and `local_seid` in `AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW` 840- L2CAP: send LE Data Channel SDUs round robin with other data 841- L2CAP ERTM: send ERTM I-frames round robin with other data 842 843### Added 844- ATT Server: return error if request to send now for Notification or Indication already registered 845- Linked List: return if item was added for `btstack_linked_list_add[_tail]` 846- btstack_run_loop_remove: return bool true if timer/data source was removed 847- segger-rtt: allow to configure with `SEGGER_RTT_PACKETLOG_*` directives, update to v6.54 848- GAP: support setting Link Supervision Timetout for outgoing Classic connections using `gap_set_link_supervision_timeout` 849- lwip: add download test files to http server demo 850 851### Changed 852- Linked List: return bool true if item was removed 853 854 855## Changes October 2019 856 857### Fixed 858 859### Added 860- `btstack_bool.h`: provide boolean type 'bool' via `<stdbool.h>` or as backport 861- provide `btstack_assert(condition)` 862- H4 Transport: avoid calling `hci_transport_h4_trigger_next_read` when transport is closed 863 864### Changed 865- libusb and posix ports: store bonding information in TLV 866 867 868## Changes September 2019 869 870### Fixed 871- L2CAP ERTM: assert that packet can be stored in fragment buffers in ertm 872- L2CAP ERTM: reject incoming connection if ERTM is configured as mandatory but not supported by remote 873- GATT Client: allow Write Without Response independent of other requests 874 875### Added 876- GAP: allow to reject GAP classic connection via gap_register_classic_connection_filter 877- GAP: support reading RSSI for Classic+LE using gap_read_rssi. Emits `GAP_EVENT_RSSI_MEASUREMENT` 878 879### Changed 880- Bluetooth and BTstack Error Codes and Events: collect status codes in bluetooth.h and events in btstack_defines.h 881- bluetooth.h: extract internal defintitions to respective protocol layers 882- Updated CC256x initscripts (CC256xB v1.8, CC256xC v1.2, CC256xC v1.2) 883 884 885## Changes August 2019 886 887### Fixed 888- POSIX, WICED, Windows, FreeRTOS run loops: handle time_ms overrun after 49 days 889- RFCOMM: accept incoming L2CAP connection in Basic mode if ERTM is enabled but not requested for this connection 890- RFCOMM: limit RFCOMM MTU by local L2CAP MTU for outgoing connections (only revelvant for ERTM) 891- L2CAP ERTM: stop timers on disconnect 892- L2CAP ERTM: fix sending of segmented SDUs 893- L2CAP ERTM: handle unsupported Information Response 894- SM: generate local nonce for confirm value in JW+NC+PK in Secure Connections Responder role 895 896### Added 897- `btstack_run_loop_base`: portable implementation of timer and data source management as base for platform specific implementations 898 899## Changed 900- FreeRTOS: use xQueueCreateStatic (static variant of xQueueCreate) if available for static memory-only setups 901- L2CAP ERTM: handle invalid Information Response (assume no extended features supported) 902- POSIX: use monotonic clock as timebase if available 903- HCI Transport H4/H5/EM9304 SPI: ignore block read/sent from UART driver when closed 904- HCI: Read Encryption Key Size after encryption was enabled 905- Errata 11838: 906 - GAP: gap_set_required_encryption_key_size allows to set the required key size, default = 16 (max) 907 - GAP: validate encryption key size to emit GAP Security Levels 908 909## Changes July 2019 910 911### Fixed 912- SM: Fixed regression introduced in f3582630 913- L2CAP: avoid reading l2cap signaling command len out of bounds 914- HCI Transport H4/H5/EM9304 SPI: fix payload size checks (also for 8/16-bit platforms) 915 916### Changed 917- SM: Start encryption upon receiving slave securiy request if bonded 918- hci: use 2 as HCI_INCOMING_PRE_BUFFER_SIZE in LE-only configuration for GATT Client 919 920--- 921 922## Changes June 2019 923 924### Changed 925- FreeRTOS: use freertos/.. prefix to include FreeRTOS headers if HAVE_FREERTOS_INCLUDE_PREFIX is defined 926- BNEP: add Connection Handle to BNEP_EVENT_CHANNEL_OPENED 927- Examples: renamed le_counter to gatt_counter and le_streamer to le_streamer_server to indicate support for GATT over BR/EDR 928 929### Fixed 930- BNEP: Bluetooth address is stored in little-endian format for all BNEP_EVENT_* 931- libusb: avoid use-after-free for SCO packets on disconnect 932 933### Added 934- example: pan_lwip_http_server using lwIP as network stack to implement PAN NAP service 935- platform/lwip/bnep_lwip.c: BNEP lwIP adapter that forwards packets between BNEP service and lwIP 936- ENABLE_GATT_OVER_CLASSIC enables support for GATT over BR/EDR in att_server 937 938--- 939 940## Changes May 2019 941 942### Changed 943- ESP32: Configure SCO over HCI after power up 944- btstack_tlv_flash_bank: support targets where a value cannot be overwritten with zero. When ENABLE_TLV_FLASH_EXPLICIT_DELETE_FIELD 945 is defined, an explicit delete field is used to indicate an invalid entry. 946 947### Fixed 948- SM: Avoid potential use-after-free on immediate disconnect (lookup connection via con handle instead of storing pointer) 949 950### Added 951- gatt_client: emit query complete event for signed write operation 952- hci_transport_h4: add workaround for flow control bug in CYW2070x, enable with ENABLE_CYPRESS_BAUDRATE_CHANGE_FLOWCONTROL_BUG_WORKAROUND 953 954--- 955 956## Changes April 2019 957 958### Changed 959- ESP32: use micro-ecc from 3rd-party as esp-idf removed it in their 3.3 release 960 961### Fixed 962- hci: pad LE Scan response with zeroes 963- SM: store local CSRK 964- ATT DB: call write callback for validated signed writes 965- ATT Server: abort signed write validation on incoming new request 966- Bluetooth SIG web scraping tools updated 967- libusb: compiles for FreeBSD 968 969### Added 970 971--- 972 973## Changes March 2019 974 975### Changed 976- use Makefile for stm32-f4discovery-cc256x port 977- le_device_db: add secure_connection argument to le_device_db_encryption_set and le_device_db_encryption_get 978 979### Fixed 980- SM: Use provided authentication requirements in slave security request 981 982### Added 983- port/stm32-f4discovery-cc256x: add support for built-in MEMS microphone 984- SM: Track if connection encryption is based on LE Secure Connection pairing 985- ATT DB: Validate if connection encrypted is based on SC if requested 986- att_db_util: support ATT_SECURITY_AUTHENTICATED_SC permission flag 987- GATT Compiler: support READ_AUTHENTICATED and WRITE_AUTHENTICATED permsission flags 988- ESP32: erase nvs flash is newer nvs version found 989- libusb: add support for nRF52840-PCA10056 running Zephyr hci_usb example 990- port/stm32-l073rz-nucleo-em9304 for Nucleo L073RZ with EM9304 DVK, replaces port/stm32-l053r8-nucleo-em9304 991 992## Changes February 2019 993 994### Changed 995- example/a2dp_sink_demo: use linear resampling to fix sample rate drift 996- btstack_audio: split interface into sink and source 997 998### Fixed 999- Crypto: fix lockup when stack is shutdown while waiting for result of HCI Command, e.g. LE Read Local P256 Public Key 1000- SM: Avoid SM_EVENT_PAIRING_COMPLETE with ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION after successful pairing in responder role 1001 1002### Added 1003- example/a2dp_sink_demo: add target role, support volume control on both devices 1004- example/audio_duplex: playback audio audio source on audio sink (test audio path) 1005- btstack_audio_embedded: implement audio source path 1006 1007--- 1008 1009## Changes January 2019 1010 1011### Changed 1012- L2CAP: provide channel mode (basic/ertm) and fcs option in L2CAP_EVENT_CHANNEL_OPENED 1013- RFCOMM: support L2CAP ERTM. Callbacks passed to rfcomm_enable_l2cap_ertm() are used to manage ERTM buffers 1014 1015### Added 1016- L2CAP: emit L2CAP_EVENT_ERTM_BUFFER_RELEASED if ERTM buffer not needed/used anymore 1017- L2CAP: add fcs_option to ERTM config l2cap_ertm_config_t 1018- HCI: validate advertisement data length field when generating GAP_EVENT_ADVERTISING_REPORT 1019- ad_parser: validate data element length fields in ad_iterator_has_more 1020- Raspberry Pi 3 A+/B+ port in port/raspi, starts without power cycle 1021 1022### Fixed 1023- HCI: release outgoing buffer on disconnect if waiting to send another ACL fragment 1024- POSIX: use correct baudrate enums for baud rates higher than 921600 (Linux) 1025- Crypto: directly process queued crypto operation on HCI result 1026 1027--- 1028 1029## Changes December 2018 1030 1031### Added 1032- SM: generate and store ER / IR keys in TLV, unless manually set by application 1033- hci_dump: support PacketLogger or BlueZ format output via SEGGER RTT Channel 1 Up 1034 1035### Fixed 1036- SM: fix internal buffer overrun during random address generation 1037 1038## Changes November 2018 1039 1040### Added 1041- GAP: gap_le_connection_interval provides connection interval for conn handle 1042- Nordic SPP Service Server: GATT service that emulates a serial port over BLE based on Nordic Semiconductor documentation. 1043- uBlox SPP Service Server: GATT service that emulates a serial port over BLE based on uBlox documentation. 1044- SM: ENABLE_LE_CENTRAL_AUTO_ENCRYPTION triggers automatic encryption on connect to bonded devices 1045- SM: generate and store ER / IR keys in TLV, unless manually set by application 1046 1047### Fixed 1048- SM: prevent random address updates if gap_random_address_set was used 1049- SM: fix internal buffer overrun that can cause storing of bonding information to fail 1050- SM: ignore Slave Security Request after sending own Pairing Request 1051- L2CAP: fix use after free on disconnect if ERTM is enabled 1052- HFP: Handle multiple commands/responses in single RFCOMM packet 1053- Memory Pools: clear all buffers before use 1054 1055--- 1056 1057## Changes October 2018 1058 1059### Added 1060- SDP Server: queue incoming connections when already connected instead of rejecting them 1061- 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. 1062- HIDS Device: GATT service that exposes HID reports intended for HID Devices, like keyboard and mouse. 1063 1064### Fixed 1065- HCI: fix bug in gap_inquiry_stop that triggered additional GAP_EVENT_INQUIRY_COMPLETE instead of stopping the inquiry 1066- L2CAP: fix issue with outgoing connection before read remote supported complete when other channels exist 1067- L2CAP ERTM: allow SDU of szie MPS in first packet that contains L2CAP SDU Length 1068- L2CAP ERTM: fix memory corruption triggered if local_mtu > mps 1069- L2CAP ERTM: fix outgoing fragment management 1070- HFP: decline incoming RFCOMM connection after outgoing connection was started 1071- AVRCP: fix crash on disconnect of connection established by remote 1072 1073--- 1074 1075## Changes September 2018 1076 1077### Fixed 1078- HCI: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 1079- L2CAP: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 1080- L2CAP: Evaluate 'can send now' on HCI Disconnect as ACL buffers in Bluetooth Controller have been used for the closed connection are freed implicitly 1081- L2CAP: Check can send now before sending extended information requeste needed for ERTM mode 1082- L2CAP: Use valid signaling identifier for L2CAP Connection Parameter Update Request 1083- 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 1084- RFCOMM: Avoid use-after-free on channel finalize 1085- GATT Client: stop timer on disconnect - fixes use after free / crash 1086 1087### Added 1088- A2DP Source: Support stream reconfiguration (a2dp_source_reconfigure_stream_sampling_frequency) 1089- 3rd-party: yxml is used for PBAP vCard list parsing 1090- cc256xC: new v1.1 init scripts 1091 1092--- 1093 1094## Changes August 2018 1095 1096### Added 1097- PBAP: added pbap_get_phonebook_size() to get phonebook entry count 1098 1099### Fixed 1100- GATT Server: Allow enable Notifications/Indication with Write Command. Fixes issue with some Android devices. 1101- SM: fix pairing for Secure Connections with Bonding if remote sends additional keys 1102- SM: drop LTK flag from Pairing Response for Secure Connections 1103- L2CAP: fix emitted L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 1104 1105## Changes June 2018 1106 1107### Added 1108- btstack_audio.h: application level API for audio playback and recording 1109- embedded/hal_audio.h: low-level API for audio playback and recording 1110- HID Device: hid_device_connect(..) function 1111- ESP32: implement hal_audio 1112- DA14585: support for Dialog Semiconductor DA14585 LE-only controller 1113- Raspberry Pi 3 + Raspberry Pi Zero W port in port/raspi 1114 1115### Changed 1116- Errata 10734: 1117 - SM: Generate new EC Public Keypair after each pairing 1118 - SM: Abort failure with DHKEY_CHECK_FAILED if received public key is invalid (instead of unspecified error) 1119- btstack.h: only include classic headers if ENABLE_CLASSIC is defined 1120- windows: ignore virtual Bluetooth adapter provided by VMware 1121- Replaced HCI_PACKET_BUFFER_SIZE with HCI_INCOMING_PACKET_BUFFER_SIZE and HCI_OUTGOING_PACKET_BUFFER_SIZE 1122 1123--- 1124 1125## Changes June 2018 1126 1127### Fixed 1128- HFP: Fix Wide Band Speech bit in SDP record for both HF/AG. Missing bit prevents macOS from using mSBC 1129- ATT Server: send ATT_EVENT_HANDLE_VALUE_INDICATION_COMPLETE with status ATT_HANDLE_VALUE_INDICATION_DISCONNECT on disconnect 1130- AVRCP Controller: fix parsing of now playing info 1131 1132### Changed 1133- ATT Server: ATT_HANDLE_VALUE_INDICATION_DISCONNECT is delivered to service handler if registered 1134 1135### Added 1136- ATT Server: packet handler field added to att_service_handler_t to receive: connect/disconnect, atu exchange, indication complete 1137 1138--- 1139 1140## Changes May 2018 1141 1142### Added 1143- GAP: re-encrypt outgoing connection if bonded 1144- ATT Server: wait until re-encryption is complete 1145- GATT Client: wait until re-encryption is complete 1146- ATT Server: added att_server_request_to_send_notification and att_server_request_to_send_indication 1147- GATT Client: if ENABLE_GATT_CLIENT_PAIRING, GATT Client starts pairing and retry operation on security error 1148 1149### Changed 1150- ATT Server: att_server_register_can_send_now_callback is deprecated, use att_server_request_to_send_notification/indication instead 1151 1152### Fixed 1153- SM: Fix LE Secure Connection pairing in Central role 1154- le_device_db_tlv: fix seq nr management 1155- SM: improve le_device_db lookup and storing of IRK 1156- GATT Server: fix lookup for Client Characteristic Configuration in services with multiple Characteristics 1157- RFCOMM: emit channel closed on HCI/L2CAP disconnect after sending DISC while expecting UA 1158 1159--- 1160 1161## Changes April 2018 1162 1163### Added 1164- Crypto: btstack_crypo.h provides cryptographic functions for random data generation, AES128, EEC, CBC-MAC (Mesh) 1165- SM: support pairing using Out-of-Band (OOB) data with LE Secure Connections 1166- Embedded: support btstack_stdin via SEGGER RTT 1167 1168### Changed 1169- att_db_util: added security requirement arguments to characteristic creators 1170- SM: use btstack_crypto for cryptographpic functions 1171- GAP: security level for Classic protocols (asides SDP) raised to 2 (encryption) 1172 1173### Fixed 1174- HFP: fix answer call command 1175- HCI: fix buffer overrun in gap_inquiry_explode 1176- SDP: free service record item on sdp_unregister_service 1177 1178## Changes March 2018 1179 1180### Added 1181- GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections 1182- ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c 1183- ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated 1184 1185### Fixed 1186- RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1) 1187- HSP HS: accept incomming SCO connection 1188- SM: fix iteration over LE Device DB entries for bonding and address resolving 1189- SM: store pairing information only if both devices have requested bonding 1190 1191--- 1192 1193## Changes February 2018 1194 1195### Added 1196- GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE 1197- SM: new event SM_EVENT_PAIRING_COMPLETE 1198- GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done 1199- GAP: add gap_delete_all_link_keys 1200 1201### Changed 1202- GATT Client: round robin for multiple connections 1203- ATT Dispatch: round robin for ATT Server & GATT Client 1204- L2CAP: round robin for all L2CAP channels (fixed and dynamic) 1205- btstack_link_key_db: addition functions for link key iteration 1206- GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up 1207- CSR: set all keys in psram instead of default 1208 1209### Fixed 1210- tc3556x: fix startup after baud rate change 1211 1212--- 1213 1214## Changes January 2018 1215 1216### Added 1217- Port for Windows with Zephyr HCI Firmware connected via serial port 1218- em9304: upload patch containers during HCI bootup 1219- Makefile for STM32-F4Discovery port 1220- support for console out via SEGGER RTT 1221- LE Data Channels example in BTstack and [iOS example on GitHub](https://github.com/bluekitchen/CBL2CAPChannel-Demo) 1222- LE Streamer Client can send as fast as possbile as well 1223- L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu 1224 1225### Changed 1226- HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave) 1227- GAP: gap_set_connection_parameters includes scan interval and window params 1228- GATT Client: GATT_EVENT_MTU indicates max MTU 1229- ATT DB Util: attribute handle is returned for new Services and Characteristics 1230 1231### Fixed 1232- Windows: retry serial port operations if not all bytes have been read/written 1233- HFP: avoid buffer overflows setting up messages 1234- SBC Decoder: improved error handling for invalid SBC audio data 1235- GAP: fix Connection Parameter Response in Central role 1236- ATT DB Util: update pointer to database in case of realloc 1237- GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128 1238- GAP: release HCI Connnection after gap_le_conne 1239- ATT: Exchanged MTU is propagate to ATT Server and GATT Client 1240 1241--- 1242 1243## Changes December 2017 1244 1245### Added 1246- Introduced btstack_network.h network interface abstraction 1247- btstack_network_posix implementation using Linux tun/tap interface 1248- WICED: support for btstack_stdin (HAVE_STDIN) 1249- 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. 1250- TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h) 1251- TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c 1252- LE Device DB TLV: overwrite oldest entry if no free entries available 1253- SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role 1254- Example/hid_host_demo with HID parser and support for basic US keyboard layout 1255- 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 1256- Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304) 1257 1258### Changed 1259- panu_demo: uses btstack_network.h now 1260- WICED: configure printf to replace Linefeed with CRLF 1261- SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations 1262 1263### Fixed 1264- RFCOMM: support connection requests during connection failure 1265- L2CAP: support connection requests during connection failure 1266- L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU) 1267- HCI: avoid double free during halting 1268- SM: fixed reconnect using legacy pairing in slave role 1269 1270 1271