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