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