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