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