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 12HCI: `btstack_transport_sco.h` allows to support SCO over physical PCM/I2S interface (`HAVE_SCO_TRANSPORT`) 13POSIX: `btstack_transport_sco_i2s_test_bridge.c` implements SCO transport interface for UART-to-I2S test bridge 14btstack_uart: `btstack_uart_t` interface extends `btstack_uart_block_t`: 15 - supports sending and receiving SLIP frames for HCI H5 16 - suppports odd parity as well 17 - `hci_transport_h4` and chipset drivers have new functions to pass provide `btstack_uart_t` 18btstack_uart_slip_wrapper: wrapper that implements SLIP functionality for existing `btstack_uart_block` drivers. 19hci_transport: add parity field and pass on to `btstack_uart_t` in h4 and h5 20 21### Fixed 22 23### Changed 24HCI: config I2S for BCM Controllers if `ENABLE_SCO_OVER_PCM`, reduce bit clock to 256/512 kHz 25btstack_uart_posix: supports SLIP frames and replaces `btstack_uart_block_posix` 26hci_transport_h5: new more performant H5 implementation that requires `btstack_uart_t` driver with SLIP support. 27POSIX Ports: use new `btstack_uart_posix` implementation 28posix-h5/posix-h5-bcm: use even parity for UART 29Port Archive: moved ports that are not recommended for new designs to port/archive folder: 30 - MSP430: the ports used the older community GCC version without 20-bit support needed for code size > 64kB 31 - Broadcom/Cypress H5: uploading PatchRAM is only possible in H4 mode. It's better to also use H4 in general 32 - PIC32-Harmony: the port used Harmony v1 while Harmony v3 has been out since a while. 33 34## Release v1.3.1 35 36### Added 37GAP: support for Classic Out-of-Band (OOB) pairing via `gap_ssp_remote_oob_data` with `ENABLE_CLASSIC_OOB_PAIRING` 38GAP: read local OOB data on start and on call to `gap_ssp_generate_oob_data`, provided via `GAP_EVENT_LOCAL_OOB_DATA` 39HID Host: add profile, update `hid_host_demo.c` example 40 41### Fixed 42L2CAP: make handling of HCI disconnect more robust 43AVDTP: emit stream release for active stream if signaling connection is closed first, e.g. caused by HCI disconnect 44AVRCP: fix issue when Controller and Target send at the same time 45 46### Changed 47A2DP, AVDTP: use `a2dp_source_set_config_{TYPE}` and `avdtp_config{TYPE}_store` to avoid large number of parameters 48 49 50## Release v1.3 51 52### Added 53CC256x: with ENABLE_CC256X_ASSISTED_HFP, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 54BCM: with ENABLE_BCM_PCM_WBS, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 55SDP Client RFCOMM: add `sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid` 56HFP: `ENABLE_HFP_AT_MESSAGES` lets HFP emit `HFP_SUBEVENT_AT_MESSAGE_SENT` and `HFP_SUBEVENT_AT_MESSAGE_RECEIVED` 57A2DP, AVDTP: provide capabilities and configuration events for A2DP codecs: SBC, MPEG Audio, MPEG AAC, ATRAC 58A2DP + AVDTP Source: allow to send media packet with `avdtp_source_stream_send_media_packet` and `a2dp_source_stream_send_media_packet` 59A2DP + AVDTP Source: add `avdtp_source_stream_send_media_payload_rtp` and `a2dp_source_stream_send_media_payload_rtp` 60A2DP Source: emit `A2DP_SUBEVENT_SIGNALING_CAPABILITIES_COMPLETE` 61A2DP Source: allow to configure endpoints by calling `a2dp_source_set_config_{TYPE}` during SEP discovery with SBC fallback 62 63### Fixed 64HCI: keep `le connecting request` on connection complete active, fixes gap_auto_connection_stop() + gap_auto_connection_start() 65L2CAP: fix packet size check for incoming classic basic channels (regression introduced in v1.2.1) 66HFP AG/HSP AG: avoid connecting to remote service with same role 67A2DP Source: support multiple Stream Endpoints with different Media Codec types 68A2DP Source: emit codec configure event with reconfigure flag set on reconfigure 69GATT Compiler: support multiple instances of the same service 70 71### Changed 72GAP: provide Link Type parameter to incoming connection filter for `gap_register_classic_connection_filter` 73HFP/GOEP Client/AVDTP/A2DP: return `SDP_SERVICE_NOT_FOUND` if no suitable SDP record is found 74AVDTP Source: `avdtp_source_stream_send_media_payload` includes SBC Header and was deprecated 75AVDTP/A2DP: use `avdtp_channel_mode_t` in `A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION` 76A2DP: fix events and use `a2dp_cid`, `local_seid,` `remote_seid` field names in A2DP sub-events 77GATT Client: Skip MTU exchange after MTU exchange on ATT Server 78Ports: STM32-F103RB Nucleo + CC256x port removed 79ESP32: enabled HFP Wide-Band Speech, disable classic secure connections in HSP/HFP demos 80 81 82## Release v1.2.1 83 84### Fixed 85- L2CAP: use connection handle for channel lookups 86- L2CAP: forward data only in open state 87 88### Changed 89- L2CAP: check packet size against local mtu for classic basic channels 90 91 92## Release v1.2 93 94### Fixed 95- L2CAP: trigger pairing for outgoing LE Data Channels if security level insufficient 96- SM: fix update of sc flag for re-encrypted connection in peripheral role 97- SM: send security request on re-connect if bonded and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is defined 98- ESP32: fix audio sink driver 99 100### Added 101- GAP: `gap_delete_bonding` removes device from LE Resolving List and from discards LE bonding information 102- GATT Client: delete bonding information if re-encryption fails and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is not defined 103- GATT Client: gatt_client_set_required_security_level() allows to set required minimum security level for all GATT requests 104- SM: emit events for re-encryption started/complete when bonding information is available 105 106### Changed 107- AVRCP Controller: allow to send multiple absolute volume commands without waiting for response. 108- GAP: replaced `ENABLE_LE_CENTRAL_AUTO_ENCRYPION` with `ENABLE_LE_PROACTIVE_AUTHENTICATION` 109 110 111## Changes October 2020 112 113### Fixed 114- AVDTP Initiator: avoid use of remote seid for stream endpoint lookup, fixes issue with two connected devices 115- AVDTP Source: buffer for SBC media codec information got discarded, leading to invalid Set Configuration command in second connection 116- SM: only trigger Cross-Transport Key Derivation (CTKD) when bonding is enabled 117- SM: set LinkKey flag to request CTKD if enabled 118- SM: store CTKD key with Public Identity Address 119- SM: only allow CTKD to overwrite existing link key if derived key has same or higher authentication 120- SM: start SMP Timeout when sending Security Request 121- HFP HF: fix response to AG Codec Selection while waiting for OK of parallel command 122- HCI: fix reject of LE remote connection param request via HCI 123 124### Added 125- GAP: add `gap_get_link_key_for_bd_addr` 126- GAP: add `gap_bonded` to check if bonding information is available for active connection 127- SM: support h7 for CTKD 128 129### Changed 130- SM: Cross-Transport Key Derivation requires `ENABLE_CROSS_TRANSPORT_KEY_DERIVATION` now 131- SM: block connection if encryption fails for bonded devices as Central 132- SM: support pairing as Central after failed re-ecnryption 133 134 135## Release v1.1 136 137### Fixed 138- AVRCP/AVCTP: report AVRCP 1.6 and AVCTP 1.4 in SDP record 139 140### Added 141 142### Changed 143 144 145## Changes September 2020 146 147### Fixed 148- HFP: fix parsing of ranges e.g. in +CIND responses 149- AVDTP, AVRCP: fix bugs due to transaction id overrun 150- A2DP Source: fix issues with stream configuration by sink 151- hci_dump: fix tv_us calculation for non-posix / embedded systems with binary output 152 153### Added 154- `btstack_ring_buffer`: add `btstack_ring_buffer_reset` to reset it to initial state/empty 155- GAP: Support for address resolution of resolvable private addresses by Controller with `ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION` 156 157### Changed 158- AVDTP, AVRCP, HSP: schedule SDP query, avoids avoids 'command disallowed' if SDP client is busy 159- HSP, HFP: allow to configure usable SCO packet types 160- cc256x: update CC256xC init script to v1.4 161- A2DP Source: use Get All Capabilities if supported by remote get Delay Reporting capability 162 163## Changes August 2020 164 165### Fixed 166- ESP32: fix authentication for incoming Secure Connections 167- AVDTP: Fix forwarding of Delay reports 168- STM32-F4Discovery: fix pan_lwip_http_server by increasing HCI_ACL_PAYLOAD_SIZE 169- tool/create_packet_log: basic support for 16-bit Unicode log files from Windows 170 171### Added 172- `btstack_run_loop_base`: added `btstack_run_loop_base_dump_timer` 173- GAP: request role change for classic connection via `gap_request_role` 174- GAP: LE Whitelist API with `gap_le_whitelist_x` with x = add, remove, clear and new `gap_connect_with_whitelist` 175- SDP Client: add sdp_client_register_query_callback() allows to register query request instead of polling sdp_client_ready() 176- BNEP lwIP: add `bnep_lwip_connect` to establish BNEP connection and manage lwIP network interface 177- New `btstack_linked_queue` utility, a linked list-based queue with first-in-first-out semantics and constant time enqueue/dequeue operations 178- btstack_tlv_posix: add `btstack_tlv_posix_deinit` 179- New `btpclient` for use with [auto-pts project](https://github.com/intel/auto-pts) 180 181### Changed 182- GAP: treat AES-CCM encrypted connection as mutually authenticated (BIAS) 183- GAP: 'gap_auto_connect_x' API deprecated. Please direclty manage LE Whitelist with `gap_le_whitelist_*` functions and call `gap_connect_with_whitelist` instead 184- example/hid_host_demo: try to become master for incoming connections 185- btstack_run_loop: use btstack_assert instead of local while(true) 186- att_db_util: allow to reset att_db via `att_db_util_init` 187 188## Changes July 2020 189 190### Fixed 191- AVDTP: fix invalid response for Get Capabilities request if Delay Reporting was supported 192- AVDTP: handle concurrent signaling establishment with reject and retry 193 194### Added 195- example/hid_host_demo: support reconnect from HID device 196- Crypto: support software AES128 for AES-CCM operations 197- AVRCP: introduced AVRCP_FEATURE_MASK_* as alternative to avrcp_controller_supported_feature_t and avrcp_target_supported_feature_t enums 198- btstack_audio: add set_volume() to sink and set_gain() to source interfaces, minimal volume control for portaudio playback 199- 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 200- GAP: Provide gap_get_role to query master/slave role for HCI connection handle 201- GAP: Provide gap_pin_code_response_binary to use binary data as PIN, e.g. for pairing with Nintendo Wii Remote 202 203### Changed 204- GAP: set minimum required encryption key size for Classic connections back from 16 to 7, matching the Core spec 205 206 207## Changes June 2020 208 209### Fixed 210- HFP: Fix parsing of empty fields, e.g. phone number in +CLCC and other AT commands 211- SM: Fix validation of confirm value for secure connection Passkey entry 212- AVRCP: handle concurrent signaling establishment with reject and retry 213 214### Added 215- GAP: Detect Secure Connection -> Legacy Connection Downgrade Attack by remote features and actual encryption type (BIAS) 216- GAP: Mutual authentication: request authentication after Classic connection got encrypted (BIAS) 217- Windows port for Dialog DA14585 connected via serial port 218 219## Changes 220- CVSD PLC: treat zero frames as good and allow to mark data as bad, e.g. if reported by Controller as erroneous 221 222## Changes May 2020 223 224### Fixed 225- hfp_hf, hsp_hs: use eSCO params in accept sco connection only for incoming eSCO connections 226- pbap_client: fix PBAP UUID len on connect message 227- SM: fix secure connection pairing as peripheral when local user confirmation happens after remote one 228- A2DP Source: only connect to remote sink stream endpoints 229- btstack_hal_flash_memory: fix write of 0xff bytes to simulated flash 230- hsp_hs: fix disconnect if audio not connected 231- hsp_ag: fix accept incoming connection 232 233### Added 234- example/le_mitm: MITM implementation that forwards ATT PDUs and allows for pairing 235- GAP: gap_set_security_level sets required security level for incoming and outgoing connections 236- cc256x: allow to specify power vector for each modulation type 237- FreeRTOS: btstack_run_loop_freertos_trigger_exit allows to request run loop exit 238- SM: support LE Secure Connections Only mode with sm_set_secure_connections_only_mode 239- GAP: enable BR/EDR Secure Connections if supported, add gap_secure_connections_enable 240 241### Changed 242- L2CAP ERTM: send extended features request only once per HCI connection 243 244 245## Changes April 2020 246 247### Fixed 248- hog_mouse_demo/hog_keyboard_demo: handle set protocol mode = boot protocol mode 249- HCI: only update BD_ADDR placeholder in shortened and complete name in EIR data, limit device name to 240/248 bytes 250 251### Added 252- GAP: gap_set_allow_role_switch allows to prevent role switch in outgoing classic ACL connections 253- example: hog_boot_host_demo implements an HID-over-GATT Boot Host that supports keyboard and mouse 254- HCI: add ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS that forces fragmentation of ACL-LE packets to fit into over-the-air packet 255 256### Changed 257- Broadcom/Cypress: wait 300 ms after PatchRAM update in hci.c to assert Controller is ready 258- esp32: provide esp-idf/component/btstack/btstack_port_esp32.c and only minimal app_main in template/main/main.c 259- att_db: skip att_read_callback for ATT Read Blob Request if offset == value_len 260 261 262## Changes March 2020 263 264### Fixed 265- GAP: fixed gap_set_scan_parameters() if issued right before gap_start_scan() 266- HCI: only send HCI Read Local Encryption Key Size if supported by Controller 267 268### Added 269- GATT Client: allow to register for any notification/indication and/or any connection 270- HCI: added hci_read_inquiry_scan_activity and hci_write_inquiry_scan_activity commands 271- chipset: assert hci packet buffers are suitable for firmware upload or patches (atwilc3000,bcm,cc256x,intel) 272- btstack_util: added btstack_replace_bd_addr_placeholder 273 274### Changed 275- AVRCP Target: volume in avrcp_target_volume_changed is reported as current value in interim response to register for volume change notifications 276- SDP Client: query attributes 0x0000..0xffff instead of 0x0001..0xffff to match other stacks / improve compatibility with bad sdp server implementations 277 278 279## Changes Februar 2020 280 281### Fixed 282- AVRCP Target: fix reporting of PLAYBACK_STATUS_CHANGED 283- HCI: handle reconnect request for Classic and LE connections triggered by packet handler for Disconnection Complete Event 284 285### Changed 286- hid_host_mode: allow sniff mode 287 288### Added 289- 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 290 291 292## Changes January 2020 293 294### Fixed 295- L2CAP ERTM: avoid read-after-free on decline of incoming connection 296- GATT Client: set uuid16 to zero when deserializing uuid128 services, characteristics, and descriptors 297- att_db_util: fix realloc of att db buffer for large attributes 298- btstack_tlv_posix: only keep last value in memory, fix delete operation 299- l2cap_signaling: use packet boundary flags 0x00 for LE signaling packets (ignoring hci_non_flushable_packet_boundary_flag_supported()) 300 301### Added 302- att_db_util: provide GATT Database Hash via att_db_util_hash_calc 303- GATT Compiler: provide GATT Database Hash via GATT_DATABASE_HASH Characteristic 304- ATT Server: validate request pdu length 305 306### Changed 307- Crypto: update AES-CMAC implementation to access all message bytes sequentially 308 309 310## Changes December 2019 311 312### Fixed 313- example/pan_lwip_http_server: use Network Access Point, CoD 314- sm: emit pairing complete in master role when no keys are distributed / bonding disabled 315 316### Added 317 318### Changed 319- Updated CC256x initscript: CC256xC v1.3 320- ESP32: add CMake project files 321 322 323## Changes November 2019 324 325### Fixed 326- AVDTP Source: return correct `avdtp_cid` and `local_seid` in `AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW` 327- L2CAP: send LE Data Channel SDUs round robin with other data 328- L2CAP ERTM: send ERTM I-frames round robin with other data 329 330### Added 331- ATT Server: return error if request to send now for Notification or Indication already registered 332- Linked List: return if item was added for `btstack_linked_list_add[_tail]` 333- btstack_run_loop_remove: return bool true if timer/data source was removed 334- segger-rtt: allow to configure with `SEGGER_RTT_PACKETLOG_*` directives, update to v6.54 335- GAP: support setting Link Supervision Timetout for outgoing Classic connections using `gap_set_link_supervision_timeout` 336- lwip: add download test files to http server demo 337 338### Changed 339- Linked List: return bool true if item was removed 340 341 342## Changes October 2019 343 344### Fixed 345 346### Added 347- `btstack_bool.h`: provide boolean type 'bool' via `<stdbool.h>` or as backport 348- provide `btstack_assert(condition)` 349- H4 Transport: avoid calling `hci_transport_h4_trigger_next_read` when transport is closed 350 351### Changed 352- libusb and posix ports: store bonding information in TLV 353 354 355## Changes September 2019 356 357### Fixed 358- L2CAP ERTM: assert that packet can be stored in fragment buffers in ertm 359- L2CAP ERTM: reject incoming connection if ERTM is configured as mandatory but not supported by remote 360- GATT Client: allow Write Without Response independent of other requests 361 362### Added 363- GAP: allow to reject GAP classic connection via gap_register_classic_connection_filter 364- GAP: support reading RSSI for Classic+LE using gap_read_rssi. Emits `GAP_EVENT_RSSI_MEASUREMENT` 365 366### Changed 367- Bluetooth and BTstack Error Codes and Events: collect status codes in bluetooth.h and events in btstack_defines.h 368- bluetooth.h: extract internal defintitions to respective protocol layers 369- Updated CC256x initscripts (CC256xB v1.8, CC256xC v1.2, CC256xC v1.2) 370 371 372## Changes August 2019 373 374### Fixed 375- POSIX, WICED, Windows, FreeRTOS run loops: handle time_ms overrun after 49 days 376- RFCOMM: accept incoming L2CAP connection in Basic mode if ERTM is enabled but not requested for this connection 377- RFCOMM: limit RFCOMM MTU by local L2CAP MTU for outgoing connections (only revelvant for ERTM) 378- L2CAP ERTM: stop timers on disconnect 379- L2CAP ERTM: fix sending of segmented SDUs 380- L2CAP ERTM: handle unsupported Information Response 381- SM: generate local nonce for confirm value in JW+NC+PK in Secure Connections Responder role 382 383### Added 384- `btstack_run_loop_base`: portable implementation of timer and data source management as base for platform specific implementations 385 386## Changed 387- FreeRTOS: use xQueueCreateStatic (static variant of xQueueCreate) if available for static memory-only setups 388- L2CAP ERTM: handle invalid Information Response (assume no extended features supported) 389- POSIX: use monotonic clock as timebase if available 390- HCI Transport H4/H5/EM9304 SPI: ignore block read/sent from UART driver when closed 391- HCI: Read Encryption Key Size after encryption was enabled 392- Errata 11838: 393 - GAP: gap_set_required_encryption_key_size allows to set the required key size, default = 16 (max) 394 - GAP: validate encryption key size to emit GAP Security Levels 395 396## Changes July 2019 397 398### Fixed 399- SM: Fixed regression introduced in f3582630 400- L2CAP: avoid reading l2cap signaling command len out of bounds 401- HCI Transport H4/H5/EM9304 SPI: fix payload size checks (also for 8/16-bit platforms) 402 403### Changed 404- SM: Start encryption upon receiving slave securiy request if bonded 405- hci: use 2 as HCI_INCOMING_PRE_BUFFER_SIZE in LE-only configuration for GATT Client 406 407--- 408 409## Changes June 2019 410 411### Changed 412- FreeRTOS: use freertos/.. prefix to include FreeRTOS headers if HAVE_FREERTOS_INCLUDE_PREFIX is defined 413- BNEP: add Connection Handle to BNEP_EVENT_CHANNEL_OPENED 414- Examples: renamed le_counter to gatt_counter and le_streamer to le_streamer_server to indicate suppport for GATT over BR/EDR 415 416### Fixed 417- BNEP: Bluetooth address is stored in little-endian format for all BNEP_EVENT_* 418- libusb: avoid use-after-free for SCO packets on disconnect 419 420### Added 421- example: pan_lwip_http_server using lwIP as network stack to implement PAN NAP service 422- platform/lwip/bnep_lwip.c: BNEP lwIP adapter that forwards packets between BNEP service and lwIP 423- ENABLE_GATT_OVER_CLASSIC enables support for GATT over BR/EDR in att_server 424 425--- 426 427## Changes May 2019 428 429### Changed 430- ESP32: Configure SCO over HCI after power up 431- btstack_tlv_flash_bank: support targets where a value cannot be overwritten with zero. When ENABLE_TLV_FLASH_EXPLICIT_DELETE_FIELD 432 is defined, an explicit delete field is used to indicate an invalid entry. 433 434### Fixed 435- SM: Avoid potential use-after-free on immediate disconnect (lookup connection via con handle instead of storing pointer) 436 437### Added 438- gatt_client: emit query complete event for signed write operation 439- hci_transport_h4: add workaround for flow control bug in CYW2070x, enable with ENABLE_CYPRESS_BAUDRATE_CHANGE_FLOWCONTROL_BUG_WORKAROUND 440 441--- 442 443## Changes April 2019 444 445### Changed 446- ESP32: use micro-ecc from 3rd-party as esp-idf removed it in their 3.3 release 447 448### Fixed 449- hci: pad LE Scan response with zeroes 450- SM: store local CSRK 451- ATT DB: call write callback for validated signed writes 452- ATT Server: abort signed write validation on incoming new request 453- Bluetooth SIG web scraping tools updated 454- libusb: compiles for FreeBSD 455 456### Added 457 458--- 459 460## Changes March 2019 461 462### Changed 463- use Makefile for stm32-f4discovery-cc256x port 464- le_device_db: add secure_connection argument to le_device_db_encryption_set and le_device_db_encryption_get 465 466### Fixed 467- SM: Use provided authentication requirements in slave security request 468 469### Added 470- port/stm32-f4discovery-cc256x: add support for built-in MEMS microphone 471- SM: Track if connection encryption is based on LE Secure Connection pairing 472- ATT DB: Validate if connection encrypted is based on SC if requested 473- att_db_util: support ATT_SECURITY_AUTHENTICATED_SC permission flag 474- GATT Compiler: support READ_AUTHENTICATED and WRITE_AUTHENTICATED permsission flags 475- ESP32: erase nvs flash is newer nvs version found 476- libusb: add support for nRF52840-PCA10056 running Zephyr hci_usb example 477- port/stm32-l073rz-nucleo-em9304 for Nucleo L073RZ with EM9304 DVK, replaces port/stm32-l053r8-nucleo-em9304 478 479## Changes February 2019 480 481### Changed 482- example/a2dp_sink_demo: use linear resampling to fix sample rate drift 483- btstack_audio: split interface into sink and source 484 485### Fixed 486- Crypto: fix lockup when stack is shutdown while waiting for result of HCI Command, e.g. LE Read Local P256 Public Key 487- SM: Avoid SM_EVENT_PAIRING_COMPLETE with ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION after successful pairing in responder role 488 489### Added 490- example/a2dp_sink_demo: add target role, support volume control on both devices 491- example/audio_duplex: playback audio audio source on audio sink (test audio path) 492- btstack_audio_embedded: implement audio source path 493 494--- 495 496## Changes January 2019 497 498### Changed 499- L2CAP: provide channel mode (basic/ertm) and fcs option in L2CAP_EVENT_CHANNEL_OPENED 500- RFCOMM: support L2CAP ERTM. Callbacks passed to rfcomm_enable_l2cap_ertm() are used to manage ERTM buffers 501 502### Added 503- L2CAP: emit L2CAP_EVENT_ERTM_BUFFER_RELEASED if ERTM buffer not needed/used anymore 504- L2CAP: add fcs_option to ERTM config l2cap_ertm_config_t 505- HCI: validate advertisement data length field when generating GAP_EVENT_ADVERTISING_REPORT 506- ad_parser: validate data element length fields in ad_iterator_has_more 507- Raspberry Pi 3 A+/B+ port in port/raspi, starts without power cycle 508 509### Fixed 510- HCI: release outgoing buffer on disconnect if waiting to send another ACL fragment 511- POSIX: use correct baudrate enums for baud rates higher than 921600 (Linux) 512- Crypto: directly process queued crypto operation on HCI result 513 514--- 515 516## Changes December 2018 517 518### Added 519- SM: generate and store ER / IR keys in TLV, unless manually set by application 520- hci_dump: support PacketLogger or BlueZ format output via SEGGER RTT Channel 1 Up 521 522### Fixed 523- SM: fix internal buffer overrun during random address generation 524 525## Changes November 2018 526 527### Added 528- GAP: gap_le_connection_interval provides connection interval for conn handle 529- Nordic SPP Service Server: GATT service that emulates a serial port over BLE based on Nordic Semiconductor documentation. 530- uBlox SPP Service Server: GATT service that emulates a serial port over BLE based on uBlox documentation. 531- SM: ENABLE_LE_CENTRAL_AUTO_ENCRYPTION triggers automatic encryption on connect to bonded devices 532- SM: generate and store ER / IR keys in TLV, unless manually set by application 533 534### Fixed 535- SM: prevent random address updates if gap_random_address_set was used 536- SM: fix internal buffer overrun that can cause storing of bonding information to fail 537- SM: ignore Slave Security Request after sending own Pairing Request 538- L2CAP: fix use after free on disconnect if ERTM is enabled 539- HFP: Handle multiple commands/responses in single RFCOMM packet 540- Memory Pools: clear all buffers before use 541 542--- 543 544## Changes October 2018 545 546### Added 547- SDP Server: queue incoming connections when already connected instead of rejecting them 548- 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. 549- HIDS Device: GATT service that exposes HID reports intended for HID Devices, like keyboard and mouse. 550 551### Fixed 552- HCI: fix bug in gap_inquiry_stop that triggered additional GAP_EVENT_INQUIRY_COMPLETE instead of stopping the inquiry 553- L2CAP: fix issue with outgoing connection before read remote supported complete when other channels exist 554- L2CAP ERTM: allow SDU of szie MPS in first packet that contains L2CAP SDU Length 555- L2CAP ERTM: fix memory corruption triggered if local_mtu > mps 556- L2CAP ERTM: fix outgoing fragment management 557- HFP: decline incoming RFCOMM connection after outgoing connection was started 558- AVRCP: fix crash on disconnect of connection established by remote 559 560--- 561 562## Changes September 2018 563 564### Fixed 565- HCI: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 566- L2CAP: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 567- L2CAP: Evaluate 'can send now' on HCI Disconnect as ACL buffers in Bluetooth Controller have been used for the closed connection are freed implicitly 568- L2CAP: Check can send now before sending extended information requeste needed for ERTM mode 569- L2CAP: Use valid signaling identifier for L2CAP Connection Parameter Update Request 570- 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 571- RFCOMM: Avoid use-after-free on channel finalize 572- GATT Client: stop timer on disconnect - fixes use after free / crash 573 574### Added 575- A2DP Source: Support stream reconfiguration (a2dp_source_reconfigure_stream_sampling_frequency) 576- 3rd-party: yxml is used for PBAP vCard list parsing 577- cc256xC: new v1.1 init scripts 578 579--- 580 581## Changes August 2018 582 583### Added 584- PBAP: added pbap_get_phonebook_size() to get phonebook entry count 585 586### Fixed 587- GATT Server: Allow enable Notifications/Indication with Write Command. Fixes issue with some Android devices. 588- SM: fix pairing for Secure Connections with Bonding if remote sends additional keys 589- SM: drop LTK flag from Pairing Response for Secure Connections 590- L2CAP: fix emitted L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 591 592## Changes June 2018 593 594### Added 595- btstack_audio.h: application level API for audio playback and recording 596- embedded/hal_audio.h: low-level API for audio playback and recording 597- HID Device: hid_device_connect(..) function 598- ESP32: implement hal_audio 599- DA14585: support for Dialog Semiconductor DA14585 LE-only controller 600- Raspberry Pi 3 + Raspberry Pi Zero W port in port/raspi 601 602### Changed 603- Errata 10734: 604 - SM: Generate new EC Public Keypair after each pairing 605 - SM: Abort failure with DHKEY_CHECK_FAILED if received public key is invalid (instead of unspecified error) 606- btstack.h: only include classic headers if ENABLE_CLASSIC is defined 607- windows: ignore virtual Bluetooth adapter provided by VMware 608- Replaced HCI_PACKET_BUFFER_SIZE with HCI_INCOMING_PACKET_BUFFER_SIZE and HCI_OUTGOING_PACKET_BUFFER_SIZE 609 610--- 611 612## Changes June 2018 613 614### Fixed 615- HFP: Fix Wide Band Speech bit in SDP record for both HF/AG. Missing bit prevents macOS from using mSBC 616- ATT Server: send ATT_EVENT_HANDLE_VALUE_INDICATION_COMPLETE with status ATT_HANDLE_VALUE_INDICATION_DISCONNECT on disconnect 617- AVRCP Controller: fix parsing of now playing info 618 619### Changed 620- ATT Server: ATT_HANDLE_VALUE_INDICATION_DISCONNECT is delivered to service handler if registered 621 622### Added 623- ATT Server: packet handler field added to att_service_handler_t to receive: connect/disconnect, atu exchange, indication complete 624 625--- 626 627## Changes May 2018 628 629### Added 630- GAP: re-encrypt outgoing connection if bonded 631- ATT Server: wait until re-encryption is complete 632- GATT Client: wait until re-encryption is complete 633- ATT Server: added att_server_request_to_send_notification and att_server_request_to_send_indication 634- GATT Client: if ENABLE_GATT_CLIENT_PAIRING, GATT Client starts pairing and retry operation on security error 635 636### Changed 637- ATT Server: att_server_register_can_send_now_callback is deprecated, use att_server_request_to_send_notification/indication instead 638 639### Fixed 640- SM: Fix LE Secure Connection pairing in Central role 641- le_device_db_tlv: fix seq nr management 642- SM: improve le_device_db lookup and storing of IRK 643- GATT Server: fix lookup for Client Characteristic Configuration in services with multiple Characteristics 644- RFCOMM: emit channel closed on HCI/L2CAP disconnect after sending DISC while expecting UA 645 646--- 647 648## Changes April 2018 649 650### Added 651- Crypto: btstack_crypo.h provides cryptographic functions for random data generation, AES128, EEC, CBC-MAC (Mesh) 652- SM: support pairing using Out-of-Band (OOB) data with LE Secure Connections 653- Embedded: support btstack_stdin via SEGGER RTT 654 655### Changed 656- att_db_util: added security requirement arguments to characteristic creators 657- SM: use btstack_crypto for cryptographpic functions 658- GAP: security level for Classic protocols (asides SDP) raised to 2 (encryption) 659 660### Fixed 661- HFP: fix answer call command 662- HCI: fix buffer overrun in gap_inquiry_explode 663- SDP: free service record item on sdp_unregister_service 664 665## Changes March 2018 666 667### Added 668- GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections 669- ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c 670- ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated 671 672### Fixed 673- RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1) 674- HSP HS: accept incomming SCO connection 675- SM: fix iteration over LE Device DB entries for bonding and address resolving 676- SM: store pairing information only if both devices have requested bonding 677 678--- 679 680## Changes February 2018 681 682### Added 683- GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE 684- SM: new event SM_EVENT_PAIRING_COMPLETE 685- GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done 686- GAP: add gap_delete_all_link_keys 687 688### Changed 689- GATT Client: round robin for multiple connections 690- ATT Dispatch: round robin for ATT Server & GATT Client 691- L2CAP: round robin for all L2CAP channels (fixed and dynamic) 692- btstack_link_key_db: addition functions for link key iteration 693- GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up 694- CSR: set all keys in psram instead of default 695 696### Fixed 697- tc3556x: fix startup after baud rate change 698 699--- 700 701## Changes January 2018 702 703### Added 704- Port for Windows with Zephyr HCI Firmware connected via serial port 705- em9304: upload patch containers during HCI bootup 706- Makefile for STM32-F4Discovery port 707- support for console out via SEGGER RTT 708- LE Data Channels example in BTstack and [iOS example on GitHub](https://github.com/bluekitchen/CBL2CAPChannel-Demo) 709- LE Streamer Client can send as fast as possbile as well 710- L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu 711 712### Changed 713- HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave) 714- GAP: gap_set_connection_parameters includes scan interval and window params 715- GATT Client: GATT_EVENT_MTU indicates max MTU 716- ATT DB Util: attribute handle is returned for new Services and Characteristics 717 718### Fixed 719- Windows: retry serial port operations if not all bytes have been read/written 720- HFP: avoid buffer overflows setting up messages 721- SBC Decoder: improved error handling for invalid SBC audio data 722- GAP: fix Connection Parameter Response in Central role 723- ATT DB Util: update pointer to database in case of realloc 724- GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128 725- GAP: release HCI Connnection after gap_le_conne 726- ATT: Exchanged MTU is propagate to ATT Server and GATT Client 727 728--- 729 730## Changes December 2017 731 732### Added 733- Introduced btstack_network.h network interface abstraction 734- btstack_network_posix implementation using Linux tun/tap interface 735- WICED: support for btstack_stdin (HAVE_STDIN) 736- 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. 737- TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h) 738- TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c 739- LE Device DB TLV: overwrite oldest entry if no free entries available 740- SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role 741- Example/hid_host_demo with HID parser and support for basic US keyboard layout 742- 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 743- Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304) 744 745### Changed 746- panu_demo: uses btstack_network.h now 747- WICED: configure printf to replace Linefeed with CRLF 748- SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations 749 750### Fixed 751- RFCOMM: support connection requests during connection failure 752- L2CAP: support connection requests during connection failure 753- L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU) 754- HCI: avoid double free during halting 755- SM: fixed reconnect using legacy pairing in slave role 756 757 758