OpenThread C API Reference Updates

See "api: platform" and "api: user" labeled Pull Requests on GitHub for additional details on API Reference updates.

October 24, 2025

• Added new Border Agent TXT Data Parser API to parse the MeshCoP service TXT data from a Border Agent.

  • Added new otBorderAgentStateBitmap and otBorderAgentTxtDataInfo structs.

  • Added the OPENTHREAD_CONFIG_BORDER_AGENT_TXT_DATA_PARSER_ENABLE macro to the Border Agent module of the Configuration Variables Reference.

• Added the OPENTHREAD_CONFIG_BORDER_ROUTING_DHCP6_PD_CLIENT_MAX_LIFETIME and OPENTHREAD_CONFIG_BORDER_ROUTING_DHCP6_PD_CLIENT_MIN_LIFETIME macros to the Border Routing Manager module of the Configuration Variables Reference.

• Added new otIp6FormLinkLocalAddressFromExtAddress function to the IPV6 API.

October 10, 2025

• Added new Border Agent Tracker API to discover and track Border Agents on the infrastructure link.

  • Added new otBorderAgentTrackerAgentInfo and otBorderAgentTrackerIterator structs.

  • Added new batracker commands, beginning alphabetically with batracker (enable, disable), to the CLI Command Reference.

  • Added the OPENTHREAD_CONFIG_BORDER_AGENT_TRACKER_ENABLE macro to the Border Agent module of the Configuration Variables Reference.

• Added new tcat active and tcat standby commands to the CLI Command Reference.

• Added new otBleSecureSetTcatAgentState function to the BLE Secure API.

October 6, 2025

• Added the otInstanceGetInstance and otInstanceGetSingle functions to the Instance API.

September 22, 2025

• Added the OPENTHREAD_CONFIG_USE_STD_NEW macro to the Miscellaneous Constants module of the Configuration Variables Reference.

September 16, 2025

• Updated the link command to p2p link, and added new p2p unlink command, to the CLI Command Reference.

• Added the otP2pUnlink function to the Peer-to-Peer API.

• Added the otIp6IsLinkLocalUnicast function to the IPv6 API.

September 8, 2025

• Introduced initial peer-to-peer (P2P) support by extending the wake-up framework to establish P2P links between sleepy devices. This is part of the new Provisional API module.

  • Added new Peer-to-Peer API that includes provisional functions for the Thread peer-to-peer link.

  • Added the otP2pSetEventCallback and otP2pWakeupAndLink functions to the new Peer-to-Peer API.

  • Added the otP2pRequest struct to the new Peer-to-Peer API.

  • Added new Peer-to-Peer module to the Configuration Variables Reference. This module contains the OPENTHREAD_CONFIG_P2P_ENABLE and OPENTHREAD_CONFIG_P2P_MAX_PEERS macros.

  • Added new link command to the CLI Command Reference.

• Introduced provisional functions that control link-layer configuration. This is also part of the new Provisional API module.

  • Added new Link API.

  • Added the otWakeupRequest struct to the new Link API.

• Introduced support for the Border Router to iterate over the infrastructure interface address entries.

  • Added new br ifaddrs command to the CLI Command Reference.

  • Added new otBorderRoutingGetNextIfAddrEntry function to the Border Routing Manager API.

  • Added new otBorderRoutingIfAddrEntry struct to the Border Routing Manager API.

• Added new otCoapSetResponseFallback function to the CoAP API.

• Added new structs to the General API:

  • otNetworkDiagChildTable
  • otNetworkDiagData
  • otNetworkDiagIp6AddrList

• Added the OPENTHREAD_CONFIG_WAKEUP_MAX_DURATION and OPENTHREAD_CONFIG_WAKEUP_TX_INTERVAL macros to the Wake-up module of the Configuration Variables Reference.

August 29, 2025

• Introduced support for tracking the history of Adjacent Infrastructure Link (AIL) routers.

  • Added new history ailrouters command to the CLI Command Reference.

  • Added new otHistoryTrackerIterateAilRoutersHistory function to the History Tracker API.

  • Added new otHistoryTrackerAilRouter struct to the History Tracker API.

  • Added the OPENTHREAD_CONFIG_HISTORY_TRACKER_AIL_ROUTER_LIST_SIZE macro to the History Tracker module of the Configuration Variables Reference.

• Introduced support for tracking the history of DHCP6-Prefix Delegation (PD) routers.

  • Added new history dhcp6pd command to the CLI Command Reference.

  • Added new otHistoryTrackerIterateDhcp6PdHistory function to the History Tracker API.

  • Added new otHistoryTrackerDhcp6PdInfo struct to the History Tracker API.

  • Added the OPENTHREAD_CONFIG_HISTORY_TRACKER_DHCP6_PD_LIST_SIZE macro to the History Tracker module of the Configuration Variables Reference.

August 22, 2025

• Introduced support for tracking the history of the favored on-link prefix on a border router.

  • Added new history onlinkprefix command to the CLI Command Reference.

  • Added new otHistoryTrackerIterateFavoredOnLinkPrefixHistory function to the History Tracker API.

  • Added new otHistoryTrackerFavoredOnLinkPrefix struct to the History Tracker API.

  • Added the OPENTHREAD_CONFIG_HISTORY_TRACKER_ON_LINK_PREFIX_LIST_SIZE macro to the History Tracker module of the Configuration Variables Reference.

• Added new OT_SUPPRESS_GCC_STRING_OP_BEGIN and OT_SUPPRESS_GCC_STRING_OP_END macros to the Toolchain abstraction module.

August 13, 2025

• Introduced support for tracking the history of the favored OMR prefix on a border router.

  • Added new history omrprefix command to the CLI Command Reference.

  • Added new otHistoryTrackerIterateFavoredOmrPrefixHistory function to the History Tracker API.

  • Added new otHistoryTrackerFavoredOmrPrefix struct to the History Tracker API.

  • Added the OPENTHREAD_CONFIG_HISTORY_TRACKER_OMR_PREFIX_LIST_SIZE macro to the History Tracker module of the Configuration Variables Reference.

• Introduced a verbose logging feature in the mDNS module to aid in development and debugging by providing detailed logs of mDNS traffic.

  • Added new otMdnsIsVerboseLoggingEnabled and otMdnsSetVerboseLoggingEnabled functions to the Multicast DNS API.

  • Added the OPENTHREAD_CONFIG_MULTICAST_DEFAULT_DNS_VERBOSE_LOGGING_STATE and OPENTHREAD_CONFIG_MULTICAST_DNS_VERBOSE_LOGGING_ENABLE macros to the Multicast DNS module of the Configuration Variables Reference.

August 4, 2025

• Added new responsetimeout (set), responsetimeout, and tcat certid commands to the CLI Command Reference.

• Added new otMeshDiagGetResponseTimeout and otMeshDiagSetResponseTimeout functions to the Mesh Diagnostics API.

• Added new otPlatBleGapAdvUpdateData function to the BLE Platform abstraction module.

July 23, 2025

• Added new history dnssrpaddr command to the CLI Command Reference.

• Added new otHistoryTrackerIterateDnsSrpAddrHistory function to the History Tracker API.

• Added new otHistoryTrackerDnsSrpAddrInfo struct to the History Tracker API.

• Added the OPENTHREAD_CONFIG_HISTORY_TRACKER_DNSSRP_ADDR_LIST_SIZE macro to the History Tracker module of the Configuration Variables Reference.

July 10, 2025

• Added new br infraif command to the CLI Command Reference.

• Added new otBorderRoutingGetInfraIfInfo function to the Border Routing Manager API.

• Added new otMdnsSetAutoEnableMode and otMdnsGetAutoEnableMode functions to the Multicast DNS API.

July 1, 2025

• Added new otMessageGetInstance and otMessageRegisterTxCallback functions to the Message API.

June 23, 2025

• Added the OPENTHREAD_CONFIG_BORDER_ROUTING_DHCP6_PD_CLIENT_ENABLE macro to the Border Routing Manager module of the Configuration Variables Reference.

• Added new otPlatInfraIfDhcp6PdClientHandleReceived, otPlatInfraIfDhcp6PdClientSend, and otPlatInfraIfDhcp6PdClientSetListeningEnabled functions to the Infrastructure Interface platform abstraction module.

June 3, 2025

• Added new otHistoryTrackerBorderAgentEpskcEvent function to the History Tracker API.

• Added the OPENTHREAD_CONFIG_HISTORY_TRACKER_EPSKC_EVENT_SIZE macro to the History Tracker module of the Configuration Variables Reference.

• Added the OPENTHREAD_CONFIG_TREL_MANAGE_DNSSD_ENABLE macro to the TREL module of the Configuration Variables Reference.

May 23, 2025

• Added new csl accuracy and csl uncertainty commands to the CLI Command Reference.

• Added new otPlatDnsIsUpstreamQueryAvailable function to the DNS Platform abstraction module.

May 14, 2025

• Added new ba servicebasename command to the CLI Command Reference.

• Added new otBorderAgentSetVendorTxtData function to the Border Agent API.

• Added the OPENTHREAD_CONFIG_TREL_USE_HEAP_ENABLE macro to the TREL module of the Configuration Variables Reference.

May 9, 2025

• Added new ba (enable, disable) command to the CLI Command Reference.

• Added new otBorderAgentIsEnabled, otBorderAgentSetEnabled, and otBorderAgentSetMeshCoPServiceBaseName functions to the Border Agent API.

• Added the OPENTHREAD_CONFIG_BORDER_AGENT_MESHCOP_SERVICE_BASE_NAME and OPENTHREAD_CONFIG_BORDER_AGENT_MESHCOP_SERVICE_ENABLE macros to the Border Agent module of the Configuration Variables Reference.

April 24, 2025

• Added MultiAilDetector feature within the RoutingManager to detect whether Border Routers on the Thread mesh are likely connected to different Adjacent Infrastructure Links.

  • Added new br multiail and br multiail callback commands to the CLI Command Reference.

  • Added new otBorderRoutingIsMultiAilDetected and otBorderRoutingSetMultiAilCallback functions to the Border Routing Manager API.

  • Added the OPENTHREAD_CONFIG_BORDER_ROUTING_MULTI_AIL_DETECTION_ENABLE macro to the Border Routing Manager module of the Configuration Variables Reference.

• Added support in Dns::Client for arbitrary DNS record type queries. Callers are notified of received responses via a callback, and new methods are provided to parse and read all records in the response.

  • Added new dns query command to the CLI Command Reference.

  • Added new otDnsRecordInfo struct to the DNS API.

  • Added new otDnsClientQueryRecord, otDnsRecordResponseGetQueryName, and otDnsRecordResponseGetRecordInfo functions to the DNS API.

  • Added the OPENTHREAD_CONFIG_DNS_CLIENT_ARBITRARY_RECORD_QUERY_ENABLE macro to the DNS Client module of the Configuration Variables Reference.

  • Added new otPlatDnssdRecordQuerier and otPlatDnssdRecordResult structs to the DNS-SD Platform abstraction module.

  • Added new otPlatDnssdStartRecordQuerier and otPlatDnssdStopRecordQuerier functions to the DNS-SD Platform abstraction module.

  • Removed the otMdnsRecordQuerier and otMdnsRecordResult structs from the Multicast DNS API.

• Added feature to get the list of local host IP addresses.

  • Added new otMdnsLocalHostAddress struct to the Multicast DNS API.

  • Added new otMdnsGetNextLocalHostAddress function to the Multicast DNS API.

  • Added new otPlatMdnsHandleHostAddressRemoveAll function to the Multicast DNS Platform abstraction module.

• Added the OPENTHREAD_CONFIG_PLATFORM_BOOTLOADER_MODE_ENABLE, OPENTHREAD_ENABLE_VENDOR_EXTENSION, and OPENTHREAD_EXAMPLES_SIMULATION macros to the Miscellaneous Constants module of the Configuration Variables Reference.

April 7, 2025

• Added new br omrconfig commands, beginning alphabetically with br omrconfig auto, to the CLI Command Reference.

• Added new netdata help command to the CLI Command Reference.

• Added new netdata show commands, beginning alphabetically with netdata show local, to the CLI Command Reference.

• Added new networkdiagnostic nonpreferredchannels (set) and networkdiagnostic nonpreferredchannels commands to the CLI Command Reference.

• Added new srp server port (get) command to the CLI Command Reference.

• Added new otBorderRoutingGetOmrConfig and otBorderRoutingSetOmrConfig functions to the Border Routing Manager API.

• Added new otInstanceGetIndex function to the Instance API.

• Added new otMdnsGetLocalHostName and otMdnsSetLocalHostName functions to the Multicast DNS API.

• Added new otNetworkDiagEnhRoute and otNetworkDiagEnhRouteData structs to the General API.

• Added new otThreadGetNonPreferredChannels, otThreadSetNonPreferredChannels, and otThreadSetNonPreferredChannelsResetCallback functions to the General API.

• Added new otPlatMdnsHandleHostAddressEvent function to the Multicast DNS Platform abstraction module.

March 24, 2025

• Added new br rdnsstable command to the CLI Command Reference.

• Added new otBorderRoutingRdnssAddrEntry struct to the Border Routing Manager API.

• Added new otBorderRoutingGetNextRdnssAddrEntry and otBorderRoutingSetRdnssAddrCallback functions to the Border Routing Manager API.

• Added new otMdnsRecordQuerier and otMdnsRecordResult structs to the Multicast DNS API.

• Added new otMdnsGetNextRecordQuerier, otMdnsStartRecordQuerier, and otMdnsStopRecordQuerier functions to the Multicast DNS API.

March 10, 2025

• Added the unicast-force-add parameter to the srp server addrmode (get,set) command in the CLI Command Reference.

• Added new srp server faststart (enable) command to the CLI Command Reference.

• Added new targetpower (set) command to the CLI Command Reference.

• Added new otBorderAgentGetMeshCoPServiceTxtData function to the Border Agent API.

• Added new otBorderAgentMeshCoPServiceTxtData struct to the Border Agent API.

• Added new functions to the SRP API:

  • otSrpServerEnableFastStartMode
  • otSrpServerIsFastStartModeEnabled

• Added the OPENTHREAD_CONFIG_CHANNEL_MONITOR_AUTO_START_ENABLE macro to the Channel Monitor module of the Configuration Variables Reference.

• Added the OPENTHREAD_CONFIG_SRP_SERVER_FAST_START_MODE_ENABLE macro to the SRP Server module of the Configuration Variables Reference.

February 24, 2025

• Added the following new ephemeralkey commands to the CLI Command Reference:

  • ba ephemeralkey (enable, disable)
  • ba ephemeralkey port
  • ba ephemeralkey start [timeout-in-msec] [port]
  • ba ephemeralkey stop

• Added new ba sessions command to the CLI Command Reference.

• Removed the following commands from the CLI Command Reference:

  • ba disconnect
  • ba ephemeralkey clear
  • ba ephemeralkey feature (enable, disable)
  • ba ephemeralkey set [timeout-in-msec] [port]

• Added otBorderAgentSessionInfo struct and otBorderAgentSessionIterator struct to the Border Agent module.

• Added the following functions to the Border Agent API:

  • otBorderAgentEphemeralKeyGetState
  • otBorderAgentEphemeralKeyGetUdpPort
  • otBorderAgentEphemeralKeySetCallback
  • otBorderAgentEphemeralKeySetEnabled
  • otBorderAgentEphemeralKeyStart
  • otBorderAgentEphemeralKeyStateToString
  • otBorderAgentEphemeralKeyStop
  • otBorderAgentGetNextSessionInfo
  • otBorderAgentInitSessionIterator
  • otBorderAgentIsActive
  • otBorderAgentSetMeshCoPServiceChangedCallback

• Removed the following functions from the Border Agent API:

  • otBorderAgentClearEphemeralKey
  • otBorderAgentIsEphemeralKeyActive
  • otBorderAgentIsEphemeralKeyFeatureEnabled
  • otBorderAgentSetEphemeralKey
  • otBorderAgentSetEphemeralKeyCallback
  • otBorderAgentSetEphemeralKeyFeatureEnabled
  • otBorderAgentDisconnect
  • otBorderAgentGetState

• Added the OPENTHREAD_CONFIG_WAKEUP_FRAME_TX_CCA_ENABLE macro to the Wake-up module of the Configuration Variables Reference.

January 24, 2025

• Added new ba ephemeralkey feature (enable, disable) command to the CLI Command Reference.

• Added new otBleSecureGetPeerCertificateDer function to the BLE Secure API.

• Added new otBorderAgentIsEphemeralKeyFeatureEnabled and otBorderAgentSetEphemeralKeyFeatureEnabled functions to the Border Agent API.

• Added the OPENTHREAD_CONFIG_BORDER_AGENT_EPHEMERAL_KEY_FEATURE_ENABLED_BY_DEFAULT macro to the Border Agent module of the Configuration Variables Reference.

• Added the OPENTHREAD_CONFIG_NAT64_ICMP_IDLE_TIMEOUT_SECONDS and OPENTHREAD_CONFIG_NAT64_PORT_TRANSLATION_ENABLE macros to the NAT64 module of the Configuration Variables Reference.

January 10, 2025

• Added new attachtime command to the CLI Command Reference.

• Added version support to all netdata publish dnssrp commands, beginning alphabetically with netdata publish dnssrp anycast.

• Added new otThreadGetCurrentAttachDuration function to the General API.

• Added new otPlatTrelNotifyPeerSocketAddressDifference function to the TREL - Platform abstraction module.

• Added the OPENTHREAD_CONFIG_MLE_EXTRA_CHILD_ROUTER_LINKS_GRADUAL macro to the MLE Service module of the Configuration Variables Reference.

December 6, 2024

• Added new wakeup wake command to the CLI Command Reference.

• Added new otThreadWakeup function to the General API.

• Added the OPENTHREAD_CONFIG_WAKEUP_COORDINATOR_CONNECTION_RETRY_COUNT and OPENTHREAD_CONFIG_WAKEUP_COORDINATOR_CONNECTION_RETRY_INTERVAL macros to the Wake-up module of the Configuration Variables Reference.

November 18, 2024

• Removed the OPENTHREAD_CONFIG_MLE_SEND_LINK_REQUEST_ON_ADV_TIMEOUT macro from the MLE Service module of the Configuration Variables Reference.

• Added the OPENTHREAD_CONFIG_PARENT_SEARCH_RESELECT_TIMEOUT and OPENTHREAD_CONFIG_PARENT_SEARCH_RSS_MARGIN macros to the Parent Search module of the Configuration Variables Reference.

November 4, 2024

• Added new mac altshortaddr command to the CLI Command Reference.

• Added new otLinkGetAlternateShortAddress and otLinkSetRxOnWhenIdle functions to the Link API.

• Added new otLinkRawSetAlternateShortAddress function to the Raw Link API.

• Added new otNat64ClearIp4Cidr function to the NAT64 API.

• Added new otPlatRadioSetAlternateShortAddress function to the Radio Configuration platform extraction module.

October 21, 2024

• Added new ba disconnect command to the CLI Command Reference.

  Added new wakeup listen (enable,disable) and wakeup parameters (get,set) commands to the CLI Command Reference. Also, the wakeupchannel (get,set) command was renamed to wakeup channel (get,set).

• Added new otBorderAgentDisconnect function to the Border Agent API.

• Added new otLinkSetWakeUpListenEnabled, otLinkSetWakeupListenParameters, otLinkIsWakeupListenEnabled, and otLinkGetWakeupListenParameters functions to the Link API.

• Added the OPENTHREAD_CONFIG_WED_LISTEN_DURATION, OPENTHREAD_CONFIG_WED_LISTEN_INTERVAL, and OPENTHREAD_CONFIG_WED_RECEIVE_TIME_AFTER macros to the Wake-up module of the Configuration Variables Reference.

• Added new otPlatGetInfraIfLinkLayerAddress function to the Infrastructure Interface platform extraction module.

• Added otPlatInfraIfLinkLayerAddress struct to the Infrastructure Interface platform extraction module.

October 4, 2024

• Added new dataset wakeupchannel (get,set) and wakeupchannel (get,set) commands to the CLI Command Reference.

• Added new otBleSecureGetInstallCodeVerifyStatus function to the BLE Secure API.

  Added new otLinkGetWakeupChannel and otLinkSetWakeupChannel functions to the Link API.

• Added the OPENTHREAD_CONFIG_DEFAULT_WAKEUP_CHANNEL macro to the Miscellaneous Constants module of the Configuration Variables Reference.

September 26, 2024

• Added new Wake-up module to the Configuration Variables Reference.

• Added the OPENTHREAD_CONFIG_MAC_MULTIPURPOSE_FRAME macro to the MAC module of the Configuration Variables Reference.

September 19, 2024

• Added new tcat commands, beginning alphabetically with tcat advid, as well as a new trel port command, to the CLI Command Reference.
• Added new otTrelGetUdpPort function to the TREL - Thread Stack API.
• Removed the OPENTHREAD_CONFIG_BORDER_ROUTING_STUB_ROUTER_FLAG_IN_EMITTED_RA_ENABLE macro from the Border Routing Manager module of the Configuration Variables Reference.

September 13, 2024

• Added new otThreadGetStoreFrameCounterAhead function to the General API.
• Added the OPENTHREAD_CONFIG_DYNAMIC_STORE_FRAME_AHEAD_COUNTER_ENABLE macro to the MLE Service module of the Configuration Variables Reference.

August 29, 2024

• Added new otLinkGetFrameCounter function to the Link API.

August 23, 2024

• Added new ba counters command to the CLI Command Reference.

• Added the OPENTHREAD_CONFIG_BORDER_ROUTING_REACHABILITY_CHECK_ICMP6_ERROR_ENABLE and OPENTHREAD_CONFIG_BORDER_ROUTING_TESTING_API_ENABLE macros to the Border Routing Manager module of the Configuration Variables Reference.

• Added new otTcatAdvertisedDeviceId struct, and renamed the otTcatDeviceId struct to otTcatGeneralDeviceId, in the BLE Secure API.

• Added new otBorderAgentGetCounters function to the Border Agent API.

• Added new otBorderAgentCounters struct to the Border Agent API.

• Added new otBorderRoutingSetOnLinkPrefix function to the Border Routing Manager API.

August 7, 2024

• Renamed the linkmetrics mgmt commands to linkmetrics config, which are listed alphabetically beginning with linkmetrics config enhanced-ack clear in the CLI Command Reference.

• Added the OPENTHREAD_CONFIG_REFERENCE_DEVICE_ENABLE macro to the Network Diagnostics module of the Configuration Variables Reference.

July 26, 2024

• Added new br peers and br peers count commands to the CLI Command Reference.

• Added new otBorderRoutingCountPeerBrs and otBorderRoutingGetNextPeerBrEntry functions to the Border Routing Manager API.

• Added new otPlatRadioGetBusLatency function to the Radio Configuration platform extraction module.

• Added new otPlatRadioBusLatencyChanged function to the Radio Operation platform extraction module.

• otBorderRoutingPeerBorderRouterEntry struct added to the Border Routing Manager API.

July 12, 2024

• Added new otCoapMessageAppendUriQueryOptions function to the CoAP API.

• Added the OPENTHREAD_CONFIG_BORDER_ROUTING_TRACK_PEER_BR_INFO_ENABLE macro to the Border Routing Manager module of the Configuration Variables Reference.

June 21, 2024

• Added new otBleSecureSetTcatVendorInfo function to the BLE Secure API.

• Added new otDiagSetOutputCallback function to the Factory Diagnostics - Thread Stack API.

• Added new functions to the Multicast DNS API: otMdnsGetNextBrowser, otMdnsGetNextIp4AddressResolver, otMdnsGetNextIp6AddressResolver, otMdnsGetNextSrvResolver, and otMdnsGetNextTxtResolver.

• Added new functions to the BLE platform extraction module: otPlatBleGapAdvSetData, otPlatBleGetAdvertisementBuffer, otPlatBleGetLinkCapabilities, and otPlatBleSupportsMultiRadio.

• Added new otPlatDiagSetOutputCallback function to the Factory Diagnostics - Platform abstraction module.

• otTcatDeviceID struct added to the BLE Secure API.

• otMdnsCacheInfo struct added to the Multicast DNS API.

• To allow for seamless integration of either platform or native mDNS implementations, the following structs were added to the DNS-SD (mDNS) platform abstraction module: otPlatDnssdAddressAndTtl, otPlatDnssdAddressResolver, otPlatDnssdAddressResult, otPlatDnssdBrowseResult, otPlatDnssdBrowser, otPlatDnssdSrvResolver, otPlatDnssdSrvResult, otPlatDnssdTxtResolver, and otPlatDnssdTxtResult.

  Multicast DNS APIs have been updated to be typedef aliases of the corresponding otPlatDnssd structure definitions.

• otBleLinkCapabilities struct added to the BLE platform extraction module.

• Added the OPENTHREAD_CONFIG_DNSSD_DISCOVERY_PROXY_ENABLE macro to the DNS-SD Server module of the Configuration Variables Reference.

• Added the OPENTHREAD_CONFIG_MULTICAST_DNS_ENTRY_ITERATION_API_ENABLE macro to the Multicast DNS module of the Configuration Variables Reference.

May 17, 2024

• Added new br pd commands, beginning alphabetically with br pd (enable,disable).

• Added new otPlatLogCrashDump function to the Miscellaneous API.

• Updated the public attributes for the otBorderRoutingPrefixTableIterator struct of the Border Router Manager API.

• Added the OPENTHREAD_CONFIG_PLATFORM_LOG_CRASH_DUMP_ENABLE macro to the Miscellaneous Constants module of the Configuration Variables Reference.

April 29, 2024

• Added new test tmforiginfilter command to the CLI Command Reference.

• Added new otBorderRoutingDhcp6PdSetRequestCallback function to the Border Routing Manager API.

• Added new otBorderRoutingRequestDhcp6PdCallback typedef to the Border Routing Manager API.

• Added new otLinkMetricsManagerIsEnabled function to the Link Metrics API.

• Added new functions to the Multicast DNS API: otMdnsAllocateIterator, otMdnsFreeIterator, otMdnsGetNextHost, otMdnsGetNextKey, and otMdnsGetNextService.

• Added new functions to the Router/Leader API: otThreadIsTmfOriginFilterEnabled, otThreadSetThreadVersionCheckEnabled, and otThreadSetTmfOriginFilterEnabled.

• Added the OPENTHREAD_CONFIG_MULTICAST_DNS_AUTO_ENABLE_ON_INFRA_IF macro to the Multicast DNS module of the Configuration Variables Reference.

• Added the OPENTHREAD_CONFIG_PLATFORM_DNSSD_ALLOW_RUN_TIME_SELECTION macro to the Platform Specific Services module of the Configuration Variables Reference.

April 11, 2024

• Added a new API module for Verhoeff Checksum.

• Added a new API module for Multicast DNS.

• Added a new platform abstraction module for Multicast DNS.

• Added new verhoeff calculate and verhoeff validate commands to the CLI Command Reference.

• Added the OPENTHREAD_CONFIG_VERHOEFF_CHECKSUM_ENABLE macro to the Miscellaneous Constants module of the Configuration Variables Reference.

• Added new Multicast DNS module to the Configuration Variables Reference.

March 28, 2024

• Added new br raoptions (set,clear) command to the CLI Command Reference.
• Added the OPENTHREAD_CONFIG_CHANNEL_MANAGER_CSL_CHANNEL_SELECT_ENABLE macro to the Channel Manager module.
• Added new functions to the Channel Manager API: otChannelManagerGetAutoCslChannelSelectionEnabled, otChannelManagerRequestCslChannelSelect, and otChannelManagerSetAutoCslChannelSelectionEnabled.

March 21, 2024

• Added new dataset updater commands, beginning alphabetically with dataset updater cancel.

March 8, 2024

• Added new ba ephemeralkey commands, beginning alphabetically with ba ephemeralkey.

• Added new functions to the Border Agent API: otBorderAgentClearEphemeralKey, otBorderAgentIsEphemeralKeyActive, otBorderAgentSetEphemeralKey, and otBorderAgentSetEphemeralKeyCallback.

• Added new otThreadLinkInfo struct to the Message API.

• Added the OPENTHREAD_CONFIG_BORDER_AGENT_EPHEMERAL_KEY_ENABLE macro to the Border Agent module.

February 27, 2024

• Added new vendor commands to the CLI Command Reference: vendor appurl, vendor appurl (set), vendor model (set), vendor name (set), and vendor swversion (set).

• Added the otThreadGetVendorAppUrl and otThreadSetVendorAppUrl functions to the Thread General API.

• Added the public attribute mVendorAppUrl to the otNetworkDiagTlv struct.

• Added the OPENTHREAD_CONFIG_NET_DIAG_VENDOR_APP_URL macro to the Network Diagnostics module.

• Added the OPENTHREAD_CONFIG_IP6_RESTRICT_FORWARDING_LARGER_SCOPE_MCAST_WITH_LOCAL_SRC and OPENTHREAD_CONFIG_IP6_SLAAC_DEPRECATION_INTERVAL macros to the IP6 Service module.

February 14, 2024

• Added new coaps commands to the CLI Command Reference, beginning alphabetically with coaps connect.
• Added a new platform abstraction module for DNS-SD.
• Added new OPENTHREAD_CONFIG_PLATFORM_DNSSD_ENABLE macro to the Platform Specific Services module.
• Added new OPENTHREAD_CONFIG_SRP_SERVER_ADVERTISING_PROXY_ENABLE macro to the SRP Server module.

February 6, 2024

• Added new coap commands to the CLI Command Reference, beginning alphabetically with coap cancel.
• Added the mMeshLocal attribute to the otIp6AddressInfo struct of the Ipv6 API.

February 1, 2024

• Added new commissioner commands to the CLI Command Reference, beginning alphabetically with commissioner announce.
• Added new otCoapSecureIsClosed and otCoapSecureStartWithMaxConnAttempts functions to the CoAP Secure API.
• Added new otIp4FromIp4MappedIp6Address and otIp4ToIp4MappedIp6Address functions to the NAT64 API.
• Added new otPlatRadioResetCsl function to the Radio Operation API.

January 23, 2024

• Added new TREL module to the Configuration Variables Reference.

January 9, 2024

• Added new history commands to the CLI Command Reference, beginning alphabetically with history ip addr.
• Added new otPlatTrelCounters struct to the TREL Platform.
• Added new otUpstreamDnsCounters struct to the DNS-SD Server API.

December 27, 2023

• Added Configuration Variables Reference to main OpenThread Reference Page.

December 13, 2023

• Added debug command to the CLI Command Reference.
• Added BLE Secure API.
• Added a new platform abstraction module for BLE.
• Added new otPdProcessedRaInfo structure.

November 29, 2023

• Added new SRP server commands to the CLI Command Reference, beginning alphabetically with srp server (enable,disable).
• Added a new platform abstraction module for Multipan.
• Added new otNcpHdlcInitMulti function to the Network Co-Processor API.
• Added new otInstanceInitMultiple function to the Instance API.
• Added new otMessageIsMulticastLoopEnabled and otMessageSetMulticastLoopEnabled functions to the Message API.

November 21, 2023

• Added new SRP client commands to the CLI Command Reference, beginning alphabetically with srp client autostart (get).
• otBorderRoutingGetNextRouterEntry function added to Border Routing Manager API.
• otBorderRoutingRouterEntry struct added to Border Routing Manager.
• otPlatRadioSetRxOnWhenIdle function added to Radio Configuration.

November 7, 2023

• Added new TCP commands to the CLI Command Reference, beginning alphabetically with tcp abort.

November 2, 2023

• otLinkGetRegion and otLinkSetRegion functions added to the Link API.
• otThreadReleaseRouterId function added to the Router/Leader API.
• otNetDataGetCommissioningDataset function added to the Thread General API.
• otInstanceResetToBootloader function added to the Execution Instance API.
• Added new otLogHexDumpInfo structure.

October 13, 2023

• Added new commands to the CLI Command Reference: udp bind, udp close, udp connect, udp linksecurity (enable,disable), udp linksecurity, udp open and udp send.
• otIp6HasUnicastAddress function added to the IPv6 API.
• otBorderAgentGetId function added to the Border Agent API.

October 5, 2023

• Added new commands to the CLI Command Reference:
  • Added neighbor linkquality, neighbor list and neighbor table.
  • Added netstat.
  • Added networkdiagnostic get, networkdiagnostic reset and networkidtimeout (get,set).
• otMessageGetOrigin, otMessageIsLoopbackToHostAllowed, otMessageSetLoopbackToHostAllowed and otMessageSetOrigin functions added to the Message API.

September 28, 2023

• Added new commands to the CLI Command Reference:
  • Added mac retries direct (get,set), mac retries indirect (get,set) and mac send.
  • Added macfilter rss add, macfilter rss add-lqi, macfilter rss clear, macfilter rss and macfilter rss remove.

September 22, 2023

• Added new commands to the CLI Command Reference:
  • Added macfilter addr add, macfilter addr allowlist, macfilter addr clear, macfilter addr denylist, macfilter addr disable, macfilter addr, macfilter addr remove and macfilter.

September 14, 2023

• Added new commands to the CLI Command Reference:
  • Added tvcheck (enable,disable).
  • Added txpower (get,set).
  • Added unsecure get.
  • Added unsecureport add and unsecureport remove.

September 8, 2023

• Added new commands to the CLI Command Reference:
  • Added linkmetricsmgr (enable,disable) and linkmetricsmgr show.
  • Added scan energy, scan.
  • Added service add and service remove.
  • Added singleton, sntp query and state.
  • Added thread start, thread stop and thread version.
  • Added trel (enable,disable), trel filter (enable,disable), trel filter, trel peers and trel.
• otLinkMetricsManagerGetMetricsValueByExtAddr and otLinkMetricsManagerSetEnabled functions added to the Link Metrics API.

August 29, 2023

• Added new commands to the CLI Command Reference:
  • Added locate (set) and locate.
  • Added log filename, log level (set) and log level
  • Added preferrouterid.
  • Added promiscuous (enable,disable) and promiscuous
  • Added pskc (set), pskc -p and pskc.
  • Added pskcref (set) and pskcref.

August 15, 2023

• Added new commands to the CLI Command Reference:
  • Added uptime ms.
  • Added uptime.
  • Added version api.
  • Added version.

July 31, 2023

• Added the new command mleadvimax to the CLI Command Reference.
• otThreadGetAdvertisementTrickleIntervalMax function added to the Router/Leader API.

July 26, 2023

• Added new commands to the CLI Command Reference:
  • Added ba id (get,set).
  • Added detach async.
  • Added detach.

July 19, 2023

• Added new APIs and related CLI commands to allow users to manually set the published route preference to the Border Routing Manager API.
• Updated the SRP API for better handling of service instance names.
• Added new structs, functions, and related CLI commands to the Mesh Diagnostics API to collect statistics on the time that messages spend in TX queue.

June 26, 2023

• Added Radio Statistics API, which includes new functions along with related CLI commands:
  • Added radio (enable,disable).
  • Added radio stats clear.
  • Added radio stats.

June 13, 2023

• Added new commands to the CLI Command Reference:
  • Added mliid.
  • Added mlr reg.
  • Added mode (get,set).
  • Added multiradio.
  • Added multiradio neighbor list.
  • Added multiradio neighbor.
• otBorderRoutingDhcp6PdSetEnabled and otBorderRoutingGetPdOmrPrefix functions added to the Border Routing Manager API.

June 1, 2023

• Added new commands to the CLI Command Reference:
  • Added dns servicehost.
  • Added instanceid.
• otBorderAgentId struct added to the Border Agent API.
• otBorderAgentSetId and otBorderAgentId functions added to the Border Agent API.
• otDnsClientResolveServiceAndHostAddress function added to the DNS API.
• otInstanceGetId function added to the Instance API.
• otCliVendorSetUserCommands function added to the CLI API.

May 17, 2023

• Added new commands to the CLI Command Reference:
  • Added meshdiag topology.
  • Added neighbor conntime.
  • Added neighbor conntime list.
  • Added netdata publish replace.
  • otConvertDurationInSecondsToString and otNetDataReplacePublishedExternalRoute functions added to the Thread - General API.

May 8, 2023

• Added new commands to the CLI Command Reference:
  • Added vendor model.
  • Added vendor name.
  • Added vendor swversion.
• otBorderAgentGetId function added to the Border Agent API.
• otIp6PrefixFromString function added to the IPv6 API.
• otThreadGetVendorModel, otThreadGetVendorName, otThreadGetVendorSwVersion, otThreadSetVendorModel, otThreadSetVendorName, and otThreadSetVendorSwVersion functions added to the Thread - General API.

May 1, 2023

• otPlatCryptoEcdsaGenerateAndImportKey, otPlatCryptoEcdsaExportPublicKey, otPlatCryptoEcdsaSignUsingKeyRef, and otPlatCryptoEcdsaVerifyUsingKeyRef functions added to the Crypto Platform API.
• otPlatDiagRadioTransmitStream function added to the Platform Factory Diagnostics API.

April 18, 2023

• otIp4CidrFromString function added to the NAT64 API.

March 28, 2023

• Added new commands to the CLI Command Reference:
  • Added partitionid commands.
  • Added platform.
  • Added pollperiod (get,set).

March 23, 2023

• New commands added to the CLI Command Reference.
• otDatasetUpdateTlvs function added to the Operational Dataset API.
• otDeviceProperties struct added to the Router/Leader API.
• otLowpanContextInfo struct added to the Thread - General API.

March 15, 2023

• Added new commands to the CLI Command Reference:
  • Added dataset set (active, pending).
  • Added dataset tlvs.
  • Added netdata length.
  • Added netdata maxlength.
• Updated dns commands in the CLI Command Reference, including config, browse, compression, resolve, and service commands.
• otMeshDiagRouterInfo struct added to the Mesh Diagnostics API.
• otNetworkDiagTlv struct added to the Thread - General API.
• otRadioFrame struct added to the Radio Types API.

March 02, 2023

• Added Mesh Diagnostics API.
• Added DNS - Platform API.
• Added childrouterlinks (get, set) to the CLI Command Reference.
• Added commands from rcp version to routerupgradethreshold (get, set).
• Counter functions added to the Child Supervision API, along with childrouterlinks (get, set).
• Added new APIs to the Border Routing Manager API, along with related CLI commands.
  • Added br state to the CLI Command Reference.
  • Updated br nat64prefix, br omrprefix, and br onlinkprefix to include favored and local prefixes.
  • Removed br (enable,disable) from the CLI Command Reference.
• otMessageResetBufferInfo function added to the Message API, along with bufferinfo reset.

February 20, 2023

• Removed otTrelDisable and otTrelEnable functions from the TREL - Thread Stack API.

February 14, 2023

• Added dns commands to the CLI Command Reference, including config, browse, compression, resolve, and service commands.
• Updated nexthop and added nexthop (get) to the CLI Command Reference.
• otNcpLegacyHandlers removed from the Network Co-Processor API.
• otHistoryTrackerRouterInfo struct added to History Tracker API.

January 31, 2023

• otTcpEndpointAndCircularSendBuffer function added to the TCP Abstractions API.
• Power calibration functions added to the Radio Operation API.
• TLS mode added to the TCP Abstractions API.

January 18, 2023

• Added discover reqcallback (enable,disable) to the CLI Command Reference.
• otThreadGetNextHopAndPathCost function added to the Router/Leader API.

January 3, 2023

• otBorderRoutingClearRouteInfoOptionPreference and otBorderRoutingClearRouteInfoOptionPreference functions added to the Border Routing Manager API.
• Power calibration functions added to the Radio Operation API.
• PSKc functions moved to the Crypto Platform API.
• Added br rioprf and br rioprf clear to the CLI Command Reference.

November 18, 2022

• Added new functioPlatform Factory Diagnostics APIns to the Platform Crypto API.
• Added the otGpioMode enum and new functions to the Platform Factory Diagnostics API.
• Added otBorderRoutingCounters and otPacketsAndBytes structs to the IPv6 API.

October 26, 2022

• New otIcmp6Type enums added to the ICMPv6 API.
• OT_TOOL_PRINTF_STYLE_FORMAT_ARG_CHECK macro added to the Toolchain API.
• New attributes added to the otMleCounters struct.

October 19, 2022

• otNat64State, otNat64GetPrefixManagerState, otNat64GetTranslatorState, and otNat64SetEnabled functions added to the NAT64 API.
• Added nat64 (enable,disable) and nat64 state to the CLI Command Reference.

October 13, 2022

• Added various commands to the CLI Command Reference, including ifconfig, ipaddr, and linkmetrics.

September 21, 2022

• otIp4AddressFromString and otNat64SynthesizeIp6Address functions added to the NAT64 API.
• otSrpServerIsAutoEnableMode and otSrpServerSetAutoEnableMode functions added to the SRP API.
• Enum updates to the TCP Abstractions API.

September 15, 2022

• Added new enums, typedefs, and functions to the NAT64 API to support new NAT64 CLI commands.
• Added NAT64 commands to the CLI Command Reference, including NAT64 CIDR, prefix, mapping, and counter commands.

August 25, 2022

• Added Operational Datasets to CLI Concepts.
• Added dataset commands to the CLI Command Reference.

August 24, 2022

• otNat64ReceiveIp4Callback, otIp4NewMessage, otNat64Send, otNat64SetIp4Cidr, and otNat64SetReceiveIp4Callback functions added to the NAT64 API.
• Added child commands to the CLI Command Reference.

August 16, 2022

• otBorderRoutingGetFavoredNat64Prefix function added to the Border Routing Manager API.
• otThreadSearchForBetterParent method added to the General API.
• otPlatInfraIfDiscoverNat64Prefix and otPlatInfraIfDiscoverNat64PrefixDone methods added to the Infrastructure Interface.
• otIp6GetPrefix method added to the IPv6 API.
• otIp4ExtractFromIp6Address and otIp4IsAddressEqual functions added to the NAT64 API.
• Updated otRouterInfo struct.
• Added bbr and other commands to the CLI Command Reference.

August 3, 2022

• Added channel commands to the CLI Command Reference.

July 27, 2022

• otBorderRoutingGetFavoredOmrPrefix function added to the Border Routing Manager API.
• br favoredomrprefix added to the CLI Command Reference.

July 20, 2022

• Added new CLI Command Reference.
• Added NAT64 API.

July 14, 2022

• Updates to Border Router API.
• Added Border Routing Manager API, which includes new typedefs and functions.
• Added Infrastructure Interface API.

July 7, 2022

• otBorderRoutingGetRouteInfoOptionPreference and otBorderRoutingSetRouteInfoOptionPreference functions added to the Border Router API.

June 28, 2022

• OT_IP6_MAX_MLR_ADDRESSES macro added to the IPv6 API.
• OT_ERROR_ALREADY removed from the otNetDataPublishExternalRoute and otNetDataPublishOnMeshPrefix functions in the Thread - General API.

June 14, 2022

• otTimestamp typedef added to the Operational Dataset API.
• OT_SETTINGS_KEY_LEGACY_NAT64_PREFIX, OT_SETTINGS_KEY_LEGACY_OMR_PREFIX OT_SETTINGS_KEY_ON_LINK_PREFIX, and OT_SETTINGS_KEY_RESERVED enums removed from the Platform - Settings API.
• otSrpServerTtlConfig typedef and otSrpClientEnableAutoHostAddress, otSrpServerGetTtlConfig, otSrpServerServiceGetTtl, and otSrpServerSetTtlConfig functions added to the SRP API.
• otDetachGracefullyCallback typedef and otThreadDetachGracefully function added to the Thread - General API.

May 31, 2022

• otDnssdCounters typedef and otDnssdGetCounters function added to the DNS-SD Server API.
• Removed otPlatRadioGetCslClockUncertainty function and added otPlatRadioGetCslUncertainty function to the Radio Operation API.
• otSrpServerLeaseInfo and otSrpServerResponseCounters typedefs, otSrpClientGetTtl, otSrpClientSetTtl, otSrpServerGetPort, otSrpServerGetResponseCounters, otSrpServerHostGetLeaseInfo, and otSrpServerServiceGetLeaseInfo functions added to the SRP API.

May 18, 2022

• otCommissionerGetId and otCommissionerSetId functions added to the Commissioner API.
• TCP Abstractions API added.
• otTcpForwardProgress typedef added, otTcpBytesAcked and otTcpSendReady typedefs removed from the TCP API.
• otNetDataContainsOmrPrefix function added to the Thread - General API.

April 20, 2022

• otMessageQueueInfo typedef added to the Message API.
• otBufferInfo struct updated in the Message API.

April 13, 2022

• otPlatLogHandleLevelChanged function added to the Logging - Platform API.
• otActiveScanResult struct updated in the Link API.
• otSecurityPolicy struct updated in the Operational Dataset API.

March 30, 2022

• otBackboneRouterConfigSkipSeqNumIncrease method removed from the Backbone Router API.
• otPlatSettingsSetCriticalKeys function removed and otPlatSettingsInit updated in the Platform Settings API.

March 15, 2022

• otDnsClientResolveIp4Address function added to the DNSv6 API.
• OT_SETTINGS_KEY_BR_ULA_PREFIX enum added along with other enum updates to the Platform Settings API.

February 23, 2022

• otCliPlatLogLine function removed from the Command Line Interface API.
• otPlatLogLine function removed from the Logging - Platform API.
• otDumpCritPlat, otDumpDebgPlat, otDumpInfoPlat, otDumpNotePlat, otDumpWarnPlat, otLogCli, otLogCritPlat, otLogDebgPlat, otLogInfoPlat, otLogNotePlat, otLogWarnPlat functions added to the Logging - Thread Stack API.

February 2, 2022

• otCoapMessageSetCode function added to the CoAP API.
• otPlatCryptoRandomDeinit, otPlatCryptoRandomGet, and otPlatCryptoRandomInit functions added to the Crypto - Platform API.
• otRandomCryptoMbedTlsContextGet removed from the RNG Cryptographic API.
• The Entropy Source API has been removed.
• otHistoryTrackerNetDataEvent enum, otHistoryTrackerExternalRouteInfo and otHistoryTrackerOnMeshPrefixInfo typedefs, otHistoryTrackerIterateExternalRouteHistory and otHistoryTrackerIterateOnMeshPrefixHistory functions added to the History Tracker API.
• Added new Transition Control Blocks (TCB) macros to the TCP API.
• Added Thread Radio Encapsulation Link (TREL) API for Thread Over Infrastructure.
• Function, typedef, and struct updates to the TREL - Platform API.

January 19, 2022

• otBackboneRouterNdProxyInfo typedef and otBackboneRouterConfigSkipSeqNumIncrease method added to the Backbone Router API.
• otBorderRoutingGetNat64Prefix function added to the Border Router API.
• Updated otIp6SubscribeMulticastAddress return values on the IPv6 API.
• otJoinerStateToString function added to the Joiner API.
• Updated the otPlatLogLine function on the Logging - Platform API.
• OT_SETTINGS_KEY_NAT64_PREFIX key added to the settings enum on the Settings API.

December 7, 2021

• otLinkIsRadioFilterEnabled and otLinkSetRadioFilterEnabled functions added to the Link API.
• otThreadSetThreadVersionCheckEnabled added to the Router/Leader API.

September 27, 2021

• otCryptoContext struct added to the Crypto API.

September 20, 2021

• otHistoryTrackerMulticastAddressInfo and otHistoryTrackerUnicastAddressInfo structs added to the History Tracker API.

September 13, 2021

• Crypto API added.
• otMacKeyMaterial struct added to the Radio API.

August 30, 2021

• otHistoryTrackerNeighborInfo struct added to the History Tracker API.

August 24, 2021

• History Tracker API added.

June 22, 2021

• TCP API added.
• otMasterKey struct renamed to otNetworkKey in the Operational Dataset API.

May 10, 2021

• otSrpServerLeaseConfig struct added to the SRP API.

April 12, 2021

• DNS-SD Server API added.

April 5, 2021

• otPingSenderStatistics struct added to the Ping Sender API.
• otSrpClientBuffersServiceEntry struct added to the SRP API.

March 25, 2021

• Ping Sender API added.
• The UART Platform API has been removed.

March 9, 2021

• otDnsTxtEntry and otDnsTxtEntryIterator structs added to the DNS API.
• otMessage struct removed from the Message API.
• otMessageBuffer struct added to the Message Pool API.

February 22, 2021

• otDnsQueryConfig struct added to the DNS API.

February 16, 2021

• otDnsQuery struct removed from and otDnsServiceInfo struct added to the DNS API.

February 9, 2021

• otSrpClientGetServerAddress, otSrpClientIsRunning, and otSrpClientSetCallback functions added to the SRP API.
• Heap API is deprecated.

February 2, 2021

• otCoapBlockwiseResource struct added to the CoAP API.
• otSrpTxtEntry struct removed from the SRP API.

January 26, 2021

• SRP API added.

January 20, 2021

• Dataset Updater API added to Operational Dataset.
• Multi Radio Link API added.
• Thread Radio Encapsulation Link (TREL) API added.
• otCryptoSha256Hash struct added to the Crypto API.

November 9, 2020

• otLinkMetricsSeriesFlags struct added to the Link Metrics API.
• otBackboneRouterNdProxyInfo struct added to the Backbone Router API.

October 20, 2020

• otIp6AddressInfo struct added to the IPv6 API.

October 2, 2020

• Link Metrics API added.

August 31, 2020

• Added APIs for Coordinated Sampled Listening (CSL) support in Thread 1.2.
• otBackboneRouterMulticastListenerInfo struct added to the Backbone Router API.

August 12, 2020

• otThreadDiscoveryRequestInfo struct added to the General API.

July 15, 2020

• otBackboneRouterConfig function added to the Backbone Router API.

• otCoapAddResource function removed from the CoAP API.

• otJoinerPskd, otJoinerInfoType, otCommissionerAddJoinerWithDiscerner, and otCommissionerRemoveJoinerWithDiscerner functions added to the Commissioner API.

• otJoinerGetDiscerner, otJoinerSetDiscerner, and otJoinerDiscerner functions added to the Joiner API.

• otLinkFilterClearDefaultRssIn, and otLinkFilterSetDefaultRssIn functions added to the Link API.

• otLinkRawGetRadioTime, otLinkRawSetMacFrameCounter, and otLinkRawSetMacKey functions added to the Raw Link API.

• otDatasetGetActiveTlvs, otDatasetGetPendingTlvs, otDatasetSetActiveTlvs, otDatasetSetPendingTlvs, otThreadGetFixedDuaInterfaceIdentifier, and otThreadSetFixedDuaInterfaceIdentifier functions added to the General API.

• otUdpGetSockets function removed from the UDP Forward API.

• otUdpGetSockets function added to the UDP API.

• otPlatRadioGetNow, otPlatRadioSetMacFrameCounter, and otPlatRadioSetMacKey, functions added to the Platform Radio Configuration API.

April 27, 2020

• Backbone Router API added.
• Network Simulator Platform API added.
• otNetworkDiag* structs added to the General API for improved Network Diagnostic usability.
• otThreadGetDomainName and otThreadSetDomainName functions added to the General API.
• otCommissionerGeneratePskc function removed from the Commissioner API. Use the otDatasetGeneratePskc function in the General API to generate a PSKc going forward.
• Router API updated for access to the address cache table.

March 24, 2020

• Added OT_COAP_MAX_RETRANSMIT and OT_COAP_MIN_ACK_TIMEOUT macros to the CoAP API.

March 2, 2020

• Updated the CoAP API:
  • otCoapOptionIterator and otCoapTxParameters structs added.
  • Added helper functions to encode CoAP block options.
  • Added functions to specify per-message transmission parameters for CoAP requests and responses.

January 9, 2020

• Histogram retry functions added to the Link API.

December 3, 2019

• Server and Service configuration functions and structs moved from the Server API to the General API to support service registration by Leaders.
• *RouterRoleEnabled functions renamed to *RouterEligible in the Router API to support REED enhancements.
• otPlatLogv function removed from the Logging Platform API.
• OT_TOOL_ALIGN macro removed from the Toolchain Platform API and from various struct definitions.

November 11, 2019

• otThreadResetIp6Counters function added to the General API.
• New functions for resetting counters and getting and setting maximum frame retries added to the Link API.

October 25, 2019

• otThreadGetVersion function added to the General API.
• otPlatRadioGetCcaEnergyDetectThreshold and otPlatRadioSetCcaEnergyDetectThreshold functions added to the Radio Configuration Platform API.

September 19, 2019

• Split the Random API page into Crypto and Non-Crypto to align with source code.
• otJoinerInfo struct and otCommissionerGetNextJoinerInfo function added to the Commissioner API.
• otRadioCoexMetrics struct and otPlatRadioIsCoexEnabled function added to the Radio Types API.
• Changed the return type of numerous APIs that always succeed from otError to void.

August 9, 2019

• otPlatSettingsDeinit function added to the Settings Platform API.
• otPlatUartFlush function added to the UART Platform API.
• mTimestamp moved from the otRadioIeInfo struct to the otRadioFrame struct.
• otNetifInterfaceId enumeration removed from the IPv6 API.

June 17, 2019

• Added callbacks for notifying of state changes and joiner activity to the Commissioner API.
• Compiler-specific function modifiers of OTAPI, OTCALL, OT_CALL, and OT_CDECL removed in conjunction with removal of Windows support.

May 28, 2019

• otNeighborTableEntryInfo struct added to the Router/Leader API.
• otDatasetCreateNewNetwork and otThreadGetRloc functions added to the General API.
• otUdpSendDatagram function added to the UDP API.
• Random API moved from a platform abstraction to a module, with improved cryptographic random number generation.
• Entropy and Entropy Platform APIs added.

May 14, 2019

• otPlatRadioGetPreferredChannelMask and otPlatRadioGetSupportedChannelMask functions added to the Radio Operation Platform API.
• Removed physical layer channel functions from the Link API.

March 14, 2019

• Added support for OQPSK modulation in the 915MHz band to the Radio Types Platform API and the Link API.
• Various CoAP Secure API refinements.
• New SLAAC module functions added to the IPv6 API.
• otSemanticallyOpaqueIidGeneratorData struct and related functions removed from the IPv6 API.

February 25, 2019

• otIp6SlaacIidCreate and otIp6SlaacUpdate functions removed from the IPv6 API.

January 30, 2019

• Various CLI API refinements.
• mDidTx removed from the otRadioFrame struct.

January 23, 2019

• UDP Receiver functions added to the UDP API.
• otCoapHeader struct removed from the CoAP API. CoAP header information has been refined into the CoAP message.
• The DHCPv6 Server API has been removed.

January 7, 2019

• otIp6NewMessageFromBuffer function added to the IPv6 API.
• otDhcpAddress struct removed from the DHCPv6 API.