OpenThread C API Reference Updates

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

September 19, 2019

• Added the Heap API.
• 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.