0.28.0

Added

• Added raw frame loopback support and a QNETHERNET_ENABLE_RAW_FRAME_LOOPBACK macro to enable.
• Added a fourth step to the MbedTLSDemo example instructions: modify the config.
• New EthernetFrameClass functions: destinationMAC(), sourceMAC(), etherTypeOrLength(), and payload().
• Consolidated all the hardware abstraction layer (HAL) functions into one place: qnethernet_hal.cpp.
• New NullPrint and PrintDecorator utility classes in the qindesign::network::util namespace.
• Added driver_is_link_state_detectable() function to the driver. This is for detecting whether the hardware is able to read the link state.
• Added EthernetClass::isLinkStateDetectable() to detect whether the driver is capable of detecting link state.
• Added setOutgoingDiffServ(ds) and outgoingDiffServ() functions for modifying and accessing the differentiated services (DiffServ) field, respectively, in the outgoing IP header, to EthernetClient and EthernetUDP.
• Added EthernetUDP::receivedDiffServ() for retrieving the DiffServ value of the last received packet.
• Added EthernetFrameClass::clear() for clearing the outgoing and incoming buffers.

Changed

• Updated the Mbed TLS version in the README and comments to 2.28.8 (was 2.28.6).
• Updated mbedtls_hardware_poll() in MbedTLSDemo example for other platforms.
• Renamed QNETHERNET_ENABLE_CUSTOM_WRITE to QNETHERNET_CUSTOM_WRITE.
• Improved the PixelPusherServer example.
• The address-changed callback is now called for independent IP address, netmask, and gateway changes.
• Improved link function documentation for linkStatus(), linkState(), and isLinkStateDetectable().
• Updated EthernetClient::setNoDelay(flag) to return whether successful.
• Add another 2 to MEMP_NUM_SYS_TIMEOUT option for mDNS, for a total of an additional 8. Timeout exhaustion was still observed with 6. Why 8 and not 7:
  • https://lists.nongnu.org/archive/html/lwip-users/2024-05/msg00000.html
  • https://savannah.nongnu.org/patch/?9523#comment18
• Updated EthernetClient::connect() to return a Boolean value. (The function signatures don't change; they still return an int.) This matches the new definition at Ethernet - client.connect().
• Changed EthernetClient::connectNoWait() return types to bool.

Fixed

• Improved marking of unused parameters.
• Fixed up use of __has_include(), per: __has_include (The C Preprocessor)
• In mDNS, ensure there's at least an empty TXT record, otherwise the SRV record doesn't appear.
• Make the alternative yield() implementation extern "C".
• Fixed EthernetUDP data copy for zero-length outgoing packets. pbuf_take() considers NULL data an error, so only copy the data if the packet's size is not zero.