Notice: Some of the services that support the smooth operation of our websites are still in the process of being restored. As a result, certain features—such as images and committer paperwork—may be temporarily unavailable. Our team is actively working to resolve these issues and restore full functionality as soon as possible.

Thank you for your patience and understanding.

Eclipse Californium (Cf) CoAP Framework 2.4.0

The 2.4.0 release comes with changes and bugfixes.

Changes in DTLS:

  • handshake messages now supports multiple fragments in one record, RFC 6347, 4.2.3
  • handshake message retransmission back off with smaller record size, RFC 6347, 4.1.1.1
  • handshake message retransmission implementation moved from DTLSConnector to Handshaker.
  • MTU clean up
  • RFC 8449, record size limit
  • interoperability tests with libcoap+tinydtls
  • add experimental/early access support for EdDSA with java 15, or external library net.i2p.crypto.eddsa.

Changes in CoAP:

  • Failover of transfer to blockwise for 4.13
  • Add caching and readme to Proxy2. Update guava to 28.2-android

Introduction of maven-toolchains-plugin with new build options see Build Using Maven

Release Date
Release Type
Minor release